smartbugs-curated/dataset/other/crypto_roulette.sol

62 lines
1.7 KiB
Solidity

/*
* @source: https://github.com/thec00n/smart-contract-honeypots/blob/master/CryptoRoulette.sol
* @vulnerable_at_lines: 40,41,42
*/
pragma solidity ^0.4.19;
// CryptoRoulette
//
// Guess the number secretly stored in the blockchain and win the whole contract balance!
// A new number is randomly chosen after each try.
// https://www.reddit.com/r/ethdev/comments/7wp363/how_does_this_honeypot_work_it_seems_like_a/
// To play, call the play() method with the guessed number (1-20). Bet price: 0.1 ether
contract CryptoRoulette {
uint256 private secretNumber;
uint256 public lastPlayed;
uint256 public betPrice = 0.1 ether;
address public ownerAddr;
struct Game {
address player;
uint256 number;
}
Game[] public gamesPlayed;
function CryptoRoulette() public {
ownerAddr = msg.sender;
shuffle();
}
function shuffle() internal {
// randomly set secretNumber with a value between 1 and 20
secretNumber = uint8(sha3(now, block.blockhash(block.number-1))) % 20 + 1;
}
function play(uint256 number) payable public {
require(msg.value >= betPrice && number <= 10);
// <yes> <report> OTHER - uninitialized storage
Game game; //Uninitialized storage pointer
game.player = msg.sender;
game.number = number;
gamesPlayed.push(game);
if (number == secretNumber) {
// win!
msg.sender.transfer(this.balance);
}
shuffle();
lastPlayed = now;
}
function kill() public {
if (msg.sender == ownerAddr && now > lastPlayed + 1 days) {
suicide(msg.sender);
}
}
function() public payable { }
}