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// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity 0.8.28;

import {Ownable2Step, Ownable} from "openzeppelin5/access/Ownable2Step.sol";
import {Initializable} from "openzeppelin5/proxy/utils/Initializable.sol";

import {IShareToken} from "silo-core/contracts/interfaces/IShareToken.sol";
import {ISiloConfig} from "silo-core/contracts/interfaces/ISiloConfig.sol";
import {Hook} from "silo-core/contracts/lib/Hook.sol";
import {PartialLiquidation} from "../liquidation/PartialLiquidation.sol";
import {IGaugeLike as IGauge} from "../../../interfaces/IGaugeLike.sol";
import {IGaugeHookReceiver, IHookReceiver} from "../../../interfaces/IGaugeHookReceiver.sol";
import {SiloHookReceiver} from "../_common/SiloHookReceiver.sol";

/// @notice Silo share token hook receiver for the gauge.
/// It notifies the gauge (if configured) about any balance update in the Silo share token.
contract GaugeHookReceiver is PartialLiquidation, IGaugeHookReceiver, SiloHookReceiver, Ownable2Step, Initializable {
    using Hook for uint256;
    using Hook for bytes;

    uint24 internal constant _HOOKS_BEFORE_NOT_CONFIGURED = 0;

    IGauge public gauge;
    IShareToken public shareToken;

    mapping(IShareToken => IGauge) public configuredGauges;

    constructor() Ownable(msg.sender) {
        _disableInitializers();
        _transferOwnership(address(0));
    }

    /// @inheritdoc IHookReceiver
    function initialize(ISiloConfig _siloConfig, bytes calldata _data)
        external
        virtual
        initializer
        override(IHookReceiver, PartialLiquidation)
    {
        (address owner) = abi.decode(_data, (address));

        require(owner != address(0), OwnerIsZeroAddress());

        _initialize(_siloConfig);
        _transferOwnership(owner);
    }

    /// @inheritdoc IGaugeHookReceiver
    function setGauge(IGauge _gauge, IShareToken _shareToken) external virtual onlyOwner {
        require(address(_gauge) != address(0), EmptyGaugeAddress());
        require(_gauge.share_token() == address(_shareToken), WrongGaugeShareToken());

        address configuredGauge = address(configuredGauges[_shareToken]);

        require(configuredGauge == address(0), GaugeAlreadyConfigured());

        address silo = address(_shareToken.silo());

        uint256 tokenType = _getTokenType(silo, address(_shareToken));
        uint256 hooksAfter = _getHooksAfter(silo);

        uint256 action = tokenType | Hook.SHARE_TOKEN_TRANSFER;
        hooksAfter = hooksAfter.addAction(action);

        _setHookConfig(silo, _HOOKS_BEFORE_NOT_CONFIGURED, hooksAfter);

        configuredGauges[_shareToken] = _gauge;

        emit GaugeConfigured(address(gauge), address(_shareToken));
    }

    /// @inheritdoc IGaugeHookReceiver
    function removeGauge(IShareToken _shareToken) external virtual onlyOwner {
        IGauge configuredGauge = configuredGauges[_shareToken];

        require(address(configuredGauge) != address(0), GaugeIsNotConfigured());
        require(configuredGauge.is_killed(), CantRemoveActiveGauge());

        address silo = address(_shareToken.silo());
        
        uint256 tokenType = _getTokenType(silo, address(_shareToken));
        uint256 hooksAfter = _getHooksAfter(silo);

        hooksAfter = hooksAfter.removeAction(tokenType);

        _setHookConfig(silo, _HOOKS_BEFORE_NOT_CONFIGURED, hooksAfter);

        delete configuredGauges[_shareToken];

        emit GaugeRemoved(address(_shareToken));
    }

    /// @inheritdoc IHookReceiver
    function beforeAction(address, uint256, bytes calldata)
        external
        virtual
        override(IHookReceiver, PartialLiquidation)
    {
        // Do not expect any actions.
        revert RequestNotSupported();
    }

    /// @inheritdoc IHookReceiver
    function afterAction(address _silo, uint256 _action, bytes calldata _inputAndOutput)
        external
        virtual
        override(IHookReceiver, PartialLiquidation)
    {
        IGauge theGauge = configuredGauges[IShareToken(msg.sender)];

        require(theGauge != IGauge(address(0)), GaugeIsNotConfigured());

        if (theGauge.is_killed()) return; // Do not revert if gauge is killed. Ignore the action.
        if (!_getHooksAfter(_silo).matchAction(_action)) return; // Should not happen, but just in case

        Hook.AfterTokenTransfer memory input = _inputAndOutput.afterTokenTransferDecode();

        theGauge.afterTokenTransfer(
            input.sender,
            input.senderBalance,
            input.recipient,
            input.recipientBalance,
            input.totalSupply,
            input.amount
        );
    }

    function hookReceiverConfig(address _silo)
        external
        view
        virtual
        override(PartialLiquidation, IHookReceiver)
        returns (uint24 hooksBefore, uint24 hooksAfter)
    {
        return _hookReceiverConfig(_silo);
    }

    /// @notice Get the token type for the share token
    /// @param _silo Silo address for which tokens was deployed
    /// @param _shareToken Share token address
    /// @dev Revert if wrong silo
    /// @dev Revert if the share token is not one of the collateral, protected or debt tokens
    function _getTokenType(address _silo, address _shareToken) internal view virtual returns (uint256) {
        (
            address protectedShareToken,
            address collateralShareToken,
            address debtShareToken
        ) = siloConfig.getShareTokens(_silo);

        if (_shareToken == collateralShareToken) return Hook.COLLATERAL_TOKEN;
        if (_shareToken == protectedShareToken) return Hook.PROTECTED_TOKEN;
        if (_shareToken == debtShareToken) return Hook.DEBT_TOKEN;

        revert InvalidShareToken();
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable2Step.sol)

pragma solidity ^0.8.20;

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

/**
 * @dev Contract module which provides access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * This extension of the {Ownable} contract includes a two-step mechanism to transfer
 * ownership, where the new owner must call {acceptOwnership} in order to replace the
 * old one. This can help prevent common mistakes, such as transfers of ownership to
 * incorrect accounts, or to contracts that are unable to interact with the
 * permission system.
 *
 * The initial owner is specified at deployment time in the constructor for `Ownable`. This
 * can later be changed with {transferOwnership} and {acceptOwnership}.
 *
 * This module is used through inheritance. It will make available all functions
 * from parent (Ownable).
 */
abstract contract Ownable2Step is Ownable {
    address private _pendingOwner;

    event OwnershipTransferStarted(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Returns the address of the pending owner.
     */
    function pendingOwner() public view virtual returns (address) {
        return _pendingOwner;
    }

    /**
     * @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one.
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual override onlyOwner {
        _pendingOwner = newOwner;
        emit OwnershipTransferStarted(owner(), newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner.
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual override {
        delete _pendingOwner;
        super._transferOwnership(newOwner);
    }

    /**
     * @dev The new owner accepts the ownership transfer.
     */
    function acceptOwnership() public virtual {
        address sender = _msgSender();
        if (pendingOwner() != sender) {
            revert OwnableUnauthorizedAccount(sender);
        }
        _transferOwnership(sender);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (proxy/utils/Initializable.sol)

pragma solidity ^0.8.20;

/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be
 * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in
 * case an upgrade adds a module that needs to be initialized.
 *
 * For example:
 *
 * [.hljs-theme-light.nopadding]
 * ```solidity
 * contract MyToken is ERC20Upgradeable {
 *     function initialize() initializer public {
 *         __ERC20_init("MyToken", "MTK");
 *     }
 * }
 *
 * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
 *     function initializeV2() reinitializer(2) public {
 *         __ERC20Permit_init("MyToken");
 *     }
 * }
 * ```
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke
 * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * /// @custom:oz-upgrades-unsafe-allow constructor
 * constructor() {
 *     _disableInitializers();
 * }
 * ```
 * ====
 */
abstract contract Initializable {
    /**
     * @dev Storage of the initializable contract.
     *
     * It's implemented on a custom ERC-7201 namespace to reduce the risk of storage collisions
     * when using with upgradeable contracts.
     *
     * @custom:storage-location erc7201:openzeppelin.storage.Initializable
     */
    struct InitializableStorage {
        /**
         * @dev Indicates that the contract has been initialized.
         */
        uint64 _initialized;
        /**
         * @dev Indicates that the contract is in the process of being initialized.
         */
        bool _initializing;
    }

    // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.Initializable")) - 1)) & ~bytes32(uint256(0xff))
    bytes32 private constant INITIALIZABLE_STORAGE = 0xf0c57e16840df040f15088dc2f81fe391c3923bec73e23a9662efc9c229c6a00;

    /**
     * @dev The contract is already initialized.
     */
    error InvalidInitialization();

    /**
     * @dev The contract is not initializing.
     */
    error NotInitializing();

    /**
     * @dev Triggered when the contract has been initialized or reinitialized.
     */
    event Initialized(uint64 version);

    /**
     * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,
     * `onlyInitializing` functions can be used to initialize parent contracts.
     *
     * Similar to `reinitializer(1)`, except that in the context of a constructor an `initializer` may be invoked any
     * number of times. This behavior in the constructor can be useful during testing and is not expected to be used in
     * production.
     *
     * Emits an {Initialized} event.
     */
    modifier initializer() {
        // solhint-disable-next-line var-name-mixedcase
        InitializableStorage storage $ = _getInitializableStorage();

        // Cache values to avoid duplicated sloads
        bool isTopLevelCall = !$._initializing;
        uint64 initialized = $._initialized;

        // Allowed calls:
        // - initialSetup: the contract is not in the initializing state and no previous version was
        //                 initialized
        // - construction: the contract is initialized at version 1 (no reininitialization) and the
        //                 current contract is just being deployed
        bool initialSetup = initialized == 0 && isTopLevelCall;
        bool construction = initialized == 1 && address(this).code.length == 0;

        if (!initialSetup && !construction) {
            revert InvalidInitialization();
        }
        $._initialized = 1;
        if (isTopLevelCall) {
            $._initializing = true;
        }
        _;
        if (isTopLevelCall) {
            $._initializing = false;
            emit Initialized(1);
        }
    }

    /**
     * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the
     * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be
     * used to initialize parent contracts.
     *
     * A reinitializer may be used after the original initialization step. This is essential to configure modules that
     * are added through upgrades and that require initialization.
     *
     * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`
     * cannot be nested. If one is invoked in the context of another, execution will revert.
     *
     * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in
     * a contract, executing them in the right order is up to the developer or operator.
     *
     * WARNING: Setting the version to 2**64 - 1 will prevent any future reinitialization.
     *
     * Emits an {Initialized} event.
     */
    modifier reinitializer(uint64 version) {
        // solhint-disable-next-line var-name-mixedcase
        InitializableStorage storage $ = _getInitializableStorage();

        if ($._initializing || $._initialized >= version) {
            revert InvalidInitialization();
        }
        $._initialized = version;
        $._initializing = true;
        _;
        $._initializing = false;
        emit Initialized(version);
    }

    /**
     * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
     * {initializer} and {reinitializer} modifiers, directly or indirectly.
     */
    modifier onlyInitializing() {
        _checkInitializing();
        _;
    }

    /**
     * @dev Reverts if the contract is not in an initializing state. See {onlyInitializing}.
     */
    function _checkInitializing() internal view virtual {
        if (!_isInitializing()) {
            revert NotInitializing();
        }
    }

    /**
     * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.
     * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized
     * to any version. It is recommended to use this to lock implementation contracts that are designed to be called
     * through proxies.
     *
     * Emits an {Initialized} event the first time it is successfully executed.
     */
    function _disableInitializers() internal virtual {
        // solhint-disable-next-line var-name-mixedcase
        InitializableStorage storage $ = _getInitializableStorage();

        if ($._initializing) {
            revert InvalidInitialization();
        }
        if ($._initialized != type(uint64).max) {
            $._initialized = type(uint64).max;
            emit Initialized(type(uint64).max);
        }
    }

    /**
     * @dev Returns the highest version that has been initialized. See {reinitializer}.
     */
    function _getInitializedVersion() internal view returns (uint64) {
        return _getInitializableStorage()._initialized;
    }

    /**
     * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.
     */
    function _isInitializing() internal view returns (bool) {
        return _getInitializableStorage()._initializing;
    }

    /**
     * @dev Returns a pointer to the storage namespace.
     */
    // solhint-disable-next-line var-name-mixedcase
    function _getInitializableStorage() private pure returns (InitializableStorage storage $) {
        assembly {
            $.slot := INITIALIZABLE_STORAGE
        }
    }
}

// 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;

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
    function setThisSiloAsCollateralSilo(address _borrower) external;

    /// @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
    function setOtherSiloAsCollateralSilo(address _borrower) external;

    /// @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: GPL-2.0-or-later
pragma solidity ^0.8.28;

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

// solhint-disable private-vars-leading-underscore
library Hook {
    /// @notice The data structure for the deposit hook
    /// @param assets The amount of assets deposited
    /// @param shares The amount of shares deposited
    /// @param receiver The receiver of the deposit
    struct BeforeDepositInput {
        uint256 assets;
        uint256 shares;
        address receiver;
    }

    /// @notice The data structure for the deposit hook
    /// @param assets The amount of assets deposited
    /// @param shares The amount of shares deposited
    /// @param receiver The receiver of the deposit
    /// @param receivedAssets The exact amount of assets being deposited
    /// @param mintedShares The exact amount of shares being minted
    struct AfterDepositInput {
        uint256 assets;
        uint256 shares;
        address receiver;
        uint256 receivedAssets;
        uint256 mintedShares;
    }

    /// @notice The data structure for the withdraw hook
    /// @param assets The amount of assets withdrawn
    /// @param shares The amount of shares withdrawn
    /// @param receiver The receiver of the withdrawal
    /// @param owner The owner of the shares
    /// @param spender The spender of the shares
    struct BeforeWithdrawInput {
        uint256 assets;
        uint256 shares;
        address receiver;
        address owner;
        address spender;
    }

    /// @notice The data structure for the withdraw hook
    /// @param assets The amount of assets withdrawn
    /// @param shares The amount of shares withdrawn
    /// @param receiver The receiver of the withdrawal
    /// @param owner The owner of the shares
    /// @param spender The spender of the shares
    /// @param withdrawnAssets The exact amount of assets being withdrawn
    /// @param withdrawnShares The exact amount of shares being withdrawn
    struct AfterWithdrawInput {
        uint256 assets;
        uint256 shares;
        address receiver;
        address owner;
        address spender;
        uint256 withdrawnAssets;
        uint256 withdrawnShares;
    }

    /// @notice The data structure for the share token transfer hook
    /// @param sender The sender of the transfer (address(0) on mint)
    /// @param recipient The recipient of the transfer (address(0) on burn)
    /// @param amount The amount of tokens transferred/minted/burned
    /// @param senderBalance The balance of the sender after the transfer (empty on mint)
    /// @param recipientBalance The balance of the recipient after the transfer (empty on burn)
    /// @param totalSupply The total supply of the share token
    struct AfterTokenTransfer {
        address sender;
        address recipient;
        uint256 amount;
        uint256 senderBalance;
        uint256 recipientBalance;
        uint256 totalSupply;
    }

    /// @notice The data structure for the before borrow hook
    /// @param assets The amount of assets to borrow
    /// @param shares The amount of shares to borrow
    /// @param receiver The receiver of the borrow
    /// @param borrower The borrower of the assets
    /// @param _spender Address which initiates the borrowing action on behalf of the borrower
    struct BeforeBorrowInput {
        uint256 assets;
        uint256 shares;
        address receiver;
        address borrower;
        address spender;
    }

    /// @notice The data structure for the after borrow hook
    /// @param assets The amount of assets borrowed
    /// @param shares The amount of shares borrowed
    /// @param receiver The receiver of the borrow
    /// @param borrower The borrower of the assets
    /// @param spender Address which initiates the borrowing action on behalf of the borrower
    /// @param borrowedAssets The exact amount of assets being borrowed
    /// @param borrowedShares The exact amount of shares being borrowed
    struct AfterBorrowInput {
        uint256 assets;
        uint256 shares;
        address receiver;
        address borrower;
        address spender;
        uint256 borrowedAssets;
        uint256 borrowedShares;
    }

    /// @notice The data structure for the before repay hook
    /// @param assets The amount of assets to repay
    /// @param shares The amount of shares to repay
    /// @param borrower The borrower of the assets
    /// @param repayer The repayer of the assets
    struct BeforeRepayInput {
        uint256 assets;
        uint256 shares;
        address borrower;
        address repayer;
    }

    /// @notice The data structure for the after repay hook
    /// @param assets The amount of assets to repay
    /// @param shares The amount of shares to repay
    /// @param borrower The borrower of the assets
    /// @param repayer The repayer of the assets
    /// @param repaidAssets The exact amount of assets being repaid
    /// @param repaidShares The exact amount of shares being repaid
    struct AfterRepayInput {
        uint256 assets;
        uint256 shares;
        address borrower;
        address repayer;
        uint256 repaidAssets;
        uint256 repaidShares;
    }

    /// @notice The data structure for the before flash loan hook
    /// @param receiver The flash loan receiver
    /// @param token The flash loan token
    /// @param amount Requested amount of tokens
    struct BeforeFlashLoanInput {
        address receiver;
        address token;
        uint256 amount;
    }

    /// @notice The data structure for the after flash loan hook
    /// @param receiver The flash loan receiver
    /// @param token The flash loan token
    /// @param amount Received amount of tokens
    /// @param fee The flash loan fee
    struct AfterFlashLoanInput {
        address receiver;
        address token;
        uint256 amount;
        uint256 fee;
    }

    /// @notice The data structure for the before transition collateral hook
    /// @param shares The amount of shares to transition
    struct BeforeTransitionCollateralInput {
        uint256 shares;
        address owner;
    }

    /// @notice The data structure for the after transition collateral hook
    /// @param shares The amount of shares to transition
    struct AfterTransitionCollateralInput {
        uint256 shares;
        address owner;
        uint256 assets;
    }

    /// @notice The data structure for the switch collateral hook
    /// @param user The user switching collateral
    struct SwitchCollateralInput {
        address user;
    }

    /// @notice Supported hooks
    /// @dev The hooks are stored as a bitmap and can be combined with bitwise OR
    uint256 internal constant NONE = 0;
    uint256 internal constant DEPOSIT = 2 ** 1;
    uint256 internal constant BORROW = 2 ** 2;
    uint256 internal constant BORROW_SAME_ASSET = 2 ** 3;
    uint256 internal constant REPAY = 2 ** 4;
    uint256 internal constant WITHDRAW = 2 ** 5;
    uint256 internal constant FLASH_LOAN = 2 ** 6;
    uint256 internal constant TRANSITION_COLLATERAL = 2 ** 7;
    uint256 internal constant SWITCH_COLLATERAL = 2 ** 8;
    uint256 internal constant LIQUIDATION = 2 ** 9;
    uint256 internal constant SHARE_TOKEN_TRANSFER = 2 ** 10;
    uint256 internal constant COLLATERAL_TOKEN = 2 ** 11;
    uint256 internal constant PROTECTED_TOKEN = 2 ** 12;
    uint256 internal constant DEBT_TOKEN = 2 ** 13;

    // note: currently we can support hook value up to 2 ** 23,
    // because for optimisation purposes, we storing hooks as uint24

    // For decoding packed data
    uint256 private constant PACKED_ADDRESS_LENGTH = 20;
    uint256 private constant PACKED_FULL_LENGTH = 32;
    uint256 private constant PACKED_ENUM_LENGTH = 1;
    uint256 private constant PACKED_BOOL_LENGTH = 1;

    error FailedToParseBoolean();

    /// @notice Checks if the action has a specific hook
    /// @param _action The action
    /// @param _expectedHook The expected hook
    /// @dev The function returns true if the action has the expected hook.
    /// As hooks actions can be combined with bitwise OR, the following examples are valid:
    /// `matchAction(WITHDRAW | COLLATERAL_TOKEN, WITHDRAW) == true`
    /// `matchAction(WITHDRAW | COLLATERAL_TOKEN, COLLATERAL_TOKEN) == true`
    /// `matchAction(WITHDRAW | COLLATERAL_TOKEN, WITHDRAW | COLLATERAL_TOKEN) == true`
    function matchAction(uint256 _action, uint256 _expectedHook) internal pure returns (bool) {
        return _action & _expectedHook == _expectedHook;
    }

    /// @notice Adds a hook to an action
    /// @param _action The action
    /// @param _newAction The new hook to be added
    function addAction(uint256 _action, uint256 _newAction) internal pure returns (uint256) {
        return _action | _newAction;
    }

    /// @dev please be careful with removing actions, because other hooks might using them
    /// eg when you have `_action = COLLATERAL_TOKEN | PROTECTED_TOKEN | SHARE_TOKEN_TRANSFER`
    /// and you want to remove action on protected token transfer by doing
    /// `remove(_action, PROTECTED_TOKEN | SHARE_TOKEN_TRANSFER)`, the result will be `_action=COLLATERAL_TOKEN`
    /// and it will not trigger collateral token transfer. In this example you should do:
    /// `remove(_action, PROTECTED_TOKEN)`
    function removeAction(uint256 _action, uint256 _actionToRemove) internal pure returns (uint256) {
        return _action & (~_actionToRemove);
    }

    /// @notice Returns the action for depositing a specific collateral type
    /// @param _type The collateral type
    function depositAction(ISilo.CollateralType _type) internal pure returns (uint256) {
        return DEPOSIT | (_type == ISilo.CollateralType.Collateral ? COLLATERAL_TOKEN : PROTECTED_TOKEN);
    }

    /// @notice Returns the action for withdrawing a specific collateral type
    /// @param _type The collateral type
    function withdrawAction(ISilo.CollateralType _type) internal pure returns (uint256) {
        return WITHDRAW | (_type == ISilo.CollateralType.Collateral ? COLLATERAL_TOKEN : PROTECTED_TOKEN);
    }

    /// @notice Returns the action for collateral transition
    /// @param _type The collateral type
    function transitionCollateralAction(ISilo.CollateralType _type) internal pure returns (uint256) {
        return TRANSITION_COLLATERAL | (_type == ISilo.CollateralType.Collateral ? COLLATERAL_TOKEN : PROTECTED_TOKEN);
    }

    /// @notice Returns the share token transfer action
    /// @param _tokenType The token type (COLLATERAL_TOKEN || PROTECTED_TOKEN || DEBT_TOKEN)
    function shareTokenTransfer(uint256 _tokenType) internal pure returns (uint256) {
        return SHARE_TOKEN_TRANSFER | _tokenType;
    }

    /// @dev Decodes packed data from the share token after the transfer hook
    /// @param packed The packed data (via abi.encodePacked)
    /// @return input decoded
    function afterTokenTransferDecode(bytes memory packed)
        internal
        pure
        returns (AfterTokenTransfer memory input)
    {
        address sender;
        address recipient;
        uint256 amount;
        uint256 senderBalance;
        uint256 recipientBalance;
        uint256 totalSupply;

        assembly { // solhint-disable-line no-inline-assembly
            let pointer := PACKED_ADDRESS_LENGTH
            sender := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_ADDRESS_LENGTH)
            recipient := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_FULL_LENGTH)
            amount := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_FULL_LENGTH)
            senderBalance := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_FULL_LENGTH)
            recipientBalance := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_FULL_LENGTH)
            totalSupply := mload(add(packed, pointer))
        }

        input = AfterTokenTransfer(sender, recipient, amount, senderBalance, recipientBalance, totalSupply);
    }

    /// @dev Decodes packed data from the deposit hook
    /// @param packed The packed data (via abi.encodePacked)
    /// @return input decoded
    function beforeDepositDecode(bytes memory packed)
        internal
        pure
        returns (BeforeDepositInput memory input)
    {
        uint256 assets;
        uint256 shares;
        address receiver;

        assembly { // solhint-disable-line no-inline-assembly
            let pointer := PACKED_FULL_LENGTH
            assets := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_FULL_LENGTH)
            shares := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_ADDRESS_LENGTH)
            receiver := mload(add(packed, pointer))
        }

        input = BeforeDepositInput(assets, shares, receiver);
    }

    /// @dev Decodes packed data from the deposit hook
    /// @param packed The packed data (via abi.encodePacked)
    /// @return input decoded
    function afterDepositDecode(bytes memory packed)
        internal
        pure
        returns (AfterDepositInput memory input)
    {
        uint256 assets;
        uint256 shares;
        address receiver;
        uint256 receivedAssets;
        uint256 mintedShares;

        assembly { // solhint-disable-line no-inline-assembly
            let pointer := PACKED_FULL_LENGTH
            assets := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_FULL_LENGTH)
            shares := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_ADDRESS_LENGTH)
            receiver := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_FULL_LENGTH)
            receivedAssets := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_FULL_LENGTH)
            mintedShares := mload(add(packed, pointer))
        }

        input = AfterDepositInput(assets, shares, receiver, receivedAssets, mintedShares);
    }

    /// @dev Decodes packed data from the withdraw hook
    /// @param packed The packed data (via abi.encodePacked)
    /// @return input decoded
    function beforeWithdrawDecode(bytes memory packed)
        internal
        pure
        returns (BeforeWithdrawInput memory input)
    {
        uint256 assets;
        uint256 shares;
        address receiver;
        address owner;
        address spender;

        assembly { // solhint-disable-line no-inline-assembly
            let pointer := PACKED_FULL_LENGTH
            assets := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_FULL_LENGTH)
            shares := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_ADDRESS_LENGTH)
            receiver := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_ADDRESS_LENGTH)
            owner := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_ADDRESS_LENGTH)
            spender := mload(add(packed, pointer))
        }

        input = BeforeWithdrawInput(assets, shares, receiver, owner, spender);
    }

    /// @dev Decodes packed data from the withdraw hook
    /// @param packed The packed data (via abi.encodePacked)
    /// @return input decoded
    function afterWithdrawDecode(bytes memory packed)
        internal
        pure
        returns (AfterWithdrawInput memory input)
    {
        uint256 assets;
        uint256 shares;
        address receiver;
        address owner;
        address spender;
        uint256 withdrawnAssets;
        uint256 withdrawnShares;

        assembly { // solhint-disable-line no-inline-assembly
            let pointer := PACKED_FULL_LENGTH
            assets := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_FULL_LENGTH)
            shares := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_ADDRESS_LENGTH)
            receiver := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_ADDRESS_LENGTH)
            owner := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_ADDRESS_LENGTH)
            spender := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_FULL_LENGTH)
            withdrawnAssets := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_FULL_LENGTH)
            withdrawnShares := mload(add(packed, pointer))
        }

        input = AfterWithdrawInput(assets, shares, receiver, owner, spender, withdrawnAssets, withdrawnShares);
    }

    /// @dev Decodes packed data from the before borrow hook
    /// @param packed The packed data (via abi.encodePacked)
    /// @return input decoded
    function beforeBorrowDecode(bytes memory packed)
        internal
        pure
        returns (BeforeBorrowInput memory input)
    {
        uint256 assets;
        uint256 shares;
        address receiver;
        address borrower;
        address spender;
        assembly { // solhint-disable-line no-inline-assembly
            let pointer := PACKED_FULL_LENGTH
            assets := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_FULL_LENGTH)
            shares := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_ADDRESS_LENGTH)
            receiver := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_ADDRESS_LENGTH)
            borrower := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_ADDRESS_LENGTH)
            spender := mload(add(packed, pointer))
        }

        input = BeforeBorrowInput(assets, shares, receiver, borrower, spender);
    }

    /// @dev Decodes packed data from the after borrow hook
    /// @param packed The packed data (via abi.encodePacked)
    /// @return input decoded
    function afterBorrowDecode(bytes memory packed)
        internal
        pure
        returns (AfterBorrowInput memory input)
    {
        uint256 assets;
        uint256 shares;
        address receiver;
        address borrower;
        address spender;
        uint256 borrowedAssets;
        uint256 borrowedShares;

        assembly { // solhint-disable-line no-inline-assembly
            let pointer := PACKED_FULL_LENGTH
            assets := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_FULL_LENGTH)
            shares := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_ADDRESS_LENGTH)
            receiver := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_ADDRESS_LENGTH)
            borrower := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_ADDRESS_LENGTH)
            spender := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_FULL_LENGTH)
            borrowedAssets := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_FULL_LENGTH)
            borrowedShares := mload(add(packed, pointer))
        }

        input = AfterBorrowInput(assets, shares, receiver, borrower, spender, borrowedAssets, borrowedShares);
    }

    /// @dev Decodes packed data from the before repay hook
    /// @param packed The packed data (via abi.encodePacked)
    /// @return input decoded
    function beforeRepayDecode(bytes memory packed)
        internal
        pure
        returns (BeforeRepayInput memory input)
    {
        uint256 assets;
        uint256 shares;
        address borrower;
        address repayer;

        assembly { // solhint-disable-line no-inline-assembly
            let pointer := PACKED_FULL_LENGTH
            assets := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_FULL_LENGTH)
            shares := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_ADDRESS_LENGTH)
            borrower := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_ADDRESS_LENGTH)
            repayer := mload(add(packed, pointer))
        }

        input = BeforeRepayInput(assets, shares, borrower, repayer);
    }

    /// @dev Decodes packed data from the after repay hook
    /// @param packed The packed data (via abi.encodePacked)
    /// @return input decoded
    function afterRepayDecode(bytes memory packed)
        internal
        pure
        returns (AfterRepayInput memory input)
    {
        uint256 assets;
        uint256 shares;
        address borrower;
        address repayer;
        uint256 repaidAssets;
        uint256 repaidShares;

        assembly { // solhint-disable-line no-inline-assembly
            let pointer := PACKED_FULL_LENGTH
            assets := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_FULL_LENGTH)
            shares := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_ADDRESS_LENGTH)
            borrower := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_ADDRESS_LENGTH)
            repayer := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_FULL_LENGTH)
            repaidAssets := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_FULL_LENGTH)
            repaidShares := mload(add(packed, pointer))
        }

        input = AfterRepayInput(assets, shares, borrower, repayer, repaidAssets, repaidShares);
    }

    /// @dev Decodes packed data from the before flash loan hook
    /// @param packed The packed data (via abi.encodePacked)
    /// @return input decoded
    function beforeFlashLoanDecode(bytes memory packed)
        internal
        pure
        returns (BeforeFlashLoanInput memory input)
    {
        address receiver;
        address token;
        uint256 amount;

        assembly { // solhint-disable-line no-inline-assembly
            let pointer := PACKED_ADDRESS_LENGTH
            receiver := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_ADDRESS_LENGTH)
            token := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_FULL_LENGTH)
            amount := mload(add(packed, pointer))
        }

        input = BeforeFlashLoanInput(receiver, token, amount);
    }

    /// @dev Decodes packed data from the before flash loan hook
    /// @param packed The packed data (via abi.encodePacked)
    /// @return input decoded
    function afterFlashLoanDecode(bytes memory packed)
        internal
        pure
        returns (AfterFlashLoanInput memory input)
    {
        address receiver;
        address token;
        uint256 amount;
        uint256 fee;

        assembly { // solhint-disable-line no-inline-assembly
            let pointer := PACKED_ADDRESS_LENGTH
            receiver := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_ADDRESS_LENGTH)
            token := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_FULL_LENGTH)
            amount := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_FULL_LENGTH)
            fee := mload(add(packed, pointer))
        }

        input = AfterFlashLoanInput(receiver, token, amount, fee);
    }

    /// @dev Decodes packed data from the transition collateral hook
    /// @param packed The packed data (via abi.encodePacked)
    /// @return input decoded
    function beforeTransitionCollateralDecode(bytes memory packed)
        internal
        pure
        returns (BeforeTransitionCollateralInput memory input)
    {
        uint256 shares;
        address owner;

        assembly { // solhint-disable-line no-inline-assembly
            let pointer := PACKED_FULL_LENGTH
            shares := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_ADDRESS_LENGTH)
            owner := mload(add(packed, pointer))
        }

        input = BeforeTransitionCollateralInput(shares, owner);
    }

    /// @dev Decodes packed data from the transition collateral hook
    /// @param packed The packed data (via abi.encodePacked)
    /// @return input decoded
    function afterTransitionCollateralDecode(bytes memory packed)
        internal
        pure
        returns (AfterTransitionCollateralInput memory input)
    {
        uint256 shares;
        address owner;
        uint256 assets;

        assembly { // solhint-disable-line no-inline-assembly
            let pointer := PACKED_FULL_LENGTH
            shares := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_ADDRESS_LENGTH)
            owner := mload(add(packed, pointer))
            pointer := add(pointer, PACKED_FULL_LENGTH)
            assets := mload(add(packed, pointer))
        }

        input = AfterTransitionCollateralInput(shares, owner, assets);
    }

    /// @dev Decodes packed data from the switch collateral hook
    /// @param packed The packed data (via abi.encodePacked)
    /// @return input decoded
    function switchCollateralDecode(bytes memory packed)
        internal
        pure
        returns (SwitchCollateralInput memory input)
    {
        address user;

        assembly { // solhint-disable-line no-inline-assembly
            let pointer := PACKED_ADDRESS_LENGTH
            user := mload(add(packed, pointer))
        }

        input = SwitchCollateralInput(user);
    }

    /// @dev Converts a uint8 to a boolean
    function _toBoolean(uint8 _value) internal pure returns (bool result) {
        if (_value == 0) {
            result = false;
        } else if (_value == 1) {
            result = true;
        } else {
            revert FailedToParseBoolean();
        }
    }
}

// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity 0.8.28;

import {IERC20} from "openzeppelin5/interfaces/IERC20.sol";
import {SafeERC20} from "openzeppelin5/token/ERC20/utils/SafeERC20.sol";

import {ISilo} from "silo-core/contracts/interfaces/ISilo.sol";
import {IShareToken} from "silo-core/contracts/interfaces/IShareToken.sol";
import {IPartialLiquidation} from "silo-core/contracts/interfaces/IPartialLiquidation.sol";
import {ISiloConfig} from "silo-core/contracts/interfaces/ISiloConfig.sol";
import {IHookReceiver} from "silo-core/contracts/interfaces/IHookReceiver.sol";

import {SiloMathLib} from "silo-core/contracts/lib/SiloMathLib.sol";
import {Hook} from "silo-core/contracts/lib/Hook.sol";
import {Rounding} from "silo-core/contracts/lib/Rounding.sol";
import {RevertLib} from "silo-core/contracts/lib/RevertLib.sol";
import {CallBeforeQuoteLib} from "silo-core/contracts/lib/CallBeforeQuoteLib.sol";

import {PartialLiquidationExecLib} from "./lib/PartialLiquidationExecLib.sol";

/// @title PartialLiquidation module for executing liquidations
/// @dev if we need additional hook functionality, this contract should be included as parent
contract PartialLiquidation is IPartialLiquidation, IHookReceiver {
    using SafeERC20 for IERC20;
    using Hook for uint24;
    using CallBeforeQuoteLib for ISiloConfig.ConfigData;

    ISiloConfig public siloConfig;

    struct LiquidationCallParams {
        address liquidator;
        address silo;
        address borrower;
        uint256 repayDebtAssets;
        uint256 withdrawCollateral;
        bool receiveSToken;
    }

    function initialize(ISiloConfig _siloConfig, bytes calldata) external virtual {
        _initialize(_siloConfig);
    }

    function beforeAction(address, uint256, bytes calldata) external virtual {
        // not in use
    }

    function afterAction(address, uint256, bytes calldata) external virtual {
        // not in use
    }

    /// @inheritdoc IPartialLiquidation
    function liquidationCall( // solhint-disable-line function-max-lines, code-complexity
        address _collateralAsset,
        address _debtAsset,
        address _borrower,
        uint256 _maxDebtToCover,
        bool _receiveSToken
    )
        external
        virtual
        returns (uint256 withdrawCollateral, uint256 repayDebtAssets)
    {
        ISiloConfig siloConfigCached = siloConfig;

        require(address(siloConfigCached) != address(0), EmptySiloConfig());
        require(_maxDebtToCover != 0, NoDebtToCover());

        siloConfigCached.turnOnReentrancyProtection();

        (
            ISiloConfig.ConfigData memory collateralConfig,
            ISiloConfig.ConfigData memory debtConfig
        ) = _fetchConfigs(siloConfigCached, _collateralAsset, _debtAsset, _borrower);

        uint256 collateralShares;
        uint256 protectedShares;
        uint256 withdrawAssetsFromCollateral;
        uint256 withdrawAssetsFromProtected;
        bytes4 customError;

        (
            withdrawAssetsFromCollateral, withdrawAssetsFromProtected, repayDebtAssets, customError
        ) = PartialLiquidationExecLib.getExactLiquidationAmounts(
            collateralConfig,
            debtConfig,
            _borrower,
            _maxDebtToCover,
            collateralConfig.liquidationFee
        );

        RevertLib.revertIfError(customError);

        // we do not allow dust so full liquidation is required
        require(repayDebtAssets <= _maxDebtToCover, FullLiquidationRequired());

        {
            IERC20(debtConfig.token).safeTransferFrom(msg.sender, address(this), repayDebtAssets);
            IERC20(debtConfig.token).safeIncreaseAllowance(debtConfig.silo, repayDebtAssets);

            address shareTokenReceiver = _receiveSToken ? msg.sender : address(this);

            collateralShares = _callShareTokenForwardTransferNoChecks(
                collateralConfig.silo,
                _borrower,
                shareTokenReceiver,
                withdrawAssetsFromCollateral,
                collateralConfig.collateralShareToken,
                ISilo.AssetType.Collateral
            );

            protectedShares = _callShareTokenForwardTransferNoChecks(
                collateralConfig.silo,
                _borrower,
                shareTokenReceiver,
                withdrawAssetsFromProtected,
                collateralConfig.protectedShareToken,
                ISilo.AssetType.Protected
            );
        }

        siloConfigCached.turnOffReentrancyProtection();

        ISilo(debtConfig.silo).repay(repayDebtAssets, _borrower);

        if (_receiveSToken) {
            if (collateralShares != 0) {
                withdrawCollateral = ISilo(collateralConfig.silo).previewRedeem(
                    collateralShares,
                    ISilo.CollateralType.Collateral
                );
            }

            if (protectedShares != 0) {
                unchecked {
                    // protected and collateral values were split from total collateral to withdraw,
                    // so we will not overflow when we sum them back, especially that on redeem, we rounding down
                    withdrawCollateral += ISilo(collateralConfig.silo).previewRedeem(
                        protectedShares,
                        ISilo.CollateralType.Protected
                    );
                }
            }
        } else {
            // in case of liquidation redeem, hook transfers sTokens to itself and it has no debt
            // so solvency will not be checked in silo on redeem action

            // if share token offset is more than 0, positive number of shares can generate 0 assets
            // so there is a need to check assets before we withdraw collateral/protected

            if (collateralShares != 0) {
                withdrawCollateral = ISilo(collateralConfig.silo).redeem({
                    _shares: collateralShares,
                    _receiver: msg.sender,
                    _owner: address(this),
                    _collateralType: ISilo.CollateralType.Collateral
                });
            }

            if (protectedShares != 0) {
                unchecked {
                    // protected and collateral values were split from total collateral to withdraw,
                    // so we will not overflow when we sum them back, especially that on redeem, we rounding down
                    withdrawCollateral += ISilo(collateralConfig.silo).redeem({
                        _shares: protectedShares,
                        _receiver: msg.sender,
                        _owner: address(this),
                        _collateralType: ISilo.CollateralType.Protected
                    });
                }
            }
        }

        { // stack too deep
            LiquidationCallParams memory params = LiquidationCallParams({
                liquidator: msg.sender,
                silo: debtConfig.silo,
                borrower: _borrower,
                repayDebtAssets: repayDebtAssets,
                withdrawCollateral: withdrawCollateral,
                receiveSToken: _receiveSToken
            });

            emit LiquidationCall(
                params.liquidator,
                params.silo,
                params.borrower,
                params.repayDebtAssets,
                params.withdrawCollateral,
                params.receiveSToken
            );
        }
    }

    function hookReceiverConfig(address) external virtual view returns (uint24 hooksBefore, uint24 hooksAfter) {
        return (0, 0);
    }

    /// @inheritdoc IPartialLiquidation
    function maxLiquidation(address _borrower)
        external
        view
        virtual
        returns (uint256 collateralToLiquidate, uint256 debtToRepay, bool sTokenRequired)
    {
        return PartialLiquidationExecLib.maxLiquidation(siloConfig, _borrower);
    }

    function _fetchConfigs(
        ISiloConfig _siloConfigCached,
        address _collateralAsset,
        address _debtAsset,
        address _borrower
    )
        internal
        virtual
        returns (
            ISiloConfig.ConfigData memory collateralConfig,
            ISiloConfig.ConfigData memory debtConfig
        )
    {
        (collateralConfig, debtConfig) = _siloConfigCached.getConfigsForSolvency(_borrower);

        require(debtConfig.silo != address(0), UserIsSolvent());
        require(_collateralAsset == collateralConfig.token, UnexpectedCollateralToken());
        require(_debtAsset == debtConfig.token, UnexpectedDebtToken());

        ISilo(debtConfig.silo).accrueInterest();

        if (collateralConfig.silo != debtConfig.silo) {
            ISilo(collateralConfig.silo).accrueInterest();
            collateralConfig.callSolvencyOracleBeforeQuote();
            debtConfig.callSolvencyOracleBeforeQuote();
        }
    }

    function _callShareTokenForwardTransferNoChecks(
        address _silo,
        address _borrower,
        address _receiver,
        uint256 _withdrawAssets,
        address _shareToken,
        ISilo.AssetType _assetType
    ) internal virtual returns (uint256 shares) {
        if (_withdrawAssets == 0) return 0;
        
        shares = SiloMathLib.convertToShares(
            _withdrawAssets,
            ISilo(_silo).getTotalAssetsStorage(_assetType),
            IShareToken(_shareToken).totalSupply(),
            Rounding.LIQUIDATE_TO_SHARES,
            ISilo.AssetType(_assetType)
        );

        if (shares == 0) return 0;

        IShareToken(_shareToken).forwardTransferFromNoChecks(_borrower, _receiver, shares);
    }

    function _initialize(ISiloConfig _siloConfig) internal virtual {
        require(address(_siloConfig) != address(0), EmptySiloConfig());
        require(address(siloConfig) == address(0), AlreadyConfigured());

        siloConfig = _siloConfig;
    }
}

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

interface IGaugeLike {
    event GaugeKilled();
    event GaugeUnKilled();

    error EmptyShareToken();

    function afterTokenTransfer(
        address _sender,
        uint256 _senderBalance,
        address _recipient,
        uint256 _recipientBalance,
        uint256 _totalSupply,
        uint256 _amount
    ) external;

    /// @notice Kills the gauge
    function killGauge() external;

    /// @notice Un kills the gauge
    function unkillGauge() external;

    // solhint-disable func-name-mixedcase
    function share_token() external view returns (address);

    function is_killed() external view returns (bool);
    // solhint-enable func-name-mixedcase
}

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

import {IShareToken} from "./IShareToken.sol";
import {IHookReceiver} from "./IHookReceiver.sol";
import {IGaugeLike as IGauge} from "./IGaugeLike.sol";

/// @notice Silo share token hook receiver for the gauge
interface IGaugeHookReceiver is IHookReceiver {
    /// @dev Emit when the new gauge is configured
    /// @param gauge Gauge for which hook receiver will send notification about the share token balance updates.
    /// @param shareToken Share token.
    event GaugeConfigured(address gauge, address shareToken);
    /// @dev Emit when the gauge is removed
    /// @param shareToken Share token for which the gauge was removed
    event GaugeRemoved(address shareToken);

    /// @dev Revert on an attempt to initialize with a zero `_owner` address
    error OwnerIsZeroAddress();
    /// @dev Revert on an attempt to initialize with an invalid `_shareToken` address
    error InvalidShareToken();
    /// @dev Revert on an attempt to setup a `_gauge` with a different `_shareToken`
    /// than hook receiver were initialized
    error WrongGaugeShareToken();
    /// @dev Revert on an attempt to remove a `gauge` that still can mint SILO tokens
    error CantRemoveActiveGauge();
    /// @dev Revert on an attempt to set a gauge with a zero address
    error EmptyGaugeAddress();
    /// @dev Revert if the hook received `beforeAction` notification
    error RequestNotSupported();
    /// @dev Revert on an attempt to remove not configured gauge
    error GaugeIsNotConfigured();
    /// @dev Revert on an attempt to configure already configured gauge
    error GaugeAlreadyConfigured();

    /// @notice Configuration of the gauge
    /// for which the hook receiver should send notifications about the share token balance updates.
    /// The `_gauge` can be updated by an owner (DAO)
    /// @dev Overrides existing configuration
    /// @param _shareToken Share token for which the gauge is configured
    /// @param _gauge Array of gauges for which hook receiver will send notification.
    function setGauge(IGauge _gauge, IShareToken _shareToken) external;

    /// @notice Remove the gauge from the hook receiver for the share token
    /// @param _shareToken Share token for which the gauge needs to be removed
    function removeGauge(IShareToken _shareToken) external;

    /// @notice Get the gauge
    function gauge() external view returns (IGauge);

    /// @notice Get the share token
    function shareToken() external view returns (IShareToken);

    /// @notice Get the gauge for the share token
    /// @param _shareToken Share token
    function configuredGauges(IShareToken _shareToken) external view returns (IGauge);
}

// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity 0.8.28;

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

abstract contract SiloHookReceiver is IHookReceiver {
    mapping(address silo => HookConfig) private _hookConfig;

    function _setHookConfig(address _silo, uint256 _hooksBefore, uint256 _hooksAfter) internal virtual {
        _hookConfig[_silo] = HookConfig(uint24(_hooksBefore), uint24(_hooksAfter));
        emit HookConfigured(_silo, uint24(_hooksBefore), uint24(_hooksAfter));

        ISilo(_silo).updateHooks();
    }

    function _hookReceiverConfig(address _silo) internal view virtual returns (uint24 hooksBefore, uint24 hooksAfter) {
        HookConfig memory hookConfig = _hookConfig[_silo];

        hooksBefore = hookConfig.hooksBefore;
        hooksAfter = hookConfig.hooksAfter;
    }

    function _getHooksBefore(address _silo) internal view virtual returns (uint256 hooksBefore) {
        hooksBefore = _hookConfig[_silo].hooksBefore;
    }

    function _getHooksAfter(address _silo) internal view virtual returns (uint256 hooksAfter) {
        hooksAfter = _hookConfig[_silo].hooksAfter;
    }
}

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

pragma solidity ^0.8.20;

import {Context} from "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * The initial owner is set to the address provided by the deployer. This can
 * later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    /**
     * @dev The caller account is not authorized to perform an operation.
     */
    error OwnableUnauthorizedAccount(address account);

    /**
     * @dev The owner is not a valid owner account. (eg. `address(0)`)
     */
    error OwnableInvalidOwner(address owner);

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the address provided by the deployer as the initial owner.
     */
    constructor(address initialOwner) {
        if (initialOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(initialOwner);
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        if (owner() != _msgSender()) {
            revert OwnableUnauthorizedAccount(_msgSender());
        }
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        if (newOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// 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
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;
    }

    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 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 WithdrawnFeed(uint256 daoFees, uint256 deployerFees);

    error Unsupported();
    error NothingToWithdraw();
    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 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 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) (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) (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: 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
    );

    /// @dev Revert if provided silo configuration during initialization is empty
    error EmptySiloConfig();
    /// @dev Revert if the hook receiver is already configured/initialized
    error AlreadyConfigured();
    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;

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

interface IHookReceiver {
    struct HookConfig {
        uint24 hooksBefore;
        uint24 hooksAfter;
    }

    event HookConfigured(address silo, uint24 hooksBefore, uint24 hooksAfter);

    /// @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: 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;

        // save to uncheck because variable can not be more than max
        uint256 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);
    }
}

// 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);
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity >=0.7.6 <=0.9.0;

library RevertLib {
    function revertBytes(bytes memory _errMsg, string memory _customErr) internal pure {
        if (_errMsg.length > 0) {
            assembly { // solhint-disable-line no-inline-assembly
                revert(add(32, _errMsg), mload(_errMsg))
            }
        }

        revert(_customErr);
    }

    function revertIfError(bytes4 _errorSelector) internal pure {
        if (_errorSelector == 0) return;

        bytes memory customError = abi.encodeWithSelector(_errorSelector);

        assembly {
            revert(add(32, customError), mload(customError))
        }
    }
}

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

import {ISiloConfig} from "../interfaces/ISiloConfig.sol";
import {ISiloOracle} from "../interfaces/ISiloOracle.sol";

library CallBeforeQuoteLib {
    /// @dev Call `beforeQuote` on the `solvencyOracle` oracle
    /// @param _config Silo config data
    function callSolvencyOracleBeforeQuote(ISiloConfig.ConfigData memory _config) internal {
        if (_config.callBeforeQuote && _config.solvencyOracle != address(0)) {
            ISiloOracle(_config.solvencyOracle).beforeQuote(_config.token);
        }
    }

    /// @dev Call `beforeQuote` on the `maxLtvOracle` oracle
    /// @param _config Silo config data
    function callMaxLtvOracleBeforeQuote(ISiloConfig.ConfigData memory _config) internal {
        if (_config.callBeforeQuote && _config.maxLtvOracle != address(0)) {
            ISiloOracle(_config.maxLtvOracle).beforeQuote(_config.token);
        }
    }
}

// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity 0.8.28;

import {ISilo} from "silo-core/contracts/interfaces/ISilo.sol";
import {ISiloConfig} from "silo-core/contracts/interfaces/ISiloConfig.sol";
import {IPartialLiquidation} from "silo-core/contracts/interfaces/IPartialLiquidation.sol";
import {SiloSolvencyLib} from "silo-core/contracts/lib/SiloSolvencyLib.sol";
import {PartialLiquidationLib} from "./PartialLiquidationLib.sol";

library PartialLiquidationExecLib {
    /// @dev it will be user responsibility to check profit, this method expect interest to be already accrued
    function getExactLiquidationAmounts(
        ISiloConfig.ConfigData memory _collateralConfig,
        ISiloConfig.ConfigData memory _debtConfig,
        address _user,
        uint256 _maxDebtToCover,
        uint256 _liquidationFee
    )
        internal
        view
        returns (
            uint256 withdrawAssetsFromCollateral,
            uint256 withdrawAssetsFromProtected,
            uint256 repayDebtAssets,
            bytes4 customError
        )
    {
        SiloSolvencyLib.LtvData memory ltvData = SiloSolvencyLib.getAssetsDataForLtvCalculations({
            _collateralConfig: _collateralConfig,
            _debtConfig: _debtConfig,
            _borrower: _user,
            _oracleType: ISilo.OracleType.Solvency,
            _accrueInMemory: ISilo.AccrueInterestInMemory.No,
            _debtShareBalanceCached:0 /* no cached balance */
        });

        uint256 borrowerCollateralToLiquidate;

        (
            borrowerCollateralToLiquidate, repayDebtAssets, customError
        ) = liquidationPreview(
            ltvData,
            PartialLiquidationLib.LiquidationPreviewParams({
                collateralLt: _collateralConfig.lt,
                collateralConfigAsset: _collateralConfig.token,
                debtConfigAsset: _debtConfig.token,
                maxDebtToCover: _maxDebtToCover,
                liquidationTargetLtv: _collateralConfig.liquidationTargetLtv,
                liquidationFee: _liquidationFee
            })
        );

        (
            withdrawAssetsFromCollateral, withdrawAssetsFromProtected
        ) = PartialLiquidationLib.splitReceiveCollateralToLiquidate(
            borrowerCollateralToLiquidate, ltvData.borrowerProtectedAssets
        );
    }

    /// @dev debt keeps growing over time, so when dApp use this view to calculate max, tx should never revert
    /// because actual max can be only higher
    // solhint-disable-next-line function-max-lines
    function maxLiquidation(ISiloConfig _siloConfig, address _borrower)
        internal
        view
        returns (uint256 collateralToLiquidate, uint256 debtToRepay, bool sTokenRequired)
    {
        (
            ISiloConfig.ConfigData memory collateralConfig,
            ISiloConfig.ConfigData memory debtConfig
        ) = _siloConfig.getConfigsForSolvency(_borrower);

        if (debtConfig.silo == address(0)) {
            return (0, 0, false);
        }

        SiloSolvencyLib.LtvData memory ltvData = SiloSolvencyLib.getAssetsDataForLtvCalculations(
            collateralConfig,
            debtConfig,
            _borrower,
            ISilo.OracleType.Solvency,
            ISilo.AccrueInterestInMemory.Yes,
            0 /* no cached balance */
        );

        if (ltvData.borrowerDebtAssets == 0) return (0, 0, false);

        (
            uint256 sumOfCollateralValue, uint256 debtValue
        ) = SiloSolvencyLib.getPositionValues(ltvData, collateralConfig.token, debtConfig.token);

        uint256 sumOfCollateralAssets = ltvData.borrowerProtectedAssets + ltvData.borrowerCollateralAssets;

        if (sumOfCollateralValue == 0) return (sumOfCollateralAssets, ltvData.borrowerDebtAssets, false);

        uint256 ltvInDp = SiloSolvencyLib.ltvMath(debtValue, sumOfCollateralValue);
        if (ltvInDp <= collateralConfig.lt) return (0, 0, false); // user solvent

        (collateralToLiquidate, debtToRepay) = PartialLiquidationLib.maxLiquidation(
            sumOfCollateralAssets,
            sumOfCollateralValue,
            ltvData.borrowerDebtAssets,
            debtValue,
            collateralConfig.liquidationTargetLtv,
            collateralConfig.liquidationFee
        );

        // maxLiquidation() can underestimate collateral by `PartialLiquidationLib._UNDERESTIMATION`,
        // when we do that, actual collateral that we will transfer will match exactly liquidity,
        // but we will liquidate higher value by 1 or 2, then sTokenRequired will return false,
        // but we can not withdraw (because we will be short by 2) solution is to include this 2wei here
        unchecked {
            // safe to uncheck, because we underestimated this value in a first place by _UNDERESTIMATION
            uint256 overestimatedCollateral = collateralToLiquidate + PartialLiquidationLib._UNDERESTIMATION;
            sTokenRequired = overestimatedCollateral > ISilo(collateralConfig.silo).getLiquidity();
        }
    }

    /// @return receiveCollateralAssets collateral + protected to liquidate, on self liquidation when borrower repay
    /// all debt, he will receive all collateral back
    /// @return repayDebtAssets
    function liquidationPreview( // solhint-disable-line function-max-lines, code-complexity
        SiloSolvencyLib.LtvData memory _ltvData,
        PartialLiquidationLib.LiquidationPreviewParams memory _params
    )
        internal
        view
        returns (uint256 receiveCollateralAssets, uint256 repayDebtAssets, bytes4 customError)
    {
        uint256 sumOfCollateralAssets = _ltvData.borrowerCollateralAssets + _ltvData.borrowerProtectedAssets;

        if (_ltvData.borrowerDebtAssets == 0 || _params.maxDebtToCover == 0) {
            return (0, 0, IPartialLiquidation.NoDebtToCover.selector);
        }

        if (sumOfCollateralAssets == 0) {
            return (
                0,
                _params.maxDebtToCover > _ltvData.borrowerDebtAssets
                    ? _ltvData.borrowerDebtAssets
                    : _params.maxDebtToCover,
                bytes4(0) // no error
            );
        }

        (
            uint256 sumOfBorrowerCollateralValue, uint256 totalBorrowerDebtValue, uint256 ltvBefore
        ) = SiloSolvencyLib.calculateLtv(_ltvData, _params.collateralConfigAsset, _params.debtConfigAsset);

        if (_params.collateralLt >= ltvBefore) return (0, 0, IPartialLiquidation.UserIsSolvent.selector);

        uint256 ltvAfter;

        (receiveCollateralAssets, repayDebtAssets, ltvAfter) = PartialLiquidationLib.liquidationPreview(
            ltvBefore,
            sumOfCollateralAssets,
            sumOfBorrowerCollateralValue,
            _ltvData.borrowerDebtAssets,
            totalBorrowerDebtValue,
            _params
        );

        if (receiveCollateralAssets == 0 || repayDebtAssets == 0) {
            return (0, 0, IPartialLiquidation.NoRepayAssets.selector);
        }
    }
}

// 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 v5.0.0) (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
// 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);

    error MissingHookReceiver();
    error ZeroAddress();
    error DaoFeeReceiverZeroAddress();
    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();

    /// @notice Create a new Silo.
    /// @param _initData Silo initialization data.
    /// @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.
    function createSilo(
        ISiloConfig.InitData memory _initData,
        ISiloConfig _siloConfig,
        address _siloImpl,
        address _shareProtectedCollateralTokenImpl,
        address _shareDebtTokenImpl
    )
        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 new DAO fee receiver.
    /// @param _newDaoFeeReceiver Address of the new DAO fee receiver.
    function setDaoFeeReceiver(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 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
// 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/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
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: 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: GPL-2.0-or-later
pragma solidity 0.8.28;

import {Math} from "openzeppelin5/utils/math/Math.sol";

import {IPartialLiquidation} from "silo-core/contracts/interfaces/IPartialLiquidation.sol";
import {Rounding} from "silo-core/contracts/lib/Rounding.sol";

library PartialLiquidationLib {
    using Math for uint256;

    struct LiquidationPreviewParams {
        uint256 collateralLt;
        address collateralConfigAsset;
        address debtConfigAsset;
        uint256 maxDebtToCover;
        uint256 liquidationFee;
        uint256 liquidationTargetLtv;
    }

    /// @dev this is basically LTV == 100%
    uint256 internal constant _BAD_DEBT = 1e18;

    uint256 internal constant _PRECISION_DECIMALS = 1e18;

    /// @dev underestimation for collateral that user gets on liquidation
    /// liquidation is executed based on sTokens, additional flow is: assets -> shares -> assets
    /// this two conversions are rounding down and can create 2 wai difference
    uint256 internal constant _UNDERESTIMATION = 2;

    /// @dev If the ratio of the repay value to the total debt value during liquidation exceeds the 
    /// _DEBT_DUST_LEVEL threshold, a full liquidation is triggered.
    /// For example, if the total debt value is 51 and the dust level is set at 98%, 
    /// then we are unable to liquidate 50, we must proceed to liquidate the entire 51.
    uint256 internal constant _DEBT_DUST_LEVEL = 0.9e18; // 90%

    /// @dev debt keeps growing over time, so when dApp use this view to calculate max, tx should never revert
    /// because actual max can be only higher
    /// @notice This method does not check, if user is solvent and it can return non zero result when user solvent
    function maxLiquidation(
        uint256 _sumOfCollateralAssets,
        uint256 _sumOfCollateralValue,
        uint256 _borrowerDebtAssets,
        uint256 _borrowerDebtValue,
        uint256 _liquidationTargetLTV,
        uint256 _liquidationFee
    )
        internal
        pure
        returns (uint256 collateralToLiquidate, uint256 debtToRepay)
    {
        (
            uint256 collateralValueToLiquidate, uint256 repayValue
        ) = maxLiquidationPreview(
            _sumOfCollateralValue,
            _borrowerDebtValue,
            _liquidationTargetLTV,
            _liquidationFee
        );

        collateralToLiquidate = valueToAssetsByRatio(
            collateralValueToLiquidate,
            _sumOfCollateralAssets,
            _sumOfCollateralValue
        );

        if (collateralToLiquidate > _UNDERESTIMATION) {
            // -_UNDERESTIMATION here is to underestimate collateral that user gets on liquidation
            // liquidation is executed based on sTokens, additional flow is: assets -> shares -> assets
            // this two conversions are rounding down and can create 2 wei difference

            // we will not underflow on -_UNDERESTIMATION because collateralToLiquidate is >= _UNDERESTIMATION
            unchecked { collateralToLiquidate -= _UNDERESTIMATION; }
        } else {
            collateralToLiquidate = 0;
        }

        debtToRepay = valueToAssetsByRatio(repayValue, _borrowerDebtAssets, _borrowerDebtValue);
    }

    /// @dev in case of bad debt, we do not apply any restrictions.
    /// @notice might revert when one of this values will be zero:
    /// `_sumOfCollateralValue`, `_borrowerDebtAssets`, `_borrowerDebtValue`
    function liquidationPreview( // solhint-disable-line function-max-lines
        uint256 _ltvBefore,
        uint256 _sumOfCollateralAssets,
        uint256 _sumOfCollateralValue,
        uint256 _borrowerDebtAssets,
        uint256 _borrowerDebtValue,
        LiquidationPreviewParams memory _params
    )
        internal
        pure
        returns (uint256 collateralToLiquidate, uint256 debtToRepay, uint256 ltvAfter)
    {
        uint256 collateralValueToLiquidate;
        uint256 debtValueToRepay;

        if (_ltvBefore >= _BAD_DEBT) {
            // in case of bad debt, we allow for any amount
            debtToRepay = _params.maxDebtToCover > _borrowerDebtAssets ? _borrowerDebtAssets : _params.maxDebtToCover;
            debtValueToRepay = valueToAssetsByRatio(debtToRepay, _borrowerDebtValue, _borrowerDebtAssets);
        } else {
            uint256 maxRepayValue = estimateMaxRepayValue(
                _borrowerDebtValue,
                _sumOfCollateralValue,
                _params.liquidationTargetLtv,
                _params.liquidationFee
            );

            if (maxRepayValue == _borrowerDebtValue) {
                // forced full liquidation
                debtToRepay = _borrowerDebtAssets;
                debtValueToRepay = _borrowerDebtValue;
            } else {
                // partial liquidation
                uint256 maxDebtToRepay = valueToAssetsByRatio(maxRepayValue, _borrowerDebtAssets, _borrowerDebtValue);
                debtToRepay = _params.maxDebtToCover > maxDebtToRepay ? maxDebtToRepay : _params.maxDebtToCover;
                debtValueToRepay = valueToAssetsByRatio(debtToRepay, _borrowerDebtValue, _borrowerDebtAssets);
            }
        }

        collateralValueToLiquidate = calculateCollateralToLiquidate(
            debtValueToRepay, _sumOfCollateralValue, _params.liquidationFee
        );

        collateralToLiquidate = valueToAssetsByRatio(
            collateralValueToLiquidate,
            _sumOfCollateralAssets,
            _sumOfCollateralValue
        );

        ltvAfter = _calculateLtvAfter(
            _sumOfCollateralValue, _borrowerDebtValue, collateralValueToLiquidate, debtValueToRepay
        );
    }

    /// @notice reverts on `_totalValue` == 0
    /// @dev calculate assets based on ratio: assets = (value, totalAssets, totalValue)
    /// to calculate assets => value, use it like: value = (assets, totalValue, totalAssets)
    function valueToAssetsByRatio(uint256 _value, uint256 _totalAssets, uint256 _totalValue)
        internal
        pure
        returns (uint256 assets)
    {
        require(_totalValue != 0, IPartialLiquidation.UnknownRatio());

        assets = _value * _totalAssets / _totalValue;
    }

    /// @notice this function never reverts
    /// @dev in case there is not enough collateral to liquidate, whole collateral is returned, no revert
    /// @param  _totalBorrowerCollateralValue can not be 0, otherwise revert
    function calculateCollateralsToLiquidate(
        uint256 _debtValueToCover,
        uint256 _totalBorrowerCollateralValue,
        uint256 _totalBorrowerCollateralAssets,
        uint256 _liquidationFee
    ) internal pure returns (uint256 collateralAssetsToLiquidate, uint256 collateralValueToLiquidate) {
        collateralValueToLiquidate = calculateCollateralToLiquidate(
            _debtValueToCover, _totalBorrowerCollateralValue, _liquidationFee
        );

        // this is also true if _totalBorrowerCollateralValue == 0, so div below will not revert
        if (collateralValueToLiquidate == _totalBorrowerCollateralValue) {
            return (_totalBorrowerCollateralAssets, _totalBorrowerCollateralValue);
        }

        // this will never revert, because of `if collateralValueToLiquidate == _totalBorrowerCollateralValue`
        collateralAssetsToLiquidate = valueToAssetsByRatio(
            collateralValueToLiquidate, _totalBorrowerCollateralAssets, _totalBorrowerCollateralValue
        );
    }

    /// @dev the math is based on: (Dv - x)/(Cv - (x + xf)) = LT
    /// where Dv: debt value, Cv: collateral value, LT: expected LT, f: liquidation fee, x: is value we looking for
    /// @notice in case math fail to calculate repay value, eg when collateral is not enough to cover repay and fee
    /// function will return full debt value and full collateral value, it will not revert. It is up to liquidator
    /// to make decision if it will be profitable
    /// @param _totalBorrowerCollateralValue regular and protected
    /// @param _ltvAfterLiquidation % of `repayValue` that liquidator will use as profit from liquidating
    function maxLiquidationPreview(
        uint256 _totalBorrowerCollateralValue,
        uint256 _totalBorrowerDebtValue,
        uint256 _ltvAfterLiquidation,
        uint256 _liquidationFee
    ) internal pure returns (uint256 collateralValueToLiquidate, uint256 repayValue) {
        repayValue = estimateMaxRepayValue(
            _totalBorrowerDebtValue, _totalBorrowerCollateralValue, _ltvAfterLiquidation, _liquidationFee
        );

        collateralValueToLiquidate = calculateCollateralToLiquidate(
            repayValue, _totalBorrowerCollateralValue, _liquidationFee
        );
    }

    /// @param _maxDebtToCover assets or value, but must be in sync with `_totalCollateral`
    /// @param _sumOfCollateral assets or value, but must be in sync with `_maxDebtToCover`
    /// @return toLiquidate depends on inputs, it might be collateral value or collateral assets
    function calculateCollateralToLiquidate(uint256 _maxDebtToCover, uint256 _sumOfCollateral, uint256 _liquidationFee)
        internal
        pure
        returns (uint256 toLiquidate)
    {
        uint256 fee = _maxDebtToCover * _liquidationFee / _PRECISION_DECIMALS;

        toLiquidate = _maxDebtToCover + fee;

        if (toLiquidate > _sumOfCollateral) {
            toLiquidate = _sumOfCollateral;
        }
    }

    /// @dev the math is based on: (Dv - x)/(Cv - (x + xf)) = LTV
    /// where 
    ///    Dv: debt value,
    ///    Cv: collateral value,
    ///    LTV: expected LTV after liquidation,
    ///    f: liquidation fee,
    ///    x: is value we looking for
    /// x = (Dv - LTV * Cv) / (DP - LTV - LTV * f)
    /// result also take into consideration the dust
    /// @notice protocol does not uses this method, because in protocol our input is debt to cover in assets
    /// however this is useful to figure out what is max debt to cover.
    /// @param _totalBorrowerCollateralValue regular and protected
    /// @param _ltvAfterLiquidation % of `repayValue` that liquidator will use as profit from liquidating
    /// @return repayValue max repay value that is allowed for partial liquidation. if this value equals
    /// `_totalBorrowerDebtValue`, that means dust threshold was triggered and result force to do full liquidation
    function estimateMaxRepayValue( // solhint-disable-line code-complexity
        uint256 _totalBorrowerDebtValue,
        uint256 _totalBorrowerCollateralValue,
        uint256 _ltvAfterLiquidation,
        uint256 _liquidationFee
    ) internal pure returns (uint256 repayValue) {
        if (_totalBorrowerDebtValue == 0) return 0;
        if (_liquidationFee >= _PRECISION_DECIMALS) return 0;

        // this will cover case, when _totalBorrowerCollateralValue == 0
        if (_totalBorrowerDebtValue >= _totalBorrowerCollateralValue) return _totalBorrowerDebtValue;
        if (_ltvAfterLiquidation == 0) return _totalBorrowerDebtValue; // full liquidation

        // x = (Dv - LTV * Cv) / (DP - LTV - LTV * f) ==> (Dv - LTV * Cv) / (DP - (LTV + LTV * f))
        uint256 ltCv = _ltvAfterLiquidation * _totalBorrowerCollateralValue;
        // to lose as low precision as possible, instead of `ltCv/1e18`, we increase precision of DebtValue
        _totalBorrowerDebtValue *= _PRECISION_DECIMALS;

        // negative value means our current LTV is lower than _ltvAfterLiquidation
        if (ltCv >= _totalBorrowerDebtValue) return 0;

        uint256 dividerR; // LTV + LTV * f

        unchecked {
            // safe because of above `LTCv >= _totalBorrowerDebtValue`
            repayValue = _totalBorrowerDebtValue - ltCv;
            // we checked at begin `_liquidationFee >= _PRECISION_DECIMALS`
            // mul on DP will not overflow on uint256, div is safe
            dividerR = _ltvAfterLiquidation + _ltvAfterLiquidation * _liquidationFee / _PRECISION_DECIMALS;
        }

        // now we can go back to proper precision
        unchecked { _totalBorrowerDebtValue /= _PRECISION_DECIMALS; }

        // if dividerR is more than 100%, means it is impossible to go down to _ltvAfterLiquidation, return all
        if (dividerR >= _PRECISION_DECIMALS) {
             return _totalBorrowerDebtValue;
        }

        unchecked { repayValue /= (_PRECISION_DECIMALS - dividerR); }

        // early return so we do not have to check for dust
        if (repayValue > _totalBorrowerDebtValue) return _totalBorrowerDebtValue;

        // here is weird case, sometimes it is impossible to go down to target LTV, however math can calculate it
        // eg with negative numerator and denominator and result will be positive, that's why we simply return all
        // we also cover dust case here
        return repayValue * _PRECISION_DECIMALS / _totalBorrowerDebtValue > _DEBT_DUST_LEVEL
            ? _totalBorrowerDebtValue
            : repayValue;
    }

    /// @dev protected collateral is prioritized
    /// @param _borrowerProtectedAssets available users protected collateral
    function splitReceiveCollateralToLiquidate(uint256 _collateralToLiquidate, uint256 _borrowerProtectedAssets)
        internal
        pure
        returns (uint256 withdrawAssetsFromCollateral, uint256 withdrawAssetsFromProtected)
    {
        if (_collateralToLiquidate == 0) return (0, 0);

        unchecked {
            (
                withdrawAssetsFromCollateral, withdrawAssetsFromProtected
            ) = _collateralToLiquidate > _borrowerProtectedAssets
                // safe to uncheck because of above condition
                ? (_collateralToLiquidate - _borrowerProtectedAssets, _borrowerProtectedAssets)
                : (0, _collateralToLiquidate);
        }
    }

    /// @notice must stay private because this is not for general LTV, only for ltv after internally
    function _calculateLtvAfter(
        uint256 _sumOfCollateralValue,
        uint256 _totalDebtValue,
        uint256 _collateralValueToLiquidate,
        uint256 _debtValueToCover
    )
        private
        pure
        returns (uint256 ltvAfterLiquidation)
    {
        if (_sumOfCollateralValue <= _collateralValueToLiquidate || _totalDebtValue <= _debtValueToCover) {
            return 0;
        }

        unchecked { // all subs are safe because these values are chunks of total, so we will not underflow
            ltvAfterLiquidation = _ltvAfter(
                _sumOfCollateralValue - _collateralValueToLiquidate,
                _totalDebtValue - _debtValueToCover
            );
        }
    }

    /// @notice must stay private because this is not for general LTV, only for ltv after
    function _ltvAfter(uint256 _collateral, uint256 _debt) private pure returns (uint256 ltv) {
        // previous calculation of LTV
        ltv = _debt * _PRECISION_DECIMALS;
        ltv = Math.ceilDiv(ltv, _collateral); // Rounding.LTV is up/ceil
    }
}

// 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: 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) (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();
}

// 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: 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.Unsupported());
        if (flashloanFee == 0) return 0;

        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, debtAssets, rcomp, _daoFee, _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: 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
// 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
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);
}

{
  "remappings": [
    "forge-std/=gitmodules/forge-std/src/",
    "silo-foundry-utils/=gitmodules/silo-foundry-utils/contracts/",
    "properties/=gitmodules/crytic/properties/contracts/",
    "silo-core/=silo-core/",
    "silo-oracles/=silo-oracles/",
    "silo-vaults/=silo-vaults/",
    "ve-silo/=ve-silo/",
    "@openzeppelin/=gitmodules/openzeppelin-contracts-5/contracts/",
    "morpho-blue/=gitmodules/morpho-blue/src/",
    "openzeppelin5/=gitmodules/openzeppelin-contracts-5/contracts/",
    "openzeppelin5-upgradeable/=gitmodules/openzeppelin-contracts-upgradeable-5/contracts/",
    "chainlink/=gitmodules/chainlink/contracts/src/",
    "chainlink-ccip/=gitmodules/chainlink-ccip/contracts/src/",
    "uniswap/=gitmodules/uniswap/",
    "@uniswap/v3-core/=gitmodules/uniswap/v3-core/",
    "balancer-labs/v2-solidity-utils/=external/balancer-v2-monorepo/pkg/solidity-utils/contracts/",
    "balancer-labs/v2-interfaces/=external/balancer-v2-monorepo/pkg/interfaces/contracts/",
    "balancer-labs/v2-liquidity-mining/=external/balancer-v2-monorepo/pkg/liquidity-mining/contracts/",
    "@balancer-labs/=node_modules/@balancer-labs/",
    "@ensdomains/=node_modules/@ensdomains/",
    "@openzeppelin/contracts-upgradeable/=gitmodules/openzeppelin-contracts-upgradeable-5/contracts/",
    "@openzeppelin/contracts/=gitmodules/openzeppelin-contracts-5/contracts/",
    "@solidity-parser/=node_modules/@solidity-parser/",
    "ERC4626/=gitmodules/crytic/properties/lib/ERC4626/contracts/",
    "crytic/=gitmodules/crytic/",
    "ds-test/=gitmodules/openzeppelin-contracts-5/lib/forge-std/lib/ds-test/src/",
    "erc4626-tests/=gitmodules/openzeppelin-contracts-5/lib/erc4626-tests/",
    "halmos-cheatcodes/=gitmodules/morpho-blue/lib/halmos-cheatcodes/src/",
    "hardhat/=node_modules/hardhat/",
    "openzeppelin-contracts-5/=gitmodules/openzeppelin-contracts-5/",
    "openzeppelin-contracts-upgradeable-5/=gitmodules/openzeppelin-contracts-upgradeable-5/",
    "openzeppelin-contracts/=gitmodules/openzeppelin-contracts-upgradeable-5/lib/openzeppelin-contracts/",
    "prettier-plugin-solidity/=node_modules/prettier-plugin-solidity/",
    "proposals/=node_modules/proposals/",
    "solmate/=gitmodules/crytic/properties/lib/solmate/src/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "ipfs",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "cancun",
  "viaIR": false,
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[{"internalType":"address","name":"target","type":"address"}],"name":"AddressEmptyCode","type":"error"},{"inputs":[],"name":"AlreadyConfigured","type":"error"},{"inputs":[],"name":"CantRemoveActiveGauge","type":"error"},{"inputs":[],"name":"EmptyGaugeAddress","type":"error"},{"inputs":[],"name":"EmptySiloConfig","type":"error"},{"inputs":[],"name":"FailedCall","type":"error"},{"inputs":[],"name":"FullLiquidationRequired","type":"error"},{"inputs":[],"name":"GaugeAlreadyConfigured","type":"error"},{"inputs":[],"name":"GaugeIsNotConfigured","type":"error"},{"inputs":[{"internalType":"uint256","name":"balance","type":"uint256"},{"internalType":"uint256","name":"needed","type":"uint256"}],"name":"InsufficientBalance","type":"error"},{"inputs":[],"name":"InvalidInitialization","type":"error"},{"inputs":[],"name":"InvalidShareToken","type":"error"},{"inputs":[],"name":"NoDebtToCover","type":"error"},{"inputs":[],"name":"NoRepayAssets","type":"error"},{"inputs":[],"name":"NotInitializing","type":"error"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"OwnableInvalidOwner","type":"error"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"OwnableUnauthorizedAccount","type":"error"},{"inputs":[],"name":"OwnerIsZeroAddress","type":"error"},{"inputs":[],"name":"RequestNotSupported","type":"error"},{"inputs":[{"internalType":"address","name":"token","type":"address"}],"name":"SafeERC20FailedOperation","type":"error"},{"inputs":[],"name":"UnexpectedCollateralToken","type":"error"},{"inputs":[],"name":"UnexpectedDebtToken","type":"error"},{"inputs":[],"name":"UnknownRatio","type":"error"},{"inputs":[],"name":"UserIsSolvent","type":"error"},{"inputs":[],"name":"WrongGaugeShareToken","type":"error"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"gauge","type":"address"},{"indexed":false,"internalType":"address","name":"shareToken","type":"address"}],"name":"GaugeConfigured","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"shareToken","type":"address"}],"name":"GaugeRemoved","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"silo","type":"address"},{"indexed":false,"internalType":"uint24","name":"hooksBefore","type":"uint24"},{"indexed":false,"internalType":"uint24","name":"hooksAfter","type":"uint24"}],"name":"HookConfigured","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint64","name":"version","type":"uint64"}],"name":"Initialized","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"liquidator","type":"address"},{"indexed":true,"internalType":"address","name":"silo","type":"address"},{"indexed":true,"internalType":"address","name":"borrower","type":"address"},{"indexed":false,"internalType":"uint256","name":"repayDebtAssets","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"withdrawCollateral","type":"uint256"},{"indexed":false,"internalType":"bool","name":"receiveSToken","type":"bool"}],"name":"LiquidationCall","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferStarted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"inputs":[],"name":"acceptOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_silo","type":"address"},{"internalType":"uint256","name":"_action","type":"uint256"},{"internalType":"bytes","name":"_inputAndOutput","type":"bytes"}],"name":"afterAction","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"bytes","name":"","type":"bytes"}],"name":"beforeAction","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract IShareToken","name":"","type":"address"}],"name":"configuredGauges","outputs":[{"internalType":"contract IGaugeLike","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"gauge","outputs":[{"internalType":"contract IGaugeLike","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_silo","type":"address"}],"name":"hookReceiverConfig","outputs":[{"internalType":"uint24","name":"hooksBefore","type":"uint24"},{"internalType":"uint24","name":"hooksAfter","type":"uint24"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"contract ISiloConfig","name":"_siloConfig","type":"address"},{"internalType":"bytes","name":"_data","type":"bytes"}],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_collateralAsset","type":"address"},{"internalType":"address","name":"_debtAsset","type":"address"},{"internalType":"address","name":"_borrower","type":"address"},{"internalType":"uint256","name":"_maxDebtToCover","type":"uint256"},{"internalType":"bool","name":"_receiveSToken","type":"bool"}],"name":"liquidationCall","outputs":[{"internalType":"uint256","name":"withdrawCollateral","type":"uint256"},{"internalType":"uint256","name":"repayDebtAssets","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_borrower","type":"address"}],"name":"maxLiquidation","outputs":[{"internalType":"uint256","name":"collateralToLiquidate","type":"uint256"},{"internalType":"uint256","name":"debtToRepay","type":"uint256"},{"internalType":"bool","name":"sTokenRequired","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pendingOwner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"contract IShareToken","name":"_shareToken","type":"address"}],"name":"removeGauge","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract IGaugeLike","name":"_gauge","type":"address"},{"internalType":"contract IShareToken","name":"_shareToken","type":"address"}],"name":"setGauge","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"shareToken","outputs":[{"internalType":"contract IShareToken","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"siloConfig","outputs":[{"internalType":"contract ISiloConfig","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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