From 857e37e03221f483ca4adef1fb8cca9d157795d2 Mon Sep 17 00:00:00 2001
From: Manuel Araoz <manuelaraoz@gmail.com>
Date: Thu, 11 Aug 2016 16:29:10 -0300
Subject: [PATCH] Bounty contract

---
 contracts/Bounty.sol             | 41 ++++++++++++++++++++++++++++++++
 migrations/2_deploy_contracts.js |  1 +
 2 files changed, 42 insertions(+)
 create mode 100644 contracts/Bounty.sol

diff --git a/contracts/Bounty.sol b/contracts/Bounty.sol
new file mode 100644
index 000000000..ad7a765f3
--- /dev/null
+++ b/contracts/Bounty.sol
@@ -0,0 +1,41 @@
+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;
+  }
+
+}
diff --git a/migrations/2_deploy_contracts.js b/migrations/2_deploy_contracts.js
index 02476c063..1cb418de3 100644
--- a/migrations/2_deploy_contracts.js
+++ b/migrations/2_deploy_contracts.js
@@ -3,4 +3,5 @@ module.exports = function(deployer) {
   deployer.deploy(GoodFailEarly);
   deployer.deploy(PullPaymentBid);
   deployer.deploy(BadArrayUse);
+  deployer.deploy(Bounty);
 };