1 files changed, 31 insertions, 0 deletions
diff --git a/packages/contracts/src/current/test/MaliciousToken/MaliciousToken.sol b/packages/contracts/src/current/test/MaliciousToken/MaliciousToken.sol
new file mode 100644
index 000000000..9e502616c
--- /dev/null
+++ b/packages/contracts/src/current/test/MaliciousToken/MaliciousToken.sol
@@ -0,0 +1,31 @@
+pragma solidity ^0.4.18;
+
+import { ERC20Token } from "../../tokens/ERC20Token/ERC20Token.sol";
+
+contract MaliciousToken is ERC20Token {
+    uint8 stateToUpdate = 1;  // Not null so that change only requires 5000 gas
+
+    function updateState()
+        internal
+    {
+        stateToUpdate++;
+    }
+
+    function balanceOf(address _owner)
+        public
+        constant
+        returns (uint)
+    {
+        updateState();
+        return balances[_owner];
+    }
+
+    function allowance(address _owner, address _spender)
+        public
+        constant
+        returns (uint)
+    {
+        updateState();
+        return allowed[_owner][_spender];
+    }
+}