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// SPDX-License-Identifier: GPL-3.0
pragma solidity =0.8.29 ^0.8.0;

// lib/openzeppelin-contracts/contracts/utils/Context.sol

// OpenZeppelin Contracts (last updated v4.9.4) (utils/Context.sol)

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}

// contracts/interfaces/hooks/IPostDispatchHook.sol

/*@@@@@@@       @@@@@@@@@
 @@@@@@@@@       @@@@@@@@@
  @@@@@@@@@       @@@@@@@@@
   @@@@@@@@@       @@@@@@@@@
    @@@@@@@@@@@@@@@@@@@@@@@@@
     @@@@@  HYPERLANE  @@@@@@@
    @@@@@@@@@@@@@@@@@@@@@@@@@
   @@@@@@@@@       @@@@@@@@@
  @@@@@@@@@       @@@@@@@@@
 @@@@@@@@@       @@@@@@@@@
@@@@@@@@@       @@@@@@@@*/

interface IPostDispatchHook {
    enum Types {
        UNUSED,
        ROUTING,
        AGGREGATION,
        MERKLE_TREE,
        INTERCHAIN_GAS_PAYMASTER,
        FALLBACK_ROUTING,
        ID_AUTH_ISM,
        PAUSABLE,
        PROTOCOL_FEE,
        LAYER_ZERO_V1,
        Rate_Limited_Hook
    }

    /**
     * @notice Returns an enum that represents the type of hook
     */
    function hookType() external view returns (uint8);

    /**
     * @notice Returns whether the hook supports metadata
     * @param metadata metadata
     * @return Whether the hook supports metadata
     */
    function supportsMetadata(
        bytes calldata metadata
    ) external view returns (bool);

    /**
     * @notice Post action after a message is dispatched via the Mailbox
     * @param metadata The metadata required for the hook
     * @param message The message passed from the Mailbox.dispatch() call
     */
    function postDispatch(
        bytes calldata metadata,
        bytes calldata message
    ) external payable;

    /**
     * @notice Compute the payment required by the postDispatch call
     * @param metadata The metadata required for the hook
     * @param message The message passed from the Mailbox.dispatch() call
     * @return Quoted payment for the postDispatch call
     */
    function quoteDispatch(
        bytes calldata metadata,
        bytes calldata message
    ) external view returns (uint256);
}

// lib/openzeppelin-contracts/contracts/security/ReentrancyGuard.sol

// OpenZeppelin Contracts (last updated v4.9.0) (security/ReentrancyGuard.sol)

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be _NOT_ENTERED
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;
    }

    function _nonReentrantAfter() private {
        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
     * `nonReentrant` function in the call stack.
     */
    function _reentrancyGuardEntered() internal view returns (bool) {
        return _status == _ENTERED;
    }
}

// contracts/libs/TypeCasts.sol

library TypeCasts {
    // alignment preserving cast
    function addressToBytes32(address _addr) internal pure returns (bytes32) {
        return bytes32(uint256(uint160(_addr)));
    }

    // alignment preserving cast
    function bytes32ToAddress(bytes32 _buf) internal pure returns (address) {
        return address(uint160(uint256(_buf)));
    }
}

// contracts/interfaces/hooks/IProtocolFeeHook.sol

interface IProtocolFeeHook is IPostDispatchHook {
    /// @notice Thrown when a message is already validated
    error MessageAlreadyValidated();

    /// @notice Thrown when the fee paid is insufficient
    error InsufficientFeePaid();

    /// @notice Thrown when the fee recipient is invalid
    error InvalidFeeRecipient();

    /// @notice Thrown when there is no balance to withdraw
    error NoBalanceToWithdraw();

    /// @notice Thrown when the mailbox address is unauthorized
    error UnauthorizedMailbox();

    /// @notice Thrown when the fee transfer fails
    error FeeTransferFailed();

    /// @notice Error thrown when an invalid address (zero address) is used.
    error InvalidAddress();

    /// @notice Emitted when a dispatch fee is paid
    /// @param requiredFee The required fee
    /// @param actualFee The actual fee paid
    /// @param messageId The id of the message
    event DispatchFeePaid(
        uint256 requiredFee,
        uint256 actualFee,
        bytes32 messageId
    );

    /// @notice Emitted when the trusted mailbox is updated
    /// @param previousMailBox The previous mailbox address
    /// @param newMailBox The new mailbox address
    event TrustedMailBoxUpdated(
        address indexed previousMailBox,
        address indexed newMailBox
    );

    /// @notice Emitted when the gas used per tx is updated
    /// @param previousGasUsed The previous gas used per tx
    /// @param newGasUsed The new gas used per tx
    event GasUsedPerTxUpdated(uint256 previousGasUsed, uint256 newGasUsed);

    /// @notice Emitted when the fees are withdrawn
    /// @param feeRecipient The address of the fee recipient
    /// @param amount The amount of fees withdrawn
    event FeesWithdrawn(address indexed feeRecipient, uint256 amount);

    /// @notice Emitted when the minimum fee is updated
    /// @param previousMinFee The previous minimum fee
    /// @param newMinFee The new minimum fee
    event MinFeeWeiUpdated(uint256 previousMinFee, uint256 newMinFee);

    /// @notice Thrown when there is insufficient balance to withdraw the requested amount
    error InsufficientBalance();
 

    /// @notice Sets the gas used per tx
    /// @param _gasUsedPerTx The new gas used per tx
    function setGasUsedPerTx(uint256 _gasUsedPerTx) external;

    /// @notice Withdraws the fees
    /// @param feeRecipient The address of the fee recipient
    function withdrawFees(address feeRecipient, uint256 amount) external;

    /// @notice Returns the gas used per tx
    /// @return The gas used per tx
    function gasUsedPerTx() external view returns (uint256);

    /// @notice Returns the validation status of a message
    /// @param messageId The id of the message
    /// @return status of the message
    function messageValidated(bytes32 messageId) external view returns (bool);
}

// contracts/libs/Message.sol

/**
 * @title Hyperlane Message Library
 * @notice Library for formatted messages used by Mailbox
 **/
library Message {
    using TypeCasts for bytes32;

    uint256 private constant VERSION_OFFSET = 0;
    uint256 private constant NONCE_OFFSET = 1;
    uint256 private constant ORIGIN_OFFSET = 5;
    uint256 private constant SENDER_OFFSET = 9;
    uint256 private constant DESTINATION_OFFSET = 41;
    uint256 private constant RECIPIENT_OFFSET = 45;
    uint256 private constant BODY_OFFSET = 77;

    /**
     * @notice Returns formatted (packed) Hyperlane message with provided fields
     * @dev This function should only be used in memory message construction.
     * @param _version The version of the origin and destination Mailboxes
     * @param _nonce A nonce to uniquely identify the message on its origin chain
     * @param _originDomain Domain of origin chain
     * @param _sender Address of sender as bytes32
     * @param _destinationDomain Domain of destination chain
     * @param _recipient Address of recipient on destination chain as bytes32
     * @param _messageBody Raw bytes of message body
     * @return Formatted message
     */
    function formatMessage(
        uint8 _version,
        uint32 _nonce,
        uint32 _originDomain,
        bytes32 _sender,
        uint32 _destinationDomain,
        bytes32 _recipient,
        bytes calldata _messageBody
    ) internal pure returns (bytes memory) {
        return
            abi.encodePacked(
                _version,
                _nonce,
                _originDomain,
                _sender,
                _destinationDomain,
                _recipient,
                _messageBody
            );
    }

    /**
     * @notice Returns the message ID.
     * @param _message ABI encoded Hyperlane message.
     * @return ID of `_message`
     */
    function id(bytes memory _message) internal pure returns (bytes32) {
        return keccak256(_message);
    }

    /**
     * @notice Returns the message version.
     * @param _message ABI encoded Hyperlane message.
     * @return Version of `_message`
     */
    function version(bytes calldata _message) internal pure returns (uint8) {
        return uint8(bytes1(_message[VERSION_OFFSET:NONCE_OFFSET]));
    }

    /**
     * @notice Returns the message nonce.
     * @param _message ABI encoded Hyperlane message.
     * @return Nonce of `_message`
     */
    function nonce(bytes calldata _message) internal pure returns (uint32) {
        return uint32(bytes4(_message[NONCE_OFFSET:ORIGIN_OFFSET]));
    }

    /**
     * @notice Returns the message origin domain.
     * @param _message ABI encoded Hyperlane message.
     * @return Origin domain of `_message`
     */
    function origin(bytes calldata _message) internal pure returns (uint32) {
        return uint32(bytes4(_message[ORIGIN_OFFSET:SENDER_OFFSET]));
    }

    /**
     * @notice Returns the message sender as bytes32.
     * @param _message ABI encoded Hyperlane message.
     * @return Sender of `_message` as bytes32
     */
    function sender(bytes calldata _message) internal pure returns (bytes32) {
        return bytes32(_message[SENDER_OFFSET:DESTINATION_OFFSET]);
    }

    /**
     * @notice Returns the message sender as address.
     * @param _message ABI encoded Hyperlane message.
     * @return Sender of `_message` as address
     */
    function senderAddress(
        bytes calldata _message
    ) internal pure returns (address) {
        return sender(_message).bytes32ToAddress();
    }

    /**
     * @notice Returns the message destination domain.
     * @param _message ABI encoded Hyperlane message.
     * @return Destination domain of `_message`
     */
    function destination(
        bytes calldata _message
    ) internal pure returns (uint32) {
        return uint32(bytes4(_message[DESTINATION_OFFSET:RECIPIENT_OFFSET]));
    }

    /**
     * @notice Returns the message recipient as bytes32.
     * @param _message ABI encoded Hyperlane message.
     * @return Recipient of `_message` as bytes32
     */
    function recipient(
        bytes calldata _message
    ) internal pure returns (bytes32) {
        return bytes32(_message[RECIPIENT_OFFSET:BODY_OFFSET]);
    }

    /**
     * @notice Returns the message recipient as address.
     * @param _message ABI encoded Hyperlane message.
     * @return Recipient of `_message` as address
     */
    function recipientAddress(
        bytes calldata _message
    ) internal pure returns (address) {
        return recipient(_message).bytes32ToAddress();
    }

    /**
     * @notice Returns the message body.
     * @param _message ABI encoded Hyperlane message.
     * @return Body of `_message`
     */
    function body(
        bytes calldata _message
    ) internal pure returns (bytes calldata) {
        return bytes(_message[BODY_OFFSET:]);
    }
}

// lib/openzeppelin-contracts/contracts/access/Ownable.sol

// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)

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

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

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

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

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

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

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

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

// contracts/ProtocolFeeHook.sol

/** @title ProtocolFeeHook
 * @notice This contract implements a post-dispatch hook that requires a fee
 * @author Diadata.org
 * to be paid after a message dispatch. The required fee is calculated based on
 * the current transaction gas price.
 */
contract ProtocolFeeHook is IProtocolFeeHook, Ownable, ReentrancyGuard {
    using Message for bytes;

    /// @notice Gas used per transaction, adjustable by the owner
    uint256 public gasUsedPerTx = 97440; 
    /// @notice Minimum base fee in wei, adjustable by the owner
    uint256 public minFeeWei = 1; 

    /// @notice only Message from this mailbox will be handled
    address public trustedMailBox;
    
    /// @notice Tracks if a message has been validated to prevent double processing
    mapping(bytes32 => bool) public messageValidated;

    /// @notice Enum representing different hook types
    /// @return The type of hook
    function hookType() external pure override returns (uint8) {
        return uint8(Types.PROTOCOL_FEE);
    }

   /// @notice Modifier to validate that an address is not the zero address
    modifier validateAddress(address _address) {
        if (_address == address(0)) revert InvalidAddress();
        _;
    }

    /// @notice Checks if the hook supports metadata
    /// @return True if the hook supports metadata
    function supportsMetadata(
        bytes calldata
    ) external pure override returns (bool) {
        return true;
    }

    /// @notice Ensures a message is only validated once
    modifier validateMessageOnce(bytes calldata _message) {
        bytes32 messageId = _message.id();
        if (messageValidated[messageId]) revert MessageAlreadyValidated();
        _;
        messageValidated[messageId] = true;
    }

   /**
    * @notice Handles post-dispatch logic for messages
    * @param metadata The metadata associated with the message
    * @param message The message payload
    */
    function postDispatch(
        bytes calldata metadata,
        bytes calldata message
    ) external payable override validateMessageOnce(message) {
        bytes32 messageId = message.id();
        if (msg.sender != trustedMailBox) revert UnauthorizedMailbox();

        uint256 requiredFee = quoteDispatch(metadata, message);

        if (msg.value < requiredFee) revert InsufficientFeePaid();

        emit DispatchFeePaid(requiredFee, msg.value, messageId);
    }

    /**
     * @notice Calculates the required fee for message dispatch
     * @dev Combines dynamic gas cost with fixed base fee
     * @return Total fee in wei required to process the dispatch
     */
    function quoteDispatch(
        bytes calldata,
        bytes calldata
    ) public view override returns (uint256) {
        uint256 gasPrice = tx.gasprice;
        uint256 cost = (gasUsedPerTx * gasPrice) + minFeeWei;
        return cost;
    }

 

    /** 
    * @notice Sets the gas used per tx
    * @param _gasUsedPerTx The new gas used per tx
    */
    function setGasUsedPerTx(uint256 _gasUsedPerTx) external onlyOwner {
        emit GasUsedPerTxUpdated(gasUsedPerTx, _gasUsedPerTx);
        gasUsedPerTx = _gasUsedPerTx;
    }

    /**
     * @notice Withdraws accumulated fees to a specified recipient
     * @param feeRecipient The address to receive the withdrawn fees
     * @param amount The amount of fees to withdraw
     */
    function withdrawFees(address feeRecipient, uint256 amount) external onlyOwner nonReentrant {
        if (feeRecipient == address(0)) revert InvalidFeeRecipient();
        uint256 balance = address(this).balance;
        if (balance == 0) revert NoBalanceToWithdraw();
        if (amount > balance) revert InsufficientBalance();  

        emit FeesWithdrawn(feeRecipient, amount);

        (bool success, ) = payable(feeRecipient).call{ value: amount }("");
        if (!success) revert FeeTransferFailed();
    }

    /** 
     * @notice Sets the trusted mailbox address
     * @param _mailbox The new trusted mailbox address
     */
    function setTrustedMailBox(
        address _mailbox
    ) external onlyOwner validateAddress(_mailbox) {
        emit TrustedMailBoxUpdated(trustedMailBox, _mailbox);
        trustedMailBox = _mailbox;
    }

    /** 
     * @notice Sets the minimum base fee in wei
     * @param _minFeeWei The new minimum fee in wei
     */
    function setMinFeeWei(uint256 _minFeeWei) external onlyOwner {
        emit MinFeeWeiUpdated(minFeeWei, _minFeeWei);
        minFeeWei = _minFeeWei;
    }

    /// @notice Allows the contract to receive ether
    receive() external payable {}

    /// @notice Fallback function to receive ether
    fallback() external payable {}
}

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

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[{"inputs":[],"name":"FeeTransferFailed","type":"error"},{"inputs":[],"name":"InsufficientBalance","type":"error"},{"inputs":[],"name":"InsufficientFeePaid","type":"error"},{"inputs":[],"name":"InvalidAddress","type":"error"},{"inputs":[],"name":"InvalidFeeRecipient","type":"error"},{"inputs":[],"name":"MessageAlreadyValidated","type":"error"},{"inputs":[],"name":"NoBalanceToWithdraw","type":"error"},{"inputs":[],"name":"UnauthorizedMailbox","type":"error"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"requiredFee","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"actualFee","type":"uint256"},{"indexed":false,"internalType":"bytes32","name":"messageId","type":"bytes32"}],"name":"DispatchFeePaid","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"feeRecipient","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"FeesWithdrawn","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"previousGasUsed","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"newGasUsed","type":"uint256"}],"name":"GasUsedPerTxUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"previousMinFee","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"newMinFee","type":"uint256"}],"name":"MinFeeWeiUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousMailBox","type":"address"},{"indexed":true,"internalType":"address","name":"newMailBox","type":"address"}],"name":"TrustedMailBoxUpdated","type":"event"},{"stateMutability":"payable","type":"fallback"},{"inputs":[],"name":"gasUsedPerTx","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"hookType","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"name":"messageValidated","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"minFeeWei","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes","name":"metadata","type":"bytes"},{"internalType":"bytes","name":"message","type":"bytes"}],"name":"postDispatch","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"bytes","name":"","type":"bytes"},{"internalType":"bytes","name":"","type":"bytes"}],"name":"quoteDispatch","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_gasUsedPerTx","type":"uint256"}],"name":"setGasUsedPerTx","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_minFeeWei","type":"uint256"}],"name":"setMinFeeWei","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_mailbox","type":"address"}],"name":"setTrustedMailBox","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes","name":"","type":"bytes"}],"name":"supportsMetadata","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"trustedMailBox","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"feeRecipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"withdrawFees","outputs":[],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]

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