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

import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol";
import { AddressAliasHelper } from "../vendor/AddressAliasHelper.sol";

/**
 * @title CrossDomainOwnable
 * @notice This contract extends the OpenZeppelin `Ownable` contract for L2 contracts to be owned
 *         by contracts on L1. Note that this contract is only safe to be used if the
 *         CrossDomainMessenger system is bypassed and the caller on L1 is calling the
 *         OptimismPortal directly.
 */
abstract contract CrossDomainOwnable is Ownable {
    /**
     * @notice Overrides the implementation of the `onlyOwner` modifier to check that the unaliased
     *         `msg.sender` is the owner of the contract.
     */
    function _checkOwner() internal view override {
        require(
            owner() == AddressAliasHelper.undoL1ToL2Alias(msg.sender),
            "CrossDomainOwnable: caller is not the owner"
        );
    }
}