hyperlane-monorepo/solidity/contracts/mock/MockCircleMessageTransmitter.sol

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.13;

import {ICircleMessageTransmitter} from "../middleware/liquidity-layer/interfaces/circle/ICircleMessageTransmitter.sol";
import {MockToken} from "./MockToken.sol";

contract MockCircleMessageTransmitter is ICircleMessageTransmitter {
    mapping(bytes32 => bool) processedNonces;
    MockToken token;

    constructor(MockToken _token) {
        token = _token;
    }

    function receiveMessage(
        bytes memory,
        bytes calldata
    ) external pure returns (bool success) {
        success = true;
    }

    function hashSourceAndNonce(
        uint32 _source,
        uint64 _nonce
    ) public pure returns (bytes32) {
        return keccak256(abi.encodePacked(_source, _nonce));
    }

    function process(
        bytes32 _nonceId,
        address _recipient,
        uint256 _amount
    ) public {
        processedNonces[_nonceId] = true;
        token.mint(_recipient, _amount);
    }

    function usedNonces(bytes32 _nonceId) external view returns (bool) {
        return processedNonces[_nonceId];
    }
}