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// SPDX-License-Identifier: AGPL-3.0
pragma solidity 0.8.28;

import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {IERC20Metadata} from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";

import {Math} from "@openzeppelin/contracts/utils/math/Math.sol";
import {BaseStrategy} from "@tokenized-strategy/BaseStrategy.sol";
import {TokenizedStrategyStorageAccess} from "./TokenizedStrategyStorageAccess.sol";

// Pendle
import {IPMarket, IStandardizedYield, IPPrincipalToken} from "@pendle/core-v2/contracts/interfaces/IPMarket.sol";
import {PendlePYOracleLib} from "@pendle/core-v2/contracts/oracles/PtYtLpOracle/PendlePYOracleLib.sol";

// Silo
import {ISilo} from "silo-core/contracts/interfaces/ISilo.sol";
import {ISiloOracle} from "silo-core/contracts/interfaces/ISiloOracle.sol";

import {ISiloConfig} from "silo-core/contracts/interfaces/ISiloConfig.sol";
import {ISiloLens} from "silo-core/contracts/SiloLens.sol";
import {IERC3156FlashBorrower} from "silo-core/contracts/interfaces/IERC3156FlashBorrower.sol";

import {LibError} from "./libraries/LibError.sol";
import {ICeresSwapper} from "./interfaces/ICeresSwapper.sol";

contract CeresLeveragedStrategy is BaseStrategy, TokenizedStrategyStorageAccess, IERC3156FlashBorrower {
    using Math for uint256;
    using SafeERC20 for IERC20;

    // Pendle config
    address public immutable PENDLE_MARKET;
    address public immutable PT;

    // Silo
    address public immutable SILO_CONFIG;
    address public immutable DEPOSIT_SILO;
    address public immutable BORROW_SILO;
    address public immutable SILO_BORROW_TOKEN;
    uint8 public immutable BORROW_TOKEN_DECIMALS;
    uint8 public immutable PT_TOKEN_DECIMALS;
    ISilo.CollateralType public immutable SILO_COLLATERAL_TYPE;

    ICeresSwapper public ceresSwapper;

    // Constants
    uint256 private constant MAX_BPS = 10_000;
    address private constant SILO_LENS_SONIC = 0x925D5466d4D5b01995E20e1245924aDa6415126a;
    uint256 private constant WAD = 1e18;
    uint256 private constant MIN_TWAP_DURATION = 5 minutes;
    uint256 private constant MAX_SLIPPAGE_LIMIT = 500; // 5% max slippage limit
    uint256 private constant DEFAULT_LTV_BUFFER = 5 * 1e16; // 5% buffer (0.05), 1e18 = 1 (100%)

    // Strategy config with default values
    uint256 public configTargetLtv = 50 * 1e16; // 50% LTV by default, 1e18 = 1 (100%)
    uint256 public configMaxSlippageBps = 100; // Maximum slippage in basis points, 1% = 100 bps
    uint32 public configTwapDuration = 30 minutes; // Default to a TWAP duration of 30 mins
    uint256 public depositLimit = type(uint256).max; // Default value
    uint256 public withdrawLimit = type(uint256).max; // Default value

    //Events
    event LossOnWithdrawal(uint256 lossAmount);
    event FlashLoan(uint256 amountRepaid);
    event StrategyRebalance();
    event MaxSlippageSet(uint256 slippage);
    event TargetLtvSet(uint256 targetLtv);
    event SwapperSet(address updatedSwapper);
    event DepositLimitSet(uint256);
    event WithdrawLimitSet(uint256);
    event TwapDurationSet(uint32);
    event StrategyFundsDeallocated();
    event TokensRecovered(address indexed token, uint256 amount);
    event DepositIdleAssets(uint256 assetAmount, uint256 ptAmount, uint256 borrowTokenBalance);

    /// @notice Constructor for the Strategy contract.
    /// @param _asset The address of the underlying asset token.
    /// @param _name The name of the strategy.
    /// @param _pendleMarket The address of the Pendle market contract.
    /// @param _siloMarketConfig The address of the Silo market config contract.
    constructor(
        address _asset,
        string memory _name,
        address _ceresSwapper,
        address _pendleMarket,
        address _siloMarketConfig,
        bool isCollateralProtected
    ) BaseStrategy(_asset, _name) {
        if (_ceresSwapper == address(0) || _pendleMarket == address(0) || _siloMarketConfig == address(0)) {
            revert LibError.InvalidAddress();
        }

        // Pendle
        _validatePendleMarket(_pendleMarket);
        PENDLE_MARKET = _pendleMarket;
        (, IPPrincipalToken ptToken, ) = IPMarket(PENDLE_MARKET).readTokens();
        PT = address(ptToken);

        // Silo
        (DEPOSIT_SILO, BORROW_SILO) = _validateSiloMarket(_siloMarketConfig);
        SILO_CONFIG = _siloMarketConfig;
        SILO_BORROW_TOKEN = ISilo(BORROW_SILO).asset();
        BORROW_TOKEN_DECIMALS = IERC20Metadata(SILO_BORROW_TOKEN).decimals();
        PT_TOKEN_DECIMALS = IERC20Metadata(PT).decimals();

        // Asset and Pendle PT token decimals should be the same
        if (IERC20Metadata(_asset).decimals() != PT_TOKEN_DECIMALS) {
            revert LibError.InvalidPendleMarket();
        }

        if (isCollateralProtected) {
            SILO_COLLATERAL_TYPE = ISilo.CollateralType.Protected;
        } else {
            SILO_COLLATERAL_TYPE = ISilo.CollateralType.Collateral;
        }

        ceresSwapper = ICeresSwapper(_ceresSwapper);
        _setSwapperApprovals();
    }

    /*//////////////////////////////////////////////////////////////
                    External/Public Functions
    //////////////////////////////////////////////////////////////*/

    /// @notice Deposits idle asset tokens to get Pendle PT and supply to Silo
    function depositIdleStrategyAssets() external nonReentrant onlyKeepers {
        _depositIdleStrategyAssets();
    }

    /// @notice Rebalances the strategy using a flash loan with specified amount and direction.
    /// @param flashLoanAmount The amount for the flash loan.
    /// @param isLeverageUp True if leveraging up, false if leveraging down.
    /// @param shouldDepositIdleAssets If true, checks all token balances and deposits assets before rebalancing
    /// @param swapData External aggregator swap data
    function rebalanceStrategy(
        uint256 flashLoanAmount,
        bool isLeverageUp,
        bool shouldDepositIdleAssets,
        bytes calldata swapData
    ) external nonReentrant onlyKeepers {
        if (TokenizedStrategy.isShutdown()) {
            _deallocateAllFunds();
        } else {
            if (shouldDepositIdleAssets) {
                _depositIdleStrategyAssets();
            }
            _rebalanceStrategy(flashLoanAmount, isLeverageUp, swapData);
        }
    }

    /// @notice Rebalances the strategy by calculating the required flash loan amount for leveraging up or down.
    /// @dev This function is called by keepers to maintain the target LTV.
    /// @param ltvBuffer The buffer to apply when checking if rebalancing is needed.
    /// @param shouldDepositIdleAssets If true, checks all token balances and deposits assets before rebalancing
    function rebalanceStrategy(uint256 ltvBuffer, bool shouldDepositIdleAssets) external nonReentrant onlyKeepers {
        if (TokenizedStrategy.isShutdown()) {
            _deallocateAllFunds();
        } else {
            if (shouldDepositIdleAssets) {
                _depositIdleStrategyAssets();
            }
            _rebalanceStrategy(ltvBuffer);
        }
    }

    /// @notice Handles the flash loan callback from the Silo protocol.
    /// The function cannot be marked as nonReentrant, as during callback,
    /// the reentrant flag will already be set by `rebalanceStrategy` function
    /// Additional validations on the contract initiator to be the strategy contract,
    /// validations on caller address and the token are in place
    /// @param initiator The address that initiated the flash loan.
    /// @param token The address of the token that was flash loaned.
    /// @param amount The amount of the token that was flash loaned.
    /// @param fee The fee for the flash loan.
    /// @param data Additional data passed to the flash loan callback.
    /// @return bytes32 The keccak256 hash of "ERC3156FlashBorrower.onFlashLoan".
    function onFlashLoan(
        address initiator,
        address token,
        uint256 amount,
        uint256 fee,
        bytes calldata data
    ) external returns (bytes32) {
        if (msg.sender != BORROW_SILO) revert LibError.InvalidFlashLoanCaller();
        if (initiator != address(this)) revert LibError.InvalidFlashLoanInitiator();
        if (token != SILO_BORROW_TOKEN) revert LibError.InvalidFlashLoanToken();

        // Decode the data
        (uint256 flashLoanAmount, bool leverageUp, bytes memory swapData) = abi.decode(data, (uint256, bool, bytes));

        if (flashLoanAmount != amount) revert LibError.InvalidFlashLoanAmount();
        uint256 flashLoanAmountWithFee = amount + fee;

        if (leverageUp) {
            _leverageUpOnFlashLoan(amount, flashLoanAmountWithFee, swapData);
        } else {
            _leverageDownOnFlashLoan(amount, flashLoanAmountWithFee, swapData);
        }

        // Repay flash loan
        emit FlashLoan(flashLoanAmountWithFee);
        IERC20(SILO_BORROW_TOKEN).forceApprove(BORROW_SILO, flashLoanAmountWithFee);
        return keccak256("ERC3156FlashBorrower.onFlashLoan");
    }

    /// @notice Rescues tokens from the strategy contract.
    /// @dev This function allows the emergency authorized address to rescue tokens that are not part of the strategy.
    /// @param _token The address of the token to rescue.
    function rescueTokens(address _token) external onlyEmergencyAuthorized {
        // Rescuing tokens is allowed only for tokens that are not part of the strategy
        if (_token == address(asset) || _token == PT || _token == SILO_BORROW_TOKEN) {
            revert LibError.InvalidToken();
        }
        uint256 amount = IERC20(_token).balanceOf(address(this));
        IERC20(_token).safeTransfer(msg.sender, amount);
        emit TokensRecovered(_token, amount);
    }

    ///////////////////// Permissioned Setter Functions ///////////////////

    /// @notice Sets the deposit limit for the strategy.
    /// @param _depositLimit The new deposit limit.
    function setDepositLimit(uint256 _depositLimit) external onlyManagement {
        depositLimit = _depositLimit;
        emit DepositLimitSet(_depositLimit);
    }

    /// @notice Sets the withdrawal limit for the strategy.
    /// @param _withdrawLimit The new withdrawal limit.
    function setWithdrawLimit(uint256 _withdrawLimit) external onlyManagement {
        withdrawLimit = _withdrawLimit;
        emit WithdrawLimitSet(_withdrawLimit);
    }

    /// @notice Sets the maximum slippage in basis points for swaps.
    /// @param _maxSlippageBps The maximum slippage in basis points (e.g., 100 for 1%).
    function setMaxSlippageBps(uint256 _maxSlippageBps) external onlyManagement {
        if (_maxSlippageBps > MAX_SLIPPAGE_LIMIT) revert LibError.AboveMaxValue(MAX_SLIPPAGE_LIMIT);
        configMaxSlippageBps = _maxSlippageBps;
        emit MaxSlippageSet(_maxSlippageBps);
    }

    /// @notice Sets the target Loan-to-Value (LTV) for the strategy.
    /// @dev Keeper (and management) can call this function to update the LTV after rebalance
    /// @param _targetLtv The target LTV in 1e18 format (e.g., 50 * 1e16 for 50%).
    function setTargetLtv(uint256 _targetLtv) external onlyKeepers {
        // Target LTV should be less than WAD and maxLtv allowed
        if (_targetLtv >= WAD) revert LibError.AboveMaxValue(WAD);

        uint256 maxLtv = getMaxLtvSilo();
        if (_targetLtv + DEFAULT_LTV_BUFFER > maxLtv) revert LibError.AboveMaxValue(maxLtv);
        configTargetLtv = _targetLtv;
        emit TargetLtvSet(_targetLtv);
    }

    /// @notice Sets the address of the swapper contract used for token swaps.
    /// @param _swapper The address of the swapper contract.
    function setSwapper(address _swapper) external onlyManagement {
        if (_swapper == address(0)) revert LibError.InvalidAddress();
        // Revoke approvals to the previous swapper
        _revokeSwapperApprovals();

        // Update swapper address and set approvals
        ceresSwapper = ICeresSwapper(_swapper);
        _setSwapperApprovals();

        emit SwapperSet(_swapper);
    }

    /// @notice Sets approvals to the swapper contract for token swaps.
    function setSwapperApprovals() external onlyManagement {
        _setSwapperApprovals();
    }

    /// @notice Revoke approvals from the swapper contract
    function revokeSwapperApprovals() external onlyManagement {
        _revokeSwapperApprovals();
    }

    /// @notice Sets the TWAP duration for oracle price.
    /// @param _twapDuration Duration to use for the Time Weighted Average Price (TWAP) of oracle
    function setTwapDuration(uint32 _twapDuration) external onlyManagement {
        if (_twapDuration < MIN_TWAP_DURATION) revert LibError.InvalidValue();
        configTwapDuration = _twapDuration;
        emit TwapDurationSet(_twapDuration);
    }

    //////////////////////// Getter Functions //////////////////////

    /// @notice Returns the available deposit limit for the strategy.
    /// @return Deposit limit.
    function availableDepositLimit(address /* _owner */) public view override returns (uint256) {
        return depositLimit;
    }

    /// @notice Returns the available withdrawal limit for the strategy.
    /// @return Withdrawal limit.
    function availableWithdrawLimit(address /* _owner */) public view override returns (uint256) {
        return withdrawLimit;
    }

    /// @notice Gets the maximum allowed Loan-to-Value (LTV) for the deposit silo.
    /// @return maxLtv The maximum LTV in 1e18 format.
    function getMaxLtvSilo() public view returns (uint256 maxLtv) {
        // Max LTV is calculated using the depositSilo, it is 0 for borrowSilo
        maxLtv = ISiloLens(SILO_LENS_SONIC).getMaxLtv(ISilo(DEPOSIT_SILO));
    }

    /// @notice Gets the current Loan-to-Value (LTV) of the strategy's position in the borrow silo.
    /// @return positionLtv The current LTV in 1e18 format.
    function getPositionLtv() public view returns (uint256 positionLtv) {
        positionLtv = ISiloLens(SILO_LENS_SONIC).getLtv(ISilo(BORROW_SILO), address(this));
    }

    /// @notice Gets the collateral balance of the strategy in the deposit silo.
    /// @return collateralBalance The collateral balance in Pendle PT units.
    function getPositionCollateral() public view returns (uint256 collateralBalance) {
        return _getSiloCollateralBalance();
    }

    /// @notice Gets the debt balance of the strategy in the borrow silo.
    /// @return debtBalance The debt balance in Silo borrow token units.
    function getPositionDebt() public view returns (uint256 debtBalance) {
        return _getSiloDebtBalance();
    }

    /// @notice Gets the net real asset balance of the strategy without looping,
    // The returned value is the net value in assets of the strategy
    /// @return totalAssets Value of the strategy in asset token
    function getRealAssetBalance()
        external
        view
        returns (uint256 totalAssets, uint256 totalCollateral, uint256 totalDebt)
    {
        return _getRealAssetBalance();
    }

    /// @notice Gets the price of the collateral token (PT) in terms of the borrow token from the Silo oracle.
    /// @return price The price of the collateral token in borrow token units (1e18 format).
    function getSiloCollateralTokenPrice() external view returns (uint256 price) {
        return _getSiloCollateralTokenPrice();
    }

    /// @notice Converts an amount of the strategy's asset to Pendle PT tokens based on the current rate.
    /// @param assetAmount The amount of strategy asset tokens to convert.
    /// @return ptAmount The equivalent amount of Pendle PT tokens.
    function convertAssetToPt(uint256 assetAmount) external view returns (uint256 ptAmount) {
        return _convertAssetToPt(assetAmount);
    }

    /// @notice Converts an amount of Pendle PT tokens to the strategy's asset based on the current rate.
    /// @param ptAmount The amount of Pendle PT tokens to convert.
    /// @return assetAmount The equivalent amount of strategy asset tokens.
    function convertPtToAsset(uint256 ptAmount) external view returns (uint256 assetAmount) {
        return _convertPtToAsset(ptAmount);
    }

    /// @notice Converts an amount of Silo borrow tokens to Pendle PT tokens based on the current price.
    /// @param borrowTokenAmount The amount of Silo borrow tokens to convert.
    /// @return ptAmount The equivalent amount of Pendle PT tokens.
    function convertBorrowTokenToPt(uint256 borrowTokenAmount) external view returns (uint256 ptAmount) {
        return _convertBorrowTokenToPt(borrowTokenAmount);
    }

    /// @notice Converts an amount of Pendle PT tokens to Silo borrow tokens based on the current price.
    /// @param ptAmount The amount of Pendle PT tokens to convert.
    /// @return borrowTokenAmount The equivalent amount of Silo borrow tokens.
    function convertPtToBorrowToken(uint256 ptAmount) external view returns (uint256 borrowTokenAmount) {
        return _convertPtToBorrowToken(ptAmount);
    }

    /// @notice Converts an amount of Silo Borrow tokens to strategy asset tokens based on the current price.
    /// @param tokenAmount The amount of SiloBorrowToken to convert.
    /// @return assetAmount The equivalent amount of asset tokens.
    function convertBorrowTokenToAsset(uint256 tokenAmount) external view returns (uint256 assetAmount) {
        return _convertBorrowTokenToAsset(tokenAmount);
    }

    /// @notice Converts an amount of strategy Asset tokens to Silo borrow tokens based on the current price.
    /// @param assetAmount The amount of asset tokens to convert to SiloBorrowToken.
    /// @return borrowTokenAmount The equivalent amount of Silo borrow tokens (SILO_BORROW_TOKEN).
    function convertAssetToBorrowToken(uint256 assetAmount) external view returns (uint256 borrowTokenAmount) {
        return _convertAssetToBorrowToken(assetAmount);
    }

    /// @notice Calculates the required flash loan amount and direction (leverage up or down) for rebalancing.
    /// @param ltvBuffer The buffer to apply when calculating FL amount
    /// @return flashLoanAmount The calculated amount for the flash loan.
    /// @return isLeverageUp True if leveraging up, false if leveraging down.
    function calculateFlashLoanAmount(
        uint256 ltvBuffer
    ) external view returns (uint256 flashLoanAmount, bool isLeverageUp) {
        return _calculateFlashLoanAmount(ltvBuffer);
    }

    /*//////////////////////////////////////////////////////////////
                    Internal Yearn override functions
    //////////////////////////////////////////////////////////////*/

    /// @notice Funds deposited to the strategy are deployed during rebalance
    /// This approach is used to avoid swaps on user deposits
    function _deployFunds(uint256 /* _amount */) internal override {}

    /// @notice Attempts to free a specified amount of the strategy's asset from the yield source.
    /// @dev This function is an internal override from the BaseStrategy.
    /// @param _amount The amount of 'asset' to be freed.
    function _freeFunds(uint256 _amount) internal override {
        uint256 amountToWithdrawInPt = _convertAssetToPt(_amount);
        uint256 ptBalance = _getSelfBalance(PT);

        // If strategy already has enough PT tokens, no need to withdraw from Silo
        if (ptBalance >= amountToWithdrawInPt) {
            // Swap PT to asset
            _swapPendlePtForAsset(amountToWithdrawInPt);
            return;
        } else {
            amountToWithdrawInPt -= ptBalance;
        }

        (uint256 totalAssets, , uint256 totalDebt) = _getRealAssetBalance();

        // If amount to withdraw is more than totalAssets, set amount to totalAssets
        if (_amount > totalAssets) {
            _amount = totalAssets;
        }

        uint256 targetDebt = (_convertAssetToBorrowToken(totalAssets - _amount) * configTargetLtv) /
            (WAD - configTargetLtv);

        // If the updated debt is less than the current debt,
        // we need wind-down the position to repay debt to Silo
        if (targetDebt < totalDebt) {
            uint256 repayAmount = totalDebt - targetDebt;
            bytes memory flashLoanData = abi.encode(repayAmount, false, "");

            // The flashloan is used to repay the Silo debt and reduce the LTV of the position
            // This is needed to ensure that the position is healthy and can be unwound safely
            // After flashloan, the strategy needs to withdraw collateral from Silo and swap the
            // received PT tokens to asset
            ISilo(BORROW_SILO).flashLoan(this, SILO_BORROW_TOKEN, repayAmount, flashLoanData);
        }

        // If the max withdraw amount is less than the withdraw amount, withdraw maxWithdrawAmount and book a loss
        uint256 maxWithdraw = ISilo(DEPOSIT_SILO).maxWithdraw(address(this), SILO_COLLATERAL_TYPE);
        if (amountToWithdrawInPt > maxWithdraw) {
            amountToWithdrawInPt = maxWithdraw;
        }

        // Withdraw and swap the required PT tokens to asset
        _withdrawCollateralFromSilo(amountToWithdrawInPt);
        uint256 assetsReceived = _swapPendlePtForAsset(_getSelfBalance(PT));

        if (assetsReceived < _amount) {
            emit LossOnWithdrawal(_amount - assetsReceived);
        }
    }

    /**
     * @dev Internal function to harvest all rewards, redeploy any idle
     * funds and return an accurate accounting of all funds currently
     * held by the Strategy.
     * @return _totalAssets A trusted and accurate account for the total
     * amount of 'asset' the strategy currently holds including idle funds.
     */
    function _harvestAndReport() internal override returns (uint256 _totalAssets) {
        if (_isLtvOutOfRange()) {
            _depositIdleStrategyAssets();
            _rebalanceStrategy(DEFAULT_LTV_BUFFER);
        }

        (_totalAssets, , ) = _getRealAssetBalance();
    }

    /// @notice Rebalances the strategy
    function _tend(uint256 /* _totalIdle */) internal override {
        _rebalanceStrategy(DEFAULT_LTV_BUFFER);
    }

    /// @notice Checks if the strategy needs to be tended (rebalanced).
    /// @return True if tending is required, false otherwise.
    function _tendTrigger() internal view override returns (bool) {
        // _tend needs to be triggered if the strategy LTV is outside configured range
        return _isLtvOutOfRange();
    }

    /// @notice Handles emergency withdrawals of assets from the strategy during shutdown.
    /// @dev This function is an internal override from the BaseStrategy.
    /// @param _amount The amount of 'asset' to withdraw.
    function _emergencyWithdraw(uint256 _amount) internal override {
        if (_amount == type(uint256).max) {
            _deallocateAllFunds();
            return;
        }

        _freeFunds(_amount);
    }

    /*//////////////////////////////////////////////////////////////
            Internal Functions with external interactions
    //////////////////////////////////////////////////////////////*/

    //////////////////////// Silo Functions ////////////////////////

    /// @notice Supplies a specified amount of Pendle PT tokens as collateral to the deposit silo.
    /// @param amount The amount of Pendle PT tokens to supply.
    function _supplyCollateralToSilo(uint256 amount) internal {
        IERC20(PT).forceApprove(DEPOSIT_SILO, amount);
        ISilo(DEPOSIT_SILO).deposit(amount, address(this), SILO_COLLATERAL_TYPE);
    }

    /// @notice Borrows a specified amount of tokens from the borrow silo.
    /// @param amount The amount of tokens to borrow.
    function _borrowFromSilo(uint256 amount) internal {
        ISilo(BORROW_SILO).borrow(amount, address(this), address(this));
    }

    /// @notice Repays a specified amount of debt to the borrow silo.
    /// @param repayAmount The amount of debt to repay.
    /// @return amountRepaid The actual amount of debt repaid.
    function _repaySiloDebt(uint256 repayAmount) internal returns (uint256 amountRepaid) {
        // Check the max loan amount of Silo
        uint256 existingBorrow = ISiloLens(SILO_LENS_SONIC).getBorrowAmount(ISilo(BORROW_SILO), address(this));
        if (repayAmount > existingBorrow) {
            repayAmount = existingBorrow;
        }

        if (repayAmount == 0) {
            // No debt to repay, return
            return 0;
        }

        IERC20(SILO_BORROW_TOKEN).forceApprove(BORROW_SILO, repayAmount);
        ISilo(BORROW_SILO).repay(repayAmount, address(this));
        return repayAmount;
    }

    /// @notice Withdraws a specified amount of collateral from the deposit silo.
    /// The function reverts if the withdrawal results in the strategy position being insolvent
    /// @param collateralAmount The amount of collateral to withdraw in Pendle PT units.
    /// @return amountWithdrawn The actual amount of collateral withdrawn.
    function _withdrawCollateralFromSilo(uint256 collateralAmount) internal returns (uint256 amountWithdrawn) {
        uint256 collateralBalance = _getSiloCollateralBalance();
        if (collateralAmount > collateralBalance) {
            // If the requested amount is more than the available collateral, withdraw all available collateral
            collateralAmount = collateralBalance;
        }

        ISilo(DEPOSIT_SILO).withdraw(collateralAmount, address(this), address(this), SILO_COLLATERAL_TYPE);
        return collateralAmount;
    }

    //////////////////////// Swapper Functions //////////////////////

    /// @notice Swap Pendle Asset tokens for Pendle PT tokens
    /// @dev NOTE: The strategy asset token is not the same as the pendle asset token
    /// For Ceres strategy, Pendle yieldToken is the strategy asset token
    function _swapAssetForPendlePt(uint256 assetAmount) internal returns (uint256) {
        uint256 minPtOut = _getSlippageAdjustedAmount(_convertAssetToPt(assetAmount));

        uint256 tokensReceived = ceresSwapper.swapFrom(
            address(asset),
            PT,
            assetAmount,
            minPtOut,
            address(this),
            abi.encode(PENDLE_MARKET)
        );

        if (tokensReceived < minPtOut) revert LibError.SlippageLimitExceeded();
        return tokensReceived;
    }

    /// @notice Swap Pendle Asset tokens for Pendle PT tokens
    /// @dev NOTE: The strategy asset token is not the same as the pendle asset token
    /// For Ceres strategy, Pendle yieldToken is the strategy asset token
    function _swapPendlePtForAsset(uint256 ptAmount) internal returns (uint256) {
        uint256 minAssetOut = _getSlippageAdjustedAmount(_convertPtToAsset(ptAmount));

        uint256 tokensReceived = ceresSwapper.swapFrom(
            PT,
            address(asset),
            ptAmount,
            minAssetOut,
            address(this),
            abi.encode(PENDLE_MARKET)
        );

        if (tokensReceived < minAssetOut) revert LibError.SlippageLimitExceeded();
        return tokensReceived;
    }

    /// @notice Swaps borrowed tokens for the strategy's asset tokens.
    /// @param _amountIn The amount of borrowed tokens to swap.
    /// @return The amount of strategy asset tokens received.
    function _swapBorrowTokenToAsset(uint256 _amountIn) internal returns (uint256) {
        uint256 minAmountOut = _getSlippageAdjustedAmount(_convertBorrowTokenToAsset(_amountIn));

        uint256 tokensReceived = ceresSwapper.swapFrom(
            SILO_BORROW_TOKEN,
            address(asset),
            _amountIn,
            minAmountOut,
            address(this),
            ""
        );
        if (tokensReceived < minAmountOut) revert LibError.SlippageLimitExceeded();
        return tokensReceived;
    }

    /*//////////////////////////////////////////////////////////////
                    Internal functions for conversions
    //////////////////////////////////////////////////////////////*/

    /// @notice Converts an amount of the strategy's asset to Pendle PT tokens based on the current rate.
    /// @param assetAmount The amount of strategy asset tokens to convert.
    /// @return ptAmount The equivalent amount of Pendle PT tokens.
    function _convertAssetToPt(uint256 assetAmount) internal view returns (uint256 ptAmount) {
        if (assetAmount > 0) {
            // PT to SY(Strategy asset) rate is in 18 decimals.
            // For example, 1 PT-wstkscUSD => 0.98 wstkscUSD (formatted) or 0.98 * 10 ** 18 (raw)
            uint256 ptPriceInAsset = PendlePYOracleLib.getPtToSyRate(IPMarket(PENDLE_MARKET), configTwapDuration);
            if (ptPriceInAsset == 0) revert LibError.InvalidPrice();

            ptAmount = assetAmount.mulDiv(WAD, ptPriceInAsset, Math.Rounding.Floor);
        }
    }

    /// @notice Converts an amount of Pendle PT tokens to the strategy's asset based on the current rate.
    /// @param ptAmount The amount of Pendle PT tokens to convert.
    /// @return assetAmount The equivalent amount of strategy asset tokens.
    function _convertPtToAsset(uint256 ptAmount) internal view returns (uint256 assetAmount) {
        if (ptAmount > 0) {
            // PT to SY(Strategy asset) rate is in 18 decimals.
            // For example, 1 PT-wstkscUSD => 0.98 wstkscUSD (formatted) or 0.98 * 10 ** 18 (raw)
            uint256 ptPriceInAsset = PendlePYOracleLib.getPtToSyRate(IPMarket(PENDLE_MARKET), configTwapDuration);
            if (ptPriceInAsset == 0) revert LibError.InvalidPrice();

            assetAmount = ptAmount.mulDiv(ptPriceInAsset, WAD, Math.Rounding.Floor);
        }
    }

    /// @notice Converts an amount of Silo borrow tokens to Pendle PT tokens based on the current price.
    /// @param borrowTokenAmount The amount of Silo borrow tokens to convert.
    /// @return ptAmount The equivalent amount of Pendle PT tokens.
    function _convertBorrowTokenToPt(uint256 borrowTokenAmount) internal view returns (uint256 ptAmount) {
        if (borrowTokenAmount > 0) {
            uint256 collateralTokenPrice = _getSiloCollateralTokenPrice();
            ptAmount =
                (borrowTokenAmount * 10 ** PT_TOKEN_DECIMALS * WAD) /
                (collateralTokenPrice * 10 ** BORROW_TOKEN_DECIMALS);
        }
    }

    /// @notice Converts an amount of Pendle PT tokens to Silo borrow tokens based on the current price.
    /// @param ptAmount The amount of Pendle PT tokens to convert.
    /// @return borrowTokenAmount The equivalent amount of Silo borrow tokens.
    function _convertPtToBorrowToken(uint256 ptAmount) internal view returns (uint256 borrowTokenAmount) {
        if (ptAmount > 0) {
            uint256 collateralTokenPrice = _getSiloCollateralTokenPrice();
            borrowTokenAmount =
                (ptAmount * collateralTokenPrice * 10 ** BORROW_TOKEN_DECIMALS) /
                (WAD * 10 ** PT_TOKEN_DECIMALS);
        }
    }

    /// @notice Converts an amount of Silo Borrow tokens to strategy asset tokens based on the current price.
    /// @param tokenAmount The amount of SiloBorrowToken to convert.
    /// @return assetAmount The equivalent amount of asset tokens.
    function _convertBorrowTokenToAsset(uint256 tokenAmount) internal view returns (uint256 assetAmount) {
        if (tokenAmount > 0) {
            // As direct oracle for Silo Borrow token to strategy Asset is not available
            // convert the tokenAmount in 2 steps: Silo Borrow Token -> PT -> Asset
            uint256 tokenAmountInPt = _convertBorrowTokenToPt(tokenAmount);
            assetAmount = _convertPtToAsset(tokenAmountInPt);
        }
    }

    /// @notice Converts an amount of strategy Asset tokens to Silo borrow tokens based on the current price.
    /// @param assetAmount The amount of asset tokens to convert to SiloBorrowToken.
    /// @return borrowTokenAmount The equivalent amount of Silo borrow tokens (SILO_BORROW_TOKEN).
    function _convertAssetToBorrowToken(uint256 assetAmount) internal view returns (uint256 borrowTokenAmount) {
        if (assetAmount > 0) {
            // As direct oracle for strategy Asset to Silo Borrow token is not available
            // convert the assetAmount in 2 steps: Asset -> PT -> Silo Borrow Token
            uint256 assetAmountInPt = _convertAssetToPt(assetAmount);
            borrowTokenAmount = _convertPtToBorrowToken(assetAmountInPt);
        }
    }

    /// @notice Calculates the slippage-adjusted amount based on the configured maximum slippage.
    /// @param amount The original amount.
    /// @return adjustedAmount The amount adjusted for slippage.
    function _getSlippageAdjustedAmount(uint256 amount) internal view returns (uint256 adjustedAmount) {
        return amount.mulDiv(MAX_BPS - configMaxSlippageBps, MAX_BPS, Math.Rounding.Ceil);
    }

    /*//////////////////////////////////////////////////////////////
                Internal misc. functions and validations
    //////////////////////////////////////////////////////////////*/

    /// @notice Validates the Pendle market configuration.
    /// @param _market The address of the Pendle market contract.
    function _validatePendleMarket(address _market) internal view {
        (IStandardizedYield stdYield, , ) = IPMarket(_market).readTokens();
        address yieldToken = stdYield.yieldToken();

        // Strategy asset must be the same as the Pendle yield token
        // SY-token is a wrapped version of the yield token
        // For example, for PT-sUSDe, yield token is sUSDe, etc.
        // More details here: https://docs.pendle.finance/Developers/Contracts/StandardizedYield#standard-sys
        if (address(asset) != yieldToken) {
            revert LibError.InvalidAsset();
        }
    }

    /// @notice Validates the Silo market configuration and identifies the deposit and borrow silos.
    /// @param _siloMarketConfig The address of the Silo market config contract.
    /// @return depositSiloAddress The address of the deposit silo.
    /// @return borrowSiloAddress The address of the borrow silo.
    function _validateSiloMarket(
        address _siloMarketConfig
    ) internal view returns (address depositSiloAddress, address borrowSiloAddress) {
        (address _silo0, address _silo1) = ISiloConfig(_siloMarketConfig).getSilos();

        if (PT == ISilo(_silo0).asset()) {
            depositSiloAddress = _silo0;
            borrowSiloAddress = _silo1;
        } else if (PT == ISilo(_silo1).asset()) {
            depositSiloAddress = _silo1;
            borrowSiloAddress = _silo0;
        } else {
            revert LibError.InvalidSiloMarket();
        }
    }

    /// @notice Internal function to rebalance the strategy using a flash loan.
    /// @param flashLoanAmount The amount for the flash loan.
    /// @param isLeverageUp True if leveraging up, false if leveraging down.
    function _rebalanceStrategy(uint256 flashLoanAmount, bool isLeverageUp, bytes memory swapData) internal {
        if (flashLoanAmount > 0) {
            // FlashLoan data contains the borrow amount and a flag to indicate that we are leveraging up
            // The flag is used to differentiate between leverage up and leverage down operations
            bytes memory flashLoanData = abi.encode(flashLoanAmount, isLeverageUp, swapData);
            ISilo(BORROW_SILO).flashLoan(this, SILO_BORROW_TOKEN, flashLoanAmount, flashLoanData);
            emit StrategyRebalance();
        }
    }

    /// @notice Rebalances the strategy by calculating the required flash loan amount and direction.
    /// @dev This internal function is called by the public `rebalanceStrategy` function.
    function _rebalanceStrategy(uint256 ltvBuffer) internal {
        (uint256 flashLoanAmount, bool isLeverageUp) = _calculateFlashLoanAmount(ltvBuffer);
        _rebalanceStrategy(flashLoanAmount, isLeverageUp, "");
    }

    /// @notice Calculates the required flash loan amount and direction (leverage up or down) for internal rebalancing.
    /// @return flashLoanAmount The calculated amount for the flash loan.
    /// @return isLeverageUp True if leveraging up, false if leveraging down.
    function _calculateFlashLoanAmount(
        uint256 ltvBuffer
    ) internal view returns (uint256 flashLoanAmount, bool isLeverageUp) {
        (uint256 totalAssets, , uint256 totalDebt) = _getRealAssetBalance();

        // Total max deposit amount for a given LTV is calculated as follows:
        // Max Deposit = Initial Deposit (Actual assets deposited) + Max flash loan amount (flMax)
        // where:
        // Initial Deposit = Total assets balance of the strategy
        // flMax = Total assets * Target LTV / (1 - Target LTV)
        uint256 totalAssetsInBorrowToken = _convertAssetToBorrowToken(totalAssets);

        uint256 maxLoan = (totalAssetsInBorrowToken * configTargetLtv) / (WAD - configTargetLtv);
        uint256 positionLtv = getPositionLtv();

        // Leverage up the position only if the position is below the target LTV range
        if (positionLtv + ltvBuffer < configTargetLtv) {
            return (maxLoan - totalDebt, true);
        } else if (positionLtv > configTargetLtv + ltvBuffer) {
            // Leverage down the position only if the position is above the target LTV range
            return (totalDebt - maxLoan, false);
        } else {
            return (0, false);
        }
    }

    /// @notice Leverages up the position onFlashLoan callback.
    /// @param amount The amount of tokens received on flashLoan
    /// @param amountWithFee The amount of tokens on flashLoan, including the flash loan fee.
    /// @param swapData Optional: Aggregator swap data
    function _leverageUpOnFlashLoan(uint256 amount, uint256 amountWithFee, bytes memory swapData) internal {
        // If aggregator swap data is provided, swap SiloBorrowToken to asset token,
        // else swap using on-chain dex
        uint256 assetsReceived;
        if (swapData.length > 0) {
            uint256 minAmountOut = _getSlippageAdjustedAmount(_convertBorrowTokenToAsset(amount));
            assetsReceived = ceresSwapper.swapUsingAggregator(
                SILO_BORROW_TOKEN,
                address(asset),
                amount,
                minAmountOut,
                address(this),
                swapData
            );
        } else {
            assetsReceived = _swapBorrowTokenToAsset(amount);
        }
        // Swap the asset to Pendle PT tokens
        uint256 ptReceived = _swapAssetForPendlePt(assetsReceived);

        // Supply the PT tokens to Silo
        _supplyCollateralToSilo(ptReceived);

        // Borrow from Silo to repay the flash loan
        _borrowFromSilo(amountWithFee);
    }

    /// @notice Leverages down the position onFlashLoan callback.
    /// @param amount The amount of tokens received on flashLoan
    /// @param amountWithFee The amount of tokens on flashLoan, including the flash loan fee.
    /// @param swapData Optional: Aggregator swap data
    function _leverageDownOnFlashLoan(uint256 amount, uint256 amountWithFee, bytes memory swapData) internal {
        // Repay silo debt
        _repaySiloDebt(amount);

        // Add some buffer to the PT amount for slippage
        uint256 ptAmount = (_convertBorrowTokenToPt(amountWithFee) * (MAX_BPS + configMaxSlippageBps)) / MAX_BPS;

        // Withdraw collateral from Silo
        uint256 amountWithdrawn = _withdrawCollateralFromSilo(ptAmount);

        // Swap the PT tokens to strategy asset
        uint256 assetAmount = _swapPendlePtForAsset(amountWithdrawn);

        // Swap the asset to borrowed token using Aggregator if swapData is provided,
        // else swap using on-chain dex
        if (swapData.length > 0) {
            uint256 minAmountOut = _getSlippageAdjustedAmount(_convertAssetToBorrowToken(assetAmount));
            ceresSwapper.swapUsingAggregator(
                address(asset),
                SILO_BORROW_TOKEN,
                assetAmount,
                minAmountOut,
                address(this),
                swapData
            );
        } else {
            // Swap and receive Exact amount of BORROW_TOKEN to repay the flash loan
            ceresSwapper.swapTo(address(asset), SILO_BORROW_TOKEN, amountWithFee, assetAmount, address(this), "");
        }
    }

    /// @notice Checks if the strategy is out of the configured LTV range.
    /// @return True if the LTV is out of range, false otherwise.
    function _isLtvOutOfRange() internal view returns (bool) {
        uint256 positionLtv = getPositionLtv();

        if (
            TokenizedStrategy.totalAssets() != 0 &&
            (positionLtv + DEFAULT_LTV_BUFFER < configTargetLtv || positionLtv > configTargetLtv + DEFAULT_LTV_BUFFER)
        ) {
            return true;
        }
        return false;
    }

    /// @notice Deposits any idle asset or PT tokens held by the strategy
    /// Swaps any idle asset tokens for Pendle PT tokens and supplies PT tokens to Silo.
    function _depositIdleStrategyAssets() internal {
        // Swap any idle Borrow token balance to assets
        uint256 borrowTokenBalance = _getSelfBalance(SILO_BORROW_TOKEN);
        if (borrowTokenBalance > 0) {
            _swapBorrowTokenToAsset(borrowTokenBalance);
        }

        // Deposit idle assets in the strategy
        uint256 assetBalance = _getSelfBalance(address(asset));
        if (assetBalance > 0) {
            _swapAssetForPendlePt(assetBalance);
        }

        // Deposit PT tokens in the strategy
        uint256 ptBalance = _getSelfBalance(PT);
        if (ptBalance > 0) {
            _supplyCollateralToSilo(ptBalance);
        }
        emit DepositIdleAssets(assetBalance, ptBalance, borrowTokenBalance);
    }

    /// @notice Set approvals for the swapper contract
    function _setSwapperApprovals() internal {
        address swapperAddress = address(ceresSwapper);
        if (swapperAddress == address(0)) return;

        IERC20(address(asset)).forceApprove(swapperAddress, type(uint256).max);
        IERC20(PT).forceApprove(swapperAddress, type(uint256).max);
        IERC20(SILO_BORROW_TOKEN).forceApprove(swapperAddress, type(uint256).max);
    }

    /// @notice Revoke approvals for the swapper contract
    function _revokeSwapperApprovals() internal {
        address swapperAddress = address(ceresSwapper);
        if (swapperAddress == address(0)) return;

        IERC20(address(asset)).forceApprove(swapperAddress, 0);
        IERC20(PT).forceApprove(swapperAddress, 0);
        IERC20(SILO_BORROW_TOKEN).forceApprove(swapperAddress, 0);
    }

    /// @notice Deallocates all funds from the strategy positions and converts them to the strategy asset.
    /// @dev This function completely unwinds the leveraged position by:
    ///      1. Repaying all outstanding debt using a flash loan
    ///      2. Withdrawing all collateral from the Silo deposit pool
    ///      3. Converting all Pendle PT tokens back to the strategy's base asset
    ///      4. Converting any remaining borrow tokens back to the base asset
    /// @dev This function is typically called during strategy migration or shutdown or emergency procedures
    ///      to ensure all positions are closed and funds are liquid.
    /// @dev After execution, the strategy should hold only the base asset tokens with no
    ///      outstanding positions in Silo or Pendle markets.
    function _deallocateAllFunds() internal {
        // Set target LTV to 0
        configTargetLtv = 0;
        uint256 strategyDebt = _getSiloDebtBalance();

        // Repay the entire debt using FlashLoan
        _rebalanceStrategy(strategyDebt, false, "");

        // Withdraw all collateral from the deposit silo
        uint256 collateralBalance = _getSiloCollateralBalance();
        if (collateralBalance > 0) {
            uint256 maxWithdraw = ISilo(DEPOSIT_SILO).maxWithdraw(address(this), SILO_COLLATERAL_TYPE);
            // To account of any remaining dust amount of debt or losses due to slippage during rebalance
            if (collateralBalance > maxWithdraw) {
                collateralBalance = maxWithdraw;
            }
            _withdrawCollateralFromSilo(collateralBalance);
        }

        // Swap all PT tokens to asset
        uint256 ptBalance = _getSelfBalance(PT);
        if (ptBalance > 0) {
            _swapPendlePtForAsset(ptBalance);
        }

        // Swap all Borrow tokens to asset
        uint256 borrowTokenBalance = _getSelfBalance(SILO_BORROW_TOKEN);
        if (borrowTokenBalance > 0) {
            _swapBorrowTokenToAsset(borrowTokenBalance);
        }

        emit StrategyFundsDeallocated();
    }

    /*//////////////////////////////////////////////////////////////
                    Internal getter functions
    //////////////////////////////////////////////////////////////*/

    /// @notice Gets the total real asset balance of the strategy, including assets, PT tokens, and Silo positions.
    /// @return totalAssets The total real asset balance in strategy asset units.
    /// @return totalCollateral Total collateral balance in Pendle PT units that the strategy holds.
    /// Includes deposited collateral + strategy PT balance
    /// @return totalDebt The debt balance of the strategy in SILO_BORROW_TOKEN units.
    /// Includes the Silo Debt of the strategy minus any token balance of the strategy
    function _getRealAssetBalance()
        internal
        view
        returns (uint256 totalAssets, uint256 totalCollateral, uint256 totalDebt)
    {
        // The total real asset balance of the strategy is calculated as follows:
        // Real balance = Asset_Bal + PT_Bal + PT_Deposited + BT_Bal - BT_Debt
        // Where:
        // Asset_Bal = Asset balance of the strategy
        // PT_Bal = PT balance of the strategy (converted to Asset)
        // PT_Deposited = PT tokens deposited to Silo as Collateral (converted to Asset)
        // BT_Bal = Silo Borrow Token balance of the strategy (converted to Asset)
        // BT_Debt = Total Debt (borrowed amount in SiloBorrowToken) (converted to Asset)
        totalCollateral = _getSelfBalance(PT) + _getSiloCollateralBalance();
        uint256 debt = _getSiloDebtBalance();
        uint256 btBalance = _getSelfBalance(SILO_BORROW_TOKEN);

        if (debt > btBalance) {
            totalDebt = debt - btBalance;
            totalAssets =
                _getSelfBalance(address(asset)) +
                _convertPtToAsset(totalCollateral) -
                _convertBorrowTokenToAsset(totalDebt);
        } else {
            // If the strategy has more SiloBorrowToken than debt, we can ignore the debt
            totalDebt = 0;
            totalAssets =
                _getSelfBalance(address(asset)) +
                _convertPtToAsset(totalCollateral) +
                _convertBorrowTokenToAsset(btBalance - debt);
        }
    }

    /// @notice Gets the collateral balance of the strategy in the deposit silo.
    /// @return collateralBalance The collateral balance in Pendle PT units.
    function _getSiloCollateralBalance() internal view returns (uint256 collateralBalance) {
        collateralBalance = ISiloLens(SILO_LENS_SONIC).collateralBalanceOfUnderlying(
            ISilo(DEPOSIT_SILO),
            address(this)
        );
    }

    /// @notice Gets the debt balance of the strategy in the borrow silo.
    /// @return debtBalance The debt balance in Silo borrow token units.
    function _getSiloDebtBalance() internal view returns (uint256 debtBalance) {
        debtBalance = ISiloLens(SILO_LENS_SONIC).debtBalanceOfUnderlying(ISilo(BORROW_SILO), address(this));
    }

    /// @notice Gets the price of the collateral token (PT) in terms of the borrow token from the Silo oracle.
    /// @return collateralTokenPrice The price of the collateral token in borrow token units
    function _getSiloCollateralTokenPrice() internal view returns (uint256 collateralTokenPrice) {
        address depositOracle = ISiloConfig(SILO_CONFIG).getConfig(DEPOSIT_SILO).solvencyOracle;

        // If only one oracle is set, Oracle must return the token's price in the exact decimals of the other token
        // that will not use an oracle. In this case, the Other token price is represented by its token amounts.
        // https://docs.silo.finance/docs/developers/dev-tutorials/oracles/#one-oracle-is-set
        if (depositOracle == address(0)) {
            collateralTokenPrice = 10 ** BORROW_TOKEN_DECIMALS; // Default price for the deposit token
        } else {
            collateralTokenPrice = ISiloOracle(depositOracle).quote(10 ** PT_TOKEN_DECIMALS, PT);
        }

        if (collateralTokenPrice == 0) revert LibError.InvalidPrice();
        return collateralTokenPrice;
    }

    /// @notice Gets the balance of a specific token held by the strategy contract.
    /// @param token The address of the token to check the balance of.
    /// @return The balance of the token held by the strategy.
    function _getSelfBalance(address token) internal view returns (uint256) {
        return IERC20(token).balanceOf(address(this));
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.20;

/**
 * @dev Interface of the ERC-20 standard as defined in the ERC.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the value of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the value of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves a `value` amount of tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 value) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets a `value` amount of tokens as the allowance of `spender` over the
     * caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the
     * allowance mechanism. `value` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 value) external returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.20;

import {IERC20} from "../IERC20.sol";

/**
 * @dev Interface for the optional metadata functions from the ERC-20 standard.
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the symbol of the token.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.3.0) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.20;

import {IERC20} from "../IERC20.sol";
import {IERC1363} from "../../../interfaces/IERC1363.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC-20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    /**
     * @dev An operation with an ERC-20 token failed.
     */
    error SafeERC20FailedOperation(address token);

    /**
     * @dev Indicates a failed `decreaseAllowance` request.
     */
    error SafeERC20FailedDecreaseAllowance(address spender, uint256 currentAllowance, uint256 requestedDecrease);

    /**
     * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeCall(token.transfer, (to, value)));
    }

    /**
     * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
     * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
     */
    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeCall(token.transferFrom, (from, to, value)));
    }

    /**
     * @dev Variant of {safeTransfer} that returns a bool instead of reverting if the operation is not successful.
     */
    function trySafeTransfer(IERC20 token, address to, uint256 value) internal returns (bool) {
        return _callOptionalReturnBool(token, abi.encodeCall(token.transfer, (to, value)));
    }

    /**
     * @dev Variant of {safeTransferFrom} that returns a bool instead of reverting if the operation is not successful.
     */
    function trySafeTransferFrom(IERC20 token, address from, address to, uint256 value) internal returns (bool) {
        return _callOptionalReturnBool(token, abi.encodeCall(token.transferFrom, (from, to, value)));
    }

    /**
     * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     *
     * IMPORTANT: If the token implements ERC-7674 (ERC-20 with temporary allowance), and if the "client"
     * smart contract uses ERC-7674 to set temporary allowances, then the "client" smart contract should avoid using
     * this function. Performing a {safeIncreaseAllowance} or {safeDecreaseAllowance} operation on a token contract
     * that has a non-zero temporary allowance (for that particular owner-spender) will result in unexpected behavior.
     */
    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 oldAllowance = token.allowance(address(this), spender);
        forceApprove(token, spender, oldAllowance + value);
    }

    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `requestedDecrease`. If `token` returns no
     * value, non-reverting calls are assumed to be successful.
     *
     * IMPORTANT: If the token implements ERC-7674 (ERC-20 with temporary allowance), and if the "client"
     * smart contract uses ERC-7674 to set temporary allowances, then the "client" smart contract should avoid using
     * this function. Performing a {safeIncreaseAllowance} or {safeDecreaseAllowance} operation on a token contract
     * that has a non-zero temporary allowance (for that particular owner-spender) will result in unexpected behavior.
     */
    function safeDecreaseAllowance(IERC20 token, address spender, uint256 requestedDecrease) internal {
        unchecked {
            uint256 currentAllowance = token.allowance(address(this), spender);
            if (currentAllowance < requestedDecrease) {
                revert SafeERC20FailedDecreaseAllowance(spender, currentAllowance, requestedDecrease);
            }
            forceApprove(token, spender, currentAllowance - requestedDecrease);
        }
    }

    /**
     * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval
     * to be set to zero before setting it to a non-zero value, such as USDT.
     *
     * NOTE: If the token implements ERC-7674, this function will not modify any temporary allowance. This function
     * only sets the "standard" allowance. Any temporary allowance will remain active, in addition to the value being
     * set here.
     */
    function forceApprove(IERC20 token, address spender, uint256 value) internal {
        bytes memory approvalCall = abi.encodeCall(token.approve, (spender, value));

        if (!_callOptionalReturnBool(token, approvalCall)) {
            _callOptionalReturn(token, abi.encodeCall(token.approve, (spender, 0)));
            _callOptionalReturn(token, approvalCall);
        }
    }

    /**
     * @dev Performs an {ERC1363} transferAndCall, with a fallback to the simple {ERC20} transfer if the target has no
     * code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
     * targeting contracts.
     *
     * Reverts if the returned value is other than `true`.
     */
    function transferAndCallRelaxed(IERC1363 token, address to, uint256 value, bytes memory data) internal {
        if (to.code.length == 0) {
            safeTransfer(token, to, value);
        } else if (!token.transferAndCall(to, value, data)) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Performs an {ERC1363} transferFromAndCall, with a fallback to the simple {ERC20} transferFrom if the target
     * has no code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
     * targeting contracts.
     *
     * Reverts if the returned value is other than `true`.
     */
    function transferFromAndCallRelaxed(
        IERC1363 token,
        address from,
        address to,
        uint256 value,
        bytes memory data
    ) internal {
        if (to.code.length == 0) {
            safeTransferFrom(token, from, to, value);
        } else if (!token.transferFromAndCall(from, to, value, data)) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Performs an {ERC1363} approveAndCall, with a fallback to the simple {ERC20} approve if the target has no
     * code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
     * targeting contracts.
     *
     * NOTE: When the recipient address (`to`) has no code (i.e. is an EOA), this function behaves as {forceApprove}.
     * Opposedly, when the recipient address (`to`) has code, this function only attempts to call {ERC1363-approveAndCall}
     * once without retrying, and relies on the returned value to be true.
     *
     * Reverts if the returned value is other than `true`.
     */
    function approveAndCallRelaxed(IERC1363 token, address to, uint256 value, bytes memory data) internal {
        if (to.code.length == 0) {
            forceApprove(token, to, value);
        } else if (!token.approveAndCall(to, value, data)) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     *
     * This is a variant of {_callOptionalReturnBool} that reverts if call fails to meet the requirements.
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        uint256 returnSize;
        uint256 returnValue;
        assembly ("memory-safe") {
            let success := call(gas(), token, 0, add(data, 0x20), mload(data), 0, 0x20)
            // bubble errors
            if iszero(success) {
                let ptr := mload(0x40)
                returndatacopy(ptr, 0, returndatasize())
                revert(ptr, returndatasize())
            }
            returnSize := returndatasize()
            returnValue := mload(0)
        }

        if (returnSize == 0 ? address(token).code.length == 0 : returnValue != 1) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     *
     * This is a variant of {_callOptionalReturn} that silently catches all reverts and returns a bool instead.
     */
    function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
        bool success;
        uint256 returnSize;
        uint256 returnValue;
        assembly ("memory-safe") {
            success := call(gas(), token, 0, add(data, 0x20), mload(data), 0, 0x20)
            returnSize := returndatasize()
            returnValue := mload(0)
        }
        return success && (returnSize == 0 ? address(token).code.length > 0 : returnValue == 1);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.3.0) (utils/math/Math.sol)

pragma solidity ^0.8.20;

import {Panic} from "../Panic.sol";
import {SafeCast} from "./SafeCast.sol";

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    enum Rounding {
        Floor, // Toward negative infinity
        Ceil, // Toward positive infinity
        Trunc, // Toward zero
        Expand // Away from zero
    }

    /**
     * @dev Return the 512-bit addition of two uint256.
     *
     * The result is stored in two 256 variables such that sum = high * 2²⁵⁶ + low.
     */
    function add512(uint256 a, uint256 b) internal pure returns (uint256 high, uint256 low) {
        assembly ("memory-safe") {
            low := add(a, b)
            high := lt(low, a)
        }
    }

    /**
     * @dev Return the 512-bit multiplication of two uint256.
     *
     * The result is stored in two 256 variables such that product = high * 2²⁵⁶ + low.
     */
    function mul512(uint256 a, uint256 b) internal pure returns (uint256 high, uint256 low) {
        // 512-bit multiply [high low] = x * y. Compute the product mod 2²⁵⁶ and mod 2²⁵⁶ - 1, then use
        // the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
        // variables such that product = high * 2²⁵⁶ + low.
        assembly ("memory-safe") {
            let mm := mulmod(a, b, not(0))
            low := mul(a, b)
            high := sub(sub(mm, low), lt(mm, low))
        }
    }

    /**
     * @dev Returns the addition of two unsigned integers, with a success flag (no overflow).
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool success, uint256 result) {
        unchecked {
            uint256 c = a + b;
            success = c >= a;
            result = c * SafeCast.toUint(success);
        }
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, with a success flag (no overflow).
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool success, uint256 result) {
        unchecked {
            uint256 c = a - b;
            success = c <= a;
            result = c * SafeCast.toUint(success);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with a success flag (no overflow).
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool success, uint256 result) {
        unchecked {
            uint256 c = a * b;
            assembly ("memory-safe") {
                // Only true when the multiplication doesn't overflow
                // (c / a == b) || (a == 0)
                success := or(eq(div(c, a), b), iszero(a))
            }
            // equivalent to: success ? c : 0
            result = c * SafeCast.toUint(success);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a success flag (no division by zero).
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool success, uint256 result) {
        unchecked {
            success = b > 0;
            assembly ("memory-safe") {
                // The `DIV` opcode returns zero when the denominator is 0.
                result := div(a, b)
            }
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a success flag (no division by zero).
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool success, uint256 result) {
        unchecked {
            success = b > 0;
            assembly ("memory-safe") {
                // The `MOD` opcode returns zero when the denominator is 0.
                result := mod(a, b)
            }
        }
    }

    /**
     * @dev Unsigned saturating addition, bounds to `2²⁵⁶ - 1` instead of overflowing.
     */
    function saturatingAdd(uint256 a, uint256 b) internal pure returns (uint256) {
        (bool success, uint256 result) = tryAdd(a, b);
        return ternary(success, result, type(uint256).max);
    }

    /**
     * @dev Unsigned saturating subtraction, bounds to zero instead of overflowing.
     */
    function saturatingSub(uint256 a, uint256 b) internal pure returns (uint256) {
        (, uint256 result) = trySub(a, b);
        return result;
    }

    /**
     * @dev Unsigned saturating multiplication, bounds to `2²⁵⁶ - 1` instead of overflowing.
     */
    function saturatingMul(uint256 a, uint256 b) internal pure returns (uint256) {
        (bool success, uint256 result) = tryMul(a, b);
        return ternary(success, result, type(uint256).max);
    }

    /**
     * @dev Branchless ternary evaluation for `a ? b : c`. Gas costs are constant.
     *
     * IMPORTANT: This function may reduce bytecode size and consume less gas when used standalone.
     * However, the compiler may optimize Solidity ternary operations (i.e. `a ? b : c`) to only compute
     * one branch when needed, making this function more expensive.
     */
    function ternary(bool condition, uint256 a, uint256 b) internal pure returns (uint256) {
        unchecked {
            // branchless ternary works because:
            // b ^ (a ^ b) == a
            // b ^ 0 == b
            return b ^ ((a ^ b) * SafeCast.toUint(condition));
        }
    }

    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return ternary(a > b, a, b);
    }

    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return ternary(a < b, a, b);
    }

    /**
     * @dev Returns the average of two numbers. The result is rounded towards
     * zero.
     */
    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow.
        return (a & b) + (a ^ b) / 2;
    }

    /**
     * @dev Returns the ceiling of the division of two numbers.
     *
     * This differs from standard division with `/` in that it rounds towards infinity instead
     * of rounding towards zero.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        if (b == 0) {
            // Guarantee the same behavior as in a regular Solidity division.
            Panic.panic(Panic.DIVISION_BY_ZERO);
        }

        // The following calculation ensures accurate ceiling division without overflow.
        // Since a is non-zero, (a - 1) / b will not overflow.
        // The largest possible result occurs when (a - 1) / b is type(uint256).max,
        // but the largest value we can obtain is type(uint256).max - 1, which happens
        // when a = type(uint256).max and b = 1.
        unchecked {
            return SafeCast.toUint(a > 0) * ((a - 1) / b + 1);
        }
    }

    /**
     * @dev Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or
     * denominator == 0.
     *
     * Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv) with further edits by
     * Uniswap Labs also under MIT license.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) {
        unchecked {
            (uint256 high, uint256 low) = mul512(x, y);

            // Handle non-overflow cases, 256 by 256 division.
            if (high == 0) {
                // Solidity will revert if denominator == 0, unlike the div opcode on its own.
                // The surrounding unchecked block does not change this fact.
                // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.
                return low / denominator;
            }

            // Make sure the result is less than 2²⁵⁶. Also prevents denominator == 0.
            if (denominator <= high) {
                Panic.panic(ternary(denominator == 0, Panic.DIVISION_BY_ZERO, Panic.UNDER_OVERFLOW));
            }

            ///////////////////////////////////////////////
            // 512 by 256 division.
            ///////////////////////////////////////////////

            // Make division exact by subtracting the remainder from [high low].
            uint256 remainder;
            assembly ("memory-safe") {
                // Compute remainder using mulmod.
                remainder := mulmod(x, y, denominator)

                // Subtract 256 bit number from 512 bit number.
                high := sub(high, gt(remainder, low))
                low := sub(low, remainder)
            }

            // Factor powers of two out of denominator and compute largest power of two divisor of denominator.
            // Always >= 1. See https://cs.stackexchange.com/q/138556/92363.

            uint256 twos = denominator & (0 - denominator);
            assembly ("memory-safe") {
                // Divide denominator by twos.
                denominator := div(denominator, twos)

                // Divide [high low] by twos.
                low := div(low, twos)

                // Flip twos such that it is 2²⁵⁶ / twos. If twos is zero, then it becomes one.
                twos := add(div(sub(0, twos), twos), 1)
            }

            // Shift in bits from high into low.
            low |= high * twos;

            // Invert denominator mod 2²⁵⁶. Now that denominator is an odd number, it has an inverse modulo 2²⁵⁶ such
            // that denominator * inv ≡ 1 mod 2²⁵⁶. Compute the inverse by starting with a seed that is correct for
            // four bits. That is, denominator * inv ≡ 1 mod 2⁴.
            uint256 inverse = (3 * denominator) ^ 2;

            // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also
            // works in modular arithmetic, doubling the correct bits in each step.
            inverse *= 2 - denominator * inverse; // inverse mod 2⁸
            inverse *= 2 - denominator * inverse; // inverse mod 2¹⁶
            inverse *= 2 - denominator * inverse; // inverse mod 2³²
            inverse *= 2 - denominator * inverse; // inverse mod 2⁶⁴
            inverse *= 2 - denominator * inverse; // inverse mod 2¹²⁸
            inverse *= 2 - denominator * inverse; // inverse mod 2²⁵⁶

            // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
            // This will give us the correct result modulo 2²⁵⁶. Since the preconditions guarantee that the outcome is
            // less than 2²⁵⁶, this is the final result. We don't need to compute the high bits of the result and high
            // is no longer required.
            result = low * inverse;
            return result;
        }
    }

    /**
     * @dev Calculates x * y / denominator with full precision, following the selected rounding direction.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) {
        return mulDiv(x, y, denominator) + SafeCast.toUint(unsignedRoundsUp(rounding) && mulmod(x, y, denominator) > 0);
    }

    /**
     * @dev Calculates floor(x * y >> n) with full precision. Throws if result overflows a uint256.
     */
    function mulShr(uint256 x, uint256 y, uint8 n) internal pure returns (uint256 result) {
        unchecked {
            (uint256 high, uint256 low) = mul512(x, y);
            if (high >= 1 << n) {
                Panic.panic(Panic.UNDER_OVERFLOW);
            }
            return (high << (256 - n)) | (low >> n);
        }
    }

    /**
     * @dev Calculates x * y >> n with full precision, following the selected rounding direction.
     */
    function mulShr(uint256 x, uint256 y, uint8 n, Rounding rounding) internal pure returns (uint256) {
        return mulShr(x, y, n) + SafeCast.toUint(unsignedRoundsUp(rounding) && mulmod(x, y, 1 << n) > 0);
    }

    /**
     * @dev Calculate the modular multiplicative inverse of a number in Z/nZ.
     *
     * If n is a prime, then Z/nZ is a field. In that case all elements are inversible, except 0.
     * If n is not a prime, then Z/nZ is not a field, and some elements might not be inversible.
     *
     * If the input value is not inversible, 0 is returned.
     *
     * NOTE: If you know for sure that n is (big) a prime, it may be cheaper to use Fermat's little theorem and get the
     * inverse using `Math.modExp(a, n - 2, n)`. See {invModPrime}.
     */
    function invMod(uint256 a, uint256 n) internal pure returns (uint256) {
        unchecked {
            if (n == 0) return 0;

            // The inverse modulo is calculated using the Extended Euclidean Algorithm (iterative version)
            // Used to compute integers x and y such that: ax + ny = gcd(a, n).
            // When the gcd is 1, then the inverse of a modulo n exists and it's x.
            // ax + ny = 1
            // ax = 1 + (-y)n
            // ax ≡ 1 (mod n) # x is the inverse of a modulo n

            // If the remainder is 0 the gcd is n right away.
            uint256 remainder = a % n;
            uint256 gcd = n;

            // Therefore the initial coefficients are:
            // ax + ny = gcd(a, n) = n
            // 0a + 1n = n
            int256 x = 0;
            int256 y = 1;

            while (remainder != 0) {
                uint256 quotient = gcd / remainder;

                (gcd, remainder) = (
                    // The old remainder is the next gcd to try.
                    remainder,
                    // Compute the next remainder.
                    // Can't overflow given that (a % gcd) * (gcd // (a % gcd)) <= gcd
                    // where gcd is at most n (capped to type(uint256).max)
                    gcd - remainder * quotient
                );

                (x, y) = (
                    // Increment the coefficient of a.
                    y,
                    // Decrement the coefficient of n.
                    // Can overflow, but the result is casted to uint256 so that the
                    // next value of y is "wrapped around" to a value between 0 and n - 1.
                    x - y * int256(quotient)
                );
            }

            if (gcd != 1) return 0; // No inverse exists.
            return ternary(x < 0, n - uint256(-x), uint256(x)); // Wrap the result if it's negative.
        }
    }

    /**
     * @dev Variant of {invMod}. More efficient, but only works if `p` is known to be a prime greater than `2`.
     *
     * From https://en.wikipedia.org/wiki/Fermat%27s_little_theorem[Fermat's little theorem], we know that if p is
     * prime, then `a**(p-1) ≡ 1 mod p`. As a consequence, we have `a * a**(p-2) ≡ 1 mod p`, which means that
     * `a**(p-2)` is the modular multiplicative inverse of a in Fp.
     *
     * NOTE: this function does NOT check that `p` is a prime greater than `2`.
     */
    function invModPrime(uint256 a, uint256 p) internal view returns (uint256) {
        unchecked {
            return Math.modExp(a, p - 2, p);
        }
    }

    /**
     * @dev Returns the modular exponentiation of the specified base, exponent and modulus (b ** e % m)
     *
     * Requirements:
     * - modulus can't be zero
     * - underlying staticcall to precompile must succeed
     *
     * IMPORTANT: The result is only valid if the underlying call succeeds. When using this function, make
     * sure the chain you're using it on supports the precompiled contract for modular exponentiation
     * at address 0x05 as specified in https://eips.ethereum.org/EIPS/eip-198[EIP-198]. Otherwise,
     * the underlying function will succeed given the lack of a revert, but the result may be incorrectly
     * interpreted as 0.
     */
    function modExp(uint256 b, uint256 e, uint256 m) internal view returns (uint256) {
        (bool success, uint256 result) = tryModExp(b, e, m);
        if (!success) {
            Panic.panic(Panic.DIVISION_BY_ZERO);
        }
        return result;
    }

    /**
     * @dev Returns the modular exponentiation of the specified base, exponent and modulus (b ** e % m).
     * It includes a success flag indicating if the operation succeeded. Operation will be marked as failed if trying
     * to operate modulo 0 or if the underlying precompile reverted.
     *
     * IMPORTANT: The result is only valid if the success flag is true. When using this function, make sure the chain
     * you're using it on supports the precompiled contract for modular exponentiation at address 0x05 as specified in
     * https://eips.ethereum.org/EIPS/eip-198[EIP-198]. Otherwise, the underlying function will succeed given the lack
     * of a revert, but the result may be incorrectly interpreted as 0.
     */
    function tryModExp(uint256 b, uint256 e, uint256 m) internal view returns (bool success, uint256 result) {
        if (m == 0) return (false, 0);
        assembly ("memory-safe") {
            let ptr := mload(0x40)
            // | Offset    | Content    | Content (Hex)                                                      |
            // |-----------|------------|--------------------------------------------------------------------|
            // | 0x00:0x1f | size of b  | 0x0000000000000000000000000000000000000000000000000000000000000020 |
            // | 0x20:0x3f | size of e  | 0x0000000000000000000000000000000000000000000000000000000000000020 |
            // | 0x40:0x5f | size of m  | 0x0000000000000000000000000000000000000000000000000000000000000020 |
            // | 0x60:0x7f | value of b | 0x<.............................................................b> |
            // | 0x80:0x9f | value of e | 0x<.............................................................e> |
            // | 0xa0:0xbf | value of m | 0x<.............................................................m> |
            mstore(ptr, 0x20)
            mstore(add(ptr, 0x20), 0x20)
            mstore(add(ptr, 0x40), 0x20)
            mstore(add(ptr, 0x60), b)
            mstore(add(ptr, 0x80), e)
            mstore(add(ptr, 0xa0), m)

            // Given the result < m, it's guaranteed to fit in 32 bytes,
            // so we can use the memory scratch space located at offset 0.
            success := staticcall(gas(), 0x05, ptr, 0xc0, 0x00, 0x20)
            result := mload(0x00)
        }
    }

    /**
     * @dev Variant of {modExp} that supports inputs of arbitrary length.
     */
    function modExp(bytes memory b, bytes memory e, bytes memory m) internal view returns (bytes memory) {
        (bool success, bytes memory result) = tryModExp(b, e, m);
        if (!success) {
            Panic.panic(Panic.DIVISION_BY_ZERO);
        }
        return result;
    }

    /**
     * @dev Variant of {tryModExp} that supports inputs of arbitrary length.
     */
    function tryModExp(
        bytes memory b,
        bytes memory e,
        bytes memory m
    ) internal view returns (bool success, bytes memory result) {
        if (_zeroBytes(m)) return (false, new bytes(0));

        uint256 mLen = m.length;

        // Encode call args in result and move the free memory pointer
        result = abi.encodePacked(b.length, e.length, mLen, b, e, m);

        assembly ("memory-safe") {
            let dataPtr := add(result, 0x20)
            // Write result on top of args to avoid allocating extra memory.
            success := staticcall(gas(), 0x05, dataPtr, mload(result), dataPtr, mLen)
            // Overwrite the length.
            // result.length > returndatasize() is guaranteed because returndatasize() == m.length
            mstore(result, mLen)
            // Set the memory pointer after the returned data.
            mstore(0x40, add(dataPtr, mLen))
        }
    }

    /**
     * @dev Returns whether the provided byte array is zero.
     */
    function _zeroBytes(bytes memory byteArray) private pure returns (bool) {
        for (uint256 i = 0; i < byteArray.length; ++i) {
            if (byteArray[i] != 0) {
                return false;
            }
        }
        return true;
    }

    /**
     * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded
     * towards zero.
     *
     * This method is based on Newton's method for computing square roots; the algorithm is restricted to only
     * using integer operations.
     */
    function sqrt(uint256 a) internal pure returns (uint256) {
        unchecked {
            // Take care of easy edge cases when a == 0 or a == 1
            if (a <= 1) {
                return a;
            }

            // In this function, we use Newton's method to get a root of `f(x) := x² - a`. It involves building a
            // sequence x_n that converges toward sqrt(a). For each iteration x_n, we also define the error between
            // the current value as `ε_n = | x_n - sqrt(a) |`.
            //
            // For our first estimation, we consider `e` the smallest power of 2 which is bigger than the square root
            // of the target. (i.e. `2**(e-1) ≤ sqrt(a) < 2**e`). We know that `e ≤ 128` because `(2¹²⁸)² = 2²⁵⁶` is
            // bigger than any uint256.
            //
            // By noticing that
            // `2**(e-1) ≤ sqrt(a) < 2**e → (2**(e-1))² ≤ a < (2**e)² → 2**(2*e-2) ≤ a < 2**(2*e)`
            // we can deduce that `e - 1` is `log2(a) / 2`. We can thus compute `x_n = 2**(e-1)` using a method similar
            // to the msb function.
            uint256 aa = a;
            uint256 xn = 1;

            if (aa >= (1 << 128)) {
                aa >>= 128;
                xn <<= 64;
            }
            if (aa >= (1 << 64)) {
                aa >>= 64;
                xn <<= 32;
            }
            if (aa >= (1 << 32)) {
                aa >>= 32;
                xn <<= 16;
            }
            if (aa >= (1 << 16)) {
                aa >>= 16;
                xn <<= 8;
            }
            if (aa >= (1 << 8)) {
                aa >>= 8;
                xn <<= 4;
            }
            if (aa >= (1 << 4)) {
                aa >>= 4;
                xn <<= 2;
            }
            if (aa >= (1 << 2)) {
                xn <<= 1;
            }

            // We now have x_n such that `x_n = 2**(e-1) ≤ sqrt(a) < 2**e = 2 * x_n`. This implies ε_n ≤ 2**(e-1).
            //
            // We can refine our estimation by noticing that the middle of that interval minimizes the error.
            // If we move x_n to equal 2**(e-1) + 2**(e-2), then we reduce the error to ε_n ≤ 2**(e-2).
            // This is going to be our x_0 (and ε_0)
            xn = (3 * xn) >> 1; // ε_0 := | x_0 - sqrt(a) | ≤ 2**(e-2)

            // From here, Newton's method give us:
            // x_{n+1} = (x_n + a / x_n) / 2
            //
            // One should note that:
            // x_{n+1}² - a = ((x_n + a / x_n) / 2)² - a
            //              = ((x_n² + a) / (2 * x_n))² - a
            //              = (x_n⁴ + 2 * a * x_n² + a²) / (4 * x_n²) - a
            //              = (x_n⁴ + 2 * a * x_n² + a² - 4 * a * x_n²) / (4 * x_n²)
            //              = (x_n⁴ - 2 * a * x_n² + a²) / (4 * x_n²)
            //              = (x_n² - a)² / (2 * x_n)²
            //              = ((x_n² - a) / (2 * x_n))²
            //              ≥ 0
            // Which proves that for all n ≥ 1, sqrt(a) ≤ x_n
            //
            // This gives us the proof of quadratic convergence of the sequence:
            // ε_{n+1} = | x_{n+1} - sqrt(a) |
            //         = | (x_n + a / x_n) / 2 - sqrt(a) |
            //         = | (x_n² + a - 2*x_n*sqrt(a)) / (2 * x_n) |
            //         = | (x_n - sqrt(a))² / (2 * x_n) |
            //         = | ε_n² / (2 * x_n) |
            //         = ε_n² / | (2 * x_n) |
            //
            // For the first iteration, we have a special case where x_0 is known:
            // ε_1 = ε_0² / | (2 * x_0) |
            //     ≤ (2**(e-2))² / (2 * (2**(e-1) + 2**(e-2)))
            //     ≤ 2**(2*e-4) / (3 * 2**(e-1))
            //     ≤ 2**(e-3) / 3
            //     ≤ 2**(e-3-log2(3))
            //     ≤ 2**(e-4.5)
            //
            // For the following iterations, we use the fact that, 2**(e-1) ≤ sqrt(a) ≤ x_n:
            // ε_{n+1} = ε_n² / | (2 * x_n) |
            //         ≤ (2**(e-k))² / (2 * 2**(e-1))
            //         ≤ 2**(2*e-2*k) / 2**e
            //         ≤ 2**(e-2*k)
            xn = (xn + a / xn) >> 1; // ε_1 := | x_1 - sqrt(a) | ≤ 2**(e-4.5)  -- special case, see above
            xn = (xn + a / xn) >> 1; // ε_2 := | x_2 - sqrt(a) | ≤ 2**(e-9)    -- general case with k = 4.5
            xn = (xn + a / xn) >> 1; // ε_3 := | x_3 - sqrt(a) | ≤ 2**(e-18)   -- general case with k = 9
            xn = (xn + a / xn) >> 1; // ε_4 := | x_4 - sqrt(a) | ≤ 2**(e-36)   -- general case with k = 18
            xn = (xn + a / xn) >> 1; // ε_5 := | x_5 - sqrt(a) | ≤ 2**(e-72)   -- general case with k = 36
            xn = (xn + a / xn) >> 1; // ε_6 := | x_6 - sqrt(a) | ≤ 2**(e-144)  -- general case with k = 72

            // Because e ≤ 128 (as discussed during the first estimation phase), we know have reached a precision
            // ε_6 ≤ 2**(e-144) < 1. Given we're operating on integers, then we can ensure that xn is now either
            // sqrt(a) or sqrt(a) + 1.
            return xn - SafeCast.toUint(xn > a / xn);
        }
    }

    /**
     * @dev Calculates sqrt(a), following the selected rounding direction.
     */
    function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = sqrt(a);
            return result + SafeCast.toUint(unsignedRoundsUp(rounding) && result * result < a);
        }
    }

    /**
     * @dev Return the log in base 2 of a positive value rounded towards zero.
     * Returns 0 if given 0.
     */
    function log2(uint256 x) internal pure returns (uint256 r) {
        // If value has upper 128 bits set, log2 result is at least 128
        r = SafeCast.toUint(x > 0xffffffffffffffffffffffffffffffff) << 7;
        // If upper 64 bits of 128-bit half set, add 64 to result
        r |= SafeCast.toUint((x >> r) > 0xffffffffffffffff) << 6;
        // If upper 32 bits of 64-bit half set, add 32 to result
        r |= SafeCast.toUint((x >> r) > 0xffffffff) << 5;
        // If upper 16 bits of 32-bit half set, add 16 to result
        r |= SafeCast.toUint((x >> r) > 0xffff) << 4;
        // If upper 8 bits of 16-bit half set, add 8 to result
        r |= SafeCast.toUint((x >> r) > 0xff) << 3;
        // If upper 4 bits of 8-bit half set, add 4 to result
        r |= SafeCast.toUint((x >> r) > 0xf) << 2;

        // Shifts value right by the current result and use it as an index into this lookup table:
        //
        // | x (4 bits) |  index  | table[index] = MSB position |
        // |------------|---------|-----------------------------|
        // |    0000    |    0    |        table[0] = 0         |
        // |    0001    |    1    |        table[1] = 0         |
        // |    0010    |    2    |        table[2] = 1         |
        // |    0011    |    3    |        table[3] = 1         |
        // |    0100    |    4    |        table[4] = 2         |
        // |    0101    |    5    |        table[5] = 2         |
        // |    0110    |    6    |        table[6] = 2         |
        // |    0111    |    7    |        table[7] = 2         |
        // |    1000    |    8    |        table[8] = 3         |
        // |    1001    |    9    |        table[9] = 3         |
        // |    1010    |   10    |        table[10] = 3        |
        // |    1011    |   11    |        table[11] = 3        |
        // |    1100    |   12    |        table[12] = 3        |
        // |    1101    |   13    |        table[13] = 3        |
        // |    1110    |   14    |        table[14] = 3        |
        // |    1111    |   15    |        table[15] = 3        |
        //
        // The lookup table is represented as a 32-byte value with the MSB positions for 0-15 in the last 16 bytes.
        assembly ("memory-safe") {
            r := or(r, byte(shr(r, x), 0x0000010102020202030303030303030300000000000000000000000000000000))
        }
    }

    /**
     * @dev Return the log in base 2, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log2(value);
            return result + SafeCast.toUint(unsignedRoundsUp(rounding) && 1 << result < value);
        }
    }

    /**
     * @dev Return the log in base 10 of a positive value rounded towards zero.
     * Returns 0 if given 0.
     */
    function log10(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >= 10 ** 64) {
                value /= 10 ** 64;
                result += 64;
            }
            if (value >= 10 ** 32) {
                value /= 10 ** 32;
                result += 32;
            }
            if (value >= 10 ** 16) {
                value /= 10 ** 16;
                result += 16;
            }
            if (value >= 10 ** 8) {
                value /= 10 ** 8;
                result += 8;
            }
            if (value >= 10 ** 4) {
                value /= 10 ** 4;
                result += 4;
            }
            if (value >= 10 ** 2) {
                value /= 10 ** 2;
                result += 2;
            }
            if (value >= 10 ** 1) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log10(value);
            return result + SafeCast.toUint(unsignedRoundsUp(rounding) && 10 ** result < value);
        }
    }

    /**
     * @dev Return the log in base 256 of a positive value rounded towards zero.
     * Returns 0 if given 0.
     *
     * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
     */
    function log256(uint256 x) internal pure returns (uint256 r) {
        // If value has upper 128 bits set, log2 result is at least 128
        r = SafeCast.toUint(x > 0xffffffffffffffffffffffffffffffff) << 7;
        // If upper 64 bits of 128-bit half set, add 64 to result
        r |= SafeCast.toUint((x >> r) > 0xffffffffffffffff) << 6;
        // If upper 32 bits of 64-bit half set, add 32 to result
        r |= SafeCast.toUint((x >> r) > 0xffffffff) << 5;
        // If upper 16 bits of 32-bit half set, add 16 to result
        r |= SafeCast.toUint((x >> r) > 0xffff) << 4;
        // Add 1 if upper 8 bits of 16-bit half set, and divide accumulated result by 8
        return (r >> 3) | SafeCast.toUint((x >> r) > 0xff);
    }

    /**
     * @dev Return the log in base 256, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log256(value);
            return result + SafeCast.toUint(unsignedRoundsUp(rounding) && 1 << (result << 3) < value);
        }
    }

    /**
     * @dev Returns whether a provided rounding mode is considered rounding up for unsigned integers.
     */
    function unsignedRoundsUp(Rounding rounding) internal pure returns (bool) {
        return uint8(rounding) % 2 == 1;
    }
}

// SPDX-License-Identifier: AGPL-3.0
pragma solidity >=0.8.18;

import {ERC20} from "@openzeppelin/contracts/token/ERC20/ERC20.sol";

// TokenizedStrategy interface used for internal view delegateCalls.
import {ITokenizedStrategy} from "./interfaces/ITokenizedStrategy.sol";

/**
 * @title YearnV3 Base Strategy
 * @author yearn.finance
 * @notice
 *  BaseStrategy implements all of the required functionality to
 *  seamlessly integrate with the `TokenizedStrategy` implementation contract
 *  allowing anyone to easily build a fully permissionless ERC-4626 compliant
 *  Vault by inheriting this contract and overriding three simple functions.

 *  It utilizes an immutable proxy pattern that allows the BaseStrategy
 *  to remain simple and small. All standard logic is held within the
 *  `TokenizedStrategy` and is reused over any n strategies all using the
 *  `fallback` function to delegatecall the implementation so that strategists
 *  can only be concerned with writing their strategy specific code.
 *
 *  This contract should be inherited and the three main abstract methods
 *  `_deployFunds`, `_freeFunds` and `_harvestAndReport` implemented to adapt
 *  the Strategy to the particular needs it has to generate yield. There are
 *  other optional methods that can be implemented to further customize
 *  the strategy if desired.
 *
 *  All default storage for the strategy is controlled and updated by the
 *  `TokenizedStrategy`. The implementation holds a storage struct that
 *  contains all needed global variables in a manual storage slot. This
 *  means strategists can feel free to implement their own custom storage
 *  variables as they need with no concern of collisions. All global variables
 *  can be viewed within the Strategy by a simple call using the
 *  `TokenizedStrategy` variable. IE: TokenizedStrategy.globalVariable();.
 */
abstract contract BaseStrategy {
    /*//////////////////////////////////////////////////////////////
                            MODIFIERS
    //////////////////////////////////////////////////////////////*/
    /**
     * @dev Used on TokenizedStrategy callback functions to make sure it is post
     * a delegateCall from this address to the TokenizedStrategy.
     */
    modifier onlySelf() {
        _onlySelf();
        _;
    }

    /**
     * @dev Use to assure that the call is coming from the strategies management.
     */
    modifier onlyManagement() {
        TokenizedStrategy.requireManagement(msg.sender);
        _;
    }

    /**
     * @dev Use to assure that the call is coming from either the strategies
     * management or the keeper.
     */
    modifier onlyKeepers() {
        TokenizedStrategy.requireKeeperOrManagement(msg.sender);
        _;
    }

    /**
     * @dev Use to assure that the call is coming from either the strategies
     * management or the emergency admin.
     */
    modifier onlyEmergencyAuthorized() {
        TokenizedStrategy.requireEmergencyAuthorized(msg.sender);
        _;
    }

    /**
     * @dev Require that the msg.sender is this address.
     */
    function _onlySelf() internal view {
        require(msg.sender == address(this), "!self");
    }

    /*//////////////////////////////////////////////////////////////
                            CONSTANTS
    //////////////////////////////////////////////////////////////*/

    /**
     * @dev This is the address of the TokenizedStrategy implementation
     * contract that will be used by all strategies to handle the
     * accounting, logic, storage etc.
     *
     * Any external calls to the that don't hit one of the functions
     * defined in this base or the strategy will end up being forwarded
     * through the fallback function, which will delegateCall this address.
     *
     * This address should be the same for every strategy, never be adjusted
     * and always be checked before any integration with the Strategy.
     */
    address public constant tokenizedStrategyAddress =
        0xD377919FA87120584B21279a491F82D5265A139c;

    /*//////////////////////////////////////////////////////////////
                            IMMUTABLES
    //////////////////////////////////////////////////////////////*/

    /**
     * @dev Underlying asset the Strategy is earning yield on.
     * Stored here for cheap retrievals within the strategy.
     */
    ERC20 internal immutable asset;

    /**
     * @dev This variable is set to address(this) during initialization of each strategy.
     *
     * This can be used to retrieve storage data within the strategy
     * contract as if it were a linked library.
     *
     *       i.e. uint256 totalAssets = TokenizedStrategy.totalAssets()
     *
     * Using address(this) will mean any calls using this variable will lead
     * to a call to itself. Which will hit the fallback function and
     * delegateCall that to the actual TokenizedStrategy.
     */
    ITokenizedStrategy internal immutable TokenizedStrategy;

    /**
     * @notice Used to initialize the strategy on deployment.
     *
     * This will set the `TokenizedStrategy` variable for easy
     * internal view calls to the implementation. As well as
     * initializing the default storage variables based on the
     * parameters and using the deployer for the permissioned roles.
     *
     * @param _asset Address of the underlying asset.
     * @param _name Name the strategy will use.
     */
    constructor(address _asset, string memory _name) {
        asset = ERC20(_asset);

        // Set instance of the implementation for internal use.
        TokenizedStrategy = ITokenizedStrategy(address(this));

        // Initialize the strategy's storage variables.
        _delegateCall(
            abi.encodeCall(
                ITokenizedStrategy.initialize,
                (_asset, _name, msg.sender, msg.sender, msg.sender)
            )
        );

        // Store the tokenizedStrategyAddress at the standard implementation
        // address storage slot so etherscan picks up the interface. This gets
        // stored on initialization and never updated.
        assembly {
            sstore(
                // keccak256('eip1967.proxy.implementation' - 1)
                0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc,
                tokenizedStrategyAddress
            )
        }
    }

    /*//////////////////////////////////////////////////////////////
                NEEDED TO BE OVERRIDDEN BY STRATEGIST
    //////////////////////////////////////////////////////////////*/

    /**
     * @dev Can deploy up to '_amount' of 'asset' in the yield source.
     *
     * This function is called at the end of a {deposit} or {mint}
     * call. Meaning that unless a whitelist is implemented it will
     * be entirely permissionless and thus can be sandwiched or otherwise
     * manipulated.
     *
     * @param _amount The amount of 'asset' that the strategy can attempt
     * to deposit in the yield source.
     */
    function _deployFunds(uint256 _amount) internal virtual;

    /**
     * @dev Should attempt to free the '_amount' of 'asset'.
     *
     * NOTE: The amount of 'asset' that is already loose has already
     * been accounted for.
     *
     * This function is called during {withdraw} and {redeem} calls.
     * Meaning that unless a whitelist is implemented it will be
     * entirely permissionless and thus can be sandwiched or otherwise
     * manipulated.
     *
     * Should not rely on asset.balanceOf(address(this)) calls other than
     * for diff accounting purposes.
     *
     * Any difference between `_amount` and what is actually freed will be
     * counted as a loss and passed on to the withdrawer. This means
     * care should be taken in times of illiquidity. It may be better to revert
     * if withdraws are simply illiquid so not to realize incorrect losses.
     *
     * @param _amount, The amount of 'asset' to be freed.
     */
    function _freeFunds(uint256 _amount) internal virtual;

    /**
     * @dev Internal function to harvest all rewards, redeploy any idle
     * funds and return an accurate accounting of all funds currently
     * held by the Strategy.
     *
     * This should do any needed harvesting, rewards selling, accrual,
     * redepositing etc. to get the most accurate view of current assets.
     *
     * NOTE: All applicable assets including loose assets should be
     * accounted for in this function.
     *
     * Care should be taken when relying on oracles or swap values rather
     * than actual amounts as all Strategy profit/loss accounting will
     * be done based on this returned value.
     *
     * This can still be called post a shutdown, a strategist can check
     * `TokenizedStrategy.isShutdown()` to decide if funds should be
     * redeployed or simply realize any profits/losses.
     *
     * @return _totalAssets A trusted and accurate account for the total
     * amount of 'asset' the strategy currently holds including idle funds.
     */
    function _harvestAndReport()
        internal
        virtual
        returns (uint256 _totalAssets);

    /*//////////////////////////////////////////////////////////////
                    OPTIONAL TO OVERRIDE BY STRATEGIST
    //////////////////////////////////////////////////////////////*/

    /**
     * @dev Optional function for strategist to override that can
     *  be called in between reports.
     *
     * If '_tend' is used tendTrigger() will also need to be overridden.
     *
     * This call can only be called by a permissioned role so may be
     * through protected relays.
     *
     * This can be used to harvest and compound rewards, deposit idle funds,
     * perform needed position maintenance or anything else that doesn't need
     * a full report for.
     *
     *   EX: A strategy that can not deposit funds without getting
     *       sandwiched can use the tend when a certain threshold
     *       of idle to totalAssets has been reached.
     *
     * This will have no effect on PPS of the strategy till report() is called.
     *
     * @param _totalIdle The current amount of idle funds that are available to deploy.
     */
    function _tend(uint256 _totalIdle) internal virtual {}

    /**
     * @dev Optional trigger to override if tend() will be used by the strategy.
     * This must be implemented if the strategy hopes to invoke _tend().
     *
     * @return . Should return true if tend() should be called by keeper or false if not.
     */
    function _tendTrigger() internal view virtual returns (bool) {
        return false;
    }

    /**
     * @notice Returns if tend() should be called by a keeper.
     *
     * @return . Should return true if tend() should be called by keeper or false if not.
     * @return . Calldata for the tend call.
     */
    function tendTrigger() external view virtual returns (bool, bytes memory) {
        return (
            // Return the status of the tend trigger.
            _tendTrigger(),
            // And the needed calldata either way.
            abi.encodeWithSelector(ITokenizedStrategy.tend.selector)
        );
    }

    /**
     * @notice Gets the max amount of `asset` that an address can deposit.
     * @dev Defaults to an unlimited amount for any address. But can
     * be overridden by strategists.
     *
     * This function will be called before any deposit or mints to enforce
     * any limits desired by the strategist. This can be used for either a
     * traditional deposit limit or for implementing a whitelist etc.
     *
     *   EX:
     *      if(isAllowed[_owner]) return super.availableDepositLimit(_owner);
     *
     * This does not need to take into account any conversion rates
     * from shares to assets. But should know that any non max uint256
     * amounts may be converted to shares. So it is recommended to keep
     * custom amounts low enough as not to cause overflow when multiplied
     * by `totalSupply`.
     *
     * @param . The address that is depositing into the strategy.
     * @return . The available amount the `_owner` can deposit in terms of `asset`
     */
    function availableDepositLimit(
        address /*_owner*/
    ) public view virtual returns (uint256) {
        return type(uint256).max;
    }

    /**
     * @notice Gets the max amount of `asset` that can be withdrawn.
     * @dev Defaults to an unlimited amount for any address. But can
     * be overridden by strategists.
     *
     * This function will be called before any withdraw or redeem to enforce
     * any limits desired by the strategist. This can be used for illiquid
     * or sandwichable strategies. It should never be lower than `totalIdle`.
     *
     *   EX:
     *       return TokenIzedStrategy.totalIdle();
     *
     * This does not need to take into account the `_owner`'s share balance
     * or conversion rates from shares to assets.
     *
     * @param . The address that is withdrawing from the strategy.
     * @return . The available amount that can be withdrawn in terms of `asset`
     */
    function availableWithdrawLimit(
        address /*_owner*/
    ) public view virtual returns (uint256) {
        return type(uint256).max;
    }

    /**
     * @dev Optional function for a strategist to override that will
     * allow management to manually withdraw deployed funds from the
     * yield source if a strategy is shutdown.
     *
     * This should attempt to free `_amount`, noting that `_amount` may
     * be more than is currently deployed.
     *
     * NOTE: This will not realize any profits or losses. A separate
     * {report} will be needed in order to record any profit/loss. If
     * a report may need to be called after a shutdown it is important
     * to check if the strategy is shutdown during {_harvestAndReport}
     * so that it does not simply re-deploy all funds that had been freed.
     *
     * EX:
     *   if(freeAsset > 0 && !TokenizedStrategy.isShutdown()) {
     *       depositFunds...
     *    }
     *
     * @param _amount The amount of asset to attempt to free.
     */
    function _emergencyWithdraw(uint256 _amount) internal virtual {}

    /*//////////////////////////////////////////////////////////////
                        TokenizedStrategy HOOKS
    //////////////////////////////////////////////////////////////*/

    /**
     * @notice Can deploy up to '_amount' of 'asset' in yield source.
     * @dev Callback for the TokenizedStrategy to call during a {deposit}
     * or {mint} to tell the strategy it can deploy funds.
     *
     * Since this can only be called after a {deposit} or {mint}
     * delegateCall to the TokenizedStrategy msg.sender == address(this).
     *
     * Unless a whitelist is implemented this will be entirely permissionless
     * and thus can be sandwiched or otherwise manipulated.
     *
     * @param _amount The amount of 'asset' that the strategy can
     * attempt to deposit in the yield source.
     */
    function deployFunds(uint256 _amount) external virtual onlySelf {
        _deployFunds(_amount);
    }

    /**
     * @notice Should attempt to free the '_amount' of 'asset'.
     * @dev Callback for the TokenizedStrategy to call during a withdraw
     * or redeem to free the needed funds to service the withdraw.
     *
     * This can only be called after a 'withdraw' or 'redeem' delegateCall
     * to the TokenizedStrategy so msg.sender == address(this).
     *
     * @param _amount The amount of 'asset' that the strategy should attempt to free up.
     */
    function freeFunds(uint256 _amount) external virtual onlySelf {
        _freeFunds(_amount);
    }

    /**
     * @notice Returns the accurate amount of all funds currently
     * held by the Strategy.
     * @dev Callback for the TokenizedStrategy to call during a report to
     * get an accurate accounting of assets the strategy controls.
     *
     * This can only be called after a report() delegateCall to the
     * TokenizedStrategy so msg.sender == address(this).
     *
     * @return . A trusted and accurate account for the total amount
     * of 'asset' the strategy currently holds including idle funds.
     */
    function harvestAndReport() external virtual onlySelf returns (uint256) {
        return _harvestAndReport();
    }

    /**
     * @notice Will call the internal '_tend' when a keeper tends the strategy.
     * @dev Callback for the TokenizedStrategy to initiate a _tend call in the strategy.
     *
     * This can only be called after a tend() delegateCall to the TokenizedStrategy
     * so msg.sender == address(this).
     *
     * We name the function `tendThis` so that `tend` calls are forwarded to
     * the TokenizedStrategy.

     * @param _totalIdle The amount of current idle funds that can be
     * deployed during the tend
     */
    function tendThis(uint256 _totalIdle) external virtual onlySelf {
        _tend(_totalIdle);
    }

    /**
     * @notice Will call the internal '_emergencyWithdraw' function.
     * @dev Callback for the TokenizedStrategy during an emergency withdraw.
     *
     * This can only be called after a emergencyWithdraw() delegateCall to
     * the TokenizedStrategy so msg.sender == address(this).
     *
     * We name the function `shutdownWithdraw` so that `emergencyWithdraw`
     * calls are forwarded to the TokenizedStrategy.
     *
     * @param _amount The amount of asset to attempt to free.
     */
    function shutdownWithdraw(uint256 _amount) external virtual onlySelf {
        _emergencyWithdraw(_amount);
    }

    /**
     * @dev Function used to delegate call the TokenizedStrategy with
     * certain `_calldata` and return any return values.
     *
     * This is used to setup the initial storage of the strategy, and
     * can be used by strategist to forward any other call to the
     * TokenizedStrategy implementation.
     *
     * @param _calldata The abi encoded calldata to use in delegatecall.
     * @return . The return value if the call was successful in bytes.
     */
    function _delegateCall(
        bytes memory _calldata
    ) internal returns (bytes memory) {
        // Delegate call the tokenized strategy with provided calldata.
        (bool success, bytes memory result) = tokenizedStrategyAddress
            .delegatecall(_calldata);

        // If the call reverted. Return the error.
        if (!success) {
            assembly {
                let ptr := mload(0x40)
                let size := returndatasize()
                returndatacopy(ptr, 0, size)
                revert(ptr, size)
            }
        }

        // Return the result.
        return result;
    }

    /**
     * @dev Execute a function on the TokenizedStrategy and return any value.
     *
     * This fallback function will be executed when any of the standard functions
     * defined in the TokenizedStrategy are called since they wont be defined in
     * this contract.
     *
     * It will delegatecall the TokenizedStrategy implementation with the exact
     * calldata and return any relevant values.
     *
     */
    fallback() external {
        // load our target address
        address _tokenizedStrategyAddress = tokenizedStrategyAddress;
        // Execute external function using delegatecall and return any value.
        assembly {
            // Copy function selector and any arguments.
            calldatacopy(0, 0, calldatasize())
            // Execute function delegatecall.
            let result := delegatecall(
                gas(),
                _tokenizedStrategyAddress,
                0,
                calldatasize(),
                0,
                0
            )
            // Get any return value
            returndatacopy(0, 0, returndatasize())
            // Return any return value or error back to the caller
            switch result
            case 0 {
                revert(0, returndatasize())
            }
            default {
                return(0, returndatasize())
            }
        }
    }
}

// SPDX-License-Identifier: AGPL-3.0
pragma solidity 0.8.28;

import {ERC20} from "@openzeppelin/contracts/token/ERC20/ERC20.sol";

/// @notice This contract is used to access the storage of TokenizedStrategy variables
/// that are not directly accessible from the strategy contract.
/// The contract duplicates the struct and data from the original TokenizedStrategy contract
/// to expose the `nonReentrant` modifier.
contract TokenizedStrategyStorageAccess {
    /*//////////////////////////////////////////////////////////////
                        STORAGE STRUCT
    //////////////////////////////////////////////////////////////*/

    /**
     * @dev The struct that will hold all the storage data for each strategy
     * that uses this implementation.
     *
     * This replaces all state variables for a traditional contract. This
     * full struct will be initialized on the creation of the strategy
     * and continually updated and read from for the life of the contract.
     *
     * We combine all the variables into one struct to limit the amount of
     * times the custom storage slots need to be loaded during complex functions.
     *
     * Loading the corresponding storage slot for the struct does not
     * load any of the contents of the struct into memory. So the size
     * will not increase memory related gas usage.
     */
    // prettier-ignore
    struct StrategyData {
        // The ERC20 compliant underlying asset that will be
        // used by the Strategy
        ERC20 asset;


        // These are the corresponding ERC20 variables needed for the
        // strategies token that is issued and burned on each deposit or withdraw.
        uint8 decimals; // The amount of decimals that `asset` and strategy use.
        string name; // The name of the token for the strategy.
        uint256 totalSupply; // The total amount of shares currently issued.
        mapping(address => uint256) nonces; // Mapping of nonces used for permit functions.
        mapping(address => uint256) balances; // Mapping to track current balances for each account that holds shares.
        mapping(address => mapping(address => uint256)) allowances; // Mapping to track the allowances for the strategies shares.


        // We manually track `totalAssets` to prevent PPS manipulation through airdrops.
        uint256 totalAssets;


        // Variables for profit reporting and locking.
        // We use uint96 for timestamps to fit in the same slot as an address. That overflows in 2.5e+21 years.
        // I know Yearn moves slowly but surely V4 will be out by then.
        // If the timestamps ever overflow tell the cyborgs still using this code I'm sorry for being cheap.
        uint256 profitUnlockingRate; // The rate at which locked profit is unlocking.
        uint96 fullProfitUnlockDate; // The timestamp at which all locked shares will unlock.
        address keeper; // Address given permission to call {report} and {tend}.
        uint32 profitMaxUnlockTime; // The amount of seconds that the reported profit unlocks over.
        uint16 performanceFee; // The percent in basis points of profit that is charged as a fee.
        address performanceFeeRecipient; // The address to pay the `performanceFee` to.
        uint96 lastReport; // The last time a {report} was called.


        // Access management variables.
        address management; // Main address that can set all configurable variables.
        address pendingManagement; // Address that is pending to take over `management`.
        address emergencyAdmin; // Address to act in emergencies as well as `management`.

        // Strategy Status
        uint8 entered; // To prevent reentrancy. Use uint8 for gas savings.
        bool shutdown; // Bool that can be used to stop deposits into the strategy.
    }

    /*//////////////////////////////////////////////////////////////
                            MODIFIERS
    //////////////////////////////////////////////////////////////*/

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Placed over all state changing functions for increased safety.
     */
    modifier nonReentrant() {
        StrategyData storage S = _strategyStorage();

        // On the first call to nonReentrant, `entered` will be false (2)
        // Modified from the original Yearn implementation (Original implementation checks that `S.entered != ENTERED`)
        // The change below checks reentrancy, and also validates that the storage slot is correct.
        // With the original Yearn check, if the storage slot was not correct, it would bypass the check as the value would be the default value of 0.
        // This ensures that the storage slot is correct and that the reentrancy check is valid.
        require(S.entered == NOT_ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        S.entered = ENTERED;

        _;

        // Reset to false (1) once call has finished.
        S.entered = NOT_ENTERED;
    }

    /*//////////////////////////////////////////////////////////////
                               CONSTANTS
    //////////////////////////////////////////////////////////////*/

    /// @notice API version this TokenizedStrategy implements.
    string internal constant API_VERSION = "3.0.4";

    /// @notice Value to set the `entered` flag to during a call.
    uint8 internal constant ENTERED = 2;
    /// @notice Value to set the `entered` flag to at the end of the call.
    uint8 internal constant NOT_ENTERED = 1;

    /**
     * @dev Custom storage slot that will be used to store the
     * `StrategyData` struct that holds each strategies
     * specific storage variables.
     *
     * Any storage updates done by the TokenizedStrategy actually update
     * the storage of the calling contract. This variable points
     * to the specific location that will be used to store the
     * struct that holds all that data.
     *
     * We use a custom string in order to get a random
     * storage slot that will allow for strategists to use any
     * amount of storage in their strategy without worrying
     * about collisions.
     */
    bytes32 internal constant BASE_STRATEGY_STORAGE = bytes32(uint256(keccak256("yearn.base.strategy.storage")) - 1);

    /*//////////////////////////////////////////////////////////////
                            STORAGE GETTER
    //////////////////////////////////////////////////////////////*/

    /**
     * @dev will return the actual storage slot where the strategy
     * specific `StrategyData` struct is stored for both read
     * and write operations.
     *
     * This loads just the slot location, not the full struct
     * so it can be used in a gas efficient manner.
     */
    function _strategyStorage() internal pure returns (StrategyData storage S) {
        // Since STORAGE_SLOT is a constant, we have to put a variable
        // on the stack to access it from an inline assembly block.
        bytes32 slot = BASE_STRATEGY_STORAGE;
        assembly {
            S.slot := slot
        }
    }
}

// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";
import "./IPPrincipalToken.sol";
import "./IPYieldToken.sol";
import "./IStandardizedYield.sol";
import "./IPGauge.sol";
import "../core/Market/MarketMathCore.sol";

interface IPMarket is IERC20Metadata, IPGauge {
    event Mint(address indexed receiver, uint256 netLpMinted, uint256 netSyUsed, uint256 netPtUsed);

    event Burn(
        address indexed receiverSy,
        address indexed receiverPt,
        uint256 netLpBurned,
        uint256 netSyOut,
        uint256 netPtOut
    );

    event Swap(
        address indexed caller,
        address indexed receiver,
        int256 netPtOut,
        int256 netSyOut,
        uint256 netSyFee,
        uint256 netSyToReserve
    );

    event UpdateImpliedRate(uint256 indexed timestamp, uint256 lnLastImpliedRate);

    event IncreaseObservationCardinalityNext(
        uint16 observationCardinalityNextOld,
        uint16 observationCardinalityNextNew
    );

    function mint(
        address receiver,
        uint256 netSyDesired,
        uint256 netPtDesired
    ) external returns (uint256 netLpOut, uint256 netSyUsed, uint256 netPtUsed);

    function burn(
        address receiverSy,
        address receiverPt,
        uint256 netLpToBurn
    ) external returns (uint256 netSyOut, uint256 netPtOut);

    function swapExactPtForSy(
        address receiver,
        uint256 exactPtIn,
        bytes calldata data
    ) external returns (uint256 netSyOut, uint256 netSyFee);

    function swapSyForExactPt(
        address receiver,
        uint256 exactPtOut,
        bytes calldata data
    ) external returns (uint256 netSyIn, uint256 netSyFee);

    function redeemRewards(address user) external returns (uint256[] memory);

    function readState(address router) external view returns (MarketState memory market);

    function observe(uint32[] memory secondsAgos) external view returns (uint216[] memory lnImpliedRateCumulative);

    function increaseObservationsCardinalityNext(uint16 cardinalityNext) external;

    function readTokens() external view returns (IStandardizedYield _SY, IPPrincipalToken _PT, IPYieldToken _YT);

    function getRewardTokens() external view returns (address[] memory);

    function isExpired() external view returns (bool);

    function expiry() external view returns (uint256);

    function observations(
        uint256 index
    ) external view returns (uint32 blockTimestamp, uint216 lnImpliedRateCumulative, bool initialized);

    function _storage()
        external
        view
        returns (
            int128 totalPt,
            int128 totalSy,
            uint96 lastLnImpliedRate,
            uint16 observationIndex,
            uint16 observationCardinality,
            uint16 observationCardinalityNext
        );
}

// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.0;

import "../../interfaces/IPMarket.sol";
import "../../core/libraries/math/PMath.sol";

// This library can & should be integrated directly for optimal gas usage.
// If you prefer not to integrate it directly, the PendlePtOracle contract (a pre-deployed version of this contract) can be used.
library PendlePYOracleLib {
    using PMath for uint256;
    using PMath for int256;

    /**
     * This function returns the twap rate PT/Asset on market, but take into account the current rate of SY
     This is to account for special cases where underlying asset becomes insolvent and has decreasing exchangeRate
     * @param market market to get rate from
     * @param duration twap duration
     */
    function getPtToAssetRate(IPMarket market, uint32 duration) internal view returns (uint256) {
        (uint256 syIndex, uint256 pyIndex) = getSYandPYIndexCurrent(market);
        if (syIndex >= pyIndex) {
            return getPtToAssetRateRaw(market, duration);
        } else {
            return (getPtToAssetRateRaw(market, duration) * syIndex) / pyIndex;
        }
    }

    /**
     * This function returns the twap rate YT/Asset on market, but take into account the current rate of SY
     This is to account for special cases where underlying asset becomes insolvent and has decreasing exchangeRate
     * @param market market to get rate from
     * @param duration twap duration
     */
    function getYtToAssetRate(IPMarket market, uint32 duration) internal view returns (uint256) {
        (uint256 syIndex, uint256 pyIndex) = getSYandPYIndexCurrent(market);
        if (syIndex >= pyIndex) {
            return getYtToAssetRateRaw(market, duration);
        } else {
            return (getYtToAssetRateRaw(market, duration) * syIndex) / pyIndex;
        }
    }

    /// @notice Similar to getPtToAsset but returns the rate in SY instead
    function getPtToSyRate(IPMarket market, uint32 duration) internal view returns (uint256) {
        (uint256 syIndex, uint256 pyIndex) = getSYandPYIndexCurrent(market);
        if (syIndex >= pyIndex) {
            return getPtToAssetRateRaw(market, duration).divDown(syIndex);
        } else {
            return getPtToAssetRateRaw(market, duration).divDown(pyIndex);
        }
    }

    /// @notice Similar to getPtToAsset but returns the rate in SY instead
    function getYtToSyRate(IPMarket market, uint32 duration) internal view returns (uint256) {
        (uint256 syIndex, uint256 pyIndex) = getSYandPYIndexCurrent(market);
        if (syIndex >= pyIndex) {
            return getYtToAssetRateRaw(market, duration).divDown(syIndex);
        } else {
            return getYtToAssetRateRaw(market, duration).divDown(pyIndex);
        }
    }

    /// @notice returns the raw rate without taking into account whether SY is solvent
    function getPtToAssetRateRaw(IPMarket market, uint32 duration) internal view returns (uint256) {
        uint256 expiry = market.expiry();

        if (expiry <= block.timestamp) {
            return PMath.ONE;
        } else {
            uint256 lnImpliedRate = getMarketLnImpliedRate(market, duration);
            uint256 timeToExpiry = expiry - block.timestamp;
            uint256 assetToPtRate = MarketMathCore._getExchangeRateFromImpliedRate(lnImpliedRate, timeToExpiry).Uint();
            return PMath.ONE.divDown(assetToPtRate);
        }
    }

    /// @notice returns the raw rate without taking into account whether SY is solvent
    function getYtToAssetRateRaw(IPMarket market, uint32 duration) internal view returns (uint256) {
        return PMath.ONE - getPtToAssetRateRaw(market, duration);
    }

    function getSYandPYIndexCurrent(IPMarket market) internal view returns (uint256 syIndex, uint256 pyIndex) {
        (IStandardizedYield SY, , IPYieldToken YT) = market.readTokens();

        syIndex = SY.exchangeRate();
        uint256 pyIndexStored = YT.pyIndexStored();

        if (YT.doCacheIndexSameBlock() && YT.pyIndexLastUpdatedBlock() == block.number) {
            pyIndex = pyIndexStored;
        } else {
            pyIndex = PMath.max(syIndex, pyIndexStored);
        }
    }

    function getMarketLnImpliedRate(IPMarket market, uint32 duration) internal view returns (uint256) {
        if (duration == 0) {
            (, , uint96 lnImpliedRate, , , ) = IPMarket(market)._storage();
            return uint256(lnImpliedRate);
        }

        uint32[] memory durations = new uint32[](2);
        durations[0] = duration;

        uint216[] memory lnImpliedRateCumulative = market.observe(durations);
        return (lnImpliedRateCumulative[1] - lnImpliedRateCumulative[0]) / duration;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.5.0;

import {IERC4626, IERC20, IERC20Metadata} from "openzeppelin5/interfaces/IERC4626.sol";

import {IERC3156FlashLender} from "./IERC3156FlashLender.sol";
import {ISiloConfig} from "./ISiloConfig.sol";
import {ISiloFactory} from "./ISiloFactory.sol";

import {IHookReceiver} from "./IHookReceiver.sol";

// solhint-disable ordering
interface ISilo is IERC20, IERC4626, IERC3156FlashLender {
    /// @dev Interest accrual happens on each deposit/withdraw/borrow/repay. View methods work on storage that might be
    ///      outdate. Some calculations require accrued interest to return current state of Silo. This struct is used
    ///      to make a decision inside functions if interest should be accrued in memory to work on updated values.
    enum AccrueInterestInMemory {
        No,
        Yes
    }

    /// @dev Silo has two separate oracles for solvency and maxLtv calculations. MaxLtv oracle is optional. Solvency
    ///      oracle can also be optional if asset is used as denominator in Silo config. For example, in ETH/USDC Silo
    ///      one could setup only solvency oracle for ETH that returns price in USDC. Then USDC does not need an oracle
    ///      because it's used as denominator for ETH and it's "price" can be assume as 1.
    enum OracleType {
        Solvency,
        MaxLtv
    }

    /// @dev There are 3 types of accounting in the system: for non-borrowable collateral deposit called "protected",
    ///      for borrowable collateral deposit called "collateral" and for borrowed tokens called "debt". System does
    ///      identical calculations for each type of accounting but it uses different data. To avoid code duplication
    ///      this enum is used to decide which data should be read.
    enum AssetType {
        Protected, // default
        Collateral,
        Debt
    }

    /// @dev There are 2 types of accounting in the system: for non-borrowable collateral deposit called "protected" and
    ///      for borrowable collateral deposit called "collateral". System does
    ///      identical calculations for each type of accounting but it uses different data. To avoid code duplication
    ///      this enum is used to decide which data should be read.
    enum CollateralType {
        Protected, // default
        Collateral
    }

    /// @dev Types of calls that can be made by the hook receiver on behalf of Silo via `callOnBehalfOfSilo` fn
    enum CallType {
        Call, // default
        Delegatecall
    }

    /// @param _assets Amount of assets the user wishes to withdraw. Use 0 if shares are provided.
    /// @param _shares Shares the user wishes to burn in exchange for the withdrawal. Use 0 if assets are provided.
    /// @param _receiver Address receiving the withdrawn assets
    /// @param _owner Address of the owner of the shares being burned
    /// @param _spender Address executing the withdrawal; may be different than `_owner` if an allowance was set
    /// @param _collateralType Type of the asset being withdrawn (Collateral or Protected)
    struct WithdrawArgs {
        uint256 assets;
        uint256 shares;
        address receiver;
        address owner;
        address spender;
        ISilo.CollateralType collateralType;
    }

    /// @param assets Number of assets the borrower intends to borrow. Use 0 if shares are provided.
    /// @param shares Number of shares corresponding to the assets that the borrower intends to borrow. Use 0 if
    /// assets are provided.
    /// @param receiver Address that will receive the borrowed assets
    /// @param borrower The user who is borrowing the assets
    struct BorrowArgs {
        uint256 assets;
        uint256 shares;
        address receiver;
        address borrower;
    }

    /// @param shares Amount of shares the user wishes to transit.
    /// @param owner owner of the shares after transition.
    /// @param transitionFrom type of collateral that will be transitioned.
    struct TransitionCollateralArgs {
        uint256 shares;
        address owner;
        ISilo.CollateralType transitionFrom;
    }

    struct UtilizationData {
        /// @dev COLLATERAL: Amount of asset token that has been deposited to Silo plus interest earned by depositors.
        /// It also includes token amount that has been borrowed.
        uint256 collateralAssets;
        /// @dev DEBT: Amount of asset token that has been borrowed plus accrued interest.
        uint256 debtAssets;
        /// @dev timestamp of the last interest accrual
        uint64 interestRateTimestamp;
    }

    /// @dev Interest and revenue may be rounded down to zero if the underlying token's decimal is low.
    /// Because of that, we need to store fractions for further calculation to minimize losses.
    struct Fractions {
        /// @dev interest value that we could not convert to full token in 36 decimals, max value for it is 1e18.
        /// this value was not yet apply as interest for borrowers
        uint64 interest;
        /// @dev revenue value that we could not convert to full token in 36 decimals, max value for it is 1e18.
        uint64 revenue;
    }

    struct SiloStorage {
        /// @param daoAndDeployerRevenue Current amount of assets (fees) accrued by DAO and Deployer
        /// but not yet withdrawn
        uint192 daoAndDeployerRevenue;
        /// @dev timestamp of the last interest accrual
        uint64 interestRateTimestamp;
        /// @dev Interest and revenue fractions for more precise calculations
        Fractions fractions;

        /// @dev silo is just for one asset,
        /// but this one asset can be of three types: mapping key is uint256(AssetType), so we store `assets` by type.
        /// Assets based on type:
        /// - PROTECTED COLLATERAL: Amount of asset token that has been deposited to Silo that can be ONLY used
        /// as collateral. These deposits do NOT earn interest and CANNOT be borrowed.
        /// - COLLATERAL: Amount of asset token that has been deposited to Silo plus interest earned by depositors.
        /// It also includes token amount that has been borrowed.
        /// - DEBT: Amount of asset token that has been borrowed plus accrued interest.
        /// `totalAssets` can have outdated value (without interest), if you doing view call (of off-chain call)
        /// please use getters eg `getCollateralAssets()` to fetch value that includes interest.
        mapping(AssetType assetType => uint256 assets) totalAssets;
    }

    /// @notice Emitted on protected deposit
    /// @param sender wallet address that deposited asset
    /// @param owner wallet address that received shares in Silo
    /// @param assets amount of asset that was deposited
    /// @param shares amount of shares that was minted
    event DepositProtected(address indexed sender, address indexed owner, uint256 assets, uint256 shares);

    /// @notice Emitted on protected withdraw
    /// @param sender wallet address that sent transaction
    /// @param receiver wallet address that received asset
    /// @param owner wallet address that owned asset
    /// @param assets amount of asset that was withdrew
    /// @param shares amount of shares that was burn
    event WithdrawProtected(
        address indexed sender, address indexed receiver, address indexed owner, uint256 assets, uint256 shares
    );

    /// @notice Emitted on borrow
    /// @param sender wallet address that sent transaction
    /// @param receiver wallet address that received asset
    /// @param owner wallet address that owes assets
    /// @param assets amount of asset that was borrowed
    /// @param shares amount of shares that was minted
    event Borrow(
        address indexed sender, address indexed receiver, address indexed owner, uint256 assets, uint256 shares
    );

    /// @notice Emitted on repayment
    /// @param sender wallet address that repaid asset
    /// @param owner wallet address that owed asset
    /// @param assets amount of asset that was repaid
    /// @param shares amount of shares that was burn
    event Repay(address indexed sender, address indexed owner, uint256 assets, uint256 shares);

    /// @notice emitted only when collateral has been switched to other one
    event CollateralTypeChanged(address indexed borrower);

    event HooksUpdated(uint24 hooksBefore, uint24 hooksAfter);

    event AccruedInterest(uint256 hooksBefore);

    event FlashLoan(uint256 amount);

    event WithdrawnFees(uint256 daoFees, uint256 deployerFees, bool redirectedDeployerFees);

    event DeployerFeesRedirected(uint256 deployerFees);

    error UnsupportedFlashloanToken();
    error FlashloanAmountTooBig();
    error NothingToWithdraw();
    error ProtectedProtection();
    error NotEnoughLiquidity();
    error NotSolvent();
    error BorrowNotPossible();
    error EarnedZero();
    error FlashloanFailed();
    error AboveMaxLtv();
    error SiloInitialized();
    error OnlyHookReceiver();
    error NoLiquidity();
    error InputCanBeAssetsOrShares();
    error CollateralSiloAlreadySet();
    error RepayTooHigh();
    error ZeroAmount();
    error InputZeroShares();
    error ReturnZeroAssets();
    error ReturnZeroShares();

    /// @return siloFactory The associated factory of the silo
    function factory() external view returns (ISiloFactory siloFactory);

    /// @notice Method for HookReceiver only to call on behalf of Silo
    /// @param _target address of the contract to call
    /// @param _value amount of ETH to send
    /// @param _callType type of the call (Call or Delegatecall)
    /// @param _input calldata for the call
    function callOnBehalfOfSilo(address _target, uint256 _value, CallType _callType, bytes calldata _input)
        external
        payable
        returns (bool success, bytes memory result);

    /// @notice Initialize Silo
    /// @param _siloConfig address of ISiloConfig with full config for this Silo
    function initialize(ISiloConfig _siloConfig) external;

    /// @notice Update hooks configuration for Silo
    /// @dev This function must be called after the hooks configuration is changed in the hook receiver
    function updateHooks() external;

    /// @notice Fetches the silo configuration contract
    /// @return siloConfig Address of the configuration contract associated with the silo
    function config() external view returns (ISiloConfig siloConfig);

    /// @notice Fetches the utilization data of the silo used by IRM
    function utilizationData() external view returns (UtilizationData memory utilizationData);

    /// @notice Fetches the real (available to borrow) liquidity in the silo, it does include interest
    /// @return liquidity The amount of liquidity
    function getLiquidity() external view returns (uint256 liquidity);

    /// @notice Determines if a borrower is solvent
    /// @param _borrower Address of the borrower to check for solvency
    /// @return True if the borrower is solvent, otherwise false
    function isSolvent(address _borrower) external view returns (bool);

    /// @notice Retrieves the raw total amount of assets based on provided type (direct storage access)
    function getTotalAssetsStorage(AssetType _assetType) external view returns (uint256);

    /// @notice Direct storage access to silo storage
    /// @dev See struct `SiloStorage` for more details
    function getSiloStorage()
        external
        view
        returns (
            uint192 daoAndDeployerRevenue,
            uint64 interestRateTimestamp,
            uint256 protectedAssets,
            uint256 collateralAssets,
            uint256 debtAssets
        );

    /// @notice Direct access to silo storage fractions variables
    function getFractionsStorage() external view returns (Fractions memory fractions);

    /// @notice Retrieves the total amount of collateral (borrowable) assets with interest
    /// @return totalCollateralAssets The total amount of assets of type 'Collateral'
    function getCollateralAssets() external view returns (uint256 totalCollateralAssets);

    /// @notice Retrieves the total amount of debt assets with interest
    /// @return totalDebtAssets The total amount of assets of type 'Debt'
    function getDebtAssets() external view returns (uint256 totalDebtAssets);

    /// @notice Retrieves the total amounts of collateral and protected (non-borrowable) assets
    /// @return totalCollateralAssets The total amount of assets of type 'Collateral'
    /// @return totalProtectedAssets The total amount of protected (non-borrowable) assets
    function getCollateralAndProtectedTotalsStorage()
        external
        view
        returns (uint256 totalCollateralAssets, uint256 totalProtectedAssets);

    /// @notice Retrieves the total amounts of collateral and debt assets
    /// @return totalCollateralAssets The total amount of assets of type 'Collateral'
    /// @return totalDebtAssets The total amount of debt assets of type 'Debt'
    function getCollateralAndDebtTotalsStorage()
        external
        view
        returns (uint256 totalCollateralAssets, uint256 totalDebtAssets);

    /// @notice Implements IERC4626.convertToShares for each asset type
    function convertToShares(uint256 _assets, AssetType _assetType) external view returns (uint256 shares);

    /// @notice Implements IERC4626.convertToAssets for each asset type
    function convertToAssets(uint256 _shares, AssetType _assetType) external view returns (uint256 assets);

    /// @notice Implements IERC4626.previewDeposit for protected (non-borrowable) collateral and collateral
    /// @dev Reverts for debt asset type
    function previewDeposit(uint256 _assets, CollateralType _collateralType) external view returns (uint256 shares);

    /// @notice Implements IERC4626.deposit for protected (non-borrowable) collateral and collateral
    /// @dev Reverts for debt asset type
    function deposit(uint256 _assets, address _receiver, CollateralType _collateralType)
        external
        returns (uint256 shares);

    /// @notice Implements IERC4626.previewMint for protected (non-borrowable) collateral and collateral
    /// @dev Reverts for debt asset type
    function previewMint(uint256 _shares, CollateralType _collateralType) external view returns (uint256 assets);

    /// @notice Implements IERC4626.mint for protected (non-borrowable) collateral and collateral
    /// @dev Reverts for debt asset type
    function mint(uint256 _shares, address _receiver, CollateralType _collateralType) external returns (uint256 assets);

    /// @notice Implements IERC4626.maxWithdraw for protected (non-borrowable) collateral and collateral
    /// @dev Reverts for debt asset type
    function maxWithdraw(address _owner, CollateralType _collateralType) external view returns (uint256 maxAssets);

    /// @notice Implements IERC4626.previewWithdraw for protected (non-borrowable) collateral and collateral
    /// @dev Reverts for debt asset type
    function previewWithdraw(uint256 _assets, CollateralType _collateralType) external view returns (uint256 shares);

    /// @notice Implements IERC4626.withdraw for protected (non-borrowable) collateral and collateral
    /// @dev Reverts for debt asset type
    function withdraw(uint256 _assets, address _receiver, address _owner, CollateralType _collateralType)
        external
        returns (uint256 shares);

    /// @notice Implements IERC4626.maxRedeem for protected (non-borrowable) collateral and collateral
    /// @dev Reverts for debt asset type
    function maxRedeem(address _owner, CollateralType _collateralType) external view returns (uint256 maxShares);

    /// @notice Implements IERC4626.previewRedeem for protected (non-borrowable) collateral and collateral
    /// @dev Reverts for debt asset type
    function previewRedeem(uint256 _shares, CollateralType _collateralType) external view returns (uint256 assets);

    /// @notice Implements IERC4626.redeem for protected (non-borrowable) collateral and collateral
    /// @dev Reverts for debt asset type
    function redeem(uint256 _shares, address _receiver, address _owner, CollateralType _collateralType)
        external
        returns (uint256 assets);

    /// @notice Calculates the maximum amount of assets that can be borrowed by the given address
    /// @param _borrower Address of the potential borrower
    /// @return maxAssets Maximum amount of assets that the borrower can borrow, this value is underestimated
    /// That means, in some cases when you borrow maxAssets, you will be able to borrow again eg. up to 2wei
    /// Reason for underestimation is to return value that will not cause borrow revert
    function maxBorrow(address _borrower) external view returns (uint256 maxAssets);

    /// @notice Previews the amount of shares equivalent to the given asset amount for borrowing
    /// @param _assets Amount of assets to preview the equivalent shares for
    /// @return shares Amount of shares equivalent to the provided asset amount
    function previewBorrow(uint256 _assets) external view returns (uint256 shares);

    /// @notice Allows an address to borrow a specified amount of assets
    /// @param _assets Amount of assets to borrow
    /// @param _receiver Address receiving the borrowed assets
    /// @param _borrower Address responsible for the borrowed assets
    /// @return shares Amount of shares equivalent to the borrowed assets
    function borrow(uint256 _assets, address _receiver, address _borrower)
        external returns (uint256 shares);

    /// @notice Calculates the maximum amount of shares that can be borrowed by the given address
    /// @param _borrower Address of the potential borrower
    /// @return maxShares Maximum number of shares that the borrower can borrow
    function maxBorrowShares(address _borrower) external view returns (uint256 maxShares);

    /// @notice Previews the amount of assets equivalent to the given share amount for borrowing
    /// @param _shares Amount of shares to preview the equivalent assets for
    /// @return assets Amount of assets equivalent to the provided share amount
    function previewBorrowShares(uint256 _shares) external view returns (uint256 assets);

    /// @notice Calculates the maximum amount of assets that can be borrowed by the given address
    /// @param _borrower Address of the potential borrower
    /// @return maxAssets Maximum amount of assets that the borrower can borrow, this value is underestimated
    /// That means, in some cases when you borrow maxAssets, you will be able to borrow again eg. up to 2wei
    /// Reason for underestimation is to return value that will not cause borrow revert
    function maxBorrowSameAsset(address _borrower) external view returns (uint256 maxAssets);

    /// @notice Allows an address to borrow a specified amount of assets that will be back up with deposit made with the
    /// same asset
    /// @param _assets Amount of assets to borrow
    /// @param _receiver Address receiving the borrowed assets
    /// @param _borrower Address responsible for the borrowed assets
    /// @return shares Amount of shares equivalent to the borrowed assets
    function borrowSameAsset(uint256 _assets, address _receiver, address _borrower)
        external returns (uint256 shares);

    /// @notice Allows a user to borrow assets based on the provided share amount
    /// @param _shares Amount of shares to borrow against
    /// @param _receiver Address to receive the borrowed assets
    /// @param _borrower Address responsible for the borrowed assets
    /// @return assets Amount of assets borrowed
    function borrowShares(uint256 _shares, address _receiver, address _borrower)
        external
        returns (uint256 assets);

    /// @notice Calculates the maximum amount an address can repay based on their debt shares
    /// @param _borrower Address of the borrower
    /// @return assets Maximum amount of assets the borrower can repay
    function maxRepay(address _borrower) external view returns (uint256 assets);

    /// @notice Provides an estimation of the number of shares equivalent to a given asset amount for repayment
    /// @param _assets Amount of assets to be repaid
    /// @return shares Estimated number of shares equivalent to the provided asset amount
    function previewRepay(uint256 _assets) external view returns (uint256 shares);

    /// @notice Repays a given asset amount and returns the equivalent number of shares
    /// @param _assets Amount of assets to be repaid
    /// @param _borrower Address of the borrower whose debt is being repaid
    /// @return shares The equivalent number of shares for the provided asset amount
    function repay(uint256 _assets, address _borrower) external returns (uint256 shares);

    /// @notice Calculates the maximum number of shares that can be repaid for a given borrower
    /// @param _borrower Address of the borrower
    /// @return shares The maximum number of shares that can be repaid for the borrower
    function maxRepayShares(address _borrower) external view returns (uint256 shares);

    /// @notice Provides a preview of the equivalent assets for a given number of shares to repay
    /// @param _shares Number of shares to preview repayment for
    /// @return assets Equivalent assets for the provided shares
    function previewRepayShares(uint256 _shares) external view returns (uint256 assets);

    /// @notice Allows a user to repay a loan using shares instead of assets
    /// @param _shares The number of shares the borrower wants to repay with
    /// @param _borrower The address of the borrower for whom to repay the loan
    /// @return assets The equivalent assets amount for the provided shares
    function repayShares(uint256 _shares, address _borrower) external returns (uint256 assets);

    /// @notice Transitions assets between borrowable (collateral) and non-borrowable (protected) states
    /// @dev This function allows assets to move between collateral and protected (non-borrowable) states without
    /// leaving the protocol
    /// @param _shares Amount of shares to be transitioned
    /// @param _owner Owner of the assets being transitioned
    /// @param _transitionFrom Specifies if the transition is from collateral or protected assets
    /// @return assets Amount of assets transitioned
    function transitionCollateral(uint256 _shares, address _owner, CollateralType _transitionFrom)
        external
        returns (uint256 assets);

    /// @notice Switches the collateral silo to this silo
    /// @dev Revert if the collateral silo is already set
    function switchCollateralToThisSilo() external;

    /// @notice Accrues interest for the asset and returns the accrued interest amount
    /// @return accruedInterest The total interest accrued during this operation
    function accrueInterest() external returns (uint256 accruedInterest);

    /// @notice only for SiloConfig
    function accrueInterestForConfig(
        address _interestRateModel,
        uint256 _daoFee,
        uint256 _deployerFee
    ) external;

    /// @notice Withdraws earned fees and distributes them to the DAO and deployer fee receivers
    function withdrawFees() external;
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.5.0;

interface ISiloOracle {
    /// @notice Hook function to call before `quote` function reads price
    /// @dev This hook function can be used to change state right before the price is read. For example it can be used
    ///      for curve read only reentrancy protection. In majority of implementations this will be an empty function.
    ///      WARNING: reverts are propagated to Silo so if `beforeQuote` reverts, Silo reverts as well.
    /// @param _baseToken Address of priced token
    function beforeQuote(address _baseToken) external;

    /// @return quoteAmount Returns quote price for _baseAmount of _baseToken
    /// @param _baseAmount Amount of priced token
    /// @param _baseToken Address of priced token
    function quote(uint256 _baseAmount, address _baseToken) external view returns (uint256 quoteAmount);

    /// @return address of token in which quote (price) is denominated
    function quoteToken() external view returns (address);
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.5.0;

import {ISilo} from "./ISilo.sol";
import {ICrossReentrancyGuard} from "./ICrossReentrancyGuard.sol";

interface ISiloConfig is ICrossReentrancyGuard {
    struct InitData {
        /// @notice Can be address zero if deployer fees are not to be collected. If deployer address is zero then
        /// deployer fee must be zero as well. Deployer will be minted an NFT that gives the right to claim deployer
        /// fees. NFT can be transferred with the right to claim.
        address deployer;

        /// @notice Address of the hook receiver called on every before/after action on Silo. Hook contract also
        /// implements liquidation logic and veSilo gauge connection.
        address hookReceiver;

        /// @notice Deployer's fee in 18 decimals points. Deployer will earn this fee based on the interest earned
        /// by the Silo. Max deployer fee is set by the DAO. At deployment it is 15%.
        uint256 deployerFee;

        /// @notice DAO's fee in 18 decimals points. DAO will earn this fee based on the interest earned
        /// by the Silo. Acceptable fee range fee is set by the DAO. Default at deployment is 5% - 50%.
        uint256 daoFee;

        /// @notice Address of the first token
        address token0;

        /// @notice Address of the solvency oracle. Solvency oracle is used to calculate LTV when deciding if borrower
        /// is solvent or should be liquidated. Solvency oracle is optional and if not set price of 1 will be assumed.
        address solvencyOracle0;

        /// @notice Address of the maxLtv oracle. Max LTV oracle is used to calculate LTV when deciding if borrower
        /// can borrow given amount of assets. Max LTV oracle is optional and if not set it defaults to solvency
        /// oracle. If neither is set price of 1 will be assumed.
        address maxLtvOracle0;

        /// @notice Address of the interest rate model
        address interestRateModel0;

        /// @notice Maximum LTV for first token. maxLTV is in 18 decimals points and is used to determine, if borrower
        /// can borrow given amount of assets. MaxLtv is in 18 decimals points. MaxLtv must be lower or equal to LT.
        uint256 maxLtv0;

        /// @notice Liquidation threshold for first token. LT is used to calculate solvency. LT is in 18 decimals
        /// points. LT must not be lower than maxLTV.
        uint256 lt0;

        /// @notice minimal acceptable LTV after liquidation, in 18 decimals points
        uint256 liquidationTargetLtv0;

        /// @notice Liquidation fee for the first token in 18 decimals points. Liquidation fee is what liquidator earns
        /// for repaying insolvent loan.
        uint256 liquidationFee0;

        /// @notice Flashloan fee sets the cost of taking a flashloan in 18 decimals points
        uint256 flashloanFee0;

        /// @notice Indicates if a beforeQuote on oracle contract should be called before quoting price
        bool callBeforeQuote0;

        /// @notice Address of the second token
        address token1;

        /// @notice Address of the solvency oracle. Solvency oracle is used to calculate LTV when deciding if borrower
        /// is solvent or should be liquidated. Solvency oracle is optional and if not set price of 1 will be assumed.
        address solvencyOracle1;

        /// @notice Address of the maxLtv oracle. Max LTV oracle is used to calculate LTV when deciding if borrower
        /// can borrow given amount of assets. Max LTV oracle is optional and if not set it defaults to solvency
        /// oracle. If neither is set price of 1 will be assumed.
        address maxLtvOracle1;

        /// @notice Address of the interest rate model
        address interestRateModel1;

        /// @notice Maximum LTV for first token. maxLTV is in 18 decimals points and is used to determine,
        /// if borrower can borrow given amount of assets. maxLtv is in 18 decimals points
        uint256 maxLtv1;

        /// @notice Liquidation threshold for first token. LT is used to calculate solvency. LT is in 18 decimals points
        uint256 lt1;

        /// @notice minimal acceptable LTV after liquidation, in 18 decimals points
        uint256 liquidationTargetLtv1;

        /// @notice Liquidation fee is what liquidator earns for repaying insolvent loan.
        uint256 liquidationFee1;

        /// @notice Flashloan fee sets the cost of taking a flashloan in 18 decimals points
        uint256 flashloanFee1;

        /// @notice Indicates if a beforeQuote on oracle contract should be called before quoting price
        bool callBeforeQuote1;
    }

    struct ConfigData {
        uint256 daoFee;
        uint256 deployerFee;
        address silo;
        address token;
        address protectedShareToken;
        address collateralShareToken;
        address debtShareToken;
        address solvencyOracle;
        address maxLtvOracle;
        address interestRateModel;
        uint256 maxLtv;
        uint256 lt;
        uint256 liquidationTargetLtv;
        uint256 liquidationFee;
        uint256 flashloanFee;
        address hookReceiver;
        bool callBeforeQuote;
    }

    struct DepositConfig {
        address silo;
        address token;
        address collateralShareToken;
        address protectedShareToken;
        uint256 daoFee;
        uint256 deployerFee;
        address interestRateModel;
    }

    error OnlySilo();
    error OnlySiloOrTokenOrHookReceiver();
    error WrongSilo();
    error OnlyDebtShareToken();
    error DebtExistInOtherSilo();
    error FeeTooHigh();

    /// @dev It should be called on debt transfer (debt share token transfer).
    /// In the case if the`_recipient` doesn't have configured a collateral silo,
    /// it will be set to the collateral silo of the `_sender`.
    /// @param _sender sender address
    /// @param _recipient recipient address
    function onDebtTransfer(address _sender, address _recipient) external;

    /// @notice Set collateral silo.
    /// @dev Revert if msg.sender is not a SILO_0 or SILO_1.
    /// @dev Always set collateral silo the same as msg.sender.
    /// @param _borrower borrower address
    /// @return collateralSiloChanged TRUE if collateral silo changed
    function setThisSiloAsCollateralSilo(address _borrower) external returns (bool collateralSiloChanged);

    /// @notice Set collateral silo
    /// @dev Revert if msg.sender is not a SILO_0 or SILO_1.
    /// @dev Always set collateral silo opposite to the msg.sender.
    /// @param _borrower borrower address
    /// @return collateralSiloChanged TRUE if collateral silo changed
    function setOtherSiloAsCollateralSilo(address _borrower) external returns (bool collateralSiloChanged);

    /// @notice Accrue interest for the silo
    /// @param _silo silo for which accrue interest
    function accrueInterestForSilo(address _silo) external;

    /// @notice Accrue interest for both silos (SILO_0 and SILO_1 in a config)
    function accrueInterestForBothSilos() external;

    /// @notice Retrieves the collateral silo for a specific borrower.
    /// @dev As a user can deposit into `Silo0` and `Silo1`, this property specifies which Silo
    /// will be used as collateral for the debt. Later on, it will be used for max LTV and solvency checks.
    /// After being set, the collateral silo is never set to `address(0)` again but such getters as
    /// `getConfigsForSolvency`, `getConfigsForBorrow`, `getConfigsForWithdraw` will return empty
    /// collateral silo config if borrower doesn't have debt.
    ///
    /// In the SiloConfig collateral silo is set by the following functions:
    /// `onDebtTransfer` - only if the recipient doesn't have collateral silo set (inherits it from the sender)
    /// This function is called on debt share token transfer (debt transfer).
    /// `setThisSiloAsCollateralSilo` - sets the same silo as the one that calls the function.
    /// `setOtherSiloAsCollateralSilo` - sets the opposite silo as collateral from the one that calls the function.
    ///
    /// In the Silo collateral silo is set by the following functions:
    /// `borrow` - always sets opposite silo as collateral.
    /// If Silo0 borrows, then Silo1 will be collateral and vice versa.
    /// `borrowSameAsset` - always sets the same silo as collateral.
    /// `switchCollateralToThisSilo` - always sets the same silo as collateral.
    /// @param _borrower The address of the borrower for which the collateral silo is being retrieved
    /// @return collateralSilo The address of the collateral silo for the specified borrower
    function borrowerCollateralSilo(address _borrower) external view returns (address collateralSilo);

    /// @notice Retrieves the silo ID
    /// @dev Each silo is assigned a unique ID. ERC-721 token is minted with identical ID to deployer.
    /// An owner of that token receives the deployer fees.
    /// @return siloId The ID of the silo
    function SILO_ID() external view returns (uint256 siloId); // solhint-disable-line func-name-mixedcase

    /// @notice Retrieves the addresses of the two silos
    /// @return silo0 The address of the first silo
    /// @return silo1 The address of the second silo
    function getSilos() external view returns (address silo0, address silo1);

    /// @notice Retrieves the asset associated with a specific silo
    /// @dev This function reverts for incorrect silo address input
    /// @param _silo The address of the silo for which the associated asset is being retrieved
    /// @return asset The address of the asset associated with the specified silo
    function getAssetForSilo(address _silo) external view returns (address asset);

    /// @notice Verifies if the borrower has debt in other silo by checking the debt share token balance
    /// @param _thisSilo The address of the silo in respect of which the debt is checked
    /// @param _borrower The address of the borrower for which the debt is checked
    /// @return hasDebt true if the borrower has debt in other silo
    function hasDebtInOtherSilo(address _thisSilo, address _borrower) external view returns (bool hasDebt);

    /// @notice Retrieves the debt silo associated with a specific borrower
    /// @dev This function reverts if debt present in two silo (should not happen)
    /// @param _borrower The address of the borrower for which the debt silo is being retrieved
    function getDebtSilo(address _borrower) external view returns (address debtSilo);

    /// @notice Retrieves configuration data for both silos. First config is for the silo that is asking for configs.
    /// @param borrower borrower address for which debtConfig will be returned
    /// @return collateralConfig The configuration data for collateral silo (empty if there is no debt).
    /// @return debtConfig The configuration data for debt silo (empty if there is no debt).
    function getConfigsForSolvency(address borrower)
        external
        view
        returns (ConfigData memory collateralConfig, ConfigData memory debtConfig);

    /// @notice Retrieves configuration data for a specific silo
    /// @dev This function reverts for incorrect silo address input.
    /// @param _silo The address of the silo for which configuration data is being retrieved
    /// @return config The configuration data for the specified silo
    function getConfig(address _silo) external view returns (ConfigData memory config);

    /// @notice Retrieves configuration data for a specific silo for withdraw fn.
    /// @dev This function reverts for incorrect silo address input.
    /// @param _silo The address of the silo for which configuration data is being retrieved
    /// @return depositConfig The configuration data for the specified silo (always config for `_silo`)
    /// @return collateralConfig The configuration data for the collateral silo (empty if there is no debt)
    /// @return debtConfig The configuration data for the debt silo (empty if there is no debt)
    function getConfigsForWithdraw(address _silo, address _borrower) external view returns (
        DepositConfig memory depositConfig,
        ConfigData memory collateralConfig,
        ConfigData memory debtConfig
    );

    /// @notice Retrieves configuration data for a specific silo for borrow fn.
    /// @dev This function reverts for incorrect silo address input.
    /// @param _debtSilo The address of the silo for which configuration data is being retrieved
    /// @return collateralConfig The configuration data for the collateral silo (always other than `_debtSilo`)
    /// @return debtConfig The configuration data for the debt silo (always config for `_debtSilo`)
    function getConfigsForBorrow(address _debtSilo)
        external
        view
        returns (ConfigData memory collateralConfig, ConfigData memory debtConfig);

    /// @notice Retrieves fee-related information for a specific silo
    /// @dev This function reverts for incorrect silo address input
    /// @param _silo The address of the silo for which fee-related information is being retrieved.
    /// @return daoFee The DAO fee percentage in 18 decimals points.
    /// @return deployerFee The deployer fee percentage in 18 decimals points.
    /// @return flashloanFee The flashloan fee percentage in 18 decimals points.
    /// @return asset The address of the asset associated with the specified silo.
    function getFeesWithAsset(address _silo)
        external
        view
        returns (uint256 daoFee, uint256 deployerFee, uint256 flashloanFee, address asset);

    /// @notice Retrieves share tokens associated with a specific silo
    /// @dev This function reverts for incorrect silo address input
    /// @param _silo The address of the silo for which share tokens are being retrieved
    /// @return protectedShareToken The address of the protected (non-borrowable) share token
    /// @return collateralShareToken The address of the collateral share token
    /// @return debtShareToken The address of the debt share token
    function getShareTokens(address _silo)
        external
        view
        returns (address protectedShareToken, address collateralShareToken, address debtShareToken);

    /// @notice Retrieves the share token and the silo token associated with a specific silo
    /// @param _silo The address of the silo for which the share token and silo token are being retrieved
    /// @param _collateralType The type of collateral
    /// @return shareToken The address of the share token (collateral or protected collateral)
    /// @return asset The address of the silo token
    function getCollateralShareTokenAndAsset(address _silo, ISilo.CollateralType _collateralType)
        external
        view
        returns (address shareToken, address asset);

    /// @notice Retrieves the share token and the silo token associated with a specific silo
    /// @param _silo The address of the silo for which the share token and silo token are being retrieved
    /// @return shareToken The address of the share token (debt)
    /// @return asset The address of the silo token
    function getDebtShareTokenAndAsset(address _silo)
        external
        view
        returns (address shareToken, address asset);
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.8.28;

import {Strings} from "openzeppelin5/utils/Strings.sol";
import {IERC20} from "openzeppelin5/token/ERC20/IERC20.sol";
import {Utils} from "silo-foundry-utils/lib/Utils.sol";

import {ISiloLens, ISilo} from "./interfaces/ISiloLens.sol";
import {IShareToken} from "./interfaces/IShareToken.sol";
import {ISiloConfig} from "./interfaces/ISiloConfig.sol";
import {IPartialLiquidation} from "./interfaces/IPartialLiquidation.sol";
import {IInterestRateModel} from "./interfaces/IInterestRateModel.sol";

import {SiloLensLib} from "./lib/SiloLensLib.sol";
import {SiloStdLib} from "./lib/SiloStdLib.sol";
import {IPartialLiquidation} from "./interfaces/IPartialLiquidation.sol";
import {IDistributionManager} from "silo-core/contracts/incentives/interfaces/IDistributionManager.sol";


/// @title SiloLens is a helper contract for integrations and UI
contract SiloLens is ISiloLens {
    uint256 internal constant _PRECISION_DECIMALS = 1e18;

    /// @inheritdoc ISiloLens
    function isSolvent(ISilo _silo, address _borrower) external view returns (bool) {
        return _silo.isSolvent(_borrower);
    }

    /// @inheritdoc ISiloLens
    function liquidity(ISilo _silo) external view returns (uint256) {
        return _silo.getLiquidity();
    }

    /// @inheritdoc ISiloLens
    function getRawLiquidity(ISilo _silo) external view virtual returns (uint256 liquidity) {
        return SiloLensLib.getRawLiquidity(_silo);
    }

    /// @inheritdoc ISiloLens
    function getMaxLtv(ISilo _silo) external view virtual returns (uint256 maxLtv) {
        return SiloLensLib.getMaxLtv(_silo);
    }

    /// @inheritdoc ISiloLens
    function getLt(ISilo _silo) external view virtual returns (uint256 lt) {
        lt = SiloLensLib.getLt(_silo);
    }

    /// @inheritdoc ISiloLens
    function getUserLT(ISilo _silo, address _borrower) external view returns (uint256 userLT) {
        return SiloLensLib.getUserLt(_silo, _borrower);
    }

    function getUsersLT(Borrower[] calldata _borrowers) external view returns (uint256[] memory usersLTs) {
        usersLTs = new uint256[](_borrowers.length);

        for (uint256 i; i < _borrowers.length; i++) {
            Borrower memory borrower = _borrowers[i];
            usersLTs[i] = SiloLensLib.getUserLt(borrower.silo, borrower.wallet);
        }
    }

    function getUsersHealth(Borrower[] calldata _borrowers) external view returns (BorrowerHealth[] memory healths) {
        healths = new BorrowerHealth[](_borrowers.length);

        for (uint256 i; i < _borrowers.length; i++) {
            Borrower memory borrower = _borrowers[i];
            BorrowerHealth memory health = healths[i];

            (health.ltv, health.lt) = SiloLensLib.getLtvAndLt(borrower.silo, borrower.wallet);
        }
    }

    /// @inheritdoc ISiloLens
    function getUserLTV(ISilo _silo, address _borrower) external view returns (uint256 userLTV) {
        return SiloLensLib.getLtv(_silo, _borrower);
    }

    /// @inheritdoc ISiloLens
    function getLtv(ISilo _silo, address _borrower) external view virtual returns (uint256 ltv) {
        return SiloLensLib.getLtv(_silo, _borrower);
    }

    /// @inheritdoc ISiloLens
    function hasPosition(ISiloConfig _siloConfig, address _borrower) external view virtual returns (bool has) {
        has = SiloLensLib.hasPosition(_siloConfig, _borrower);
    }

    /// @inheritdoc ISiloLens
    function inDebt(ISiloConfig _siloConfig, address _borrower) external view returns (bool hasDebt) {
        hasDebt = SiloLensLib.inDebt(_siloConfig, _borrower);
    }

    /// @inheritdoc ISiloLens
    function getFeesAndFeeReceivers(ISilo _silo)
        external
        view
        virtual
        returns (address daoFeeReceiver, address deployerFeeReceiver, uint256 daoFee, uint256 deployerFee)
    {
        (daoFeeReceiver, deployerFeeReceiver, daoFee, deployerFee,) = SiloStdLib.getFeesAndFeeReceiversWithAsset(_silo);
    }

    /// @inheritdoc ISiloLens
    function collateralBalanceOfUnderlying(ISilo _silo, address _borrower)
        external
        view
        virtual
        returns (uint256 borrowerCollateral)
    {
        return SiloLensLib.collateralBalanceOfUnderlying(_silo, _borrower);
    }

    /// @inheritdoc ISiloLens
    function debtBalanceOfUnderlying(ISilo _silo, address _borrower) external view virtual returns (uint256) {
        return _silo.maxRepay(_borrower);
    }

    /// @inheritdoc ISiloLens
    function maxLiquidation(ISilo _silo, IPartialLiquidation _hook, address _borrower)
        external
        view
        virtual
        returns (uint256 collateralToLiquidate, uint256 debtToRepay, bool sTokenRequired, bool fullLiquidation)
    {
        (collateralToLiquidate, debtToRepay, sTokenRequired) = _hook.maxLiquidation(_borrower);

        uint256 maxRepay = _silo.maxRepay(_borrower);
        fullLiquidation = maxRepay == debtToRepay;
    }

    /// @inheritdoc ISiloLens
    function totalDeposits(ISilo _silo) external view returns (uint256 totalDeposits) {
        totalDeposits = _silo.getTotalAssetsStorage(ISilo.AssetType.Collateral);
    }

    /// @inheritdoc ISiloLens
    function totalDepositsWithInterest(ISilo _silo) external view returns (uint256 amount) {
        amount = _silo.totalAssets();
    }

    function totalBorrowAmountWithInterest(ISilo _silo) external view returns (uint256 amount) {
        amount = _silo.getDebtAssets();
    }

    /// @inheritdoc ISiloLens
    function collateralOnlyDeposits(ISilo _silo) external view returns (uint256) {
        return _silo.getTotalAssetsStorage(ISilo.AssetType.Protected);
    }

    /// @inheritdoc ISiloLens
    function getDepositAmount(ISilo _silo, address _borrower)
        external
        view
        returns (uint256 borrowerDeposits)
    {
        borrowerDeposits = _silo.previewRedeem(_silo.balanceOf(_borrower));
    }

    /// @inheritdoc ISiloLens
    function totalBorrowAmount(ISilo _silo) external view returns (uint256) {
        return _silo.getTotalAssetsStorage(ISilo.AssetType.Debt);
    }

    /// @inheritdoc ISiloLens
    function totalBorrowShare(ISilo _silo) external view returns (uint256) {
        return SiloLensLib.totalBorrowShare(_silo);
    }

    /// @inheritdoc ISiloLens
    function getBorrowAmount(ISilo _silo, address _borrower)
        external
        view
        returns (uint256 maxRepay)
    {
        maxRepay = _silo.maxRepay(_borrower);
    }

    /// @inheritdoc ISiloLens
    function borrowShare(ISilo _silo, address _borrower) external view returns (uint256) {
        return SiloLensLib.borrowShare(_silo, _borrower);
    }

    /// @inheritdoc ISiloLens
    function protocolFees(ISilo _silo) external view returns (uint256 daoAndDeployerRevenue) {
        (daoAndDeployerRevenue,,,,) = _silo.getSiloStorage();
    }

    /// @inheritdoc ISiloLens
    function calculateCollateralValue(ISiloConfig _siloConfig, address _borrower)
        external
        view
        returns (uint256 collateralValue)
    {
        (collateralValue,) = SiloLensLib.calculateValues(_siloConfig, _borrower);
    }

    /// @inheritdoc ISiloLens
    function calculateBorrowValue(ISiloConfig _siloConfig, address _borrower)
        external
        view
        returns (uint256 borrowValue)
    {
        (, borrowValue) = SiloLensLib.calculateValues(_siloConfig, _borrower);
    }

    /// @inheritdoc ISiloLens
    function getUtilization(ISilo _silo) external view returns (uint256) {
        ISilo.UtilizationData memory data = _silo.utilizationData();

        if (data.collateralAssets != 0) {
            return data.debtAssets * _PRECISION_DECIMALS / data.collateralAssets;
        }
    }

    /// @inheritdoc ISiloLens
    function getInterestRateModel(ISilo _silo) external view virtual returns (address irm) {
        return SiloLensLib.getInterestRateModel(_silo);
    }

    /// @inheritdoc ISiloLens
    function getBorrowAPR(ISilo _silo) external view virtual returns (uint256 borrowAPR) {
        return SiloLensLib.getBorrowAPR(_silo);
    }

    /// @inheritdoc ISiloLens
    function getDepositAPR(ISilo _silo) external view virtual returns (uint256 depositAPR) {
        return SiloLensLib.getDepositAPR(_silo);
    }

    /// @inheritdoc ISiloLens
    function getAPRs(ISilo[] calldata _silos) external view virtual returns (APR[] memory aprs) {
        aprs = new APR[](_silos.length);

        for (uint256 i; i < _silos.length; i++) {
            ISilo silo = _silos[i];

            aprs[i] = APR({
                borrowAPR: SiloLensLib.getBorrowAPR(silo),
                depositAPR: SiloLensLib.getDepositAPR(silo)
            });
        }
    }

    function getModel(ISilo _silo) public view returns (IInterestRateModel irm) {
        irm = IInterestRateModel(_silo.config().getConfig(address(_silo)).interestRateModel);
    }

    function getSiloIncentivesControllerProgramsNames(
        address _siloIncentivesController
    ) public view returns (string[] memory programsNames) {
        IDistributionManager distributionManager = IDistributionManager(_siloIncentivesController);
        string[] memory originalProgramsNames = distributionManager.getAllProgramsNames();

        programsNames = new string[](originalProgramsNames.length);

        for (uint256 i; i < originalProgramsNames.length; i++) {
            bytes memory originalProgramName = bytes(originalProgramsNames[i]);

            if (isTokenAddress(originalProgramName)) {
                address token = address(bytes20(originalProgramName));
                programsNames[i] = Strings.toHexString(token);
            } else {
                programsNames[i] = originalProgramsNames[i];
            }
        }
    }

    function isTokenAddress(bytes memory _name) private view returns (bool isToken) {
        if (_name.length != 20) return false;

        address token = address(bytes20(_name));

        if (Utils.getCodeAt(token).length == 0) return false;

        // Sanity check to be sure that it is a token
        try IERC20(token).balanceOf(address(this)) returns (uint256) {
            isToken = true;
        } catch {}
    }
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.5.0;

interface IERC3156FlashBorrower {
    /// @notice During the execution of the flashloan, Silo methods are not taking into consideration the fact,
    /// that some (or all) tokens were transferred as flashloan, therefore some methods can return invalid state
    /// eg. maxWithdraw can return amount that are not available to withdraw during flashlon.
    /// @dev Receive a flash loan.
    /// @param _initiator The initiator of the loan.
    /// @param _token The loan currency.
    /// @param _amount The amount of tokens lent.
    /// @param _fee The additional amount of tokens to repay.
    /// @param _data Arbitrary data structure, intended to contain user-defined parameters.
    /// @return The keccak256 hash of "ERC3156FlashBorrower.onFlashLoan"
    function onFlashLoan(address _initiator, address _token, uint256 _amount, uint256 _fee, bytes calldata _data)
        external
        returns (bytes32);
}

// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.18;

library LibError {
    // Common errors
    error InvalidAsset();
    error InvalidValue();
    error InvalidAddress();
    error InvalidPermissions();
    error InvalidToken();
    error AboveMaxValue(uint256 maxValue);

    // Swap errors
    error SwapFailed();
    error InvalidPrice();
    error InvalidSwapPath();
    error InvalidSwapConfig();
    error ScaledInputFailed();
    error SlippageLimitExceeded();

    // Pendle errors
    error InvalidPendleMarket();

    // Silo erros
    error InvalidSiloMarket();
    error InvalidFlashLoanCaller();
    error InvalidFlashLoanInitiator();
    error InvalidFlashLoanAmount();
    error InvalidFlashLoanToken();
    error AboveMaxWithdraw(uint256 currentAmount, uint256 maxAmount);
}

// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.18;

interface ICeresSwapper {
    enum SwapType {
        PENDLE_TOKEN_TO_PT,
        PENDLE_PT_TO_TOKEN,
        ALGEBRA_V4_SWAPX,
        KYBERSWAP_CACHED_PATH,
        KYBERSWAP_AGGREGATOR,
        BALANCER_V3_SWAP_MULTI
    }

    struct SwapProvider {
        SwapType swapType;
        address router;
    }

    function getTokenPairHash(address _tokenIn, address _tokenOut) external pure returns (bytes32);

    function isSwapPathSet(bytes32 _tokenPairHash, SwapType _swapType) external view returns (bool);

    function isSwapPathSet(address _tokenIn, address _tokenOut, SwapType _swapType) external view returns (bool);

    function setStrategyApproval(address strategyAddress, bool status) external;

    function setSwapPath(address _tokenIn, address _tokenOut, SwapType _swapType, bytes memory _path) external;

    function setSwapProvider(address _tokenIn, address _tokenOut, SwapProvider calldata _provider) external;

    function setSwapAggregator(address _tokenIn, address _tokenOut, SwapProvider calldata _provider) external;

    function swapFrom(
        address fromToken,
        address toToken,
        uint256 amountIn,
        uint256 minAmountOut,
        address receiver,
        bytes calldata extraData
    ) external returns (uint256 tokensReceived);

    function swapTo(
        address fromToken,
        address toToken,
        uint256 amountOut,
        uint256 maxAmountIn,
        address receiver,
        bytes calldata extraData
    ) external returns (uint256 actualAmountIn);

    function swapProvider(bytes32 tokenPairHash) external view returns (SwapType swapType, address router);

    function swapAggregator(bytes32 tokenPairHash) external view returns (SwapType swapType, address router);

    function swapUsingAggregator(
        address fromToken,
        address toToken,
        uint256 amountIn,
        uint256 minAmountOut,
        address receiver,
        bytes calldata encodedSwapData
    ) external returns (uint256 tokensReceived);

    function tokenSwapPath(bytes32 tokenPairHash, SwapType swapType) external view returns (bytes memory);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (interfaces/IERC1363.sol)

pragma solidity ^0.8.20;

import {IERC20} from "./IERC20.sol";
import {IERC165} from "./IERC165.sol";

/**
 * @title IERC1363
 * @dev Interface of the ERC-1363 standard as defined in the https://eips.ethereum.org/EIPS/eip-1363[ERC-1363].
 *
 * Defines an extension interface for ERC-20 tokens that supports executing code on a recipient contract
 * after `transfer` or `transferFrom`, or code on a spender contract after `approve`, in a single transaction.
 */
interface IERC1363 is IERC20, IERC165 {
    /*
     * Note: the ERC-165 identifier for this interface is 0xb0202a11.
     * 0xb0202a11 ===
     *   bytes4(keccak256('transferAndCall(address,uint256)')) ^
     *   bytes4(keccak256('transferAndCall(address,uint256,bytes)')) ^
     *   bytes4(keccak256('transferFromAndCall(address,address,uint256)')) ^
     *   bytes4(keccak256('transferFromAndCall(address,address,uint256,bytes)')) ^
     *   bytes4(keccak256('approveAndCall(address,uint256)')) ^
     *   bytes4(keccak256('approveAndCall(address,uint256,bytes)'))
     */

    /**
     * @dev Moves a `value` amount of tokens from the caller's account to `to`
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferAndCall(address to, uint256 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from the caller's account to `to`
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @param data Additional data with no specified format, sent in call to `to`.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferAndCall(address to, uint256 value, bytes calldata data) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the allowance mechanism
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param from The address which you want to send tokens from.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferFromAndCall(address from, address to, uint256 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the allowance mechanism
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param from The address which you want to send tokens from.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @param data Additional data with no specified format, sent in call to `to`.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferFromAndCall(address from, address to, uint256 value, bytes calldata data) external returns (bool);

    /**
     * @dev Sets a `value` amount of tokens as the allowance of `spender` over the
     * caller's tokens and then calls {IERC1363Spender-onApprovalReceived} on `spender`.
     * @param spender The address which will spend the funds.
     * @param value The amount of tokens to be spent.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function approveAndCall(address spender, uint256 value) external returns (bool);

    /**
     * @dev Sets a `value` amount of tokens as the allowance of `spender` over the
     * caller's tokens and then calls {IERC1363Spender-onApprovalReceived} on `spender`.
     * @param spender The address which will spend the funds.
     * @param value The amount of tokens to be spent.
     * @param data Additional data with no specified format, sent in call to `spender`.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function approveAndCall(address spender, uint256 value, bytes calldata data) external returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/Panic.sol)

pragma solidity ^0.8.20;

/**
 * @dev Helper library for emitting standardized panic codes.
 *
 * ```solidity
 * contract Example {
 *      using Panic for uint256;
 *
 *      // Use any of the declared internal constants
 *      function foo() { Panic.GENERIC.panic(); }
 *
 *      // Alternatively
 *      function foo() { Panic.panic(Panic.GENERIC); }
 * }
 * ```
 *
 * Follows the list from https://github.com/ethereum/solidity/blob/v0.8.24/libsolutil/ErrorCodes.h[libsolutil].
 *
 * _Available since v5.1._
 */
// slither-disable-next-line unused-state
library Panic {
    /// @dev generic / unspecified error
    uint256 internal constant GENERIC = 0x00;
    /// @dev used by the assert() builtin
    uint256 internal constant ASSERT = 0x01;
    /// @dev arithmetic underflow or overflow
    uint256 internal constant UNDER_OVERFLOW = 0x11;
    /// @dev division or modulo by zero
    uint256 internal constant DIVISION_BY_ZERO = 0x12;
    /// @dev enum conversion error
    uint256 internal constant ENUM_CONVERSION_ERROR = 0x21;
    /// @dev invalid encoding in storage
    uint256 internal constant STORAGE_ENCODING_ERROR = 0x22;
    /// @dev empty array pop
    uint256 internal constant EMPTY_ARRAY_POP = 0x31;
    /// @dev array out of bounds access
    uint256 internal constant ARRAY_OUT_OF_BOUNDS = 0x32;
    /// @dev resource error (too large allocation or too large array)
    uint256 internal constant RESOURCE_ERROR = 0x41;
    /// @dev calling invalid internal function
    uint256 internal constant INVALID_INTERNAL_FUNCTION = 0x51;

    /// @dev Reverts with a panic code. Recommended to use with
    /// the internal constants with predefined codes.
    function panic(uint256 code) internal pure {
        assembly ("memory-safe") {
            mstore(0x00, 0x4e487b71)
            mstore(0x20, code)
            revert(0x1c, 0x24)
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/math/SafeCast.sol)
// This file was procedurally generated from scripts/generate/templates/SafeCast.js.

pragma solidity ^0.8.20;

/**
 * @dev Wrappers over Solidity's uintXX/intXX/bool casting operators with added overflow
 * checks.
 *
 * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can
 * easily result in undesired exploitation or bugs, since developers usually
 * assume that overflows raise errors. `SafeCast` restores this intuition by
 * reverting the transaction when such an operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeCast {
    /**
     * @dev Value doesn't fit in an uint of `bits` size.
     */
    error SafeCastOverflowedUintDowncast(uint8 bits, uint256 value);

    /**
     * @dev An int value doesn't fit in an uint of `bits` size.
     */
    error SafeCastOverflowedIntToUint(int256 value);

    /**
     * @dev Value doesn't fit in an int of `bits` size.
     */
    error SafeCastOverflowedIntDowncast(uint8 bits, int256 value);

    /**
     * @dev An uint value doesn't fit in an int of `bits` size.
     */
    error SafeCastOverflowedUintToInt(uint256 value);

    /**
     * @dev Returns the downcasted uint248 from uint256, reverting on
     * overflow (when the input is greater than largest uint248).
     *
     * Counterpart to Solidity's `uint248` operator.
     *
     * Requirements:
     *
     * - input must fit into 248 bits
     */
    function toUint248(uint256 value) internal pure returns (uint248) {
        if (value > type(uint248).max) {
            revert SafeCastOverflowedUintDowncast(248, value);
        }
        return uint248(value);
    }

    /**
     * @dev Returns the downcasted uint240 from uint256, reverting on
     * overflow (when the input is greater than largest uint240).
     *
     * Counterpart to Solidity's `uint240` operator.
     *
     * Requirements:
     *
     * - input must fit into 240 bits
     */
    function toUint240(uint256 value) internal pure returns (uint240) {
        if (value > type(uint240).max) {
            revert SafeCastOverflowedUintDowncast(240, value);
        }
        return uint240(value);
    }

    /**
     * @dev Returns the downcasted uint232 from uint256, reverting on
     * overflow (when the input is greater than largest uint232).
     *
     * Counterpart to Solidity's `uint232` operator.
     *
     * Requirements:
     *
     * - input must fit into 232 bits
     */
    function toUint232(uint256 value) internal pure returns (uint232) {
        if (value > type(uint232).max) {
            revert SafeCastOverflowedUintDowncast(232, value);
        }
        return uint232(value);
    }

    /**
     * @dev Returns the downcasted uint224 from uint256, reverting on
     * overflow (when the input is greater than largest uint224).
     *
     * Counterpart to Solidity's `uint224` operator.
     *
     * Requirements:
     *
     * - input must fit into 224 bits
     */
    function toUint224(uint256 value) internal pure returns (uint224) {
        if (value > type(uint224).max) {
            revert SafeCastOverflowedUintDowncast(224, value);
        }
        return uint224(value);
    }

    /**
     * @dev Returns the downcasted uint216 from uint256, reverting on
     * overflow (when the input is greater than largest uint216).
     *
     * Counterpart to Solidity's `uint216` operator.
     *
     * Requirements:
     *
     * - input must fit into 216 bits
     */
    function toUint216(uint256 value) internal pure returns (uint216) {
        if (value > type(uint216).max) {
            revert SafeCastOverflowedUintDowncast(216, value);
        }
        return uint216(value);
    }

    /**
     * @dev Returns the downcasted uint208 from uint256, reverting on
     * overflow (when the input is greater than largest uint208).
     *
     * Counterpart to Solidity's `uint208` operator.
     *
     * Requirements:
     *
     * - input must fit into 208 bits
     */
    function toUint208(uint256 value) internal pure returns (uint208) {
        if (value > type(uint208).max) {
            revert SafeCastOverflowedUintDowncast(208, value);
        }
        return uint208(value);
    }

    /**
     * @dev Returns the downcasted uint200 from uint256, reverting on
     * overflow (when the input is greater than largest uint200).
     *
     * Counterpart to Solidity's `uint200` operator.
     *
     * Requirements:
     *
     * - input must fit into 200 bits
     */
    function toUint200(uint256 value) internal pure returns (uint200) {
        if (value > type(uint200).max) {
            revert SafeCastOverflowedUintDowncast(200, value);
        }
        return uint200(value);
    }

    /**
     * @dev Returns the downcasted uint192 from uint256, reverting on
     * overflow (when the input is greater than largest uint192).
     *
     * Counterpart to Solidity's `uint192` operator.
     *
     * Requirements:
     *
     * - input must fit into 192 bits
     */
    function toUint192(uint256 value) internal pure returns (uint192) {
        if (value > type(uint192).max) {
            revert SafeCastOverflowedUintDowncast(192, value);
        }
        return uint192(value);
    }

    /**
     * @dev Returns the downcasted uint184 from uint256, reverting on
     * overflow (when the input is greater than largest uint184).
     *
     * Counterpart to Solidity's `uint184` operator.
     *
     * Requirements:
     *
     * - input must fit into 184 bits
     */
    function toUint184(uint256 value) internal pure returns (uint184) {
        if (value > type(uint184).max) {
            revert SafeCastOverflowedUintDowncast(184, value);
        }
        return uint184(value);
    }

    /**
     * @dev Returns the downcasted uint176 from uint256, reverting on
     * overflow (when the input is greater than largest uint176).
     *
     * Counterpart to Solidity's `uint176` operator.
     *
     * Requirements:
     *
     * - input must fit into 176 bits
     */
    function toUint176(uint256 value) internal pure returns (uint176) {
        if (value > type(uint176).max) {
            revert SafeCastOverflowedUintDowncast(176, value);
        }
        return uint176(value);
    }

    /**
     * @dev Returns the downcasted uint168 from uint256, reverting on
     * overflow (when the input is greater than largest uint168).
     *
     * Counterpart to Solidity's `uint168` operator.
     *
     * Requirements:
     *
     * - input must fit into 168 bits
     */
    function toUint168(uint256 value) internal pure returns (uint168) {
        if (value > type(uint168).max) {
            revert SafeCastOverflowedUintDowncast(168, value);
        }
        return uint168(value);
    }

    /**
     * @dev Returns the downcasted uint160 from uint256, reverting on
     * overflow (when the input is greater than largest uint160).
     *
     * Counterpart to Solidity's `uint160` operator.
     *
     * Requirements:
     *
     * - input must fit into 160 bits
     */
    function toUint160(uint256 value) internal pure returns (uint160) {
        if (value > type(uint160).max) {
            revert SafeCastOverflowedUintDowncast(160, value);
        }
        return uint160(value);
    }

    /**
     * @dev Returns the downcasted uint152 from uint256, reverting on
     * overflow (when the input is greater than largest uint152).
     *
     * Counterpart to Solidity's `uint152` operator.
     *
     * Requirements:
     *
     * - input must fit into 152 bits
     */
    function toUint152(uint256 value) internal pure returns (uint152) {
        if (value > type(uint152).max) {
            revert SafeCastOverflowedUintDowncast(152, value);
        }
        return uint152(value);
    }

    /**
     * @dev Returns the downcasted uint144 from uint256, reverting on
     * overflow (when the input is greater than largest uint144).
     *
     * Counterpart to Solidity's `uint144` operator.
     *
     * Requirements:
     *
     * - input must fit into 144 bits
     */
    function toUint144(uint256 value) internal pure returns (uint144) {
        if (value > type(uint144).max) {
            revert SafeCastOverflowedUintDowncast(144, value);
        }
        return uint144(value);
    }

    /**
     * @dev Returns the downcasted uint136 from uint256, reverting on
     * overflow (when the input is greater than largest uint136).
     *
     * Counterpart to Solidity's `uint136` operator.
     *
     * Requirements:
     *
     * - input must fit into 136 bits
     */
    function toUint136(uint256 value) internal pure returns (uint136) {
        if (value > type(uint136).max) {
            revert SafeCastOverflowedUintDowncast(136, value);
        }
        return uint136(value);
    }

    /**
     * @dev Returns the downcasted uint128 from uint256, reverting on
     * overflow (when the input is greater than largest uint128).
     *
     * Counterpart to Solidity's `uint128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     */
    function toUint128(uint256 value) internal pure returns (uint128) {
        if (value > type(uint128).max) {
            revert SafeCastOverflowedUintDowncast(128, value);
        }
        return uint128(value);
    }

    /**
     * @dev Returns the downcasted uint120 from uint256, reverting on
     * overflow (when the input is greater than largest uint120).
     *
     * Counterpart to Solidity's `uint120` operator.
     *
     * Requirements:
     *
     * - input must fit into 120 bits
     */
    function toUint120(uint256 value) internal pure returns (uint120) {
        if (value > type(uint120).max) {
            revert SafeCastOverflowedUintDowncast(120, value);
        }
        return uint120(value);
    }

    /**
     * @dev Returns the downcasted uint112 from uint256, reverting on
     * overflow (when the input is greater than largest uint112).
     *
     * Counterpart to Solidity's `uint112` operator.
     *
     * Requirements:
     *
     * - input must fit into 112 bits
     */
    function toUint112(uint256 value) internal pure returns (uint112) {
        if (value > type(uint112).max) {
            revert SafeCastOverflowedUintDowncast(112, value);
        }
        return uint112(value);
    }

    /**
     * @dev Returns the downcasted uint104 from uint256, reverting on
     * overflow (when the input is greater than largest uint104).
     *
     * Counterpart to Solidity's `uint104` operator.
     *
     * Requirements:
     *
     * - input must fit into 104 bits
     */
    function toUint104(uint256 value) internal pure returns (uint104) {
        if (value > type(uint104).max) {
            revert SafeCastOverflowedUintDowncast(104, value);
        }
        return uint104(value);
    }

    /**
     * @dev Returns the downcasted uint96 from uint256, reverting on
     * overflow (when the input is greater than largest uint96).
     *
     * Counterpart to Solidity's `uint96` operator.
     *
     * Requirements:
     *
     * - input must fit into 96 bits
     */
    function toUint96(uint256 value) internal pure returns (uint96) {
        if (value > type(uint96).max) {
            revert SafeCastOverflowedUintDowncast(96, value);
        }
        return uint96(value);
    }

    /**
     * @dev Returns the downcasted uint88 from uint256, reverting on
     * overflow (when the input is greater than largest uint88).
     *
     * Counterpart to Solidity's `uint88` operator.
     *
     * Requirements:
     *
     * - input must fit into 88 bits
     */
    function toUint88(uint256 value) internal pure returns (uint88) {
        if (value > type(uint88).max) {
            revert SafeCastOverflowedUintDowncast(88, value);
        }
        return uint88(value);
    }

    /**
     * @dev Returns the downcasted uint80 from uint256, reverting on
     * overflow (when the input is greater than largest uint80).
     *
     * Counterpart to Solidity's `uint80` operator.
     *
     * Requirements:
     *
     * - input must fit into 80 bits
     */
    function toUint80(uint256 value) internal pure returns (uint80) {
        if (value > type(uint80).max) {
            revert SafeCastOverflowedUintDowncast(80, value);
        }
        return uint80(value);
    }

    /**
     * @dev Returns the downcasted uint72 from uint256, reverting on
     * overflow (when the input is greater than largest uint72).
     *
     * Counterpart to Solidity's `uint72` operator.
     *
     * Requirements:
     *
     * - input must fit into 72 bits
     */
    function toUint72(uint256 value) internal pure returns (uint72) {
        if (value > type(uint72).max) {
            revert SafeCastOverflowedUintDowncast(72, value);
        }
        return uint72(value);
    }

    /**
     * @dev Returns the downcasted uint64 from uint256, reverting on
     * overflow (when the input is greater than largest uint64).
     *
     * Counterpart to Solidity's `uint64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     */
    function toUint64(uint256 value) internal pure returns (uint64) {
        if (value > type(uint64).max) {
            revert SafeCastOverflowedUintDowncast(64, value);
        }
        return uint64(value);
    }

    /**
     * @dev Returns the downcasted uint56 from uint256, reverting on
     * overflow (when the input is greater than largest uint56).
     *
     * Counterpart to Solidity's `uint56` operator.
     *
     * Requirements:
     *
     * - input must fit into 56 bits
     */
    function toUint56(uint256 value) internal pure returns (uint56) {
        if (value > type(uint56).max) {
            revert SafeCastOverflowedUintDowncast(56, value);
        }
        return uint56(value);
    }

    /**
     * @dev Returns the downcasted uint48 from uint256, reverting on
     * overflow (when the input is greater than largest uint48).
     *
     * Counterpart to Solidity's `uint48` operator.
     *
     * Requirements:
     *
     * - input must fit into 48 bits
     */
    function toUint48(uint256 value) internal pure returns (uint48) {
        if (value > type(uint48).max) {
            revert SafeCastOverflowedUintDowncast(48, value);
        }
        return uint48(value);
    }

    /**
     * @dev Returns the downcasted uint40 from uint256, reverting on
     * overflow (when the input is greater than largest uint40).
     *
     * Counterpart to Solidity's `uint40` operator.
     *
     * Requirements:
     *
     * - input must fit into 40 bits
     */
    function toUint40(uint256 value) internal pure returns (uint40) {
        if (value > type(uint40).max) {
            revert SafeCastOverflowedUintDowncast(40, value);
        }
        return uint40(value);
    }

    /**
     * @dev Returns the downcasted uint32 from uint256, reverting on
     * overflow (when the input is greater than largest uint32).
     *
     * Counterpart to Solidity's `uint32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     */
    function toUint32(uint256 value) internal pure returns (uint32) {
        if (value > type(uint32).max) {
            revert SafeCastOverflowedUintDowncast(32, value);
        }
        return uint32(value);
    }

    /**
     * @dev Returns the downcasted uint24 from uint256, reverting on
     * overflow (when the input is greater than largest uint24).
     *
     * Counterpart to Solidity's `uint24` operator.
     *
     * Requirements:
     *
     * - input must fit into 24 bits
     */
    function toUint24(uint256 value) internal pure returns (uint24) {
        if (value > type(uint24).max) {
            revert SafeCastOverflowedUintDowncast(24, value);
        }
        return uint24(value);
    }

    /**
     * @dev Returns the downcasted uint16 from uint256, reverting on
     * overflow (when the input is greater than largest uint16).
     *
     * Counterpart to Solidity's `uint16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     */
    function toUint16(uint256 value) internal pure returns (uint16) {
        if (value > type(uint16).max) {
            revert SafeCastOverflowedUintDowncast(16, value);
        }
        return uint16(value);
    }

    /**
     * @dev Returns the downcasted uint8 from uint256, reverting on
     * overflow (when the input is greater than largest uint8).
     *
     * Counterpart to Solidity's `uint8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits
     */
    function toUint8(uint256 value) internal pure returns (uint8) {
        if (value > type(uint8).max) {
            revert SafeCastOverflowedUintDowncast(8, value);
        }
        return uint8(value);
    }

    /**
     * @dev Converts a signed int256 into an unsigned uint256.
     *
     * Requirements:
     *
     * - input must be greater than or equal to 0.
     */
    function toUint256(int256 value) internal pure returns (uint256) {
        if (value < 0) {
            revert SafeCastOverflowedIntToUint(value);
        }
        return uint256(value);
    }

    /**
     * @dev Returns the downcasted int248 from int256, reverting on
     * overflow (when the input is less than smallest int248 or
     * greater than largest int248).
     *
     * Counterpart to Solidity's `int248` operator.
     *
     * Requirements:
     *
     * - input must fit into 248 bits
     */
    function toInt248(int256 value) internal pure returns (int248 downcasted) {
        downcasted = int248(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(248, value);
        }
    }

    /**
     * @dev Returns the downcasted int240 from int256, reverting on
     * overflow (when the input is less than smallest int240 or
     * greater than largest int240).
     *
     * Counterpart to Solidity's `int240` operator.
     *
     * Requirements:
     *
     * - input must fit into 240 bits
     */
    function toInt240(int256 value) internal pure returns (int240 downcasted) {
        downcasted = int240(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(240, value);
        }
    }

    /**
     * @dev Returns the downcasted int232 from int256, reverting on
     * overflow (when the input is less than smallest int232 or
     * greater than largest int232).
     *
     * Counterpart to Solidity's `int232` operator.
     *
     * Requirements:
     *
     * - input must fit into 232 bits
     */
    function toInt232(int256 value) internal pure returns (int232 downcasted) {
        downcasted = int232(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(232, value);
        }
    }

    /**
     * @dev Returns the downcasted int224 from int256, reverting on
     * overflow (when the input is less than smallest int224 or
     * greater than largest int224).
     *
     * Counterpart to Solidity's `int224` operator.
     *
     * Requirements:
     *
     * - input must fit into 224 bits
     */
    function toInt224(int256 value) internal pure returns (int224 downcasted) {
        downcasted = int224(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(224, value);
        }
    }

    /**
     * @dev Returns the downcasted int216 from int256, reverting on
     * overflow (when the input is less than smallest int216 or
     * greater than largest int216).
     *
     * Counterpart to Solidity's `int216` operator.
     *
     * Requirements:
     *
     * - input must fit into 216 bits
     */
    function toInt216(int256 value) internal pure returns (int216 downcasted) {
        downcasted = int216(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(216, value);
        }
    }

    /**
     * @dev Returns the downcasted int208 from int256, reverting on
     * overflow (when the input is less than smallest int208 or
     * greater than largest int208).
     *
     * Counterpart to Solidity's `int208` operator.
     *
     * Requirements:
     *
     * - input must fit into 208 bits
     */
    function toInt208(int256 value) internal pure returns (int208 downcasted) {
        downcasted = int208(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(208, value);
        }
    }

    /**
     * @dev Returns the downcasted int200 from int256, reverting on
     * overflow (when the input is less than smallest int200 or
     * greater than largest int200).
     *
     * Counterpart to Solidity's `int200` operator.
     *
     * Requirements:
     *
     * - input must fit into 200 bits
     */
    function toInt200(int256 value) internal pure returns (int200 downcasted) {
        downcasted = int200(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(200, value);
        }
    }

    /**
     * @dev Returns the downcasted int192 from int256, reverting on
     * overflow (when the input is less than smallest int192 or
     * greater than largest int192).
     *
     * Counterpart to Solidity's `int192` operator.
     *
     * Requirements:
     *
     * - input must fit into 192 bits
     */
    function toInt192(int256 value) internal pure returns (int192 downcasted) {
        downcasted = int192(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(192, value);
        }
    }

    /**
     * @dev Returns the downcasted int184 from int256, reverting on
     * overflow (when the input is less than smallest int184 or
     * greater than largest int184).
     *
     * Counterpart to Solidity's `int184` operator.
     *
     * Requirements:
     *
     * - input must fit into 184 bits
     */
    function toInt184(int256 value) internal pure returns (int184 downcasted) {
        downcasted = int184(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(184, value);
        }
    }

    /**
     * @dev Returns the downcasted int176 from int256, reverting on
     * overflow (when the input is less than smallest int176 or
     * greater than largest int176).
     *
     * Counterpart to Solidity's `int176` operator.
     *
     * Requirements:
     *
     * - input must fit into 176 bits
     */
    function toInt176(int256 value) internal pure returns (int176 downcasted) {
        downcasted = int176(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(176, value);
        }
    }

    /**
     * @dev Returns the downcasted int168 from int256, reverting on
     * overflow (when the input is less than smallest int168 or
     * greater than largest int168).
     *
     * Counterpart to Solidity's `int168` operator.
     *
     * Requirements:
     *
     * - input must fit into 168 bits
     */
    function toInt168(int256 value) internal pure returns (int168 downcasted) {
        downcasted = int168(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(168, value);
        }
    }

    /**
     * @dev Returns the downcasted int160 from int256, reverting on
     * overflow (when the input is less than smallest int160 or
     * greater than largest int160).
     *
     * Counterpart to Solidity's `int160` operator.
     *
     * Requirements:
     *
     * - input must fit into 160 bits
     */
    function toInt160(int256 value) internal pure returns (int160 downcasted) {
        downcasted = int160(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(160, value);
        }
    }

    /**
     * @dev Returns the downcasted int152 from int256, reverting on
     * overflow (when the input is less than smallest int152 or
     * greater than largest int152).
     *
     * Counterpart to Solidity's `int152` operator.
     *
     * Requirements:
     *
     * - input must fit into 152 bits
     */
    function toInt152(int256 value) internal pure returns (int152 downcasted) {
        downcasted = int152(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(152, value);
        }
    }

    /**
     * @dev Returns the downcasted int144 from int256, reverting on
     * overflow (when the input is less than smallest int144 or
     * greater than largest int144).
     *
     * Counterpart to Solidity's `int144` operator.
     *
     * Requirements:
     *
     * - input must fit into 144 bits
     */
    function toInt144(int256 value) internal pure returns (int144 downcasted) {
        downcasted = int144(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(144, value);
        }
    }

    /**
     * @dev Returns the downcasted int136 from int256, reverting on
     * overflow (when the input is less than smallest int136 or
     * greater than largest int136).
     *
     * Counterpart to Solidity's `int136` operator.
     *
     * Requirements:
     *
     * - input must fit into 136 bits
     */
    function toInt136(int256 value) internal pure returns (int136 downcasted) {
        downcasted = int136(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(136, value);
        }
    }

    /**
     * @dev Returns the downcasted int128 from int256, reverting on
     * overflow (when the input is less than smallest int128 or
     * greater than largest int128).
     *
     * Counterpart to Solidity's `int128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     */
    function toInt128(int256 value) internal pure returns (int128 downcasted) {
        downcasted = int128(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(128, value);
        }
    }

    /**
     * @dev Returns the downcasted int120 from int256, reverting on
     * overflow (when the input is less than smallest int120 or
     * greater than largest int120).
     *
     * Counterpart to Solidity's `int120` operator.
     *
     * Requirements:
     *
     * - input must fit into 120 bits
     */
    function toInt120(int256 value) internal pure returns (int120 downcasted) {
        downcasted = int120(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(120, value);
        }
    }

    /**
     * @dev Returns the downcasted int112 from int256, reverting on
     * overflow (when the input is less than smallest int112 or
     * greater than largest int112).
     *
     * Counterpart to Solidity's `int112` operator.
     *
     * Requirements:
     *
     * - input must fit into 112 bits
     */
    function toInt112(int256 value) internal pure returns (int112 downcasted) {
        downcasted = int112(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(112, value);
        }
    }

    /**
     * @dev Returns the downcasted int104 from int256, reverting on
     * overflow (when the input is less than smallest int104 or
     * greater than largest int104).
     *
     * Counterpart to Solidity's `int104` operator.
     *
     * Requirements:
     *
     * - input must fit into 104 bits
     */
    function toInt104(int256 value) internal pure returns (int104 downcasted) {
        downcasted = int104(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(104, value);
        }
    }

    /**
     * @dev Returns the downcasted int96 from int256, reverting on
     * overflow (when the input is less than smallest int96 or
     * greater than largest int96).
     *
     * Counterpart to Solidity's `int96` operator.
     *
     * Requirements:
     *
     * - input must fit into 96 bits
     */
    function toInt96(int256 value) internal pure returns (int96 downcasted) {
        downcasted = int96(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(96, value);
        }
    }

    /**
     * @dev Returns the downcasted int88 from int256, reverting on
     * overflow (when the input is less than smallest int88 or
     * greater than largest int88).
     *
     * Counterpart to Solidity's `int88` operator.
     *
     * Requirements:
     *
     * - input must fit into 88 bits
     */
    function toInt88(int256 value) internal pure returns (int88 downcasted) {
        downcasted = int88(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(88, value);
        }
    }

    /**
     * @dev Returns the downcasted int80 from int256, reverting on
     * overflow (when the input is less than smallest int80 or
     * greater than largest int80).
     *
     * Counterpart to Solidity's `int80` operator.
     *
     * Requirements:
     *
     * - input must fit into 80 bits
     */
    function toInt80(int256 value) internal pure returns (int80 downcasted) {
        downcasted = int80(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(80, value);
        }
    }

    /**
     * @dev Returns the downcasted int72 from int256, reverting on
     * overflow (when the input is less than smallest int72 or
     * greater than largest int72).
     *
     * Counterpart to Solidity's `int72` operator.
     *
     * Requirements:
     *
     * - input must fit into 72 bits
     */
    function toInt72(int256 value) internal pure returns (int72 downcasted) {
        downcasted = int72(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(72, value);
        }
    }

    /**
     * @dev Returns the downcasted int64 from int256, reverting on
     * overflow (when the input is less than smallest int64 or
     * greater than largest int64).
     *
     * Counterpart to Solidity's `int64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     */
    function toInt64(int256 value) internal pure returns (int64 downcasted) {
        downcasted = int64(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(64, value);
        }
    }

    /**
     * @dev Returns the downcasted int56 from int256, reverting on
     * overflow (when the input is less than smallest int56 or
     * greater than largest int56).
     *
     * Counterpart to Solidity's `int56` operator.
     *
     * Requirements:
     *
     * - input must fit into 56 bits
     */
    function toInt56(int256 value) internal pure returns (int56 downcasted) {
        downcasted = int56(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(56, value);
        }
    }

    /**
     * @dev Returns the downcasted int48 from int256, reverting on
     * overflow (when the input is less than smallest int48 or
     * greater than largest int48).
     *
     * Counterpart to Solidity's `int48` operator.
     *
     * Requirements:
     *
     * - input must fit into 48 bits
     */
    function toInt48(int256 value) internal pure returns (int48 downcasted) {
        downcasted = int48(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(48, value);
        }
    }

    /**
     * @dev Returns the downcasted int40 from int256, reverting on
     * overflow (when the input is less than smallest int40 or
     * greater than largest int40).
     *
     * Counterpart to Solidity's `int40` operator.
     *
     * Requirements:
     *
     * - input must fit into 40 bits
     */
    function toInt40(int256 value) internal pure returns (int40 downcasted) {
        downcasted = int40(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(40, value);
        }
    }

    /**
     * @dev Returns the downcasted int32 from int256, reverting on
     * overflow (when the input is less than smallest int32 or
     * greater than largest int32).
     *
     * Counterpart to Solidity's `int32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     */
    function toInt32(int256 value) internal pure returns (int32 downcasted) {
        downcasted = int32(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(32, value);
        }
    }

    /**
     * @dev Returns the downcasted int24 from int256, reverting on
     * overflow (when the input is less than smallest int24 or
     * greater than largest int24).
     *
     * Counterpart to Solidity's `int24` operator.
     *
     * Requirements:
     *
     * - input must fit into 24 bits
     */
    function toInt24(int256 value) internal pure returns (int24 downcasted) {
        downcasted = int24(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(24, value);
        }
    }

    /**
     * @dev Returns the downcasted int16 from int256, reverting on
     * overflow (when the input is less than smallest int16 or
     * greater than largest int16).
     *
     * Counterpart to Solidity's `int16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     */
    function toInt16(int256 value) internal pure returns (int16 downcasted) {
        downcasted = int16(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(16, value);
        }
    }

    /**
     * @dev Returns the downcasted int8 from int256, reverting on
     * overflow (when the input is less than smallest int8 or
     * greater than largest int8).
     *
     * Counterpart to Solidity's `int8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits
     */
    function toInt8(int256 value) internal pure returns (int8 downcasted) {
        downcasted = int8(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(8, value);
        }
    }

    /**
     * @dev Converts an unsigned uint256 into a signed int256.
     *
     * Requirements:
     *
     * - input must be less than or equal to maxInt256.
     */
    function toInt256(uint256 value) internal pure returns (int256) {
        // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive
        if (value > uint256(type(int256).max)) {
            revert SafeCastOverflowedUintToInt(value);
        }
        return int256(value);
    }

    /**
     * @dev Cast a boolean (false or true) to a uint256 (0 or 1) with no jump.
     */
    function toUint(bool b) internal pure returns (uint256 u) {
        assembly ("memory-safe") {
            u := iszero(iszero(b))
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.3.0) (token/ERC20/ERC20.sol)

pragma solidity ^0.8.20;

import {IERC20} from "./IERC20.sol";
import {IERC20Metadata} from "./extensions/IERC20Metadata.sol";
import {Context} from "../../utils/Context.sol";
import {IERC20Errors} from "../../interfaces/draft-IERC6093.sol";

/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * The default value of {decimals} is 18. To change this, you should override
 * this function so it returns a different value.
 *
 * We have followed general OpenZeppelin Contracts guidelines: functions revert
 * instead returning `false` on failure. This behavior is nonetheless
 * conventional and does not conflict with the expectations of ERC-20
 * applications.
 */
abstract contract ERC20 is Context, IERC20, IERC20Metadata, IERC20Errors {
    mapping(address account => uint256) private _balances;

    mapping(address account => mapping(address spender => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

    /**
     * @dev Sets the values for {name} and {symbol}.
     *
     * Both values are immutable: they can only be set once during construction.
     */
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5.05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the default value returned by this function, unless
     * it's overridden.
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view virtual returns (uint8) {
        return 18;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view virtual returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view virtual returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - the caller must have a balance of at least `value`.
     */
    function transfer(address to, uint256 value) public virtual returns (bool) {
        address owner = _msgSender();
        _transfer(owner, to, value);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * NOTE: If `value` is the maximum `uint256`, the allowance is not updated on
     * `transferFrom`. This is semantically equivalent to an infinite approval.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 value) public virtual returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, value);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Skips emitting an {Approval} event indicating an allowance update. This is not
     * required by the ERC. See {xref-ERC20-_approve-address-address-uint256-bool-}[_approve].
     *
     * NOTE: Does not update the allowance if the current allowance
     * is the maximum `uint256`.
     *
     * Requirements:
     *
     * - `from` and `to` cannot be the zero address.
     * - `from` must have a balance of at least `value`.
     * - the caller must have allowance for ``from``'s tokens of at least
     * `value`.
     */
    function transferFrom(address from, address to, uint256 value) public virtual returns (bool) {
        address spender = _msgSender();
        _spendAllowance(from, spender, value);
        _transfer(from, to, value);
        return true;
    }

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to`.
     *
     * This internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * NOTE: This function is not virtual, {_update} should be overridden instead.
     */
    function _transfer(address from, address to, uint256 value) internal {
        if (from == address(0)) {
            revert ERC20InvalidSender(address(0));
        }
        if (to == address(0)) {
            revert ERC20InvalidReceiver(address(0));
        }
        _update(from, to, value);
    }

    /**
     * @dev Transfers a `value` amount of tokens from `from` to `to`, or alternatively mints (or burns) if `from`
     * (or `to`) is the zero address. All customizations to transfers, mints, and burns should be done by overriding
     * this function.
     *
     * Emits a {Transfer} event.
     */
    function _update(address from, address to, uint256 value) internal virtual {
        if (from == address(0)) {
            // Overflow check required: The rest of the code assumes that totalSupply never overflows
            _totalSupply += value;
        } else {
            uint256 fromBalance = _balances[from];
            if (fromBalance < value) {
                revert ERC20InsufficientBalance(from, fromBalance, value);
            }
            unchecked {
                // Overflow not possible: value <= fromBalance <= totalSupply.
                _balances[from] = fromBalance - value;
            }
        }

        if (to == address(0)) {
            unchecked {
                // Overflow not possible: value <= totalSupply or value <= fromBalance <= totalSupply.
                _totalSupply -= value;
            }
        } else {
            unchecked {
                // Overflow not possible: balance + value is at most totalSupply, which we know fits into a uint256.
                _balances[to] += value;
            }
        }

        emit Transfer(from, to, value);
    }

    /**
     * @dev Creates a `value` amount of tokens and assigns them to `account`, by transferring it from address(0).
     * Relies on the `_update` mechanism
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * NOTE: This function is not virtual, {_update} should be overridden instead.
     */
    function _mint(address account, uint256 value) internal {
        if (account == address(0)) {
            revert ERC20InvalidReceiver(address(0));
        }
        _update(address(0), account, value);
    }

    /**
     * @dev Destroys a `value` amount of tokens from `account`, lowering the total supply.
     * Relies on the `_update` mechanism.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * NOTE: This function is not virtual, {_update} should be overridden instead
     */
    function _burn(address account, uint256 value) internal {
        if (account == address(0)) {
            revert ERC20InvalidSender(address(0));
        }
        _update(account, address(0), value);
    }

    /**
     * @dev Sets `value` as the allowance of `spender` over the `owner`'s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     *
     * Overrides to this logic should be done to the variant with an additional `bool emitEvent` argument.
     */
    function _approve(address owner, address spender, uint256 value) internal {
        _approve(owner, spender, value, true);
    }

    /**
     * @dev Variant of {_approve} with an optional flag to enable or disable the {Approval} event.
     *
     * By default (when calling {_approve}) the flag is set to true. On the other hand, approval changes made by
     * `_spendAllowance` during the `transferFrom` operation set the flag to false. This saves gas by not emitting any
     * `Approval` event during `transferFrom` operations.
     *
     * Anyone who wishes to continue emitting `Approval` events on the`transferFrom` operation can force the flag to
     * true using the following override:
     *
     * ```solidity
     * function _approve(address owner, address spender, uint256 value, bool) internal virtual override {
     *     super._approve(owner, spender, value, true);
     * }
     * ```
     *
     * Requirements are the same as {_approve}.
     */
    function _approve(address owner, address spender, uint256 value, bool emitEvent) internal virtual {
        if (owner == address(0)) {
            revert ERC20InvalidApprover(address(0));
        }
        if (spender == address(0)) {
            revert ERC20InvalidSpender(address(0));
        }
        _allowances[owner][spender] = value;
        if (emitEvent) {
            emit Approval(owner, spender, value);
        }
    }

    /**
     * @dev Updates `owner`'s allowance for `spender` based on spent `value`.
     *
     * Does not update the allowance value in case of infinite allowance.
     * Revert if not enough allowance is available.
     *
     * Does not emit an {Approval} event.
     */
    function _spendAllowance(address owner, address spender, uint256 value) internal virtual {
        uint256 currentAllowance = allowance(owner, spender);
        if (currentAllowance < type(uint256).max) {
            if (currentAllowance < value) {
                revert ERC20InsufficientAllowance(spender, currentAllowance, value);
            }
            unchecked {
                _approve(owner, spender, currentAllowance - value, false);
            }
        }
    }
}

// SPDX-License-Identifier: AGPL-3.0
pragma solidity >=0.8.18;

import {ERC20} from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import {IERC4626} from "@openzeppelin/contracts/interfaces/IERC4626.sol";
import {IERC20Permit} from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Permit.sol";

// Interface that implements the 4626 standard and the implementation functions
interface ITokenizedStrategy is IERC4626, IERC20Permit {
    /*//////////////////////////////////////////////////////////////
                                 EVENTS
    //////////////////////////////////////////////////////////////*/

    event StrategyShutdown();

    event NewTokenizedStrategy(
        address indexed strategy,
        address indexed asset,
        string apiVersion
    );

    event Reported(
        uint256 profit,
        uint256 loss,
        uint256 protocolFees,
        uint256 performanceFees
    );

    event UpdatePerformanceFeeRecipient(
        address indexed newPerformanceFeeRecipient
    );

    event UpdateKeeper(address indexed newKeeper);

    event UpdatePerformanceFee(uint16 newPerformanceFee);

    event UpdateManagement(address indexed newManagement);

    event UpdateEmergencyAdmin(address indexed newEmergencyAdmin);

    event UpdateProfitMaxUnlockTime(uint256 newProfitMaxUnlockTime);

    event UpdatePendingManagement(address indexed newPendingManagement);

    /*//////////////////////////////////////////////////////////////
                           INITIALIZATION
    //////////////////////////////////////////////////////////////*/

    function initialize(
        address _asset,
        string memory _name,
        address _management,
        address _performanceFeeRecipient,
        address _keeper
    ) external;

    /*//////////////////////////////////////////////////////////////
                    NON-STANDARD 4626 OPTIONS
    //////////////////////////////////////////////////////////////*/

    function withdraw(
        uint256 assets,
        address receiver,
        address owner,
        uint256 maxLoss
    ) external returns (uint256);

    function redeem(
        uint256 shares,
        address receiver,
        address owner,
        uint256 maxLoss
    ) external returns (uint256);

    function maxWithdraw(
        address owner,
        uint256 /*maxLoss*/
    ) external view returns (uint256);

    function maxRedeem(
        address owner,
        uint256 /*maxLoss*/
    ) external view returns (uint256);

    /*//////////////////////////////////////////////////////////////
                        MODIFIER HELPERS
    //////////////////////////////////////////////////////////////*/

    function requireManagement(address _sender) external view;

    function requireKeeperOrManagement(address _sender) external view;

    function requireEmergencyAuthorized(address _sender) external view;

    /*//////////////////////////////////////////////////////////////
                        KEEPERS FUNCTIONS
    //////////////////////////////////////////////////////////////*/

    function tend() external;

    function report() external returns (uint256 _profit, uint256 _loss);

    /*//////////////////////////////////////////////////////////////
                        CONSTANTS
    //////////////////////////////////////////////////////////////*/

    function MAX_FEE() external view returns (uint16);

    function FACTORY() external view returns (address);

    /*//////////////////////////////////////////////////////////////
                            GETTERS
    //////////////////////////////////////////////////////////////*/

    function apiVersion() external view returns (string memory);

    function pricePerShare() external view returns (uint256);

    function management() external view returns (address);

    function pendingManagement() external view returns (address);

    function keeper() external view returns (address);

    function emergencyAdmin() external view returns (address);

    function performanceFee() external view returns (uint16);

    function performanceFeeRecipient() external view returns (address);

    function fullProfitUnlockDate() external view returns (uint256);

    function profitUnlockingRate() external view returns (uint256);

    function profitMaxUnlockTime() external view returns (uint256);

    function lastReport() external view returns (uint256);

    function isShutdown() external view returns (bool);

    function unlockedShares() external view returns (uint256);

    /*//////////////////////////////////////////////////////////////
                            SETTERS
    //////////////////////////////////////////////////////////////*/

    function setPendingManagement(address) external;

    function acceptManagement() external;

    function setKeeper(address _keeper) external;

    function setEmergencyAdmin(address _emergencyAdmin) external;

    function setPerformanceFee(uint16 _performanceFee) external;

    function setPerformanceFeeRecipient(
        address _performanceFeeRecipient
    ) external;

    function setProfitMaxUnlockTime(uint256 _profitMaxUnlockTime) external;

    function setName(string calldata _newName) external;

    function shutdownStrategy() external;

    function emergencyWithdraw(uint256 _amount) external;
}

// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";

interface IPPrincipalToken is IERC20Metadata {
    function burnByYT(address user, uint256 amount) external;

    function mintByYT(address user, uint256 amount) external;

    function initialize(address _YT) external;

    function SY() external view returns (address);

    function YT() external view returns (address);

    function factory() external view returns (address);

    function expiry() external view returns (uint256);

    function isExpired() external view returns (bool);
}

// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";
import "./IRewardManager.sol";
import "./IPInterestManagerYT.sol";

interface IPYieldToken is IERC20Metadata, IRewardManager, IPInterestManagerYT {
    event NewInterestIndex(uint256 indexed newIndex);

    event Mint(
        address indexed caller,
        address indexed receiverPT,
        address indexed receiverYT,
        uint256 amountSyToMint,
        uint256 amountPYOut
    );

    event Burn(address indexed caller, address indexed receiver, uint256 amountPYToRedeem, uint256 amountSyOut);

    event RedeemRewards(address indexed user, uint256[] amountRewardsOut);

    event RedeemInterest(address indexed user, uint256 interestOut);

    event CollectRewardFee(address indexed rewardToken, uint256 amountRewardFee);

    function mintPY(address receiverPT, address receiverYT) external returns (uint256 amountPYOut);

    function redeemPY(address receiver) external returns (uint256 amountSyOut);

    function redeemPYMulti(
        address[] calldata receivers,
        uint256[] calldata amountPYToRedeems
    ) external returns (uint256[] memory amountSyOuts);

    function redeemDueInterestAndRewards(
        address user,
        bool redeemInterest,
        bool redeemRewards
    ) external returns (uint256 interestOut, uint256[] memory rewardsOut);

    function rewardIndexesCurrent() external returns (uint256[] memory);

    function pyIndexCurrent() external returns (uint256);

    function pyIndexStored() external view returns (uint256);

    function getRewardTokens() external view returns (address[] memory);

    function SY() external view returns (address);

    function PT() external view returns (address);

    function factory() external view returns (address);

    function expiry() external view returns (uint256);

    function isExpired() external view returns (bool);

    function doCacheIndexSameBlock() external view returns (bool);

    function pyIndexLastUpdatedBlock() external view returns (uint128);
}

// SPDX-License-Identifier: GPL-3.0-or-later
/*
 * MIT License
 * ===========
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 */

pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";

interface IStandardizedYield is IERC20Metadata {
    /// @dev Emitted when any base tokens is deposited to mint shares
    event Deposit(
        address indexed caller,
        address indexed receiver,
        address indexed tokenIn,
        uint256 amountDeposited,
        uint256 amountSyOut
    );

    /// @dev Emitted when any shares are redeemed for base tokens
    event Redeem(
        address indexed caller,
        address indexed receiver,
        address indexed tokenOut,
        uint256 amountSyToRedeem,
        uint256 amountTokenOut
    );

    /// @dev check `assetInfo()` for more information
    enum AssetType {
        TOKEN,
        LIQUIDITY
    }

    /// @dev Emitted when (`user`) claims their rewards
    event ClaimRewards(address indexed user, address[] rewardTokens, uint256[] rewardAmounts);

    /**
     * @notice mints an amount of shares by depositing a base token.
     * @param receiver shares recipient address
     * @param tokenIn address of the base tokens to mint shares
     * @param amountTokenToDeposit amount of base tokens to be transferred from (`msg.sender`)
     * @param minSharesOut reverts if amount of shares minted is lower than this
     * @return amountSharesOut amount of shares minted
     * @dev Emits a {Deposit} event
     *
     * Requirements:
     * - (`tokenIn`) must be a valid base token.
     */
    function deposit(
        address receiver,
        address tokenIn,
        uint256 amountTokenToDeposit,
        uint256 minSharesOut
    ) external payable returns (uint256 amountSharesOut);

    /**
     * @notice redeems an amount of base tokens by burning some shares
     * @param receiver recipient address
     * @param amountSharesToRedeem amount of shares to be burned
     * @param tokenOut address of the base token to be redeemed
     * @param minTokenOut reverts if amount of base token redeemed is lower than this
     * @param burnFromInternalBalance if true, burns from balance of `address(this)`, otherwise burns from `msg.sender`
     * @return amountTokenOut amount of base tokens redeemed
     * @dev Emits a {Redeem} event
     *
     * Requirements:
     * - (`tokenOut`) must be a valid base token.
     */
    function redeem(
        address receiver,
        uint256 amountSharesToRedeem,
        address tokenOut,
        uint256 minTokenOut,
        bool burnFromInternalBalance
    ) external returns (uint256 amountTokenOut);

    /**
     * @notice exchangeRate * syBalance / 1e18 must return the asset balance of the account
     * @notice vice-versa, if a user uses some amount of tokens equivalent to X asset, the amount of sy
     he can mint must be X * exchangeRate / 1e18
     * @dev SYUtils's assetToSy & syToAsset should be used instead of raw multiplication
     & division
     */
    function exchangeRate() external view returns (uint256 res);

    /**
     * @notice claims reward for (`user`)
     * @param user the user receiving their rewards
     * @return rewardAmounts an array of reward amounts in the same order as `getRewardTokens`
     * @dev
     * Emits a `ClaimRewards` event
     * See {getRewardTokens} for list of reward tokens
     */
    function claimRewards(address user) external returns (uint256[] memory rewardAmounts);

    /**
     * @notice get the amount of unclaimed rewards for (`user`)
     * @param user the user to check for
     * @return rewardAmounts an array of reward amounts in the same order as `getRewardTokens`
     */
    function accruedRewards(address user) external view returns (uint256[] memory rewardAmounts);

    function rewardIndexesCurrent() external returns (uint256[] memory indexes);

    function rewardIndexesStored() external view returns (uint256[] memory indexes);

    /**
     * @notice returns the list of reward token addresses
     */
    function getRewardTokens() external view returns (address[] memory);

    /**
     * @notice returns the address of the underlying yield token
     */
    function yieldToken() external view returns (address);

    /**
     * @notice returns all tokens that can mint this SY
     */
    function getTokensIn() external view returns (address[] memory res);

    /**
     * @notice returns all tokens that can be redeemed by this SY
     */
    function getTokensOut() external view returns (address[] memory res);

    function isValidTokenIn(address token) external view returns (bool);

    function isValidTokenOut(address token) external view returns (bool);

    function previewDeposit(
        address tokenIn,
        uint256 amountTokenToDeposit
    ) external view returns (uint256 amountSharesOut);

    function previewRedeem(
        address tokenOut,
        uint256 amountSharesToRedeem
    ) external view returns (uint256 amountTokenOut);

    /**
     * @notice This function contains information to interpret what the asset is
     * @return assetType the type of the asset (0 for ERC20 tokens, 1 for AMM liquidity tokens,
        2 for bridged yield bearing tokens like wstETH, rETH on Arbi whose the underlying asset doesn't exist on the chain)
     * @return assetAddress the address of the asset
     * @return assetDecimals the decimals of the asset
     */
    function assetInfo() external view returns (AssetType assetType, address assetAddress, uint8 assetDecimals);
}

// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.0;

interface IPGauge {
    function totalActiveSupply() external view returns (uint256);

    function activeBalance(address user) external view returns (uint256);

    // only available for newer factories. please check the verified contracts
    event RedeemRewards(address indexed user, uint256[] rewardsOut);
}

// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.0;

import "../libraries/math/PMath.sol";
import "../libraries/math/LogExpMath.sol";

import "../StandardizedYield/PYIndex.sol";
import "../libraries/MiniHelpers.sol";
import "../libraries/Errors.sol";

struct MarketState {
    int256 totalPt;
    int256 totalSy;
    int256 totalLp;
    address treasury;
    /// immutable variables ///
    int256 scalarRoot;
    uint256 expiry;
    /// fee data ///
    uint256 lnFeeRateRoot;
    uint256 reserveFeePercent; // base 100
    /// last trade data ///
    uint256 lastLnImpliedRate;
}

// params that are expensive to compute, therefore we pre-compute them
struct MarketPreCompute {
    int256 rateScalar;
    int256 totalAsset;
    int256 rateAnchor;
    int256 feeRate;
}

// solhint-disable ordering
library MarketMathCore {
    using PMath for uint256;
    using PMath for int256;
    using LogExpMath for int256;
    using PYIndexLib for PYIndex;

    int256 internal constant MINIMUM_LIQUIDITY = 10 ** 3;
    int256 internal constant PERCENTAGE_DECIMALS = 100;
    uint256 internal constant DAY = 86400;
    uint256 internal constant IMPLIED_RATE_TIME = 365 * DAY;

    int256 internal constant MAX_MARKET_PROPORTION = (1e18 * 96) / 100;

    using PMath for uint256;
    using PMath for int256;

    /*///////////////////////////////////////////////////////////////
                UINT FUNCTIONS TO PROXY TO CORE FUNCTIONS
    //////////////////////////////////////////////////////////////*/

    function addLiquidity(
        MarketState memory market,
        uint256 syDesired,
        uint256 ptDesired,
        uint256 blockTime
    ) internal pure returns (uint256 lpToReserve, uint256 lpToAccount, uint256 syUsed, uint256 ptUsed) {
        (int256 _lpToReserve, int256 _lpToAccount, int256 _syUsed, int256 _ptUsed) = addLiquidityCore(
            market,
            syDesired.Int(),
            ptDesired.Int(),
            blockTime
        );

        lpToReserve = _lpToReserve.Uint();
        lpToAccount = _lpToAccount.Uint();
        syUsed = _syUsed.Uint();
        ptUsed = _ptUsed.Uint();
    }

    function removeLiquidity(
        MarketState memory market,
        uint256 lpToRemove
    ) internal pure returns (uint256 netSyToAccount, uint256 netPtToAccount) {
        (int256 _syToAccount, int256 _ptToAccount) = removeLiquidityCore(market, lpToRemove.Int());

        netSyToAccount = _syToAccount.Uint();
        netPtToAccount = _ptToAccount.Uint();
    }

    function swapExactPtForSy(
        MarketState memory market,
        PYIndex index,
        uint256 exactPtToMarket,
        uint256 blockTime
    ) internal pure returns (uint256 netSyToAccount, uint256 netSyFee, uint256 netSyToReserve) {
        (int256 _netSyToAccount, int256 _netSyFee, int256 _netSyToReserve) = executeTradeCore(
            market,
            index,
            exactPtToMarket.neg(),
            blockTime
        );

        netSyToAccount = _netSyToAccount.Uint();
        netSyFee = _netSyFee.Uint();
        netSyToReserve = _netSyToReserve.Uint();
    }

    function swapSyForExactPt(
        MarketState memory market,
        PYIndex index,
        uint256 exactPtToAccount,
        uint256 blockTime
    ) internal pure returns (uint256 netSyToMarket, uint256 netSyFee, uint256 netSyToReserve) {
        (int256 _netSyToAccount, int256 _netSyFee, int256 _netSyToReserve) = executeTradeCore(
            market,
            index,
            exactPtToAccount.Int(),
            blockTime
        );

        netSyToMarket = _netSyToAccount.neg().Uint();
        netSyFee = _netSyFee.Uint();
        netSyToReserve = _netSyToReserve.Uint();
    }

    /*///////////////////////////////////////////////////////////////
                    CORE FUNCTIONS
    //////////////////////////////////////////////////////////////*/

    function addLiquidityCore(
        MarketState memory market,
        int256 syDesired,
        int256 ptDesired,
        uint256 blockTime
    ) internal pure returns (int256 lpToReserve, int256 lpToAccount, int256 syUsed, int256 ptUsed) {
        /// ------------------------------------------------------------
        /// CHECKS
        /// ------------------------------------------------------------
        if (syDesired == 0 || ptDesired == 0) revert Errors.MarketZeroAmountsInput();
        if (MiniHelpers.isExpired(market.expiry, blockTime)) revert Errors.MarketExpired();

        /// ------------------------------------------------------------
        /// MATH
        /// ------------------------------------------------------------
        if (market.totalLp == 0) {
            lpToAccount = PMath.sqrt((syDesired * ptDesired).Uint()).Int() - MINIMUM_LIQUIDITY;
            lpToReserve = MINIMUM_LIQUIDITY;
            syUsed = syDesired;
            ptUsed = ptDesired;
        } else {
            int256 netLpByPt = (ptDesired * market.totalLp) / market.totalPt;
            int256 netLpBySy = (syDesired * market.totalLp) / market.totalSy;
            if (netLpByPt < netLpBySy) {
                lpToAccount = netLpByPt;
                ptUsed = ptDesired;
                syUsed = (market.totalSy * lpToAccount).rawDivUp(market.totalLp);
            } else {
                lpToAccount = netLpBySy;
                syUsed = syDesired;
                ptUsed = (market.totalPt * lpToAccount).rawDivUp(market.totalLp);
            }
        }

        if (lpToAccount <= 0 || syUsed <= 0 || ptUsed <= 0) revert Errors.MarketZeroAmountsOutput();

        /// ------------------------------------------------------------
        /// WRITE
        /// ------------------------------------------------------------
        market.totalSy += syUsed;
        market.totalPt += ptUsed;
        market.totalLp += lpToAccount + lpToReserve;
    }

    function removeLiquidityCore(
        MarketState memory market,
        int256 lpToRemove
    ) internal pure returns (int256 netSyToAccount, int256 netPtToAccount) {
        /// ------------------------------------------------------------
        /// CHECKS
        /// ------------------------------------------------------------
        if (lpToRemove == 0) revert Errors.MarketZeroAmountsInput();

        /// ------------------------------------------------------------
        /// MATH
        /// ------------------------------------------------------------
        netSyToAccount = (lpToRemove * market.totalSy) / market.totalLp;
        netPtToAccount = (lpToRemove * market.totalPt) / market.totalLp;

        if (netSyToAccount == 0 && netPtToAccount == 0) revert Errors.MarketZeroAmountsOutput();

        /// ------------------------------------------------------------
        /// WRITE
        /// ------------------------------------------------------------
        market.totalLp = market.totalLp.subNoNeg(lpToRemove);
        market.totalPt = market.totalPt.subNoNeg(netPtToAccount);
        market.totalSy = market.totalSy.subNoNeg(netSyToAccount);
    }

    function executeTradeCore(
        MarketState memory market,
        PYIndex index,
        int256 netPtToAccount,
        uint256 blockTime
    ) internal pure returns (int256 netSyToAccount, int256 netSyFee, int256 netSyToReserve) {
        /// ------------------------------------------------------------
        /// CHECKS
        /// ------------------------------------------------------------
        if (MiniHelpers.isExpired(market.expiry, blockTime)) revert Errors.MarketExpired();
        if (market.totalPt <= netPtToAccount)
            revert Errors.MarketInsufficientPtForTrade(market.totalPt, netPtToAccount);

        /// ------------------------------------------------------------
        /// MATH
        /// ------------------------------------------------------------
        MarketPreCompute memory comp = getMarketPreCompute(market, index, blockTime);

        (netSyToAccount, netSyFee, netSyToReserve) = calcTrade(market, comp, index, netPtToAccount);

        /// ------------------------------------------------------------
        /// WRITE
        /// ------------------------------------------------------------
        _setNewMarketStateTrade(market, comp, index, netPtToAccount, netSyToAccount, netSyToReserve, blockTime);
    }

    function getMarketPreCompute(
        MarketState memory market,
        PYIndex index,
        uint256 blockTime
    ) internal pure returns (MarketPreCompute memory res) {
        if (MiniHelpers.isExpired(market.expiry, blockTime)) revert Errors.MarketExpired();

        uint256 timeToExpiry = market.expiry - blockTime;

        res.rateScalar = _getRateScalar(market, timeToExpiry);
        res.totalAsset = index.syToAsset(market.totalSy);

        if (market.totalPt == 0 || res.totalAsset == 0)
            revert Errors.MarketZeroTotalPtOrTotalAsset(market.totalPt, res.totalAsset);

        res.rateAnchor = _getRateAnchor(
            market.totalPt,
            market.lastLnImpliedRate,
            res.totalAsset,
            res.rateScalar,
            timeToExpiry
        );
        res.feeRate = _getExchangeRateFromImpliedRate(market.lnFeeRateRoot, timeToExpiry);
    }

    function calcTrade(
        MarketState memory market,
        MarketPreCompute memory comp,
        PYIndex index,
        int256 netPtToAccount
    ) internal pure returns (int256 netSyToAccount, int256 netSyFee, int256 netSyToReserve) {
        int256 preFeeExchangeRate = _getExchangeRate(
            market.totalPt,
            comp.totalAsset,
            comp.rateScalar,
            comp.rateAnchor,
            netPtToAccount
        );

        int256 preFeeAssetToAccount = netPtToAccount.divDown(preFeeExchangeRate).neg();
        int256 fee = comp.feeRate;

        if (netPtToAccount > 0) {
            int256 postFeeExchangeRate = preFeeExchangeRate.divDown(fee);
            if (postFeeExchangeRate < PMath.IONE) revert Errors.MarketExchangeRateBelowOne(postFeeExchangeRate);

            fee = preFeeAssetToAccount.mulDown(PMath.IONE - fee);
        } else {
            fee = ((preFeeAssetToAccount * (PMath.IONE - fee)) / fee).neg();
        }

        int256 netAssetToReserve = (fee * market.reserveFeePercent.Int()) / PERCENTAGE_DECIMALS;
        int256 netAssetToAccount = preFeeAssetToAccount - fee;

        netSyToAccount = netAssetToAccount < 0
            ? index.assetToSyUp(netAssetToAccount)
            : index.assetToSy(netAssetToAccount);
        netSyFee = index.assetToSy(fee);
        netSyToReserve = index.assetToSy(netAssetToReserve);
    }

    function _setNewMarketStateTrade(
        MarketState memory market,
        MarketPreCompute memory comp,
        PYIndex index,
        int256 netPtToAccount,
        int256 netSyToAccount,
        int256 netSyToReserve,
        uint256 blockTime
    ) internal pure {
        uint256 timeToExpiry = market.expiry - blockTime;

        market.totalPt = market.totalPt.subNoNeg(netPtToAccount);
        market.totalSy = market.totalSy.subNoNeg(netSyToAccount + netSyToReserve);

        market.lastLnImpliedRate = _getLnImpliedRate(
            market.totalPt,
            index.syToAsset(market.totalSy),
            comp.rateScalar,
            comp.rateAnchor,
            timeToExpiry
        );

        if (market.lastLnImpliedRate == 0) revert Errors.MarketZeroLnImpliedRate();
    }

    function _getRateAnchor(
        int256 totalPt,
        uint256 lastLnImpliedRate,
        int256 totalAsset,
        int256 rateScalar,
        uint256 timeToExpiry
    ) internal pure returns (int256 rateAnchor) {
        int256 newExchangeRate = _getExchangeRateFromImpliedRate(lastLnImpliedRate, timeToExpiry);

        if (newExchangeRate < PMath.IONE) revert Errors.MarketExchangeRateBelowOne(newExchangeRate);

        {
            int256 proportion = totalPt.divDown(totalPt + totalAsset);

            int256 lnProportion = _logProportion(proportion);

            rateAnchor = newExchangeRate - lnProportion.divDown(rateScalar);
        }
    }

    /// @notice Calculates the current market implied rate.
    /// @return lnImpliedRate the implied rate
    function _getLnImpliedRate(
        int256 totalPt,
        int256 totalAsset,
        int256 rateScalar,
        int256 rateAnchor,
        uint256 timeToExpiry
    ) internal pure returns (uint256 lnImpliedRate) {
        // This will check for exchange rates < PMath.IONE
        int256 exchangeRate = _getExchangeRate(totalPt, totalAsset, rateScalar, rateAnchor, 0);

        // exchangeRate >= 1 so its ln >= 0
        uint256 lnRate = exchangeRate.ln().Uint();

        lnImpliedRate = (lnRate * IMPLIED_RATE_TIME) / timeToExpiry;
    }

    /// @notice Converts an implied rate to an exchange rate given a time to expiry. The
    /// formula is E = e^rt
    function _getExchangeRateFromImpliedRate(
        uint256 lnImpliedRate,
        uint256 timeToExpiry
    ) internal pure returns (int256 exchangeRate) {
        uint256 rt = (lnImpliedRate * timeToExpiry) / IMPLIED_RATE_TIME;

        exchangeRate = LogExpMath.exp(rt.Int());
    }

    function _getExchangeRate(
        int256 totalPt,
        int256 totalAsset,
        int256 rateScalar,
        int256 rateAnchor,
        int256 netPtToAccount
    ) internal pure returns (int256 exchangeRate) {
        int256 numerator = totalPt.subNoNeg(netPtToAccount);

        int256 proportion = (numerator.divDown(totalPt + totalAsset));

        if (proportion > MAX_MARKET_PROPORTION)
            revert Errors.MarketProportionTooHigh(proportion, MAX_MARKET_PROPORTION);

        int256 lnProportion = _logProportion(proportion);

        exchangeRate = lnProportion.divDown(rateScalar) + rateAnchor;

        if (exchangeRate < PMath.IONE) revert Errors.MarketExchangeRateBelowOne(exchangeRate);
    }

    function _logProportion(int256 proportion) internal pure returns (int256 res) {
        if (proportion == PMath.IONE) revert Errors.MarketProportionMustNotEqualOne();

        int256 logitP = proportion.divDown(PMath.IONE - proportion);

        res = logitP.ln();
    }

    function _getRateScalar(MarketState memory market, uint256 timeToExpiry) internal pure returns (int256 rateScalar) {
        rateScalar = (market.scalarRoot * IMPLIED_RATE_TIME.Int()) / timeToExpiry.Int();
        if (rateScalar <= 0) revert Errors.MarketRateScalarBelowZero(rateScalar);
    }

    function setInitialLnImpliedRate(
        MarketState memory market,
        PYIndex index,
        int256 initialAnchor,
        uint256 blockTime
    ) internal pure {
        /// ------------------------------------------------------------
        /// CHECKS
        /// ------------------------------------------------------------
        if (MiniHelpers.isExpired(market.expiry, blockTime)) revert Errors.MarketExpired();

        /// ------------------------------------------------------------
        /// MATH
        /// ------------------------------------------------------------
        int256 totalAsset = index.syToAsset(market.totalSy);
        uint256 timeToExpiry = market.expiry - blockTime;
        int256 rateScalar = _getRateScalar(market, timeToExpiry);

        /// ------------------------------------------------------------
        /// WRITE
        /// ------------------------------------------------------------
        market.lastLnImpliedRate = _getLnImpliedRate(
            market.totalPt,
            totalAsset,
            rateScalar,
            initialAnchor,
            timeToExpiry
        );
    }
}

// SPDX-License-Identifier: GPL-3.0-or-later
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

pragma solidity ^0.8.0;

/* solhint-disable private-vars-leading-underscore, reason-string */

library PMath {
    uint256 internal constant ONE = 1e18; // 18 decimal places
    int256 internal constant IONE = 1e18; // 18 decimal places

    function subMax0(uint256 a, uint256 b) internal pure returns (uint256) {
        unchecked {
            return (a >= b ? a - b : 0);
        }
    }

    function subNoNeg(int256 a, int256 b) internal pure returns (int256) {
        require(a >= b, "negative");
        return a - b; // no unchecked since if b is very negative, a - b might overflow
    }

    function mulDown(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 product = a * b;
        unchecked {
            return product / ONE;
        }
    }

    function mulDown(int256 a, int256 b) internal pure returns (int256) {
        int256 product = a * b;
        unchecked {
            return product / IONE;
        }
    }

    function divDown(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 aInflated = a * ONE;
        unchecked {
            return aInflated / b;
        }
    }

    function divDown(int256 a, int256 b) internal pure returns (int256) {
        int256 aInflated = a * IONE;
        unchecked {
            return aInflated / b;
        }
    }

    function rawDivUp(uint256 a, uint256 b) internal pure returns (uint256) {
        return (a + b - 1) / b;
    }

    function rawDivUp(int256 a, int256 b) internal pure returns (int256) {
        return (a + b - 1) / b;
    }

    function tweakUp(uint256 a, uint256 factor) internal pure returns (uint256) {
        return mulDown(a, ONE + factor);
    }

    function tweakDown(uint256 a, uint256 factor) internal pure returns (uint256) {
        return mulDown(a, ONE - factor);
    }

    /// @return res = min(a + b, bound)
    /// @dev This function should handle arithmetic operation and bound check without overflow/underflow
    function addWithUpperBound(uint256 a, uint256 b, uint256 bound) internal pure returns (uint256 res) {
        unchecked {
            if (type(uint256).max - b < a) res = bound;
            else res = min(bound, a + b);
        }
    }

    /// @return res = max(a - b, bound)
    /// @dev This function should handle arithmetic operation and bound check without overflow/underflow
    function subWithLowerBound(uint256 a, uint256 b, uint256 bound) internal pure returns (uint256 res) {
        unchecked {
            if (b > a) res = bound;
            else res = max(a - b, bound);
        }
    }

    function clamp(uint256 x, uint256 lower, uint256 upper) internal pure returns (uint256 res) {
        res = x;
        if (x < lower) res = lower;
        else if (x > upper) res = upper;
    }

    // @author Uniswap
    function sqrt(uint256 y) internal pure returns (uint256 z) {
        if (y > 3) {
            z = y;
            uint256 x = y / 2 + 1;
            while (x < z) {
                z = x;
                x = (y / x + x) / 2;
            }
        } else if (y != 0) {
            z = 1;
        }
    }

    function square(uint256 x) internal pure returns (uint256) {
        return x * x;
    }

    function squareDown(uint256 x) internal pure returns (uint256) {
        return mulDown(x, x);
    }

    function abs(int256 x) internal pure returns (uint256) {
        return uint256(x > 0 ? x : -x);
    }

    function neg(int256 x) internal pure returns (int256) {
        return x * (-1);
    }

    function neg(uint256 x) internal pure returns (int256) {
        return Int(x) * (-1);
    }

    function max(uint256 x, uint256 y) internal pure returns (uint256) {
        return (x > y ? x : y);
    }

    function max(int256 x, int256 y) internal pure returns (int256) {
        return (x > y ? x : y);
    }

    function min(uint256 x, uint256 y) internal pure returns (uint256) {
        return (x < y ? x : y);
    }

    function min(int256 x, int256 y) internal pure returns (int256) {
        return (x < y ? x : y);
    }

    /*///////////////////////////////////////////////////////////////
                               SIGNED CASTS
    //////////////////////////////////////////////////////////////*/

    function Int(uint256 x) internal pure returns (int256) {
        require(x <= uint256(type(int256).max));
        return int256(x);
    }

    function Int128(int256 x) internal pure returns (int128) {
        require(type(int128).min <= x && x <= type(int128).max);
        return int128(x);
    }

    function Int128(uint256 x) internal pure returns (int128) {
        return Int128(Int(x));
    }

    /*///////////////////////////////////////////////////////////////
                               UNSIGNED CASTS
    //////////////////////////////////////////////////////////////*/

    function Uint(int256 x) internal pure returns (uint256) {
        require(x >= 0);
        return uint256(x);
    }

    function Uint32(uint256 x) internal pure returns (uint32) {
        require(x <= type(uint32).max);
        return uint32(x);
    }

    function Uint64(uint256 x) internal pure returns (uint64) {
        require(x <= type(uint64).max);
        return uint64(x);
    }

    function Uint112(uint256 x) internal pure returns (uint112) {
        require(x <= type(uint112).max);
        return uint112(x);
    }

    function Uint96(uint256 x) internal pure returns (uint96) {
        require(x <= type(uint96).max);
        return uint96(x);
    }

    function Uint128(uint256 x) internal pure returns (uint128) {
        require(x <= type(uint128).max);
        return uint128(x);
    }

    function Uint192(uint256 x) internal pure returns (uint192) {
        require(x <= type(uint192).max);
        return uint192(x);
    }

    function Uint80(uint256 x) internal pure returns (uint80) {
        require(x <= type(uint80).max);
        return uint80(x);
    }

    function isAApproxB(uint256 a, uint256 b, uint256 eps) internal pure returns (bool) {
        return mulDown(b, ONE - eps) <= a && a <= mulDown(b, ONE + eps);
    }

    function isAGreaterApproxB(uint256 a, uint256 b, uint256 eps) internal pure returns (bool) {
        return a >= b && a <= mulDown(b, ONE + eps);
    }

    function isASmallerApproxB(uint256 a, uint256 b, uint256 eps) internal pure returns (bool) {
        return a <= b && a >= mulDown(b, ONE - eps);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC4626.sol)

pragma solidity ^0.8.20;

import {IERC20} from "../token/ERC20/IERC20.sol";
import {IERC20Metadata} from "../token/ERC20/extensions/IERC20Metadata.sol";

/**
 * @dev Interface of the ERC-4626 "Tokenized Vault Standard", as defined in
 * https://eips.ethereum.org/EIPS/eip-4626[ERC-4626].
 */
interface IERC4626 is IERC20, IERC20Metadata {
    event Deposit(address indexed sender, address indexed owner, uint256 assets, uint256 shares);

    event Withdraw(
        address indexed sender,
        address indexed receiver,
        address indexed owner,
        uint256 assets,
        uint256 shares
    );

    /**
     * @dev Returns the address of the underlying token used for the Vault for accounting, depositing, and withdrawing.
     *
     * - MUST be an ERC-20 token contract.
     * - MUST NOT revert.
     */
    function asset() external view returns (address assetTokenAddress);

    /**
     * @dev Returns the total amount of the underlying asset that is “managed” by Vault.
     *
     * - SHOULD include any compounding that occurs from yield.
     * - MUST be inclusive of any fees that are charged against assets in the Vault.
     * - MUST NOT revert.
     */
    function totalAssets() external view returns (uint256 totalManagedAssets);

    /**
     * @dev Returns the amount of shares that the Vault would exchange for the amount of assets provided, in an ideal
     * scenario where all the conditions are met.
     *
     * - MUST NOT be inclusive of any fees that are charged against assets in the Vault.
     * - MUST NOT show any variations depending on the caller.
     * - MUST NOT reflect slippage or other on-chain conditions, when performing the actual exchange.
     * - MUST NOT revert.
     *
     * NOTE: This calculation MAY NOT reflect the “per-user” price-per-share, and instead should reflect the
     * “average-user’s” price-per-share, meaning what the average user should expect to see when exchanging to and
     * from.
     */
    function convertToShares(uint256 assets) external view returns (uint256 shares);

    /**
     * @dev Returns the amount of assets that the Vault would exchange for the amount of shares provided, in an ideal
     * scenario where all the conditions are met.
     *
     * - MUST NOT be inclusive of any fees that are charged against assets in the Vault.
     * - MUST NOT show any variations depending on the caller.
     * - MUST NOT reflect slippage or other on-chain conditions, when performing the actual exchange.
     * - MUST NOT revert.
     *
     * NOTE: This calculation MAY NOT reflect the “per-user” price-per-share, and instead should reflect the
     * “average-user’s” price-per-share, meaning what the average user should expect to see when exchanging to and
     * from.
     */
    function convertToAssets(uint256 shares) external view returns (uint256 assets);

    /**
     * @dev Returns the maximum amount of the underlying asset that can be deposited into the Vault for the receiver,
     * through a deposit call.
     *
     * - MUST return a limited value if receiver is subject to some deposit limit.
     * - MUST return 2 ** 256 - 1 if there is no limit on the maximum amount of assets that may be deposited.
     * - MUST NOT revert.
     */
    function maxDeposit(address receiver) external view returns (uint256 maxAssets);

    /**
     * @dev Allows an on-chain or off-chain user to simulate the effects of their deposit at the current block, given
     * current on-chain conditions.
     *
     * - MUST return as close to and no more than the exact amount of Vault shares that would be minted in a deposit
     *   call in the same transaction. I.e. deposit should return the same or more shares as previewDeposit if called
     *   in the same transaction.
     * - MUST NOT account for deposit limits like those returned from maxDeposit and should always act as though the
     *   deposit would be accepted, regardless if the user has enough tokens approved, etc.
     * - MUST be inclusive of deposit fees. Integrators should be aware of the existence of deposit fees.
     * - MUST NOT revert.
     *
     * NOTE: any unfavorable discrepancy between convertToShares and previewDeposit SHOULD be considered slippage in
     * share price or some other type of condition, meaning the depositor will lose assets by depositing.
     */
    function previewDeposit(uint256 assets) external view returns (uint256 shares);

    /**
     * @dev Mints shares Vault shares to receiver by depositing exactly amount of underlying tokens.
     *
     * - MUST emit the Deposit event.
     * - MAY support an additional flow in which the underlying tokens are owned by the Vault contract before the
     *   deposit execution, and are accounted for during deposit.
     * - MUST revert if all of assets cannot be deposited (due to deposit limit being reached, slippage, the user not
     *   approving enough underlying tokens to the Vault contract, etc).
     *
     * NOTE: most implementations will require pre-approval of the Vault with the Vault’s underlying asset token.
     */
    function deposit(uint256 assets, address receiver) external returns (uint256 shares);

    /**
     * @dev Returns the maximum amount of the Vault shares that can be minted for the receiver, through a mint call.
     * - MUST return a limited value if receiver is subject to some mint limit.
     * - MUST return 2 ** 256 - 1 if there is no limit on the maximum amount of shares that may be minted.
     * - MUST NOT revert.
     */
    function maxMint(address receiver) external view returns (uint256 maxShares);

    /**
     * @dev Allows an on-chain or off-chain user to simulate the effects of their mint at the current block, given
     * current on-chain conditions.
     *
     * - MUST return as close to and no fewer than the exact amount of assets that would be deposited in a mint call
     *   in the same transaction. I.e. mint should return the same or fewer assets as previewMint if called in the
     *   same transaction.
     * - MUST NOT account for mint limits like those returned from maxMint and should always act as though the mint
     *   would be accepted, regardless if the user has enough tokens approved, etc.
     * - MUST be inclusive of deposit fees. Integrators should be aware of the existence of deposit fees.
     * - MUST NOT revert.
     *
     * NOTE: any unfavorable discrepancy between convertToAssets and previewMint SHOULD be considered slippage in
     * share price or some other type of condition, meaning the depositor will lose assets by minting.
     */
    function previewMint(uint256 shares) external view returns (uint256 assets);

    /**
     * @dev Mints exactly shares Vault shares to receiver by depositing amount of underlying tokens.
     *
     * - MUST emit the Deposit event.
     * - MAY support an additional flow in which the underlying tokens are owned by the Vault contract before the mint
     *   execution, and are accounted for during mint.
     * - MUST revert if all of shares cannot be minted (due to deposit limit being reached, slippage, the user not
     *   approving enough underlying tokens to the Vault contract, etc).
     *
     * NOTE: most implementations will require pre-approval of the Vault with the Vault’s underlying asset token.
     */
    function mint(uint256 shares, address receiver) external returns (uint256 assets);

    /**
     * @dev Returns the maximum amount of the underlying asset that can be withdrawn from the owner balance in the
     * Vault, through a withdraw call.
     *
     * - MUST return a limited value if owner is subject to some withdrawal limit or timelock.
     * - MUST NOT revert.
     */
    function maxWithdraw(address owner) external view returns (uint256 maxAssets);

    /**
     * @dev Allows an on-chain or off-chain user to simulate the effects of their withdrawal at the current block,
     * given current on-chain conditions.
     *
     * - MUST return as close to and no fewer than the exact amount of Vault shares that would be burned in a withdraw
     *   call in the same transaction. I.e. withdraw should return the same or fewer shares as previewWithdraw if
     *   called
     *   in the same transaction.
     * - MUST NOT account for withdrawal limits like those returned from maxWithdraw and should always act as though
     *   the withdrawal would be accepted, regardless if the user has enough shares, etc.
     * - MUST be inclusive of withdrawal fees. Integrators should be aware of the existence of withdrawal fees.
     * - MUST NOT revert.
     *
     * NOTE: any unfavorable discrepancy between convertToShares and previewWithdraw SHOULD be considered slippage in
     * share price or some other type of condition, meaning the depositor will lose assets by depositing.
     */
    function previewWithdraw(uint256 assets) external view returns (uint256 shares);

    /**
     * @dev Burns shares from owner and sends exactly assets of underlying tokens to receiver.
     *
     * - MUST emit the Withdraw event.
     * - MAY support an additional flow in which the underlying tokens are owned by the Vault contract before the
     *   withdraw execution, and are accounted for during withdraw.
     * - MUST revert if all of assets cannot be withdrawn (due to withdrawal limit being reached, slippage, the owner
     *   not having enough shares, etc).
     *
     * Note that some implementations will require pre-requesting to the Vault before a withdrawal may be performed.
     * Those methods should be performed separately.
     */
    function withdraw(uint256 assets, address receiver, address owner) external returns (uint256 shares);

    /**
     * @dev Returns the maximum amount of Vault shares that can be redeemed from the owner balance in the Vault,
     * through a redeem call.
     *
     * - MUST return a limited value if owner is subject to some withdrawal limit or timelock.
     * - MUST return balanceOf(owner) if owner is not subject to any withdrawal limit or timelock.
     * - MUST NOT revert.
     */
    function maxRedeem(address owner) external view returns (uint256 maxShares);

    /**
     * @dev Allows an on-chain or off-chain user to simulate the effects of their redeemption at the current block,
     * given current on-chain conditions.
     *
     * - MUST return as close to and no more than the exact amount of assets that would be withdrawn in a redeem call
     *   in the same transaction. I.e. redeem should return the same or more assets as previewRedeem if called in the
     *   same transaction.
     * - MUST NOT account for redemption limits like those returned from maxRedeem and should always act as though the
     *   redemption would be accepted, regardless if the user has enough shares, etc.
     * - MUST be inclusive of withdrawal fees. Integrators should be aware of the existence of withdrawal fees.
     * - MUST NOT revert.
     *
     * NOTE: any unfavorable discrepancy between convertToAssets and previewRedeem SHOULD be considered slippage in
     * share price or some other type of condition, meaning the depositor will lose assets by redeeming.
     */
    function previewRedeem(uint256 shares) external view returns (uint256 assets);

    /**
     * @dev Burns exactly shares from owner and sends assets of underlying tokens to receiver.
     *
     * - MUST emit the Withdraw event.
     * - MAY support an additional flow in which the underlying tokens are owned by the Vault contract before the
     *   redeem execution, and are accounted for during redeem.
     * - MUST revert if all of shares cannot be redeemed (due to withdrawal limit being reached, slippage, the owner
     *   not having enough shares, etc).
     *
     * NOTE: some implementations will require pre-requesting to the Vault before a withdrawal may be performed.
     * Those methods should be performed separately.
     */
    function redeem(uint256 shares, address receiver, address owner) external returns (uint256 assets);
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.5.0;

import {IERC3156FlashBorrower} from "./IERC3156FlashBorrower.sol";

/// @notice https://eips.ethereum.org/EIPS/eip-3156
interface IERC3156FlashLender {
    /// @notice Protected deposits are not available for a flash loan.
    /// During the execution of the flashloan, Silo methods are not taking into consideration the fact,
    /// that some (or all) tokens were transferred as flashloan, therefore some methods can return invalid state
    /// eg. maxWithdraw can return amount that are not available to withdraw during flashlon.
    /// @dev Initiate a flash loan.
    /// @param _receiver The receiver of the tokens in the loan, and the receiver of the callback.
    /// @param _token The loan currency.
    /// @param _amount The amount of tokens lent.
    /// @param _data Arbitrary data structure, intended to contain user-defined parameters.
    function flashLoan(IERC3156FlashBorrower _receiver, address _token, uint256 _amount, bytes calldata _data)
        external
        returns (bool);

    /// @dev The amount of currency available to be lent.
    /// @param _token The loan currency.
    /// @return The amount of `token` that can be borrowed.
    function maxFlashLoan(address _token) external view returns (uint256);

    /// @dev The fee to be charged for a given loan.
    /// @param _token The loan currency.
    /// @param _amount The amount of tokens lent.
    /// @return The amount of `token` to be charged for the loan, on top of the returned principal.
    function flashFee(address _token, uint256 _amount) external view returns (uint256);
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.5.0;

import {IERC721} from "openzeppelin5/interfaces/IERC721.sol";
import {ISiloConfig} from "./ISiloConfig.sol";

interface ISiloFactory is IERC721 {
    struct Range {
        uint128 min;
        uint128 max;
    }

    /// @notice Emitted on the creation of a Silo.
    /// @param implementation Address of the Silo implementation.
    /// @param token0 Address of the first Silo token.
    /// @param token1 Address of the second Silo token.
    /// @param silo0 Address of the first Silo.
    /// @param silo1 Address of the second Silo.
    /// @param siloConfig Address of the SiloConfig.
    event NewSilo(
        address indexed implementation,
        address indexed token0,
        address indexed token1,
        address silo0,
        address silo1,
        address siloConfig
    );

    event BaseURI(string newBaseURI);

    /// @notice Emitted on the update of DAO fee.
    /// @param minDaoFee Value of the new minimal DAO fee.
    /// @param maxDaoFee Value of the new maximal DAO fee.
    event DaoFeeChanged(uint128 minDaoFee, uint128 maxDaoFee);

    /// @notice Emitted on the update of max deployer fee.
    /// @param maxDeployerFee Value of the new max deployer fee.
    event MaxDeployerFeeChanged(uint256 maxDeployerFee);

    /// @notice Emitted on the update of max flashloan fee.
    /// @param maxFlashloanFee Value of the new max flashloan fee.
    event MaxFlashloanFeeChanged(uint256 maxFlashloanFee);

    /// @notice Emitted on the update of max liquidation fee.
    /// @param maxLiquidationFee Value of the new max liquidation fee.
    event MaxLiquidationFeeChanged(uint256 maxLiquidationFee);

    /// @notice Emitted on the change of DAO fee receiver.
    /// @param daoFeeReceiver Address of the new DAO fee receiver.
    event DaoFeeReceiverChanged(address daoFeeReceiver);

    /// @notice Emitted on the change of DAO fee receiver for particular silo
    /// @param silo Address for which new DAO fee receiver is set.
    /// @param daoFeeReceiver Address of the new DAO fee receiver.
    event DaoFeeReceiverChangedForSilo(address silo, address daoFeeReceiver);

    /// @notice Emitted on the change of DAO fee receiver for particular asset
    /// @param asset Address for which new DAO fee receiver is set.
    /// @param daoFeeReceiver Address of the new DAO fee receiver.
    event DaoFeeReceiverChangedForAsset(address asset, address daoFeeReceiver);

    error MissingHookReceiver();
    error ZeroAddress();
    error DaoFeeReceiverZeroAddress();
    error SameDaoFeeReceiver();
    error EmptyToken0();
    error EmptyToken1();
    error MaxFeeExceeded();
    error InvalidFeeRange();
    error SameAsset();
    error SameRange();
    error InvalidIrm();
    error InvalidMaxLtv();
    error InvalidLt();
    error InvalidDeployer();
    error DaoMinRangeExceeded();
    error DaoMaxRangeExceeded();
    error MaxDeployerFeeExceeded();
    error MaxFlashloanFeeExceeded();
    error MaxLiquidationFeeExceeded();
    error InvalidCallBeforeQuote();
    error OracleMisconfiguration();
    error InvalidQuoteToken();
    error HookIsZeroAddress();
    error LiquidationTargetLtvTooHigh();
    error NotYourSilo();
    error ConfigMismatchSilo();
    error ConfigMismatchShareProtectedToken();
    error ConfigMismatchShareDebtToken();
    error ConfigMismatchShareCollateralToken();

    /// @notice Create a new Silo.
    /// @param _siloConfig Silo configuration.
    /// @param _siloImpl Address of the `Silo` implementation.
    /// @param _shareProtectedCollateralTokenImpl Address of the `ShareProtectedCollateralToken` implementation.
    /// @param _shareDebtTokenImpl Address of the `ShareDebtToken` implementation.
    /// @param _deployer Address of the deployer.
    /// @param _creator Address of the creator.
    function createSilo(
        ISiloConfig _siloConfig,
        address _siloImpl,
        address _shareProtectedCollateralTokenImpl,
        address _shareDebtTokenImpl,
        address _deployer,
        address _creator
    )
        external;

    /// @notice NFT ownership represents the deployer fee receiver for the each Silo ID.  After burning, 
    /// the deployer fee is sent to the DAO. Burning doesn't affect Silo's behavior. It is only about fee distribution.
    /// @param _siloIdToBurn silo ID to burn.
    function burn(uint256 _siloIdToBurn) external;

    /// @notice Update the value of DAO fee. Updated value will be used only for a new Silos.
    /// Previously deployed SiloConfigs are immutable.
    /// @param _minFee Value of the new DAO minimal fee.
    /// @param _maxFee Value of the new DAO maximal fee.
    function setDaoFee(uint128 _minFee, uint128 _maxFee) external;

    /// @notice Set the default DAO fee receiver.
    /// @param _newDaoFeeReceiver Address of the new DAO fee receiver.
    function setDaoFeeReceiver(address _newDaoFeeReceiver) external;

    /// @notice Set the new DAO fee receiver for asset, this setup will be used when fee receiver for silo is empty.
    /// @param _asset Address for which new DAO fee receiver is set.
    /// @param _newDaoFeeReceiver Address of the new DAO fee receiver.
    function setDaoFeeReceiverForAsset(address _asset, address _newDaoFeeReceiver) external;

    /// @notice Set the new DAO fee receiver for silo. This setup has highest priority.
    /// @param _silo Address for which new DAO fee receiver is set.
    /// @param _newDaoFeeReceiver Address of the new DAO fee receiver.
    function setDaoFeeReceiverForSilo(address _silo, address _newDaoFeeReceiver) external;

    /// @notice Update the value of max deployer fee. Updated value will be used only for a new Silos max deployer
    /// fee validation. Previously deployed SiloConfigs are immutable.
    /// @param _newMaxDeployerFee Value of the new max deployer fee.
    function setMaxDeployerFee(uint256 _newMaxDeployerFee) external;

    /// @notice Update the value of max flashloan fee. Updated value will be used only for a new Silos max flashloan
    /// fee validation. Previously deployed SiloConfigs are immutable.
    /// @param _newMaxFlashloanFee Value of the new max flashloan fee.
    function setMaxFlashloanFee(uint256 _newMaxFlashloanFee) external;

    /// @notice Update the value of max liquidation fee. Updated value will be used only for a new Silos max
    /// liquidation fee validation. Previously deployed SiloConfigs are immutable.
    /// @param _newMaxLiquidationFee Value of the new max liquidation fee.
    function setMaxLiquidationFee(uint256 _newMaxLiquidationFee) external;
   
    /// @notice Update the base URI.
    /// @param _newBaseURI Value of the new base URI.
    function setBaseURI(string calldata _newBaseURI) external;

    /// @notice Acceptable DAO fee range for new Silos. Denominated in 18 decimals points. 1e18 == 100%.
    function daoFeeRange() external view returns (Range memory);

    /// @notice Max deployer fee for a new Silos. Denominated in 18 decimals points. 1e18 == 100%.
    function maxDeployerFee() external view returns (uint256);

    /// @notice Max flashloan fee for a new Silos. Denominated in 18 decimals points. 1e18 == 100%.
    function maxFlashloanFee() external view returns (uint256);

    /// @notice Max liquidation fee for a new Silos. Denominated in 18 decimals points. 1e18 == 100%.
    function maxLiquidationFee() external view returns (uint256);

    /// @notice The recipient of DAO fees.
    function daoFeeReceiver() external view returns (address);

    /// @notice Get SiloConfig address by Silo id.
    function idToSiloConfig(uint256 _id) external view returns (address);

    /// @notice Get the counter of silos created by the wallet.
    function creatorSiloCounter(address _creator) external view returns (uint256);

    /// @notice Do not use this method to check if silo is secure. Anyone can deploy silo with any configuration
    /// and implementation. Most critical part of verification would be to check who deployed it.
    /// @dev True if the address was deployed using SiloFactory.
    function isSilo(address _silo) external view returns (bool);

    /// @notice Id of a next Silo to be deployed. This is an ID of non-existing Silo outside of createSilo
    /// function call. ID of a first Silo is 1.
    function getNextSiloId() external view returns (uint256);

    /// @notice Get the DAO and deployer fee receivers for a particular Silo address.
    /// @param _silo Silo address.
    /// @return dao DAO fee receiver.
    /// @return deployer Deployer fee receiver.
    function getFeeReceivers(address _silo) external view returns (address dao, address deployer);

    /// @notice Validate InitData for a new Silo. Config will be checked for the fee limits, missing parameters.
    /// @param _initData Silo init data.
    function validateSiloInitData(ISiloConfig.InitData memory _initData) external view returns (bool);
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.5.0;

import {ISiloConfig} from "./ISiloConfig.sol";

interface IHookReceiver {
    struct HookConfig {
        uint24 hooksBefore;
        uint24 hooksAfter;
    }

    event HookConfigured(address silo, uint24 hooksBefore, uint24 hooksAfter);

    /// @dev Revert if provided silo configuration during initialization is empty
    error EmptySiloConfig();
    /// @dev Revert if the hook receiver is already configured/initialized
    error AlreadyConfigured();

    /// @notice Initialize a hook receiver
    /// @param _siloConfig Silo configuration with all the details about the silo
    /// @param _data Data to initialize the hook receiver (if needed)
    function initialize(ISiloConfig _siloConfig, bytes calldata _data) external;

    /// @notice state of Silo before action, can be also without interest, if you need them, call silo.accrueInterest()
    function beforeAction(address _silo, uint256 _action, bytes calldata _input) external;

    function afterAction(address _silo, uint256 _action, bytes calldata _inputAndOutput) external;

    /// @notice return hooksBefore and hooksAfter configuration
    function hookReceiverConfig(address _silo) external view returns (uint24 hooksBefore, uint24 hooksAfter);
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.5.0;

interface ICrossReentrancyGuard {
    error CrossReentrantCall();
    error CrossReentrancyNotActive();

    /// @notice only silo method for cross Silo reentrancy
    function turnOnReentrancyProtection() external;

    /// @notice only silo method for cross Silo reentrancy
    function turnOffReentrancyProtection() external;

    /// @notice view method for checking cross Silo reentrancy flag
    /// @return entered true if the reentrancy guard is currently set to "entered", which indicates there is a
    /// `nonReentrant` function in the call stack.
    function reentrancyGuardEntered() external view returns (bool entered);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/Strings.sol)

pragma solidity ^0.8.20;

import {Math} from "./math/Math.sol";
import {SignedMath} from "./math/SignedMath.sol";

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant HEX_DIGITS = "0123456789abcdef";
    uint8 private constant ADDRESS_LENGTH = 20;

    /**
     * @dev The `value` string doesn't fit in the specified `length`.
     */
    error StringsInsufficientHexLength(uint256 value, uint256 length);

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        unchecked {
            uint256 length = Math.log10(value) + 1;
            string memory buffer = new string(length);
            uint256 ptr;
            /// @solidity memory-safe-assembly
            assembly {
                ptr := add(buffer, add(32, length))
            }
            while (true) {
                ptr--;
                /// @solidity memory-safe-assembly
                assembly {
                    mstore8(ptr, byte(mod(value, 10), HEX_DIGITS))
                }
                value /= 10;
                if (value == 0) break;
            }
            return buffer;
        }
    }

    /**
     * @dev Converts a `int256` to its ASCII `string` decimal representation.
     */
    function toStringSigned(int256 value) internal pure returns (string memory) {
        return string.concat(value < 0 ? "-" : "", toString(SignedMath.abs(value)));
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        unchecked {
            return toHexString(value, Math.log256(value) + 1);
        }
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        uint256 localValue = value;
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = HEX_DIGITS[localValue & 0xf];
            localValue >>= 4;
        }
        if (localValue != 0) {
            revert StringsInsufficientHexLength(value, length);
        }
        return string(buffer);
    }

    /**
     * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal
     * representation.
     */
    function toHexString(address addr) internal pure returns (string memory) {
        return toHexString(uint256(uint160(addr)), ADDRESS_LENGTH);
    }

    /**
     * @dev Returns true if the two strings are equal.
     */
    function equal(string memory a, string memory b) internal pure returns (bool) {
        return bytes(a).length == bytes(b).length && keccak256(bytes(a)) == keccak256(bytes(b));
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.20;

/**
 * @dev Interface of the ERC-20 standard as defined in the ERC.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the value of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the value of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves a `value` amount of tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 value) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets a `value` amount of tokens as the allowance of `spender` over the
     * caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the
     * allowance mechanism. `value` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 value) external returns (bool);
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.6.2 <0.9.0;

library Utils {
    // https://docs.soliditylang.org/en/latest/assembly.html#example
    function getCodeAt(address _addr) internal view returns (bytes memory oCode) {
        assembly {
            // retrieve the size of the code, this needs assembly
            let size := extcodesize(_addr)
            // allocate output byte array - this could also be done without assembly
            // by using o_code = new bytes(size)
            oCode := mload(0x40)
            // new "memory end" including padding
            mstore(0x40, add(oCode, and(add(add(size, 0x20), 0x1f), not(0x1f))))
            // store length in memory
            mstore(oCode, size)
            // actually retrieve the code, this needs assembly
            extcodecopy(_addr, add(oCode, 0x20), 0, size)
        }
    }

    // https://ethereum.stackexchange.com/questions/10932/how-to-convert-string-to-int
    function stringToUint(string memory s) internal pure returns (uint256) {
        bytes memory b = bytes(s);
        uint256 result = 0;
        for (uint256 i = 0; i < b.length; i++) {
            if (uint8(b[i]) >= 48 && uint8(b[i]) <= 57) {
                result = result * 10 + (uint256(uint8(b[i])) - 48);
            }
        }
        return result;
    }

    function encodeGetAddressCall(bytes4 _fnSig, uint256 _chainId, string memory _key)
        internal
        pure
        returns (bytes memory fnPayload)
    {
        assembly {
            function allocate(length) -> pos {
                pos := mload(0x40)
                mstore(0x40, add(pos, length))
            }

            let keyLength := mload(_key)

            fnPayload := mload(0x40)

            let p := allocate(0x20)

            let keySlots := mul(add(div(keyLength, 0x20), 0x01), 0x20)

            mstore(p, add(0x64, keySlots))

            p := allocate(0x04)
            mstore(p, _fnSig)

            p := allocate(0x20)
            mstore(p, _chainId)

            p := allocate(0x20)
            mstore(p, 0x40)

            p := allocate(0x20)
            mstore(p, keyLength)

            for { let i := 0 } lt(i, keyLength) { i := add(i, 0x20) } {
                p := allocate(0x20)
                mstore(p, mload(add(add(_key, 0x20), i)))
            }
        }
    }

    function encodeSingleSelectorCall(bytes4 _fnSig) internal pure returns (bytes memory fnPayload) {
        assembly {
            function allocate(length) -> pos {
                pos := mload(0x40)
                mstore(0x40, add(pos, length))
            }

            fnPayload := mload(0x40)

            let p := allocate(0x20)
            mstore(fnPayload, 0x04)

            p := allocate(0x04)
            mstore(p, _fnSig)
        }
    }

    // https://ethereum.stackexchange.com/questions/15350/how-to-convert-an-bytes-to-address-in-solidity
    function asciiBytesToAddress(bytes memory b) internal pure returns (address) {
        uint256 result = 0;
        for (uint256 i = 0; i < b.length; i++) {
            uint256 c = uint256(uint8(b[i]));
            if (c >= 48 && c <= 57) {
                result = result * 16 + (c - 48);
            }
            if (c >= 65 && c <= 90) {
                result = result * 16 + (c - 55);
            }
            if (c >= 97 && c <= 122) {
                result = result * 16 + (c - 87);
            }
        }
        return address(uint160(result));
    }
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.5.0;

import {ISiloConfig} from "./ISiloConfig.sol";
import {ISilo} from "./ISilo.sol";
import {IInterestRateModel} from "./IInterestRateModel.sol";
import {IPartialLiquidation} from "./IPartialLiquidation.sol";

interface ISiloLens {
    struct Borrower {
        ISilo silo;
        address wallet;
    }

    struct BorrowerHealth {
        uint256 lt;
        uint256 ltv;
    }

    struct APR {
        uint256 depositAPR;
        uint256 borrowAPR;
    }

    error InvalidAsset();

    /// @dev calculates solvency
    /// @notice this is backwards compatible method, you can use `_silo.isSolvent(_borrower)` directly.
    /// @param _silo Silo address from which to read data
    /// @param _borrower wallet address
    /// @return true if solvent, false otherwise
    function isSolvent(ISilo _silo, address _borrower) external view returns (bool);

    /// @dev Amount of token that is available for borrowing.
    /// @notice this is backwards compatible method, you can use `_silo.getLiquidity()`
    /// @param _silo Silo address from which to read data
    /// @return Silo liquidity
    function liquidity(ISilo _silo) external view returns (uint256);

    /// @return liquidity based on contract state (without interest, fees)
    function getRawLiquidity(ISilo _silo) external view returns (uint256 liquidity);

    /// @notice Retrieves the maximum loan-to-value (LTV) ratio
    /// @param _silo Address of the silo
    /// @return maxLtv The maximum LTV ratio configured for the silo in 18 decimals points
    function getMaxLtv(ISilo _silo) external view returns (uint256 maxLtv);

    /// @notice Retrieves the LT value
    /// @param _silo Address of the silo
    /// @return lt The LT value in 18 decimals points
    function getLt(ISilo _silo) external view returns (uint256 lt);

    /// @notice Retrieves the LT for a specific borrower
    /// @param _silo Address of the silo
    /// @param _borrower Address of the borrower
    /// @return userLT The LT for the borrower in 18 decimals points, returns 0 if no debt
    function getUserLT(ISilo _silo, address _borrower) external view returns (uint256 userLT);

    /// @notice Retrieves the LT for a specific borrowers
    /// @param _borrowers list of borrowers with corresponding silo addresses
    /// @return usersLTs The LTs for the borrowers in 18 decimals points, returns 0 for users with no debt
    function getUsersLT(Borrower[] calldata _borrowers) external view returns (uint256[] memory usersLTs);

    /// @notice Retrieves the LT and LTV for a specific borrowers
    /// @param _borrowers list of borrowers with corresponding silo addresses
    /// @return healths The LTs and LTVs for the borrowers in 18 decimals points, returns 0 for users with no debt
    function getUsersHealth(Borrower[] calldata _borrowers) external view returns (BorrowerHealth[] memory healths);

    /// @notice Retrieves the loan-to-value (LTV) for a specific borrower
    /// @param _silo Address of the silo
    /// @param _borrower Address of the borrower
    /// @return userLTV The LTV for the borrower in 18 decimals points
    function getUserLTV(ISilo _silo, address _borrower) external view returns (uint256 userLTV);

    /// @notice Retrieves the loan-to-value (LTV) for a specific borrower
    /// @param _silo Address of the silo
    /// @param _borrower Address of the borrower
    /// @return ltv The LTV for the borrower in 18 decimals points
    function getLtv(ISilo _silo, address _borrower) external view returns (uint256 ltv);

    /// @notice Check if user has position (collateral, protected or debt)
    /// in any asset in a market (both silos are checked)
    /// @param _siloConfig Market address (silo config address)
    /// @param _borrower wallet address for which to read data
    /// @return TRUE if user has position in any asset
    function hasPosition(ISiloConfig _siloConfig, address _borrower) external view returns (bool);

    /// @notice Check if user is in debt
    /// @param _siloConfig Market address (silo config address)
    /// @param _borrower wallet address for which to read data
    /// @return TRUE if user borrowed any amount of any asset, otherwise FALSE
    function inDebt(ISiloConfig _siloConfig, address _borrower) external view returns (bool);

    /// @notice Retrieves the fee details in 18 decimals points and the addresses of the DAO and deployer fee receivers
    /// @param _silo Address of the silo
    /// @return daoFeeReceiver The address of the DAO fee receiver
    /// @return deployerFeeReceiver The address of the deployer fee receiver
    /// @return daoFee The total fee for the DAO in 18 decimals points
    /// @return deployerFee The total fee for the deployer in 18 decimals points
    function getFeesAndFeeReceivers(ISilo _silo)
        external
        view
        returns (address daoFeeReceiver, address deployerFeeReceiver, uint256 daoFee, uint256 deployerFee);

    /// @notice Get underlying balance of all deposits of silo asset of given user including "protected"
    /// deposits, with interest
    /// @param _silo Address of the silo
    /// @param _borrower wallet address for which to read data
    /// @return balance of underlying tokens for the given `_borrower`
    function collateralBalanceOfUnderlying(ISilo _silo, address _borrower)
        external
        view
        returns (uint256);

    /// @notice Get amount of debt of underlying token for given user
    /// @param _silo Silo address from which to read data
    /// @param _borrower wallet address for which to read data
    /// @return balance of underlying token owed
    function debtBalanceOfUnderlying(ISilo _silo, address _borrower) external view returns (uint256);

    /// @param _silo silo where borrower has debt
    /// @param _hook hook for silo with debt
    /// @param _borrower borrower address
    /// @return collateralToLiquidate underestimated amount of collateral liquidator will get
    /// @return debtToRepay debt amount needed to be repay to get `collateralToLiquidate`
    /// @return sTokenRequired TRUE, when liquidation with underlying asset is not possible because of not enough
    /// liquidity
    /// @return fullLiquidation TRUE if position has to be fully liquidated
    function maxLiquidation(ISilo _silo, IPartialLiquidation _hook, address _borrower)
        external
        view
        returns (uint256 collateralToLiquidate, uint256 debtToRepay, bool sTokenRequired, bool fullLiquidation);

    /// @notice Get amount of underlying asset that has been deposited to Silo
    /// @dev It reads directly from storage so interest generated between last update and now is not
    /// taken for account
    /// @param _silo Silo address from which to read data
    /// @return totalDeposits amount of all deposits made for given asset
    function totalDeposits(ISilo _silo) external view returns (uint256 totalDeposits);

    /// @notice returns total deposits with interest dynamically calculated at current block timestamp
    /// @return total deposits amount with interest
    function totalDepositsWithInterest(ISilo _silo) external view returns (uint256);

    /// @notice returns total borrow amount with interest dynamically calculated at current block timestamp
    /// @return _totalBorrowAmount total deposits amount with interest
    function totalBorrowAmountWithInterest(ISilo _silo)
        external
        view
        returns (uint256 _totalBorrowAmount);

    /// @notice Get amount of protected asset token that has been deposited to Silo
    /// @param _silo Silo address from which to read data
    /// @return amount of all "protected" deposits
    function collateralOnlyDeposits(ISilo _silo) external view returns (uint256);

    /// @notice Calculates current deposit (with interest) for user
    /// without protected deposits
    /// @param _silo Silo address from which to read data
    /// @param _borrower account for which calculation are done
    /// @return borrowerDeposits amount of asset _borrower posses
    function getDepositAmount(ISilo _silo, address _borrower)
        external
        view
        returns (uint256 borrowerDeposits);

    /// @notice Get amount of asset that has been borrowed
    /// @dev It reads directly from storage so interest generated between last update and now is not
    /// taken for account
    /// @param _silo Silo address from which to read data
    /// @return amount of asset that has been borrowed
    function totalBorrowAmount(ISilo _silo) external view returns (uint256);

    /// @notice Get totalSupply of debt token
    /// @dev Debt token represents a share in total debt of given asset
    /// @param _silo Silo address from which to read data
    /// @return totalSupply of debt token
    function totalBorrowShare(ISilo _silo) external view returns (uint256);

    /// @notice Calculates current borrow amount for user with interest
    /// @param _silo Silo address from which to read data
    /// @param _borrower account for which calculation are done
    /// @return total amount of asset user needs to repay at provided timestamp
    function getBorrowAmount(ISilo _silo, address _borrower)
        external
        view
        returns (uint256);

    /// @notice Get debt token balance of a user
    /// @dev Debt token represents a share in total debt of given asset.
    /// This method calls balanceOf(_borrower) on that token.
    /// @param _silo Silo address from which to read data
    /// @param _borrower wallet address for which to read data
    /// @return balance of debt token of given user
    function borrowShare(ISilo _silo, address _borrower) external view returns (uint256);

    /// @notice Get amount of fees earned by protocol to date
    /// @dev It reads directly from storage so interest generated between last update and now is not
    /// taken for account. In SiloLens v1 this was total (ever growing) amount, in this one is since last withdraw.
    /// @param _silo Silo address from which to read data
    /// @return amount of fees earned by protocol to date since last withdraw
    function protocolFees(ISilo _silo) external view returns (uint256);

    /// @notice Calculate value of collateral asset for user
    /// @dev It dynamically adds interest earned. Takes for account protected deposits as well.
    /// In v1 result is always in 18 decimals, here it depends on oracle setup.
    /// @param _siloConfig Market address (silo config address)
    /// @param _borrower account for which calculation are done
    /// @return value of collateral denominated in quote token, decimal depends on oracle setup.
    function calculateCollateralValue(ISiloConfig _siloConfig, address _borrower) external view returns (uint256);

    /// @notice Calculate value of borrowed asset by user
    /// @dev It dynamically adds interest earned to borrowed amount
    /// In v1 result is always in 18 decimals, here it depends on oracle setup.
    /// @param _siloConfig Market address (silo config address)
    /// @param _borrower account for which calculation are done
    /// @return value of debt denominated in quote token, decimal depends on oracle setup.
    function calculateBorrowValue(ISiloConfig _siloConfig, address _borrower) external view returns (uint256);

    /// @notice Calculates fraction between borrowed amount and the current liquidity of tokens for given asset
    /// denominated in percentage
    /// @dev [v1 NOT compatible] Utilization is calculated current values in storage so it does not take for account
    /// earned interest and ever-increasing total borrow amount. It assumes `Model.DP()` = 100%.
    /// @param _silo Silo address from which to read data
    /// @return utilization value
    function getUtilization(ISilo _silo) external view returns (uint256);

    /// @notice Retrieves the interest rate model
    /// @param _silo Address of the silo
    /// @return irm InterestRateModel contract address
    function getInterestRateModel(ISilo _silo) external view returns (address irm);

    /// @notice Calculates current borrow interest rate
    /// @param _silo Address of the silo
    /// @return borrowAPR The interest rate value in 18 decimals points. 10**18 is equal to 100% per year
    function getBorrowAPR(ISilo _silo) external view returns (uint256 borrowAPR);

    /// @notice Calculates current deposit interest rate.
    /// @param _silo Address of the silo
    /// @return depositAPR The interest rate value in 18 decimals points. 10**18 is equal to 100% per year.
    function getDepositAPR(ISilo _silo) external view returns (uint256 depositAPR);

    /// @notice Calculates current deposit and borrow interest rates (bulk method).
    /// @param _silos Addresses of the silos
    /// @return aprs The interest rate values in 18 decimals points. 10**18 is equal to 100% per year.
    function getAPRs(ISilo[] calldata _silos) external view returns (APR[] memory aprs);

    /// @dev gets interest rates model object
    /// @param _silo Silo address from which to read data
    /// @return IInterestRateModel interest rates model object
    function getModel(ISilo _silo) external view returns (IInterestRateModel);

    /// @notice Get names of all programs in Silo incentives controller
    /// @param _siloIncentivesController Address of the Silo incentives controller
    /// @return programsNames Names of all programs in Silo incentives controller
    function getSiloIncentivesControllerProgramsNames(
        address _siloIncentivesController
    ) external view returns (string[] memory programsNames);
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.5.0;

import {IERC20Metadata} from "openzeppelin5/token/ERC20/extensions/IERC20Metadata.sol";

import {ISiloConfig} from "./ISiloConfig.sol";
import {ISilo} from "./ISilo.sol";

interface IShareToken is IERC20Metadata {
    struct HookSetup {
        /// @param this is the same as in siloConfig
        address hookReceiver;
        /// @param hooks bitmap
        uint24 hooksBefore;
        /// @param hooks bitmap
        uint24 hooksAfter;
        /// @param tokenType must be one of this hooks values: COLLATERAL_TOKEN, PROTECTED_TOKEN, DEBT_TOKEN
        uint24 tokenType;
    }

    struct ShareTokenStorage {
        /// @notice Silo address for which tokens was deployed
        ISilo silo;

        /// @dev cached silo config address
        ISiloConfig siloConfig;

        /// @notice Copy of hooks setup from SiloConfig for optimisation purposes
        HookSetup hookSetup;

        bool transferWithChecks;
    }

    /// @notice Emitted every time receiver is notified about token transfer
    /// @param notificationReceiver receiver address
    /// @param success false if TX reverted on `notificationReceiver` side, otherwise true
    event NotificationSent(address indexed notificationReceiver, bool success);

    error OnlySilo();
    error OnlySiloConfig();
    error OwnerIsZero();
    error RecipientIsZero();
    error AmountExceedsAllowance();
    error RecipientNotSolventAfterTransfer();
    error SenderNotSolventAfterTransfer();
    error ZeroTransfer();

    /// @notice method for SiloConfig to synchronize hooks
    /// @param _hooksBefore hooks bitmap to trigger hooks BEFORE action
    /// @param _hooksAfter hooks bitmap to trigger hooks AFTER action
    function synchronizeHooks(uint24 _hooksBefore, uint24 _hooksAfter) external;

    /// @notice Mint method for Silo to create debt
    /// @param _owner wallet for which to mint token
    /// @param _spender wallet that asks for mint
    /// @param _amount amount of token to be minted
    function mint(address _owner, address _spender, uint256 _amount) external;

    /// @notice Burn method for Silo to close debt
    /// @param _owner wallet for which to burn token
    /// @param _spender wallet that asks for burn
    /// @param _amount amount of token to be burned
    function burn(address _owner, address _spender, uint256 _amount) external;

    /// @notice TransferFrom method for liquidation
    /// @param _from wallet from which we transferring tokens
    /// @param _to wallet that will get tokens
    /// @param _amount amount of token to transfer
    function forwardTransferFromNoChecks(address _from, address _to, uint256 _amount) external;

    /// @dev Returns the amount of tokens owned by `account`.
    /// @param _account address for which to return data
    /// @return balance of the _account
    /// @return totalSupply total supply of the token
    function balanceOfAndTotalSupply(address _account) external view returns (uint256 balance, uint256 totalSupply);

    /// @notice Returns silo address for which token was deployed
    /// @return silo address
    function silo() external view returns (ISilo silo);

    function siloConfig() external view returns (ISiloConfig silo);

    /// @notice Returns hook setup
    function hookSetup() external view returns (HookSetup memory);

    /// @notice Returns hook receiver address
    function hookReceiver() external view returns (address);
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.5.0;

interface IPartialLiquidation {
    struct HookSetup {
        /// @param this is the same as in siloConfig
        address hookReceiver;
        /// @param hooks bitmap
        uint24 hooksBefore;
        /// @param hooks bitmap
        uint24 hooksAfter;
    }

    /// @dev Emitted when a borrower is liquidated.
    /// @param liquidator The address of the liquidator
    /// @param silo The address of the silo on which position was liquidated
    /// @param borrower The address of the borrower
    /// @param repayDebtAssets Repay amount
    /// @param withdrawCollateral Total (collateral + protected) withdraw amount, in case `receiveSToken` is TRUE
    /// then this is estimated withdraw, and representation of this amount in sToken was transferred
    /// @param receiveSToken True if the liquidators wants to receive the collateral sTokens, `false` if he wants
    /// to receive the underlying collateral asset directly
    event LiquidationCall(
        address indexed liquidator,
        address indexed silo,
        address indexed borrower,
        uint256 repayDebtAssets,
        uint256 withdrawCollateral,
        bool receiveSToken
    );

    error UnexpectedCollateralToken();
    error UnexpectedDebtToken();
    error NoDebtToCover();
    error FullLiquidationRequired();
    error UserIsSolvent();
    error UnknownRatio();
    error NoRepayAssets();

    /// @notice Function to liquidate insolvent position
    /// - The caller (liquidator) covers `debtToCover` amount of debt of the user getting liquidated, and receives
    ///   an equivalent amount in `collateralAsset` plus a liquidation fee to cover market risk
    /// @dev this method reverts when:
    /// - `_maxDebtToCover` is zero
    /// - `_collateralAsset` is not `_user` collateral token (note, that user can have both tokens in Silo, but only one
    ///   is for backing debt
    /// - `_debtAsset` is not a token that `_user` borrow
    /// - `_user` is solvent and there is no debt to cover
    /// - `_maxDebtToCover` is set to cover only part of the debt but full liquidation is required
    /// - when not enough liquidity to transfer from `_user` collateral to liquidator
    ///   (use `_receiveSToken == true` in that case)
    /// @param _collateralAsset The address of the underlying asset used as collateral, to receive as result
    /// @param _debtAsset The address of the underlying borrowed asset to be repaid with the liquidation
    /// @param _user The address of the borrower getting liquidated
    /// @param _maxDebtToCover The maximum debt amount of borrowed `asset` the liquidator wants to cover,
    /// in case this amount is too big, it will be reduced to maximum allowed liquidation amount
    /// @param _receiveSToken True if the liquidators wants to receive the collateral sTokens, `false` if he wants
    /// to receive the underlying collateral asset directly
    /// @return withdrawCollateral collateral that was send to `msg.sender`, in case of `_receiveSToken` is TRUE,
    /// `withdrawCollateral` will be estimated, on redeem one can expect this value to be rounded down
    /// @return repayDebtAssets actual debt value that was repaid by `msg.sender`
    function liquidationCall(
        address _collateralAsset,
        address _debtAsset,
        address _user,
        uint256 _maxDebtToCover,
        bool _receiveSToken
    )
        external
        returns (uint256 withdrawCollateral, uint256 repayDebtAssets);

    /// @dev debt is keep growing over time, so when dApp use this view to calculate max, tx should never revert
    /// because actual max can be only higher
    /// @return collateralToLiquidate underestimated amount of collateral liquidator will get
    /// @return debtToRepay debt amount needed to be repay to get `collateralToLiquidate`
    /// @return sTokenRequired TRUE, when liquidation with underlying asset is not possible because of not enough
    /// liquidity
    function maxLiquidation(address _borrower)
        external
        view
        returns (uint256 collateralToLiquidate, uint256 debtToRepay, bool sTokenRequired);
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.5.0;

interface IInterestRateModel {
    event InterestRateModelError();

    /// @dev Sets config address for all Silos that will use this model
    /// @param _irmConfig address of IRM config contract
    function initialize(address _irmConfig) external;

    /// @dev get compound interest rate and update model storage for current block.timestamp
    /// @param _collateralAssets total silo collateral assets
    /// @param _debtAssets total silo debt assets
    /// @param _interestRateTimestamp last IRM timestamp
    /// @return rcomp compounded interest rate from last update until now (1e18 == 100%)
    function getCompoundInterestRateAndUpdate(
        uint256 _collateralAssets,
        uint256 _debtAssets,
        uint256 _interestRateTimestamp
    )
        external
        returns (uint256 rcomp);

    /// @dev get compound interest rate
    /// @param _silo address of Silo for which interest rate should be calculated
    /// @param _blockTimestamp current block timestamp
    /// @return rcomp compounded interest rate from last update until now (1e18 == 100%)
    function getCompoundInterestRate(address _silo, uint256 _blockTimestamp)
        external
        view
        returns (uint256 rcomp);

    /// @dev get current annual interest rate
    /// @param _silo address of Silo for which interest rate should be calculated
    /// @param _blockTimestamp current block timestamp
    /// @return rcur current annual interest rate (1e18 == 100%)
    function getCurrentInterestRate(address _silo, uint256 _blockTimestamp)
        external
        view
        returns (uint256 rcur);

    /// @dev returns decimal points used by model
    function decimals() external view returns (uint256);
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.28;

import {ISilo} from "../interfaces/ISilo.sol";
import {IShareToken} from "../interfaces/IShareToken.sol";

import {ISiloConfig} from "../interfaces/ISiloConfig.sol";
import {IInterestRateModel} from "../interfaces/IInterestRateModel.sol";

import {SiloSolvencyLib} from "./SiloSolvencyLib.sol";
import {SiloMathLib} from "./SiloMathLib.sol";

library SiloLensLib {
    uint256 internal constant _PRECISION_DECIMALS = 1e18;

    function getRawLiquidity(ISilo _silo) internal view returns (uint256 liquidity) {
        return SiloMathLib.liquidity(
            _silo.getTotalAssetsStorage(ISilo.AssetType.Collateral),
            _silo.getTotalAssetsStorage(ISilo.AssetType.Debt)
        );
    }

    function getMaxLtv(ISilo _silo) internal view returns (uint256 maxLtv) {
        maxLtv = _silo.config().getConfig(address(_silo)).maxLtv;
    }

    function getLt(ISilo _silo) internal view returns (uint256 lt) {
        lt = _silo.config().getConfig(address(_silo)).lt;
    }

    function getInterestRateModel(ISilo _silo) internal view returns (address irm) {
        irm = _silo.config().getConfig(address(_silo)).interestRateModel;
    }

    function getBorrowAPR(ISilo _silo) internal view returns (uint256 borrowAPR) {
        IInterestRateModel model = IInterestRateModel(_silo.config().getConfig((address(_silo))).interestRateModel);
        borrowAPR = model.getCurrentInterestRate(address(_silo), block.timestamp);
    }

    function getDepositAPR(ISilo _silo) internal view returns (uint256 depositAPR) {
        uint256 collateralAssets = _silo.getCollateralAssets();

        if (collateralAssets == 0) {
            return 0;
        }

        ISiloConfig.ConfigData memory cfg = _silo.config().getConfig((address(_silo)));
        depositAPR = getBorrowAPR(_silo) * _silo.getDebtAssets() / collateralAssets;
        depositAPR = depositAPR * (_PRECISION_DECIMALS - cfg.daoFee - cfg.deployerFee) / _PRECISION_DECIMALS;
    }

    function getLtv(ISilo _silo, address _borrower) internal view returns (uint256 ltv) {
        (
            ISiloConfig.ConfigData memory collateralConfig,
            ISiloConfig.ConfigData memory debtConfig
        ) = _silo.config().getConfigsForSolvency(_borrower);

        if (debtConfig.silo != address(0)) {
            ltv = SiloSolvencyLib.getLtv(
                collateralConfig,
                debtConfig,
                _borrower,
                ISilo.OracleType.Solvency,
                ISilo.AccrueInterestInMemory.Yes,
                IShareToken(debtConfig.debtShareToken).balanceOf(_borrower)
            );
        }
    }

    function getUserLt(ISilo _silo, address _borrower) internal view returns (uint256 lt) {
        (
            ISiloConfig.ConfigData memory collateralConfig,
            ISiloConfig.ConfigData memory debtConfig
        ) = _silo.config().getConfigsForSolvency(_borrower);

        if (debtConfig.silo != address(0)) lt = collateralConfig.lt;
    }

    function getLtvAndLt(ISilo _silo, address _borrower) internal view returns (uint256 ltv, uint256 lt) {
        (
            ISiloConfig.ConfigData memory collateralConfig,
            ISiloConfig.ConfigData memory debtConfig
        ) = _silo.config().getConfigsForSolvency(_borrower);

        if (debtConfig.silo != address(0)) {
            ltv = SiloSolvencyLib.getLtv(
                collateralConfig,
                debtConfig,
                _borrower,
                ISilo.OracleType.Solvency,
                ISilo.AccrueInterestInMemory.Yes,
                IShareToken(debtConfig.debtShareToken).balanceOf(_borrower)
            );

            lt = collateralConfig.lt;
        }
    }

    function hasPosition(ISiloConfig _siloConfig, address _borrower) internal view returns (bool has) {
        (address silo0, address silo1) = _siloConfig.getSilos();
        ISiloConfig.ConfigData memory cfg0 = _siloConfig.getConfig(silo0);
        ISiloConfig.ConfigData memory cfg1 = _siloConfig.getConfig(silo1);

        if (IShareToken(cfg0.collateralShareToken).balanceOf(_borrower) != 0) return true;
        if (IShareToken(cfg0.protectedShareToken).balanceOf(_borrower) != 0) return true;
        if (IShareToken(cfg1.collateralShareToken).balanceOf(_borrower) != 0) return true;
        if (IShareToken(cfg1.protectedShareToken).balanceOf(_borrower) != 0) return true;

        if (IShareToken(cfg0.debtShareToken).balanceOf(_borrower) != 0) return true;
        if (IShareToken(cfg1.debtShareToken).balanceOf(_borrower) != 0) return true;

        return false;
      }

    function inDebt(ISiloConfig _siloConfig, address _borrower) internal view returns (bool has) {
        (, ISiloConfig.ConfigData memory debtConfig) = _siloConfig.getConfigsForSolvency(_borrower);

        has = debtConfig.debtShareToken != address(0)
            && IShareToken(debtConfig.debtShareToken).balanceOf(_borrower) != 0;
    }

    function collateralBalanceOfUnderlying(ISilo _silo, address _borrower)
        internal
        view
        returns (uint256 borrowerCollateral)
    {
        (
            address protectedShareToken, address collateralShareToken,
        ) = _silo.config().getShareTokens(address(_silo));

        uint256 protectedShareBalance = IShareToken(protectedShareToken).balanceOf(_borrower);
        uint256 collateralShareBalance = IShareToken(collateralShareToken).balanceOf(_borrower);

        if (protectedShareBalance != 0) {
            borrowerCollateral = _silo.previewRedeem(protectedShareBalance, ISilo.CollateralType.Protected);
        }

        if (collateralShareBalance != 0) {
            borrowerCollateral += _silo.previewRedeem(collateralShareBalance, ISilo.CollateralType.Collateral);
        }
    }

    function totalBorrowShare(ISilo _silo) internal view returns (uint256) {
        (,, address debtShareToken) = _silo.config().getShareTokens(address(_silo));
        return IShareToken(debtShareToken).totalSupply();
    }

    function borrowShare(ISilo _silo, address _borrower) external view returns (uint256) {
        (,, address debtShareToken) = _silo.config().getShareTokens(address(_silo));
        return IShareToken(debtShareToken).balanceOf(_borrower);
    }

    function calculateValues(ISiloConfig _siloConfig, address _borrower)
        internal
        view
        returns (uint256 sumOfBorrowerCollateralValue, uint256 totalBorrowerDebtValue)
    {
        (
            ISiloConfig.ConfigData memory collateralConfig,
            ISiloConfig.ConfigData memory debtConfig
        ) = _siloConfig.getConfigsForSolvency(_borrower);

        // if no debt collateralConfig and debtConfig are empty
        if (collateralConfig.token == address(0)) return (0, 0);

        SiloSolvencyLib.LtvData memory ltvData = SiloSolvencyLib.getAssetsDataForLtvCalculations(
            collateralConfig,
            debtConfig,
            _borrower,
            ISilo.OracleType.Solvency,
            ISilo.AccrueInterestInMemory.Yes,
            IShareToken(debtConfig.debtShareToken).balanceOf(_borrower)
        );

        (
            sumOfBorrowerCollateralValue, totalBorrowerDebtValue,
        ) = SiloSolvencyLib.calculateLtv(ltvData, collateralConfig.token, debtConfig.token);
    }
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.28;

import {SafeERC20} from "openzeppelin5/token/ERC20/utils/SafeERC20.sol";
import {IERC20} from "openzeppelin5/token/ERC20/IERC20.sol";

import {ISiloConfig} from "../interfaces/ISiloConfig.sol";
import {ISilo} from "../interfaces/ISilo.sol";
import {IInterestRateModel} from "../interfaces/IInterestRateModel.sol";
import {IShareToken} from "../interfaces/IShareToken.sol";
import {SiloMathLib} from "./SiloMathLib.sol";

library SiloStdLib {
    using SafeERC20 for IERC20;

    uint256 internal constant _PRECISION_DECIMALS = 1e18;

    /// @notice Returns flash fee amount
    /// @param _config address of config contract for Silo
    /// @param _token for which fee is calculated
    /// @param _amount for which fee is calculated
    /// @return fee flash fee amount
    function flashFee(ISiloConfig _config, address _token, uint256 _amount) internal view returns (uint256 fee) {
        if (_amount == 0) return 0;

        // all user set fees are in 18 decimals points
        (,, uint256 flashloanFee, address asset) = _config.getFeesWithAsset(address(this));
        require(_token == asset, ISilo.UnsupportedFlashloanToken());
        if (flashloanFee == 0) return 0;

        require(type(uint256).max / _amount >= flashloanFee, ISilo.FlashloanAmountTooBig());
        fee = _amount * flashloanFee / _PRECISION_DECIMALS;

        // round up
        if (fee == 0) return 1;
    }

    /// @notice Returns totalAssets and totalShares for conversion math (convertToAssets and convertToShares)
    /// @dev This is useful for view functions that do not accrue interest before doing calculations. To work on
    ///      updated numbers, interest should be added on the fly.
    /// @param _configData for a single token for which to do calculations
    /// @param _assetType used to read proper storage data
    /// @return totalAssets total assets in Silo with interest for given asset type
    /// @return totalShares total shares in Silo for given asset type
    function getTotalAssetsAndTotalSharesWithInterest(
        ISiloConfig.ConfigData memory _configData,
        ISilo.AssetType _assetType
    )
        internal
        view
        returns (uint256 totalAssets, uint256 totalShares)
    {
        if (_assetType == ISilo.AssetType.Protected) {
            totalAssets = ISilo(_configData.silo).getTotalAssetsStorage(ISilo.AssetType.Protected);
            totalShares = IShareToken(_configData.protectedShareToken).totalSupply();
        } else if (_assetType == ISilo.AssetType.Collateral) {
            totalAssets = getTotalCollateralAssetsWithInterest(
                _configData.silo,
                _configData.interestRateModel,
                _configData.daoFee,
                _configData.deployerFee
            );

            totalShares = IShareToken(_configData.collateralShareToken).totalSupply();
        } else { // ISilo.AssetType.Debt
            totalAssets = getTotalDebtAssetsWithInterest(_configData.silo, _configData.interestRateModel);
            totalShares = IShareToken(_configData.debtShareToken).totalSupply();
        }
    }

    /// @notice Retrieves fee amounts in 18 decimals points and their respective receivers along with the asset
    /// @param _silo Silo address
    /// @return daoFeeReceiver Address of the DAO fee receiver
    /// @return deployerFeeReceiver Address of the deployer fee receiver
    /// @return daoFee DAO fee amount in 18 decimals points
    /// @return deployerFee Deployer fee amount in 18 decimals points
    /// @return asset Address of the associated asset
    function getFeesAndFeeReceiversWithAsset(ISilo _silo)
        internal
        view
        returns (
            address daoFeeReceiver,
            address deployerFeeReceiver,
            uint256 daoFee,
            uint256 deployerFee,
            address asset
        )
    {
        (daoFee, deployerFee,, asset) = _silo.config().getFeesWithAsset(address(_silo));
        (daoFeeReceiver, deployerFeeReceiver) = _silo.factory().getFeeReceivers(address(_silo));
    }

    /// @notice Calculates the total collateral assets with accrued interest
    /// @dev Do not use this method when accrueInterest were executed already, in that case total does not change
    /// @param _silo Address of the silo contract
    /// @param _interestRateModel Interest rate model to fetch compound interest rates
    /// @param _daoFee DAO fee in 18 decimals points
    /// @param _deployerFee Deployer fee in 18 decimals points
    /// @return totalCollateralAssetsWithInterest Accumulated collateral amount with interest
    function getTotalCollateralAssetsWithInterest(
        address _silo,
        address _interestRateModel,
        uint256 _daoFee,
        uint256 _deployerFee
    ) internal view returns (uint256 totalCollateralAssetsWithInterest) {
        uint256 rcomp;

        try IInterestRateModel(_interestRateModel).getCompoundInterestRate(_silo, block.timestamp) returns (uint256 r) {
            rcomp = r;
        } catch {
            // do not lock silo
        }

        (uint256 collateralAssets, uint256 debtAssets) = ISilo(_silo).getCollateralAndDebtTotalsStorage();

        (totalCollateralAssetsWithInterest,,,) = SiloMathLib.getCollateralAmountsWithInterest({
            _collateralAssets: collateralAssets,
            _debtAssets: debtAssets,
            _rcomp: rcomp,
            _daoFee: _daoFee,
            _deployerFee: _deployerFee
        });
    }

    /// @param _balanceCached if balance of `_owner` is unknown beforehand, then pass `0`
    function getSharesAndTotalSupply(address _shareToken, address _owner, uint256 _balanceCached)
        internal
        view
        returns (uint256 shares, uint256 totalSupply)
    {
        if (_balanceCached == 0) {
            (shares, totalSupply) = IShareToken(_shareToken).balanceOfAndTotalSupply(_owner);
        } else {
            shares = _balanceCached;
            totalSupply = IShareToken(_shareToken).totalSupply();
        }
    }

    /// @notice Calculates the total debt assets with accrued interest
    /// @param _silo Address of the silo contract
    /// @param _interestRateModel Interest rate model to fetch compound interest rates
    /// @return totalDebtAssetsWithInterest Accumulated debt amount with interest
    function getTotalDebtAssetsWithInterest(address _silo, address _interestRateModel)
        internal
        view
        returns (uint256 totalDebtAssetsWithInterest)
    {
        uint256 rcomp;

        try IInterestRateModel(_interestRateModel).getCompoundInterestRate(_silo, block.timestamp) returns (uint256 r) {
            rcomp = r;
        } catch {
            // do not lock silo
        }

        (
            totalDebtAssetsWithInterest,
        ) = SiloMathLib.getDebtAmountsWithInterest(ISilo(_silo).getTotalAssetsStorage(ISilo.AssetType.Debt), rcomp);
    }
}

// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.8.28;

import {DistributionTypes} from "../lib/DistributionTypes.sol";

interface IDistributionManager {
    struct IncentivesProgram {
        uint256 index;
        address rewardToken; // can't be updated after creation
        uint104 emissionPerSecond; // configured by owner
        uint40 lastUpdateTimestamp;
        uint40 distributionEnd; // configured by owner
        mapping(address user => uint256 userIndex) users;
    }

    struct IncentiveProgramDetails {
        uint256 index;
        address rewardToken;
        uint104 emissionPerSecond;
        uint40 lastUpdateTimestamp;
        uint40 distributionEnd;
    }

    struct AccruedRewards {
        uint256 amount;
        bytes32 programId;
        address rewardToken;
    }

    event AssetConfigUpdated(address indexed asset, uint256 emission);
    event AssetIndexUpdated(address indexed asset, uint256 index);
    event DistributionEndUpdated(string incentivesProgram, uint256 newDistributionEnd);
    event IncentivesProgramIndexUpdated(string incentivesProgram, uint256 newIndex);
    event UserIndexUpdated(address indexed user, string incentivesProgram, uint256 newIndex);

    error OnlyNotifier();
    error TooLongProgramName();
    error InvalidIncentivesProgramName();
    error OnlyNotifierOrOwner();
    error ZeroAddress();

    /**
     * @dev Sets the end date for the distribution
     * @param _incentivesProgram The incentives program name
     * @param _distributionEnd The end date timestamp
     */
    function setDistributionEnd(string calldata _incentivesProgram, uint40 _distributionEnd) external;

    /**
     * @dev Gets the end date for the distribution  
     * @param _incentivesProgram The incentives program name
     * @return The end of the distribution
     */
    function getDistributionEnd(string calldata _incentivesProgram) external view returns (uint256);

    /**
     * @dev Returns the data of an user on a distribution
     * @param _user Address of the user
     * @param _incentivesProgram The incentives program name
     * @return The new index
     */
    function getUserData(address _user, string calldata _incentivesProgram) external view returns (uint256);

    /**
     * @dev Returns the configuration of the distribution for a certain incentives program
     * @param _incentivesProgram The incentives program name
     * @return details The configuration of the incentives program
     */
    function incentivesProgram(string calldata _incentivesProgram)
        external
        view
        returns (IncentiveProgramDetails memory details);

    /**
     * @dev Returns the program id for the given program name.
     * This method TRUNCATES the program name to 32 bytes.
     * If provided strings only differ after the 32nd byte they would result in the same ProgramId.
     * Ensure to use inputs that will result in 32 bytes or less.
     * @param _programName The incentives program name
     * @return programId
     */
    function getProgramId(string calldata _programName) external pure returns (bytes32 programId);

    /**
     * @dev returns the names of all the incentives programs
     * @return programsNames the names of all the incentives programs
     */
    function getAllProgramsNames() external view returns (string[] memory programsNames);

    /**
     * @dev returns the name of an incentives program
     * @param _programName the name (bytes32) of the incentives program
     * @return programName the name (string) of the incentives program
     */
    function getProgramName(bytes32 _programName) external view returns (string memory programName);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC20.sol)

pragma solidity ^0.8.20;

import {IERC20} from "../token/ERC20/IERC20.sol";

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC165.sol)

pragma solidity ^0.8.20;

import {IERC165} from "../utils/introspection/IERC165.sol";

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)

pragma solidity ^0.8.20;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (interfaces/draft-IERC6093.sol)
pragma solidity ^0.8.20;

/**
 * @dev Standard ERC-20 Errors
 * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC-20 tokens.
 */
interface IERC20Errors {
    /**
     * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     * @param balance Current balance for the interacting account.
     * @param needed Minimum amount required to perform a transfer.
     */
    error ERC20InsufficientBalance(address sender, uint256 balance, uint256 needed);

    /**
     * @dev Indicates a failure with the token `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     */
    error ERC20InvalidSender(address sender);

    /**
     * @dev Indicates a failure with the token `receiver`. Used in transfers.
     * @param receiver Address to which tokens are being transferred.
     */
    error ERC20InvalidReceiver(address receiver);

    /**
     * @dev Indicates a failure with the `spender`’s `allowance`. Used in transfers.
     * @param spender Address that may be allowed to operate on tokens without being their owner.
     * @param allowance Amount of tokens a `spender` is allowed to operate with.
     * @param needed Minimum amount required to perform a transfer.
     */
    error ERC20InsufficientAllowance(address spender, uint256 allowance, uint256 needed);

    /**
     * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
     * @param approver Address initiating an approval operation.
     */
    error ERC20InvalidApprover(address approver);

    /**
     * @dev Indicates a failure with the `spender` to be approved. Used in approvals.
     * @param spender Address that may be allowed to operate on tokens without being their owner.
     */
    error ERC20InvalidSpender(address spender);
}

/**
 * @dev Standard ERC-721 Errors
 * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC-721 tokens.
 */
interface IERC721Errors {
    /**
     * @dev Indicates that an address can't be an owner. For example, `address(0)` is a forbidden owner in ERC-20.
     * Used in balance queries.
     * @param owner Address of the current owner of a token.
     */
    error ERC721InvalidOwner(address owner);

    /**
     * @dev Indicates a `tokenId` whose `owner` is the zero address.
     * @param tokenId Identifier number of a token.
     */
    error ERC721NonexistentToken(uint256 tokenId);

    /**
     * @dev Indicates an error related to the ownership over a particular token. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     * @param tokenId Identifier number of a token.
     * @param owner Address of the current owner of a token.
     */
    error ERC721IncorrectOwner(address sender, uint256 tokenId, address owner);

    /**
     * @dev Indicates a failure with the token `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     */
    error ERC721InvalidSender(address sender);

    /**
     * @dev Indicates a failure with the token `receiver`. Used in transfers.
     * @param receiver Address to which tokens are being transferred.
     */
    error ERC721InvalidReceiver(address receiver);

    /**
     * @dev Indicates a failure with the `operator`’s approval. Used in transfers.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     * @param tokenId Identifier number of a token.
     */
    error ERC721InsufficientApproval(address operator, uint256 tokenId);

    /**
     * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
     * @param approver Address initiating an approval operation.
     */
    error ERC721InvalidApprover(address approver);

    /**
     * @dev Indicates a failure with the `operator` to be approved. Used in approvals.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     */
    error ERC721InvalidOperator(address operator);
}

/**
 * @dev Standard ERC-1155 Errors
 * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC-1155 tokens.
 */
interface IERC1155Errors {
    /**
     * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     * @param balance Current balance for the interacting account.
     * @param needed Minimum amount required to perform a transfer.
     * @param tokenId Identifier number of a token.
     */
    error ERC1155InsufficientBalance(address sender, uint256 balance, uint256 needed, uint256 tokenId);

    /**
     * @dev Indicates a failure with the token `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     */
    error ERC1155InvalidSender(address sender);

    /**
     * @dev Indicates a failure with the token `receiver`. Used in transfers.
     * @param receiver Address to which tokens are being transferred.
     */
    error ERC1155InvalidReceiver(address receiver);

    /**
     * @dev Indicates a failure with the `operator`’s approval. Used in transfers.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     * @param owner Address of the current owner of a token.
     */
    error ERC1155MissingApprovalForAll(address operator, address owner);

    /**
     * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
     * @param approver Address initiating an approval operation.
     */
    error ERC1155InvalidApprover(address approver);

    /**
     * @dev Indicates a failure with the `operator` to be approved. Used in approvals.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     */
    error ERC1155InvalidOperator(address operator);

    /**
     * @dev Indicates an array length mismatch between ids and values in a safeBatchTransferFrom operation.
     * Used in batch transfers.
     * @param idsLength Length of the array of token identifiers
     * @param valuesLength Length of the array of token amounts
     */
    error ERC1155InvalidArrayLength(uint256 idsLength, uint256 valuesLength);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.3.0) (interfaces/IERC4626.sol)

pragma solidity ^0.8.20;

import {IERC20} from "../token/ERC20/IERC20.sol";
import {IERC20Metadata} from "../token/ERC20/extensions/IERC20Metadata.sol";

/**
 * @dev Interface of the ERC-4626 "Tokenized Vault Standard", as defined in
 * https://eips.ethereum.org/EIPS/eip-4626[ERC-4626].
 */
interface IERC4626 is IERC20, IERC20Metadata {
    event Deposit(address indexed sender, address indexed owner, uint256 assets, uint256 shares);

    event Withdraw(
        address indexed sender,
        address indexed receiver,
        address indexed owner,
        uint256 assets,
        uint256 shares
    );

    /**
     * @dev Returns the address of the underlying token used for the Vault for accounting, depositing, and withdrawing.
     *
     * - MUST be an ERC-20 token contract.
     * - MUST NOT revert.
     */
    function asset() external view returns (address assetTokenAddress);

    /**
     * @dev Returns the total amount of the underlying asset that is “managed” by Vault.
     *
     * - SHOULD include any compounding that occurs from yield.
     * - MUST be inclusive of any fees that are charged against assets in the Vault.
     * - MUST NOT revert.
     */
    function totalAssets() external view returns (uint256 totalManagedAssets);

    /**
     * @dev Returns the amount of shares that the Vault would exchange for the amount of assets provided, in an ideal
     * scenario where all the conditions are met.
     *
     * - MUST NOT be inclusive of any fees that are charged against assets in the Vault.
     * - MUST NOT show any variations depending on the caller.
     * - MUST NOT reflect slippage or other on-chain conditions, when performing the actual exchange.
     * - MUST NOT revert.
     *
     * NOTE: This calculation MAY NOT reflect the “per-user” price-per-share, and instead should reflect the
     * “average-user’s” price-per-share, meaning what the average user should expect to see when exchanging to and
     * from.
     */
    function convertToShares(uint256 assets) external view returns (uint256 shares);

    /**
     * @dev Returns the amount of assets that the Vault would exchange for the amount of shares provided, in an ideal
     * scenario where all the conditions are met.
     *
     * - MUST NOT be inclusive of any fees that are charged against assets in the Vault.
     * - MUST NOT show any variations depending on the caller.
     * - MUST NOT reflect slippage or other on-chain conditions, when performing the actual exchange.
     * - MUST NOT revert.
     *
     * NOTE: This calculation MAY NOT reflect the “per-user” price-per-share, and instead should reflect the
     * “average-user’s” price-per-share, meaning what the average user should expect to see when exchanging to and
     * from.
     */
    function convertToAssets(uint256 shares) external view returns (uint256 assets);

    /**
     * @dev Returns the maximum amount of the underlying asset that can be deposited into the Vault for the receiver,
     * through a deposit call.
     *
     * - MUST return a limited value if receiver is subject to some deposit limit.
     * - MUST return 2 ** 256 - 1 if there is no limit on the maximum amount of assets that may be deposited.
     * - MUST NOT revert.
     */
    function maxDeposit(address receiver) external view returns (uint256 maxAssets);

    /**
     * @dev Allows an on-chain or off-chain user to simulate the effects of their deposit at the current block, given
     * current on-chain conditions.
     *
     * - MUST return as close to and no more than the exact amount of Vault shares that would be minted in a deposit
     *   call in the same transaction. I.e. deposit should return the same or more shares as previewDeposit if called
     *   in the same transaction.
     * - MUST NOT account for deposit limits like those returned from maxDeposit and should always act as though the
     *   deposit would be accepted, regardless if the user has enough tokens approved, etc.
     * - MUST be inclusive of deposit fees. Integrators should be aware of the existence of deposit fees.
     * - MUST NOT revert.
     *
     * NOTE: any unfavorable discrepancy between convertToShares and previewDeposit SHOULD be considered slippage in
     * share price or some other type of condition, meaning the depositor will lose assets by depositing.
     */
    function previewDeposit(uint256 assets) external view returns (uint256 shares);

    /**
     * @dev Mints shares Vault shares to receiver by depositing exactly amount of underlying tokens.
     *
     * - MUST emit the Deposit event.
     * - MAY support an additional flow in which the underlying tokens are owned by the Vault contract before the
     *   deposit execution, and are accounted for during deposit.
     * - MUST revert if all of assets cannot be deposited (due to deposit limit being reached, slippage, the user not
     *   approving enough underlying tokens to the Vault contract, etc).
     *
     * NOTE: most implementations will require pre-approval of the Vault with the Vault’s underlying asset token.
     */
    function deposit(uint256 assets, address receiver) external returns (uint256 shares);

    /**
     * @dev Returns the maximum amount of the Vault shares that can be minted for the receiver, through a mint call.
     * - MUST return a limited value if receiver is subject to some mint limit.
     * - MUST return 2 ** 256 - 1 if there is no limit on the maximum amount of shares that may be minted.
     * - MUST NOT revert.
     */
    function maxMint(address receiver) external view returns (uint256 maxShares);

    /**
     * @dev Allows an on-chain or off-chain user to simulate the effects of their mint at the current block, given
     * current on-chain conditions.
     *
     * - MUST return as close to and no fewer than the exact amount of assets that would be deposited in a mint call
     *   in the same transaction. I.e. mint should return the same or fewer assets as previewMint if called in the
     *   same transaction.
     * - MUST NOT account for mint limits like those returned from maxMint and should always act as though the mint
     *   would be accepted, regardless if the user has enough tokens approved, etc.
     * - MUST be inclusive of deposit fees. Integrators should be aware of the existence of deposit fees.
     * - MUST NOT revert.
     *
     * NOTE: any unfavorable discrepancy between convertToAssets and previewMint SHOULD be considered slippage in
     * share price or some other type of condition, meaning the depositor will lose assets by minting.
     */
    function previewMint(uint256 shares) external view returns (uint256 assets);

    /**
     * @dev Mints exactly shares Vault shares to receiver by depositing amount of underlying tokens.
     *
     * - MUST emit the Deposit event.
     * - MAY support an additional flow in which the underlying tokens are owned by the Vault contract before the mint
     *   execution, and are accounted for during mint.
     * - MUST revert if all of shares cannot be minted (due to deposit limit being reached, slippage, the user not
     *   approving enough underlying tokens to the Vault contract, etc).
     *
     * NOTE: most implementations will require pre-approval of the Vault with the Vault’s underlying asset token.
     */
    function mint(uint256 shares, address receiver) external returns (uint256 assets);

    /**
     * @dev Returns the maximum amount of the underlying asset that can be withdrawn from the owner balance in the
     * Vault, through a withdraw call.
     *
     * - MUST return a limited value if owner is subject to some withdrawal limit or timelock.
     * - MUST NOT revert.
     */
    function maxWithdraw(address owner) external view returns (uint256 maxAssets);

    /**
     * @dev Allows an on-chain or off-chain user to simulate the effects of their withdrawal at the current block,
     * given current on-chain conditions.
     *
     * - MUST return as close to and no fewer than the exact amount of Vault shares that would be burned in a withdraw
     *   call in the same transaction. I.e. withdraw should return the same or fewer shares as previewWithdraw if
     *   called
     *   in the same transaction.
     * - MUST NOT account for withdrawal limits like those returned from maxWithdraw and should always act as though
     *   the withdrawal would be accepted, regardless if the user has enough shares, etc.
     * - MUST be inclusive of withdrawal fees. Integrators should be aware of the existence of withdrawal fees.
     * - MUST NOT revert.
     *
     * NOTE: any unfavorable discrepancy between convertToShares and previewWithdraw SHOULD be considered slippage in
     * share price or some other type of condition, meaning the depositor will lose assets by depositing.
     */
    function previewWithdraw(uint256 assets) external view returns (uint256 shares);

    /**
     * @dev Burns shares from owner and sends exactly assets of underlying tokens to receiver.
     *
     * - MUST emit the Withdraw event.
     * - MAY support an additional flow in which the underlying tokens are owned by the Vault contract before the
     *   withdraw execution, and are accounted for during withdraw.
     * - MUST revert if all of assets cannot be withdrawn (due to withdrawal limit being reached, slippage, the owner
     *   not having enough shares, etc).
     *
     * Note that some implementations will require pre-requesting to the Vault before a withdrawal may be performed.
     * Those methods should be performed separately.
     */
    function withdraw(uint256 assets, address receiver, address owner) external returns (uint256 shares);

    /**
     * @dev Returns the maximum amount of Vault shares that can be redeemed from the owner balance in the Vault,
     * through a redeem call.
     *
     * - MUST return a limited value if owner is subject to some withdrawal limit or timelock.
     * - MUST return balanceOf(owner) if owner is not subject to any withdrawal limit or timelock.
     * - MUST NOT revert.
     */
    function maxRedeem(address owner) external view returns (uint256 maxShares);

    /**
     * @dev Allows an on-chain or off-chain user to simulate the effects of their redemption at the current block,
     * given current on-chain conditions.
     *
     * - MUST return as close to and no more than the exact amount of assets that would be withdrawn in a redeem call
     *   in the same transaction. I.e. redeem should return the same or more assets as previewRedeem if called in the
     *   same transaction.
     * - MUST NOT account for redemption limits like those returned from maxRedeem and should always act as though the
     *   redemption would be accepted, regardless if the user has enough shares, etc.
     * - MUST be inclusive of withdrawal fees. Integrators should be aware of the existence of withdrawal fees.
     * - MUST NOT revert.
     *
     * NOTE: any unfavorable discrepancy between convertToAssets and previewRedeem SHOULD be considered slippage in
     * share price or some other type of condition, meaning the depositor will lose assets by redeeming.
     */
    function previewRedeem(uint256 shares) external view returns (uint256 assets);

    /**
     * @dev Burns exactly shares from owner and sends assets of underlying tokens to receiver.
     *
     * - MUST emit the Withdraw event.
     * - MAY support an additional flow in which the underlying tokens are owned by the Vault contract before the
     *   redeem execution, and are accounted for during redeem.
     * - MUST revert if all of shares cannot be redeemed (due to withdrawal limit being reached, slippage, the owner
     *   not having enough shares, etc).
     *
     * NOTE: some implementations will require pre-requesting to the Vault before a withdrawal may be performed.
     * Those methods should be performed separately.
     */
    function redeem(uint256 shares, address receiver, address owner) external returns (uint256 assets);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (token/ERC20/extensions/IERC20Permit.sol)

pragma solidity ^0.8.20;

/**
 * @dev Interface of the ERC-20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[ERC-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC-20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 *
 * ==== Security Considerations
 *
 * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature
 * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be
 * considered as an intention to spend the allowance in any specific way. The second is that because permits have
 * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should
 * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be
 * generally recommended is:
 *
 * ```solidity
 * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public {
 *     try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {}
 *     doThing(..., value);
 * }
 *
 * function doThing(..., uint256 value) public {
 *     token.safeTransferFrom(msg.sender, address(this), value);
 *     ...
 * }
 * ```
 *
 * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of
 * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also
 * {SafeERC20-safeTransferFrom}).
 *
 * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so
 * contracts should have entry points that don't rely on permit.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     *
     * CAUTION: See Security Considerations above.
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    /**
     * @dev Returns the current nonce for `owner`. This value must be
     * included whenever a signature is generated for {permit}.
     *
     * Every successful call to {permit} increases ``owner``'s nonce by one. This
     * prevents a signature from being used multiple times.
     */
    function nonces(address owner) external view returns (uint256);

    /**
     * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
     */
    // solhint-disable-next-line func-name-mixedcase
    function DOMAIN_SEPARATOR() external view returns (bytes32);
}

// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.0;

interface IRewardManager {
    function userReward(address token, address user) external view returns (uint128 index, uint128 accrued);
}

// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.0;

interface IPInterestManagerYT {
    event CollectInterestFee(uint256 amountInterestFee);

    function userInterest(address user) external view returns (uint128 lastPYIndex, uint128 accruedInterest);
}

// SPDX-License-Identifier: GPL-3.0-or-later
// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
// documentation files (the “Software”), to deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to the following conditions:

// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the
// Software.

// THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
// WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

pragma solidity ^0.8.0;

/* solhint-disable */

/**
 * @dev Exponentiation and logarithm functions for 18 decimal fixed point numbers (both base and exponent/argument).
 *
 * Exponentiation and logarithm with arbitrary bases (x^y and log_x(y)) are implemented by conversion to natural
 * exponentiation and logarithm (where the base is Euler's number).
 *
 * @author Fernando Martinelli - @fernandomartinelli
 * @author Sergio Yuhjtman - @sergioyuhjtman
 * @author Daniel Fernandez - @dmf7z
 */
library LogExpMath {
    // All fixed point multiplications and divisions are inlined. This means we need to divide by ONE when multiplying
    // two numbers, and multiply by ONE when dividing them.

    // All arguments and return values are 18 decimal fixed point numbers.
    int256 constant ONE_18 = 1e18;

    // Internally, intermediate values are computed with higher precision as 20 decimal fixed point numbers, and in the
    // case of ln36, 36 decimals.
    int256 constant ONE_20 = 1e20;
    int256 constant ONE_36 = 1e36;

    // The domain of natural exponentiation is bound by the word size and number of decimals used.
    //
    // Because internally the result will be stored using 20 decimals, the largest possible result is
    // (2^255 - 1) / 10^20, which makes the largest exponent ln((2^255 - 1) / 10^20) = 130.700829182905140221.
    // The smallest possible result is 10^(-18), which makes largest negative argument
    // ln(10^(-18)) = -41.446531673892822312.
    // We use 130.0 and -41.0 to have some safety margin.
    int256 constant MAX_NATURAL_EXPONENT = 130e18;
    int256 constant MIN_NATURAL_EXPONENT = -41e18;

    // Bounds for ln_36's argument. Both ln(0.9) and ln(1.1) can be represented with 36 decimal places in a fixed point
    // 256 bit integer.
    int256 constant LN_36_LOWER_BOUND = ONE_18 - 1e17;
    int256 constant LN_36_UPPER_BOUND = ONE_18 + 1e17;

    uint256 constant MILD_EXPONENT_BOUND = 2 ** 254 / uint256(ONE_20);

    // 18 decimal constants
    int256 constant x0 = 128000000000000000000; // 2ˆ7
    int256 constant a0 = 38877084059945950922200000000000000000000000000000000000; // eˆ(x0) (no decimals)
    int256 constant x1 = 64000000000000000000; // 2ˆ6
    int256 constant a1 = 6235149080811616882910000000; // eˆ(x1) (no decimals)

    // 20 decimal constants
    int256 constant x2 = 3200000000000000000000; // 2ˆ5
    int256 constant a2 = 7896296018268069516100000000000000; // eˆ(x2)
    int256 constant x3 = 1600000000000000000000; // 2ˆ4
    int256 constant a3 = 888611052050787263676000000; // eˆ(x3)
    int256 constant x4 = 800000000000000000000; // 2ˆ3
    int256 constant a4 = 298095798704172827474000; // eˆ(x4)
    int256 constant x5 = 400000000000000000000; // 2ˆ2
    int256 constant a5 = 5459815003314423907810; // eˆ(x5)
    int256 constant x6 = 200000000000000000000; // 2ˆ1
    int256 constant a6 = 738905609893065022723; // eˆ(x6)
    int256 constant x7 = 100000000000000000000; // 2ˆ0
    int256 constant a7 = 271828182845904523536; // eˆ(x7)
    int256 constant x8 = 50000000000000000000; // 2ˆ-1
    int256 constant a8 = 164872127070012814685; // eˆ(x8)
    int256 constant x9 = 25000000000000000000; // 2ˆ-2
    int256 constant a9 = 128402541668774148407; // eˆ(x9)
    int256 constant x10 = 12500000000000000000; // 2ˆ-3
    int256 constant a10 = 113314845306682631683; // eˆ(x10)
    int256 constant x11 = 6250000000000000000; // 2ˆ-4
    int256 constant a11 = 106449445891785942956; // eˆ(x11)

    /**
     * @dev Natural exponentiation (e^x) with signed 18 decimal fixed point exponent.
     *
     * Reverts if `x` is smaller than MIN_NATURAL_EXPONENT, or larger than `MAX_NATURAL_EXPONENT`.
     */
    function exp(int256 x) internal pure returns (int256) {
        unchecked {
            require(x >= MIN_NATURAL_EXPONENT && x <= MAX_NATURAL_EXPONENT, "Invalid exponent");

            if (x < 0) {
                // We only handle positive exponents: e^(-x) is computed as 1 / e^x. We can safely make x positive since it
                // fits in the signed 256 bit range (as it is larger than MIN_NATURAL_EXPONENT).
                // Fixed point division requires multiplying by ONE_18.
                return ((ONE_18 * ONE_18) / exp(-x));
            }

            // First, we use the fact that e^(x+y) = e^x * e^y to decompose x into a sum of powers of two, which we call x_n,
            // where x_n == 2^(7 - n), and e^x_n = a_n has been precomputed. We choose the first x_n, x0, to equal 2^7
            // because all larger powers are larger than MAX_NATURAL_EXPONENT, and therefore not present in the
            // decomposition.
            // At the end of this process we will have the product of all e^x_n = a_n that apply, and the remainder of this
            // decomposition, which will be lower than the smallest x_n.
            // exp(x) = k_0 * a_0 * k_1 * a_1 * ... + k_n * a_n * exp(remainder), where each k_n equals either 0 or 1.
            // We mutate x by subtracting x_n, making it the remainder of the decomposition.

            // The first two a_n (e^(2^7) and e^(2^6)) are too large if stored as 18 decimal numbers, and could cause
            // intermediate overflows. Instead we store them as plain integers, with 0 decimals.
            // Additionally, x0 + x1 is larger than MAX_NATURAL_EXPONENT, which means they will not both be present in the
            // decomposition.

            // For each x_n, we test if that term is present in the decomposition (if x is larger than it), and if so deduct
            // it and compute the accumulated product.

            int256 firstAN;
            if (x >= x0) {
                x -= x0;
                firstAN = a0;
            } else if (x >= x1) {
                x -= x1;
                firstAN = a1;
            } else {
                firstAN = 1; // One with no decimal places
            }

            // We now transform x into a 20 decimal fixed point number, to have enhanced precision when computing the
            // smaller terms.
            x *= 100;

            // `product` is the accumulated product of all a_n (except a0 and a1), which starts at 20 decimal fixed point
            // one. Recall that fixed point multiplication requires dividing by ONE_20.
            int256 product = ONE_20;

            if (x >= x2) {
                x -= x2;
                product = (product * a2) / ONE_20;
            }
            if (x >= x3) {
                x -= x3;
                product = (product * a3) / ONE_20;
            }
            if (x >= x4) {
                x -= x4;
                product = (product * a4) / ONE_20;
            }
            if (x >= x5) {
                x -= x5;
                product = (product * a5) / ONE_20;
            }
            if (x >= x6) {
                x -= x6;
                product = (product * a6) / ONE_20;
            }
            if (x >= x7) {
                x -= x7;
                product = (product * a7) / ONE_20;
            }
            if (x >= x8) {
                x -= x8;
                product = (product * a8) / ONE_20;
            }
            if (x >= x9) {
                x -= x9;
                product = (product * a9) / ONE_20;
            }

            // x10 and x11 are unnecessary here since we have high enough precision already.

            // Now we need to compute e^x, where x is small (in particular, it is smaller than x9). We use the Taylor series
            // expansion for e^x: 1 + x + (x^2 / 2!) + (x^3 / 3!) + ... + (x^n / n!).

            int256 seriesSum = ONE_20; // The initial one in the sum, with 20 decimal places.
            int256 term; // Each term in the sum, where the nth term is (x^n / n!).

            // The first term is simply x.
            term = x;
            seriesSum += term;

            // Each term (x^n / n!) equals the previous one times x, divided by n. Since x is a fixed point number,
            // multiplying by it requires dividing by ONE_20, but dividing by the non-fixed point n values does not.

            term = ((term * x) / ONE_20) / 2;
            seriesSum += term;

            term = ((term * x) / ONE_20) / 3;
            seriesSum += term;

            term = ((term * x) / ONE_20) / 4;
            seriesSum += term;

            term = ((term * x) / ONE_20) / 5;
            seriesSum += term;

            term = ((term * x) / ONE_20) / 6;
            seriesSum += term;

            term = ((term * x) / ONE_20) / 7;
            seriesSum += term;

            term = ((term * x) / ONE_20) / 8;
            seriesSum += term;

            term = ((term * x) / ONE_20) / 9;
            seriesSum += term;

            term = ((term * x) / ONE_20) / 10;
            seriesSum += term;

            term = ((term * x) / ONE_20) / 11;
            seriesSum += term;

            term = ((term * x) / ONE_20) / 12;
            seriesSum += term;

            // 12 Taylor terms are sufficient for 18 decimal precision.

            // We now have the first a_n (with no decimals), and the product of all other a_n present, and the Taylor
            // approximation of the exponentiation of the remainder (both with 20 decimals). All that remains is to multiply
            // all three (one 20 decimal fixed point multiplication, dividing by ONE_20, and one integer multiplication),
            // and then drop two digits to return an 18 decimal value.

            return (((product * seriesSum) / ONE_20) * firstAN) / 100;
        }
    }

    /**
     * @dev Natural logarithm (ln(a)) with signed 18 decimal fixed point argument.
     */
    function ln(int256 a) internal pure returns (int256) {
        unchecked {
            // The real natural logarithm is not defined for negative numbers or zero.
            require(a > 0, "out of bounds");
            if (LN_36_LOWER_BOUND < a && a < LN_36_UPPER_BOUND) {
                return _ln_36(a) / ONE_18;
            } else {
                return _ln(a);
            }
        }
    }

    /**
     * @dev Exponentiation (x^y) with unsigned 18 decimal fixed point base and exponent.
     *
     * Reverts if ln(x) * y is smaller than `MIN_NATURAL_EXPONENT`, or larger than `MAX_NATURAL_EXPONENT`.
     */
    function pow(uint256 x, uint256 y) internal pure returns (uint256) {
        unchecked {
            if (y == 0) {
                // We solve the 0^0 indetermination by making it equal one.
                return uint256(ONE_18);
            }

            if (x == 0) {
                return 0;
            }

            // Instead of computing x^y directly, we instead rely on the properties of logarithms and exponentiation to
            // arrive at that r`esult. In particular, exp(ln(x)) = x, and ln(x^y) = y * ln(x). This means
            // x^y = exp(y * ln(x)).

            // The ln function takes a signed value, so we need to make sure x fits in the signed 256 bit range.
            require(x < 2 ** 255, "x out of bounds");
            int256 x_int256 = int256(x);

            // We will compute y * ln(x) in a single step. Depending on the value of x, we can either use ln or ln_36. In
            // both cases, we leave the division by ONE_18 (due to fixed point multiplication) to the end.

            // This prevents y * ln(x) from overflowing, and at the same time guarantees y fits in the signed 256 bit range.
            require(y < MILD_EXPONENT_BOUND, "y out of bounds");
            int256 y_int256 = int256(y);

            int256 logx_times_y;
            if (LN_36_LOWER_BOUND < x_int256 && x_int256 < LN_36_UPPER_BOUND) {
                int256 ln_36_x = _ln_36(x_int256);

                // ln_36_x has 36 decimal places, so multiplying by y_int256 isn't as straightforward, since we can't just
                // bring y_int256 to 36 decimal places, as it might overflow. Instead, we perform two 18 decimal
                // multiplications and add the results: one with the first 18 decimals of ln_36_x, and one with the
                // (downscaled) last 18 decimals.
                logx_times_y = ((ln_36_x / ONE_18) * y_int256 + ((ln_36_x % ONE_18) * y_int256) / ONE_18);
            } else {
                logx_times_y = _ln(x_int256) * y_int256;
            }
            logx_times_y /= ONE_18;

            // Finally, we compute exp(y * ln(x)) to arrive at x^y
            require(
                MIN_NATURAL_EXPONENT <= logx_times_y && logx_times_y <= MAX_NATURAL_EXPONENT,
                "product out of bounds"
            );

            return uint256(exp(logx_times_y));
        }
    }

    /**
     * @dev Internal natural logarithm (ln(a)) with signed 18 decimal fixed point argument.
     */
    function _ln(int256 a) private pure returns (int256) {
        unchecked {
            if (a < ONE_18) {
                // Since ln(a^k) = k * ln(a), we can compute ln(a) as ln(a) = ln((1/a)^(-1)) = - ln((1/a)). If a is less
                // than one, 1/a will be greater than one, and this if statement will not be entered in the recursive call.
                // Fixed point division requires multiplying by ONE_18.
                return (-_ln((ONE_18 * ONE_18) / a));
            }

            // First, we use the fact that ln^(a * b) = ln(a) + ln(b) to decompose ln(a) into a sum of powers of two, which
            // we call x_n, where x_n == 2^(7 - n), which are the natural logarithm of precomputed quantities a_n (that is,
            // ln(a_n) = x_n). We choose the first x_n, x0, to equal 2^7 because the exponential of all larger powers cannot
            // be represented as 18 fixed point decimal numbers in 256 bits, and are therefore larger than a.
            // At the end of this process we will have the sum of all x_n = ln(a_n) that apply, and the remainder of this
            // decomposition, which will be lower than the smallest a_n.
            // ln(a) = k_0 * x_0 + k_1 * x_1 + ... + k_n * x_n + ln(remainder), where each k_n equals either 0 or 1.
            // We mutate a by subtracting a_n, making it the remainder of the decomposition.

            // For reasons related to how `exp` works, the first two a_n (e^(2^7) and e^(2^6)) are not stored as fixed point
            // numbers with 18 decimals, but instead as plain integers with 0 decimals, so we need to multiply them by
            // ONE_18 to convert them to fixed point.
            // For each a_n, we test if that term is present in the decomposition (if a is larger than it), and if so divide
            // by it and compute the accumulated sum.

            int256 sum = 0;
            if (a >= a0 * ONE_18) {
                a /= a0; // Integer, not fixed point division
                sum += x0;
            }

            if (a >= a1 * ONE_18) {
                a /= a1; // Integer, not fixed point division
                sum += x1;
            }

            // All other a_n and x_n are stored as 20 digit fixed point numbers, so we convert the sum and a to this format.
            sum *= 100;
            a *= 100;

            // Because further a_n are  20 digit fixed point numbers, we multiply by ONE_20 when dividing by them.

            if (a >= a2) {
                a = (a * ONE_20) / a2;
                sum += x2;
            }

            if (a >= a3) {
                a = (a * ONE_20) / a3;
                sum += x3;
            }

            if (a >= a4) {
                a = (a * ONE_20) / a4;
                sum += x4;
            }

            if (a >= a5) {
                a = (a * ONE_20) / a5;
                sum += x5;
            }

            if (a >= a6) {
                a = (a * ONE_20) / a6;
                sum += x6;
            }

            if (a >= a7) {
                a = (a * ONE_20) / a7;
                sum += x7;
            }

            if (a >= a8) {
                a = (a * ONE_20) / a8;
                sum += x8;
            }

            if (a >= a9) {
                a = (a * ONE_20) / a9;
                sum += x9;
            }

            if (a >= a10) {
                a = (a * ONE_20) / a10;
                sum += x10;
            }

            if (a >= a11) {
                a = (a * ONE_20) / a11;
                sum += x11;
            }

            // a is now a small number (smaller than a_11, which roughly equals 1.06). This means we can use a Taylor series
            // that converges rapidly for values of `a` close to one - the same one used in ln_36.
            // Let z = (a - 1) / (a + 1).
            // ln(a) = 2 * (z + z^3 / 3 + z^5 / 5 + z^7 / 7 + ... + z^(2 * n + 1) / (2 * n + 1))

            // Recall that 20 digit fixed point division requires multiplying by ONE_20, and multiplication requires
            // division by ONE_20.
            int256 z = ((a - ONE_20) * ONE_20) / (a + ONE_20);
            int256 z_squared = (z * z) / ONE_20;

            // num is the numerator of the series: the z^(2 * n + 1) term
            int256 num = z;

            // seriesSum holds the accumulated sum of each term in the series, starting with the initial z
            int256 seriesSum = num;

            // In each step, the numerator is multiplied by z^2
            num = (num * z_squared) / ONE_20;
            seriesSum += num / 3;

            num = (num * z_squared) / ONE_20;
            seriesSum += num / 5;

            num = (num * z_squared) / ONE_20;
            seriesSum += num / 7;

            num = (num * z_squared) / ONE_20;
            seriesSum += num / 9;

            num = (num * z_squared) / ONE_20;
            seriesSum += num / 11;

            // 6 Taylor terms are sufficient for 36 decimal precision.

            // Finally, we multiply by 2 (non fixed point) to compute ln(remainder)
            seriesSum *= 2;

            // We now have the sum of all x_n present, and the Taylor approximation of the logarithm of the remainder (both
            // with 20 decimals). All that remains is to sum these two, and then drop two digits to return a 18 decimal
            // value.

            return (sum + seriesSum) / 100;
        }
    }

    /**
     * @dev Intrnal high precision (36 decimal places) natural logarithm (ln(x)) with signed 18 decimal fixed point argument,
     * for x close to one.
     *
     * Should only be used if x is between LN_36_LOWER_BOUND and LN_36_UPPER_BOUND.
     */
    function _ln_36(int256 x) private pure returns (int256) {
        unchecked {
            // Since ln(1) = 0, a value of x close to one will yield a very small result, which makes using 36 digits
            // worthwhile.

            // First, we transform x to a 36 digit fixed point value.
            x *= ONE_18;

            // We will use the following Taylor expansion, which converges very rapidly. Let z = (x - 1) / (x + 1).
            // ln(x) = 2 * (z + z^3 / 3 + z^5 / 5 + z^7 / 7 + ... + z^(2 * n + 1) / (2 * n + 1))

            // Recall that 36 digit fixed point division requires multiplying by ONE_36, and multiplication requires
            // division by ONE_36.
            int256 z = ((x - ONE_36) * ONE_36) / (x + ONE_36);
            int256 z_squared = (z * z) / ONE_36;

            // num is the numerator of the series: the z^(2 * n + 1) term
            int256 num = z;

            // seriesSum holds the accumulated sum of each term in the series, starting with the initial z
            int256 seriesSum = num;

            // In each step, the numerator is multiplied by z^2
            num = (num * z_squared) / ONE_36;
            seriesSum += num / 3;

            num = (num * z_squared) / ONE_36;
            seriesSum += num / 5;

            num = (num * z_squared) / ONE_36;
            seriesSum += num / 7;

            num = (num * z_squared) / ONE_36;
            seriesSum += num / 9;

            num = (num * z_squared) / ONE_36;
            seriesSum += num / 11;

            num = (num * z_squared) / ONE_36;
            seriesSum += num / 13;

            num = (num * z_squared) / ONE_36;
            seriesSum += num / 15;

            // 8 Taylor terms are sufficient for 36 decimal precision.

            // All that remains is multiplying by 2 (non fixed point).
            return seriesSum * 2;
        }
    }
}

// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.0;
import "../../interfaces/IPYieldToken.sol";
import "../../interfaces/IPPrincipalToken.sol";

import "./SYUtils.sol";
import "../libraries/math/PMath.sol";

type PYIndex is uint256;

library PYIndexLib {
    using PMath for uint256;
    using PMath for int256;

    function newIndex(IPYieldToken YT) internal returns (PYIndex) {
        return PYIndex.wrap(YT.pyIndexCurrent());
    }

    function syToAsset(PYIndex index, uint256 syAmount) internal pure returns (uint256) {
        return SYUtils.syToAsset(PYIndex.unwrap(index), syAmount);
    }

    function assetToSy(PYIndex index, uint256 assetAmount) internal pure returns (uint256) {
        return SYUtils.assetToSy(PYIndex.unwrap(index), assetAmount);
    }

    function assetToSyUp(PYIndex index, uint256 assetAmount) internal pure returns (uint256) {
        return SYUtils.assetToSyUp(PYIndex.unwrap(index), assetAmount);
    }

    function syToAssetUp(PYIndex index, uint256 syAmount) internal pure returns (uint256) {
        uint256 _index = PYIndex.unwrap(index);
        return SYUtils.syToAssetUp(_index, syAmount);
    }

    function syToAsset(PYIndex index, int256 syAmount) internal pure returns (int256) {
        int256 sign = syAmount < 0 ? int256(-1) : int256(1);
        return sign * (SYUtils.syToAsset(PYIndex.unwrap(index), syAmount.abs())).Int();
    }

    function assetToSy(PYIndex index, int256 assetAmount) internal pure returns (int256) {
        int256 sign = assetAmount < 0 ? int256(-1) : int256(1);
        return sign * (SYUtils.assetToSy(PYIndex.unwrap(index), assetAmount.abs())).Int();
    }

    function assetToSyUp(PYIndex index, int256 assetAmount) internal pure returns (int256) {
        int256 sign = assetAmount < 0 ? int256(-1) : int256(1);
        return sign * (SYUtils.assetToSyUp(PYIndex.unwrap(index), assetAmount.abs())).Int();
    }
}

// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.0;

library MiniHelpers {
    function isCurrentlyExpired(uint256 expiry) internal view returns (bool) {
        return (expiry <= block.timestamp);
    }

    function isExpired(uint256 expiry, uint256 blockTime) internal pure returns (bool) {
        return (expiry <= blockTime);
    }

    function isTimeInThePast(uint256 timestamp) internal view returns (bool) {
        return (timestamp <= block.timestamp); // same definition as isCurrentlyExpired
    }
}

// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.0;

library Errors {
    // BulkSeller
    error BulkInsufficientSyForTrade(uint256 currentAmount, uint256 requiredAmount);
    error BulkInsufficientTokenForTrade(uint256 currentAmount, uint256 requiredAmount);
    error BulkInSufficientSyOut(uint256 actualSyOut, uint256 requiredSyOut);
    error BulkInSufficientTokenOut(uint256 actualTokenOut, uint256 requiredTokenOut);
    error BulkInsufficientSyReceived(uint256 actualBalance, uint256 requiredBalance);
    error BulkNotMaintainer();
    error BulkNotAdmin();
    error BulkSellerAlreadyExisted(address token, address SY, address bulk);
    error BulkSellerInvalidToken(address token, address SY);
    error BulkBadRateTokenToSy(uint256 actualRate, uint256 currentRate, uint256 eps);
    error BulkBadRateSyToToken(uint256 actualRate, uint256 currentRate, uint256 eps);

    // APPROX
    error ApproxFail();
    error ApproxParamsInvalid(uint256 guessMin, uint256 guessMax, uint256 eps);
    error ApproxBinarySearchInputInvalid(
        uint256 approxGuessMin,
        uint256 approxGuessMax,
        uint256 minGuessMin,
        uint256 maxGuessMax
    );

    // MARKET + MARKET MATH CORE
    error MarketExpired();
    error MarketZeroAmountsInput();
    error MarketZeroAmountsOutput();
    error MarketZeroLnImpliedRate();
    error MarketInsufficientPtForTrade(int256 currentAmount, int256 requiredAmount);
    error MarketInsufficientPtReceived(uint256 actualBalance, uint256 requiredBalance);
    error MarketInsufficientSyReceived(uint256 actualBalance, uint256 requiredBalance);
    error MarketZeroTotalPtOrTotalAsset(int256 totalPt, int256 totalAsset);
    error MarketExchangeRateBelowOne(int256 exchangeRate);
    error MarketProportionMustNotEqualOne();
    error MarketRateScalarBelowZero(int256 rateScalar);
    error MarketScalarRootBelowZero(int256 scalarRoot);
    error MarketProportionTooHigh(int256 proportion, int256 maxProportion);

    error OracleUninitialized();
    error OracleTargetTooOld(uint32 target, uint32 oldest);
    error OracleZeroCardinality();

    error MarketFactoryExpiredPt();
    error MarketFactoryInvalidPt();
    error MarketFactoryMarketExists();

    error MarketFactoryLnFeeRateRootTooHigh(uint80 lnFeeRateRoot, uint256 maxLnFeeRateRoot);
    error MarketFactoryOverriddenFeeTooHigh(uint80 overriddenFee, uint256 marketLnFeeRateRoot);
    error MarketFactoryReserveFeePercentTooHigh(uint8 reserveFeePercent, uint8 maxReserveFeePercent);
    error MarketFactoryZeroTreasury();
    error MarketFactoryInitialAnchorTooLow(int256 initialAnchor, int256 minInitialAnchor);
    error MFNotPendleMarket(address addr);

    // ROUTER
    error RouterInsufficientLpOut(uint256 actualLpOut, uint256 requiredLpOut);
    error RouterInsufficientSyOut(uint256 actualSyOut, uint256 requiredSyOut);
    error RouterInsufficientPtOut(uint256 actualPtOut, uint256 requiredPtOut);
    error RouterInsufficientYtOut(uint256 actualYtOut, uint256 requiredYtOut);
    error RouterInsufficientPYOut(uint256 actualPYOut, uint256 requiredPYOut);
    error RouterInsufficientTokenOut(uint256 actualTokenOut, uint256 requiredTokenOut);
    error RouterInsufficientSyRepay(uint256 actualSyRepay, uint256 requiredSyRepay);
    error RouterInsufficientPtRepay(uint256 actualPtRepay, uint256 requiredPtRepay);
    error RouterNotAllSyUsed(uint256 netSyDesired, uint256 netSyUsed);

    error RouterTimeRangeZero();
    error RouterCallbackNotPendleMarket(address caller);
    error RouterInvalidAction(bytes4 selector);
    error RouterInvalidFacet(address facet);

    error RouterKyberSwapDataZero();

    error SimulationResults(bool success, bytes res);

    // YIELD CONTRACT
    error YCExpired();
    error YCNotExpired();
    error YieldContractInsufficientSy(uint256 actualSy, uint256 requiredSy);
    error YCNothingToRedeem();
    error YCPostExpiryDataNotSet();
    error YCNoFloatingSy();

    // YieldFactory
    error YCFactoryInvalidExpiry();
    error YCFactoryYieldContractExisted();
    error YCFactoryZeroExpiryDivisor();
    error YCFactoryZeroTreasury();
    error YCFactoryInterestFeeRateTooHigh(uint256 interestFeeRate, uint256 maxInterestFeeRate);
    error YCFactoryRewardFeeRateTooHigh(uint256 newRewardFeeRate, uint256 maxRewardFeeRate);

    // SY
    error SYInvalidTokenIn(address token);
    error SYInvalidTokenOut(address token);
    error SYZeroDeposit();
    error SYZeroRedeem();
    error SYInsufficientSharesOut(uint256 actualSharesOut, uint256 requiredSharesOut);
    error SYInsufficientTokenOut(uint256 actualTokenOut, uint256 requiredTokenOut);

    // SY-specific
    error SYQiTokenMintFailed(uint256 errCode);
    error SYQiTokenRedeemFailed(uint256 errCode);
    error SYQiTokenRedeemRewardsFailed(uint256 rewardAccruedType0, uint256 rewardAccruedType1);
    error SYQiTokenBorrowRateTooHigh(uint256 borrowRate, uint256 borrowRateMax);

    error SYCurveInvalidPid();
    error SYCurve3crvPoolNotFound();

    error SYApeDepositAmountTooSmall(uint256 amountDeposited);
    error SYBalancerInvalidPid();
    error SYInvalidRewardToken(address token);

    error SYStargateRedeemCapExceeded(uint256 amountLpDesired, uint256 amountLpRedeemable);

    error SYBalancerReentrancy();

    error NotFromTrustedRemote(uint16 srcChainId, bytes path);

    error ApxETHNotEnoughBuffer();

    // Liquidity Mining
    error VCInactivePool(address pool);
    error VCPoolAlreadyActive(address pool);
    error VCZeroVePendle(address user);
    error VCExceededMaxWeight(uint256 totalWeight, uint256 maxWeight);
    error VCEpochNotFinalized(uint256 wTime);
    error VCPoolAlreadyAddAndRemoved(address pool);

    error VEInvalidNewExpiry(uint256 newExpiry);
    error VEExceededMaxLockTime();
    error VEInsufficientLockTime();
    error VENotAllowedReduceExpiry();
    error VEZeroAmountLocked();
    error VEPositionNotExpired();
    error VEZeroPosition();
    error VEZeroSlope(uint128 bias, uint128 slope);
    error VEReceiveOldSupply(uint256 msgTime);

    error GCNotPendleMarket(address caller);
    error GCNotVotingController(address caller);

    error InvalidWTime(uint256 wTime);
    error ExpiryInThePast(uint256 expiry);
    error ChainNotSupported(uint256 chainId);

    error FDTotalAmountFundedNotMatch(uint256 actualTotalAmount, uint256 expectedTotalAmount);
    error FDEpochLengthMismatch();
    error FDInvalidPool(address pool);
    error FDPoolAlreadyExists(address pool);
    error FDInvalidNewFinishedEpoch(uint256 oldFinishedEpoch, uint256 newFinishedEpoch);
    error FDInvalidStartEpoch(uint256 startEpoch);
    error FDInvalidWTimeFund(uint256 lastFunded, uint256 wTime);
    error FDFutureFunding(uint256 lastFunded, uint256 currentWTime);

    error BDInvalidEpoch(uint256 epoch, uint256 startTime);

    // Cross-Chain
    error MsgNotFromSendEndpoint(uint16 srcChainId, bytes path);
    error MsgNotFromReceiveEndpoint(address sender);
    error InsufficientFeeToSendMsg(uint256 currentFee, uint256 requiredFee);
    error ApproxDstExecutionGasNotSet();
    error InvalidRetryData();

    // GENERIC MSG
    error ArrayLengthMismatch();
    error ArrayEmpty();
    error ArrayOutOfBounds();
    error ZeroAddress();
    error FailedToSendEther();
    error InvalidMerkleProof();

    error OnlyLayerZeroEndpoint();
    error OnlyYT();
    error OnlyYCFactory();
    error OnlyWhitelisted();

    // Swap Aggregator
    error SAInsufficientTokenIn(address tokenIn, uint256 amountExpected, uint256 amountActual);
    error UnsupportedSelector(uint256 aggregatorType, bytes4 selector);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.20;

import {IERC20} from "../IERC20.sol";

/**
 * @dev Interface for the optional metadata functions from the ERC-20 standard.
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the symbol of the token.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC721.sol)

pragma solidity ^0.8.20;

import {IERC721} from "../token/ERC721/IERC721.sol";

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/math/Math.sol)

pragma solidity ^0.8.20;

import {Panic} from "../Panic.sol";
import {SafeCast} from "./SafeCast.sol";

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    enum Rounding {
        Floor, // Toward negative infinity
        Ceil, // Toward positive infinity
        Trunc, // Toward zero
        Expand // Away from zero
    }

    /**
     * @dev Returns the addition of two unsigned integers, with an success flag (no overflow).
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool success, uint256 result) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, with an success flag (no overflow).
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool success, uint256 result) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an success flag (no overflow).
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool success, uint256 result) {
        unchecked {
            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
            // benefit is lost if 'b' is also tested.
            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a success flag (no division by zero).
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool success, uint256 result) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a success flag (no division by zero).
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool success, uint256 result) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two numbers. The result is rounded towards
     * zero.
     */
    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow.
        return (a & b) + (a ^ b) / 2;
    }

    /**
     * @dev Returns the ceiling of the division of two numbers.
     *
     * This differs from standard division with `/` in that it rounds towards infinity instead
     * of rounding towards zero.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        if (b == 0) {
            // Guarantee the same behavior as in a regular Solidity division.
            Panic.panic(Panic.DIVISION_BY_ZERO);
        }

        // The following calculation ensures accurate ceiling division without overflow.
        // Since a is non-zero, (a - 1) / b will not overflow.
        // The largest possible result occurs when (a - 1) / b is type(uint256).max,
        // but the largest value we can obtain is type(uint256).max - 1, which happens
        // when a = type(uint256).max and b = 1.
        unchecked {
            return a == 0 ? 0 : (a - 1) / b + 1;
        }
    }

    /**
     * @dev Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or
     * denominator == 0.
     *
     * Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv) with further edits by
     * Uniswap Labs also under MIT license.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) {
        unchecked {
            // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2²⁵⁶ and mod 2²⁵⁶ - 1, then use
            // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
            // variables such that product = prod1 * 2²⁵⁶ + prod0.
            uint256 prod0 = x * y; // Least significant 256 bits of the product
            uint256 prod1; // Most significant 256 bits of the product
            assembly {
                let mm := mulmod(x, y, not(0))
                prod1 := sub(sub(mm, prod0), lt(mm, prod0))
            }

            // Handle non-overflow cases, 256 by 256 division.
            if (prod1 == 0) {
                // Solidity will revert if denominator == 0, unlike the div opcode on its own.
                // The surrounding unchecked block does not change this fact.
                // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.
                return prod0 / denominator;
            }

            // Make sure the result is less than 2²⁵⁶. Also prevents denominator == 0.
            if (denominator <= prod1) {
                Panic.panic(denominator == 0 ? Panic.DIVISION_BY_ZERO : Panic.UNDER_OVERFLOW);
            }

            ///////////////////////////////////////////////
            // 512 by 256 division.
            ///////////////////////////////////////////////

            // Make division exact by subtracting the remainder from [prod1 prod0].
            uint256 remainder;
            assembly {
                // Compute remainder using mulmod.
                remainder := mulmod(x, y, denominator)

                // Subtract 256 bit number from 512 bit number.
                prod1 := sub(prod1, gt(remainder, prod0))
                prod0 := sub(prod0, remainder)
            }

            // Factor powers of two out of denominator and compute largest power of two divisor of denominator.
            // Always >= 1. See https://cs.stackexchange.com/q/138556/92363.

            uint256 twos = denominator & (0 - denominator);
            assembly {
                // Divide denominator by twos.
                denominator := div(denominator, twos)

                // Divide [prod1 prod0] by twos.
                prod0 := div(prod0, twos)

                // Flip twos such that it is 2²⁵⁶ / twos. If twos is zero, then it becomes one.
                twos := add(div(sub(0, twos), twos), 1)
            }

            // Shift in bits from prod1 into prod0.
            prod0 |= prod1 * twos;

            // Invert denominator mod 2²⁵⁶. Now that denominator is an odd number, it has an inverse modulo 2²⁵⁶ such
            // that denominator * inv ≡ 1 mod 2²⁵⁶. Compute the inverse by starting with a seed that is correct for
            // four bits. That is, denominator * inv ≡ 1 mod 2⁴.
            uint256 inverse = (3 * denominator) ^ 2;

            // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also
            // works in modular arithmetic, doubling the correct bits in each step.
            inverse *= 2 - denominator * inverse; // inverse mod 2⁸
            inverse *= 2 - denominator * inverse; // inverse mod 2¹⁶
            inverse *= 2 - denominator * inverse; // inverse mod 2³²
            inverse *= 2 - denominator * inverse; // inverse mod 2⁶⁴
            inverse *= 2 - denominator * inverse; // inverse mod 2¹²⁸
            inverse *= 2 - denominator * inverse; // inverse mod 2²⁵⁶

            // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
            // This will give us the correct result modulo 2²⁵⁶. Since the preconditions guarantee that the outcome is
            // less than 2²⁵⁶, this is the final result. We don't need to compute the high bits of the result and prod1
            // is no longer required.
            result = prod0 * inverse;
            return result;
        }
    }

    /**
     * @dev Calculates x * y / denominator with full precision, following the selected rounding direction.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) {
        return mulDiv(x, y, denominator) + SafeCast.toUint(unsignedRoundsUp(rounding) && mulmod(x, y, denominator) > 0);
    }

    /**
     * @dev Calculate the modular multiplicative inverse of a number in Z/nZ.
     *
     * If n is a prime, then Z/nZ is a field. In that case all elements are inversible, expect 0.
     * If n is not a prime, then Z/nZ is not a field, and some elements might not be inversible.
     *
     * If the input value is not inversible, 0 is returned.
     *
     * NOTE: If you know for sure that n is (big) a prime, it may be cheaper to use Ferma's little theorem and get the
     * inverse using `Math.modExp(a, n - 2, n)`.
     */
    function invMod(uint256 a, uint256 n) internal pure returns (uint256) {
        unchecked {
            if (n == 0) return 0;

            // The inverse modulo is calculated using the Extended Euclidean Algorithm (iterative version)
            // Used to compute integers x and y such that: ax + ny = gcd(a, n).
            // When the gcd is 1, then the inverse of a modulo n exists and it's x.
            // ax + ny = 1
            // ax = 1 + (-y)n
            // ax ≡ 1 (mod n) # x is the inverse of a modulo n

            // If the remainder is 0 the gcd is n right away.
            uint256 remainder = a % n;
            uint256 gcd = n;

            // Therefore the initial coefficients are:
            // ax + ny = gcd(a, n) = n
            // 0a + 1n = n
            int256 x = 0;
            int256 y = 1;

            while (remainder != 0) {
                uint256 quotient = gcd / remainder;

                (gcd, remainder) = (
                    // The old remainder is the next gcd to try.
                    remainder,
                    // Compute the next remainder.
                    // Can't overflow given that (a % gcd) * (gcd // (a % gcd)) <= gcd
                    // where gcd is at most n (capped to type(uint256).max)
                    gcd - remainder * quotient
                );

                (x, y) = (
                    // Increment the coefficient of a.
                    y,
                    // Decrement the coefficient of n.
                    // Can overflow, but the result is casted to uint256 so that the
                    // next value of y is "wrapped around" to a value between 0 and n - 1.
                    x - y * int256(quotient)
                );
            }

            if (gcd != 1) return 0; // No inverse exists.
            return x < 0 ? (n - uint256(-x)) : uint256(x); // Wrap the result if it's negative.
        }
    }

    /**
     * @dev Returns the modular exponentiation of the specified base, exponent and modulus (b ** e % m)
     *
     * Requirements:
     * - modulus can't be zero
     * - underlying staticcall to precompile must succeed
     *
     * IMPORTANT: The result is only valid if the underlying call succeeds. When using this function, make
     * sure the chain you're using it on supports the precompiled contract for modular exponentiation
     * at address 0x05 as specified in https://eips.ethereum.org/EIPS/eip-198[EIP-198]. Otherwise,
     * the underlying function will succeed given the lack of a revert, but the result may be incorrectly
     * interpreted as 0.
     */
    function modExp(uint256 b, uint256 e, uint256 m) internal view returns (uint256) {
        (bool success, uint256 result) = tryModExp(b, e, m);
        if (!success) {
            Panic.panic(Panic.DIVISION_BY_ZERO);
        }
        return result;
    }

    /**
     * @dev Returns the modular exponentiation of the specified base, exponent and modulus (b ** e % m).
     * It includes a success flag indicating if the operation succeeded. Operation will be marked has failed if trying
     * to operate modulo 0 or if the underlying precompile reverted.
     *
     * IMPORTANT: The result is only valid if the success flag is true. When using this function, make sure the chain
     * you're using it on supports the precompiled contract for modular exponentiation at address 0x05 as specified in
     * https://eips.ethereum.org/EIPS/eip-198[EIP-198]. Otherwise, the underlying function will succeed given the lack
     * of a revert, but the result may be incorrectly interpreted as 0.
     */
    function tryModExp(uint256 b, uint256 e, uint256 m) internal view returns (bool success, uint256 result) {
        if (m == 0) return (false, 0);
        /// @solidity memory-safe-assembly
        assembly {
            let ptr := mload(0x40)
            // | Offset    | Content    | Content (Hex)                                                      |
            // |-----------|------------|--------------------------------------------------------------------|
            // | 0x00:0x1f | size of b  | 0x0000000000000000000000000000000000000000000000000000000000000020 |
            // | 0x20:0x3f | size of e  | 0x0000000000000000000000000000000000000000000000000000000000000020 |
            // | 0x40:0x5f | size of m  | 0x0000000000000000000000000000000000000000000000000000000000000020 |
            // | 0x60:0x7f | value of b | 0x<.............................................................b> |
            // | 0x80:0x9f | value of e | 0x<.............................................................e> |
            // | 0xa0:0xbf | value of m | 0x<.............................................................m> |
            mstore(ptr, 0x20)
            mstore(add(ptr, 0x20), 0x20)
            mstore(add(ptr, 0x40), 0x20)
            mstore(add(ptr, 0x60), b)
            mstore(add(ptr, 0x80), e)
            mstore(add(ptr, 0xa0), m)

            // Given the result < m, it's guaranteed to fit in 32 bytes,
            // so we can use the memory scratch space located at offset 0.
            success := staticcall(gas(), 0x05, ptr, 0xc0, 0x00, 0x20)
            result := mload(0x00)
        }
    }

    /**
     * @dev Variant of {modExp} that supports inputs of arbitrary length.
     */
    function modExp(bytes memory b, bytes memory e, bytes memory m) internal view returns (bytes memory) {
        (bool success, bytes memory result) = tryModExp(b, e, m);
        if (!success) {
            Panic.panic(Panic.DIVISION_BY_ZERO);
        }
        return result;
    }

    /**
     * @dev Variant of {tryModExp} that supports inputs of arbitrary length.
     */
    function tryModExp(
        bytes memory b,
        bytes memory e,
        bytes memory m
    ) internal view returns (bool success, bytes memory result) {
        if (_zeroBytes(m)) return (false, new bytes(0));

        uint256 mLen = m.length;

        // Encode call args in result and move the free memory pointer
        result = abi.encodePacked(b.length, e.length, mLen, b, e, m);

        /// @solidity memory-safe-assembly
        assembly {
            let dataPtr := add(result, 0x20)
            // Write result on top of args to avoid allocating extra memory.
            success := staticcall(gas(), 0x05, dataPtr, mload(result), dataPtr, mLen)
            // Overwrite the length.
            // result.length > returndatasize() is guaranteed because returndatasize() == m.length
            mstore(result, mLen)
            // Set the memory pointer after the returned data.
            mstore(0x40, add(dataPtr, mLen))
        }
    }

    /**
     * @dev Returns whether the provided byte array is zero.
     */
    function _zeroBytes(bytes memory byteArray) private pure returns (bool) {
        for (uint256 i = 0; i < byteArray.length; ++i) {
            if (byteArray[i] != 0) {
                return false;
            }
        }
        return true;
    }

    /**
     * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded
     * towards zero.
     *
     * This method is based on Newton's method for computing square roots; the algorithm is restricted to only
     * using integer operations.
     */
    function sqrt(uint256 a) internal pure returns (uint256) {
        unchecked {
            // Take care of easy edge cases when a == 0 or a == 1
            if (a <= 1) {
                return a;
            }

            // In this function, we use Newton's method to get a root of `f(x) := x² - a`. It involves building a
            // sequence x_n that converges toward sqrt(a). For each iteration x_n, we also define the error between
            // the current value as `ε_n = | x_n - sqrt(a) |`.
            //
            // For our first estimation, we consider `e` the smallest power of 2 which is bigger than the square root
            // of the target. (i.e. `2**(e-1) ≤ sqrt(a) < 2**e`). We know that `e ≤ 128` because `(2¹²⁸)² = 2²⁵⁶` is
            // bigger than any uint256.
            //
            // By noticing that
            // `2**(e-1) ≤ sqrt(a) < 2**e → (2**(e-1))² ≤ a < (2**e)² → 2**(2*e-2) ≤ a < 2**(2*e)`
            // we can deduce that `e - 1` is `log2(a) / 2`. We can thus compute `x_n = 2**(e-1)` using a method similar
            // to the msb function.
            uint256 aa = a;
            uint256 xn = 1;

            if (aa >= (1 << 128)) {
                aa >>= 128;
                xn <<= 64;
            }
            if (aa >= (1 << 64)) {
                aa >>= 64;
                xn <<= 32;
            }
            if (aa >= (1 << 32)) {
                aa >>= 32;
                xn <<= 16;
            }
            if (aa >= (1 << 16)) {
                aa >>= 16;
                xn <<= 8;
            }
            if (aa >= (1 << 8)) {
                aa >>= 8;
                xn <<= 4;
            }
            if (aa >= (1 << 4)) {
                aa >>= 4;
                xn <<= 2;
            }
            if (aa >= (1 << 2)) {
                xn <<= 1;
            }

            // We now have x_n such that `x_n = 2**(e-1) ≤ sqrt(a) < 2**e = 2 * x_n`. This implies ε_n ≤ 2**(e-1).
            //
            // We can refine our estimation by noticing that the middle of that interval minimizes the error.
            // If we move x_n to equal 2**(e-1) + 2**(e-2), then we reduce the error to ε_n ≤ 2**(e-2).
            // This is going to be our x_0 (and ε_0)
            xn = (3 * xn) >> 1; // ε_0 := | x_0 - sqrt(a) | ≤ 2**(e-2)

            // From here, Newton's method give us:
            // x_{n+1} = (x_n + a / x_n) / 2
            //
            // One should note that:
            // x_{n+1}² - a = ((x_n + a / x_n) / 2)² - a
            //              = ((x_n² + a) / (2 * x_n))² - a
            //              = (x_n⁴ + 2 * a * x_n² + a²) / (4 * x_n²) - a
            //              = (x_n⁴ + 2 * a * x_n² + a² - 4 * a * x_n²) / (4 * x_n²)
            //              = (x_n⁴ - 2 * a * x_n² + a²) / (4 * x_n²)
            //              = (x_n² - a)² / (2 * x_n)²
            //              = ((x_n² - a) / (2 * x_n))²
            //              ≥ 0
            // Which proves that for all n ≥ 1, sqrt(a) ≤ x_n
            //
            // This gives us the proof of quadratic convergence of the sequence:
            // ε_{n+1} = | x_{n+1} - sqrt(a) |
            //         = | (x_n + a / x_n) / 2 - sqrt(a) |
            //         = | (x_n² + a - 2*x_n*sqrt(a)) / (2 * x_n) |
            //         = | (x_n - sqrt(a))² / (2 * x_n) |
            //         = | ε_n² / (2 * x_n) |
            //         = ε_n² / | (2 * x_n) |
            //
            // For the first iteration, we have a special case where x_0 is known:
            // ε_1 = ε_0² / | (2 * x_0) |
            //     ≤ (2**(e-2))² / (2 * (2**(e-1) + 2**(e-2)))
            //     ≤ 2**(2*e-4) / (3 * 2**(e-1))
            //     ≤ 2**(e-3) / 3
            //     ≤ 2**(e-3-log2(3))
            //     ≤ 2**(e-4.5)
            //
            // For the following iterations, we use the fact that, 2**(e-1) ≤ sqrt(a) ≤ x_n:
            // ε_{n+1} = ε_n² / | (2 * x_n) |
            //         ≤ (2**(e-k))² / (2 * 2**(e-1))
            //         ≤ 2**(2*e-2*k) / 2**e
            //         ≤ 2**(e-2*k)
            xn = (xn + a / xn) >> 1; // ε_1 := | x_1 - sqrt(a) | ≤ 2**(e-4.5)  -- special case, see above
            xn = (xn + a / xn) >> 1; // ε_2 := | x_2 - sqrt(a) | ≤ 2**(e-9)    -- general case with k = 4.5
            xn = (xn + a / xn) >> 1; // ε_3 := | x_3 - sqrt(a) | ≤ 2**(e-18)   -- general case with k = 9
            xn = (xn + a / xn) >> 1; // ε_4 := | x_4 - sqrt(a) | ≤ 2**(e-36)   -- general case with k = 18
            xn = (xn + a / xn) >> 1; // ε_5 := | x_5 - sqrt(a) | ≤ 2**(e-72)   -- general case with k = 36
            xn = (xn + a / xn) >> 1; // ε_6 := | x_6 - sqrt(a) | ≤ 2**(e-144)  -- general case with k = 72

            // Because e ≤ 128 (as discussed during the first estimation phase), we know have reached a precision
            // ε_6 ≤ 2**(e-144) < 1. Given we're operating on integers, then we can ensure that xn is now either
            // sqrt(a) or sqrt(a) + 1.
            return xn - SafeCast.toUint(xn > a / xn);
        }
    }

    /**
     * @dev Calculates sqrt(a), following the selected rounding direction.
     */
    function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = sqrt(a);
            return result + SafeCast.toUint(unsignedRoundsUp(rounding) && result * result < a);
        }
    }

    /**
     * @dev Return the log in base 2 of a positive value rounded towards zero.
     * Returns 0 if given 0.
     */
    function log2(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        uint256 exp;
        unchecked {
            exp = 128 * SafeCast.toUint(value > (1 << 128) - 1);
            value >>= exp;
            result += exp;

            exp = 64 * SafeCast.toUint(value > (1 << 64) - 1);
            value >>= exp;
            result += exp;

            exp = 32 * SafeCast.toUint(value > (1 << 32) - 1);
            value >>= exp;
            result += exp;

            exp = 16 * SafeCast.toUint(value > (1 << 16) - 1);
            value >>= exp;
            result += exp;

            exp = 8 * SafeCast.toUint(value > (1 << 8) - 1);
            value >>= exp;
            result += exp;

            exp = 4 * SafeCast.toUint(value > (1 << 4) - 1);
            value >>= exp;
            result += exp;

            exp = 2 * SafeCast.toUint(value > (1 << 2) - 1);
            value >>= exp;
            result += exp;

            result += SafeCast.toUint(value > 1);
        }
        return result;
    }

    /**
     * @dev Return the log in base 2, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log2(value);
            return result + SafeCast.toUint(unsignedRoundsUp(rounding) && 1 << result < value);
        }
    }

    /**
     * @dev Return the log in base 10 of a positive value rounded towards zero.
     * Returns 0 if given 0.
     */
    function log10(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >= 10 ** 64) {
                value /= 10 ** 64;
                result += 64;
            }
            if (value >= 10 ** 32) {
                value /= 10 ** 32;
                result += 32;
            }
            if (value >= 10 ** 16) {
                value /= 10 ** 16;
                result += 16;
            }
            if (value >= 10 ** 8) {
                value /= 10 ** 8;
                result += 8;
            }
            if (value >= 10 ** 4) {
                value /= 10 ** 4;
                result += 4;
            }
            if (value >= 10 ** 2) {
                value /= 10 ** 2;
                result += 2;
            }
            if (value >= 10 ** 1) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log10(value);
            return result + SafeCast.toUint(unsignedRoundsUp(rounding) && 10 ** result < value);
        }
    }

    /**
     * @dev Return the log in base 256 of a positive value rounded towards zero.
     * Returns 0 if given 0.
     *
     * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
     */
    function log256(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        uint256 isGt;
        unchecked {
            isGt = SafeCast.toUint(value > (1 << 128) - 1);
            value >>= isGt * 128;
            result += isGt * 16;

            isGt = SafeCast.toUint(value > (1 << 64) - 1);
            value >>= isGt * 64;
            result += isGt * 8;

            isGt = SafeCast.toUint(value > (1 << 32) - 1);
            value >>= isGt * 32;
            result += isGt * 4;

            isGt = SafeCast.toUint(value > (1 << 16) - 1);
            value >>= isGt * 16;
            result += isGt * 2;

            result += SafeCast.toUint(value > (1 << 8) - 1);
        }
        return result;
    }

    /**
     * @dev Return the log in base 256, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log256(value);
            return result + SafeCast.toUint(unsignedRoundsUp(rounding) && 1 << (result << 3) < value);
        }
    }

    /**
     * @dev Returns whether a provided rounding mode is considered rounding up for unsigned integers.
     */
    function unsignedRoundsUp(Rounding rounding) internal pure returns (bool) {
        return uint8(rounding) % 2 == 1;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/math/SignedMath.sol)

pragma solidity ^0.8.20;

/**
 * @dev Standard signed math utilities missing in the Solidity language.
 */
library SignedMath {
    /**
     * @dev Returns the largest of two signed numbers.
     */
    function max(int256 a, int256 b) internal pure returns (int256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two signed numbers.
     */
    function min(int256 a, int256 b) internal pure returns (int256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two signed numbers without overflow.
     * The result is rounded towards zero.
     */
    function average(int256 a, int256 b) internal pure returns (int256) {
        // Formula from the book "Hacker's Delight"
        int256 x = (a & b) + ((a ^ b) >> 1);
        return x + (int256(uint256(x) >> 255) & (a ^ b));
    }

    /**
     * @dev Returns the absolute unsigned value of a signed value.
     */
    function abs(int256 n) internal pure returns (uint256) {
        unchecked {
            // Formula from the "Bit Twiddling Hacks" by Sean Eron Anderson.
            // Since `n` is a signed integer, the generated bytecode will use the SAR opcode to perform the right shift,
            // taking advantage of the most significant (or "sign" bit) in two's complement representation.
            // This opcode adds new most significant bits set to the value of the previous most significant bit. As a result,
            // the mask will either be `bytes(0)` (if n is positive) or `~bytes32(0)` (if n is negative).
            int256 mask = n >> 255;

            // A `bytes(0)` mask leaves the input unchanged, while a `~bytes32(0)` mask complements it.
            return uint256((n + mask) ^ mask);
        }
    }
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.28;

import {Math} from "openzeppelin5/utils/math/Math.sol";

import {ISiloOracle} from "../interfaces/ISiloOracle.sol";
import {SiloStdLib, ISiloConfig, IShareToken, ISilo} from "./SiloStdLib.sol";
import {SiloMathLib} from "./SiloMathLib.sol";
import {Rounding} from "./Rounding.sol";

library SiloSolvencyLib {
    using Math for uint256;

    struct LtvData {
        ISiloOracle collateralOracle;
        ISiloOracle debtOracle;
        uint256 borrowerProtectedAssets;
        uint256 borrowerCollateralAssets;
        uint256 borrowerDebtAssets;
    }

    uint256 internal constant _PRECISION_DECIMALS = 1e18;
    uint256 internal constant _INFINITY = type(uint256).max;

    /// @notice Determines if a borrower is solvent based on the Loan-to-Value (LTV) ratio
    /// @param _collateralConfig Configuration data for the collateral
    /// @param _debtConfig Configuration data for the debt
    /// @param _borrower Address of the borrower to check solvency for
    /// @param _accrueInMemory Determines whether or not to consider un-accrued interest in calculations
    /// @return True if the borrower is solvent, false otherwise
    function isSolvent(
        ISiloConfig.ConfigData memory _collateralConfig,
        ISiloConfig.ConfigData memory _debtConfig,
        address _borrower,
        ISilo.AccrueInterestInMemory _accrueInMemory
    ) internal view returns (bool) {
        if (_debtConfig.silo == address(0)) return true; // no debt, so solvent

        uint256 ltv = getLtv(
            _collateralConfig,
            _debtConfig,
            _borrower,
            ISilo.OracleType.Solvency,
            _accrueInMemory,
            IShareToken(_debtConfig.debtShareToken).balanceOf(_borrower)
        );

        return ltv <= _collateralConfig.lt;
    }

    /// @notice Determines if a borrower's Loan-to-Value (LTV) ratio is below the maximum allowed LTV
    /// @param _collateralConfig Configuration data for the collateral
    /// @param _debtConfig Configuration data for the debt
    /// @param _borrower Address of the borrower to check against max LTV
    /// @param _accrueInMemory Determines whether or not to consider un-accrued interest in calculations
    /// @return True if the borrower's LTV is below the maximum, false otherwise
    function isBelowMaxLtv(
        ISiloConfig.ConfigData memory _collateralConfig,
        ISiloConfig.ConfigData memory _debtConfig,
        address _borrower,
        ISilo.AccrueInterestInMemory _accrueInMemory
    ) internal view returns (bool) {
        uint256 debtShareBalance = IShareToken(_debtConfig.debtShareToken).balanceOf(_borrower);
        if (debtShareBalance == 0) return true;

        uint256 ltv = getLtv(
            _collateralConfig,
            _debtConfig,
            _borrower,
            ISilo.OracleType.MaxLtv,
            _accrueInMemory,
            debtShareBalance
        );

        return ltv <= _collateralConfig.maxLtv;
    }

    /// @notice Retrieves assets data required for LTV calculations
    /// @param _collateralConfig Configuration data for the collateral
    /// @param _debtConfig Configuration data for the debt
    /// @param _borrower Address of the borrower whose LTV data is to be calculated
    /// @param _oracleType Specifies whether to use the MaxLTV or Solvency oracle type for calculations
    /// @param _accrueInMemory Determines whether or not to consider un-accrued interest in calculations
    /// @param _debtShareBalanceCached Cached value of debt share balance for the borrower. If debt shares of
    /// `_borrower` is unknown, simply pass `0`.
    /// @return ltvData Data structure containing necessary data to compute LTV
    function getAssetsDataForLtvCalculations( // solhint-disable-line function-max-lines
        ISiloConfig.ConfigData memory _collateralConfig,
        ISiloConfig.ConfigData memory _debtConfig,
        address _borrower,
        ISilo.OracleType _oracleType,
        ISilo.AccrueInterestInMemory _accrueInMemory,
        uint256 _debtShareBalanceCached
    ) internal view returns (LtvData memory ltvData) {
        if (_collateralConfig.token != _debtConfig.token) {
            // When calculating maxLtv, use maxLtv oracle.
            (ltvData.collateralOracle, ltvData.debtOracle) = _oracleType == ISilo.OracleType.MaxLtv
                ? (ISiloOracle(_collateralConfig.maxLtvOracle), ISiloOracle(_debtConfig.maxLtvOracle))
                : (ISiloOracle(_collateralConfig.solvencyOracle), ISiloOracle(_debtConfig.solvencyOracle));
        }

        uint256 totalShares;
        uint256 shares;

        (shares, totalShares) = SiloStdLib.getSharesAndTotalSupply(
            _collateralConfig.protectedShareToken, _borrower, 0 /* no cache */
        );

        (
            uint256 totalCollateralAssets, uint256 totalProtectedAssets
        ) = ISilo(_collateralConfig.silo).getCollateralAndProtectedTotalsStorage();

        ltvData.borrowerProtectedAssets = SiloMathLib.convertToAssets(
            shares, totalProtectedAssets, totalShares, Rounding.COLLATERAL_TO_ASSETS, ISilo.AssetType.Protected
        );

        (shares, totalShares) = SiloStdLib.getSharesAndTotalSupply(
            _collateralConfig.collateralShareToken, _borrower, 0 /* no cache */
        );

        totalCollateralAssets = _accrueInMemory == ISilo.AccrueInterestInMemory.Yes
            ? SiloStdLib.getTotalCollateralAssetsWithInterest(
                _collateralConfig.silo,
                _collateralConfig.interestRateModel,
                _collateralConfig.daoFee,
                _collateralConfig.deployerFee
            )
            : totalCollateralAssets;

        ltvData.borrowerCollateralAssets = SiloMathLib.convertToAssets(
            shares, totalCollateralAssets, totalShares, Rounding.COLLATERAL_TO_ASSETS, ISilo.AssetType.Collateral
        );

        (shares, totalShares) = SiloStdLib.getSharesAndTotalSupply(
            _debtConfig.debtShareToken, _borrower, _debtShareBalanceCached
        );

        uint256 totalDebtAssets = _accrueInMemory == ISilo.AccrueInterestInMemory.Yes
            ? SiloStdLib.getTotalDebtAssetsWithInterest(_debtConfig.silo, _debtConfig.interestRateModel)
            : ISilo(_debtConfig.silo).getTotalAssetsStorage(ISilo.AssetType.Debt);

        // BORROW value -> to assets -> UP
        ltvData.borrowerDebtAssets = SiloMathLib.convertToAssets(
            shares, totalDebtAssets, totalShares, Rounding.DEBT_TO_ASSETS, ISilo.AssetType.Debt
        );
    }

    /// @notice Calculates the Loan-To-Value (LTV) ratio for a given borrower
    /// @param _collateralConfig Configuration data related to the collateral asset
    /// @param _debtConfig Configuration data related to the debt asset
    /// @param _borrower Address of the borrower whose LTV is to be computed
    /// @param _oracleType Oracle type to use for fetching the asset prices
    /// @param _accrueInMemory Determines whether or not to consider un-accrued interest in calculations
    /// @return ltvInDp The computed LTV ratio in 18 decimals precision
    function getLtv(
        ISiloConfig.ConfigData memory _collateralConfig,
        ISiloConfig.ConfigData memory _debtConfig,
        address _borrower,
        ISilo.OracleType _oracleType,
        ISilo.AccrueInterestInMemory _accrueInMemory,
        uint256 _debtShareBalance
    ) internal view returns (uint256 ltvInDp) {
        if (_debtShareBalance == 0) return 0;

        LtvData memory ltvData = getAssetsDataForLtvCalculations(
            _collateralConfig, _debtConfig, _borrower, _oracleType, _accrueInMemory, _debtShareBalance
        );

        if (ltvData.borrowerDebtAssets == 0) return 0;

        (,, ltvInDp) = calculateLtv(ltvData, _collateralConfig.token, _debtConfig.token);
    }

    /// @notice Calculates the Loan-to-Value (LTV) ratio based on provided collateral and debt data
    /// @dev calculation never reverts, if there is revert, then it is because of oracle
    /// @param _ltvData Data structure containing relevant information to calculate LTV
    /// @param _collateralToken Address of the collateral token
    /// @param _debtAsset Address of the debt token
    /// @return sumOfBorrowerCollateralValue Total value of borrower's collateral
    /// @return totalBorrowerDebtValue Total debt value for the borrower
    /// @return ltvInDp Calculated LTV in 18 decimal precision
    function calculateLtv(
        SiloSolvencyLib.LtvData memory _ltvData, address _collateralToken, address _debtAsset)
        internal
        view
        returns (uint256 sumOfBorrowerCollateralValue, uint256 totalBorrowerDebtValue, uint256 ltvInDp)
    {
        (
            sumOfBorrowerCollateralValue, totalBorrowerDebtValue
        ) = getPositionValues(_ltvData, _collateralToken, _debtAsset);

        if (sumOfBorrowerCollateralValue == 0 && totalBorrowerDebtValue == 0) {
            return (0, 0, 0);
        } else if (sumOfBorrowerCollateralValue == 0) {
            ltvInDp = _INFINITY;
        } else {
            ltvInDp = ltvMath(totalBorrowerDebtValue, sumOfBorrowerCollateralValue);
        }
    }

    /// @notice Computes the value of collateral and debt based on given LTV data and asset addresses
    /// @param _ltvData Data structure containing the assets data required for LTV calculations
    /// @param _collateralAsset Address of the collateral asset
    /// @param _debtAsset Address of the debt asset
    /// @return sumOfCollateralValue Total value of collateral assets considering both protected and regular collateral
    /// assets
    /// @return debtValue Total value of debt assets
    function getPositionValues(LtvData memory _ltvData, address _collateralAsset, address _debtAsset)
        internal
        view
        returns (uint256 sumOfCollateralValue, uint256 debtValue)
    {
        uint256 sumOfCollateralAssets;
        
        sumOfCollateralAssets = _ltvData.borrowerProtectedAssets + _ltvData.borrowerCollateralAssets;

        if (sumOfCollateralAssets != 0) {
            // if no oracle is set, assume price 1, we should also not set oracle for quote token
            sumOfCollateralValue = address(_ltvData.collateralOracle) != address(0)
                ? _ltvData.collateralOracle.quote(sumOfCollateralAssets, _collateralAsset)
                : sumOfCollateralAssets;
        }

        if (_ltvData.borrowerDebtAssets != 0) {
            // if no oracle is set, assume price 1, we should also not set oracle for quote token
            debtValue = address(_ltvData.debtOracle) != address(0)
                ? _ltvData.debtOracle.quote(_ltvData.borrowerDebtAssets, _debtAsset)
                : _ltvData.borrowerDebtAssets;
        }
    }

    function ltvMath(uint256 _totalBorrowerDebtValue, uint256 _sumOfBorrowerCollateralValue)
        internal
        pure
        returns (uint256 ltvInDp)
    {
        ltvInDp = _totalBorrowerDebtValue.mulDiv(_PRECISION_DECIMALS, _sumOfBorrowerCollateralValue, Rounding.LTV);
    }
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.28;

import {Math} from "openzeppelin5/utils/math/Math.sol";
import {Rounding} from "../lib/Rounding.sol";
import {ISilo} from "../interfaces/ISilo.sol";

library SiloMathLib {
    using Math for uint256;

    uint256 internal constant _PRECISION_DECIMALS = 1e18;

    uint256 internal constant _DECIMALS_OFFSET = 3;

    /// @dev this is constant version of openzeppelin5/contracts/token/ERC20/extensions/ERC4626._decimalsOffset
    uint256 internal constant _DECIMALS_OFFSET_POW = 10 ** _DECIMALS_OFFSET;

    /// @notice Returns available liquidity to be borrowed
    /// @dev Accrued interest is entirely added to `debtAssets` but only part of it is added to `collateralAssets`. The
    ///      difference is DAO's and deployer's cut. That means DAO's and deployer's cut is not considered a borrowable
    ///      liquidity.
    function liquidity(uint256 _collateralAssets, uint256 _debtAssets) internal pure returns (uint256 liquidAssets) {
        unchecked {
            // we checked the underflow
            liquidAssets = _debtAssets > _collateralAssets ? 0 : _collateralAssets - _debtAssets;
        }
    }

    /// @notice Calculate collateral assets with accrued interest and associated fees
    /// @param _collateralAssets The total amount of collateral assets
    /// @param _debtAssets The total amount of debt assets
    /// @param _rcomp Compound interest rate for debt
    /// @param _daoFee The fee (in 18 decimals points) to be taken for the DAO
    /// @param _deployerFee The fee (in 18 decimals points) to be taken for the deployer
    /// @return collateralAssetsWithInterest The total collateral assets including the accrued interest
    /// @return debtAssetsWithInterest The debt assets with accrued interest
    /// @return daoAndDeployerRevenue Total fees amount to be split between DAO and deployer
    /// @return accruedInterest The total accrued interest
    function getCollateralAmountsWithInterest(
        uint256 _collateralAssets,
        uint256 _debtAssets,
        uint256 _rcomp,
        uint256 _daoFee,
        uint256 _deployerFee
    )
        internal
        pure
        returns (
            uint256 collateralAssetsWithInterest,
            uint256 debtAssetsWithInterest,
            uint256 daoAndDeployerRevenue,
            uint256 accruedInterest
        )
    {
        (debtAssetsWithInterest, accruedInterest) = getDebtAmountsWithInterest(_debtAssets, _rcomp);

        uint256 fees;

        // _daoFee and _deployerFee are expected to be less than 1e18, so we will not overflow
        unchecked { fees = _daoFee + _deployerFee; }

        daoAndDeployerRevenue = mulDivOverflow(accruedInterest, fees, _PRECISION_DECIMALS);

        // we will not underflow because daoAndDeployerRevenue is chunk of accruedInterest
        uint256 collateralInterest = accruedInterest - daoAndDeployerRevenue;

        uint256 cap;
        // save to uncheck because variable can not be more than max
        unchecked { cap = type(uint256).max - _collateralAssets; }

        if (cap < collateralInterest) {
            // avoid overflow on interest
            collateralInterest = cap;
        }

        // safe to uncheck because of cap
        unchecked {  collateralAssetsWithInterest = _collateralAssets + collateralInterest; }
    }

    /// @notice Calculate the debt assets with accrued interest, it should never revert with over/under flow
    /// @param _totalDebtAssets The total amount of debt assets before accrued interest
    /// @param _rcomp Compound interest rate for the debt in 18 decimal precision
    /// @return debtAssetsWithInterest The debt assets including the accrued interest
    /// @return accruedInterest The total amount of interest accrued on the debt assets
    function getDebtAmountsWithInterest(uint256 _totalDebtAssets, uint256 _rcomp)
        internal
        pure
        returns (uint256 debtAssetsWithInterest, uint256 accruedInterest)
    {
        if (_totalDebtAssets == 0 || _rcomp == 0) {
            return (_totalDebtAssets, 0);
        }

        accruedInterest = mulDivOverflow(_totalDebtAssets, _rcomp, _PRECISION_DECIMALS);

        unchecked {
            // We intentionally allow overflow here, to prevent transaction revert due to interest calculation.
            debtAssetsWithInterest = _totalDebtAssets + accruedInterest;

            // If overflow occurs, we skip accruing interest.
            if (debtAssetsWithInterest < _totalDebtAssets) {
                debtAssetsWithInterest = _totalDebtAssets;
                accruedInterest = 0;
            }
        }
    }

    /// @notice Calculates fraction between borrowed and deposited amount of tokens denominated in percentage
    /// @dev It assumes `_dp` = 100%.
    /// @param _dp decimal points used by model
    /// @param _collateralAssets current total deposits for assets
    /// @param _debtAssets current total borrows for assets
    /// @return utilization value, capped to 100%
    /// Limiting utilization ratio by 100% max will allows us to perform better interest rate computations
    /// and should not affect any other part of protocol. It is possible to go over 100% only when bad debt.
    function calculateUtilization(uint256 _dp, uint256 _collateralAssets, uint256 _debtAssets)
        internal
        pure
        returns (uint256 utilization)
    {
        if (_collateralAssets == 0 || _debtAssets == 0 || _dp == 0) return 0;

        /*
            how to prevent overflow on: _debtAssets.mulDiv(_dp, _collateralAssets, Rounding.ACCRUED_INTEREST):
            1. max > _debtAssets * _dp / _collateralAssets
            2. max / _dp > _debtAssets / _collateralAssets
        */
        if (type(uint256).max / _dp > _debtAssets / _collateralAssets) {
            utilization = _debtAssets.mulDiv(_dp, _collateralAssets, Rounding.ACCRUED_INTEREST);
            // cap at 100%
            if (utilization > _dp) utilization = _dp;
        } else {
            // we have overflow
            utilization = _dp;
        }
    }

    function convertToAssetsOrToShares(
        uint256 _assets,
        uint256 _shares,
        uint256 _totalAssets,
        uint256 _totalShares,
        Math.Rounding _roundingToAssets,
        Math.Rounding _roundingToShares,
        ISilo.AssetType _assetType
    ) internal pure returns (uint256 assets, uint256 shares) {
        if (_assets == 0) {
            require(_shares != 0, ISilo.InputZeroShares());
            shares = _shares;
            assets = convertToAssets(_shares, _totalAssets, _totalShares, _roundingToAssets, _assetType);
            require(assets != 0, ISilo.ReturnZeroAssets());
        } else if (_shares == 0) {
            shares = convertToShares(_assets, _totalAssets, _totalShares, _roundingToShares, _assetType);
            assets = _assets;
            require(shares != 0, ISilo.ReturnZeroShares());
        } else {
            revert ISilo.InputCanBeAssetsOrShares();
        }
    }

    /// @dev Math for collateral is exact copy of
    ///      openzeppelin5/contracts/token/ERC20/extensions/ERC4626._convertToShares
    function convertToShares(
        uint256 _assets,
        uint256 _totalAssets,
        uint256 _totalShares,
        Math.Rounding _rounding,
        ISilo.AssetType _assetType
    ) internal pure returns (uint256 shares) {
        (uint256 totalShares, uint256 totalAssets) = _commonConvertTo(_totalAssets, _totalShares, _assetType);

        // initially, in case of debt, if silo is empty we return shares==assets
        // for collateral, this will never be the case, because we are adding `+1` and offset in `_commonConvertTo`
        if (totalShares == 0) return _assets;

        shares = _assets.mulDiv(totalShares, totalAssets, _rounding);
    }

    /// @dev Math for collateral is exact copy of
    ///      openzeppelin5/contracts/token/ERC20/extensions/ERC4626._convertToAssets
    function convertToAssets(
        uint256 _shares,
        uint256 _totalAssets,
        uint256 _totalShares,
        Math.Rounding _rounding,
        ISilo.AssetType _assetType
    ) internal pure returns (uint256 assets) {
        (uint256 totalShares, uint256 totalAssets) = _commonConvertTo(_totalAssets, _totalShares, _assetType);

        // initially, in case of debt, if silo is empty we return shares==assets
        // for collateral, this will never be the case, because of `+1` in line above
        if (totalShares == 0) return _shares;

        assets = _shares.mulDiv(totalAssets, totalShares, _rounding);
    }

    /// @param _collateralMaxLtv maxLTV in 18 decimals that is set for debt asset
    /// @param _sumOfBorrowerCollateralValue borrower total collateral value (including protected)
    /// @param _borrowerDebtValue total value of borrower debt
    /// @return maxBorrowValue max borrow value yet available for borrower
    function calculateMaxBorrowValue(
        uint256 _collateralMaxLtv,
        uint256 _sumOfBorrowerCollateralValue,
        uint256 _borrowerDebtValue
    ) internal pure returns (uint256 maxBorrowValue) {
        if (_sumOfBorrowerCollateralValue == 0) {
            return 0;
        }

        uint256 maxDebtValue = _sumOfBorrowerCollateralValue.mulDiv(
            _collateralMaxLtv, _PRECISION_DECIMALS, Rounding.MAX_BORROW_VALUE
        );

        unchecked {
            // we will not underflow because we checking `maxDebtValue > _borrowerDebtValue`
            maxBorrowValue = maxDebtValue > _borrowerDebtValue ? maxDebtValue - _borrowerDebtValue : 0;
        }
    }

    /// @notice Calculate the maximum assets a borrower can withdraw without breaching the liquidation threshold
    /// @param _sumOfCollateralsValue The combined value of collateral and protected assets of the borrower
    /// @param _debtValue The total debt value of the borrower
    /// @param _lt The liquidation threshold in 18 decimal points
    /// @param _borrowerCollateralAssets The borrower's collateral assets before the withdrawal
    /// @param _borrowerProtectedAssets The borrower's protected assets before the withdrawal
    /// @return maxAssets The maximum assets the borrower can safely withdraw
    function calculateMaxAssetsToWithdraw(
        uint256 _sumOfCollateralsValue,
        uint256 _debtValue,
        uint256 _lt,
        uint256 _borrowerCollateralAssets,
        uint256 _borrowerProtectedAssets
    ) internal pure returns (uint256 maxAssets) {
        if (_sumOfCollateralsValue == 0) return 0;
        if (_debtValue == 0) return _sumOfCollateralsValue;
        if (_lt == 0) return 0;

        // using Rounding.LT (up) to have highest collateralValue that we have to leave for user to stay solvent
        uint256 minimumCollateralValue = _debtValue.mulDiv(_PRECISION_DECIMALS, _lt, Rounding.LTV);

        // if we over LT, we can not withdraw
        if (_sumOfCollateralsValue <= minimumCollateralValue) {
            return 0;
        }

        uint256 spareCollateralValue;
        // safe because we checked `if (_sumOfCollateralsValue <= minimumCollateralValue)`
        unchecked { spareCollateralValue = _sumOfCollateralsValue - minimumCollateralValue; }

        maxAssets = (_borrowerProtectedAssets + _borrowerCollateralAssets)
                .mulDiv(spareCollateralValue, _sumOfCollateralsValue, Rounding.MAX_WITHDRAW_TO_ASSETS);
    }

    /// @notice Determines the maximum number of assets and corresponding shares a borrower can safely withdraw
    /// @param _maxAssets The calculated limit on how many assets can be withdrawn without breaching the liquidation
    /// threshold
    /// @param _borrowerCollateralAssets Amount of collateral assets currently held by the borrower
    /// @param _borrowerProtectedAssets Amount of protected assets currently held by the borrower
    /// @param _collateralType Specifies whether the asset is of type Collateral or Protected
    /// @param _totalAssets The entire quantity of assets available in the system for withdrawal
    /// @param _assetTypeShareTokenTotalSupply Total supply of share tokens for the specified asset type
    /// @param _liquidity Current liquidity in the system for the asset type
    /// @return assets Maximum assets the borrower can withdraw
    /// @return shares Corresponding number of shares for the derived `assets` amount
    function maxWithdrawToAssetsAndShares(
        uint256 _maxAssets,
        uint256 _borrowerCollateralAssets,
        uint256 _borrowerProtectedAssets,
        ISilo.CollateralType _collateralType,
        uint256 _totalAssets,
        uint256 _assetTypeShareTokenTotalSupply,
        uint256 _liquidity
    ) internal pure returns (uint256 assets, uint256 shares) {
        if (_maxAssets == 0) return (0, 0);
        if (_assetTypeShareTokenTotalSupply == 0) return (0, 0);

        if (_collateralType == ISilo.CollateralType.Collateral) {
            assets = _maxAssets > _borrowerCollateralAssets ? _borrowerCollateralAssets : _maxAssets;

            if (assets > _liquidity) {
                assets = _liquidity;
            }
        } else {
            assets = _maxAssets > _borrowerProtectedAssets ? _borrowerProtectedAssets : _maxAssets;
        }

        shares = SiloMathLib.convertToShares(
            assets,
            _totalAssets,
            _assetTypeShareTokenTotalSupply,
            Rounding.MAX_WITHDRAW_TO_SHARES,
            ISilo.AssetType(uint256(_collateralType))
        );
    }

    /// @dev executed `_a * _b / _c`, reverts on _c == 0
    /// @return mulDivResult on overflow returns 0
    function mulDivOverflow(uint256 _a, uint256 _b, uint256 _c)
        internal
        pure
        returns (uint256 mulDivResult)
    {
        if (_a == 0) return (0);

        unchecked {
            // we have to uncheck to detect overflow
            mulDivResult = _a * _b;
            if (mulDivResult / _a != _b) return 0;

            mulDivResult /= _c;
        }
    }

    /// @dev Debt calculations should not lower the result. Debt is a liability so protocol should not take any for
    /// itself. It should return actual result and round it up.
    function _commonConvertTo(
        uint256 _totalAssets,
        uint256 _totalShares,
        ISilo.AssetType _assetType
    ) private pure returns (uint256 totalShares, uint256 totalAssets) {
        if (_totalShares == 0) {
            // silo is empty and we have dust to redistribute: this can only happen when everyone exits silo
            // this case can happen only for collateral, because for collateral we rounding in favorite of protocol
            // by resetting totalAssets, the dust that we have will go to first depositor and we starts from clean state
            _totalAssets = 0;
        }

            (totalShares, totalAssets) = _assetType == ISilo.AssetType.Debt
                ? (_totalShares, _totalAssets)
                : (_totalShares + _DECIMALS_OFFSET_POW, _totalAssets + 1);
    }

    /// @dev Calculates the fraction of a given total and percentage
    /// @param _total The total value to calculate the fraction from
    /// @param _percent The percentage to calculate the fraction from
    /// @param _currentFraction The current fraction to add to the result
    /// @return integral The integral part of the fraction
    /// @return fraction The fractional part of the fraction
    function calculateFraction(
        uint256 _total,
        uint256 _percent,
        uint64 _currentFraction
    ) internal pure returns (uint256 integral, uint64 fraction) {
        if (_total == 0) {
            return (0, _currentFraction);
        }

        unchecked {
            // safe to unchecked because: _currentFraction if never more than max uint256, div is safe
            if (type(uint256).max / _total < _percent) {
                // when overflow, reset `_currentFraction ` to zero as part of circuit breaker
                return (0, 0);
            }

            // `_total * _percent` safe to unchecked because we checked for overflow in above `if`
            // `% _PRECISION_DECIMALS` safe, because max value after modulo will be 1e18 - 1  (_PRECISION_DECIMALS - 1)
            // and this is less than 2 ** 64
            // calculate remainder for current interest
            uint256 remainder = (_total * _percent) % _PRECISION_DECIMALS;
            // integral is amount above 1e18 after adding _currentFraction and remainder
            integral = (_currentFraction + remainder) / _PRECISION_DECIMALS;
            // fraction is what we get below 1e18
            fraction = uint64((_currentFraction + remainder) % _PRECISION_DECIMALS);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.20;

import {IERC20} from "../IERC20.sol";
import {IERC1363} from "../../../interfaces/IERC1363.sol";
import {Address} from "../../../utils/Address.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC-20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using Address for address;

    /**
     * @dev An operation with an ERC-20 token failed.
     */
    error SafeERC20FailedOperation(address token);

    /**
     * @dev Indicates a failed `decreaseAllowance` request.
     */
    error SafeERC20FailedDecreaseAllowance(address spender, uint256 currentAllowance, uint256 requestedDecrease);

    /**
     * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeCall(token.transfer, (to, value)));
    }

    /**
     * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
     * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
     */
    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeCall(token.transferFrom, (from, to, value)));
    }

    /**
     * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 oldAllowance = token.allowance(address(this), spender);
        forceApprove(token, spender, oldAllowance + value);
    }

    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `requestedDecrease`. If `token` returns no
     * value, non-reverting calls are assumed to be successful.
     */
    function safeDecreaseAllowance(IERC20 token, address spender, uint256 requestedDecrease) internal {
        unchecked {
            uint256 currentAllowance = token.allowance(address(this), spender);
            if (currentAllowance < requestedDecrease) {
                revert SafeERC20FailedDecreaseAllowance(spender, currentAllowance, requestedDecrease);
            }
            forceApprove(token, spender, currentAllowance - requestedDecrease);
        }
    }

    /**
     * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval
     * to be set to zero before setting it to a non-zero value, such as USDT.
     */
    function forceApprove(IERC20 token, address spender, uint256 value) internal {
        bytes memory approvalCall = abi.encodeCall(token.approve, (spender, value));

        if (!_callOptionalReturnBool(token, approvalCall)) {
            _callOptionalReturn(token, abi.encodeCall(token.approve, (spender, 0)));
            _callOptionalReturn(token, approvalCall);
        }
    }

    /**
     * @dev Performs an {ERC1363} transferAndCall, with a fallback to the simple {ERC20} transfer if the target has no
     * code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
     * targeting contracts.
     *
     * Reverts if the returned value is other than `true`.
     */
    function transferAndCallRelaxed(IERC1363 token, address to, uint256 value, bytes memory data) internal {
        if (to.code.length == 0) {
            safeTransfer(token, to, value);
        } else if (!token.transferAndCall(to, value, data)) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Performs an {ERC1363} transferFromAndCall, with a fallback to the simple {ERC20} transferFrom if the target
     * has no code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
     * targeting contracts.
     *
     * Reverts if the returned value is other than `true`.
     */
    function transferFromAndCallRelaxed(
        IERC1363 token,
        address from,
        address to,
        uint256 value,
        bytes memory data
    ) internal {
        if (to.code.length == 0) {
            safeTransferFrom(token, from, to, value);
        } else if (!token.transferFromAndCall(from, to, value, data)) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Performs an {ERC1363} approveAndCall, with a fallback to the simple {ERC20} approve if the target has no
     * code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
     * targeting contracts.
     *
     * NOTE: When the recipient address (`to`) has no code (i.e. is an EOA), this function behaves as {forceApprove}.
     * Opposedly, when the recipient address (`to`) has code, this function only attempts to call {ERC1363-approveAndCall}
     * once without retrying, and relies on the returned value to be true.
     *
     * Reverts if the returned value is other than `true`.
     */
    function approveAndCallRelaxed(IERC1363 token, address to, uint256 value, bytes memory data) internal {
        if (to.code.length == 0) {
            forceApprove(token, to, value);
        } else if (!token.approveAndCall(to, value, data)) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data);
        if (returndata.length != 0 && !abi.decode(returndata, (bool))) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     *
     * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.
     */
    function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false
        // and not revert is the subcall reverts.

        (bool success, bytes memory returndata) = address(token).call(data);
        return success && (returndata.length == 0 || abi.decode(returndata, (bool))) && address(token).code.length > 0;
    }
}

// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.8.28;

library DistributionTypes {
    struct IncentivesProgramCreationInput {
        string name;
        address rewardToken;
        uint104 emissionPerSecond;
        uint40 distributionEnd;
    }

    struct AssetConfigInput {
        uint104 emissionPerSecond;
        uint256 totalStaked;
        address underlyingAsset;
    }

    struct UserStakeInput {
        address underlyingAsset;
        uint256 stakedByUser;
        uint256 totalStaked;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/introspection/IERC165.sol)

pragma solidity ^0.8.20;

/**
 * @dev Interface of the ERC-165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[ERC].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[ERC section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.0;

library SYUtils {
    uint256 internal constant ONE = 1e18;

    function syToAsset(uint256 exchangeRate, uint256 syAmount) internal pure returns (uint256) {
        return (syAmount * exchangeRate) / ONE;
    }

    function syToAssetUp(uint256 exchangeRate, uint256 syAmount) internal pure returns (uint256) {
        return (syAmount * exchangeRate + ONE - 1) / ONE;
    }

    function assetToSy(uint256 exchangeRate, uint256 assetAmount) internal pure returns (uint256) {
        return (assetAmount * ONE) / exchangeRate;
    }

    function assetToSyUp(uint256 exchangeRate, uint256 assetAmount) internal pure returns (uint256) {
        return (assetAmount * ONE + exchangeRate - 1) / exchangeRate;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC721/IERC721.sol)

pragma solidity ^0.8.20;

import {IERC165} from "../../utils/introspection/IERC165.sol";

/**
 * @dev Required interface of an ERC-721 compliant contract.
 */
interface IERC721 is IERC165 {
    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
     */
    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
     */
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    /**
     * @dev Returns the number of tokens in ``owner``'s account.
     */
    function balanceOf(address owner) external view returns (uint256 balance);

    /**
     * @dev Returns the owner of the `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function ownerOf(uint256 tokenId) external view returns (address owner);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon
     *   a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC-721 protocol to prevent tokens from being forever locked.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must have been allowed to move this token by either {approve} or
     *   {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon
     *   a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(address from, address to, uint256 tokenId) external;

    /**
     * @dev Transfers `tokenId` token from `from` to `to`.
     *
     * WARNING: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC-721
     * or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must
     * understand this adds an external call which potentially creates a reentrancy vulnerability.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 tokenId) external;

    /**
     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
     * The approval is cleared when the token is transferred.
     *
     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
     *
     * Requirements:
     *
     * - The caller must own the token or be an approved operator.
     * - `tokenId` must exist.
     *
     * Emits an {Approval} event.
     */
    function approve(address to, uint256 tokenId) external;

    /**
     * @dev Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the address zero.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool approved) external;

    /**
     * @dev Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address operator);

    /**
     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
     *
     * See {setApprovalForAll}
     */
    function isApprovedForAll(address owner, address operator) external view returns (bool);
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.20;

/**
 * @dev Helper library for emitting standardized panic codes.
 *
 * ```solidity
 * contract Example {
 *      using Panic for uint256;
 *
 *      // Use any of the declared internal constants
 *      function foo() { Panic.GENERIC.panic(); }
 *
 *      // Alternatively
 *      function foo() { Panic.panic(Panic.GENERIC); }
 * }
 * ```
 *
 * Follows the list from https://github.com/ethereum/solidity/blob/v0.8.24/libsolutil/ErrorCodes.h[libsolutil].
 */
// slither-disable-next-line unused-state
library Panic {
    /// @dev generic / unspecified error
    uint256 internal constant GENERIC = 0x00;
    /// @dev used by the assert() builtin
    uint256 internal constant ASSERT = 0x01;
    /// @dev arithmetic underflow or overflow
    uint256 internal constant UNDER_OVERFLOW = 0x11;
    /// @dev division or modulo by zero
    uint256 internal constant DIVISION_BY_ZERO = 0x12;
    /// @dev enum conversion error
    uint256 internal constant ENUM_CONVERSION_ERROR = 0x21;
    /// @dev invalid encoding in storage
    uint256 internal constant STORAGE_ENCODING_ERROR = 0x22;
    /// @dev empty array pop
    uint256 internal constant EMPTY_ARRAY_POP = 0x31;
    /// @dev array out of bounds access
    uint256 internal constant ARRAY_OUT_OF_BOUNDS = 0x32;
    /// @dev resource error (too large allocation or too large array)
    uint256 internal constant RESOURCE_ERROR = 0x41;
    /// @dev calling invalid internal function
    uint256 internal constant INVALID_INTERNAL_FUNCTION = 0x51;

    /// @dev Reverts with a panic code. Recommended to use with
    /// the internal constants with predefined codes.
    function panic(uint256 code) internal pure {
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x00, 0x4e487b71)
            mstore(0x20, code)
            revert(0x1c, 0x24)
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/math/SafeCast.sol)
// This file was procedurally generated from scripts/generate/templates/SafeCast.js.

pragma solidity ^0.8.20;

/**
 * @dev Wrappers over Solidity's uintXX/intXX/bool casting operators with added overflow
 * checks.
 *
 * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can
 * easily result in undesired exploitation or bugs, since developers usually
 * assume that overflows raise errors. `SafeCast` restores this intuition by
 * reverting the transaction when such an operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeCast {
    /**
     * @dev Value doesn't fit in an uint of `bits` size.
     */
    error SafeCastOverflowedUintDowncast(uint8 bits, uint256 value);

    /**
     * @dev An int value doesn't fit in an uint of `bits` size.
     */
    error SafeCastOverflowedIntToUint(int256 value);

    /**
     * @dev Value doesn't fit in an int of `bits` size.
     */
    error SafeCastOverflowedIntDowncast(uint8 bits, int256 value);

    /**
     * @dev An uint value doesn't fit in an int of `bits` size.
     */
    error SafeCastOverflowedUintToInt(uint256 value);

    /**
     * @dev Returns the downcasted uint248 from uint256, reverting on
     * overflow (when the input is greater than largest uint248).
     *
     * Counterpart to Solidity's `uint248` operator.
     *
     * Requirements:
     *
     * - input must fit into 248 bits
     */
    function toUint248(uint256 value) internal pure returns (uint248) {
        if (value > type(uint248).max) {
            revert SafeCastOverflowedUintDowncast(248, value);
        }
        return uint248(value);
    }

    /**
     * @dev Returns the downcasted uint240 from uint256, reverting on
     * overflow (when the input is greater than largest uint240).
     *
     * Counterpart to Solidity's `uint240` operator.
     *
     * Requirements:
     *
     * - input must fit into 240 bits
     */
    function toUint240(uint256 value) internal pure returns (uint240) {
        if (value > type(uint240).max) {
            revert SafeCastOverflowedUintDowncast(240, value);
        }
        return uint240(value);
    }

    /**
     * @dev Returns the downcasted uint232 from uint256, reverting on
     * overflow (when the input is greater than largest uint232).
     *
     * Counterpart to Solidity's `uint232` operator.
     *
     * Requirements:
     *
     * - input must fit into 232 bits
     */
    function toUint232(uint256 value) internal pure returns (uint232) {
        if (value > type(uint232).max) {
            revert SafeCastOverflowedUintDowncast(232, value);
        }
        return uint232(value);
    }

    /**
     * @dev Returns the downcasted uint224 from uint256, reverting on
     * overflow (when the input is greater than largest uint224).
     *
     * Counterpart to Solidity's `uint224` operator.
     *
     * Requirements:
     *
     * - input must fit into 224 bits
     */
    function toUint224(uint256 value) internal pure returns (uint224) {
        if (value > type(uint224).max) {
            revert SafeCastOverflowedUintDowncast(224, value);
        }
        return uint224(value);
    }

    /**
     * @dev Returns the downcasted uint216 from uint256, reverting on
     * overflow (when the input is greater than largest uint216).
     *
     * Counterpart to Solidity's `uint216` operator.
     *
     * Requirements:
     *
     * - input must fit into 216 bits
     */
    function toUint216(uint256 value) internal pure returns (uint216) {
        if (value > type(uint216).max) {
            revert SafeCastOverflowedUintDowncast(216, value);
        }
        return uint216(value);
    }

    /**
     * @dev Returns the downcasted uint208 from uint256, reverting on
     * overflow (when the input is greater than largest uint208).
     *
     * Counterpart to Solidity's `uint208` operator.
     *
     * Requirements:
     *
     * - input must fit into 208 bits
     */
    function toUint208(uint256 value) internal pure returns (uint208) {
        if (value > type(uint208).max) {
            revert SafeCastOverflowedUintDowncast(208, value);
        }
        return uint208(value);
    }

    /**
     * @dev Returns the downcasted uint200 from uint256, reverting on
     * overflow (when the input is greater than largest uint200).
     *
     * Counterpart to Solidity's `uint200` operator.
     *
     * Requirements:
     *
     * - input must fit into 200 bits
     */
    function toUint200(uint256 value) internal pure returns (uint200) {
        if (value > type(uint200).max) {
            revert SafeCastOverflowedUintDowncast(200, value);
        }
        return uint200(value);
    }

    /**
     * @dev Returns the downcasted uint192 from uint256, reverting on
     * overflow (when the input is greater than largest uint192).
     *
     * Counterpart to Solidity's `uint192` operator.
     *
     * Requirements:
     *
     * - input must fit into 192 bits
     */
    function toUint192(uint256 value) internal pure returns (uint192) {
        if (value > type(uint192).max) {
            revert SafeCastOverflowedUintDowncast(192, value);
        }
        return uint192(value);
    }

    /**
     * @dev Returns the downcasted uint184 from uint256, reverting on
     * overflow (when the input is greater than largest uint184).
     *
     * Counterpart to Solidity's `uint184` operator.
     *
     * Requirements:
     *
     * - input must fit into 184 bits
     */
    function toUint184(uint256 value) internal pure returns (uint184) {
        if (value > type(uint184).max) {
            revert SafeCastOverflowedUintDowncast(184, value);
        }
        return uint184(value);
    }

    /**
     * @dev Returns the downcasted uint176 from uint256, reverting on
     * overflow (when the input is greater than largest uint176).
     *
     * Counterpart to Solidity's `uint176` operator.
     *
     * Requirements:
     *
     * - input must fit into 176 bits
     */
    function toUint176(uint256 value) internal pure returns (uint176) {
        if (value > type(uint176).max) {
            revert SafeCastOverflowedUintDowncast(176, value);
        }
        return uint176(value);
    }

    /**
     * @dev Returns the downcasted uint168 from uint256, reverting on
     * overflow (when the input is greater than largest uint168).
     *
     * Counterpart to Solidity's `uint168` operator.
     *
     * Requirements:
     *
     * - input must fit into 168 bits
     */
    function toUint168(uint256 value) internal pure returns (uint168) {
        if (value > type(uint168).max) {
            revert SafeCastOverflowedUintDowncast(168, value);
        }
        return uint168(value);
    }

    /**
     * @dev Returns the downcasted uint160 from uint256, reverting on
     * overflow (when the input is greater than largest uint160).
     *
     * Counterpart to Solidity's `uint160` operator.
     *
     * Requirements:
     *
     * - input must fit into 160 bits
     */
    function toUint160(uint256 value) internal pure returns (uint160) {
        if (value > type(uint160).max) {
            revert SafeCastOverflowedUintDowncast(160, value);
        }
        return uint160(value);
    }

    /**
     * @dev Returns the downcasted uint152 from uint256, reverting on
     * overflow (when the input is greater than largest uint152).
     *
     * Counterpart to Solidity's `uint152` operator.
     *
     * Requirements:
     *
     * - input must fit into 152 bits
     */
    function toUint152(uint256 value) internal pure returns (uint152) {
        if (value > type(uint152).max) {
            revert SafeCastOverflowedUintDowncast(152, value);
        }
        return uint152(value);
    }

    /**
     * @dev Returns the downcasted uint144 from uint256, reverting on
     * overflow (when the input is greater than largest uint144).
     *
     * Counterpart to Solidity's `uint144` operator.
     *
     * Requirements:
     *
     * - input must fit into 144 bits
     */
    function toUint144(uint256 value) internal pure returns (uint144) {
        if (value > type(uint144).max) {
            revert SafeCastOverflowedUintDowncast(144, value);
        }
        return uint144(value);
    }

    /**
     * @dev Returns the downcasted uint136 from uint256, reverting on
     * overflow (when the input is greater than largest uint136).
     *
     * Counterpart to Solidity's `uint136` operator.
     *
     * Requirements:
     *
     * - input must fit into 136 bits
     */
    function toUint136(uint256 value) internal pure returns (uint136) {
        if (value > type(uint136).max) {
            revert SafeCastOverflowedUintDowncast(136, value);
        }
        return uint136(value);
    }

    /**
     * @dev Returns the downcasted uint128 from uint256, reverting on
     * overflow (when the input is greater than largest uint128).
     *
     * Counterpart to Solidity's `uint128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     */
    function toUint128(uint256 value) internal pure returns (uint128) {
        if (value > type(uint128).max) {
            revert SafeCastOverflowedUintDowncast(128, value);
        }
        return uint128(value);
    }

    /**
     * @dev Returns the downcasted uint120 from uint256, reverting on
     * overflow (when the input is greater than largest uint120).
     *
     * Counterpart to Solidity's `uint120` operator.
     *
     * Requirements:
     *
     * - input must fit into 120 bits
     */
    function toUint120(uint256 value) internal pure returns (uint120) {
        if (value > type(uint120).max) {
            revert SafeCastOverflowedUintDowncast(120, value);
        }
        return uint120(value);
    }

    /**
     * @dev Returns the downcasted uint112 from uint256, reverting on
     * overflow (when the input is greater than largest uint112).
     *
     * Counterpart to Solidity's `uint112` operator.
     *
     * Requirements:
     *
     * - input must fit into 112 bits
     */
    function toUint112(uint256 value) internal pure returns (uint112) {
        if (value > type(uint112).max) {
            revert SafeCastOverflowedUintDowncast(112, value);
        }
        return uint112(value);
    }

    /**
     * @dev Returns the downcasted uint104 from uint256, reverting on
     * overflow (when the input is greater than largest uint104).
     *
     * Counterpart to Solidity's `uint104` operator.
     *
     * Requirements:
     *
     * - input must fit into 104 bits
     */
    function toUint104(uint256 value) internal pure returns (uint104) {
        if (value > type(uint104).max) {
            revert SafeCastOverflowedUintDowncast(104, value);
        }
        return uint104(value);
    }

    /**
     * @dev Returns the downcasted uint96 from uint256, reverting on
     * overflow (when the input is greater than largest uint96).
     *
     * Counterpart to Solidity's `uint96` operator.
     *
     * Requirements:
     *
     * - input must fit into 96 bits
     */
    function toUint96(uint256 value) internal pure returns (uint96) {
        if (value > type(uint96).max) {
            revert SafeCastOverflowedUintDowncast(96, value);
        }
        return uint96(value);
    }

    /**
     * @dev Returns the downcasted uint88 from uint256, reverting on
     * overflow (when the input is greater than largest uint88).
     *
     * Counterpart to Solidity's `uint88` operator.
     *
     * Requirements:
     *
     * - input must fit into 88 bits
     */
    function toUint88(uint256 value) internal pure returns (uint88) {
        if (value > type(uint88).max) {
            revert SafeCastOverflowedUintDowncast(88, value);
        }
        return uint88(value);
    }

    /**
     * @dev Returns the downcasted uint80 from uint256, reverting on
     * overflow (when the input is greater than largest uint80).
     *
     * Counterpart to Solidity's `uint80` operator.
     *
     * Requirements:
     *
     * - input must fit into 80 bits
     */
    function toUint80(uint256 value) internal pure returns (uint80) {
        if (value > type(uint80).max) {
            revert SafeCastOverflowedUintDowncast(80, value);
        }
        return uint80(value);
    }

    /**
     * @dev Returns the downcasted uint72 from uint256, reverting on
     * overflow (when the input is greater than largest uint72).
     *
     * Counterpart to Solidity's `uint72` operator.
     *
     * Requirements:
     *
     * - input must fit into 72 bits
     */
    function toUint72(uint256 value) internal pure returns (uint72) {
        if (value > type(uint72).max) {
            revert SafeCastOverflowedUintDowncast(72, value);
        }
        return uint72(value);
    }

    /**
     * @dev Returns the downcasted uint64 from uint256, reverting on
     * overflow (when the input is greater than largest uint64).
     *
     * Counterpart to Solidity's `uint64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     */
    function toUint64(uint256 value) internal pure returns (uint64) {
        if (value > type(uint64).max) {
            revert SafeCastOverflowedUintDowncast(64, value);
        }
        return uint64(value);
    }

    /**
     * @dev Returns the downcasted uint56 from uint256, reverting on
     * overflow (when the input is greater than largest uint56).
     *
     * Counterpart to Solidity's `uint56` operator.
     *
     * Requirements:
     *
     * - input must fit into 56 bits
     */
    function toUint56(uint256 value) internal pure returns (uint56) {
        if (value > type(uint56).max) {
            revert SafeCastOverflowedUintDowncast(56, value);
        }
        return uint56(value);
    }

    /**
     * @dev Returns the downcasted uint48 from uint256, reverting on
     * overflow (when the input is greater than largest uint48).
     *
     * Counterpart to Solidity's `uint48` operator.
     *
     * Requirements:
     *
     * - input must fit into 48 bits
     */
    function toUint48(uint256 value) internal pure returns (uint48) {
        if (value > type(uint48).max) {
            revert SafeCastOverflowedUintDowncast(48, value);
        }
        return uint48(value);
    }

    /**
     * @dev Returns the downcasted uint40 from uint256, reverting on
     * overflow (when the input is greater than largest uint40).
     *
     * Counterpart to Solidity's `uint40` operator.
     *
     * Requirements:
     *
     * - input must fit into 40 bits
     */
    function toUint40(uint256 value) internal pure returns (uint40) {
        if (value > type(uint40).max) {
            revert SafeCastOverflowedUintDowncast(40, value);
        }
        return uint40(value);
    }

    /**
     * @dev Returns the downcasted uint32 from uint256, reverting on
     * overflow (when the input is greater than largest uint32).
     *
     * Counterpart to Solidity's `uint32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     */
    function toUint32(uint256 value) internal pure returns (uint32) {
        if (value > type(uint32).max) {
            revert SafeCastOverflowedUintDowncast(32, value);
        }
        return uint32(value);
    }

    /**
     * @dev Returns the downcasted uint24 from uint256, reverting on
     * overflow (when the input is greater than largest uint24).
     *
     * Counterpart to Solidity's `uint24` operator.
     *
     * Requirements:
     *
     * - input must fit into 24 bits
     */
    function toUint24(uint256 value) internal pure returns (uint24) {
        if (value > type(uint24).max) {
            revert SafeCastOverflowedUintDowncast(24, value);
        }
        return uint24(value);
    }

    /**
     * @dev Returns the downcasted uint16 from uint256, reverting on
     * overflow (when the input is greater than largest uint16).
     *
     * Counterpart to Solidity's `uint16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     */
    function toUint16(uint256 value) internal pure returns (uint16) {
        if (value > type(uint16).max) {
            revert SafeCastOverflowedUintDowncast(16, value);
        }
        return uint16(value);
    }

    /**
     * @dev Returns the downcasted uint8 from uint256, reverting on
     * overflow (when the input is greater than largest uint8).
     *
     * Counterpart to Solidity's `uint8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits
     */
    function toUint8(uint256 value) internal pure returns (uint8) {
        if (value > type(uint8).max) {
            revert SafeCastOverflowedUintDowncast(8, value);
        }
        return uint8(value);
    }

    /**
     * @dev Converts a signed int256 into an unsigned uint256.
     *
     * Requirements:
     *
     * - input must be greater than or equal to 0.
     */
    function toUint256(int256 value) internal pure returns (uint256) {
        if (value < 0) {
            revert SafeCastOverflowedIntToUint(value);
        }
        return uint256(value);
    }

    /**
     * @dev Returns the downcasted int248 from int256, reverting on
     * overflow (when the input is less than smallest int248 or
     * greater than largest int248).
     *
     * Counterpart to Solidity's `int248` operator.
     *
     * Requirements:
     *
     * - input must fit into 248 bits
     */
    function toInt248(int256 value) internal pure returns (int248 downcasted) {
        downcasted = int248(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(248, value);
        }
    }

    /**
     * @dev Returns the downcasted int240 from int256, reverting on
     * overflow (when the input is less than smallest int240 or
     * greater than largest int240).
     *
     * Counterpart to Solidity's `int240` operator.
     *
     * Requirements:
     *
     * - input must fit into 240 bits
     */
    function toInt240(int256 value) internal pure returns (int240 downcasted) {
        downcasted = int240(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(240, value);
        }
    }

    /**
     * @dev Returns the downcasted int232 from int256, reverting on
     * overflow (when the input is less than smallest int232 or
     * greater than largest int232).
     *
     * Counterpart to Solidity's `int232` operator.
     *
     * Requirements:
     *
     * - input must fit into 232 bits
     */
    function toInt232(int256 value) internal pure returns (int232 downcasted) {
        downcasted = int232(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(232, value);
        }
    }

    /**
     * @dev Returns the downcasted int224 from int256, reverting on
     * overflow (when the input is less than smallest int224 or
     * greater than largest int224).
     *
     * Counterpart to Solidity's `int224` operator.
     *
     * Requirements:
     *
     * - input must fit into 224 bits
     */
    function toInt224(int256 value) internal pure returns (int224 downcasted) {
        downcasted = int224(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(224, value);
        }
    }

    /**
     * @dev Returns the downcasted int216 from int256, reverting on
     * overflow (when the input is less than smallest int216 or
     * greater than largest int216).
     *
     * Counterpart to Solidity's `int216` operator.
     *
     * Requirements:
     *
     * - input must fit into 216 bits
     */
    function toInt216(int256 value) internal pure returns (int216 downcasted) {
        downcasted = int216(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(216, value);
        }
    }

    /**
     * @dev Returns the downcasted int208 from int256, reverting on
     * overflow (when the input is less than smallest int208 or
     * greater than largest int208).
     *
     * Counterpart to Solidity's `int208` operator.
     *
     * Requirements:
     *
     * - input must fit into 208 bits
     */
    function toInt208(int256 value) internal pure returns (int208 downcasted) {
        downcasted = int208(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(208, value);
        }
    }

    /**
     * @dev Returns the downcasted int200 from int256, reverting on
     * overflow (when the input is less than smallest int200 or
     * greater than largest int200).
     *
     * Counterpart to Solidity's `int200` operator.
     *
     * Requirements:
     *
     * - input must fit into 200 bits
     */
    function toInt200(int256 value) internal pure returns (int200 downcasted) {
        downcasted = int200(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(200, value);
        }
    }

    /**
     * @dev Returns the downcasted int192 from int256, reverting on
     * overflow (when the input is less than smallest int192 or
     * greater than largest int192).
     *
     * Counterpart to Solidity's `int192` operator.
     *
     * Requirements:
     *
     * - input must fit into 192 bits
     */
    function toInt192(int256 value) internal pure returns (int192 downcasted) {
        downcasted = int192(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(192, value);
        }
    }

    /**
     * @dev Returns the downcasted int184 from int256, reverting on
     * overflow (when the input is less than smallest int184 or
     * greater than largest int184).
     *
     * Counterpart to Solidity's `int184` operator.
     *
     * Requirements:
     *
     * - input must fit into 184 bits
     */
    function toInt184(int256 value) internal pure returns (int184 downcasted) {
        downcasted = int184(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(184, value);
        }
    }

    /**
     * @dev Returns the downcasted int176 from int256, reverting on
     * overflow (when the input is less than smallest int176 or
     * greater than largest int176).
     *
     * Counterpart to Solidity's `int176` operator.
     *
     * Requirements:
     *
     * - input must fit into 176 bits
     */
    function toInt176(int256 value) internal pure returns (int176 downcasted) {
        downcasted = int176(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(176, value);
        }
    }

    /**
     * @dev Returns the downcasted int168 from int256, reverting on
     * overflow (when the input is less than smallest int168 or
     * greater than largest int168).
     *
     * Counterpart to Solidity's `int168` operator.
     *
     * Requirements:
     *
     * - input must fit into 168 bits
     */
    function toInt168(int256 value) internal pure returns (int168 downcasted) {
        downcasted = int168(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(168, value);
        }
    }

    /**
     * @dev Returns the downcasted int160 from int256, reverting on
     * overflow (when the input is less than smallest int160 or
     * greater than largest int160).
     *
     * Counterpart to Solidity's `int160` operator.
     *
     * Requirements:
     *
     * - input must fit into 160 bits
     */
    function toInt160(int256 value) internal pure returns (int160 downcasted) {
        downcasted = int160(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(160, value);
        }
    }

    /**
     * @dev Returns the downcasted int152 from int256, reverting on
     * overflow (when the input is less than smallest int152 or
     * greater than largest int152).
     *
     * Counterpart to Solidity's `int152` operator.
     *
     * Requirements:
     *
     * - input must fit into 152 bits
     */
    function toInt152(int256 value) internal pure returns (int152 downcasted) {
        downcasted = int152(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(152, value);
        }
    }

    /**
     * @dev Returns the downcasted int144 from int256, reverting on
     * overflow (when the input is less than smallest int144 or
     * greater than largest int144).
     *
     * Counterpart to Solidity's `int144` operator.
     *
     * Requirements:
     *
     * - input must fit into 144 bits
     */
    function toInt144(int256 value) internal pure returns (int144 downcasted) {
        downcasted = int144(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(144, value);
        }
    }

    /**
     * @dev Returns the downcasted int136 from int256, reverting on
     * overflow (when the input is less than smallest int136 or
     * greater than largest int136).
     *
     * Counterpart to Solidity's `int136` operator.
     *
     * Requirements:
     *
     * - input must fit into 136 bits
     */
    function toInt136(int256 value) internal pure returns (int136 downcasted) {
        downcasted = int136(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(136, value);
        }
    }

    /**
     * @dev Returns the downcasted int128 from int256, reverting on
     * overflow (when the input is less than smallest int128 or
     * greater than largest int128).
     *
     * Counterpart to Solidity's `int128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     */
    function toInt128(int256 value) internal pure returns (int128 downcasted) {
        downcasted = int128(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(128, value);
        }
    }

    /**
     * @dev Returns the downcasted int120 from int256, reverting on
     * overflow (when the input is less than smallest int120 or
     * greater than largest int120).
     *
     * Counterpart to Solidity's `int120` operator.
     *
     * Requirements:
     *
     * - input must fit into 120 bits
     */
    function toInt120(int256 value) internal pure returns (int120 downcasted) {
        downcasted = int120(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(120, value);
        }
    }

    /**
     * @dev Returns the downcasted int112 from int256, reverting on
     * overflow (when the input is less than smallest int112 or
     * greater than largest int112).
     *
     * Counterpart to Solidity's `int112` operator.
     *
     * Requirements:
     *
     * - input must fit into 112 bits
     */
    function toInt112(int256 value) internal pure returns (int112 downcasted) {
        downcasted = int112(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(112, value);
        }
    }

    /**
     * @dev Returns the downcasted int104 from int256, reverting on
     * overflow (when the input is less than smallest int104 or
     * greater than largest int104).
     *
     * Counterpart to Solidity's `int104` operator.
     *
     * Requirements:
     *
     * - input must fit into 104 bits
     */
    function toInt104(int256 value) internal pure returns (int104 downcasted) {
        downcasted = int104(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(104, value);
        }
    }

    /**
     * @dev Returns the downcasted int96 from int256, reverting on
     * overflow (when the input is less than smallest int96 or
     * greater than largest int96).
     *
     * Counterpart to Solidity's `int96` operator.
     *
     * Requirements:
     *
     * - input must fit into 96 bits
     */
    function toInt96(int256 value) internal pure returns (int96 downcasted) {
        downcasted = int96(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(96, value);
        }
    }

    /**
     * @dev Returns the downcasted int88 from int256, reverting on
     * overflow (when the input is less than smallest int88 or
     * greater than largest int88).
     *
     * Counterpart to Solidity's `int88` operator.
     *
     * Requirements:
     *
     * - input must fit into 88 bits
     */
    function toInt88(int256 value) internal pure returns (int88 downcasted) {
        downcasted = int88(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(88, value);
        }
    }

    /**
     * @dev Returns the downcasted int80 from int256, reverting on
     * overflow (when the input is less than smallest int80 or
     * greater than largest int80).
     *
     * Counterpart to Solidity's `int80` operator.
     *
     * Requirements:
     *
     * - input must fit into 80 bits
     */
    function toInt80(int256 value) internal pure returns (int80 downcasted) {
        downcasted = int80(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(80, value);
        }
    }

    /**
     * @dev Returns the downcasted int72 from int256, reverting on
     * overflow (when the input is less than smallest int72 or
     * greater than largest int72).
     *
     * Counterpart to Solidity's `int72` operator.
     *
     * Requirements:
     *
     * - input must fit into 72 bits
     */
    function toInt72(int256 value) internal pure returns (int72 downcasted) {
        downcasted = int72(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(72, value);
        }
    }

    /**
     * @dev Returns the downcasted int64 from int256, reverting on
     * overflow (when the input is less than smallest int64 or
     * greater than largest int64).
     *
     * Counterpart to Solidity's `int64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     */
    function toInt64(int256 value) internal pure returns (int64 downcasted) {
        downcasted = int64(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(64, value);
        }
    }

    /**
     * @dev Returns the downcasted int56 from int256, reverting on
     * overflow (when the input is less than smallest int56 or
     * greater than largest int56).
     *
     * Counterpart to Solidity's `int56` operator.
     *
     * Requirements:
     *
     * - input must fit into 56 bits
     */
    function toInt56(int256 value) internal pure returns (int56 downcasted) {
        downcasted = int56(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(56, value);
        }
    }

    /**
     * @dev Returns the downcasted int48 from int256, reverting on
     * overflow (when the input is less than smallest int48 or
     * greater than largest int48).
     *
     * Counterpart to Solidity's `int48` operator.
     *
     * Requirements:
     *
     * - input must fit into 48 bits
     */
    function toInt48(int256 value) internal pure returns (int48 downcasted) {
        downcasted = int48(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(48, value);
        }
    }

    /**
     * @dev Returns the downcasted int40 from int256, reverting on
     * overflow (when the input is less than smallest int40 or
     * greater than largest int40).
     *
     * Counterpart to Solidity's `int40` operator.
     *
     * Requirements:
     *
     * - input must fit into 40 bits
     */
    function toInt40(int256 value) internal pure returns (int40 downcasted) {
        downcasted = int40(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(40, value);
        }
    }

    /**
     * @dev Returns the downcasted int32 from int256, reverting on
     * overflow (when the input is less than smallest int32 or
     * greater than largest int32).
     *
     * Counterpart to Solidity's `int32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     */
    function toInt32(int256 value) internal pure returns (int32 downcasted) {
        downcasted = int32(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(32, value);
        }
    }

    /**
     * @dev Returns the downcasted int24 from int256, reverting on
     * overflow (when the input is less than smallest int24 or
     * greater than largest int24).
     *
     * Counterpart to Solidity's `int24` operator.
     *
     * Requirements:
     *
     * - input must fit into 24 bits
     */
    function toInt24(int256 value) internal pure returns (int24 downcasted) {
        downcasted = int24(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(24, value);
        }
    }

    /**
     * @dev Returns the downcasted int16 from int256, reverting on
     * overflow (when the input is less than smallest int16 or
     * greater than largest int16).
     *
     * Counterpart to Solidity's `int16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     */
    function toInt16(int256 value) internal pure returns (int16 downcasted) {
        downcasted = int16(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(16, value);
        }
    }

    /**
     * @dev Returns the downcasted int8 from int256, reverting on
     * overflow (when the input is less than smallest int8 or
     * greater than largest int8).
     *
     * Counterpart to Solidity's `int8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits
     */
    function toInt8(int256 value) internal pure returns (int8 downcasted) {
        downcasted = int8(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(8, value);
        }
    }

    /**
     * @dev Converts an unsigned uint256 into a signed int256.
     *
     * Requirements:
     *
     * - input must be less than or equal to maxInt256.
     */
    function toInt256(uint256 value) internal pure returns (int256) {
        // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive
        if (value > uint256(type(int256).max)) {
            revert SafeCastOverflowedUintToInt(value);
        }
        return int256(value);
    }

    /**
     * @dev Cast a boolean (false or true) to a uint256 (0 or 1) with no jump.
     */
    function toUint(bool b) internal pure returns (uint256 u) {
        /// @solidity memory-safe-assembly
        assembly {
            u := iszero(iszero(b))
        }
    }
}

// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity ^0.8.28;

import {Math} from "openzeppelin5/utils/math/Math.sol";

// solhint-disable private-vars-leading-underscore
library Rounding {
    Math.Rounding internal constant UP = Math.Rounding.Ceil;
    Math.Rounding internal constant DOWN = Math.Rounding.Floor;
    Math.Rounding internal constant DEBT_TO_ASSETS = Math.Rounding.Ceil;
    // COLLATERAL_TO_ASSETS is used to calculate borrower collateral (so we want to round down)
    Math.Rounding internal constant COLLATERAL_TO_ASSETS = Math.Rounding.Floor;
    // why DEPOSIT_TO_ASSETS is Up if COLLATERAL_TO_ASSETS is Down?
    // DEPOSIT_TO_ASSETS is used for preview deposit and deposit, based on provided shares we want to pull "more" tokens
    // so we rounding up, "token flow" is in different direction than for COLLATERAL_TO_ASSETS, that's why
    // different rounding policy
    Math.Rounding internal constant DEPOSIT_TO_ASSETS = Math.Rounding.Ceil;
    Math.Rounding internal constant DEPOSIT_TO_SHARES = Math.Rounding.Floor;
    Math.Rounding internal constant BORROW_TO_ASSETS = Math.Rounding.Floor;
    Math.Rounding internal constant BORROW_TO_SHARES = Math.Rounding.Ceil;
    Math.Rounding internal constant MAX_BORROW_TO_ASSETS = Math.Rounding.Floor;
    Math.Rounding internal constant MAX_BORROW_TO_SHARES = Math.Rounding.Floor;
    Math.Rounding internal constant MAX_BORROW_VALUE = Math.Rounding.Floor;
    Math.Rounding internal constant REPAY_TO_ASSETS = Math.Rounding.Ceil;
    Math.Rounding internal constant REPAY_TO_SHARES = Math.Rounding.Floor;
    Math.Rounding internal constant MAX_REPAY_TO_ASSETS = Math.Rounding.Ceil;
    Math.Rounding internal constant WITHDRAW_TO_ASSETS = Math.Rounding.Floor;
    Math.Rounding internal constant WITHDRAW_TO_SHARES = Math.Rounding.Ceil;
    Math.Rounding internal constant MAX_WITHDRAW_TO_ASSETS = Math.Rounding.Floor;
    Math.Rounding internal constant MAX_WITHDRAW_TO_SHARES = Math.Rounding.Floor;
    Math.Rounding internal constant LIQUIDATE_TO_SHARES = Math.Rounding.Floor;
    Math.Rounding internal constant LTV = Math.Rounding.Ceil;
    Math.Rounding internal constant ACCRUED_INTEREST = Math.Rounding.Floor;
    Math.Rounding internal constant DAO_REVENUE = Math.Rounding.Ceil;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC1363.sol)

pragma solidity ^0.8.20;

import {IERC20} from "./IERC20.sol";
import {IERC165} from "./IERC165.sol";

/**
 * @title IERC1363
 * @dev Interface of the ERC-1363 standard as defined in the https://eips.ethereum.org/EIPS/eip-1363[ERC-1363].
 *
 * Defines an extension interface for ERC-20 tokens that supports executing code on a recipient contract
 * after `transfer` or `transferFrom`, or code on a spender contract after `approve`, in a single transaction.
 */
interface IERC1363 is IERC20, IERC165 {
    /*
     * Note: the ERC-165 identifier for this interface is 0xb0202a11.
     * 0xb0202a11 ===
     *   bytes4(keccak256('transferAndCall(address,uint256)')) ^
     *   bytes4(keccak256('transferAndCall(address,uint256,bytes)')) ^
     *   bytes4(keccak256('transferFromAndCall(address,address,uint256)')) ^
     *   bytes4(keccak256('transferFromAndCall(address,address,uint256,bytes)')) ^
     *   bytes4(keccak256('approveAndCall(address,uint256)')) ^
     *   bytes4(keccak256('approveAndCall(address,uint256,bytes)'))
     */

    /**
     * @dev Moves a `value` amount of tokens from the caller's account to `to`
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferAndCall(address to, uint256 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from the caller's account to `to`
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @param data Additional data with no specified format, sent in call to `to`.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferAndCall(address to, uint256 value, bytes calldata data) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the allowance mechanism
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param from The address which you want to send tokens from.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferFromAndCall(address from, address to, uint256 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the allowance mechanism
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param from The address which you want to send tokens from.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @param data Additional data with no specified format, sent in call to `to`.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferFromAndCall(address from, address to, uint256 value, bytes calldata data) external returns (bool);

    /**
     * @dev Sets a `value` amount of tokens as the allowance of `spender` over the
     * caller's tokens and then calls {IERC1363Spender-onApprovalReceived} on `spender`.
     * @param spender The address which will spend the funds.
     * @param value The amount of tokens to be spent.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function approveAndCall(address spender, uint256 value) external returns (bool);

    /**
     * @dev Sets a `value` amount of tokens as the allowance of `spender` over the
     * caller's tokens and then calls {IERC1363Spender-onApprovalReceived} on `spender`.
     * @param spender The address which will spend the funds.
     * @param value The amount of tokens to be spent.
     * @param data Additional data with no specified format, sent in call to `spender`.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function approveAndCall(address spender, uint256 value, bytes calldata data) external returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/Address.sol)

pragma solidity ^0.8.20;

import {Errors} from "./Errors.sol";

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev There's no code at `target` (it is not a contract).
     */
    error AddressEmptyCode(address target);

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.8.20/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        if (address(this).balance < amount) {
            revert Errors.InsufficientBalance(address(this).balance, amount);
        }

        (bool success, ) = recipient.call{value: amount}("");
        if (!success) {
            revert Errors.FailedCall();
        }
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason or custom error, it is bubbled
     * up by this function (like regular Solidity function calls). However, if
     * the call reverted with no returned reason, this function reverts with a
     * {Errors.FailedCall} error.
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        if (address(this).balance < value) {
            revert Errors.InsufficientBalance(address(this).balance, value);
        }
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and reverts if the target
     * was not a contract or bubbling up the revert reason (falling back to {Errors.FailedCall}) in case
     * of an unsuccessful call.
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata
    ) internal view returns (bytes memory) {
        if (!success) {
            _revert(returndata);
        } else {
            // only check if target is a contract if the call was successful and the return data is empty
            // otherwise we already know that it was a contract
            if (returndata.length == 0 && target.code.length == 0) {
                revert AddressEmptyCode(target);
            }
            return returndata;
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and reverts if it wasn't, either by bubbling the
     * revert reason or with a default {Errors.FailedCall} error.
     */
    function verifyCallResult(bool success, bytes memory returndata) internal pure returns (bytes memory) {
        if (!success) {
            _revert(returndata);
        } else {
            return returndata;
        }
    }

    /**
     * @dev Reverts with returndata if present. Otherwise reverts with {Errors.FailedCall}.
     */
    function _revert(bytes memory returndata) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert Errors.FailedCall();
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/introspection/IERC165.sol)

pragma solidity ^0.8.20;

/**
 * @dev Interface of the ERC-165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[ERC].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[ERC section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC20.sol)

pragma solidity ^0.8.20;

import {IERC20} from "../token/ERC20/IERC20.sol";

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC165.sol)

pragma solidity ^0.8.20;

import {IERC165} from "../utils/introspection/IERC165.sol";

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.20;

/**
 * @dev Collection of common custom errors used in multiple contracts
 *
 * IMPORTANT: Backwards compatibility is not guaranteed in future versions of the library.
 * It is recommended to avoid relying on the error API for critical functionality.
 */
library Errors {
    /**
     * @dev The ETH balance of the account is not enough to perform the operation.
     */
    error InsufficientBalance(uint256 balance, uint256 needed);

    /**
     * @dev A call to an address target failed. The target may have reverted.
     */
    error FailedCall();

    /**
     * @dev The deployment failed.
     */
    error FailedDeployment();
}

{
  "remappings": [
    "forge-std/=lib/forge-std/src/",
    "@openzeppelin/contracts-upgradeable/=node_modules/@openzeppelin/contracts-upgradeable/",
    "@openzeppelin/contracts/=lib/openzeppelin-contracts/contracts/",
    "@tokenized-strategy/=lib/tokenized-strategy/src/",
    "@periphery/=lib/tokenized-strategy-periphery/src/",
    "@pendle/core-v2/=node_modules/@pendle/core-v2/",
    "@balancer-v3-monorepo/interfaces/=lib/balancer-v3-monorepo/pkg/interfaces/contracts/",
    "@balancer-v3-monorepo/vault/=lib/balancer-v3-monorepo/pkg/vault/contracts/",
    "@permit2/=lib/permit2/src/",
    "silo-core/=lib/silo-contracts-v2/silo-core/",
    "@uniswap/v3-core/=lib/silo-contracts-v2/gitmodules/uniswap/v3-core/",
    "@yearn-vaults/=lib/tokenized-strategy-periphery/lib/yearn-vaults-v3/contracts/",
    "ERC4626/=lib/silo-contracts-v2/gitmodules/crytic/properties/lib/ERC4626/contracts/",
    "a16z-erc4626-tests/=lib/silo-contracts-v2/gitmodules/a16z-erc4626-tests/",
    "balancer-labs/v2-interfaces/=lib/silo-contracts-v2/external/balancer-v2-monorepo/pkg/interfaces/contracts/",
    "balancer-labs/v2-liquidity-mining/=lib/silo-contracts-v2/external/balancer-v2-monorepo/pkg/liquidity-mining/contracts/",
    "balancer-labs/v2-solidity-utils/=lib/silo-contracts-v2/external/balancer-v2-monorepo/pkg/solidity-utils/contracts/",
    "balancer-v3-monorepo/=lib/balancer-v3-monorepo/",
    "chainlink-ccip/=lib/silo-contracts-v2/gitmodules/chainlink-ccip/contracts/src/",
    "chainlink/=lib/silo-contracts-v2/gitmodules/chainlink/contracts/src/",
    "createx/=lib/silo-contracts-v2/gitmodules/pyth-sdk-solidity/lazer/contracts/evm/lib/createx/src/",
    "crytic/=lib/silo-contracts-v2/gitmodules/crytic/",
    "ds-test/=lib/forge-std/lib/ds-test/src/",
    "erc4626-tests/=lib/tokenized-strategy/lib/erc4626-tests/",
    "forge-gas-snapshot/=lib/permit2/lib/forge-gas-snapshot/src/",
    "halmos-cheatcodes/=lib/openzeppelin-contracts/lib/halmos-cheatcodes/src/",
    "morpho-blue/=lib/silo-contracts-v2/gitmodules/morpho-blue/src/",
    "openzeppelin-contracts-5/=lib/silo-contracts-v2/gitmodules/openzeppelin-contracts-5/",
    "openzeppelin-contracts-upgradeable-5/=lib/silo-contracts-v2/gitmodules/openzeppelin-contracts-upgradeable-5/",
    "openzeppelin-contracts-upgradeable/=lib/silo-contracts-v2/gitmodules/pyth-sdk-solidity/lazer/contracts/evm/lib/openzeppelin-contracts-upgradeable/",
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    "openzeppelin5-upgradeable/=lib/silo-contracts-v2/gitmodules/openzeppelin-contracts-upgradeable-5/contracts/",
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    "pyth-sdk-solidity/=lib/silo-contracts-v2/gitmodules/pyth-sdk-solidity/target_chains/ethereum/sdk/solidity/",
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    "ve-silo/=lib/silo-contracts-v2/ve-silo/",
    "yearn-vaults-v3/=lib/tokenized-strategy-periphery/lib/yearn-vaults-v3/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "ipfs",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
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        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "cancun",
  "viaIR": false
}

• No Contract Security Audit Submitted- Submit Audit Here

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Mutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_depositLimit","type":"uint256"}],"name":"setDepositLimit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_maxSlippageBps","type":"uint256"}],"name":"setMaxSlippageBps","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_swapper","type":"address"}],"name":"setSwapper","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"setSwapperApprovals","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_targetLtv","type":"uint256"}],"name":"setTargetLtv","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint32","name":"_twapDuration","type":"uint32"}],"name":"setTwapDuration","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_withdrawLimit","type":"uint256"}],"name":"setWithdrawLimit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"shutdownWithdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_totalIdle","type":"uint256"}],"name":"tendThis","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"tendTrigger","outputs":[{"internalType":"bool","name":"","type":"bool"},{"internalType":"bytes","name":"","type":"bytes"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"tokenizedStrategyAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"withdrawLimit","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"}]

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

-----Decoded View---------------
Arg [0] : _asset (address): 0xc7990369DA608C2F4903715E3bD22f2970536C29
Arg [1] : _name (string): Ceres smsUSD Leveraged Strategy
Arg [2] : _ceresSwapper (address): 0x2C13bB26CbF37381A0B816F30de33bd70fD7C430
Arg [3] : _pendleMarket (address): 0x4aEe8d5e242c2485bd124299203C7Fa5108C25Fc
Arg [4] : _siloMarketConfig (address): 0xCB2dcdC5E4016d0BE706df5e312Fb3E7c2341497
Arg [5] : isCollateralProtected (bool): True

-----Encoded View---------------
8 Constructor Arguments found :
Arg [0] : 000000000000000000000000c7990369da608c2f4903715e3bd22f2970536c29
Arg [1] : 00000000000000000000000000000000000000000000000000000000000000c0
Arg [2] : 0000000000000000000000002c13bb26cbf37381a0b816f30de33bd70fd7c430
Arg [3] : 0000000000000000000000004aee8d5e242c2485bd124299203c7fa5108c25fc
Arg [4] : 000000000000000000000000cb2dcdc5e4016d0be706df5e312fb3e7c2341497
Arg [5] : 0000000000000000000000000000000000000000000000000000000000000001
Arg [6] : 000000000000000000000000000000000000000000000000000000000000001f
Arg [7] : 436572657320736d73555344204c657665726167656420537472617465677900