pragma solidity 0.7.6;

interface Messenger {
    function sendMessage(address _target, bytes memory _message, uint32 _gasLimit) external;

    function relayMessage(
        address _target,
        address _sender,
        bytes memory _message,
        uint256 _messageNonce
    ) external;

    function xDomainMessageSender() external view returns (address);
}

// L2 Contract which receives messages from a specific L1 address and transparently
// forwards them to the destination.
// 
// Any other L2 contract which uses this contract's address as a privileged position,
// can be considered to be owned by the `l1Owner`
contract CrossChainAccount {
    Messenger messenger;
    address l1Owner;

    constructor(Messenger _messenger, address _l1Owner) {
        messenger = _messenger;
        l1Owner = _l1Owner;
    }

    // `forward` `calls` the `target` with `data`, 
    // can only be called by the `messenger`
    // can only be called if `tx.l1MessageSender == l1Owner`
    function forward(address target, bytes memory data) external {
        // 1. The call MUST come from the L1 Messenger
        require(msg.sender == address(messenger), "Sender is not the messenger");
        // 2. The L1 Messenger's caller MUST be the L1 Owner
        require(messenger.xDomainMessageSender() == l1Owner, "L1Sender is not the L1Owner");
        // 3. Make the external call
        (bool success, bytes memory res) = target.call(data);
        require(success, string(abi.encode("XChain call failed:", res)));
    }
}

{
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"contract Messenger","name":"_messenger","type":"address"},{"internalType":"address","name":"_l1Owner","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[{"internalType":"address","name":"target","type":"address"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"forward","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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