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// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity 0.8.20;

import {Operation, ChainCode} from "../contracts/Common.sol";
import {BaseSafeModule} from "../contracts/base/BaseSafeModule.sol";

import {FBTCGovernorModule} from "../contracts/FBTCGovernorModule.sol";

// For internal only usage.
contract FeeUpdaterModule is BaseSafeModule {
    bytes32 public constant FEE_UPDATER_ROLE = "1_fee_updater";

    address public fbtcModule;
    event FBTCModuleSet(address indexed _fbtcModule);
    event CrosschainFeeUpdated(bytes32 indexed chain, uint256 indexed _minFee);

    constructor(address _owner) {
        initialize(_owner);
    }

    function initialize(address _owner) public initializer {
        __BaseOwnableUpgradeable_init(_owner);
    }

    function setFBTCGovernorModule(address _fbtcModule) external onlyOwner {
        fbtcModule = _fbtcModule;
        emit FBTCModuleSet(_fbtcModule);
    }

    function updateCrossChainMinFee(
        bytes32 chain,
        uint256 _minFee
    ) external onlyRole(FEE_UPDATER_ROLE) {
        _call(
            fbtcModule,
            abi.encodeCall(
                FBTCGovernorModule(fbtcModule).updateCrossChainMinFee,
                (chain, _minFee)
            )
        );
        emit CrosschainFeeUpdated(chain, _minFee);
    }
}

// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity 0.8.20;

enum Operation {
    Nop, // starts from 1.
    Mint,
    Burn,
    CrosschainRequest,
    CrosschainConfirm
}

enum Status {
    Unused,
    Pending,
    Confirmed,
    Rejected
}

struct Request {
    Operation op;
    Status status;
    uint128 nonce; // Those can be packed into one slot in evm storage.
    bytes32 srcChain;
    bytes srcAddress;
    bytes32 dstChain;
    bytes dstAddress;
    uint256 amount; // Transfer value without fee.
    uint256 fee;
    bytes extra;
}

struct UserInfo {
    bool locked;
    string depositAddress;
    string withdrawalAddress;
}

library ChainCode {
    // For EVM chains, the chain code is chain id in bytes32 format.
    bytes32 constant ETH =
        0x0000000000000000000000000000000000000000000000000000000000000001;

    bytes32 constant MANTLE =
        0x0000000000000000000000000000000000000000000000000000000000001388;

    // Other chains.
    bytes32 constant BTC =
        0x0100000000000000000000000000000000000000000000000000000000000000;

    bytes32 constant SOLANA =
        0x0200000000000000000000000000000000000000000000000000000000000000;

    // For test.
    bytes32 constant XTN =
        0x0110000000000000000000000000000000000000000000000000000000000000;

    function getSelfChainCode() internal view returns (bytes32) {
        return bytes32(block.chainid);
    }
}

library RequestLib {
    /// @dev This request hash should be unique across all chains.
    ///                       op  nonce  srcChain  dstChain
    ///   (1) Mint:           1   nonce  BTC       chainid  ...
    ///   (2) Burn:           2   nonce  chainid   BTC      ...
    ///   (3) Cross:          3   nonce  chainid   dst      ...
    ///   (4) Cross confirm:  4   nonce  src       chainid  ...
    ///   On the same chain:
    ///       The `nonce` differs
    ///   On different chains:
    ///       The `chain.id` differs or the `op` differs
    function getRequestHash(
        Request memory r
    ) internal pure returns (bytes32 _hash) {
        _hash = keccak256(
            abi.encode(
                r.op,
                r.nonce,
                r.srcChain,
                r.srcAddress,
                r.dstChain,
                r.dstAddress,
                r.amount,
                r.fee,
                r.extra // For Burn, this should be none.
            )
        );
    }

    function getCrossSourceRequestHash(
        Request memory src
    ) internal pure returns (bytes32 _hash) {
        // Save.
        bytes memory extra = src.extra;
        // Set temperary data to calculate hash.
        src.op = Operation.CrosschainRequest;
        src.extra = ""; // clear
        _hash = getRequestHash(src);
        // Restore.
        src.op = Operation.CrosschainConfirm;
        src.extra = extra;
    }
}

// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity 0.8.20;

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

contract Enum {
    enum Operation {
        Call,
        DelegateCall
    }
}

interface ISafe {
    /// @dev Allows a Module to execute a Safe transaction without any further confirmations and return data
    function execTransactionFromModuleReturnData(
        address to,
        uint256 value,
        bytes memory data,
        Enum.Operation operation
    ) external returns (bool success, bytes memory returnData);
}

abstract contract BaseSafeModule is RoleBasedAccessControl {
    function _call(address _to, bytes memory _data) internal {
        (bool success, bytes memory _retData) = ISafe(safe())
            .execTransactionFromModuleReturnData(
                _to,
                0,
                _data,
                Enum.Operation.Call
            );
        if (!success) {
            assembly {
                let size := mload(_retData)
                revert(add(32, _retData), size)
            }
        }
    }

    function safe() public view returns (address) {
        return owner();
    }
}

// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity 0.8.20;

import {Operation, ChainCode} from "./Common.sol";
import {FBTC} from "./FBTC.sol";
import {FireBridge} from "./FireBridge.sol";
import {FeeModel} from "./FeeModel.sol";
import {BaseSafeModule} from "./base/BaseSafeModule.sol";

contract FBTCGovernorModule is BaseSafeModule {
    bytes32 public constant FBTC_PAUSER_ROLE = "1_fbtc_pauser";
    bytes32 public constant LOCKER_ROLE = "2_fbtc_locker";
    bytes32 public constant BRIDGE_PAUSER_ROLE = "3_bridge_pauser";
    bytes32 public constant USER_MANAGER_ROLE = "4_bridge_user_manager";
    bytes32 public constant CHAIN_MANAGER_ROLE = "5_bridge_chain_manager";
    bytes32 public constant FEE_UPDATER_ROLE = "6_bridge_fee_updater";

    FBTC public fbtc;
    uint256 public maxCrossChainMinFee;
    uint256 public maxUserBurnMinFee;
    uint256 public maxUserBurnFeeRate;

    event FBTCSet(address indexed _fbtc);
    event MaxCrossChainMinFeeSet(uint256 indexed _maxCrossChainMinFee);
    event MaxUserBurnMinFeeSet(uint256 indexed _maxUserBurnMinFee);
    event MaxUserBurnFeeRateSet(uint256 indexed _maxUserBurnFeeRate);

    constructor(address _owner, address _fbtc) {
        initialize(_owner, _fbtc);
    }

    function initialize(address _owner, address _fbtc) public initializer {
        __BaseOwnableUpgradeable_init(_owner);
        fbtc = FBTC(_fbtc);
        maxCrossChainMinFee = 0.03 * 1e8; // 0.03 FBTC
        maxUserBurnMinFee = 0.03 * 1e8; // 0.03 FBTC
        maxUserBurnFeeRate = (2 * 1_000_000) / 1000; // 0.2%
    }

    function bridge() public view returns (FireBridge _bridge) {
        _bridge = FireBridge(fbtc.bridge());
    }

    function feeModel() public view returns (FeeModel _feeModel) {
        _feeModel = FeeModel(bridge().feeModel());
    }

    // Admin methods.
    function setFBTC(address _fbtc) external onlyOwner {
        fbtc = FBTC(_fbtc);
        emit FBTCSet(_fbtc);
    }

    function setMaxCrossChainMinFee(
        uint256 _maxCrossChainMinFee
    ) external onlyOwner {
        maxCrossChainMinFee = _maxCrossChainMinFee;
        emit MaxCrossChainMinFeeSet(_maxCrossChainMinFee);
    }

    function setMaxUserBurnMinFee(
        uint256 _maxUserBurnMinFee
    ) external onlyOwner {
        maxUserBurnMinFee = _maxUserBurnMinFee;
        emit MaxUserBurnMinFeeSet(_maxUserBurnMinFee);
    }

    function setMaxUserBurnFeeRate(
        uint256 _maxUserBurnFeeRate
    ) external onlyOwner {
        maxUserBurnFeeRate = _maxUserBurnFeeRate;
        emit MaxUserBurnFeeRateSet(_maxUserBurnFeeRate);
    }

    // Operator methods.
    function lockUserFBTCTransfer(
        address _user
    ) external onlyRole(LOCKER_ROLE) {
        _call(address(fbtc), abi.encodeCall(fbtc.lockUser, (_user)));
    }

    function pauseFBTC() external onlyRole(FBTC_PAUSER_ROLE) {
        _call(address(fbtc), abi.encodeCall(fbtc.pause, ()));
    }

    function pauseBridge() external onlyRole(BRIDGE_PAUSER_ROLE) {
        FireBridge _bridge = bridge();
        _call(address(_bridge), abi.encodeCall(_bridge.pause, ()));
    }

    function addQualifiedUser(
        address _qualifiedUser,
        string calldata _depositAddress,
        string calldata _withdrawalAddress
    ) external onlyRole(USER_MANAGER_ROLE) {
        FireBridge _bridge = bridge();
        _call(
            address(_bridge),
            abi.encodeCall(
                _bridge.addQualifiedUser,
                (_qualifiedUser, _depositAddress, _withdrawalAddress)
            )
        );
    }

    function lockQualifiedUser(
        address _qualifiedUser
    ) external onlyRole(USER_MANAGER_ROLE) {
        FireBridge _bridge = bridge();
        _call(
            address(_bridge),
            abi.encodeCall(_bridge.lockQualifiedUser, (_qualifiedUser))
        );
    }

    function addDstChains(
        bytes32[] memory _dstChains
    ) external onlyRole(CHAIN_MANAGER_ROLE) {
        FireBridge _bridge = bridge();
        _call(
            address(_bridge),
            abi.encodeCall(_bridge.addDstChains, (_dstChains))
        );
    }

    function removeDstChains(
        bytes32[] memory _dstChains
    ) external onlyRole(CHAIN_MANAGER_ROLE) {
        FireBridge _bridge = bridge();
        _call(
            address(_bridge),
            abi.encodeCall(_bridge.removeDstChains, (_dstChains))
        );
    }

    function updateCrossChainMinFee(
        bytes32 _chain,
        uint256 _minFee
    ) external onlyRole(FEE_UPDATER_ROLE) {
        require(
            _minFee <= maxCrossChainMinFee,
            "Min fee exceeds maxCrossChainMinFee"
        );

        // Copy the config set by admin.
        FeeModel _feeModel = feeModel();
        FeeModel.FeeConfig memory config;
        try _feeModel.getCrosschainFeeConfig(_chain) returns (
            FeeModel.FeeConfig memory _config
        ) {
            config = _config;
        } catch {
            // If no CrosschainFeeConfig is set, get the default one.
            config = _feeModel.getDefaultFeeConfig(Operation.CrosschainRequest);
        }
        // Update minFee.
        config.minFee = _minFee;

        _call(
            address(_feeModel),
            abi.encodeCall(_feeModel.setCrosschainFeeConfig, (_chain, config))
        );
    }

    function updateUserBurnFee(
        address _user,
        FeeModel.FeeConfig calldata _config
    ) external onlyRole(USER_MANAGER_ROLE) {
        require(
            _config.minFee <= maxUserBurnMinFee,
            "Min fee exceeds maxUserBurnMinFee"
        );
        for (uint i = 0; i < _config.tiers.length; i++) {
            FeeModel.FeeTier calldata tier = _config.tiers[i];
            require(
                tier.feeRate <= maxUserBurnFeeRate,
                "Fee rate exceeds maxUserBurnFeeRate"
            );
        }
        FeeModel _feeModel = feeModel();
        _call(
            address(_feeModel),
            abi.encodeCall(_feeModel.setUserBurnFeeConfig, (_user, _config))
        );
    }
}

// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity 0.8.20;

import {EnumerableSet} from "@openzeppelin/contracts/utils/structs/EnumerableSet.sol";
import {BaseOwnableUpgradeable} from "./BaseOwnableUpgradeable.sol";

/// @dev A simple RoleBasedAccessControl module modified from
///    https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/access/AccessControl.sol
///    https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/access/extensions/AccessControlEnumerable.sol
abstract contract RoleBasedAccessControl is BaseOwnableUpgradeable {
    using EnumerableSet for EnumerableSet.AddressSet;

    mapping(bytes32 role => EnumerableSet.AddressSet) private _roleMembers;

    event RoleGranted(bytes32 indexed role, address indexed account);
    event RoleRevoked(bytes32 indexed role, address indexed account);

    modifier onlyRole(bytes32 role) {
        require(hasRole(role, msg.sender), "Unauthorized role member");
        _;
    }

    function _grantRole(bytes32 role, address account) internal {
        if (_roleMembers[role].add(account)) {
            emit RoleGranted(role, account);
        }
    }

    function _revokeRole(bytes32 role, address account) internal {
        if (_roleMembers[role].remove(account)) {
            emit RoleRevoked(role, account);
        }
    }

    function grantRole(bytes32 role, address account) external onlyOwner {
        _grantRole(role, account);
    }

    function revokeRole(bytes32 role, address account) external onlyOwner {
        _revokeRole(role, account);
    }

    function hasRole(bytes32 role, address account) public view returns (bool) {
        return _roleMembers[role].contains(account);
    }

    function getRoleMember(
        bytes32 role,
        uint256 index
    ) external view returns (address) {
        return _roleMembers[role].at(index);
    }

    function getRoleMemberCount(bytes32 role) external view returns (uint256) {
        return _roleMembers[role].length();
    }

    function getRoleMembers(
        bytes32 role
    ) external view returns (address[] memory) {
        return _roleMembers[role].values();
    }
}

// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity 0.8.20;

import {FToken} from "./base/FToken.sol";

contract FBTC is FToken {
    constructor(address _owner, address _bridge) {
        initialize(_owner, _bridge);
    }

    function initialize(address _owner, address _bridge) public initializer {
        __FToken_init(_owner, _bridge, "Fire Bitcoin", "FBTC");
    }

    function decimals() public pure override returns (uint8) {
        return 8;
    }
}

// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity 0.8.20;

import "@openzeppelin/contracts/utils/structs/EnumerableSet.sol";

import {Request, UserInfo, RequestLib, Operation, Status, ChainCode} from "./Common.sol";
import {BridgeStorage} from "./base/BridgeStorage.sol";
import {FToken} from "./base/FToken.sol";
import {BasePausableUpgradeable} from "./base/BasePausableUpgradeable.sol";
import {FeeModel} from "./FeeModel.sol";

contract FireBridge is BridgeStorage, BasePausableUpgradeable {
    using RequestLib for Request;
    using EnumerableSet for EnumerableSet.AddressSet;
    using EnumerableSet for EnumerableSet.Bytes32Set;

    event QualifiedUserAdded(
        address indexed _user,
        string _depositAddress,
        string _withdrawalAddress
    );
    event QualifiedUserEdited(
        address indexed _user,
        string _depositAddress,
        string _withdrawalAddress
    );
    event QualifiedUserLocked(address indexed _user);
    event QualifiedUserUnlocked(address indexed _user);

    event QualifiedUserRemoved(address indexed _user);

    event TokenSet(address indexed _token);
    event MinterSet(address indexed _minter);
    event FeeModelSet(address indexed _feeModel);
    event FeeRecipientSet(address indexed _feeRecipient);
    event DepositTxBlocked(
        bytes32 indexed _depositTxid,
        uint256 indexed _outputIndex
    );

    event RequestAdded(bytes32 indexed _hash, Operation indexed op, Request _r);
    event RequestConfirmed(bytes32 indexed _hash);

    event FeePaid(address indexed _feeRecipient, uint256 indexed _feeAmount);

    event DstChainAdded(bytes32 indexed _dstChain);
    event DstChainRemoved(bytes32 indexed _dstChain);

    modifier onlyMinter() {
        require(msg.sender == minter, "Caller not minter");
        _;
    }

    modifier onlyActiveQualifiedUser() {
        require(isQualifiedUser(msg.sender), "Caller not qualified");
        require(!userInfo[msg.sender].locked, "Caller locked");
        _;
    }

    bytes32 public immutable MAIN_CHAIN;

    constructor(address _owner, bytes32 _mainChain) {
        initialize(_owner);
        MAIN_CHAIN = _mainChain;
    }

    function initialize(address _owner) public initializer {
        __BasePausableUpgradeable_init(_owner);
    }

    function _splitFeeAndUpdate(Request memory r) internal view {
        uint256 _fee = FeeModel(feeModel).getFee(r);
        r.fee = _fee;
        r.amount = r.amount - _fee;
    }

    function _payFee(uint256 _fee, bool viaMint) internal {
        if (_fee == 0) return;

        address _feeRecipient = feeRecipient;
        if (viaMint) {
            FToken(fbtc).mint(_feeRecipient, _fee);
        } else {
            FToken(fbtc).payFee(msg.sender, _feeRecipient, _fee);
        }
        emit FeePaid(_feeRecipient, _fee);
    }

    function _addRequest(Request memory r) internal returns (bytes32 _hash) {
        require(
            r.nonce == requestHashes.length,
            "Fatal: nonce not equals array length"
        ); // Should never happen.
        _hash = r.getRequestHash();

        // For CrosschainRequest: update extra with self hash.
        if (r.op == Operation.CrosschainRequest) {
            r.extra = abi.encode(_hash);
        }
        requestHashes.push(_hash);
        requests[_hash] = r;
        emit RequestAdded(_hash, r.op, r);
    }

    /// Owner methods.

    /// Qualified user management.
    function addQualifiedUser(
        address _user,
        string calldata _depositAddress,
        string calldata _withdrawalAddress
    ) external onlyOwner {
        require(qualifiedUsers.add(_user), "User already qualified");
        require(
            depositAddressToUser[_depositAddress] == address(0),
            "Deposit address used"
        );
        userInfo[_user] = UserInfo(false, _depositAddress, _withdrawalAddress);
        depositAddressToUser[_depositAddress] = _user;
        emit QualifiedUserAdded(_user, _depositAddress, _withdrawalAddress);
    }

    function editQualifiedUser(
        address _user,
        string calldata _depositAddress,
        string calldata _withdrawalAddress
    ) external onlyOwner {
        require(isQualifiedUser(_user), "User not qualified");
        require(!userInfo[_user].locked, "User locked");

        string memory _oldDepositAddress = userInfo[_user].depositAddress;
        if (
            keccak256(bytes(_depositAddress)) !=
            keccak256(bytes(_oldDepositAddress))
        ) {
            require(
                depositAddressToUser[_depositAddress] == address(0),
                "Deposit address used"
            );
            delete depositAddressToUser[_oldDepositAddress];
            userInfo[_user].depositAddress = _depositAddress;
            depositAddressToUser[_depositAddress] = _user;
        }

        userInfo[_user].withdrawalAddress = _withdrawalAddress;
        emit QualifiedUserEdited(_user, _depositAddress, _withdrawalAddress);
    }

    function removeQualifiedUser(address _qualifiedUser) external onlyOwner {
        require(qualifiedUsers.remove(_qualifiedUser), "User not qualified");
        string memory _depositAddress = userInfo[_qualifiedUser].depositAddress;
        delete depositAddressToUser[_depositAddress];
        delete userInfo[_qualifiedUser];
        emit QualifiedUserRemoved(_qualifiedUser);
    }

    function lockQualifiedUser(address _qualifiedUser) external onlyOwner {
        require(isQualifiedUser(_qualifiedUser), "User not qualified");
        require(!userInfo[_qualifiedUser].locked, "User already locked");
        userInfo[_qualifiedUser].locked = true;
        emit QualifiedUserLocked(_qualifiedUser);
    }

    function unlockQualifiedUser(address _qualifiedUser) external onlyOwner {
        require(isQualifiedUser(_qualifiedUser), "User not qualified");
        require(userInfo[_qualifiedUser].locked, "User not locked");
        userInfo[_qualifiedUser].locked = false;
        emit QualifiedUserUnlocked(_qualifiedUser);
    }

    /// Protocol configuration.
    function setToken(address _token) external onlyOwner {
        fbtc = _token;
        emit TokenSet(_token);
    }

    function setMinter(address _minter) external onlyOwner {
        minter = _minter;
        emit MinterSet(_minter);
    }

    function setFeeModel(address _feeModel) external onlyOwner {
        require(_feeModel != address(0), "Invalid feeModel");
        feeModel = _feeModel;
        emit FeeModelSet(_feeModel);
    }

    function setFeeRecipient(address _feeRecipient) external onlyOwner {
        require(_feeRecipient != address(0), "Invalid feeRecipient");
        feeRecipient = _feeRecipient;
        emit FeeRecipientSet(_feeRecipient);
    }

    function addDstChains(bytes32[] memory _dstChains) external onlyOwner {
        for (uint i = 0; i < _dstChains.length; i++) {
            bytes32 _dstChain = _dstChains[i];
            require(
                _dstChain != MAIN_CHAIN && _dstChain != chain(),
                "Invalid dst chain"
            );
            if (dstChains.add(_dstChain)) {
                emit DstChainAdded(_dstChain);
            }
        }
    }

    function removeDstChains(bytes32[] memory _dstChains) external onlyOwner {
        for (uint i = 0; i < _dstChains.length; i++) {
            bytes32 _dstChain = _dstChains[i];
            if (dstChains.remove(_dstChain)) {
                emit DstChainRemoved(_dstChain);
            }
        }
    }

    /// @notice Mark the deposit tx invalid and reject the minting request if any.
    function blockDepositTx(
        bytes32 _depositTxid,
        uint256 _outputIndex
    ) external onlyOwner {
        bytes32 REJECTED = bytes32(uint256(0xdead));
        bytes memory _depositTxData = abi.encode(_depositTxid, _outputIndex);
        bytes32 depositDataHash = keccak256(_depositTxData);

        bytes32 requestHash = usedDepositTxs[depositDataHash];
        require(requestHash == bytes32(0), "Already confirmed or blocked");

        // Mark it as rejected.
        usedDepositTxs[depositDataHash] = REJECTED;
        emit DepositTxBlocked(_depositTxid, _outputIndex);
    }

    /// QualifiedUser methods.

    /// @notice Initiate a FBTC minting request for the qualifiedUser.
    /// @param _amount The amount of FBTC to mint.
    /// @param _depositTxid The BTC deposit txid
    /// @param _outputIndex The transaction output index to user's deposit address.
    /// @return _hash The hash of the new created request.
    /// @return _r The full new created request.
    function addMintRequest(
        uint256 _amount,
        bytes32 _depositTxid,
        uint256 _outputIndex
    )
        external
        onlyActiveQualifiedUser
        whenNotPaused
        returns (bytes32 _hash, Request memory _r)
    {
        // Check request.
        require(_amount > 0, "Invalid amount");
        require(uint256(_depositTxid) != 0, "Empty deposit txid");
        bytes memory _depositTxData = abi.encode(_depositTxid, _outputIndex);

        bytes32 depositDataHash = keccak256(_depositTxData);
        require(
            usedDepositTxs[depositDataHash] == bytes32(uint256(0)),
            "Used BTC deposit tx"
        );

        // Compose request. Main -> Self
        _r = Request({
            nonce: nonce(),
            op: Operation.Mint,
            srcChain: MAIN_CHAIN,
            srcAddress: bytes(userInfo[msg.sender].depositAddress),
            dstChain: chain(),
            dstAddress: abi.encode(msg.sender),
            amount: _amount,
            fee: 0, // To be set in `_splitFeeAndUpdate`
            extra: _depositTxData,
            status: Status.Pending
        });

        // Split fee.
        _splitFeeAndUpdate(_r);

        // Save request.
        _hash = _addRequest(_r);
    }

    /// @notice Initiate a FBTC burning request for the qualifiedUser.
    /// @param _amount The amount of FBTC to burn.
    /// @return _hash The hash of the new created request.
    /// @return _r The full new created request.
    function addBurnRequest(
        uint256 _amount
    )
        external
        onlyActiveQualifiedUser
        whenNotPaused
        returns (bytes32 _hash, Request memory _r)
    {
        // Check request.
        require(_amount > 0, "Invalid amount");

        // Compose request. Self -> Main
        _r = Request({
            nonce: nonce(),
            op: Operation.Burn,
            srcChain: chain(),
            srcAddress: abi.encode(msg.sender),
            dstChain: MAIN_CHAIN,
            dstAddress: bytes(userInfo[msg.sender].withdrawalAddress),
            amount: _amount,
            fee: 0, // To be set in `_splitFeeAndUpdate`
            extra: "", // Unset until confirmed
            status: Status.Pending
        });

        // Split fee.
        _splitFeeAndUpdate(_r);

        // Save request.
        _hash = _addRequest(_r);

        // Pay fee
        _payFee(_r.fee, false);

        // Burn tokens.
        FToken(fbtc).burn(msg.sender, _r.amount);
    }

    /// Customer methods.

    /// @notice Initiate a FBTC cross-chain bridging request.
    /// @param _targetChain The target chain identifier.
    /// @param _targetAddress The encoded address on the target chain .
    /// @param _amount The amount of FBTC to cross-chain.
    /// @return _hash The hash of the new created request.
    /// @return _r The full new created request.
    function addCrosschainRequest(
        bytes32 _targetChain,
        bytes memory _targetAddress,
        uint256 _amount
    ) public whenNotPaused returns (bytes32 _hash, Request memory _r) {
        // Check request.
        require(_amount > 0, "Invalid amount");
        require(dstChains.contains(_targetChain), "Target chain not allowed");

        // Compose request. Self -> Target
        _r = Request({
            nonce: nonce(),
            op: Operation.CrosschainRequest,
            srcChain: chain(),
            srcAddress: abi.encode(msg.sender),
            amount: _amount,
            dstChain: _targetChain,
            dstAddress: _targetAddress,
            fee: 0,
            extra: "", // Not include in hash.
            status: Status.Unused // Not used.
        });

        // Split fee.
        _splitFeeAndUpdate(_r);

        // Save request.
        _hash = _addRequest(_r);

        // Pay fee
        _payFee(_r.fee, false);

        // Burn tokens.
        FToken(fbtc).burn(msg.sender, _r.amount);
    }

    /// @notice A more user-friendly interface to cross-chain to an
    ///         EVM-compatible target chain.
    /// @param _targetChainId The chain id of target EVM chain.
    /// @param _targetAddress The target EVM address.
    /// @param _amount The amount of FBTC to cross-chain.
    /// @return _hash The hash of the new created request.
    /// @return _r The full new created request.
    function addEVMCrosschainRequest(
        uint256 _targetChainId,
        address _targetAddress,
        uint256 _amount
    ) external returns (bytes32 _hash, Request memory _r) {
        return
            addCrosschainRequest(
                bytes32(_targetChainId),
                abi.encode(_targetAddress),
                _amount
            );
    }

    /// Minter methods.

    /// @notice Confirm the minting request.
    /// @param _hash The minting request hash.
    function confirmMintRequest(
        bytes32 _hash
    ) external onlyMinter whenNotPaused {
        // Check request.
        Request storage r = requests[_hash];
        require(r.op == Operation.Mint, "Not Mint request");

        uint256 _amount = r.amount;
        require(_amount > 0, "Invalid request amount");
        require(r.status == Status.Pending, "Invalid request status");

        // Check and update deposit data usage status.
        bytes32 depositDataHash = keccak256(r.extra);
        require(
            usedDepositTxs[depositDataHash] == bytes32(uint256(0)),
            "Used BTC deposit tx"
        );
        usedDepositTxs[depositDataHash] = _hash;

        // Update status.
        r.status = Status.Confirmed;
        emit RequestConfirmed(_hash);

        // Mint tokens
        FToken(fbtc).mint(abi.decode(r.dstAddress, (address)), _amount);

        // Pay fee.
        _payFee(r.fee, true);
    }

    /// @notice Confirm the burning request.
    /// @param _hash The burning request id.
    /// @param _withdrawalTxid The BTC withdrawal txid
    /// @param _outputIndex The transaction output index to user's withdrawal address.
    function confirmBurnRequest(
        bytes32 _hash,
        bytes32 _withdrawalTxid,
        uint256 _outputIndex
    ) external onlyMinter whenNotPaused {
        // Check request.
        require(uint256(_withdrawalTxid) != 0, "Empty withdraw txid");

        Request storage r = requests[_hash];

        require(r.op == Operation.Burn, "Not Burn request");
        require(r.amount > 0, "Invalid request amount");
        require(r.status == Status.Pending, "Invalid request status");

        bytes memory _withdrawalTxData = abi.encode(
            _withdrawalTxid,
            _outputIndex
        );

        bytes32 _withdrawalDataHash = keccak256(_withdrawalTxData);
        require(
            usedWithdrawalTxs[_withdrawalDataHash] == bytes32(uint256(0)),
            "Used BTC withdrawal tx"
        );
        usedWithdrawalTxs[_withdrawalDataHash] = _hash;

        // Update status.
        r.status = Status.Confirmed;
        r.extra = _withdrawalTxData;

        emit RequestConfirmed(_hash);
    }

    /// @notice Confirm the cross-chain request.
    /// @dev Most fields of the request should be the same as the one on
    ///      source chain. Note:
    ///       1. The `op` is changed to `CrosschainConfirm`
    ///       2. The `nonce` is the source nonce, used to calculate source request hash.
    ///       3. The `status` should be `Unused` (0).
    ///       4. The `extra` should be 32 bytes length and contain the source request hash.
    /// @param r The full cross-chain request.
    function confirmCrosschainRequest(
        Request memory r
    ) external onlyMinter whenNotPaused {
        // Check request.
        require(r.amount > 0, "Invalid request amount");
        require(r.dstChain == chain(), "Dst chain not match");
        require(
            r.op == Operation.CrosschainConfirm,
            "Not CrosschainConfirm request"
        );
        require(r.status == Status.Unused, "Status should not be used");

        require(r.extra.length == 32, "Invalid extra: not valid bytes32");
        require(
            r.dstAddress.length == 32,
            "Invalid dstAddress: not 32 bytes length"
        );
        require(
            abi.decode(r.dstAddress, (uint256)) <= type(uint160).max,
            "Invalid dstAddress: not address"
        );

        bytes32 srcHash = abi.decode(r.extra, (bytes32));

        // Set to request to calc hash.
        require(
            r.getCrossSourceRequestHash() == srcHash,
            "Source request hash is incorrect"
        );
        require(
            crosschainRequestConfirmation[srcHash] == bytes32(0),
            "Source request already confirmed"
        );

        // Save request.
        r.nonce = nonce(); // Override src nonce to dst nonce.
        bytes32 _dsthash = _addRequest(r);
        crosschainRequestConfirmation[srcHash] = _dsthash;

        // Mint tokens.
        FToken(fbtc).mint(abi.decode(r.dstAddress, (address)), r.amount);
    }

    /// View functions.

    /// @notice The unique chain identifier in FBTC system.
    function chain() public view returns (bytes32) {
        return ChainCode.getSelfChainCode();
    }

    /// @notice The next request id
    function nonce() public view returns (uint128) {
        require(
            requestHashes.length < type(uint128).max,
            "Fatal: nonce overflow"
        ); // Unlikely happens.
        return uint128(requestHashes.length);
    }

    /// @notice Check whether the address is qualified
    function isQualifiedUser(address _user) public view returns (bool) {
        return qualifiedUsers.contains(_user);
    }

    /// @notice Check whether the address is qualified and active
    function isActiveUser(address _user) public view returns (bool) {
        return isQualifiedUser(_user) && !userInfo[_user].locked;
    }

    /// @notice Get all qualified users
    function getQualifiedUsers() external view returns (address[] memory) {
        return qualifiedUsers.values();
    }

    /// @notice Get all active users
    function getActiveUsers() external view returns (address[] memory _users) {
        uint256 activeCount = 0;
        for (uint256 i = 0; i < qualifiedUsers.length(); ++i) {
            UserInfo storage info = userInfo[qualifiedUsers.at(i)];
            if (!info.locked) {
                activeCount += 1;
            }
        }

        _users = new address[](activeCount);
        uint256 j = 0;
        for (uint256 i = 0; i < qualifiedUsers.length(); ++i) {
            address _user = qualifiedUsers.at(i);
            UserInfo storage info = userInfo[_user];
            if (!info.locked) {
                _users[j++] = _user;
            }
        }
    }

    /// @notice Get qualified user information.
    function getQualifiedUserInfo(
        address _user
    ) external view returns (UserInfo memory info) {
        info = userInfo[_user];
    }

    /// @notice Get qualified user information.
    function getValidDstChains() external view returns (bytes32[] memory) {
        return dstChains.values();
    }

    /// @notice Get request by the index a.k.a the id.
    /// @param _id The index.
    /// @return r The returned request.
    function getRequestById(
        uint256 _id
    ) external view returns (Request memory r) {
        require(_id < requestHashes.length, "Request not exists");
        r = requests[requestHashes[_id]];
    }

    /// @notice Get multiple requests by an id range.
    /// @param _start The start index.
    /// @param _end The end index.
    /// @return rs The returned requests.
    function getRequestsByIdRange(
        uint256 _start,
        uint256 _end
    ) external view returns (Request[] memory rs) {
        uint256 maxIndex = requestHashes.length - 1;
        if (_end > maxIndex) _end = maxIndex;
        require(_start <= _end, "start should <= end");
        uint256 len = _end - _start + 1;
        rs = new Request[](len);
        for (uint i = 0; i < len; i++) {
            rs[i] = requests[requestHashes[i + _start]];
        }
    }

    /// @notice Get request by hash
    /// @param _hash The hash
    /// @return r The returned request.
    function getRequestByHash(
        bytes32 _hash
    ) public view returns (Request memory r) {
        r = requests[_hash];
        require(r.op != Operation.Nop, "Request not exists");
    }

    /// @notice Get multiple requests by hashes.
    /// @param _hashes The hash list
    /// @return rs The returned requests.
    function getRequestsByHashes(
        bytes32[] calldata _hashes
    ) external view returns (Request[] memory rs) {
        rs = new Request[](_hashes.length);
        for (uint i = 0; i < _hashes.length; i++) {
            rs[i] = getRequestByHash(_hashes[i]);
        }
    }

    /// @notice Calculate hash of the request.
    /// @param _r The Request to hash
    /// @return _hash The hash result
    function calculateRequestHash(
        Request memory _r
    ) external pure returns (bytes32 _hash) {
        _hash = _r.getRequestHash();
    }
}

// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity 0.8.20;

import {Operation, Request} from "./Common.sol";
import {BaseOwnableUpgradeable} from "./base/BaseOwnableUpgradeable.sol";

contract FeeModel is BaseOwnableUpgradeable {
    uint32 public constant FEE_RATE_BASE = 1_000_000;

    struct FeeTier {
        uint224 amountTier; // Amount tier.
        uint32 feeRate; // Fee rate.
    }

    struct FeeConfig {
        uint256 maxFee; // Maximum fee.
        uint256 minFee; // Minimum fee.
        FeeTier[] tiers; // Order by amount asc.
    }

    mapping(Operation op => FeeConfig cfg) defaultFeeConfig;
    mapping(bytes32 dstChain => FeeConfig cfg) crosschainFeeConfig;
    mapping(address user => FeeConfig cfg) userBurnFeeConfig;

    event DefaultFeeConfigSet(Operation indexed _op, FeeConfig _config);
    event CrosschainFeeConfigSet(bytes32 indexed _chain, FeeConfig _config);
    event UserBurnFeeConfigSet(address indexed _user, FeeConfig _config);

    constructor(address _owner) {
        initialize(_owner);
    }

    function initialize(address _owner) public initializer {
        __BaseOwnableUpgradeable_init(_owner);
    }

    function _validateOp(Operation op) internal pure {
        require(
            op == Operation.Mint ||
                op == Operation.Burn ||
                op == Operation.CrosschainRequest,
            "Invalid op"
        );
    }

    function _getFee(
        uint256 _amount,
        FeeConfig storage _config
    ) internal view returns (uint256 _fee) {
        uint256 minFee = _config.minFee;
        require(minFee < _amount, "amount lower than minimal fee");

        uint256 length = _config.tiers.length;
        require(length > 0, "Empty fee config");

        for (uint i = 0; i < length; i++) {
            FeeTier storage tier = _config.tiers[i];
            if (i == length - 1 || _amount < uint256(tier.amountTier)) {
                // Note: Use `<` instead of `<=`, the border is not included.
                _fee = (uint256(tier.feeRate) * _amount) / FEE_RATE_BASE;
                break;
            }
        }

        // Cap the fee.
        if (_fee < minFee) {
            _fee = minFee;
        }

        uint256 maxFee = _config.maxFee;
        if (_fee > maxFee) {
            _fee = maxFee;
        }
    }

    function _validateConfig(FeeConfig calldata _config) internal pure {
        uint224 prevAmount = 0;
        require(
            _config.minFee <= 0.03 * 1e8,
            "Minimium fee should not exceed 0.03 FBTC"
        );
        require(
            _config.minFee <= _config.maxFee,
            "Minimium fee should not exceed maximum fee"
        );

        require(_config.tiers.length > 0, "Empty fee config");

        for (uint i = 0; i < _config.tiers.length; i++) {
            FeeTier calldata tier = _config.tiers[i];

            uint224 amount = tier.amountTier;
            require(amount >= prevAmount, "Tiers not in order");
            prevAmount = amount;

            require(
                tier.feeRate <= FEE_RATE_BASE / 100,
                "Fee rate too high, > 1%"
            );
            if (i == _config.tiers.length - 1) {
                require(
                    amount == type(uint224).max,
                    "The last tier should be uint224.max"
                );
            }
        }
    }

    function setDefaultFeeConfig(
        Operation _op,
        FeeConfig calldata _config
    ) external onlyOwner {
        _validateOp(_op);
        _validateConfig(_config);
        defaultFeeConfig[_op] = _config;
        emit DefaultFeeConfigSet(_op, _config);
    }

    function setCrosschainFeeConfig(
        bytes32 _dstChain,
        FeeConfig calldata _config
    ) external onlyOwner {
        _validateConfig(_config);
        crosschainFeeConfig[_dstChain] = _config;
        emit CrosschainFeeConfigSet(_dstChain, _config);
    }

    function setUserBurnFeeConfig(
        address _user,
        FeeConfig calldata _config
    ) external onlyOwner {
        _validateConfig(_config);
        userBurnFeeConfig[_user] = _config;
        emit UserBurnFeeConfigSet(_user, _config);
    }

    // View functions.

    function getFee(Request calldata r) external view returns (uint256 _fee) {
        _validateOp(r.op);
        FeeConfig storage _config;
        if (r.op == Operation.CrosschainRequest) {
            _config = crosschainFeeConfig[r.dstChain];
            if (_config.tiers.length > 0) return _getFee(r.amount, _config);
        } else if (r.op == Operation.Burn) {
            address _user = abi.decode(r.srcAddress, (address));
            _config = userBurnFeeConfig[_user];
            if (_config.tiers.length > 0) return _getFee(r.amount, _config);
        }
        _config = defaultFeeConfig[r.op];
        if (_config.tiers.length > 0) return _getFee(r.amount, _config);
        revert("Fee config not set");
    }

    function getDefaultFeeConfig(
        Operation _op
    ) external view returns (FeeConfig memory _config) {
        _config = defaultFeeConfig[_op];
        require(_config.tiers.length > 0, "Fee config not set");
    }

    function getCrosschainFeeConfig(
        bytes32 _dstChain
    ) external view returns (FeeConfig memory _config) {
        _config = crosschainFeeConfig[_dstChain];
        require(_config.tiers.length > 0, "Fee config not set");
    }

    function getUserBurnFeeConfig(
        address _user
    ) external view returns (FeeConfig memory _config) {
        _config = userBurnFeeConfig[_user];
        require(_config.tiers.length > 0, "Fee config not set");
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/structs/EnumerableSet.sol)
// This file was procedurally generated from scripts/generate/templates/EnumerableSet.js.

pragma solidity ^0.8.20;

/**
 * @dev Library for managing
 * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
 * types.
 *
 * Sets have the following properties:
 *
 * - Elements are added, removed, and checked for existence in constant time
 * (O(1)).
 * - Elements are enumerated in O(n). No guarantees are made on the ordering.
 *
 * ```solidity
 * contract Example {
 *     // Add the library methods
 *     using EnumerableSet for EnumerableSet.AddressSet;
 *
 *     // Declare a set state variable
 *     EnumerableSet.AddressSet private mySet;
 * }
 * ```
 *
 * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
 * and `uint256` (`UintSet`) are supported.
 *
 * [WARNING]
 * ====
 * Trying to delete such a structure from storage will likely result in data corruption, rendering the structure
 * unusable.
 * See https://github.com/ethereum/solidity/pull/11843[ethereum/solidity#11843] for more info.
 *
 * In order to clean an EnumerableSet, you can either remove all elements one by one or create a fresh instance using an
 * array of EnumerableSet.
 * ====
 */
library EnumerableSet {
    // To implement this library for multiple types with as little code
    // repetition as possible, we write it in terms of a generic Set type with
    // bytes32 values.
    // The Set implementation uses private functions, and user-facing
    // implementations (such as AddressSet) are just wrappers around the
    // underlying Set.
    // This means that we can only create new EnumerableSets for types that fit
    // in bytes32.

    struct Set {
        // Storage of set values
        bytes32[] _values;
        // Position is the index of the value in the `values` array plus 1.
        // Position 0 is used to mean a value is not in the set.
        mapping(bytes32 value => uint256) _positions;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function _add(Set storage set, bytes32 value) private returns (bool) {
        if (!_contains(set, value)) {
            set._values.push(value);
            // The value is stored at length-1, but we add 1 to all indexes
            // and use 0 as a sentinel value
            set._positions[value] = set._values.length;
            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function _remove(Set storage set, bytes32 value) private returns (bool) {
        // We cache the value's position to prevent multiple reads from the same storage slot
        uint256 position = set._positions[value];

        if (position != 0) {
            // Equivalent to contains(set, value)
            // To delete an element from the _values array in O(1), we swap the element to delete with the last one in
            // the array, and then remove the last element (sometimes called as 'swap and pop').
            // This modifies the order of the array, as noted in {at}.

            uint256 valueIndex = position - 1;
            uint256 lastIndex = set._values.length - 1;

            if (valueIndex != lastIndex) {
                bytes32 lastValue = set._values[lastIndex];

                // Move the lastValue to the index where the value to delete is
                set._values[valueIndex] = lastValue;
                // Update the tracked position of the lastValue (that was just moved)
                set._positions[lastValue] = position;
            }

            // Delete the slot where the moved value was stored
            set._values.pop();

            // Delete the tracked position for the deleted slot
            delete set._positions[value];

            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function _contains(Set storage set, bytes32 value) private view returns (bool) {
        return set._positions[value] != 0;
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function _length(Set storage set) private view returns (uint256) {
        return set._values.length;
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function _at(Set storage set, uint256 index) private view returns (bytes32) {
        return set._values[index];
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function _values(Set storage set) private view returns (bytes32[] memory) {
        return set._values;
    }

    // Bytes32Set

    struct Bytes32Set {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _add(set._inner, value);
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _remove(set._inner, value);
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
        return _contains(set._inner, value);
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(Bytes32Set storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
        return _at(set._inner, index);
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(Bytes32Set storage set) internal view returns (bytes32[] memory) {
        bytes32[] memory store = _values(set._inner);
        bytes32[] memory result;

        /// @solidity memory-safe-assembly
        assembly {
            result := store
        }

        return result;
    }

    // AddressSet

    struct AddressSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(AddressSet storage set, address value) internal returns (bool) {
        return _add(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(AddressSet storage set, address value) internal returns (bool) {
        return _remove(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(AddressSet storage set, address value) internal view returns (bool) {
        return _contains(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(AddressSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(AddressSet storage set, uint256 index) internal view returns (address) {
        return address(uint160(uint256(_at(set._inner, index))));
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(AddressSet storage set) internal view returns (address[] memory) {
        bytes32[] memory store = _values(set._inner);
        address[] memory result;

        /// @solidity memory-safe-assembly
        assembly {
            result := store
        }

        return result;
    }

    // UintSet

    struct UintSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(UintSet storage set, uint256 value) internal returns (bool) {
        return _add(set._inner, bytes32(value));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(UintSet storage set, uint256 value) internal returns (bool) {
        return _remove(set._inner, bytes32(value));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(UintSet storage set, uint256 value) internal view returns (bool) {
        return _contains(set._inner, bytes32(value));
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(UintSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(UintSet storage set, uint256 index) internal view returns (uint256) {
        return uint256(_at(set._inner, index));
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(UintSet storage set) internal view returns (uint256[] memory) {
        bytes32[] memory store = _values(set._inner);
        uint256[] memory result;

        /// @solidity memory-safe-assembly
        assembly {
            result := store
        }

        return result;
    }
}

// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity 0.8.20;

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

import {Ownable2StepUpgradeable} from "@openzeppelin/contracts-upgradeable/access/Ownable2StepUpgradeable.sol";
import {PausableUpgradeable} from "@openzeppelin/contracts-upgradeable/utils/PausableUpgradeable.sol";
import {UUPSUpgradeable} from "@openzeppelin/contracts-upgradeable/proxy/utils/UUPSUpgradeable.sol";

abstract contract BaseOwnableUpgradeable is
    Ownable2StepUpgradeable,
    UUPSUpgradeable
{
    using SafeERC20 for IERC20;

    function __BaseOwnableUpgradeable_init(
        address initialOwner
    ) internal onlyInitializing {
        __Ownable_init(initialOwner);
        __Ownable2Step_init();
        __UUPSUpgradeable_init();
    }

    function renounceOwnership() public override {
        revert("Unable to renounce ownership");
    }

    function _authorizeUpgrade(
        address newImplementation
    ) internal override onlyOwner {}

    /// @notice Rescue and transfer assets locked in this contract.
    function rescue(address token, address to) external onlyOwner {
        if (token == address(0)) {
            (bool success, ) = payable(to).call{value: address(this).balance}(
                ""
            );
            require(success, "ETH transfer failed");
        } else {
            IERC20(token).safeTransfer(
                to,
                IERC20(token).balanceOf(address(this))
            );
        }
    }

    uint256[50] private __gap;
}

// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity 0.8.20;

import {ERC20Upgradeable} from "@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol";
import {BasePausableUpgradeable} from "./BasePausableUpgradeable.sol";

abstract contract FToken is ERC20Upgradeable, BasePausableUpgradeable {
    address public bridge;

    mapping(address user => bool blocked) public userBlocked;

    event UserLocked(address indexed user);
    event UserUnlocked(address indexed user);

    event BridgeUpdated(address indexed newBridge, address indexed oldBridge);

    modifier onlyBridge() {
        require(msg.sender == bridge, "Caller not bridge");
        _;
    }

    function __FToken_init(
        address _owner,
        address _bridge,
        string memory _name,
        string memory _symbol
    ) internal onlyInitializing {
        __ERC20_init(_name, _symbol);
        __BasePausableUpgradeable_init(_owner);
        bridge = _bridge;
    }

    function lockUser(address _user) external onlyOwner {
        userBlocked[_user] = true;
        emit UserLocked(_user);
    }

    function unlockUser(address _user) external onlyOwner {
        userBlocked[_user] = false;
        emit UserUnlocked(_user);
    }

    function setBridge(address _bridge) external onlyOwner {
        address oldBridge = bridge;
        bridge = _bridge;
        emit BridgeUpdated(_bridge, oldBridge);
    }

    function mint(address to, uint256 amount) external onlyBridge {
        _mint(to, amount);
    }

    function burn(address from, uint256 amount) external onlyBridge {
        _burn(from, amount);
    }

    function payFee(
        address payer,
        address feeRecipient,
        uint256 amount
    ) external onlyBridge {
        _transfer(payer, feeRecipient, amount);
    }

    function _update(
        address from,
        address to,
        uint256 value
    ) internal override whenNotPaused {
        require(!userBlocked[from], "from is blocked");
        require(!userBlocked[to], "to is blocked");
        super._update(from, to, value);
    }

    uint256[50] private __gap;
}

// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity 0.8.20;

import "@openzeppelin/contracts/utils/structs/EnumerableSet.sol";
import {Request, UserInfo} from "../Common.sol";

contract BridgeStorage {
    address public minter;
    address public fbtc;

    EnumerableSet.AddressSet internal qualifiedUsers;
    EnumerableSet.Bytes32Set internal dstChains;

    mapping(address qualifiedUser => UserInfo info) public userInfo;
    mapping(string depositAddress => address qualifiedUser)
        public depositAddressToUser; // For uniqueness check

    bytes32[] public requestHashes;
    mapping(bytes32 _hash => Request r) public requests;

    mapping(bytes32 bytesHash => bytes32 requestHash) public usedDepositTxs;
    mapping(bytes32 bytesHash => bytes32 requestHash) public usedWithdrawalTxs;

    mapping(bytes32 srcHash => bytes32 dstHash)
        public crosschainRequestConfirmation;

    address public feeModel;
    address public feeRecipient;

    uint256[50] private __gap;
}

// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity 0.8.20;

import {BaseOwnableUpgradeable} from "./BaseOwnableUpgradeable.sol";
import {PausableUpgradeable} from "@openzeppelin/contracts-upgradeable/utils/PausableUpgradeable.sol";

abstract contract BasePausableUpgradeable is
    BaseOwnableUpgradeable,
    PausableUpgradeable
{
    function __BasePausableUpgradeable_init(
        address initialOwner
    ) internal onlyInitializing {
        __BaseOwnableUpgradeable_init(initialOwner);
        __Pausable_init();
    }

    function pause() external onlyOwner {
        _pause();
    }

    function unpause() external onlyOwner {
        _unpause();
    }
}

// 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 {IERC20Permit} from "../extensions/IERC20Permit.sol";
import {Address} from "../../../utils/Address.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 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 ERC20 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 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
// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable2Step.sol)

pragma solidity ^0.8.20;

import {OwnableUpgradeable} from "./OwnableUpgradeable.sol";
import {Initializable} from "../proxy/utils/Initializable.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.
 *
 * 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 Ownable2StepUpgradeable is Initializable, OwnableUpgradeable {
    /// @custom:storage-location erc7201:openzeppelin.storage.Ownable2Step
    struct Ownable2StepStorage {
        address _pendingOwner;
    }

    // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.Ownable2Step")) - 1)) & ~bytes32(uint256(0xff))
    bytes32 private constant Ownable2StepStorageLocation = 0x237e158222e3e6968b72b9db0d8043aacf074ad9f650f0d1606b4d82ee432c00;

    function _getOwnable2StepStorage() private pure returns (Ownable2StepStorage storage $) {
        assembly {
            $.slot := Ownable2StepStorageLocation
        }
    }

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

    function __Ownable2Step_init() internal onlyInitializing {
    }

    function __Ownable2Step_init_unchained() internal onlyInitializing {
    }
    /**
     * @dev Returns the address of the pending owner.
     */
    function pendingOwner() public view virtual returns (address) {
        Ownable2StepStorage storage $ = _getOwnable2StepStorage();
        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 {
        Ownable2StepStorage storage $ = _getOwnable2StepStorage();
        $._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 {
        Ownable2StepStorage storage $ = _getOwnable2StepStorage();
        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) (utils/Pausable.sol)

pragma solidity ^0.8.20;

import {ContextUpgradeable} from "../utils/ContextUpgradeable.sol";
import {Initializable} from "../proxy/utils/Initializable.sol";

/**
 * @dev Contract module which allows children to implement an emergency stop
 * mechanism that can be triggered by an authorized account.
 *
 * This module is used through inheritance. It will make available the
 * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
 * the functions of your contract. Note that they will not be pausable by
 * simply including this module, only once the modifiers are put in place.
 */
abstract contract PausableUpgradeable is Initializable, ContextUpgradeable {
    /// @custom:storage-location erc7201:openzeppelin.storage.Pausable
    struct PausableStorage {
        bool _paused;
    }

    // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.Pausable")) - 1)) & ~bytes32(uint256(0xff))
    bytes32 private constant PausableStorageLocation = 0xcd5ed15c6e187e77e9aee88184c21f4f2182ab5827cb3b7e07fbedcd63f03300;

    function _getPausableStorage() private pure returns (PausableStorage storage $) {
        assembly {
            $.slot := PausableStorageLocation
        }
    }

    /**
     * @dev Emitted when the pause is triggered by `account`.
     */
    event Paused(address account);

    /**
     * @dev Emitted when the pause is lifted by `account`.
     */
    event Unpaused(address account);

    /**
     * @dev The operation failed because the contract is paused.
     */
    error EnforcedPause();

    /**
     * @dev The operation failed because the contract is not paused.
     */
    error ExpectedPause();

    /**
     * @dev Initializes the contract in unpaused state.
     */
    function __Pausable_init() internal onlyInitializing {
        __Pausable_init_unchained();
    }

    function __Pausable_init_unchained() internal onlyInitializing {
        PausableStorage storage $ = _getPausableStorage();
        $._paused = false;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    modifier whenNotPaused() {
        _requireNotPaused();
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    modifier whenPaused() {
        _requirePaused();
        _;
    }

    /**
     * @dev Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view virtual returns (bool) {
        PausableStorage storage $ = _getPausableStorage();
        return $._paused;
    }

    /**
     * @dev Throws if the contract is paused.
     */
    function _requireNotPaused() internal view virtual {
        if (paused()) {
            revert EnforcedPause();
        }
    }

    /**
     * @dev Throws if the contract is not paused.
     */
    function _requirePaused() internal view virtual {
        if (!paused()) {
            revert ExpectedPause();
        }
    }

    /**
     * @dev Triggers stopped state.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    function _pause() internal virtual whenNotPaused {
        PausableStorage storage $ = _getPausableStorage();
        $._paused = true;
        emit Paused(_msgSender());
    }

    /**
     * @dev Returns to normal state.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    function _unpause() internal virtual whenPaused {
        PausableStorage storage $ = _getPausableStorage();
        $._paused = false;
        emit Unpaused(_msgSender());
    }
}

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

pragma solidity ^0.8.20;

import {IERC1822Proxiable} from "@openzeppelin/contracts/interfaces/draft-IERC1822.sol";
import {ERC1967Utils} from "@openzeppelin/contracts/proxy/ERC1967/ERC1967Utils.sol";
import {Initializable} from "./Initializable.sol";

/**
 * @dev An upgradeability mechanism designed for UUPS proxies. The functions included here can perform an upgrade of an
 * {ERC1967Proxy}, when this contract is set as the implementation behind such a proxy.
 *
 * A security mechanism ensures that an upgrade does not turn off upgradeability accidentally, although this risk is
 * reinstated if the upgrade retains upgradeability but removes the security mechanism, e.g. by replacing
 * `UUPSUpgradeable` with a custom implementation of upgrades.
 *
 * The {_authorizeUpgrade} function must be overridden to include access restriction to the upgrade mechanism.
 */
abstract contract UUPSUpgradeable is Initializable, IERC1822Proxiable {
    /// @custom:oz-upgrades-unsafe-allow state-variable-immutable
    address private immutable __self = address(this);

    /**
     * @dev The version of the upgrade interface of the contract. If this getter is missing, both `upgradeTo(address)`
     * and `upgradeToAndCall(address,bytes)` are present, and `upgradeTo` must be used if no function should be called,
     * while `upgradeToAndCall` will invoke the `receive` function if the second argument is the empty byte string.
     * If the getter returns `"5.0.0"`, only `upgradeToAndCall(address,bytes)` is present, and the second argument must
     * be the empty byte string if no function should be called, making it impossible to invoke the `receive` function
     * during an upgrade.
     */
    string public constant UPGRADE_INTERFACE_VERSION = "5.0.0";

    /**
     * @dev The call is from an unauthorized context.
     */
    error UUPSUnauthorizedCallContext();

    /**
     * @dev The storage `slot` is unsupported as a UUID.
     */
    error UUPSUnsupportedProxiableUUID(bytes32 slot);

    /**
     * @dev Check that the execution is being performed through a delegatecall call and that the execution context is
     * a proxy contract with an implementation (as defined in ERC1967) pointing to self. This should only be the case
     * for UUPS and transparent proxies that are using the current contract as their implementation. Execution of a
     * function through ERC1167 minimal proxies (clones) would not normally pass this test, but is not guaranteed to
     * fail.
     */
    modifier onlyProxy() {
        _checkProxy();
        _;
    }

    /**
     * @dev Check that the execution is not being performed through a delegate call. This allows a function to be
     * callable on the implementing contract but not through proxies.
     */
    modifier notDelegated() {
        _checkNotDelegated();
        _;
    }

    function __UUPSUpgradeable_init() internal onlyInitializing {
    }

    function __UUPSUpgradeable_init_unchained() internal onlyInitializing {
    }
    /**
     * @dev Implementation of the ERC1822 {proxiableUUID} function. This returns the storage slot used by the
     * implementation. It is used to validate the implementation's compatibility when performing an upgrade.
     *
     * IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks
     * bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this
     * function revert if invoked through a proxy. This is guaranteed by the `notDelegated` modifier.
     */
    function proxiableUUID() external view virtual notDelegated returns (bytes32) {
        return ERC1967Utils.IMPLEMENTATION_SLOT;
    }

    /**
     * @dev Upgrade the implementation of the proxy to `newImplementation`, and subsequently execute the function call
     * encoded in `data`.
     *
     * Calls {_authorizeUpgrade}.
     *
     * Emits an {Upgraded} event.
     *
     * @custom:oz-upgrades-unsafe-allow-reachable delegatecall
     */
    function upgradeToAndCall(address newImplementation, bytes memory data) public payable virtual onlyProxy {
        _authorizeUpgrade(newImplementation);
        _upgradeToAndCallUUPS(newImplementation, data);
    }

    /**
     * @dev Reverts if the execution is not performed via delegatecall or the execution
     * context is not of a proxy with an ERC1967-compliant implementation pointing to self.
     * See {_onlyProxy}.
     */
    function _checkProxy() internal view virtual {
        if (
            address(this) == __self || // Must be called through delegatecall
            ERC1967Utils.getImplementation() != __self // Must be called through an active proxy
        ) {
            revert UUPSUnauthorizedCallContext();
        }
    }

    /**
     * @dev Reverts if the execution is performed via delegatecall.
     * See {notDelegated}.
     */
    function _checkNotDelegated() internal view virtual {
        if (address(this) != __self) {
            // Must not be called through delegatecall
            revert UUPSUnauthorizedCallContext();
        }
    }

    /**
     * @dev Function that should revert when `msg.sender` is not authorized to upgrade the contract. Called by
     * {upgradeToAndCall}.
     *
     * Normally, this function will use an xref:access.adoc[access control] modifier such as {Ownable-onlyOwner}.
     *
     * ```solidity
     * function _authorizeUpgrade(address) internal onlyOwner {}
     * ```
     */
    function _authorizeUpgrade(address newImplementation) internal virtual;

    /**
     * @dev Performs an implementation upgrade with a security check for UUPS proxies, and additional setup call.
     *
     * As a security check, {proxiableUUID} is invoked in the new implementation, and the return value
     * is expected to be the implementation slot in ERC1967.
     *
     * Emits an {IERC1967-Upgraded} event.
     */
    function _upgradeToAndCallUUPS(address newImplementation, bytes memory data) private {
        try IERC1822Proxiable(newImplementation).proxiableUUID() returns (bytes32 slot) {
            if (slot != ERC1967Utils.IMPLEMENTATION_SLOT) {
                revert UUPSUnsupportedProxiableUUID(slot);
            }
            ERC1967Utils.upgradeToAndCall(newImplementation, data);
        } catch {
            // The implementation is not UUPS
            revert ERC1967Utils.ERC1967InvalidImplementation(newImplementation);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/ERC20.sol)

pragma solidity ^0.8.20;

import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {IERC20Metadata} from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";
import {ContextUpgradeable} from "../../utils/ContextUpgradeable.sol";
import {IERC20Errors} from "@openzeppelin/contracts/interfaces/draft-IERC6093.sol";
import {Initializable} from "../../proxy/utils/Initializable.sol";

/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * The default value of {decimals} is 18. To change this, you should override
 * this function so it returns a different value.
 *
 * We have followed general OpenZeppelin Contracts guidelines: functions revert
 * instead returning `false` on failure. This behavior is nonetheless
 * conventional and does not conflict with the expectations of ERC20
 * applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 */
abstract contract ERC20Upgradeable is Initializable, ContextUpgradeable, IERC20, IERC20Metadata, IERC20Errors {
    /// @custom:storage-location erc7201:openzeppelin.storage.ERC20
    struct ERC20Storage {
        mapping(address account => uint256) _balances;

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

        uint256 _totalSupply;

        string _name;
        string _symbol;
    }

    // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.ERC20")) - 1)) & ~bytes32(uint256(0xff))
    bytes32 private constant ERC20StorageLocation = 0x52c63247e1f47db19d5ce0460030c497f067ca4cebf71ba98eeadabe20bace00;

    function _getERC20Storage() private pure returns (ERC20Storage storage $) {
        assembly {
            $.slot := ERC20StorageLocation
        }
    }

    /**
     * @dev Sets the values for {name} and {symbol}.
     *
     * All two of these values are immutable: they can only be set once during
     * construction.
     */
    function __ERC20_init(string memory name_, string memory symbol_) internal onlyInitializing {
        __ERC20_init_unchained(name_, symbol_);
    }

    function __ERC20_init_unchained(string memory name_, string memory symbol_) internal onlyInitializing {
        ERC20Storage storage $ = _getERC20Storage();
        $._name = name_;
        $._symbol = symbol_;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual returns (string memory) {
        ERC20Storage storage $ = _getERC20Storage();
        return $._name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual returns (string memory) {
        ERC20Storage storage $ = _getERC20Storage();
        return $._symbol;
    }

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

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view virtual returns (uint256) {
        ERC20Storage storage $ = _getERC20Storage();
        return $._totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view virtual returns (uint256) {
        ERC20Storage storage $ = _getERC20Storage();
        return $._balances[account];
    }

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

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual returns (uint256) {
        ERC20Storage storage $ = _getERC20Storage();
        return $._allowances[owner][spender];
    }

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

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

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

    /**
     * @dev Transfers a `value` amount of tokens from `from` to `to`, or alternatively mints (or burns) if `from`
     * (or `to`) is the zero address. All customizations to transfers, mints, and burns should be done by overriding
     * this function.
     *
     * Emits a {Transfer} event.
     */
    function _update(address from, address to, uint256 value) internal virtual {
        ERC20Storage storage $ = _getERC20Storage();
        if (from == address(0)) {
            // Overflow check required: The rest of the code assumes that totalSupply never overflows
            $._totalSupply += value;
        } else {
            uint256 fromBalance = $._balances[from];
            if (fromBalance < value) {
                revert ERC20InsufficientBalance(from, fromBalance, value);
            }
            unchecked {
                // Overflow not possible: value <= fromBalance <= totalSupply.
                $._balances[from] = fromBalance - value;
            }
        }

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

        emit Transfer(from, to, value);
    }

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

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

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

    /**
     * @dev Variant of {_approve} with an optional flag to enable or disable the {Approval} event.
     *
     * By default (when calling {_approve}) the flag is set to true. On the other hand, approval changes made by
     * `_spendAllowance` during the `transferFrom` operation set the flag to false. This saves gas by not emitting any
     * `Approval` event during `transferFrom` operations.
     *
     * Anyone who wishes to continue emitting `Approval` events on the`transferFrom` operation can force the flag to
     * true using the following override:
     * ```
     * function _approve(address owner, address spender, uint256 value, bool) internal virtual override {
     *     super._approve(owner, spender, value, true);
     * }
     * ```
     *
     * Requirements are the same as {_approve}.
     */
    function _approve(address owner, address spender, uint256 value, bool emitEvent) internal virtual {
        ERC20Storage storage $ = _getERC20Storage();
        if (owner == address(0)) {
            revert ERC20InvalidApprover(address(0));
        }
        if (spender == address(0)) {
            revert ERC20InvalidSpender(address(0));
        }
        $._allowances[owner][spender] = value;
        if (emitEvent) {
            emit Approval(owner, spender, value);
        }
    }

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.20;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
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) (token/ERC20/extensions/IERC20Permit.sol)

pragma solidity ^0.8.20;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 *
 * ==== Security Considerations
 *
 * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature
 * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be
 * considered as an intention to spend the allowance in any specific way. The second is that because permits have
 * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should
 * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be
 * generally recommended is:
 *
 * ```solidity
 * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public {
 *     try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {}
 *     doThing(..., value);
 * }
 *
 * function doThing(..., uint256 value) public {
 *     token.safeTransferFrom(msg.sender, address(this), value);
 *     ...
 * }
 * ```
 *
 * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of
 * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also
 * {SafeERC20-safeTransferFrom}).
 *
 * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so
 * contracts should have entry points that don't rely on permit.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     *
     * CAUTION: See Security Considerations above.
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    /**
     * @dev Returns the current nonce for `owner`. This value must be
     * included whenever a signature is generated for {permit}.
     *
     * Every successful call to {permit} increases ``owner``'s nonce by one. This
     * prevents a signature from being used multiple times.
     */
    function nonces(address owner) external view returns (uint256);

    /**
     * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
     */
    // solhint-disable-next-line func-name-mixedcase
    function DOMAIN_SEPARATOR() external view returns (bytes32);
}

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

pragma solidity ^0.8.20;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev The ETH balance of the account is not enough to perform the operation.
     */
    error AddressInsufficientBalance(address account);

    /**
     * @dev There's no code at `target` (it is not a contract).
     */
    error AddressEmptyCode(address target);

    /**
     * @dev A call to an address target failed. The target may have reverted.
     */
    error FailedInnerCall();

    /**
     * @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 AddressInsufficientBalance(address(this));
        }

        (bool success, ) = recipient.call{value: amount}("");
        if (!success) {
            revert FailedInnerCall();
        }
    }

    /**
     * @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
     * {FailedInnerCall} 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 AddressInsufficientBalance(address(this));
        }
        (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 {FailedInnerCall}) 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 {FailedInnerCall} 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 {FailedInnerCall}.
     */
    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 FailedInnerCall();
        }
    }
}

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

pragma solidity ^0.8.20;

import {ContextUpgradeable} from "../utils/ContextUpgradeable.sol";
import {Initializable} from "../proxy/utils/Initializable.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 OwnableUpgradeable is Initializable, ContextUpgradeable {
    /// @custom:storage-location erc7201:openzeppelin.storage.Ownable
    struct OwnableStorage {
        address _owner;
    }

    // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.Ownable")) - 1)) & ~bytes32(uint256(0xff))
    bytes32 private constant OwnableStorageLocation = 0x9016d09d72d40fdae2fd8ceac6b6234c7706214fd39c1cd1e609a0528c199300;

    function _getOwnableStorage() private pure returns (OwnableStorage storage $) {
        assembly {
            $.slot := OwnableStorageLocation
        }
    }

    /**
     * @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.
     */
    function __Ownable_init(address initialOwner) internal onlyInitializing {
        __Ownable_init_unchained(initialOwner);
    }

    function __Ownable_init_unchained(address initialOwner) internal onlyInitializing {
        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) {
        OwnableStorage storage $ = _getOwnableStorage();
        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 {
        OwnableStorage storage $ = _getOwnableStorage();
        address oldOwner = $._owner;
        $._owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// 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
// OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)

pragma solidity ^0.8.20;
import {Initializable} from "../proxy/utils/Initializable.sol";

/**
 * @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 ContextUpgradeable is Initializable {
    function __Context_init() internal onlyInitializing {
    }

    function __Context_init_unchained() internal onlyInitializing {
    }
    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) (interfaces/draft-IERC1822.sol)

pragma solidity ^0.8.20;

/**
 * @dev ERC1822: Universal Upgradeable Proxy Standard (UUPS) documents a method for upgradeability through a simplified
 * proxy whose upgrades are fully controlled by the current implementation.
 */
interface IERC1822Proxiable {
    /**
     * @dev Returns the storage slot that the proxiable contract assumes is being used to store the implementation
     * address.
     *
     * IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks
     * bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this
     * function revert if invoked through a proxy.
     */
    function proxiableUUID() external view returns (bytes32);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (proxy/ERC1967/ERC1967Utils.sol)

pragma solidity ^0.8.20;

import {IBeacon} from "../beacon/IBeacon.sol";
import {Address} from "../../utils/Address.sol";
import {StorageSlot} from "../../utils/StorageSlot.sol";

/**
 * @dev This abstract contract provides getters and event emitting update functions for
 * https://eips.ethereum.org/EIPS/eip-1967[EIP1967] slots.
 */
library ERC1967Utils {
    // We re-declare ERC-1967 events here because they can't be used directly from IERC1967.
    // This will be fixed in Solidity 0.8.21. At that point we should remove these events.
    /**
     * @dev Emitted when the implementation is upgraded.
     */
    event Upgraded(address indexed implementation);

    /**
     * @dev Emitted when the admin account has changed.
     */
    event AdminChanged(address previousAdmin, address newAdmin);

    /**
     * @dev Emitted when the beacon is changed.
     */
    event BeaconUpgraded(address indexed beacon);

    /**
     * @dev Storage slot with the address of the current implementation.
     * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1.
     */
    // solhint-disable-next-line private-vars-leading-underscore
    bytes32 internal constant IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;

    /**
     * @dev The `implementation` of the proxy is invalid.
     */
    error ERC1967InvalidImplementation(address implementation);

    /**
     * @dev The `admin` of the proxy is invalid.
     */
    error ERC1967InvalidAdmin(address admin);

    /**
     * @dev The `beacon` of the proxy is invalid.
     */
    error ERC1967InvalidBeacon(address beacon);

    /**
     * @dev An upgrade function sees `msg.value > 0` that may be lost.
     */
    error ERC1967NonPayable();

    /**
     * @dev Returns the current implementation address.
     */
    function getImplementation() internal view returns (address) {
        return StorageSlot.getAddressSlot(IMPLEMENTATION_SLOT).value;
    }

    /**
     * @dev Stores a new address in the EIP1967 implementation slot.
     */
    function _setImplementation(address newImplementation) private {
        if (newImplementation.code.length == 0) {
            revert ERC1967InvalidImplementation(newImplementation);
        }
        StorageSlot.getAddressSlot(IMPLEMENTATION_SLOT).value = newImplementation;
    }

    /**
     * @dev Performs implementation upgrade with additional setup call if data is nonempty.
     * This function is payable only if the setup call is performed, otherwise `msg.value` is rejected
     * to avoid stuck value in the contract.
     *
     * Emits an {IERC1967-Upgraded} event.
     */
    function upgradeToAndCall(address newImplementation, bytes memory data) internal {
        _setImplementation(newImplementation);
        emit Upgraded(newImplementation);

        if (data.length > 0) {
            Address.functionDelegateCall(newImplementation, data);
        } else {
            _checkNonPayable();
        }
    }

    /**
     * @dev Storage slot with the admin of the contract.
     * This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1.
     */
    // solhint-disable-next-line private-vars-leading-underscore
    bytes32 internal constant ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;

    /**
     * @dev Returns the current admin.
     *
     * TIP: To get this value clients can read directly from the storage slot shown below (specified by EIP1967) using
     * the https://eth.wiki/json-rpc/API#eth_getstorageat[`eth_getStorageAt`] RPC call.
     * `0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103`
     */
    function getAdmin() internal view returns (address) {
        return StorageSlot.getAddressSlot(ADMIN_SLOT).value;
    }

    /**
     * @dev Stores a new address in the EIP1967 admin slot.
     */
    function _setAdmin(address newAdmin) private {
        if (newAdmin == address(0)) {
            revert ERC1967InvalidAdmin(address(0));
        }
        StorageSlot.getAddressSlot(ADMIN_SLOT).value = newAdmin;
    }

    /**
     * @dev Changes the admin of the proxy.
     *
     * Emits an {IERC1967-AdminChanged} event.
     */
    function changeAdmin(address newAdmin) internal {
        emit AdminChanged(getAdmin(), newAdmin);
        _setAdmin(newAdmin);
    }

    /**
     * @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy.
     * This is the keccak-256 hash of "eip1967.proxy.beacon" subtracted by 1.
     */
    // solhint-disable-next-line private-vars-leading-underscore
    bytes32 internal constant BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50;

    /**
     * @dev Returns the current beacon.
     */
    function getBeacon() internal view returns (address) {
        return StorageSlot.getAddressSlot(BEACON_SLOT).value;
    }

    /**
     * @dev Stores a new beacon in the EIP1967 beacon slot.
     */
    function _setBeacon(address newBeacon) private {
        if (newBeacon.code.length == 0) {
            revert ERC1967InvalidBeacon(newBeacon);
        }

        StorageSlot.getAddressSlot(BEACON_SLOT).value = newBeacon;

        address beaconImplementation = IBeacon(newBeacon).implementation();
        if (beaconImplementation.code.length == 0) {
            revert ERC1967InvalidImplementation(beaconImplementation);
        }
    }

    /**
     * @dev Change the beacon and trigger a setup call if data is nonempty.
     * This function is payable only if the setup call is performed, otherwise `msg.value` is rejected
     * to avoid stuck value in the contract.
     *
     * Emits an {IERC1967-BeaconUpgraded} event.
     *
     * CAUTION: Invoking this function has no effect on an instance of {BeaconProxy} since v5, since
     * it uses an immutable beacon without looking at the value of the ERC-1967 beacon slot for
     * efficiency.
     */
    function upgradeBeaconToAndCall(address newBeacon, bytes memory data) internal {
        _setBeacon(newBeacon);
        emit BeaconUpgraded(newBeacon);

        if (data.length > 0) {
            Address.functionDelegateCall(IBeacon(newBeacon).implementation(), data);
        } else {
            _checkNonPayable();
        }
    }

    /**
     * @dev Reverts if `msg.value` is not zero. It can be used to avoid `msg.value` stuck in the contract
     * if an upgrade doesn't perform an initialization call.
     */
    function _checkNonPayable() private {
        if (msg.value > 0) {
            revert ERC1967NonPayable();
        }
    }
}

// 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 ERC20 standard.
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/draft-IERC6093.sol)
pragma solidity ^0.8.20;

/**
 * @dev Standard ERC20 Errors
 * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC20 tokens.
 */
interface IERC20Errors {
    /**
     * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     * @param balance Current balance for the interacting account.
     * @param needed Minimum amount required to perform a transfer.
     */
    error ERC20InsufficientBalance(address sender, uint256 balance, uint256 needed);

    /**
     * @dev Indicates a failure with the token `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     */
    error ERC20InvalidSender(address sender);

    /**
     * @dev Indicates a failure with the token `receiver`. Used in transfers.
     * @param receiver Address to which tokens are being transferred.
     */
    error ERC20InvalidReceiver(address receiver);

    /**
     * @dev Indicates a failure with the `spender`’s `allowance`. Used in transfers.
     * @param spender Address that may be allowed to operate on tokens without being their owner.
     * @param allowance Amount of tokens a `spender` is allowed to operate with.
     * @param needed Minimum amount required to perform a transfer.
     */
    error ERC20InsufficientAllowance(address spender, uint256 allowance, uint256 needed);

    /**
     * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
     * @param approver Address initiating an approval operation.
     */
    error ERC20InvalidApprover(address approver);

    /**
     * @dev Indicates a failure with the `spender` to be approved. Used in approvals.
     * @param spender Address that may be allowed to operate on tokens without being their owner.
     */
    error ERC20InvalidSpender(address spender);
}

/**
 * @dev Standard ERC721 Errors
 * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC721 tokens.
 */
interface IERC721Errors {
    /**
     * @dev Indicates that an address can't be an owner. For example, `address(0)` is a forbidden owner in EIP-20.
     * Used in balance queries.
     * @param owner Address of the current owner of a token.
     */
    error ERC721InvalidOwner(address owner);

    /**
     * @dev Indicates a `tokenId` whose `owner` is the zero address.
     * @param tokenId Identifier number of a token.
     */
    error ERC721NonexistentToken(uint256 tokenId);

    /**
     * @dev Indicates an error related to the ownership over a particular token. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     * @param tokenId Identifier number of a token.
     * @param owner Address of the current owner of a token.
     */
    error ERC721IncorrectOwner(address sender, uint256 tokenId, address owner);

    /**
     * @dev Indicates a failure with the token `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     */
    error ERC721InvalidSender(address sender);

    /**
     * @dev Indicates a failure with the token `receiver`. Used in transfers.
     * @param receiver Address to which tokens are being transferred.
     */
    error ERC721InvalidReceiver(address receiver);

    /**
     * @dev Indicates a failure with the `operator`’s approval. Used in transfers.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     * @param tokenId Identifier number of a token.
     */
    error ERC721InsufficientApproval(address operator, uint256 tokenId);

    /**
     * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
     * @param approver Address initiating an approval operation.
     */
    error ERC721InvalidApprover(address approver);

    /**
     * @dev Indicates a failure with the `operator` to be approved. Used in approvals.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     */
    error ERC721InvalidOperator(address operator);
}

/**
 * @dev Standard ERC1155 Errors
 * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC1155 tokens.
 */
interface IERC1155Errors {
    /**
     * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     * @param balance Current balance for the interacting account.
     * @param needed Minimum amount required to perform a transfer.
     * @param tokenId Identifier number of a token.
     */
    error ERC1155InsufficientBalance(address sender, uint256 balance, uint256 needed, uint256 tokenId);

    /**
     * @dev Indicates a failure with the token `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     */
    error ERC1155InvalidSender(address sender);

    /**
     * @dev Indicates a failure with the token `receiver`. Used in transfers.
     * @param receiver Address to which tokens are being transferred.
     */
    error ERC1155InvalidReceiver(address receiver);

    /**
     * @dev Indicates a failure with the `operator`’s approval. Used in transfers.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     * @param owner Address of the current owner of a token.
     */
    error ERC1155MissingApprovalForAll(address operator, address owner);

    /**
     * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
     * @param approver Address initiating an approval operation.
     */
    error ERC1155InvalidApprover(address approver);

    /**
     * @dev Indicates a failure with the `operator` to be approved. Used in approvals.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     */
    error ERC1155InvalidOperator(address operator);

    /**
     * @dev Indicates an array length mismatch between ids and values in a safeBatchTransferFrom operation.
     * Used in batch transfers.
     * @param idsLength Length of the array of token identifiers
     * @param valuesLength Length of the array of token amounts
     */
    error ERC1155InvalidArrayLength(uint256 idsLength, uint256 valuesLength);
}

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

pragma solidity ^0.8.20;

/**
 * @dev This is the interface that {BeaconProxy} expects of its beacon.
 */
interface IBeacon {
    /**
     * @dev Must return an address that can be used as a delegate call target.
     *
     * {UpgradeableBeacon} will check that this address is a contract.
     */
    function implementation() external view returns (address);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/StorageSlot.sol)
// This file was procedurally generated from scripts/generate/templates/StorageSlot.js.

pragma solidity ^0.8.20;

/**
 * @dev Library for reading and writing primitive types to specific storage slots.
 *
 * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
 * This library helps with reading and writing to such slots without the need for inline assembly.
 *
 * The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
 *
 * Example usage to set ERC1967 implementation slot:
 * ```solidity
 * contract ERC1967 {
 *     bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
 *
 *     function _getImplementation() internal view returns (address) {
 *         return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
 *     }
 *
 *     function _setImplementation(address newImplementation) internal {
 *         require(newImplementation.code.length > 0);
 *         StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
 *     }
 * }
 * ```
 */
library StorageSlot {
    struct AddressSlot {
        address value;
    }

    struct BooleanSlot {
        bool value;
    }

    struct Bytes32Slot {
        bytes32 value;
    }

    struct Uint256Slot {
        uint256 value;
    }

    struct StringSlot {
        string value;
    }

    struct BytesSlot {
        bytes value;
    }

    /**
     * @dev Returns an `AddressSlot` with member `value` located at `slot`.
     */
    function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `BooleanSlot` with member `value` located at `slot`.
     */
    function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
     */
    function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Uint256Slot` with member `value` located at `slot`.
     */
    function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `StringSlot` with member `value` located at `slot`.
     */
    function getStringSlot(bytes32 slot) internal pure returns (StringSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `StringSlot` representation of the string storage pointer `store`.
     */
    function getStringSlot(string storage store) internal pure returns (StringSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := store.slot
        }
    }

    /**
     * @dev Returns an `BytesSlot` with member `value` located at `slot`.
     */
    function getBytesSlot(bytes32 slot) internal pure returns (BytesSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `BytesSlot` representation of the bytes storage pointer `store`.
     */
    function getBytesSlot(bytes storage store) internal pure returns (BytesSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := store.slot
        }
    }
}

{
  "remappings": [
    "@openzeppelin/contracts/=lib/openzeppelin-contracts/contracts/",
    "@openzeppelin/contracts-upgradeable/=lib/openzeppelin-contracts-upgradeable/contracts/",
    "ds-test/=lib/forge-std/lib/ds-test/src/",
    "forge-std/=lib/forge-std/src/",
    "openzeppelin-contracts/=lib/openzeppelin-contracts/",
    "erc4626-tests/=lib/openzeppelin-contracts-upgradeable/lib/erc4626-tests/",
    "openzeppelin-contracts-upgradeable/=lib/openzeppelin-contracts-upgradeable/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 20000
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "ipfs",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "london",
  "viaIR": true,
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"address","name":"_owner","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[{"internalType":"address","name":"target","type":"address"}],"name":"AddressEmptyCode","type":"error"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"AddressInsufficientBalance","type":"error"},{"inputs":[{"internalType":"address","name":"implementation","type":"address"}],"name":"ERC1967InvalidImplementation","type":"error"},{"inputs":[],"name":"ERC1967NonPayable","type":"error"},{"inputs":[],"name":"FailedInnerCall","type":"error"},{"inputs":[],"name":"InvalidInitialization","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":[{"internalType":"address","name":"token","type":"address"}],"name":"SafeERC20FailedOperation","type":"error"},{"inputs":[],"name":"UUPSUnauthorizedCallContext","type":"error"},{"inputs":[{"internalType":"bytes32","name":"slot","type":"bytes32"}],"name":"UUPSUnsupportedProxiableUUID","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"chain","type":"bytes32"},{"indexed":true,"internalType":"uint256","name":"_minFee","type":"uint256"}],"name":"CrosschainFeeUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_fbtcModule","type":"address"}],"name":"FBTCModuleSet","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":"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"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"address","name":"account","type":"address"}],"name":"RoleGranted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"address","name":"account","type":"address"}],"name":"RoleRevoked","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"implementation","type":"address"}],"name":"Upgraded","type":"event"},{"inputs":[],"name":"FEE_UPDATER_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"UPGRADE_INTERFACE_VERSION","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"acceptOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"fbtcModule","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"uint256","name":"index","type":"uint256"}],"name":"getRoleMember","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"}],"name":"getRoleMemberCount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"}],"name":"getRoleMembers","outputs":[{"internalType":"address[]","name":"","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"grantRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"hasRole","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_owner","type":"address"}],"name":"initialize","outputs":[],"stateMutability":"nonpayable","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":[],"name":"proxiableUUID","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"address","name":"to","type":"address"}],"name":"rescue","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"revokeRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"safe","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_fbtcModule","type":"address"}],"name":"setFBTCGovernorModule","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"chain","type":"bytes32"},{"internalType":"uint256","name":"_minFee","type":"uint256"}],"name":"updateCrossChainMinFee","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newImplementation","type":"address"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"upgradeToAndCall","outputs":[],"stateMutability":"payable","type":"function"}]

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000000000000000000000000bbc5af58233eaccdcf871f52ac29a0affd78accc

-----Decoded View---------------
Arg [0] : _owner (address): 0xBbc5AF58233eACcDCf871f52ac29A0AFFd78acCC

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 000000000000000000000000bbc5af58233eaccdcf871f52ac29a0affd78accc