DenialFactory.sol

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.10;

import '../BaseLevel.sol';
import './Denial.sol';

contract DenialFactory is Level {

  uint public initialDeposit = 0.001 ether;

  function createInstance(address _player) override public payable returns (address) {
    _player;
    require(msg.value >= initialDeposit);
    Denial instance = new Denial();
    (bool result,) = address(instance).call{value:msg.value}("");
    require(result);
    return address(instance);
  }

  function validateInstance(address payable _instance, address _player) override public returns (bool) {
    _player;
    Denial instance = Denial(_instance);
    if (address(instance).balance <= 100 wei) { // cheating otherwise
        return false;
    }
    // fix the gas limit for this call
    (bool result,) = address(instance).call{gas:1000000}(abi.encodeWithSignature("withdraw()")); // Must revert
    return !result;
  }

  receive() external payable {}

}