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

import { Predeploys } from "../libraries/Predeploys.sol";
import { L2CrossDomainMessenger } from "./L2CrossDomainMessenger.sol";
import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol";

/**
 * @title CrossDomainOwnable2
 * @notice This contract extends the OpenZeppelin `Ownable` contract for L2 contracts to be owned
 *         by contracts on L1. Note that this contract is meant to be used with systems that use
 *         the CrossDomainMessenger system. It will not work if the OptimismPortal is used
 *         directly.
 */
abstract contract CrossDomainOwnable2 is Ownable {
    /**
     * @notice Overrides the implementation of the `onlyOwner` modifier to check that the unaliased
     *         `xDomainMessageSender` is the owner of the contract. This value is set to the caller
     *         of the L1CrossDomainMessenger.
     */
    function _checkOwner() internal view override {
        L2CrossDomainMessenger messenger = L2CrossDomainMessenger(
            Predeploys.L2_CROSS_DOMAIN_MESSENGER
        );

        require(
            msg.sender == address(messenger),
            "CrossDomainOwnable2: caller is not the messenger"
        );

        require(
            owner() == messenger.xDomainMessageSender(),
            "CrossDomainOwnable2: caller is not the owner"
        );
    }
}