Ethernaut Fallout with Solidity 0.5

Security Ethernaut
4

Hi @paulinablaszk

I updated to use the current OpenZeppelin Ownable, rather than having to use a Legacy version. This now passes the test.

Fallout.sol

pragma solidity ^0.5.0;

import 'openzeppelin-solidity/contracts/math/SafeMath.sol';
import 'openzeppelin-solidity/contracts/ownership/Ownable.sol';
contract Fallout is Ownable {
  
  using SafeMath for uint256;
  mapping (address => uint) allocations;

  /* constructor */
  function Fal1out() public payable {
    transferOwnership(msg.sender);
    allocations[owner()] = msg.value;
  }

  function allocate() public payable {
    allocations[msg.sender] = allocations[msg.sender].add(msg.value);
  }

  function sendAllocation(address payable allocator) public {
    require(allocations[allocator] > 0);
    allocator.transfer(allocations[allocator]);
  }

  function collectAllocations() public onlyOwner {
    msg.sender.transfer(address(this).balance);
  }

  function allocatorBalance(address allocator) public view returns (uint) {
    return allocations[allocator];
  }
}
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