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/**
 *Submitted for verification at KatanaScan.com on 2025-11-26
*/

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

interface IERC20 {
    function transfer(address recipient, uint256 amount) external returns (bool);
    function balanceOf(address account) external view returns (uint256);
}

interface IERC721 {
    function safeTransferFrom(address from, address to, uint256 tokenId) external;
}

contract GasBackResponder {
    address immutable public owner;

    constructor() {
        owner = msg.sender;
    }

    function trigger() external payable {
        require(msg.value > 0, "Must send gas to trigger");
        (bool success, ) = msg.sender.call{value: msg.value, gas: 50000}("");
        require(success, "Response TX failed");
    }

    function recoverETH() external {
        require(msg.sender == owner, "Not owner");
        (bool success, ) = owner.call{value: address(this).balance}("");
        require(success, "Withdraw failed");
    }

    function recoverERC20(address token) external {
        require(msg.sender == owner, "Not owner");
        IERC20 tokenContract = IERC20(token);
        tokenContract.transfer(owner, tokenContract.balanceOf(address(this)));
    }

    function recoverERC721(address nft, uint256 tokenId) external {
        require(msg.sender == owner, "Not owner");
        IERC721(nft).safeTransferFrom(address(this), owner, tokenId);
    }

    receive() external payable {}
}

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[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"}],"name":"recoverERC20","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"nft","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"recoverERC721","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"recoverETH","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"trigger","outputs":[],"stateMutability":"payable","type":"function"},{"stateMutability":"payable","type":"receive"}]

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ipfs://e82c845db5a083f7cf14a3627dfc0d3128fa83a88ba6a4af83406d2b1f04efc3