// SPDX-License-Identifier: MIT
pragma solidity >0.5.0 <0.8.0;
pragma experimental ABIEncoderV2;

/* Library Imports */
import { Lib_RLPReader } from "../rlp/Lib_RLPReader.sol";

/**
 * @title Lib_CrossDomainUtils
 */
library Lib_CrossDomainUtils {
    /**
     * Generates the correct cross domain calldata for a message.
     * @param _target Target contract address.
     * @param _sender Message sender address.
     * @param _message Message to send to the target.
     * @param _messageNonce Nonce for the provided message.
     * @return ABI encoded cross domain calldata.
     */
    function encodeXDomainCalldata(
        address _target,
        address _sender,
        bytes memory _message,
        uint256 _messageNonce
    )
        internal
        pure
        returns (
            bytes memory
        )
    {
        return abi.encodeWithSignature(
            "relayMessage(address,address,bytes,uint256)",
            _target,
            _sender,
            _message,
            _messageNonce
        );
    }
}
