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openzeppelin-contracts/contracts/Bounty.sol

36 lines
844 B

import './PullPaymentCapable.sol';
import './Token.sol';
/*
* Bounty
* This bounty will pay out if you can cause a Token's balance
* to be lower than its totalSupply, which would mean that it doesn't
* have sufficient ether for everyone to withdraw.
*/
contract Bounty is PullPaymentCapable {
bool public claimed;
mapping(address => address) public researchers;
function() {
if (claimed) throw;
}
function createTarget() returns(Token) {
Token target = new Token(0);
researchers[target] = msg.sender;
return target;
}
function claim(Token target) {
address researcher = researchers[target];
if (researcher == 0) throw;
// check Token contract invariants
if (target.totalSupply() == target.balance) {
throw;
}
asyncSend(researcher, this.balance);
claimed = true;
}
}