1 files changed, 29 insertions, 0 deletions
diff --git a/packages/contracts/contracts/test/MaliciousToken.sol b/packages/contracts/contracts/test/MaliciousToken.sol
new file mode 100644
index 000000000..3c1a53612
--- /dev/null
+++ b/packages/contracts/contracts/test/MaliciousToken.sol
@@ -0,0 +1,29 @@
+pragma solidity 0.4.11;
+
+import "./../base/StandardToken.sol";
+
+contract MaliciousToken is StandardToken {
+    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];
+    }
+}