Contract Source Code (Solidity Standard Json-Input format)

IDE

• Blockscan IDE
• 🤖 Code ReaderBeta

More Options

• Similar
• Submit Audit
• Compare

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.30;

import { IERC721Receiver } from "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol";
import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import { SafeTransferLib } from "solady/src/utils/SafeTransferLib.sol";
import { IERC1271 } from "@openzeppelin/contracts/interfaces/IERC1271.sol";
import { IERC165 } from "@openzeppelin/contracts/utils/introspection/IERC165.sol";
import { ECDSA } from "solady/src/utils/ECDSA.sol";

/**
 * @title NFTReceiver
 * @notice Basic contract to receive NFTs and manage funds
 * @dev Owner can withdraw native and ERC20 tokens and sign on behalf of the contract
 */
contract NFTReceiver is IERC721Receiver, IERC1271, IERC165 {
    /// @notice EIP-1271 magic value for valid signatures
    bytes4 private constant MAGIC_VALUE = 0x1626ba7e;

    /// @notice Primary contract owner (immutable, set at deployment)
    address public immutable owner;

    /// @notice WETH contract address for balance tracking
    address public immutable weth;

    /// @notice Additional owners who can sign on behalf of the contract
    address[] private _additionalOwners;

    /// @notice Flag to always return valid signature (for testing/special cases)
    bool private _alwaysValidSignature;

    // ============================================
    // EVENTS
    // ============================================

    /// @notice Emitted when an NFT is received
    event NFTReceived(
        address indexed operator,
        address indexed from,
        uint256 indexed tokenId,
        address collection,
        bytes data
    );

    /// @notice Emitted with WETH balance when NFT is received
    event WETHBalance(uint256 balance);

    /// @notice Emitted when native funds are withdrawn
    event NativeWithdrawn(address indexed to, uint256 amount);

    /// @notice Emitted when ERC20 tokens are withdrawn
    event ERC20Withdrawn(address indexed token, address indexed to, uint256 amount);

    /// @notice Emitted when ERC20 approval is granted
    event ERC20Approved(address indexed token, address indexed spender, uint256 amount);

    /// @notice Emitted when an additional owner is added
    event OwnerAdded(address indexed newOwner);

    /// @notice Emitted when an additional owner is removed
    event OwnerRemoved(address indexed removedOwner);

    /// @notice Emitted when the always valid signature flag is changed
    event AlwaysValidSignatureChanged(bool enabled);

    // ============================================
    // ERRORS
    // ============================================

    /// @notice Thrown when caller is not the owner
    error OnlyOwner();

    /// @notice Thrown when withdrawal fails
    error WithdrawalFailed();

    /// @notice Thrown when trying to add an owner that already exists
    error OwnerAlreadyExists();

    /// @notice Thrown when trying to remove an owner that doesn't exist
    error OwnerNotFound();

    // ============================================
    // MODIFIERS
    // ============================================

    /// @notice Restricts function access to owner only
    modifier onlyOwner() {
        if (msg.sender != owner) revert OnlyOwner();
        _;
    }

    // ============================================
    // CONSTRUCTOR
    // ============================================

    /**
     * @notice Initialize the contract
     * @param weth_ WETH contract address
     */
    constructor(address weth_) {
        owner = msg.sender;
        weth = weth_;
    }

    // ============================================
    // NFT RECEIVING
    // ============================================

    /**
     * @notice Handle receipt of ERC721 NFTs
     * @param operator Address that initiated the transfer
     * @param from Address that previously owned the token
     * @param tokenId The NFT token ID received
     * @param data Additional data with no specified format
     * @return Function selector to confirm receipt
     */
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external override returns (bytes4) {
        // Get current WETH balance
        uint256 wethBalance = IERC20(weth).balanceOf(address(this));

        // Emit events
        emit NFTReceived(operator, from, tokenId, msg.sender, data);
        emit WETHBalance(wethBalance);

        return this.onERC721Received.selector;
    }

    // ============================================
    // OWNER FUNCTIONS - WITHDRAWALS
    // ============================================

    /**
     * @notice Withdraw native currency (ETH) from the contract
     * @param to Address to receive the funds
     * @param amount Amount to withdraw (0 = withdraw all)
     */
    function withdrawNative(address to, uint256 amount) external onlyOwner {
        uint256 balance = address(this).balance;
        uint256 amountToWithdraw = amount == 0 ? balance : amount;

        if (amountToWithdraw > 0) {
            SafeTransferLib.safeTransferETH(to, amountToWithdraw);
            emit NativeWithdrawn(to, amountToWithdraw);
        }
    }

    /**
     * @notice Withdraw ERC20 tokens from the contract
     * @param token Address of the ERC20 token contract
     * @param to Address to receive the tokens
     * @param amount Amount to withdraw (0 = withdraw all)
     */
    function withdrawERC20(address token, address to, uint256 amount) external onlyOwner {
        uint256 balance = IERC20(token).balanceOf(address(this));
        uint256 amountToWithdraw = amount == 0 ? balance : amount;

        if (amountToWithdraw > 0) {
            SafeTransferLib.safeTransfer(token, to, amountToWithdraw);
            emit ERC20Withdrawn(token, to, amountToWithdraw);
        }
    }

    /**
     * @notice Approve ERC20 tokens to a spender contract
     * @param token Address of the ERC20 token contract
     * @param spender Address to approve tokens to
     * @param amount Amount to approve (0 = revoke approval)
     */
    function approveERC20(address token, address spender, uint256 amount) external onlyOwner {
        SafeTransferLib.safeApprove(token, spender, amount);
        emit ERC20Approved(token, spender, amount);
    }

    // ============================================
    // OWNER MANAGEMENT
    // ============================================

    /**
     * @notice Add an additional owner who can sign on behalf of the contract
     * @param newOwner Address to add as an additional owner
     */
    function addOwner(address newOwner) external onlyOwner {
        // Check if already an owner (primary or additional)
        if (newOwner == owner) revert OwnerAlreadyExists();
        
        for (uint256 i = 0; i < _additionalOwners.length; i++) {
            if (_additionalOwners[i] == newOwner) revert OwnerAlreadyExists();
        }
        
        _additionalOwners.push(newOwner);
        emit OwnerAdded(newOwner);
    }

    /**
     * @notice Remove an additional owner
     * @param ownerToRemove Address to remove from additional owners
     */
    function removeOwner(address ownerToRemove) external onlyOwner {
        bool found = false;
        
        for (uint256 i = 0; i < _additionalOwners.length; i++) {
            if (_additionalOwners[i] == ownerToRemove) {
                // Replace with last element and pop
                _additionalOwners[i] = _additionalOwners[_additionalOwners.length - 1];
                _additionalOwners.pop();
                found = true;
                emit OwnerRemoved(ownerToRemove);
                break;
            }
        }
        
        if (!found) revert OwnerNotFound();
    }

    /**
     * @notice Get all additional owners
     * @return Array of additional owner addresses
     */
    function getAdditionalOwners() external view returns (address[] memory) {
        return _additionalOwners;
    }

    /**
     * @notice Check if an address is an owner (primary or additional)
     * @param account Address to check
     * @return true if the address is an owner
     */
    function isOwner(address account) public view returns (bool) {
        if (account == owner) return true;
        
        for (uint256 i = 0; i < _additionalOwners.length; i++) {
            if (_additionalOwners[i] == account) return true;
        }
        
        return false;
    }

    /**
     * @notice Set the always valid signature flag
     * @dev When enabled, all signatures are considered valid (use with caution)
     * @param enabled true to enable always valid signatures, false to disable
     */
    function setAlwaysValidSignature(bool enabled) external onlyOwner {
        _alwaysValidSignature = enabled;
        emit AlwaysValidSignatureChanged(enabled);
    }

    /**
     * @notice Get the current state of the always valid signature flag
     * @return true if always valid signature is enabled
     */
    function alwaysValidSignature() external view returns (bool) {
        return _alwaysValidSignature;
    }

    // ============================================
    // EIP-1271 SIGNATURE VALIDATION
    // ============================================

    /**
     * @notice Validates a signature according to EIP-1271
     * @dev Allows any owner (primary or additional) to sign messages on behalf of this contract
     * @param hash Hash of the data to be signed
     * @param signature Signature byte array associated with the hash
     * @return magicValue bytes4 magic value 0x1626ba7e if the signature is valid
     */
    function isValidSignature(
        bytes32 hash,
        bytes memory signature
    ) external view override returns (bytes4 magicValue) {
        // If always valid signature is enabled, return magic value immediately
        if (_alwaysValidSignature) {
            return MAGIC_VALUE;
        }
        
        // Recover the signer from the signature
        address signer = ECDSA.recover(hash, signature);
        
        // Check if the signer is any of the owners (primary or additional)
        if (isOwner(signer)) {
            return MAGIC_VALUE;
        }
        
        return 0xffffffff;
    }

    // ============================================
    // ERC-165 INTERFACE SUPPORT
    // ============================================

    /**
     * @notice Check if this contract supports a given interface
     * @param interfaceId The interface identifier to check
     * @return true if the interface is supported
     */
    function supportsInterface(bytes4 interfaceId) external pure override returns (bool) {
        return
            interfaceId == type(IERC721Receiver).interfaceId ||
            interfaceId == type(IERC1271).interfaceId ||
            interfaceId == type(IERC165).interfaceId;
    }

    // ============================================
    // RECEIVE FUNCTION
    // ============================================

    /**
     * @notice Receive function to accept direct ETH transfers
     */
    receive() external payable {}
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (interfaces/IERC1271.sol)

pragma solidity >=0.5.0;

/**
 * @dev Interface of the ERC-1271 standard signature validation method for
 * contracts as defined in https://eips.ethereum.org/EIPS/eip-1271[ERC-1271].
 */
interface IERC1271 {
    /**
     * @dev Should return whether the signature provided is valid for the provided data
     * @param hash      Hash of the data to be signed
     * @param signature Signature byte array associated with `hash`
     */
    function isValidSignature(bytes32 hash, bytes calldata signature) external view returns (bytes4 magicValue);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (token/ERC20/IERC20.sol)

pragma solidity >=0.4.16;

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

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

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

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

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (token/ERC721/IERC721Receiver.sol)

pragma solidity >=0.5.0;

/**
 * @title ERC-721 token receiver interface
 * @dev Interface for any contract that wants to support safeTransfers
 * from ERC-721 asset contracts.
 */
interface IERC721Receiver {
    /**
     * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
     * by `operator` from `from`, this function is called.
     *
     * It must return its Solidity selector to confirm the token transfer.
     * If any other value is returned or the interface is not implemented by the recipient, the transfer will be
     * reverted.
     *
     * The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`.
     */
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external returns (bytes4);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (utils/introspection/IERC165.sol)

pragma solidity >=0.4.16;

/**
 * @dev Interface of the ERC-165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[ERC].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[ERC section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

/// @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 directly use signatures as unique identifiers:
/// - The recovery operations do NOT check if a signature is non-malleable.
/// - 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.
/// - If you need a unique hash from a signature, please use the `canonicalHash` functions.
library ECDSA {
    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                         CONSTANTS                          */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev The order of the secp256k1 elliptic curve.
    uint256 internal constant N = 0xfffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd0364141;

    /// @dev `N/2 + 1`. Used for checking the malleability of the signature.
    uint256 private constant _HALF_N_PLUS_1 =
        0x7fffffffffffffffffffffffffffffff5d576e7357a4501ddfe92f46681b20a1;

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                        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 {
            for { let m := mload(0x40) } 1 {
                mstore(0x00, 0x8baa579f) // `InvalidSignature()`.
                revert(0x1c, 0x04)
            } {
                switch mload(signature)
                case 64 {
                    let vs := mload(add(signature, 0x40))
                    mstore(0x20, add(shr(255, vs), 27)) // `v`.
                    mstore(0x60, shr(1, shl(1, vs))) // `s`.
                }
                case 65 {
                    mstore(0x20, byte(0, mload(add(signature, 0x60)))) // `v`.
                    mstore(0x60, mload(add(signature, 0x40))) // `s`.
                }
                default { continue }
                mstore(0x00, hash)
                mstore(0x40, mload(add(signature, 0x20))) // `r`.
                result := mload(staticcall(gas(), 1, 0x00, 0x80, 0x01, 0x20))
                mstore(0x60, 0) // Restore the zero slot.
                mstore(0x40, m) // Restore the free memory pointer.
                // `returndatasize()` will be `0x20` upon success, and `0x00` otherwise.
                if returndatasize() { break }
            }
        }
    }

    /// @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 {
            for { let m := mload(0x40) } 1 {
                mstore(0x00, 0x8baa579f) // `InvalidSignature()`.
                revert(0x1c, 0x04)
            } {
                switch signature.length
                case 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`.
                }
                case 65 {
                    mstore(0x20, byte(0, calldataload(add(signature.offset, 0x40)))) // `v`.
                    calldatacopy(0x40, signature.offset, 0x40) // Copy `r` and `s`.
                }
                default { continue }
                mstore(0x00, hash)
                result := mload(staticcall(gas(), 1, 0x00, 0x80, 0x01, 0x20))
                mstore(0x60, 0) // Restore the zero slot.
                mstore(0x40, m) // Restore the free memory pointer.
                // `returndatasize()` will be `0x20` upon success, and `0x00` otherwise.
                if returndatasize() { break }
            }
        }
    }

    /// @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(), 1, 0x00, 0x80, 0x01, 0x20))
            // `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(), 1, 0x00, 0x80, 0x01, 0x20))
            // `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 {
            for { let m := mload(0x40) } 1 {} {
                switch mload(signature)
                case 64 {
                    let vs := mload(add(signature, 0x40))
                    mstore(0x20, add(shr(255, vs), 27)) // `v`.
                    mstore(0x60, shr(1, shl(1, vs))) // `s`.
                }
                case 65 {
                    mstore(0x20, byte(0, mload(add(signature, 0x60)))) // `v`.
                    mstore(0x60, mload(add(signature, 0x40))) // `s`.
                }
                default { break }
                mstore(0x00, hash)
                mstore(0x40, mload(add(signature, 0x20))) // `r`.
                pop(staticcall(gas(), 1, 0x00, 0x80, 0x40, 0x20))
                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.
                break
            }
        }
    }

    /// @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 {
            for { let m := mload(0x40) } 1 {} {
                switch signature.length
                case 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`.
                }
                case 65 {
                    mstore(0x20, byte(0, calldataload(add(signature.offset, 0x40)))) // `v`.
                    calldatacopy(0x40, signature.offset, 0x40) // Copy `r` and `s`.
                }
                default { break }
                mstore(0x00, hash)
                pop(staticcall(gas(), 1, 0x00, 0x80, 0x40, 0x20))
                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.
                break
            }
        }
    }

    /// @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(), 1, 0x00, 0x80, 0x40, 0x20))
            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(), 1, 0x00, 0x80, 0x40, 0x20))
            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://ethereum.org/en/developers/docs/apis/json-rpc/#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:\n32") // 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://ethereum.org/en/developers/docs/apis/json-rpc/#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:\n") // 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.
        }
    }

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                  CANONICAL HASH FUNCTIONS                  */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    // The following functions return the hash of the signature in its canonicalized format,
    // which is the 65-byte `abi.encodePacked(r, s, uint8(v))`, where `v` is either 27 or 28.
    // If `s` is greater than `N / 2` then it will be converted to `N - s`
    // and the `v` value will be flipped.
    // If the signature has an invalid length, or if `v` is invalid,
    // a uniquely corrupt hash will be returned.
    // These functions are useful for "poor-mans-VRF".

    /// @dev Returns the canonical hash of `signature`.
    function canonicalHash(bytes memory signature) internal pure returns (bytes32 result) {
        /// @solidity memory-safe-assembly
        assembly {
            let l := mload(signature)
            for {} 1 {} {
                mstore(0x00, mload(add(signature, 0x20))) // `r`.
                let s := mload(add(signature, 0x40))
                let v := mload(add(signature, 0x41))
                if eq(l, 64) {
                    v := add(shr(255, s), 27)
                    s := shr(1, shl(1, s))
                }
                if iszero(lt(s, _HALF_N_PLUS_1)) {
                    v := xor(v, 7)
                    s := sub(N, s)
                }
                mstore(0x21, v)
                mstore(0x20, s)
                result := keccak256(0x00, 0x41)
                mstore(0x21, 0) // Restore the overwritten part of the free memory pointer.
                break
            }

            // If the length is neither 64 nor 65, return a uniquely corrupted hash.
            if iszero(lt(sub(l, 64), 2)) {
                // `bytes4(keccak256("InvalidSignatureLength"))`.
                result := xor(keccak256(add(signature, 0x20), l), 0xd62f1ab2)
            }
        }
    }

    /// @dev Returns the canonical hash of `signature`.
    function canonicalHashCalldata(bytes calldata signature)
        internal
        pure
        returns (bytes32 result)
    {
        /// @solidity memory-safe-assembly
        assembly {
            for {} 1 {} {
                mstore(0x00, calldataload(signature.offset)) // `r`.
                let s := calldataload(add(signature.offset, 0x20))
                let v := calldataload(add(signature.offset, 0x21))
                if eq(signature.length, 64) {
                    v := add(shr(255, s), 27)
                    s := shr(1, shl(1, s))
                }
                if iszero(lt(s, _HALF_N_PLUS_1)) {
                    v := xor(v, 7)
                    s := sub(N, s)
                }
                mstore(0x21, v)
                mstore(0x20, s)
                result := keccak256(0x00, 0x41)
                mstore(0x21, 0) // Restore the overwritten part of the free memory pointer.
                break
            }
            // If the length is neither 64 nor 65, return a uniquely corrupted hash.
            if iszero(lt(sub(signature.length, 64), 2)) {
                calldatacopy(mload(0x40), signature.offset, signature.length)
                // `bytes4(keccak256("InvalidSignatureLength"))`.
                result := xor(keccak256(mload(0x40), signature.length), 0xd62f1ab2)
            }
        }
    }

    /// @dev Returns the canonical hash of `signature`.
    function canonicalHash(bytes32 r, bytes32 vs) internal pure returns (bytes32 result) {
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x00, r) // `r`.
            let v := add(shr(255, vs), 27)
            let s := shr(1, shl(1, vs))
            mstore(0x21, v)
            mstore(0x20, s)
            result := keccak256(0x00, 0x41)
            mstore(0x21, 0) // Restore the overwritten part of the free memory pointer.
        }
    }

    /// @dev Returns the canonical hash of `signature`.
    function canonicalHash(uint8 v, bytes32 r, bytes32 s) internal pure returns (bytes32 result) {
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x00, r) // `r`.
            if iszero(lt(s, _HALF_N_PLUS_1)) {
                v := xor(v, 7)
                s := sub(N, s)
            }
            mstore(0x21, v)
            mstore(0x20, s)
            result := keccak256(0x00, 0x41)
            mstore(0x21, 0) // Restore the overwritten part of the free memory pointer.
        }
    }

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                   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
pragma solidity ^0.8.4;

/// @notice Safe ETH and ERC20 transfer library that gracefully handles missing return values.
/// @author Solady (https://github.com/vectorized/solady/blob/main/src/utils/SafeTransferLib.sol)
/// @author Modified from Solmate (https://github.com/transmissions11/solmate/blob/main/src/utils/SafeTransferLib.sol)
/// @author Permit2 operations from (https://github.com/Uniswap/permit2/blob/main/src/libraries/Permit2Lib.sol)
///
/// @dev Note:
/// - For ETH transfers, please use `forceSafeTransferETH` for DoS protection.
library SafeTransferLib {
    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                       CUSTOM ERRORS                        */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev The ETH transfer has failed.
    error ETHTransferFailed();

    /// @dev The ERC20 `transferFrom` has failed.
    error TransferFromFailed();

    /// @dev The ERC20 `transfer` has failed.
    error TransferFailed();

    /// @dev The ERC20 `approve` has failed.
    error ApproveFailed();

    /// @dev The ERC20 `totalSupply` query has failed.
    error TotalSupplyQueryFailed();

    /// @dev The Permit2 operation has failed.
    error Permit2Failed();

    /// @dev The Permit2 amount must be less than `2**160 - 1`.
    error Permit2AmountOverflow();

    /// @dev The Permit2 approve operation has failed.
    error Permit2ApproveFailed();

    /// @dev The Permit2 lockdown operation has failed.
    error Permit2LockdownFailed();

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                         CONSTANTS                          */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev Suggested gas stipend for contract receiving ETH that disallows any storage writes.
    uint256 internal constant GAS_STIPEND_NO_STORAGE_WRITES = 2300;

    /// @dev Suggested gas stipend for contract receiving ETH to perform a few
    /// storage reads and writes, but low enough to prevent griefing.
    uint256 internal constant GAS_STIPEND_NO_GRIEF = 100000;

    /// @dev The unique EIP-712 domain separator for the DAI token contract.
    bytes32 internal constant DAI_DOMAIN_SEPARATOR =
        0xdbb8cf42e1ecb028be3f3dbc922e1d878b963f411dc388ced501601c60f7c6f7;

    /// @dev The address for the WETH9 contract on Ethereum mainnet.
    address internal constant WETH9 = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;

    /// @dev The canonical Permit2 address.
    /// [Github](https://github.com/Uniswap/permit2)
    /// [Etherscan](https://etherscan.io/address/0x000000000022D473030F116dDEE9F6B43aC78BA3)
    address internal constant PERMIT2 = 0x000000000022D473030F116dDEE9F6B43aC78BA3;

    /// @dev The canonical address of the `SELFDESTRUCT` ETH mover.
    /// See: https://gist.github.com/Vectorized/1cb8ad4cf393b1378e08f23f79bd99fa
    /// [Etherscan](https://etherscan.io/address/0x00000000000073c48c8055bD43D1A53799176f0D)
    address internal constant ETH_MOVER = 0x00000000000073c48c8055bD43D1A53799176f0D;

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                       ETH OPERATIONS                       */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    // If the ETH transfer MUST succeed with a reasonable gas budget, use the force variants.
    //
    // The regular variants:
    // - Forwards all remaining gas to the target.
    // - Reverts if the target reverts.
    // - Reverts if the current contract has insufficient balance.
    //
    // The force variants:
    // - Forwards with an optional gas stipend
    //   (defaults to `GAS_STIPEND_NO_GRIEF`, which is sufficient for most cases).
    // - If the target reverts, or if the gas stipend is exhausted,
    //   creates a temporary contract to force send the ETH via `SELFDESTRUCT`.
    //   Future compatible with `SENDALL`: https://eips.ethereum.org/EIPS/eip-4758.
    // - Reverts if the current contract has insufficient balance.
    //
    // The try variants:
    // - Forwards with a mandatory gas stipend.
    // - Instead of reverting, returns whether the transfer succeeded.

    /// @dev Sends `amount` (in wei) ETH to `to`.
    function safeTransferETH(address to, uint256 amount) internal {
        /// @solidity memory-safe-assembly
        assembly {
            if iszero(call(gas(), to, amount, codesize(), 0x00, codesize(), 0x00)) {
                mstore(0x00, 0xb12d13eb) // `ETHTransferFailed()`.
                revert(0x1c, 0x04)
            }
        }
    }

    /// @dev Sends all the ETH in the current contract to `to`.
    function safeTransferAllETH(address to) internal {
        /// @solidity memory-safe-assembly
        assembly {
            // Transfer all the ETH and check if it succeeded or not.
            if iszero(call(gas(), to, selfbalance(), codesize(), 0x00, codesize(), 0x00)) {
                mstore(0x00, 0xb12d13eb) // `ETHTransferFailed()`.
                revert(0x1c, 0x04)
            }
        }
    }

    /// @dev Force sends `amount` (in wei) ETH to `to`, with a `gasStipend`.
    function forceSafeTransferETH(address to, uint256 amount, uint256 gasStipend) internal {
        /// @solidity memory-safe-assembly
        assembly {
            if lt(selfbalance(), amount) {
                mstore(0x00, 0xb12d13eb) // `ETHTransferFailed()`.
                revert(0x1c, 0x04)
            }
            if iszero(call(gasStipend, to, amount, codesize(), 0x00, codesize(), 0x00)) {
                mstore(0x00, to) // Store the address in scratch space.
                mstore8(0x0b, 0x73) // Opcode `PUSH20`.
                mstore8(0x20, 0xff) // Opcode `SELFDESTRUCT`.
                if iszero(create(amount, 0x0b, 0x16)) { revert(codesize(), codesize()) } // For gas estimation.
            }
        }
    }

    /// @dev Force sends all the ETH in the current contract to `to`, with a `gasStipend`.
    function forceSafeTransferAllETH(address to, uint256 gasStipend) internal {
        /// @solidity memory-safe-assembly
        assembly {
            if iszero(call(gasStipend, to, selfbalance(), codesize(), 0x00, codesize(), 0x00)) {
                mstore(0x00, to) // Store the address in scratch space.
                mstore8(0x0b, 0x73) // Opcode `PUSH20`.
                mstore8(0x20, 0xff) // Opcode `SELFDESTRUCT`.
                if iszero(create(selfbalance(), 0x0b, 0x16)) { revert(codesize(), codesize()) } // For gas estimation.
            }
        }
    }

    /// @dev Force sends `amount` (in wei) ETH to `to`, with `GAS_STIPEND_NO_GRIEF`.
    function forceSafeTransferETH(address to, uint256 amount) internal {
        /// @solidity memory-safe-assembly
        assembly {
            if lt(selfbalance(), amount) {
                mstore(0x00, 0xb12d13eb) // `ETHTransferFailed()`.
                revert(0x1c, 0x04)
            }
            if iszero(call(GAS_STIPEND_NO_GRIEF, to, amount, codesize(), 0x00, codesize(), 0x00)) {
                mstore(0x00, to) // Store the address in scratch space.
                mstore8(0x0b, 0x73) // Opcode `PUSH20`.
                mstore8(0x20, 0xff) // Opcode `SELFDESTRUCT`.
                if iszero(create(amount, 0x0b, 0x16)) { revert(codesize(), codesize()) } // For gas estimation.
            }
        }
    }

    /// @dev Force sends all the ETH in the current contract to `to`, with `GAS_STIPEND_NO_GRIEF`.
    function forceSafeTransferAllETH(address to) internal {
        /// @solidity memory-safe-assembly
        assembly {
            // forgefmt: disable-next-item
            if iszero(call(GAS_STIPEND_NO_GRIEF, to, selfbalance(), codesize(), 0x00, codesize(), 0x00)) {
                mstore(0x00, to) // Store the address in scratch space.
                mstore8(0x0b, 0x73) // Opcode `PUSH20`.
                mstore8(0x20, 0xff) // Opcode `SELFDESTRUCT`.
                if iszero(create(selfbalance(), 0x0b, 0x16)) { revert(codesize(), codesize()) } // For gas estimation.
            }
        }
    }

    /// @dev Sends `amount` (in wei) ETH to `to`, with a `gasStipend`.
    function trySafeTransferETH(address to, uint256 amount, uint256 gasStipend)
        internal
        returns (bool success)
    {
        /// @solidity memory-safe-assembly
        assembly {
            success := call(gasStipend, to, amount, codesize(), 0x00, codesize(), 0x00)
        }
    }

    /// @dev Sends all the ETH in the current contract to `to`, with a `gasStipend`.
    function trySafeTransferAllETH(address to, uint256 gasStipend)
        internal
        returns (bool success)
    {
        /// @solidity memory-safe-assembly
        assembly {
            success := call(gasStipend, to, selfbalance(), codesize(), 0x00, codesize(), 0x00)
        }
    }

    /// @dev Force transfers ETH to `to`, without triggering the fallback (if any).
    /// This method attempts to use a separate contract to send via `SELFDESTRUCT`,
    /// and upon failure, deploys a minimal vault to accrue the ETH.
    function safeMoveETH(address to, uint256 amount) internal returns (address vault) {
        /// @solidity memory-safe-assembly
        assembly {
            to := shr(96, shl(96, to)) // Clean upper 96 bits.
            for { let mover := ETH_MOVER } iszero(eq(to, address())) {} {
                let selfBalanceBefore := selfbalance()
                if or(lt(selfBalanceBefore, amount), eq(to, mover)) {
                    mstore(0x00, 0xb12d13eb) // `ETHTransferFailed()`.
                    revert(0x1c, 0x04)
                }
                if extcodesize(mover) {
                    let balanceBefore := balance(to) // Check via delta, in case `SELFDESTRUCT` is bricked.
                    mstore(0x00, to)
                    pop(call(gas(), mover, amount, 0x00, 0x20, codesize(), 0x00))
                    // If `address(to).balance >= amount + balanceBefore`, skip vault workflow.
                    if iszero(lt(balance(to), add(amount, balanceBefore))) { break }
                    // Just in case `SELFDESTRUCT` is changed to not revert and do nothing.
                    if lt(selfBalanceBefore, selfbalance()) { invalid() }
                }
                let m := mload(0x40)
                // If the mover is missing or bricked, deploy a minimal vault
                // that withdraws all ETH to `to` when being called only by `to`.
                // forgefmt: disable-next-item
                mstore(add(m, 0x20), 0x33146025575b600160005260206000f35b3d3d3d3d47335af1601a5760003dfd)
                mstore(m, or(to, shl(160, 0x6035600b3d3960353df3fe73)))
                // Compute and store the bytecode hash.
                mstore8(0x00, 0xff) // Write the prefix.
                mstore(0x35, keccak256(m, 0x40))
                mstore(0x01, shl(96, address())) // Deployer.
                mstore(0x15, 0) // Salt.
                vault := keccak256(0x00, 0x55)
                pop(call(gas(), vault, amount, codesize(), 0x00, codesize(), 0x00))
                // The vault returns a single word on success. Failure reverts with empty data.
                if iszero(returndatasize()) {
                    if iszero(create2(0, m, 0x40, 0)) { revert(codesize(), codesize()) } // For gas estimation.
                }
                mstore(0x40, m) // Restore the free memory pointer.
                break
            }
        }
    }

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                      ERC20 OPERATIONS                      */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev Sends `amount` of ERC20 `token` from `from` to `to`.
    /// Reverts upon failure.
    ///
    /// The `from` account must have at least `amount` approved for
    /// the current contract to manage.
    function safeTransferFrom(address token, address from, address to, uint256 amount) internal {
        /// @solidity memory-safe-assembly
        assembly {
            let m := mload(0x40) // Cache the free memory pointer.
            mstore(0x60, amount) // Store the `amount` argument.
            mstore(0x40, to) // Store the `to` argument.
            mstore(0x2c, shl(96, from)) // Store the `from` argument.
            mstore(0x0c, 0x23b872dd000000000000000000000000) // `transferFrom(address,address,uint256)`.
            let success := call(gas(), token, 0, 0x1c, 0x64, 0x00, 0x20)
            if iszero(and(eq(mload(0x00), 1), success)) {
                if iszero(lt(or(iszero(extcodesize(token)), returndatasize()), success)) {
                    mstore(0x00, 0x7939f424) // `TransferFromFailed()`.
                    revert(0x1c, 0x04)
                }
            }
            mstore(0x60, 0) // Restore the zero slot to zero.
            mstore(0x40, m) // Restore the free memory pointer.
        }
    }

    /// @dev Sends `amount` of ERC20 `token` from `from` to `to`.
    ///
    /// The `from` account must have at least `amount` approved for the current contract to manage.
    function trySafeTransferFrom(address token, address from, address to, uint256 amount)
        internal
        returns (bool success)
    {
        /// @solidity memory-safe-assembly
        assembly {
            let m := mload(0x40) // Cache the free memory pointer.
            mstore(0x60, amount) // Store the `amount` argument.
            mstore(0x40, to) // Store the `to` argument.
            mstore(0x2c, shl(96, from)) // Store the `from` argument.
            mstore(0x0c, 0x23b872dd000000000000000000000000) // `transferFrom(address,address,uint256)`.
            success := call(gas(), token, 0, 0x1c, 0x64, 0x00, 0x20)
            if iszero(and(eq(mload(0x00), 1), success)) {
                success := lt(or(iszero(extcodesize(token)), returndatasize()), success)
            }
            mstore(0x60, 0) // Restore the zero slot to zero.
            mstore(0x40, m) // Restore the free memory pointer.
        }
    }

    /// @dev Sends all of ERC20 `token` from `from` to `to`.
    /// Reverts upon failure.
    ///
    /// The `from` account must have their entire balance approved for the current contract to manage.
    function safeTransferAllFrom(address token, address from, address to)
        internal
        returns (uint256 amount)
    {
        /// @solidity memory-safe-assembly
        assembly {
            let m := mload(0x40) // Cache the free memory pointer.
            mstore(0x40, to) // Store the `to` argument.
            mstore(0x2c, shl(96, from)) // Store the `from` argument.
            mstore(0x0c, 0x70a08231000000000000000000000000) // `balanceOf(address)`.
            // Read the balance, reverting upon failure.
            if iszero(
                and( // The arguments of `and` are evaluated from right to left.
                    gt(returndatasize(), 0x1f), // At least 32 bytes returned.
                    staticcall(gas(), token, 0x1c, 0x24, 0x60, 0x20)
                )
            ) {
                mstore(0x00, 0x7939f424) // `TransferFromFailed()`.
                revert(0x1c, 0x04)
            }
            mstore(0x00, 0x23b872dd) // `transferFrom(address,address,uint256)`.
            amount := mload(0x60) // The `amount` is already at 0x60. We'll need to return it.
            // Perform the transfer, reverting upon failure.
            let success := call(gas(), token, 0, 0x1c, 0x64, 0x00, 0x20)
            if iszero(and(eq(mload(0x00), 1), success)) {
                if iszero(lt(or(iszero(extcodesize(token)), returndatasize()), success)) {
                    mstore(0x00, 0x7939f424) // `TransferFromFailed()`.
                    revert(0x1c, 0x04)
                }
            }
            mstore(0x60, 0) // Restore the zero slot to zero.
            mstore(0x40, m) // Restore the free memory pointer.
        }
    }

    /// @dev Sends `amount` of ERC20 `token` from the current contract to `to`.
    /// Reverts upon failure.
    function safeTransfer(address token, address to, uint256 amount) internal {
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x14, to) // Store the `to` argument.
            mstore(0x34, amount) // Store the `amount` argument.
            mstore(0x00, 0xa9059cbb000000000000000000000000) // `transfer(address,uint256)`.
            // Perform the transfer, reverting upon failure.
            let success := call(gas(), token, 0, 0x10, 0x44, 0x00, 0x20)
            if iszero(and(eq(mload(0x00), 1), success)) {
                if iszero(lt(or(iszero(extcodesize(token)), returndatasize()), success)) {
                    mstore(0x00, 0x90b8ec18) // `TransferFailed()`.
                    revert(0x1c, 0x04)
                }
            }
            mstore(0x34, 0) // Restore the part of the free memory pointer that was overwritten.
        }
    }

    /// @dev Sends all of ERC20 `token` from the current contract to `to`.
    /// Reverts upon failure.
    function safeTransferAll(address token, address to) internal returns (uint256 amount) {
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x00, 0x70a08231) // Store the function selector of `balanceOf(address)`.
            mstore(0x20, address()) // Store the address of the current contract.
            // Read the balance, reverting upon failure.
            if iszero(
                and( // The arguments of `and` are evaluated from right to left.
                    gt(returndatasize(), 0x1f), // At least 32 bytes returned.
                    staticcall(gas(), token, 0x1c, 0x24, 0x34, 0x20)
                )
            ) {
                mstore(0x00, 0x90b8ec18) // `TransferFailed()`.
                revert(0x1c, 0x04)
            }
            mstore(0x14, to) // Store the `to` argument.
            amount := mload(0x34) // The `amount` is already at 0x34. We'll need to return it.
            mstore(0x00, 0xa9059cbb000000000000000000000000) // `transfer(address,uint256)`.
            // Perform the transfer, reverting upon failure.
            let success := call(gas(), token, 0, 0x10, 0x44, 0x00, 0x20)
            if iszero(and(eq(mload(0x00), 1), success)) {
                if iszero(lt(or(iszero(extcodesize(token)), returndatasize()), success)) {
                    mstore(0x00, 0x90b8ec18) // `TransferFailed()`.
                    revert(0x1c, 0x04)
                }
            }
            mstore(0x34, 0) // Restore the part of the free memory pointer that was overwritten.
        }
    }

    /// @dev Sets `amount` of ERC20 `token` for `to` to manage on behalf of the current contract.
    /// Reverts upon failure.
    function safeApprove(address token, address to, uint256 amount) internal {
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x14, to) // Store the `to` argument.
            mstore(0x34, amount) // Store the `amount` argument.
            mstore(0x00, 0x095ea7b3000000000000000000000000) // `approve(address,uint256)`.
            let success := call(gas(), token, 0, 0x10, 0x44, 0x00, 0x20)
            if iszero(and(eq(mload(0x00), 1), success)) {
                if iszero(lt(or(iszero(extcodesize(token)), returndatasize()), success)) {
                    mstore(0x00, 0x3e3f8f73) // `ApproveFailed()`.
                    revert(0x1c, 0x04)
                }
            }
            mstore(0x34, 0) // Restore the part of the free memory pointer that was overwritten.
        }
    }

    /// @dev Sets `amount` of ERC20 `token` for `to` to manage on behalf of the current contract.
    /// If the initial attempt to approve fails, attempts to reset the approved amount to zero,
    /// then retries the approval again (some tokens, e.g. USDT, requires this).
    /// Reverts upon failure.
    function safeApproveWithRetry(address token, address to, uint256 amount) internal {
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x14, to) // Store the `to` argument.
            mstore(0x34, amount) // Store the `amount` argument.
            mstore(0x00, 0x095ea7b3000000000000000000000000) // `approve(address,uint256)`.
            // Perform the approval, retrying upon failure.
            let success := call(gas(), token, 0, 0x10, 0x44, 0x00, 0x20)
            if iszero(and(eq(mload(0x00), 1), success)) {
                if iszero(lt(or(iszero(extcodesize(token)), returndatasize()), success)) {
                    mstore(0x34, 0) // Store 0 for the `amount`.
                    mstore(0x00, 0x095ea7b3000000000000000000000000) // `approve(address,uint256)`.
                    pop(call(gas(), token, 0, 0x10, 0x44, codesize(), 0x00)) // Reset the approval.
                    mstore(0x34, amount) // Store back the original `amount`.
                    // Retry the approval, reverting upon failure.
                    success := call(gas(), token, 0, 0x10, 0x44, 0x00, 0x20)
                    if iszero(and(eq(mload(0x00), 1), success)) {
                        // Check the `extcodesize` again just in case the token selfdestructs lol.
                        if iszero(lt(or(iszero(extcodesize(token)), returndatasize()), success)) {
                            mstore(0x00, 0x3e3f8f73) // `ApproveFailed()`.
                            revert(0x1c, 0x04)
                        }
                    }
                }
            }
            mstore(0x34, 0) // Restore the part of the free memory pointer that was overwritten.
        }
    }

    /// @dev Returns the amount of ERC20 `token` owned by `account`.
    /// Returns zero if the `token` does not exist.
    function balanceOf(address token, address account) internal view returns (uint256 amount) {
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x14, account) // Store the `account` argument.
            mstore(0x00, 0x70a08231000000000000000000000000) // `balanceOf(address)`.
            amount :=
                mul( // The arguments of `mul` are evaluated from right to left.
                    mload(0x20),
                    and( // The arguments of `and` are evaluated from right to left.
                        gt(returndatasize(), 0x1f), // At least 32 bytes returned.
                        staticcall(gas(), token, 0x10, 0x24, 0x20, 0x20)
                    )
                )
        }
    }

    /// @dev Performs a `token.balanceOf(account)` check.
    /// `implemented` denotes whether the `token` does not implement `balanceOf`.
    /// `amount` is zero if the `token` does not implement `balanceOf`.
    function checkBalanceOf(address token, address account)
        internal
        view
        returns (bool implemented, uint256 amount)
    {
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x14, account) // Store the `account` argument.
            mstore(0x00, 0x70a08231000000000000000000000000) // `balanceOf(address)`.
            implemented :=
                and( // The arguments of `and` are evaluated from right to left.
                    gt(returndatasize(), 0x1f), // At least 32 bytes returned.
                    staticcall(gas(), token, 0x10, 0x24, 0x20, 0x20)
                )
            amount := mul(mload(0x20), implemented)
        }
    }

    /// @dev Returns the total supply of the `token`.
    /// Reverts if the token does not exist or does not implement `totalSupply()`.
    function totalSupply(address token) internal view returns (uint256 result) {
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x00, 0x18160ddd) // `totalSupply()`.
            if iszero(
                and(gt(returndatasize(), 0x1f), staticcall(gas(), token, 0x1c, 0x04, 0x00, 0x20))
            ) {
                mstore(0x00, 0x54cd9435) // `TotalSupplyQueryFailed()`.
                revert(0x1c, 0x04)
            }
            result := mload(0x00)
        }
    }

    /// @dev Sends `amount` of ERC20 `token` from `from` to `to`.
    /// If the initial attempt fails, try to use Permit2 to transfer the token.
    /// Reverts upon failure.
    ///
    /// The `from` account must have at least `amount` approved for the current contract to manage.
    function safeTransferFrom2(address token, address from, address to, uint256 amount) internal {
        if (!trySafeTransferFrom(token, from, to, amount)) {
            permit2TransferFrom(token, from, to, amount);
        }
    }

    /// @dev Sends `amount` of ERC20 `token` from `from` to `to` via Permit2.
    /// Reverts upon failure.
    function permit2TransferFrom(address token, address from, address to, uint256 amount)
        internal
    {
        /// @solidity memory-safe-assembly
        assembly {
            let m := mload(0x40)
            mstore(add(m, 0x74), shr(96, shl(96, token)))
            mstore(add(m, 0x54), amount)
            mstore(add(m, 0x34), to)
            mstore(add(m, 0x20), shl(96, from))
            // `transferFrom(address,address,uint160,address)`.
            mstore(m, 0x36c78516000000000000000000000000)
            let p := PERMIT2
            let exists := eq(chainid(), 1)
            if iszero(exists) { exists := iszero(iszero(extcodesize(p))) }
            if iszero(
                and(
                    call(gas(), p, 0, add(m, 0x10), 0x84, codesize(), 0x00),
                    lt(iszero(extcodesize(token)), exists) // Token has code and Permit2 exists.
                )
            ) {
                mstore(0x00, 0x7939f4248757f0fd) // `TransferFromFailed()` or `Permit2AmountOverflow()`.
                revert(add(0x18, shl(2, iszero(iszero(shr(160, amount))))), 0x04)
            }
        }
    }

    /// @dev Permit a user to spend a given amount of
    /// another user's tokens via native EIP-2612 permit if possible, falling
    /// back to Permit2 if native permit fails or is not implemented on the token.
    function permit2(
        address token,
        address owner,
        address spender,
        uint256 amount,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal {
        bool success;
        /// @solidity memory-safe-assembly
        assembly {
            for {} shl(96, xor(token, WETH9)) {} {
                mstore(0x00, 0x3644e515) // `DOMAIN_SEPARATOR()`.
                if iszero(
                    and( // The arguments of `and` are evaluated from right to left.
                        lt(iszero(mload(0x00)), eq(returndatasize(), 0x20)), // Returns 1 non-zero word.
                        // Gas stipend to limit gas burn for tokens that don't refund gas when
                        // an non-existing function is called. 5K should be enough for a SLOAD.
                        staticcall(5000, token, 0x1c, 0x04, 0x00, 0x20)
                    )
                ) { break }
                // After here, we can be sure that token is a contract.
                let m := mload(0x40)
                mstore(add(m, 0x34), spender)
                mstore(add(m, 0x20), shl(96, owner))
                mstore(add(m, 0x74), deadline)
                if eq(mload(0x00), DAI_DOMAIN_SEPARATOR) {
                    mstore(0x14, owner)
                    mstore(0x00, 0x7ecebe00000000000000000000000000) // `nonces(address)`.
                    mstore(
                        add(m, 0x94),
                        lt(iszero(amount), staticcall(gas(), token, 0x10, 0x24, add(m, 0x54), 0x20))
                    )
                    mstore(m, 0x8fcbaf0c000000000000000000000000) // `IDAIPermit.permit`.
                    // `nonces` is already at `add(m, 0x54)`.
                    // `amount != 0` is already stored at `add(m, 0x94)`.
                    mstore(add(m, 0xb4), and(0xff, v))
                    mstore(add(m, 0xd4), r)
                    mstore(add(m, 0xf4), s)
                    success := call(gas(), token, 0, add(m, 0x10), 0x104, codesize(), 0x00)
                    break
                }
                mstore(m, 0xd505accf000000000000000000000000) // `IERC20Permit.permit`.
                mstore(add(m, 0x54), amount)
                mstore(add(m, 0x94), and(0xff, v))
                mstore(add(m, 0xb4), r)
                mstore(add(m, 0xd4), s)
                success := call(gas(), token, 0, add(m, 0x10), 0xe4, codesize(), 0x00)
                break
            }
        }
        if (!success) simplePermit2(token, owner, spender, amount, deadline, v, r, s);
    }

    /// @dev Simple permit on the Permit2 contract.
    function simplePermit2(
        address token,
        address owner,
        address spender,
        uint256 amount,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal {
        /// @solidity memory-safe-assembly
        assembly {
            let m := mload(0x40)
            mstore(m, 0x927da105) // `allowance(address,address,address)`.
            {
                let addressMask := shr(96, not(0))
                mstore(add(m, 0x20), and(addressMask, owner))
                mstore(add(m, 0x40), and(addressMask, token))
                mstore(add(m, 0x60), and(addressMask, spender))
                mstore(add(m, 0xc0), and(addressMask, spender))
            }
            let p := mul(PERMIT2, iszero(shr(160, amount)))
            if iszero(
                and( // The arguments of `and` are evaluated from right to left.
                    gt(returndatasize(), 0x5f), // Returns 3 words: `amount`, `expiration`, `nonce`.
                    staticcall(gas(), p, add(m, 0x1c), 0x64, add(m, 0x60), 0x60)
                )
            ) {
                mstore(0x00, 0x6b836e6b8757f0fd) // `Permit2Failed()` or `Permit2AmountOverflow()`.
                revert(add(0x18, shl(2, iszero(p))), 0x04)
            }
            mstore(m, 0x2b67b570) // `Permit2.permit` (PermitSingle variant).
            // `owner` is already `add(m, 0x20)`.
            // `token` is already at `add(m, 0x40)`.
            mstore(add(m, 0x60), amount)
            mstore(add(m, 0x80), 0xffffffffffff) // `expiration = type(uint48).max`.
            // `nonce` is already at `add(m, 0xa0)`.
            // `spender` is already at `add(m, 0xc0)`.
            mstore(add(m, 0xe0), deadline)
            mstore(add(m, 0x100), 0x100) // `signature` offset.
            mstore(add(m, 0x120), 0x41) // `signature` length.
            mstore(add(m, 0x140), r)
            mstore(add(m, 0x160), s)
            mstore(add(m, 0x180), shl(248, v))
            if iszero( // Revert if token does not have code, or if the call fails.
            mul(extcodesize(token), call(gas(), p, 0, add(m, 0x1c), 0x184, codesize(), 0x00))) {
                mstore(0x00, 0x6b836e6b) // `Permit2Failed()`.
                revert(0x1c, 0x04)
            }
        }
    }

    /// @dev Approves `spender` to spend `amount` of `token` for `address(this)`.
    function permit2Approve(address token, address spender, uint160 amount, uint48 expiration)
        internal
    {
        /// @solidity memory-safe-assembly
        assembly {
            let addressMask := shr(96, not(0))
            let m := mload(0x40)
            mstore(m, 0x87517c45) // `approve(address,address,uint160,uint48)`.
            mstore(add(m, 0x20), and(addressMask, token))
            mstore(add(m, 0x40), and(addressMask, spender))
            mstore(add(m, 0x60), and(addressMask, amount))
            mstore(add(m, 0x80), and(0xffffffffffff, expiration))
            if iszero(call(gas(), PERMIT2, 0, add(m, 0x1c), 0xa0, codesize(), 0x00)) {
                mstore(0x00, 0x324f14ae) // `Permit2ApproveFailed()`.
                revert(0x1c, 0x04)
            }
        }
    }

    /// @dev Revokes an approval for `token` and `spender` for `address(this)`.
    function permit2Lockdown(address token, address spender) internal {
        /// @solidity memory-safe-assembly
        assembly {
            let m := mload(0x40)
            mstore(m, 0xcc53287f) // `Permit2.lockdown`.
            mstore(add(m, 0x20), 0x20) // Offset of the `approvals`.
            mstore(add(m, 0x40), 1) // `approvals.length`.
            mstore(add(m, 0x60), shr(96, shl(96, token)))
            mstore(add(m, 0x80), shr(96, shl(96, spender)))
            if iszero(call(gas(), PERMIT2, 0, add(m, 0x1c), 0xa0, codesize(), 0x00)) {
                mstore(0x00, 0x96b3de23) // `Permit2LockdownFailed()`.
                revert(0x1c, 0x04)
            }
        }
    }
}

{
  "viaIR": true,
  "evmVersion": "cancun",
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "metadata": {
    "useLiteralContent": true
  }
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"address","name":"weth_","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"OnlyOwner","type":"error"},{"inputs":[],"name":"OwnerAlreadyExists","type":"error"},{"inputs":[],"name":"OwnerNotFound","type":"error"},{"inputs":[],"name":"WithdrawalFailed","type":"error"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bool","name":"enabled","type":"bool"}],"name":"AlwaysValidSignatureChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"token","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"ERC20Approved","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"token","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"ERC20Withdrawn","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"operator","type":"address"},{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"},{"indexed":false,"internalType":"address","name":"collection","type":"address"},{"indexed":false,"internalType":"bytes","name":"data","type":"bytes"}],"name":"NFTReceived","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"NativeWithdrawn","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnerAdded","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"removedOwner","type":"address"}],"name":"OwnerRemoved","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"balance","type":"uint256"}],"name":"WETHBalance","type":"event"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"addOwner","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"alwaysValidSignature","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approveERC20","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"getAdditionalOwners","outputs":[{"internalType":"address[]","name":"","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"isOwner","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"hash","type":"bytes32"},{"internalType":"bytes","name":"signature","type":"bytes"}],"name":"isValidSignature","outputs":[{"internalType":"bytes4","name":"magicValue","type":"bytes4"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"operator","type":"address"},{"internalType":"address","name":"from","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"onERC721Received","outputs":[{"internalType":"bytes4","name":"","type":"bytes4"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"ownerToRemove","type":"address"}],"name":"removeOwner","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bool","name":"enabled","type":"bool"}],"name":"setAlwaysValidSignature","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"weth","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"withdrawERC20","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"withdrawNative","outputs":[],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]

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

00000000000000000000000048b62137edfa95a428d35c09e44256a739f6b557

-----Decoded View---------------
Arg [0] : weth_ (address): 0x48b62137EdfA95a428D35C09E44256a739F6B557

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 00000000000000000000000048b62137edfa95a428d35c09e44256a739f6b557