Contract's recover Weth function not working properly.

[jamil-wittmann]

Contract's recover Weth function not working properly.

[praveenbm5]

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.15;

import {IWETH} from "../interfaces/IWETH.sol";

import "forge-std/Script.sol";
import "forge-std/console.sol";

contract RecoverWeth is Script {

    IWETH weth = IWETH(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2);

    address sandwich;
    address admin;
    address helper;
    
    // serachers
    function setUp() public {
        //change this
        sandwich = 0x0000000000000000000000000000000000000000;
    }
    
    function run() public view {
        console.log(address(sandwich));

        uint256 sandwichBalanceBefore = weth.balanceOf(sandwich);
        console.log("Sandwich Balance: %s", sandwichBalanceBefore);

        //string memory functionName = "recoverWeth"; //0x42 or 66
        bytes memory payload = abi.encodePacked(
            uint8(66),
            sandwichBalanceBefore
        );
        console.log("Payload: ");
        console.logBytes(payload);
    }
}

//save this file to "contract/script" folder and run the following commands from "contract" folder
//forge script ./script/RecoverWeth.s.sol --rpc-url http://127.0.0.1:8545
//get the payload hex from the logs 
//cast send --rpc-url http://127.0.0.1:8545 --private-key <xxxx> <sandwich address> <payload hex>

[jamil-wittmann]

Solved.

The recover_weth function takes in an input that dictates the amt of weth to withdraw, if this value isn't passed then it will just try withdrawing 0. so in this case to recover 0.005 weth, you first convert 0.005 weth to wei and then convert the wei value to hex. This means that the calldata to recover ur weth will be equal to

0x420000000000000000000000000000000000000000000000000011C37937E08000

[0xsepu]

@jamil-wittmann Do you mind posting the exact command you used ? I am having issues recovering.