2022-05-16 HSNL Paper Meeting

Example1.sol

// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.13;

contract A {
    uint256 public x;

    function foo() public payable {
        x++;
    }

    function bar() public {
        selfdestruct(payable(msg.sender));
    }
}

contract B {
    uint256 public x;

    function foo() public payable {
        x++;
    }

    function bar(address c) public {
        (bool success, ) = c.delegatecall(abi.encodeWithSignature("bar()"));
        require(success);
    }
}

This contract has not been audited, so please be careful when you try to use it.