// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.13;
import { LibAsset } from "../Libraries/LibAsset.sol";
/// @title Fee Collector
/// @author LI.FI (https://li.fi)
/// @notice Provides functionality for collecting integrator fees
contract FeeCollector {
    /// State ///
    // Integrator -> TokenAddress -> Balance
    mapping(address => mapping(address => uint256)) private _balances;
    // TokenAddress -> Balance
    mapping(address => uint256) private _lifiBalances;
    address public owner;
    address public pendingOwner;
    /// Errors ///
    error Unauthorized(address);
    error NoNullOwner();
    error NewOwnerMustNotBeSelf();
    error NoPendingOwnershipTransfer();
    error NotPendingOwner();
    error TransferFailure();
    /// Events ///
    event FeesCollected(address indexed _token, address indexed _integrator, uint256 _integratorFee, uint256 _lifiFee);
    event FeesWithdrawn(address indexed _token, address indexed _to, uint256 _amount);
    event LiFiFeesWithdrawn(address indexed _token, address indexed _to, uint256 _amount);
    event OwnershipTransferRequested(address indexed _from, address indexed _to);
    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
    /// Constructor ///
    constructor(address _owner) {
        owner = _owner;
    }
    /// External Methods ///
    /// @notice Collects fees for the integrator
    /// @param tokenAddress address of the token to collect fees for
    /// @param integratorFee amount of fees to collect going to the integrator
    /// @param lifiFee amount of fees to collect going to lifi
    /// @param integratorAddress address of the integrator
    function collectTokenFees(
        address tokenAddress,
        uint256 integratorFee,
        uint256 lifiFee,
        address integratorAddress
    ) external {
        LibAsset.depositAsset(tokenAddress, integratorFee + lifiFee);
        _balances[integratorAddress][tokenAddress] += integratorFee;
        _lifiBalances[tokenAddress] += lifiFee;
        emit FeesCollected(tokenAddress, integratorAddress, integratorFee, lifiFee);
    }
    /// @notice Collects fees for the integrator in native token
    /// @param integratorFee amount of fees to collect going to the integrator
    /// @param lifiFee amount of fees to collect going to lifi
    /// @param integratorAddress address of the integrator
    function collectNativeFees(
        uint256 integratorFee,
        uint256 lifiFee,
        address integratorAddress
    ) external payable {
        _balances[integratorAddress][LibAsset.NULL_ADDRESS] += integratorFee;
        _lifiBalances[LibAsset.NULL_ADDRESS] += lifiFee;
        uint256 remaining = msg.value - (integratorFee + lifiFee);
        // Prevent extra native token from being locked in the contract
        if (remaining > 0) {
            (bool success, ) = msg.sender.call{ value: remaining }("");
            if (!success) {
                revert TransferFailure();
            }
        }
        emit FeesCollected(LibAsset.NULL_ADDRESS, integratorAddress, integratorFee, lifiFee);
    }
    /// @notice Withdraw fees and sends to the integrator
    /// @param tokenAddress address of the token to withdraw fees for
    function withdrawIntegratorFees(address tokenAddress) external {
        uint256 balance = _balances[msg.sender][tokenAddress];
        if (balance == 0) {
            return;
        }
        _balances[msg.sender][tokenAddress] = 0;
        LibAsset.transferAsset(tokenAddress, payable(msg.sender), balance);
        emit FeesWithdrawn(tokenAddress, msg.sender, balance);
    }
    /// @notice Batch withdraw fees and sends to the integrator
    /// @param tokenAddresses addresses of the tokens to withdraw fees for
    function batchWithdrawIntegratorFees(address[] memory tokenAddresses) external {
        uint256 length = tokenAddresses.length;
        uint256 balance;
        for (uint256 i = 0; i < length; i++) {
            balance = _balances[msg.sender][tokenAddresses[i]];
            if (balance == 0) {
                continue;
            }
            _balances[msg.sender][tokenAddresses[i]] = 0;
            LibAsset.transferAsset(tokenAddresses[i], payable(msg.sender), balance);
            emit FeesWithdrawn(tokenAddresses[i], msg.sender, balance);
        }
    }
    /// @notice Withdraws fees and sends to lifi
    /// @param tokenAddress address of the token to withdraw fees for
    function withdrawLifiFees(address tokenAddress) external {
        _enforceIsContractOwner();
        uint256 balance = _lifiBalances[tokenAddress];
        if (balance == 0) {
            return;
        }
        _lifiBalances[tokenAddress] = 0;
        LibAsset.transferAsset(tokenAddress, payable(owner), balance);
        emit LiFiFeesWithdrawn(tokenAddress, msg.sender, balance);
    }
    /// @notice Batch withdraws fees and sends to lifi
    /// @param tokenAddresses addresses of the tokens to withdraw fees for
    function batchWithdrawLifiFees(address[] memory tokenAddresses) external {
        _enforceIsContractOwner();
        uint256 length = tokenAddresses.length;
        uint256 balance;
        for (uint256 i = 0; i < length; i++) {
            balance = _lifiBalances[tokenAddresses[i]];
            if (balance == 0) {
                continue;
            }
            _lifiBalances[tokenAddresses[i]] = 0;
            LibAsset.transferAsset(tokenAddresses[i], payable(owner), balance);
            emit LiFiFeesWithdrawn(tokenAddresses[i], msg.sender, balance);
        }
    }
    /// @notice Returns the balance of the integrator
    /// @param integratorAddress address of the integrator
    /// @param tokenAddress address of the token to get the balance of
    function getTokenBalance(address integratorAddress, address tokenAddress) external view returns (uint256) {
        return _balances[integratorAddress][tokenAddress];
    }
    /// @notice Returns the balance of lifi
    /// @param tokenAddress address of the token to get the balance of
    function getLifiTokenBalance(address tokenAddress) external view returns (uint256) {
        return _lifiBalances[tokenAddress];
    }
    /// @notice Intitiates transfer of ownership to a new address
    /// @param _newOwner the address to transfer ownership to
    function transferOwnership(address _newOwner) external {
        _enforceIsContractOwner();
        if (_newOwner == LibAsset.NULL_ADDRESS) revert NoNullOwner();
        if (_newOwner == owner) revert NewOwnerMustNotBeSelf();
        pendingOwner = _newOwner;
        emit OwnershipTransferRequested(msg.sender, pendingOwner);
    }
    /// @notice Cancel transfer of ownership
    function cancelOnwershipTransfer() external {
        _enforceIsContractOwner();
        if (pendingOwner == LibAsset.NULL_ADDRESS) revert NoPendingOwnershipTransfer();
        pendingOwner = LibAsset.NULL_ADDRESS;
    }
    /// @notice Confirms transfer of ownership to the calling address (msg.sender)
    function confirmOwnershipTransfer() external {
        if (msg.sender != pendingOwner) revert NotPendingOwner();
        owner = pendingOwner;
        pendingOwner = LibAsset.NULL_ADDRESS;
        emit OwnershipTransferred(owner, pendingOwner);
    }
    /// Private Methods ///
    /// @notice Ensures that the calling address is the owner of the contract
    function _enforceIsContractOwner() private view {
        if (msg.sender != owner) {
            revert Unauthorized(msg.sender);
        }
    }
}
// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.13;
import { NullAddrIsNotAnERC20Token, NullAddrIsNotAValidSpender, NoTransferToNullAddress, InvalidAmount, NativeValueWithERC, NativeAssetTransferFailed } from "../Errors/GenericErrors.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
/// @title LibAsset
/// @author Connext <[email protected]>
/// @notice This library contains helpers for dealing with onchain transfers
///         of assets, including accounting for the native asset `assetId`
///         conventions and any noncompliant ERC20 transfers
library LibAsset {
    uint256 private constant MAX_INT = type(uint256).max;
    address internal constant NULL_ADDRESS = 0x0000000000000000000000000000000000000000; //address(0)
    /// @dev All native assets use the empty address for their asset id
    ///      by convention
    address internal constant NATIVE_ASSETID = NULL_ADDRESS; //address(0)
    /// @notice Gets the balance of the inheriting contract for the given asset
    /// @param assetId The asset identifier to get the balance of
    /// @return Balance held by contracts using this library
    function getOwnBalance(address assetId) internal view returns (uint256) {
        return assetId == NATIVE_ASSETID ? address(this).balance : IERC20(assetId).balanceOf(address(this));
    }
    /// @notice Transfers ether from the inheriting contract to a given
    ///         recipient
    /// @param recipient Address to send ether to
    /// @param amount Amount to send to given recipient
    function transferNativeAsset(address payable recipient, uint256 amount) private {
        if (recipient == NULL_ADDRESS) revert NoTransferToNullAddress();
        // solhint-disable-next-line avoid-low-level-calls
        (bool success, ) = recipient.call{ value: amount }("");
        if (!success) revert NativeAssetTransferFailed();
    }
    /// @notice Gives MAX approval for another address to spend tokens
    /// @param assetId Token address to transfer
    /// @param spender Address to give spend approval to
    /// @param amount Amount to approve for spending
    function maxApproveERC20(
        IERC20 assetId,
        address spender,
        uint256 amount
    ) internal {
        if (address(assetId) == NATIVE_ASSETID) return;
        if (spender == NULL_ADDRESS) revert NullAddrIsNotAValidSpender();
        uint256 allowance = assetId.allowance(address(this), spender);
        if (allowance < amount) SafeERC20.safeApprove(IERC20(assetId), spender, MAX_INT);
    }
    /// @notice Transfers tokens from the inheriting contract to a given
    ///         recipient
    /// @param assetId Token address to transfer
    /// @param recipient Address to send token to
    /// @param amount Amount to send to given recipient
    function transferERC20(
        address assetId,
        address recipient,
        uint256 amount
    ) private {
        if (isNativeAsset(assetId)) revert NullAddrIsNotAnERC20Token();
        SafeERC20.safeTransfer(IERC20(assetId), recipient, amount);
    }
    /// @notice Transfers tokens from a sender to a given recipient
    /// @param assetId Token address to transfer
    /// @param from Address of sender/owner
    /// @param to Address of recipient/spender
    /// @param amount Amount to transfer from owner to spender
    function transferFromERC20(
        address assetId,
        address from,
        address to,
        uint256 amount
    ) internal {
        if (assetId == NATIVE_ASSETID) revert NullAddrIsNotAnERC20Token();
        if (to == NULL_ADDRESS) revert NoTransferToNullAddress();
        SafeERC20.safeTransferFrom(IERC20(assetId), from, to, amount);
    }
    /// @notice Deposits an asset into the contract and performs checks to avoid NativeValueWithERC
    /// @param tokenId Token to deposit
    /// @param amount Amount to deposit
    /// @param isNative Wether the token is native or ERC20
    function depositAsset(
        address tokenId,
        uint256 amount,
        bool isNative
    ) internal {
        if (amount == 0) revert InvalidAmount();
        if (isNative) {
            if (msg.value != amount) revert InvalidAmount();
        } else {
            if (msg.value != 0) revert NativeValueWithERC();
            uint256 _fromTokenBalance = LibAsset.getOwnBalance(tokenId);
            LibAsset.transferFromERC20(tokenId, msg.sender, address(this), amount);
            if (LibAsset.getOwnBalance(tokenId) - _fromTokenBalance != amount) revert InvalidAmount();
        }
    }
    /// @notice Overload for depositAsset(address tokenId, uint256 amount, bool isNative)
    /// @param tokenId Token to deposit
    /// @param amount Amount to deposit
    function depositAsset(address tokenId, uint256 amount) internal {
        return depositAsset(tokenId, amount, tokenId == NATIVE_ASSETID);
    }
    /// @notice Determines whether the given assetId is the native asset
    /// @param assetId The asset identifier to evaluate
    /// @return Boolean indicating if the asset is the native asset
    function isNativeAsset(address assetId) internal pure returns (bool) {
        return assetId == NATIVE_ASSETID;
    }
    /// @notice Wrapper function to transfer a given asset (native or erc20) to
    ///         some recipient. Should handle all non-compliant return value
    ///         tokens as well by using the SafeERC20 contract by open zeppelin.
    /// @param assetId Asset id for transfer (address(0) for native asset,
    ///                token address for erc20s)
    /// @param recipient Address to send asset to
    /// @param amount Amount to send to given recipient
    function transferAsset(
        address assetId,
        address payable recipient,
        uint256 amount
    ) internal {
        (assetId == NATIVE_ASSETID)
            ? transferNativeAsset(recipient, amount)
            : transferERC20(assetId, recipient, amount);
    }
    /// @dev Checks whether the given address is a contract and contains code
    function isContract(address _contractAddr) internal view returns (bool) {
        uint256 size;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            size := extcodesize(_contractAddr)
        }
        return size > 0;
    }
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.13;
error InvalidAmount();
error TokenAddressIsZero();
error CannotBridgeToSameNetwork();
error ZeroPostSwapBalance();
error InvalidBridgeConfigLength();
error NoSwapDataProvided();
error NativeValueWithERC();
error ContractCallNotAllowed();
error NullAddrIsNotAValidSpender();
error NullAddrIsNotAnERC20Token();
error NoTransferToNullAddress();
error NativeAssetTransferFailed();
error InvalidContract();
error InvalidConfig();
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../IERC20.sol";
import "../../../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;
    function safeTransfer(
        IERC20 token,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }
    function safeTransferFrom(
        IERC20 token,
        address from,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }
    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }
    function safeIncreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender) + value;
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }
    function safeDecreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            uint256 newAllowance = oldAllowance - value;
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
        }
    }
    /**
     * @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, "SafeERC20: low-level call failed");
        if (returndata.length > 0) {
            // Return data is optional
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);
    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);
    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount) 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 `amount` 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 amount) external returns (bool);
    /**
     * @dev Moves `amount` tokens from `sender` to `recipient` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) external returns (bool);
    /**
     * @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);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.
        uint256 size;
        assembly {
            size := extcodesize(account)
        }
        return size > 0;
    }
    /**
     * @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://diligence.consensys.net/posts/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/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");
        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }
    /**
     * @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, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * 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.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCall(target, data, "Address: low-level call failed");
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }
    /**
     * @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`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }
    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(success, returndata, errorMessage);
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }
    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // 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
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.17;
error TokenAddressIsZero();
error TokenNotSupported();
error CannotBridgeToSameNetwork();
error ZeroPostSwapBalance();
error NoSwapDataProvided();
error NativeValueWithERC();
error ContractCallNotAllowed();
error NullAddrIsNotAValidSpender();
error NullAddrIsNotAnERC20Token();
error NoTransferToNullAddress();
error NativeAssetTransferFailed();
error InvalidBridgeConfigLength();
error InvalidAmount();
error InvalidContract();
error InvalidConfig();
error UnsupportedChainId(uint256 chainId);
error InvalidReceiver();
error InvalidDestinationChain();
error InvalidSendingToken();
error InvalidCaller();
error AlreadyInitialized();
error NotInitialized();
error OnlyContractOwner();
error CannotAuthoriseSelf();
error RecoveryAddressCannotBeZero();
error CannotDepositNativeToken();
error InvalidCallData();
error NativeAssetNotSupported();
error UnAuthorized();
error NoSwapFromZeroBalance();
error InvalidFallbackAddress();
error CumulativeSlippageTooHigh(uint256 minAmount, uint256 receivedAmount);
error InsufficientBalance(uint256 required, uint256 balance);
error ZeroAmount();
error InvalidFee();
error InformationMismatch();
error NotAContract();
error NotEnoughBalance(uint256 requested, uint256 available);
// SPDX-License-Identifier: MIT
pragma solidity 0.8.17;
interface IDiamondCut {
    enum FacetCutAction {
        Add,
        Replace,
        Remove
    }
    // Add=0, Replace=1, Remove=2
    struct FacetCut {
        address facetAddress;
        FacetCutAction action;
        bytes4[] functionSelectors;
    }
    /// @notice Add/replace/remove any number of functions and optionally execute
    ///         a function with delegatecall
    /// @param _diamondCut Contains the facet addresses and function selectors
    /// @param _init The address of the contract or facet to execute _calldata
    /// @param _calldata A function call, including function selector and arguments
    ///                  _calldata is executed with delegatecall on _init
    function diamondCut(
        FacetCut[] calldata _diamondCut,
        address _init,
        bytes calldata _calldata
    ) external;
    event DiamondCut(FacetCut[] _diamondCut, address _init, bytes _calldata);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.17;
import { LibDiamond } from "./Libraries/LibDiamond.sol";
import { IDiamondCut } from "./Interfaces/IDiamondCut.sol";
import { LibUtil } from "./Libraries/LibUtil.sol";
contract LiFiDiamond {
    constructor(address _contractOwner, address _diamondCutFacet) payable {
        LibDiamond.setContractOwner(_contractOwner);
        // Add the diamondCut external function from the diamondCutFacet
        IDiamondCut.FacetCut[] memory cut = new IDiamondCut.FacetCut[](1);
        bytes4[] memory functionSelectors = new bytes4[](1);
        functionSelectors[0] = IDiamondCut.diamondCut.selector;
        cut[0] = IDiamondCut.FacetCut({
            facetAddress: _diamondCutFacet,
            action: IDiamondCut.FacetCutAction.Add,
            functionSelectors: functionSelectors
        });
        LibDiamond.diamondCut(cut, address(0), "");
    }
    // Find facet for function that is called and execute the
    // function if a facet is found and return any value.
    // solhint-disable-next-line no-complex-fallback
    fallback() external payable {
        LibDiamond.DiamondStorage storage ds;
        bytes32 position = LibDiamond.DIAMOND_STORAGE_POSITION;
        // get diamond storage
        // solhint-disable-next-line no-inline-assembly
        assembly {
            ds.slot := position
        }
        // get facet from function selector
        address facet = ds.selectorToFacetAndPosition[msg.sig].facetAddress;
        if (facet == address(0)) {
            revert LibDiamond.FunctionDoesNotExist();
        }
        // Execute external function from facet using delegatecall and return any value.
        // solhint-disable-next-line no-inline-assembly
        assembly {
            // copy function selector and any arguments
            calldatacopy(0, 0, calldatasize())
            // execute function call using the facet
            let result := delegatecall(gas(), facet, 0, calldatasize(), 0, 0)
            // get any return value
            returndatacopy(0, 0, returndatasize())
            // return any return value or error back to the caller
            switch result
            case 0 {
                revert(0, returndatasize())
            }
            default {
                return(0, returndatasize())
            }
        }
    }
    // Able to receive ether
    // solhint-disable-next-line no-empty-blocks
    receive() external payable {}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.17;
library LibBytes {
    // solhint-disable no-inline-assembly
    // LibBytes specific errors
    error SliceOverflow();
    error SliceOutOfBounds();
    error AddressOutOfBounds();
    error UintOutOfBounds();
    // -------------------------
    function concat(bytes memory _preBytes, bytes memory _postBytes) internal pure returns (bytes memory) {
        bytes memory tempBytes;
        assembly {
            // Get a location of some free memory and store it in tempBytes as
            // Solidity does for memory variables.
            tempBytes := mload(0x40)
            // Store the length of the first bytes array at the beginning of
            // the memory for tempBytes.
            let length := mload(_preBytes)
            mstore(tempBytes, length)
            // Maintain a memory counter for the current write location in the
            // temp bytes array by adding the 32 bytes for the array length to
            // the starting location.
            let mc := add(tempBytes, 0x20)
            // Stop copying when the memory counter reaches the length of the
            // first bytes array.
            let end := add(mc, length)
            for {
                // Initialize a copy counter to the start of the _preBytes data,
                // 32 bytes into its memory.
                let cc := add(_preBytes, 0x20)
            } lt(mc, end) {
                // Increase both counters by 32 bytes each iteration.
                mc := add(mc, 0x20)
                cc := add(cc, 0x20)
            } {
                // Write the _preBytes data into the tempBytes memory 32 bytes
                // at a time.
                mstore(mc, mload(cc))
            }
            // Add the length of _postBytes to the current length of tempBytes
            // and store it as the new length in the first 32 bytes of the
            // tempBytes memory.
            length := mload(_postBytes)
            mstore(tempBytes, add(length, mload(tempBytes)))
            // Move the memory counter back from a multiple of 0x20 to the
            // actual end of the _preBytes data.
            mc := end
            // Stop copying when the memory counter reaches the new combined
            // length of the arrays.
            end := add(mc, length)
            for {
                let cc := add(_postBytes, 0x20)
            } lt(mc, end) {
                mc := add(mc, 0x20)
                cc := add(cc, 0x20)
            } {
                mstore(mc, mload(cc))
            }
            // Update the free-memory pointer by padding our last write location
            // to 32 bytes: add 31 bytes to the end of tempBytes to move to the
            // next 32 byte block, then round down to the nearest multiple of
            // 32. If the sum of the length of the two arrays is zero then add
            // one before rounding down to leave a blank 32 bytes (the length block with 0).
            mstore(
                0x40,
                and(
                    add(add(end, iszero(add(length, mload(_preBytes)))), 31),
                    not(31) // Round down to the nearest 32 bytes.
                )
            )
        }
        return tempBytes;
    }
    function concatStorage(bytes storage _preBytes, bytes memory _postBytes) internal {
        assembly {
            // Read the first 32 bytes of _preBytes storage, which is the length
            // of the array. (We don't need to use the offset into the slot
            // because arrays use the entire slot.)
            let fslot := sload(_preBytes.slot)
            // Arrays of 31 bytes or less have an even value in their slot,
            // while longer arrays have an odd value. The actual length is
            // the slot divided by two for odd values, and the lowest order
            // byte divided by two for even values.
            // If the slot is even, bitwise and the slot with 255 and divide by
            // two to get the length. If the slot is odd, bitwise and the slot
            // with -1 and divide by two.
            let slength := div(and(fslot, sub(mul(0x100, iszero(and(fslot, 1))), 1)), 2)
            let mlength := mload(_postBytes)
            let newlength := add(slength, mlength)
            // slength can contain both the length and contents of the array
            // if length < 32 bytes so let's prepare for that
            // v. http://solidity.readthedocs.io/en/latest/miscellaneous.html#layout-of-state-variables-in-storage
            switch add(lt(slength, 32), lt(newlength, 32))
            case 2 {
                // Since the new array still fits in the slot, we just need to
                // update the contents of the slot.
                // uint256(bytes_storage) = uint256(bytes_storage) + uint256(bytes_memory) + new_length
                sstore(
                    _preBytes.slot,
                    // all the modifications to the slot are inside this
                    // next block
                    add(
                        // we can just add to the slot contents because the
                        // bytes we want to change are the LSBs
                        fslot,
                        add(
                            mul(
                                div(
                                    // load the bytes from memory
                                    mload(add(_postBytes, 0x20)),
                                    // zero all bytes to the right
                                    exp(0x100, sub(32, mlength))
                                ),
                                // and now shift left the number of bytes to
                                // leave space for the length in the slot
                                exp(0x100, sub(32, newlength))
                            ),
                            // increase length by the double of the memory
                            // bytes length
                            mul(mlength, 2)
                        )
                    )
                )
            }
            case 1 {
                // The stored value fits in the slot, but the combined value
                // will exceed it.
                // get the keccak hash to get the contents of the array
                mstore(0x0, _preBytes.slot)
                let sc := add(keccak256(0x0, 0x20), div(slength, 32))
                // save new length
                sstore(_preBytes.slot, add(mul(newlength, 2), 1))
                // The contents of the _postBytes array start 32 bytes into
                // the structure. Our first read should obtain the `submod`
                // bytes that can fit into the unused space in the last word
                // of the stored array. To get this, we read 32 bytes starting
                // from `submod`, so the data we read overlaps with the array
                // contents by `submod` bytes. Masking the lowest-order
                // `submod` bytes allows us to add that value directly to the
                // stored value.
                let submod := sub(32, slength)
                let mc := add(_postBytes, submod)
                let end := add(_postBytes, mlength)
                let mask := sub(exp(0x100, submod), 1)
                sstore(
                    sc,
                    add(
                        and(fslot, 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff00),
                        and(mload(mc), mask)
                    )
                )
                for {
                    mc := add(mc, 0x20)
                    sc := add(sc, 1)
                } lt(mc, end) {
                    sc := add(sc, 1)
                    mc := add(mc, 0x20)
                } {
                    sstore(sc, mload(mc))
                }
                mask := exp(0x100, sub(mc, end))
                sstore(sc, mul(div(mload(mc), mask), mask))
            }
            default {
                // get the keccak hash to get the contents of the array
                mstore(0x0, _preBytes.slot)
                // Start copying to the last used word of the stored array.
                let sc := add(keccak256(0x0, 0x20), div(slength, 32))
                // save new length
                sstore(_preBytes.slot, add(mul(newlength, 2), 1))
                // Copy over the first `submod` bytes of the new data as in
                // case 1 above.
                let slengthmod := mod(slength, 32)
                let submod := sub(32, slengthmod)
                let mc := add(_postBytes, submod)
                let end := add(_postBytes, mlength)
                let mask := sub(exp(0x100, submod), 1)
                sstore(sc, add(sload(sc), and(mload(mc), mask)))
                for {
                    sc := add(sc, 1)
                    mc := add(mc, 0x20)
                } lt(mc, end) {
                    sc := add(sc, 1)
                    mc := add(mc, 0x20)
                } {
                    sstore(sc, mload(mc))
                }
                mask := exp(0x100, sub(mc, end))
                sstore(sc, mul(div(mload(mc), mask), mask))
            }
        }
    }
    function slice(
        bytes memory _bytes,
        uint256 _start,
        uint256 _length
    ) internal pure returns (bytes memory) {
        if (_length + 31 < _length) revert SliceOverflow();
        if (_bytes.length < _start + _length) revert SliceOutOfBounds();
        bytes memory tempBytes;
        assembly {
            switch iszero(_length)
            case 0 {
                // Get a location of some free memory and store it in tempBytes as
                // Solidity does for memory variables.
                tempBytes := mload(0x40)
                // The first word of the slice result is potentially a partial
                // word read from the original array. To read it, we calculate
                // the length of that partial word and start copying that many
                // bytes into the array. The first word we copy will start with
                // data we don't care about, but the last `lengthmod` bytes will
                // land at the beginning of the contents of the new array. When
                // we're done copying, we overwrite the full first word with
                // the actual length of the slice.
                let lengthmod := and(_length, 31)
                // The multiplication in the next line is necessary
                // because when slicing multiples of 32 bytes (lengthmod == 0)
                // the following copy loop was copying the origin's length
                // and then ending prematurely not copying everything it should.
                let mc := add(add(tempBytes, lengthmod), mul(0x20, iszero(lengthmod)))
                let end := add(mc, _length)
                for {
                    // The multiplication in the next line has the same exact purpose
                    // as the one above.
                    let cc := add(add(add(_bytes, lengthmod), mul(0x20, iszero(lengthmod))), _start)
                } lt(mc, end) {
                    mc := add(mc, 0x20)
                    cc := add(cc, 0x20)
                } {
                    mstore(mc, mload(cc))
                }
                mstore(tempBytes, _length)
                //update free-memory pointer
                //allocating the array padded to 32 bytes like the compiler does now
                mstore(0x40, and(add(mc, 31), not(31)))
            }
            //if we want a zero-length slice let's just return a zero-length array
            default {
                tempBytes := mload(0x40)
                //zero out the 32 bytes slice we are about to return
                //we need to do it because Solidity does not garbage collect
                mstore(tempBytes, 0)
                mstore(0x40, add(tempBytes, 0x20))
            }
        }
        return tempBytes;
    }
    function toAddress(bytes memory _bytes, uint256 _start) internal pure returns (address) {
        if (_bytes.length < _start + 20) {
            revert AddressOutOfBounds();
        }
        address tempAddress;
        assembly {
            tempAddress := div(mload(add(add(_bytes, 0x20), _start)), 0x1000000000000000000000000)
        }
        return tempAddress;
    }
    function toUint8(bytes memory _bytes, uint256 _start) internal pure returns (uint8) {
        if (_bytes.length < _start + 1) {
            revert UintOutOfBounds();
        }
        uint8 tempUint;
        assembly {
            tempUint := mload(add(add(_bytes, 0x1), _start))
        }
        return tempUint;
    }
    function toUint16(bytes memory _bytes, uint256 _start) internal pure returns (uint16) {
        if (_bytes.length < _start + 2) {
            revert UintOutOfBounds();
        }
        uint16 tempUint;
        assembly {
            tempUint := mload(add(add(_bytes, 0x2), _start))
        }
        return tempUint;
    }
    function toUint32(bytes memory _bytes, uint256 _start) internal pure returns (uint32) {
        if (_bytes.length < _start + 4) {
            revert UintOutOfBounds();
        }
        uint32 tempUint;
        assembly {
            tempUint := mload(add(add(_bytes, 0x4), _start))
        }
        return tempUint;
    }
    function toUint64(bytes memory _bytes, uint256 _start) internal pure returns (uint64) {
        if (_bytes.length < _start + 8) {
            revert UintOutOfBounds();
        }
        uint64 tempUint;
        assembly {
            tempUint := mload(add(add(_bytes, 0x8), _start))
        }
        return tempUint;
    }
    function toUint96(bytes memory _bytes, uint256 _start) internal pure returns (uint96) {
        if (_bytes.length < _start + 12) {
            revert UintOutOfBounds();
        }
        uint96 tempUint;
        assembly {
            tempUint := mload(add(add(_bytes, 0xc), _start))
        }
        return tempUint;
    }
    function toUint128(bytes memory _bytes, uint256 _start) internal pure returns (uint128) {
        if (_bytes.length < _start + 16) {
            revert UintOutOfBounds();
        }
        uint128 tempUint;
        assembly {
            tempUint := mload(add(add(_bytes, 0x10), _start))
        }
        return tempUint;
    }
    function toUint256(bytes memory _bytes, uint256 _start) internal pure returns (uint256) {
        if (_bytes.length < _start + 32) {
            revert UintOutOfBounds();
        }
        uint256 tempUint;
        assembly {
            tempUint := mload(add(add(_bytes, 0x20), _start))
        }
        return tempUint;
    }
    function toBytes32(bytes memory _bytes, uint256 _start) internal pure returns (bytes32) {
        if (_bytes.length < _start + 32) {
            revert UintOutOfBounds();
        }
        bytes32 tempBytes32;
        assembly {
            tempBytes32 := mload(add(add(_bytes, 0x20), _start))
        }
        return tempBytes32;
    }
    function equal(bytes memory _preBytes, bytes memory _postBytes) internal pure returns (bool) {
        bool success = true;
        assembly {
            let length := mload(_preBytes)
            // if lengths don't match the arrays are not equal
            switch eq(length, mload(_postBytes))
            case 1 {
                // cb is a circuit breaker in the for loop since there's
                //  no said feature for inline assembly loops
                // cb = 1 - don't breaker
                // cb = 0 - break
                let cb := 1
                let mc := add(_preBytes, 0x20)
                let end := add(mc, length)
                for {
                    let cc := add(_postBytes, 0x20)
                    // the next line is the loop condition:
                    // while(uint256(mc < end) + cb == 2)
                } eq(add(lt(mc, end), cb), 2) {
                    mc := add(mc, 0x20)
                    cc := add(cc, 0x20)
                } {
                    // if any of these checks fails then arrays are not equal
                    if iszero(eq(mload(mc), mload(cc))) {
                        // unsuccess:
                        success := 0
                        cb := 0
                    }
                }
            }
            default {
                // unsuccess:
                success := 0
            }
        }
        return success;
    }
    function equalStorage(bytes storage _preBytes, bytes memory _postBytes) internal view returns (bool) {
        bool success = true;
        assembly {
            // we know _preBytes_offset is 0
            let fslot := sload(_preBytes.slot)
            // Decode the length of the stored array like in concatStorage().
            let slength := div(and(fslot, sub(mul(0x100, iszero(and(fslot, 1))), 1)), 2)
            let mlength := mload(_postBytes)
            // if lengths don't match the arrays are not equal
            switch eq(slength, mlength)
            case 1 {
                // slength can contain both the length and contents of the array
                // if length < 32 bytes so let's prepare for that
                // v. http://solidity.readthedocs.io/en/latest/miscellaneous.html#layout-of-state-variables-in-storage
                if iszero(iszero(slength)) {
                    switch lt(slength, 32)
                    case 1 {
                        // blank the last byte which is the length
                        fslot := mul(div(fslot, 0x100), 0x100)
                        if iszero(eq(fslot, mload(add(_postBytes, 0x20)))) {
                            // unsuccess:
                            success := 0
                        }
                    }
                    default {
                        // cb is a circuit breaker in the for loop since there's
                        //  no said feature for inline assembly loops
                        // cb = 1 - don't breaker
                        // cb = 0 - break
                        let cb := 1
                        // get the keccak hash to get the contents of the array
                        mstore(0x0, _preBytes.slot)
                        let sc := keccak256(0x0, 0x20)
                        let mc := add(_postBytes, 0x20)
                        let end := add(mc, mlength)
                        // the next line is the loop condition:
                        // while(uint256(mc < end) + cb == 2)
                        // solhint-disable-next-line no-empty-blocks
                        for {
                        } eq(add(lt(mc, end), cb), 2) {
                            sc := add(sc, 1)
                            mc := add(mc, 0x20)
                        } {
                            if iszero(eq(sload(sc), mload(mc))) {
                                // unsuccess:
                                success := 0
                                cb := 0
                            }
                        }
                    }
                }
            }
            default {
                // unsuccess:
                success := 0
            }
        }
        return success;
    }
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.17;
import { IDiamondCut } from "../Interfaces/IDiamondCut.sol";
import { LibUtil } from "../Libraries/LibUtil.sol";
import { OnlyContractOwner } from "../Errors/GenericErrors.sol";
/// Implementation of EIP-2535 Diamond Standard
/// https://eips.ethereum.org/EIPS/eip-2535
library LibDiamond {
    bytes32 internal constant DIAMOND_STORAGE_POSITION = keccak256("diamond.standard.diamond.storage");
    // Diamond specific errors
    error IncorrectFacetCutAction();
    error NoSelectorsInFace();
    error FunctionAlreadyExists();
    error FacetAddressIsZero();
    error FacetAddressIsNotZero();
    error FacetContainsNoCode();
    error FunctionDoesNotExist();
    error FunctionIsImmutable();
    error InitZeroButCalldataNotEmpty();
    error CalldataEmptyButInitNotZero();
    error InitReverted();
    // ----------------
    struct FacetAddressAndPosition {
        address facetAddress;
        uint96 functionSelectorPosition; // position in facetFunctionSelectors.functionSelectors array
    }
    struct FacetFunctionSelectors {
        bytes4[] functionSelectors;
        uint256 facetAddressPosition; // position of facetAddress in facetAddresses array
    }
    struct DiamondStorage {
        // maps function selector to the facet address and
        // the position of the selector in the facetFunctionSelectors.selectors array
        mapping(bytes4 => FacetAddressAndPosition) selectorToFacetAndPosition;
        // maps facet addresses to function selectors
        mapping(address => FacetFunctionSelectors) facetFunctionSelectors;
        // facet addresses
        address[] facetAddresses;
        // Used to query if a contract implements an interface.
        // Used to implement ERC-165.
        mapping(bytes4 => bool) supportedInterfaces;
        // owner of the contract
        address contractOwner;
    }
    function diamondStorage() internal pure returns (DiamondStorage storage ds) {
        bytes32 position = DIAMOND_STORAGE_POSITION;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            ds.slot := position
        }
    }
    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
    function setContractOwner(address _newOwner) internal {
        DiamondStorage storage ds = diamondStorage();
        address previousOwner = ds.contractOwner;
        ds.contractOwner = _newOwner;
        emit OwnershipTransferred(previousOwner, _newOwner);
    }
    function contractOwner() internal view returns (address contractOwner_) {
        contractOwner_ = diamondStorage().contractOwner;
    }
    function enforceIsContractOwner() internal view {
        if (msg.sender != diamondStorage().contractOwner) revert OnlyContractOwner();
    }
    event DiamondCut(IDiamondCut.FacetCut[] _diamondCut, address _init, bytes _calldata);
    // Internal function version of diamondCut
    function diamondCut(
        IDiamondCut.FacetCut[] memory _diamondCut,
        address _init,
        bytes memory _calldata
    ) internal {
        for (uint256 facetIndex; facetIndex < _diamondCut.length; ) {
            IDiamondCut.FacetCutAction action = _diamondCut[facetIndex].action;
            if (action == IDiamondCut.FacetCutAction.Add) {
                addFunctions(_diamondCut[facetIndex].facetAddress, _diamondCut[facetIndex].functionSelectors);
            } else if (action == IDiamondCut.FacetCutAction.Replace) {
                replaceFunctions(_diamondCut[facetIndex].facetAddress, _diamondCut[facetIndex].functionSelectors);
            } else if (action == IDiamondCut.FacetCutAction.Remove) {
                removeFunctions(_diamondCut[facetIndex].facetAddress, _diamondCut[facetIndex].functionSelectors);
            } else {
                revert IncorrectFacetCutAction();
            }
            unchecked {
                ++facetIndex;
            }
        }
        emit DiamondCut(_diamondCut, _init, _calldata);
        initializeDiamondCut(_init, _calldata);
    }
    function addFunctions(address _facetAddress, bytes4[] memory _functionSelectors) internal {
        if (_functionSelectors.length == 0) {
            revert NoSelectorsInFace();
        }
        DiamondStorage storage ds = diamondStorage();
        if (LibUtil.isZeroAddress(_facetAddress)) {
            revert FacetAddressIsZero();
        }
        uint96 selectorPosition = uint96(ds.facetFunctionSelectors[_facetAddress].functionSelectors.length);
        // add new facet address if it does not exist
        if (selectorPosition == 0) {
            addFacet(ds, _facetAddress);
        }
        for (uint256 selectorIndex; selectorIndex < _functionSelectors.length; ) {
            bytes4 selector = _functionSelectors[selectorIndex];
            address oldFacetAddress = ds.selectorToFacetAndPosition[selector].facetAddress;
            if (!LibUtil.isZeroAddress(oldFacetAddress)) {
                revert FunctionAlreadyExists();
            }
            addFunction(ds, selector, selectorPosition, _facetAddress);
            unchecked {
                ++selectorPosition;
                ++selectorIndex;
            }
        }
    }
    function replaceFunctions(address _facetAddress, bytes4[] memory _functionSelectors) internal {
        if (_functionSelectors.length == 0) {
            revert NoSelectorsInFace();
        }
        DiamondStorage storage ds = diamondStorage();
        if (LibUtil.isZeroAddress(_facetAddress)) {
            revert FacetAddressIsZero();
        }
        uint96 selectorPosition = uint96(ds.facetFunctionSelectors[_facetAddress].functionSelectors.length);
        // add new facet address if it does not exist
        if (selectorPosition == 0) {
            addFacet(ds, _facetAddress);
        }
        for (uint256 selectorIndex; selectorIndex < _functionSelectors.length; ) {
            bytes4 selector = _functionSelectors[selectorIndex];
            address oldFacetAddress = ds.selectorToFacetAndPosition[selector].facetAddress;
            if (oldFacetAddress == _facetAddress) {
                revert FunctionAlreadyExists();
            }
            removeFunction(ds, oldFacetAddress, selector);
            addFunction(ds, selector, selectorPosition, _facetAddress);
            unchecked {
                ++selectorPosition;
                ++selectorIndex;
            }
        }
    }
    function removeFunctions(address _facetAddress, bytes4[] memory _functionSelectors) internal {
        if (_functionSelectors.length == 0) {
            revert NoSelectorsInFace();
        }
        DiamondStorage storage ds = diamondStorage();
        // if function does not exist then do nothing and return
        if (!LibUtil.isZeroAddress(_facetAddress)) {
            revert FacetAddressIsNotZero();
        }
        for (uint256 selectorIndex; selectorIndex < _functionSelectors.length; ) {
            bytes4 selector = _functionSelectors[selectorIndex];
            address oldFacetAddress = ds.selectorToFacetAndPosition[selector].facetAddress;
            removeFunction(ds, oldFacetAddress, selector);
            unchecked {
                ++selectorIndex;
            }
        }
    }
    function addFacet(DiamondStorage storage ds, address _facetAddress) internal {
        enforceHasContractCode(_facetAddress);
        ds.facetFunctionSelectors[_facetAddress].facetAddressPosition = ds.facetAddresses.length;
        ds.facetAddresses.push(_facetAddress);
    }
    function addFunction(
        DiamondStorage storage ds,
        bytes4 _selector,
        uint96 _selectorPosition,
        address _facetAddress
    ) internal {
        ds.selectorToFacetAndPosition[_selector].functionSelectorPosition = _selectorPosition;
        ds.facetFunctionSelectors[_facetAddress].functionSelectors.push(_selector);
        ds.selectorToFacetAndPosition[_selector].facetAddress = _facetAddress;
    }
    function removeFunction(
        DiamondStorage storage ds,
        address _facetAddress,
        bytes4 _selector
    ) internal {
        if (LibUtil.isZeroAddress(_facetAddress)) {
            revert FunctionDoesNotExist();
        }
        // an immutable function is a function defined directly in a diamond
        if (_facetAddress == address(this)) {
            revert FunctionIsImmutable();
        }
        // replace selector with last selector, then delete last selector
        uint256 selectorPosition = ds.selectorToFacetAndPosition[_selector].functionSelectorPosition;
        uint256 lastSelectorPosition = ds.facetFunctionSelectors[_facetAddress].functionSelectors.length - 1;
        // if not the same then replace _selector with lastSelector
        if (selectorPosition != lastSelectorPosition) {
            bytes4 lastSelector = ds.facetFunctionSelectors[_facetAddress].functionSelectors[lastSelectorPosition];
            ds.facetFunctionSelectors[_facetAddress].functionSelectors[selectorPosition] = lastSelector;
            ds.selectorToFacetAndPosition[lastSelector].functionSelectorPosition = uint96(selectorPosition);
        }
        // delete the last selector
        ds.facetFunctionSelectors[_facetAddress].functionSelectors.pop();
        delete ds.selectorToFacetAndPosition[_selector];
        // if no more selectors for facet address then delete the facet address
        if (lastSelectorPosition == 0) {
            // replace facet address with last facet address and delete last facet address
            uint256 lastFacetAddressPosition = ds.facetAddresses.length - 1;
            uint256 facetAddressPosition = ds.facetFunctionSelectors[_facetAddress].facetAddressPosition;
            if (facetAddressPosition != lastFacetAddressPosition) {
                address lastFacetAddress = ds.facetAddresses[lastFacetAddressPosition];
                ds.facetAddresses[facetAddressPosition] = lastFacetAddress;
                ds.facetFunctionSelectors[lastFacetAddress].facetAddressPosition = facetAddressPosition;
            }
            ds.facetAddresses.pop();
            delete ds.facetFunctionSelectors[_facetAddress].facetAddressPosition;
        }
    }
    function initializeDiamondCut(address _init, bytes memory _calldata) internal {
        if (LibUtil.isZeroAddress(_init)) {
            if (_calldata.length != 0) {
                revert InitZeroButCalldataNotEmpty();
            }
        } else {
            if (_calldata.length == 0) {
                revert CalldataEmptyButInitNotZero();
            }
            if (_init != address(this)) {
                enforceHasContractCode(_init);
            }
            // solhint-disable-next-line avoid-low-level-calls
            (bool success, bytes memory error) = _init.delegatecall(_calldata);
            if (!success) {
                if (error.length > 0) {
                    // bubble up the error
                    revert(string(error));
                } else {
                    revert InitReverted();
                }
            }
        }
    }
    function enforceHasContractCode(address _contract) internal view {
        uint256 contractSize;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            contractSize := extcodesize(_contract)
        }
        if (contractSize == 0) {
            revert FacetContainsNoCode();
        }
    }
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.17;
import "./LibBytes.sol";
library LibUtil {
    using LibBytes for bytes;
    function getRevertMsg(bytes memory _res) internal pure returns (string memory) {
        // If the _res length is less than 68, then the transaction failed silently (without a revert message)
        if (_res.length < 68) return "Transaction reverted silently";
        bytes memory revertData = _res.slice(4, _res.length - 4); // Remove the selector which is the first 4 bytes
        return abi.decode(revertData, (string)); // All that remains is the revert string
    }
    /// @notice Determines whether the given address is the zero address
    /// @param addr The address to verify
    /// @return Boolean indicating if the address is the zero address
    function isZeroAddress(address addr) internal pure returns (bool) {
        return addr == address(0);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.23;
contract RelayReceiver {
    // --- Structs ---
    struct Call {
        address to;
        bytes data;
        uint256 value;
    }
    // --- Errors ---
    error CallFailed();
    error NativeTransferFailed();
    error Unauthorized();
    // --- Events ---
    event FundsForwardedWithData(bytes data);
    // --- Fields ---
    address private immutable SOLVER;
    // --- Constructor ---
    constructor(address solver) {
        SOLVER = solver;
    }
    // --- Public methods ---
    fallback() external payable {
        send(SOLVER, msg.value);
        emit FundsForwardedWithData(msg.data);
    }
    function forward(bytes calldata data) external payable {
        send(SOLVER, msg.value);
        emit FundsForwardedWithData(data);
    }
    // --- Restricted methods ---
    function makeCalls(Call[] calldata calls) external payable {
        if (msg.sender != SOLVER) {
            revert Unauthorized();
        }
        unchecked {
            uint256 length = calls.length;
            for (uint256 i; i < length; i++) {
                Call memory c = calls[i];
                (bool success, ) = c.to.call{value: c.value}(c.data);
                if (!success) {
                    revert CallFailed();
                }
            }
        }
    }
    // --- Internal methods ---
    function send(address to, uint256 value) internal {
        bool success;
        assembly {
            // Save gas by avoiding copying the return data to memory.
            // Provide at most 100k gas to the internal call, which is
            // more than enough to cover common use-cases of logic for
            // receiving native tokens (eg. SCW payable fallbacks).
            success := call(100000, to, value, 0, 0, 0, 0)
        }
        if (!success) {
            revert NativeTransferFailed();
        }
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.17;
import { ILiFi } from "../Interfaces/ILiFi.sol";
import { LibAsset } from "../Libraries/LibAsset.sol";
import { LibSwap } from "../Libraries/LibSwap.sol";
import { LibUtil } from "../Libraries/LibUtil.sol";
import { ReentrancyGuard } from "../Helpers/ReentrancyGuard.sol";
import { SwapperV2 } from "../Helpers/SwapperV2.sol";
import { Validatable } from "../Helpers/Validatable.sol";
import { ECDSA } from "solady/utils/ECDSA.sol";
/// @title Relay Facet
/// @author LI.FI (https://li.fi)
/// @notice Provides functionality for bridging through Relay Protocol
/// @custom:version 1.0.0
contract RelayFacet is ILiFi, ReentrancyGuard, SwapperV2, Validatable {
    // Receiver for native transfers
    address public immutable relayReceiver;
    // Relayer wallet for ERC20 transfers
    address public immutable relaySolver;
    /// Storage ///
    mapping(bytes32 => bool) public consumedIds;
    /// Types ///
    /// @dev Relay specific parameters
    /// @param requestId Relay API request ID
    /// @param nonEVMReceiver set only if bridging to non-EVM chain
    /// @params receivingAssetId address of receiving asset
    /// @params signature attestation signature provided by the Relay solver
    struct RelayData {
        bytes32 requestId;
        bytes32 nonEVMReceiver;
        bytes32 receivingAssetId;
        bytes signature;
    }
    /// Events ///
    event BridgeToNonEVMChain(
        bytes32 indexed transactionId,
        uint256 indexed destinationChainId,
        bytes32 receiver
    );
    /// Errors ///
    error InvalidQuote();
    /// Modifiers ///
    /// @param _bridgeData The core information needed for bridging
    /// @param _relayData Data specific to Relay
    modifier onlyValidQuote(
        ILiFi.BridgeData memory _bridgeData,
        RelayData calldata _relayData
    ) {
        // Ensure that the id isn't already consumed
        if (consumedIds[_relayData.requestId]) {
            revert InvalidQuote();
        }
        // Ensure nonEVMAddress is not empty
        if (
            _bridgeData.receiver == LibAsset.NON_EVM_ADDRESS &&
            _relayData.nonEVMReceiver == bytes32(0)
        ) {
            revert InvalidQuote();
        }
        // Verify that the bridging quote has been signed by the Relay solver
        // as attested using the attestation API
        // API URL: https://api.relay.link/requests/{requestId}/signature/v2
        bytes32 message = ECDSA.toEthSignedMessageHash(
            keccak256(
                abi.encodePacked(
                    _relayData.requestId,
                    block.chainid,
                    bytes32(uint256(uint160(address(this)))),
                    bytes32(uint256(uint160(_bridgeData.sendingAssetId))),
                    _getMappedChainId(_bridgeData.destinationChainId),
                    _bridgeData.receiver == LibAsset.NON_EVM_ADDRESS
                        ? _relayData.nonEVMReceiver
                        : bytes32(uint256(uint160(_bridgeData.receiver))),
                    _relayData.receivingAssetId
                )
            )
        );
        address signer = ECDSA.recover(message, _relayData.signature);
        if (signer != relaySolver) {
            revert InvalidQuote();
        }
        _;
    }
    /// Constructor ///
    /// @param _relayReceiver The receiver for native transfers
    /// @param _relaySolver The relayer wallet for ERC20 transfers
    constructor(address _relayReceiver, address _relaySolver) {
        relayReceiver = _relayReceiver;
        relaySolver = _relaySolver;
    }
    /// External Methods ///
    /// @notice Bridges tokens via Relay
    /// @param _bridgeData The core information needed for bridging
    /// @param _relayData Data specific to Relay
    function startBridgeTokensViaRelay(
        ILiFi.BridgeData calldata _bridgeData,
        RelayData calldata _relayData
    )
        external
        payable
        nonReentrant
        onlyValidQuote(_bridgeData, _relayData)
        refundExcessNative(payable(msg.sender))
        validateBridgeData(_bridgeData)
        doesNotContainSourceSwaps(_bridgeData)
        doesNotContainDestinationCalls(_bridgeData)
    {
        LibAsset.depositAsset(
            _bridgeData.sendingAssetId,
            _bridgeData.minAmount
        );
        _startBridge(_bridgeData, _relayData);
    }
    /// @notice Performs a swap before bridging via Relay
    /// @param _bridgeData The core information needed for bridging
    /// @param _swapData An array of swap related data for performing swaps before bridging
    /// @param _relayData Data specific to Relay
    function swapAndStartBridgeTokensViaRelay(
        ILiFi.BridgeData memory _bridgeData,
        LibSwap.SwapData[] calldata _swapData,
        RelayData calldata _relayData
    )
        external
        payable
        nonReentrant
        onlyValidQuote(_bridgeData, _relayData)
        refundExcessNative(payable(msg.sender))
        containsSourceSwaps(_bridgeData)
        doesNotContainDestinationCalls(_bridgeData)
        validateBridgeData(_bridgeData)
    {
        _bridgeData.minAmount = _depositAndSwap(
            _bridgeData.transactionId,
            _bridgeData.minAmount,
            _swapData,
            payable(msg.sender)
        );
        _startBridge(_bridgeData, _relayData);
    }
    /// Internal Methods ///
    /// @dev Contains the business logic for the bridge via Relay
    /// @param _bridgeData The core information needed for bridging
    /// @param _relayData Data specific to Relay
    function _startBridge(
        ILiFi.BridgeData memory _bridgeData,
        RelayData calldata _relayData
    ) internal {
        // check if sendingAsset is native or ERC20
        if (LibAsset.isNativeAsset(_bridgeData.sendingAssetId)) {
            // Native
            // Send Native to relayReceiver along with requestId as extra data
            (bool success, bytes memory reason) = relayReceiver.call{
                value: _bridgeData.minAmount
            }(abi.encode(_relayData.requestId));
            if (!success) {
                revert(LibUtil.getRevertMsg(reason));
            }
        } else {
            // ERC20
            // We build the calldata from scratch to ensure that we can only
            // send to the solver address
            bytes memory transferCallData = bytes.concat(
                abi.encodeWithSignature(
                    "transfer(address,uint256)",
                    relaySolver,
                    _bridgeData.minAmount
                ),
                abi.encode(_relayData.requestId)
            );
            (bool success, bytes memory reason) = address(
                _bridgeData.sendingAssetId
            ).call(transferCallData);
            if (!success) {
                revert(LibUtil.getRevertMsg(reason));
            }
        }
        consumedIds[_relayData.requestId] = true;
        // Emit special event if bridging to non-EVM chain
        if (_bridgeData.receiver == LibAsset.NON_EVM_ADDRESS) {
            emit BridgeToNonEVMChain(
                _bridgeData.transactionId,
                _getMappedChainId(_bridgeData.destinationChainId),
                _relayData.nonEVMReceiver
            );
        }
        emit LiFiTransferStarted(_bridgeData);
    }
    /// @notice get Relay specific chain id for non-EVM chains
    ///         IDs found here  https://li.quest/v1/chains?chainTypes=UTXO,SVM
    /// @param chainId LIFI specific chain id
    function _getMappedChainId(
        uint256 chainId
    ) internal pure returns (uint256) {
        // Bitcoin
        if (chainId == 20000000000001) {
            return 8253038;
        }
        // Solana
        if (chainId == 1151111081099710) {
            return 792703809;
        }
        return chainId;
    }
}
// SPDX-License-Identifier: MIT
/// @custom:version 1.0.0
pragma solidity ^0.8.17;
interface ILiFi {
    /// Structs ///
    struct BridgeData {
        bytes32 transactionId;
        string bridge;
        string integrator;
        address referrer;
        address sendingAssetId;
        address receiver;
        uint256 minAmount;
        uint256 destinationChainId;
        bool hasSourceSwaps;
        bool hasDestinationCall;
    }
    /// Events ///
    event LiFiTransferStarted(ILiFi.BridgeData bridgeData);
    event LiFiTransferCompleted(
        bytes32 indexed transactionId,
        address receivingAssetId,
        address receiver,
        uint256 amount,
        uint256 timestamp
    );
    event LiFiTransferRecovered(
        bytes32 indexed transactionId,
        address receivingAssetId,
        address receiver,
        uint256 amount,
        uint256 timestamp
    );
    event LiFiGenericSwapCompleted(
        bytes32 indexed transactionId,
        string integrator,
        string referrer,
        address receiver,
        address fromAssetId,
        address toAssetId,
        uint256 fromAmount,
        uint256 toAmount
    );
    // Deprecated but kept here to include in ABI to parse historic events
    event LiFiSwappedGeneric(
        bytes32 indexed transactionId,
        string integrator,
        string referrer,
        address fromAssetId,
        address toAssetId,
        uint256 fromAmount,
        uint256 toAmount
    );
}
// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.17;
import { InsufficientBalance, NullAddrIsNotAnERC20Token, NullAddrIsNotAValidSpender, NoTransferToNullAddress, InvalidAmount, NativeAssetTransferFailed } from "../Errors/GenericErrors.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import { LibSwap } from "./LibSwap.sol";
/// @title LibAsset
/// @custom:version 1.0.1
/// @notice This library contains helpers for dealing with onchain transfers
///         of assets, including accounting for the native asset `assetId`
///         conventions and any noncompliant ERC20 transfers
library LibAsset {
    uint256 private constant MAX_UINT = type(uint256).max;
    address internal constant NULL_ADDRESS = address(0);
    address internal constant NON_EVM_ADDRESS =
        0x11f111f111f111F111f111f111F111f111f111F1;
    /// @dev All native assets use the empty address for their asset id
    ///      by convention
    address internal constant NATIVE_ASSETID = NULL_ADDRESS; //address(0)
    /// @notice Gets the balance of the inheriting contract for the given asset
    /// @param assetId The asset identifier to get the balance of
    /// @return Balance held by contracts using this library
    function getOwnBalance(address assetId) internal view returns (uint256) {
        return
            isNativeAsset(assetId)
                ? address(this).balance
                : IERC20(assetId).balanceOf(address(this));
    }
    /// @notice Transfers ether from the inheriting contract to a given
    ///         recipient
    /// @param recipient Address to send ether to
    /// @param amount Amount to send to given recipient
    function transferNativeAsset(
        address payable recipient,
        uint256 amount
    ) private {
        if (recipient == NULL_ADDRESS) revert NoTransferToNullAddress();
        if (amount > address(this).balance)
            revert InsufficientBalance(amount, address(this).balance);
        // solhint-disable-next-line avoid-low-level-calls
        (bool success, ) = recipient.call{ value: amount }("");
        if (!success) revert NativeAssetTransferFailed();
    }
    /// @notice If the current allowance is insufficient, the allowance for a given spender
    /// is set to MAX_UINT.
    /// @param assetId Token address to transfer
    /// @param spender Address to give spend approval to
    /// @param amount Amount to approve for spending
    function maxApproveERC20(
        IERC20 assetId,
        address spender,
        uint256 amount
    ) internal {
        if (isNativeAsset(address(assetId))) {
            return;
        }
        if (spender == NULL_ADDRESS) {
            revert NullAddrIsNotAValidSpender();
        }
        if (assetId.allowance(address(this), spender) < amount) {
            SafeERC20.safeApprove(IERC20(assetId), spender, 0);
            SafeERC20.safeApprove(IERC20(assetId), spender, MAX_UINT);
        }
    }
    /// @notice Transfers tokens from the inheriting contract to a given
    ///         recipient
    /// @param assetId Token address to transfer
    /// @param recipient Address to send token to
    /// @param amount Amount to send to given recipient
    function transferERC20(
        address assetId,
        address recipient,
        uint256 amount
    ) private {
        if (isNativeAsset(assetId)) {
            revert NullAddrIsNotAnERC20Token();
        }
        if (recipient == NULL_ADDRESS) {
            revert NoTransferToNullAddress();
        }
        uint256 assetBalance = IERC20(assetId).balanceOf(address(this));
        if (amount > assetBalance) {
            revert InsufficientBalance(amount, assetBalance);
        }
        SafeERC20.safeTransfer(IERC20(assetId), recipient, amount);
    }
    /// @notice Transfers tokens from a sender to a given recipient
    /// @param assetId Token address to transfer
    /// @param from Address of sender/owner
    /// @param to Address of recipient/spender
    /// @param amount Amount to transfer from owner to spender
    function transferFromERC20(
        address assetId,
        address from,
        address to,
        uint256 amount
    ) internal {
        if (isNativeAsset(assetId)) {
            revert NullAddrIsNotAnERC20Token();
        }
        if (to == NULL_ADDRESS) {
            revert NoTransferToNullAddress();
        }
        IERC20 asset = IERC20(assetId);
        uint256 prevBalance = asset.balanceOf(to);
        SafeERC20.safeTransferFrom(asset, from, to, amount);
        if (asset.balanceOf(to) - prevBalance != amount) {
            revert InvalidAmount();
        }
    }
    function depositAsset(address assetId, uint256 amount) internal {
        if (amount == 0) revert InvalidAmount();
        if (isNativeAsset(assetId)) {
            if (msg.value < amount) revert InvalidAmount();
        } else {
            uint256 balance = IERC20(assetId).balanceOf(msg.sender);
            if (balance < amount) revert InsufficientBalance(amount, balance);
            transferFromERC20(assetId, msg.sender, address(this), amount);
        }
    }
    function depositAssets(LibSwap.SwapData[] calldata swaps) internal {
        for (uint256 i = 0; i < swaps.length; ) {
            LibSwap.SwapData calldata swap = swaps[i];
            if (swap.requiresDeposit) {
                depositAsset(swap.sendingAssetId, swap.fromAmount);
            }
            unchecked {
                i++;
            }
        }
    }
    /// @notice Determines whether the given assetId is the native asset
    /// @param assetId The asset identifier to evaluate
    /// @return Boolean indicating if the asset is the native asset
    function isNativeAsset(address assetId) internal pure returns (bool) {
        return assetId == NATIVE_ASSETID;
    }
    /// @notice Wrapper function to transfer a given asset (native or erc20) to
    ///         some recipient. Should handle all non-compliant return value
    ///         tokens as well by using the SafeERC20 contract by open zeppelin.
    /// @param assetId Asset id for transfer (address(0) for native asset,
    ///                token address for erc20s)
    /// @param recipient Address to send asset to
    /// @param amount Amount to send to given recipient
    function transferAsset(
        address assetId,
        address payable recipient,
        uint256 amount
    ) internal {
        isNativeAsset(assetId)
            ? transferNativeAsset(recipient, amount)
            : transferERC20(assetId, recipient, amount);
    }
    /// @dev Checks whether the given address is a contract and contains code
    function isContract(address _contractAddr) internal view returns (bool) {
        uint256 size;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            size := extcodesize(_contractAddr)
        }
        return size > 0;
    }
}
// SPDX-License-Identifier: MIT
/// @custom:version 1.0.0
pragma solidity ^0.8.17;
import { LibAsset } from "./LibAsset.sol";
import { LibUtil } from "./LibUtil.sol";
import { InvalidContract, NoSwapFromZeroBalance, InsufficientBalance } from "../Errors/GenericErrors.sol";
import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
library LibSwap {
    struct SwapData {
        address callTo;
        address approveTo;
        address sendingAssetId;
        address receivingAssetId;
        uint256 fromAmount;
        bytes callData;
        bool requiresDeposit;
    }
    event AssetSwapped(
        bytes32 transactionId,
        address dex,
        address fromAssetId,
        address toAssetId,
        uint256 fromAmount,
        uint256 toAmount,
        uint256 timestamp
    );
    function swap(bytes32 transactionId, SwapData calldata _swap) internal {
        if (!LibAsset.isContract(_swap.callTo)) revert InvalidContract();
        uint256 fromAmount = _swap.fromAmount;
        if (fromAmount == 0) revert NoSwapFromZeroBalance();
        uint256 nativeValue = LibAsset.isNativeAsset(_swap.sendingAssetId)
            ? _swap.fromAmount
            : 0;
        uint256 initialSendingAssetBalance = LibAsset.getOwnBalance(
            _swap.sendingAssetId
        );
        uint256 initialReceivingAssetBalance = LibAsset.getOwnBalance(
            _swap.receivingAssetId
        );
        if (nativeValue == 0) {
            LibAsset.maxApproveERC20(
                IERC20(_swap.sendingAssetId),
                _swap.approveTo,
                _swap.fromAmount
            );
        }
        if (initialSendingAssetBalance < _swap.fromAmount) {
            revert InsufficientBalance(
                _swap.fromAmount,
                initialSendingAssetBalance
            );
        }
        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory res) = _swap.callTo.call{
            value: nativeValue
        }(_swap.callData);
        if (!success) {
            LibUtil.revertWith(res);
        }
        uint256 newBalance = LibAsset.getOwnBalance(_swap.receivingAssetId);
        emit AssetSwapped(
            transactionId,
            _swap.callTo,
            _swap.sendingAssetId,
            _swap.receivingAssetId,
            _swap.fromAmount,
            newBalance > initialReceivingAssetBalance
                ? newBalance - initialReceivingAssetBalance
                : newBalance,
            block.timestamp
        );
    }
}
// SPDX-License-Identifier: MIT
/// @custom:version 1.0.0
pragma solidity ^0.8.17;
import "./LibBytes.sol";
library LibUtil {
    using LibBytes for bytes;
    function getRevertMsg(
        bytes memory _res
    ) internal pure returns (string memory) {
        // If the _res length is less than 68, then the transaction failed silently (without a revert message)
        if (_res.length < 68) return "Transaction reverted silently";
        bytes memory revertData = _res.slice(4, _res.length - 4); // Remove the selector which is the first 4 bytes
        return abi.decode(revertData, (string)); // All that remains is the revert string
    }
    /// @notice Determines whether the given address is the zero address
    /// @param addr The address to verify
    /// @return Boolean indicating if the address is the zero address
    function isZeroAddress(address addr) internal pure returns (bool) {
        return addr == address(0);
    }
    function revertWith(bytes memory data) internal pure {
        assembly {
            let dataSize := mload(data) // Load the size of the data
            let dataPtr := add(data, 0x20) // Advance data pointer to the next word
            revert(dataPtr, dataSize) // Revert with the given data
        }
    }
}
// SPDX-License-Identifier: UNLICENSED
/// @custom:version 1.0.0
pragma solidity ^0.8.17;
/// @title Reentrancy Guard
/// @author LI.FI (https://li.fi)
/// @notice Abstract contract to provide protection against reentrancy
abstract contract ReentrancyGuard {
    /// Storage ///
    bytes32 private constant NAMESPACE = keccak256("com.lifi.reentrancyguard");
    /// Types ///
    struct ReentrancyStorage {
        uint256 status;
    }
    /// Errors ///
    error ReentrancyError();
    /// Constants ///
    uint256 private constant _NOT_ENTERED = 0;
    uint256 private constant _ENTERED = 1;
    /// Modifiers ///
    modifier nonReentrant() {
        ReentrancyStorage storage s = reentrancyStorage();
        if (s.status == _ENTERED) revert ReentrancyError();
        s.status = _ENTERED;
        _;
        s.status = _NOT_ENTERED;
    }
    /// Private Methods ///
    /// @dev fetch local storage
    function reentrancyStorage()
        private
        pure
        returns (ReentrancyStorage storage data)
    {
        bytes32 position = NAMESPACE;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            data.slot := position
        }
    }
}
// SPDX-License-Identifier: MIT
/// @custom:version 1.0.0
pragma solidity ^0.8.17;
import { ILiFi } from "../Interfaces/ILiFi.sol";
import { LibSwap } from "../Libraries/LibSwap.sol";
import { LibAsset } from "../Libraries/LibAsset.sol";
import { LibAllowList } from "../Libraries/LibAllowList.sol";
import { ContractCallNotAllowed, NoSwapDataProvided, CumulativeSlippageTooHigh } from "../Errors/GenericErrors.sol";
/// @title Swapper
/// @author LI.FI (https://li.fi)
/// @notice Abstract contract to provide swap functionality
contract SwapperV2 is ILiFi {
    /// Types ///
    /// @dev only used to get around "Stack Too Deep" errors
    struct ReserveData {
        bytes32 transactionId;
        address payable leftoverReceiver;
        uint256 nativeReserve;
    }
    /// Modifiers ///
    /// @dev Sends any leftover balances back to the user
    /// @notice Sends any leftover balances to the user
    /// @param _swaps Swap data array
    /// @param _leftoverReceiver Address to send leftover tokens to
    /// @param _initialBalances Array of initial token balances
    modifier noLeftovers(
        LibSwap.SwapData[] calldata _swaps,
        address payable _leftoverReceiver,
        uint256[] memory _initialBalances
    ) {
        uint256 numSwaps = _swaps.length;
        if (numSwaps != 1) {
            address finalAsset = _swaps[numSwaps - 1].receivingAssetId;
            uint256 curBalance;
            _;
            for (uint256 i = 0; i < numSwaps - 1; ) {
                address curAsset = _swaps[i].receivingAssetId;
                // Handle multi-to-one swaps
                if (curAsset != finalAsset) {
                    curBalance =
                        LibAsset.getOwnBalance(curAsset) -
                        _initialBalances[i];
                    if (curBalance > 0) {
                        LibAsset.transferAsset(
                            curAsset,
                            _leftoverReceiver,
                            curBalance
                        );
                    }
                }
                unchecked {
                    ++i;
                }
            }
        } else {
            _;
        }
    }
    /// @dev Sends any leftover balances back to the user reserving native tokens
    /// @notice Sends any leftover balances to the user
    /// @param _swaps Swap data array
    /// @param _leftoverReceiver Address to send leftover tokens to
    /// @param _initialBalances Array of initial token balances
    modifier noLeftoversReserve(
        LibSwap.SwapData[] calldata _swaps,
        address payable _leftoverReceiver,
        uint256[] memory _initialBalances,
        uint256 _nativeReserve
    ) {
        uint256 numSwaps = _swaps.length;
        if (numSwaps != 1) {
            address finalAsset = _swaps[numSwaps - 1].receivingAssetId;
            uint256 curBalance;
            _;
            for (uint256 i = 0; i < numSwaps - 1; ) {
                address curAsset = _swaps[i].receivingAssetId;
                // Handle multi-to-one swaps
                if (curAsset != finalAsset) {
                    curBalance =
                        LibAsset.getOwnBalance(curAsset) -
                        _initialBalances[i];
                    uint256 reserve = LibAsset.isNativeAsset(curAsset)
                        ? _nativeReserve
                        : 0;
                    if (curBalance > 0) {
                        LibAsset.transferAsset(
                            curAsset,
                            _leftoverReceiver,
                            curBalance - reserve
                        );
                    }
                }
                unchecked {
                    ++i;
                }
            }
        } else {
            _;
        }
    }
    /// @dev Refunds any excess native asset sent to the contract after the main function
    /// @notice Refunds any excess native asset sent to the contract after the main function
    /// @param _refundReceiver Address to send refunds to
    modifier refundExcessNative(address payable _refundReceiver) {
        uint256 initialBalance = address(this).balance - msg.value;
        _;
        uint256 finalBalance = address(this).balance;
        if (finalBalance > initialBalance) {
            LibAsset.transferAsset(
                LibAsset.NATIVE_ASSETID,
                _refundReceiver,
                finalBalance - initialBalance
            );
        }
    }
    /// Internal Methods ///
    /// @dev Deposits value, executes swaps, and performs minimum amount check
    /// @param _transactionId the transaction id associated with the operation
    /// @param _minAmount the minimum amount of the final asset to receive
    /// @param _swaps Array of data used to execute swaps
    /// @param _leftoverReceiver The address to send leftover funds to
    /// @return uint256 result of the swap
    function _depositAndSwap(
        bytes32 _transactionId,
        uint256 _minAmount,
        LibSwap.SwapData[] calldata _swaps,
        address payable _leftoverReceiver
    ) internal returns (uint256) {
        uint256 numSwaps = _swaps.length;
        if (numSwaps == 0) {
            revert NoSwapDataProvided();
        }
        address finalTokenId = _swaps[numSwaps - 1].receivingAssetId;
        uint256 initialBalance = LibAsset.getOwnBalance(finalTokenId);
        if (LibAsset.isNativeAsset(finalTokenId)) {
            initialBalance -= msg.value;
        }
        uint256[] memory initialBalances = _fetchBalances(_swaps);
        LibAsset.depositAssets(_swaps);
        _executeSwaps(
            _transactionId,
            _swaps,
            _leftoverReceiver,
            initialBalances
        );
        uint256 newBalance = LibAsset.getOwnBalance(finalTokenId) -
            initialBalance;
        if (newBalance < _minAmount) {
            revert CumulativeSlippageTooHigh(_minAmount, newBalance);
        }
        return newBalance;
    }
    /// @dev Deposits value, executes swaps, and performs minimum amount check and reserves native token for fees
    /// @param _transactionId the transaction id associated with the operation
    /// @param _minAmount the minimum amount of the final asset to receive
    /// @param _swaps Array of data used to execute swaps
    /// @param _leftoverReceiver The address to send leftover funds to
    /// @param _nativeReserve Amount of native token to prevent from being swept back to the caller
    function _depositAndSwap(
        bytes32 _transactionId,
        uint256 _minAmount,
        LibSwap.SwapData[] calldata _swaps,
        address payable _leftoverReceiver,
        uint256 _nativeReserve
    ) internal returns (uint256) {
        uint256 numSwaps = _swaps.length;
        if (numSwaps == 0) {
            revert NoSwapDataProvided();
        }
        address finalTokenId = _swaps[numSwaps - 1].receivingAssetId;
        uint256 initialBalance = LibAsset.getOwnBalance(finalTokenId);
        if (LibAsset.isNativeAsset(finalTokenId)) {
            initialBalance -= msg.value;
        }
        uint256[] memory initialBalances = _fetchBalances(_swaps);
        LibAsset.depositAssets(_swaps);
        ReserveData memory rd = ReserveData(
            _transactionId,
            _leftoverReceiver,
            _nativeReserve
        );
        _executeSwaps(rd, _swaps, initialBalances);
        uint256 newBalance = LibAsset.getOwnBalance(finalTokenId) -
            initialBalance;
        if (LibAsset.isNativeAsset(finalTokenId)) {
            newBalance -= _nativeReserve;
        }
        if (newBalance < _minAmount) {
            revert CumulativeSlippageTooHigh(_minAmount, newBalance);
        }
        return newBalance;
    }
    /// Private Methods ///
    /// @dev Executes swaps and checks that DEXs used are in the allowList
    /// @param _transactionId the transaction id associated with the operation
    /// @param _swaps Array of data used to execute swaps
    /// @param _leftoverReceiver Address to send leftover tokens to
    /// @param _initialBalances Array of initial balances
    function _executeSwaps(
        bytes32 _transactionId,
        LibSwap.SwapData[] calldata _swaps,
        address payable _leftoverReceiver,
        uint256[] memory _initialBalances
    ) internal noLeftovers(_swaps, _leftoverReceiver, _initialBalances) {
        uint256 numSwaps = _swaps.length;
        for (uint256 i = 0; i < numSwaps; ) {
            LibSwap.SwapData calldata currentSwap = _swaps[i];
            if (
                !((LibAsset.isNativeAsset(currentSwap.sendingAssetId) ||
                    LibAllowList.contractIsAllowed(currentSwap.approveTo)) &&
                    LibAllowList.contractIsAllowed(currentSwap.callTo) &&
                    LibAllowList.selectorIsAllowed(
                        bytes4(currentSwap.callData[:4])
                    ))
            ) revert ContractCallNotAllowed();
            LibSwap.swap(_transactionId, currentSwap);
            unchecked {
                ++i;
            }
        }
    }
    /// @dev Executes swaps and checks that DEXs used are in the allowList
    /// @param _reserveData Data passed used to reserve native tokens
    /// @param _swaps Array of data used to execute swaps
    function _executeSwaps(
        ReserveData memory _reserveData,
        LibSwap.SwapData[] calldata _swaps,
        uint256[] memory _initialBalances
    )
        internal
        noLeftoversReserve(
            _swaps,
            _reserveData.leftoverReceiver,
            _initialBalances,
            _reserveData.nativeReserve
        )
    {
        uint256 numSwaps = _swaps.length;
        for (uint256 i = 0; i < numSwaps; ) {
            LibSwap.SwapData calldata currentSwap = _swaps[i];
            if (
                !((LibAsset.isNativeAsset(currentSwap.sendingAssetId) ||
                    LibAllowList.contractIsAllowed(currentSwap.approveTo)) &&
                    LibAllowList.contractIsAllowed(currentSwap.callTo) &&
                    LibAllowList.selectorIsAllowed(
                        bytes4(currentSwap.callData[:4])
                    ))
            ) revert ContractCallNotAllowed();
            LibSwap.swap(_reserveData.transactionId, currentSwap);
            unchecked {
                ++i;
            }
        }
    }
    /// @dev Fetches balances of tokens to be swapped before swapping.
    /// @param _swaps Array of data used to execute swaps
    /// @return uint256[] Array of token balances.
    function _fetchBalances(
        LibSwap.SwapData[] calldata _swaps
    ) private view returns (uint256[] memory) {
        uint256 numSwaps = _swaps.length;
        uint256[] memory balances = new uint256[](numSwaps);
        address asset;
        for (uint256 i = 0; i < numSwaps; ) {
            asset = _swaps[i].receivingAssetId;
            balances[i] = LibAsset.getOwnBalance(asset);
            if (LibAsset.isNativeAsset(asset)) {
                balances[i] -= msg.value;
            }
            unchecked {
                ++i;
            }
        }
        return balances;
    }
}
// SPDX-License-Identifier: UNLICENSED
/// @custom:version 1.0.0
pragma solidity ^0.8.17;
import { LibAsset } from "../Libraries/LibAsset.sol";
import { LibUtil } from "../Libraries/LibUtil.sol";
import { InvalidReceiver, InformationMismatch, InvalidSendingToken, InvalidAmount, NativeAssetNotSupported, InvalidDestinationChain, CannotBridgeToSameNetwork } from "../Errors/GenericErrors.sol";
import { ILiFi } from "../Interfaces/ILiFi.sol";
import { LibSwap } from "../Libraries/LibSwap.sol";
contract Validatable {
    modifier validateBridgeData(ILiFi.BridgeData memory _bridgeData) {
        if (LibUtil.isZeroAddress(_bridgeData.receiver)) {
            revert InvalidReceiver();
        }
        if (_bridgeData.minAmount == 0) {
            revert InvalidAmount();
        }
        if (_bridgeData.destinationChainId == block.chainid) {
            revert CannotBridgeToSameNetwork();
        }
        _;
    }
    modifier noNativeAsset(ILiFi.BridgeData memory _bridgeData) {
        if (LibAsset.isNativeAsset(_bridgeData.sendingAssetId)) {
            revert NativeAssetNotSupported();
        }
        _;
    }
    modifier onlyAllowSourceToken(
        ILiFi.BridgeData memory _bridgeData,
        address _token
    ) {
        if (_bridgeData.sendingAssetId != _token) {
            revert InvalidSendingToken();
        }
        _;
    }
    modifier onlyAllowDestinationChain(
        ILiFi.BridgeData memory _bridgeData,
        uint256 _chainId
    ) {
        if (_bridgeData.destinationChainId != _chainId) {
            revert InvalidDestinationChain();
        }
        _;
    }
    modifier containsSourceSwaps(ILiFi.BridgeData memory _bridgeData) {
        if (!_bridgeData.hasSourceSwaps) {
            revert InformationMismatch();
        }
        _;
    }
    modifier doesNotContainSourceSwaps(ILiFi.BridgeData memory _bridgeData) {
        if (_bridgeData.hasSourceSwaps) {
            revert InformationMismatch();
        }
        _;
    }
    modifier doesNotContainDestinationCalls(
        ILiFi.BridgeData memory _bridgeData
    ) {
        if (_bridgeData.hasDestinationCall) {
            revert InformationMismatch();
        }
        _;
    }
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
/// @notice Gas optimized ECDSA wrapper.
/// @author Solady (https://github.com/vectorized/solady/blob/main/src/utils/ECDSA.sol)
/// @author Modified from Solmate (https://github.com/transmissions11/solmate/blob/main/src/utils/ECDSA.sol)
/// @author Modified from OpenZeppelin (https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/cryptography/ECDSA.sol)
///
/// @dev Note:
/// - The recovery functions use the ecrecover precompile (0x1).
/// - As of Solady version 0.0.68, the `recover` variants will revert upon recovery failure.
///   This is for more safety by default.
///   Use the `tryRecover` variants if you need to get the zero address back
///   upon recovery failure instead.
/// - As of Solady version 0.0.134, all `bytes signature` variants accept both
///   regular 65-byte `(r, s, v)` and EIP-2098 `(r, vs)` short form signatures.
///   See: https://eips.ethereum.org/EIPS/eip-2098
///   This is for calldata efficiency on smart accounts prevalent on L2s.
///
/// WARNING! Do NOT use signatures as unique identifiers:
/// - Use a nonce in the digest to prevent replay attacks on the same contract.
/// - Use EIP-712 for the digest to prevent replay attacks across different chains and contracts.
///   EIP-712 also enables readable signing of typed data for better user safety.
/// This implementation does NOT check if a signature is non-malleable.
library ECDSA {
    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                        CUSTOM ERRORS                       */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/
    /// @dev The signature is invalid.
    error InvalidSignature();
    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                    RECOVERY OPERATIONS                     */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/
    /// @dev Recovers the signer's address from a message digest `hash`, and the `signature`.
    function recover(bytes32 hash, bytes memory signature) internal view returns (address result) {
        /// @solidity memory-safe-assembly
        assembly {
            result := 1
            let m := mload(0x40) // Cache the free memory pointer.
            for {} 1 {} {
                mstore(0x00, hash)
                mstore(0x40, mload(add(signature, 0x20))) // `r`.
                if eq(mload(signature), 64) {
                    let vs := mload(add(signature, 0x40))
                    mstore(0x20, add(shr(255, vs), 27)) // `v`.
                    mstore(0x60, shr(1, shl(1, vs))) // `s`.
                    break
                }
                if eq(mload(signature), 65) {
                    mstore(0x20, byte(0, mload(add(signature, 0x60)))) // `v`.
                    mstore(0x60, mload(add(signature, 0x40))) // `s`.
                    break
                }
                result := 0
                break
            }
            result :=
                mload(
                    staticcall(
                        gas(), // Amount of gas left for the transaction.
                        result, // Address of `ecrecover`.
                        0x00, // Start of input.
                        0x80, // Size of input.
                        0x01, // Start of output.
                        0x20 // Size of output.
                    )
                )
            // `returndatasize()` will be `0x20` upon success, and `0x00` otherwise.
            if iszero(returndatasize()) {
                mstore(0x00, 0x8baa579f) // `InvalidSignature()`.
                revert(0x1c, 0x04)
            }
            mstore(0x60, 0) // Restore the zero slot.
            mstore(0x40, m) // Restore the free memory pointer.
        }
    }
    /// @dev Recovers the signer's address from a message digest `hash`, and the `signature`.
    function recoverCalldata(bytes32 hash, bytes calldata signature)
        internal
        view
        returns (address result)
    {
        /// @solidity memory-safe-assembly
        assembly {
            result := 1
            let m := mload(0x40) // Cache the free memory pointer.
            mstore(0x00, hash)
            for {} 1 {} {
                if eq(signature.length, 64) {
                    let vs := calldataload(add(signature.offset, 0x20))
                    mstore(0x20, add(shr(255, vs), 27)) // `v`.
                    mstore(0x40, calldataload(signature.offset)) // `r`.
                    mstore(0x60, shr(1, shl(1, vs))) // `s`.
                    break
                }
                if eq(signature.length, 65) {
                    mstore(0x20, byte(0, calldataload(add(signature.offset, 0x40)))) // `v`.
                    calldatacopy(0x40, signature.offset, 0x40) // Copy `r` and `s`.
                    break
                }
                result := 0
                break
            }
            result :=
                mload(
                    staticcall(
                        gas(), // Amount of gas left for the transaction.
                        result, // Address of `ecrecover`.
                        0x00, // Start of input.
                        0x80, // Size of input.
                        0x01, // Start of output.
                        0x20 // Size of output.
                    )
                )
            // `returndatasize()` will be `0x20` upon success, and `0x00` otherwise.
            if iszero(returndatasize()) {
                mstore(0x00, 0x8baa579f) // `InvalidSignature()`.
                revert(0x1c, 0x04)
            }
            mstore(0x60, 0) // Restore the zero slot.
            mstore(0x40, m) // Restore the free memory pointer.
        }
    }
    /// @dev Recovers the signer's address from a message digest `hash`,
    /// and the EIP-2098 short form signature defined by `r` and `vs`.
    function recover(bytes32 hash, bytes32 r, bytes32 vs) internal view returns (address result) {
        /// @solidity memory-safe-assembly
        assembly {
            let m := mload(0x40) // Cache the free memory pointer.
            mstore(0x00, hash)
            mstore(0x20, add(shr(255, vs), 27)) // `v`.
            mstore(0x40, r)
            mstore(0x60, shr(1, shl(1, vs))) // `s`.
            result :=
                mload(
                    staticcall(
                        gas(), // Amount of gas left for the transaction.
                        1, // Address of `ecrecover`.
                        0x00, // Start of input.
                        0x80, // Size of input.
                        0x01, // Start of output.
                        0x20 // Size of output.
                    )
                )
            // `returndatasize()` will be `0x20` upon success, and `0x00` otherwise.
            if iszero(returndatasize()) {
                mstore(0x00, 0x8baa579f) // `InvalidSignature()`.
                revert(0x1c, 0x04)
            }
            mstore(0x60, 0) // Restore the zero slot.
            mstore(0x40, m) // Restore the free memory pointer.
        }
    }
    /// @dev Recovers the signer's address from a message digest `hash`,
    /// and the signature defined by `v`, `r`, `s`.
    function recover(bytes32 hash, uint8 v, bytes32 r, bytes32 s)
        internal
        view
        returns (address result)
    {
        /// @solidity memory-safe-assembly
        assembly {
            let m := mload(0x40) // Cache the free memory pointer.
            mstore(0x00, hash)
            mstore(0x20, and(v, 0xff))
            mstore(0x40, r)
            mstore(0x60, s)
            result :=
                mload(
                    staticcall(
                        gas(), // Amount of gas left for the transaction.
                        1, // Address of `ecrecover`.
                        0x00, // Start of input.
                        0x80, // Size of input.
                        0x01, // Start of output.
                        0x20 // Size of output.
                    )
                )
            // `returndatasize()` will be `0x20` upon success, and `0x00` otherwise.
            if iszero(returndatasize()) {
                mstore(0x00, 0x8baa579f) // `InvalidSignature()`.
                revert(0x1c, 0x04)
            }
            mstore(0x60, 0) // Restore the zero slot.
            mstore(0x40, m) // Restore the free memory pointer.
        }
    }
    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                   TRY-RECOVER OPERATIONS                   */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/
    // WARNING!
    // These functions will NOT revert upon recovery failure.
    // Instead, they will return the zero address upon recovery failure.
    // It is critical that the returned address is NEVER compared against
    // a zero address (e.g. an uninitialized address variable).
    /// @dev Recovers the signer's address from a message digest `hash`, and the `signature`.
    function tryRecover(bytes32 hash, bytes memory signature)
        internal
        view
        returns (address result)
    {
        /// @solidity memory-safe-assembly
        assembly {
            result := 1
            let m := mload(0x40) // Cache the free memory pointer.
            for {} 1 {} {
                mstore(0x00, hash)
                mstore(0x40, mload(add(signature, 0x20))) // `r`.
                if eq(mload(signature), 64) {
                    let vs := mload(add(signature, 0x40))
                    mstore(0x20, add(shr(255, vs), 27)) // `v`.
                    mstore(0x60, shr(1, shl(1, vs))) // `s`.
                    break
                }
                if eq(mload(signature), 65) {
                    mstore(0x20, byte(0, mload(add(signature, 0x60)))) // `v`.
                    mstore(0x60, mload(add(signature, 0x40))) // `s`.
                    break
                }
                result := 0
                break
            }
            pop(
                staticcall(
                    gas(), // Amount of gas left for the transaction.
                    result, // Address of `ecrecover`.
                    0x00, // Start of input.
                    0x80, // Size of input.
                    0x40, // Start of output.
                    0x20 // Size of output.
                )
            )
            mstore(0x60, 0) // Restore the zero slot.
            // `returndatasize()` will be `0x20` upon success, and `0x00` otherwise.
            result := mload(xor(0x60, returndatasize()))
            mstore(0x40, m) // Restore the free memory pointer.
        }
    }
    /// @dev Recovers the signer's address from a message digest `hash`, and the `signature`.
    function tryRecoverCalldata(bytes32 hash, bytes calldata signature)
        internal
        view
        returns (address result)
    {
        /// @solidity memory-safe-assembly
        assembly {
            result := 1
            let m := mload(0x40) // Cache the free memory pointer.
            mstore(0x00, hash)
            for {} 1 {} {
                if eq(signature.length, 64) {
                    let vs := calldataload(add(signature.offset, 0x20))
                    mstore(0x20, add(shr(255, vs), 27)) // `v`.
                    mstore(0x40, calldataload(signature.offset)) // `r`.
                    mstore(0x60, shr(1, shl(1, vs))) // `s`.
                    break
                }
                if eq(signature.length, 65) {
                    mstore(0x20, byte(0, calldataload(add(signature.offset, 0x40)))) // `v`.
                    calldatacopy(0x40, signature.offset, 0x40) // Copy `r` and `s`.
                    break
                }
                result := 0
                break
            }
            pop(
                staticcall(
                    gas(), // Amount of gas left for the transaction.
                    result, // Address of `ecrecover`.
                    0x00, // Start of input.
                    0x80, // Size of input.
                    0x40, // Start of output.
                    0x20 // Size of output.
                )
            )
            mstore(0x60, 0) // Restore the zero slot.
            // `returndatasize()` will be `0x20` upon success, and `0x00` otherwise.
            result := mload(xor(0x60, returndatasize()))
            mstore(0x40, m) // Restore the free memory pointer.
        }
    }
    /// @dev Recovers the signer's address from a message digest `hash`,
    /// and the EIP-2098 short form signature defined by `r` and `vs`.
    function tryRecover(bytes32 hash, bytes32 r, bytes32 vs)
        internal
        view
        returns (address result)
    {
        /// @solidity memory-safe-assembly
        assembly {
            let m := mload(0x40) // Cache the free memory pointer.
            mstore(0x00, hash)
            mstore(0x20, add(shr(255, vs), 27)) // `v`.
            mstore(0x40, r)
            mstore(0x60, shr(1, shl(1, vs))) // `s`.
            pop(
                staticcall(
                    gas(), // Amount of gas left for the transaction.
                    1, // Address of `ecrecover`.
                    0x00, // Start of input.
                    0x80, // Size of input.
                    0x40, // Start of output.
                    0x20 // Size of output.
                )
            )
            mstore(0x60, 0) // Restore the zero slot.
            // `returndatasize()` will be `0x20` upon success, and `0x00` otherwise.
            result := mload(xor(0x60, returndatasize()))
            mstore(0x40, m) // Restore the free memory pointer.
        }
    }
    /// @dev Recovers the signer's address from a message digest `hash`,
    /// and the signature defined by `v`, `r`, `s`.
    function tryRecover(bytes32 hash, uint8 v, bytes32 r, bytes32 s)
        internal
        view
        returns (address result)
    {
        /// @solidity memory-safe-assembly
        assembly {
            let m := mload(0x40) // Cache the free memory pointer.
            mstore(0x00, hash)
            mstore(0x20, and(v, 0xff))
            mstore(0x40, r)
            mstore(0x60, s)
            pop(
                staticcall(
                    gas(), // Amount of gas left for the transaction.
                    1, // Address of `ecrecover`.
                    0x00, // Start of input.
                    0x80, // Size of input.
                    0x40, // Start of output.
                    0x20 // Size of output.
                )
            )
            mstore(0x60, 0) // Restore the zero slot.
            // `returndatasize()` will be `0x20` upon success, and `0x00` otherwise.
            result := mload(xor(0x60, returndatasize()))
            mstore(0x40, m) // Restore the free memory pointer.
        }
    }
    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                     HASHING OPERATIONS                     */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/
    /// @dev Returns an Ethereum Signed Message, created from a `hash`.
    /// This produces a hash corresponding to the one signed with the
    /// [`eth_sign`](https://eth.wiki/json-rpc/API#eth_sign)
    /// JSON-RPC method as part of EIP-191.
    function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32 result) {
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x20, hash) // Store into scratch space for keccak256.
            mstore(0x00, "\\x00\\x00\\x00\\x00\\x19Ethereum Signed Message:\
32") // 28 bytes.
            result := keccak256(0x04, 0x3c) // `32 * 2 - (32 - 28) = 60 = 0x3c`.
        }
    }
    /// @dev Returns an Ethereum Signed Message, created from `s`.
    /// This produces a hash corresponding to the one signed with the
    /// [`eth_sign`](https://eth.wiki/json-rpc/API#eth_sign)
    /// JSON-RPC method as part of EIP-191.
    /// Note: Supports lengths of `s` up to 999999 bytes.
    function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32 result) {
        /// @solidity memory-safe-assembly
        assembly {
            let sLength := mload(s)
            let o := 0x20
            mstore(o, "\\x19Ethereum Signed Message:\
") // 26 bytes, zero-right-padded.
            mstore(0x00, 0x00)
            // Convert the `s.length` to ASCII decimal representation: `base10(s.length)`.
            for { let temp := sLength } 1 {} {
                o := sub(o, 1)
                mstore8(o, add(48, mod(temp, 10)))
                temp := div(temp, 10)
                if iszero(temp) { break }
            }
            let n := sub(0x3a, o) // Header length: `26 + 32 - o`.
            // Throw an out-of-offset error (consumes all gas) if the header exceeds 32 bytes.
            returndatacopy(returndatasize(), returndatasize(), gt(n, 0x20))
            mstore(s, or(mload(0x00), mload(n))) // Temporarily store the header.
            result := keccak256(add(s, sub(0x20, n)), add(n, sLength))
            mstore(s, sLength) // Restore the length.
        }
    }
    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                   EMPTY CALLDATA HELPERS                   */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/
    /// @dev Returns an empty calldata bytes.
    function emptySignature() internal pure returns (bytes calldata signature) {
        /// @solidity memory-safe-assembly
        assembly {
            signature.length := 0
        }
    }
}
// SPDX-License-Identifier: MIT
/// @custom:version 1.0.0
pragma solidity ^0.8.17;
error AlreadyInitialized();
error CannotAuthoriseSelf();
error CannotBridgeToSameNetwork();
error ContractCallNotAllowed();
error CumulativeSlippageTooHigh(uint256 minAmount, uint256 receivedAmount);
error DiamondIsPaused();
error ExternalCallFailed();
error FunctionDoesNotExist();
error InformationMismatch();
error InsufficientBalance(uint256 required, uint256 balance);
error InvalidAmount();
error InvalidCallData();
error InvalidConfig();
error InvalidContract();
error InvalidDestinationChain();
error InvalidFallbackAddress();
error InvalidReceiver();
error InvalidSendingToken();
error NativeAssetNotSupported();
error NativeAssetTransferFailed();
error NoSwapDataProvided();
error NoSwapFromZeroBalance();
error NotAContract();
error NotInitialized();
error NoTransferToNullAddress();
error NullAddrIsNotAnERC20Token();
error NullAddrIsNotAValidSpender();
error OnlyContractOwner();
error RecoveryAddressCannotBeZero();
error ReentrancyError();
error TokenNotSupported();
error UnAuthorized();
error UnsupportedChainId(uint256 chainId);
error WithdrawFailed();
error ZeroAmount();
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/utils/SafeERC20.sol)
pragma solidity ^0.8.0;
import "../IERC20.sol";
import "../extensions/IERC20Permit.sol";
import "../../../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 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.encodeWithSelector(token.transfer.selector, 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.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }
    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(IERC20 token, address spender, uint256 value) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 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);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value));
    }
    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value));
        }
    }
    /**
     * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful. Compatible with tokens that require the approval to be set to
     * 0 before setting it to a non-zero value.
     */
    function forceApprove(IERC20 token, address spender, uint256 value) internal {
        bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value);
        if (!_callOptionalReturnBool(token, approvalCall)) {
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0));
            _callOptionalReturn(token, approvalCall);
        }
    }
    /**
     * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`.
     * Revert on invalid signature.
     */
    function safePermit(
        IERC20Permit token,
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal {
        uint256 nonceBefore = token.nonces(owner);
        token.permit(owner, spender, value, deadline, v, r, s);
        uint256 nonceAfter = token.nonces(owner);
        require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
    }
    /**
     * @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, "SafeERC20: low-level call failed");
        require(returndata.length == 0 || abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
    }
    /**
     * @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.isContract(address(token));
    }
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
 * @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 amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);
    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);
    /**
     * @dev Moves `amount` 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 amount) 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 `amount` 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 amount) external returns (bool);
    /**
     * @dev Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` 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 amount) external returns (bool);
}
// SPDX-License-Identifier: MIT
/// @custom:version 1.0.0
pragma solidity ^0.8.17;
library LibBytes {
    // solhint-disable no-inline-assembly
    // LibBytes specific errors
    error SliceOverflow();
    error SliceOutOfBounds();
    error AddressOutOfBounds();
    bytes16 private constant _SYMBOLS = "0123456789abcdef";
    // -------------------------
    function slice(
        bytes memory _bytes,
        uint256 _start,
        uint256 _length
    ) internal pure returns (bytes memory) {
        if (_length + 31 < _length) revert SliceOverflow();
        if (_bytes.length < _start + _length) revert SliceOutOfBounds();
        bytes memory tempBytes;
        assembly {
            switch iszero(_length)
            case 0 {
                // Get a location of some free memory and store it in tempBytes as
                // Solidity does for memory variables.
                tempBytes := mload(0x40)
                // The first word of the slice result is potentially a partial
                // word read from the original array. To read it, we calculate
                // the length of that partial word and start copying that many
                // bytes into the array. The first word we copy will start with
                // data we don't care about, but the last `lengthmod` bytes will
                // land at the beginning of the contents of the new array. When
                // we're done copying, we overwrite the full first word with
                // the actual length of the slice.
                let lengthmod := and(_length, 31)
                // The multiplication in the next line is necessary
                // because when slicing multiples of 32 bytes (lengthmod == 0)
                // the following copy loop was copying the origin's length
                // and then ending prematurely not copying everything it should.
                let mc := add(
                    add(tempBytes, lengthmod),
                    mul(0x20, iszero(lengthmod))
                )
                let end := add(mc, _length)
                for {
                    // The multiplication in the next line has the same exact purpose
                    // as the one above.
                    let cc := add(
                        add(
                            add(_bytes, lengthmod),
                            mul(0x20, iszero(lengthmod))
                        ),
                        _start
                    )
                } lt(mc, end) {
                    mc := add(mc, 0x20)
                    cc := add(cc, 0x20)
                } {
                    mstore(mc, mload(cc))
                }
                mstore(tempBytes, _length)
                //update free-memory pointer
                //allocating the array padded to 32 bytes like the compiler does now
                mstore(0x40, and(add(mc, 31), not(31)))
            }
            //if we want a zero-length slice let's just return a zero-length array
            default {
                tempBytes := mload(0x40)
                //zero out the 32 bytes slice we are about to return
                //we need to do it because Solidity does not garbage collect
                mstore(tempBytes, 0)
                mstore(0x40, add(tempBytes, 0x20))
            }
        }
        return tempBytes;
    }
    function toAddress(
        bytes memory _bytes,
        uint256 _start
    ) internal pure returns (address) {
        if (_bytes.length < _start + 20) {
            revert AddressOutOfBounds();
        }
        address tempAddress;
        assembly {
            tempAddress := div(
                mload(add(add(_bytes, 0x20), _start)),
                0x1000000000000000000000000
            )
        }
        return tempAddress;
    }
    /// Copied from OpenZeppelin's `Strings.sol` utility library.
    /// https://github.com/OpenZeppelin/openzeppelin-contracts/blob/8335676b0e99944eef6a742e16dcd9ff6e68e609/contracts/utils/Strings.sol
    function toHexString(
        uint256 value,
        uint256 length
    ) internal pure returns (string memory) {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = _SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }
}
// SPDX-License-Identifier: MIT
/// @custom:version 1.0.0
pragma solidity ^0.8.17;
import { InvalidContract } from "../Errors/GenericErrors.sol";
/// @title Lib Allow List
/// @author LI.FI (https://li.fi)
/// @notice Library for managing and accessing the conract address allow list
library LibAllowList {
    /// Storage ///
    bytes32 internal constant NAMESPACE =
        keccak256("com.lifi.library.allow.list");
    struct AllowListStorage {
        mapping(address => bool) allowlist;
        mapping(bytes4 => bool) selectorAllowList;
        address[] contracts;
    }
    /// @dev Adds a contract address to the allow list
    /// @param _contract the contract address to add
    function addAllowedContract(address _contract) internal {
        _checkAddress(_contract);
        AllowListStorage storage als = _getStorage();
        if (als.allowlist[_contract]) return;
        als.allowlist[_contract] = true;
        als.contracts.push(_contract);
    }
    /// @dev Checks whether a contract address has been added to the allow list
    /// @param _contract the contract address to check
    function contractIsAllowed(
        address _contract
    ) internal view returns (bool) {
        return _getStorage().allowlist[_contract];
    }
    /// @dev Remove a contract address from the allow list
    /// @param _contract the contract address to remove
    function removeAllowedContract(address _contract) internal {
        AllowListStorage storage als = _getStorage();
        if (!als.allowlist[_contract]) {
            return;
        }
        als.allowlist[_contract] = false;
        uint256 length = als.contracts.length;
        // Find the contract in the list
        for (uint256 i = 0; i < length; i++) {
            if (als.contracts[i] == _contract) {
                // Move the last element into the place to delete
                als.contracts[i] = als.contracts[length - 1];
                // Remove the last element
                als.contracts.pop();
                break;
            }
        }
    }
    /// @dev Fetch contract addresses from the allow list
    function getAllowedContracts() internal view returns (address[] memory) {
        return _getStorage().contracts;
    }
    /// @dev Add a selector to the allow list
    /// @param _selector the selector to add
    function addAllowedSelector(bytes4 _selector) internal {
        _getStorage().selectorAllowList[_selector] = true;
    }
    /// @dev Removes a selector from the allow list
    /// @param _selector the selector to remove
    function removeAllowedSelector(bytes4 _selector) internal {
        _getStorage().selectorAllowList[_selector] = false;
    }
    /// @dev Returns if selector has been added to the allow list
    /// @param _selector the selector to check
    function selectorIsAllowed(bytes4 _selector) internal view returns (bool) {
        return _getStorage().selectorAllowList[_selector];
    }
    /// @dev Fetch local storage struct
    function _getStorage()
        internal
        pure
        returns (AllowListStorage storage als)
    {
        bytes32 position = NAMESPACE;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            als.slot := position
        }
    }
    /// @dev Contains business logic for validating a contract address.
    /// @param _contract address of the dex to check
    function _checkAddress(address _contract) private view {
        if (_contract == address(0)) revert InvalidContract();
        if (_contract.code.length == 0) revert InvalidContract();
    }
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/extensions/IERC20Permit.sol)
pragma solidity ^0.8.0;
/**
 * @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.
 */
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].
     */
    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 v4.9.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     *
     * Furthermore, `isContract` will also return true if the target contract within
     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
     * which only has an effect at the end of a transaction.
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.
        return account.code.length > 0;
    }
    /**
     * @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/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");
        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }
    /**
     * @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, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * 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.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }
    /**
     * @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`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }
    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }
    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }
    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }
    function _revert(bytes memory returndata, string memory errorMessage) 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(errorMessage);
        }
    }
}