Elevator

Goal

Make the Elevator report that it has reached the top floor.

Your task

Read Elevator.sol, then complete Exploit.s.sol.

:~/targets/ethernaut-elevator$

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface Building {
    function isLastFloor(uint256) external returns (bool);
}

contract Elevator {
    bool public top;
    uint256 public floor;

    function goTo(uint256 _floor) public {
        Building building = Building(msg.sender);
        if (!building.isLastFloor(_floor)) {
            floor = _floor;
            top = building.isLastFloor(floor);
        }
    }
}

Starter exploit

Exploit.s.sol

Read-only

// Already wired up for you - do NOT add imports or a contract wrapper:
//   elevatorInstance -> the deployed Elevator contract
//   PLAYER_PRIVATE_KEY / PLAYER_ADDRESS -> your key and address
// Write only the code below.

contract HelperContract {
    // TODO: implement the exploit.
}

function run() external {
    vm.startBroadcast(PLAYER_PRIVATE_KEY);

    // TODO: implement the exploit.

    vm.stopBroadcast();
}

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Elevator

Goal

Your task

Elevator

Exploit.s.sol

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