modifier onlyL1Counterpart() {
        require(
            msg.sender == AddressAliasHelper.applyL1ToL2Alias(l1Counterpart),
            "ONLY_COUNTERPART_GATEWAY"
        );
        _;
    }
uint160 constant offset = uint160(0x1111000000000000000000000000000000001111);

    /// @notice Utility function that converts the address in the L1 that submitted a tx to
    
    
    /// @return l2Address L2 address as viewed in msg.sender
    function applyL1ToL2Alias(address l1Address) internal pure returns (address l2Address) {
        l2Address = address(uint160(l1Address) + offset);
    }
