From d743f2ce9656c3ef1a1ba04ec9edfd8566334529 Mon Sep 17 00:00:00 2001
From: Xi Lin <zimpha@gmail.com>
Date: Tue, 30 May 2023 08:31:12 +0800
Subject: [PATCH] feat(contracts): add fallback contract to deployed in L2
 (#522)

Co-authored-by: HAOYUatHZ <37070449+HAOYUatHZ@users.noreply.github.com>
---
 contracts/src/misc/Fallback.sol | 36 +++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 contracts/src/misc/Fallback.sol

diff --git a/contracts/src/misc/Fallback.sol b/contracts/src/misc/Fallback.sol
new file mode 100644
index 000000000..1adc363eb
--- /dev/null
+++ b/contracts/src/misc/Fallback.sol
@@ -0,0 +1,36 @@
+// SPDX-License-Identifier: MIT
+
+pragma solidity ^0.8.0;
+
+import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
+import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
+import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
+
+contract Fallback is Ownable {
+    using SafeERC20 for IERC20;
+
+    /// @notice Withdraw stucked token from this contract.
+    /// @param _token The address of token to withdraw, use `address(0)` if withdraw ETH.
+    /// @param _amount The amount of token to withdraw.
+    /// @param _recipient The address of receiver.
+    function withdraw(
+        address _token,
+        uint256 _amount,
+        address _recipient
+    ) external onlyOwner {
+        if (_token == address(0)) {
+            (bool _success, ) = _recipient.call{value: _amount}("");
+            require(_success, "transfer ETH failed");
+        } else {
+            IERC20(_token).safeTransfer(_recipient, _amount);
+        }
+    }
+
+    /// @notice Execute an arbitrary message.
+    /// @param _target The address of contract to call.
+    /// @param _data The calldata passed to target contract.
+    function execute(address _target, bytes calldata _data) external payable onlyOwner {
+        (bool _success, ) = _target.call{value: msg.value}(_data);
+        require(_success, "call failed");
+    }
+}