openzeppelin-contracts/contracts/vendor/amb/IAMB.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface IAMB {
    event UserRequestForAffirmation(bytes32 indexed messageId, bytes encodedData);
    event UserRequestForSignature(bytes32 indexed messageId, bytes encodedData);
    event AffirmationCompleted(
        address indexed sender,
        address indexed executor,
        bytes32 indexed messageId,
        bool status
    );
    event RelayedMessage(address indexed sender, address indexed executor, bytes32 indexed messageId, bool status);

    function messageSender() external view returns (address);

    function maxGasPerTx() external view returns (uint256);

    function transactionHash() external view returns (bytes32);

    function messageId() external view returns (bytes32);

    function messageSourceChainId() external view returns (bytes32);

    function messageCallStatus(bytes32 _messageId) external view returns (bool);

    function failedMessageDataHash(bytes32 _messageId) external view returns (bytes32);

    function failedMessageReceiver(bytes32 _messageId) external view returns (address);

    function failedMessageSender(bytes32 _messageId) external view returns (address);

    function requireToPassMessage(
        address _contract,
        bytes calldata _data,
        uint256 _gas
    ) external returns (bytes32);

    function requireToConfirmMessage(
        address _contract,
        bytes calldata _data,
        uint256 _gas
    ) external returns (bytes32);

    function sourceChainId() external view returns (uint256);

    function destinationChainId() external view returns (uint256);
}