mock up DisputePayout

src/cc/eval.h

@@ -14,5 +14,36 @@ bool EvalConditionValidity(const CC *cond, const CTransaction *tx, int nIn);
  */
 bool CheckImportPayout(const CC *cond, const CTransaction *payoutTx, int nIn);
 
+/*
+ * Virtual machine to use in the case of on-chain app evaluation
+ */
+class AppVM
+{ 
+public:
+    /*
+     * in:  header   - paramters agreed upon by all players
+     * in:  body     - gamestate
+     * out: length   - length of game (longest wins)
+     * out: payments - vector of CTxOut, always deterministically sorted.
+     */
+    virtual std::pair<int,std::vector<CTxOut>>
+        evaluate(std::vector<unsigned char> header, std::vector<unsigned char> body) = 0;
+};
+
+/*
+ * Test a DisputePayout CC Eval condition, using a provided AppVM
+ */
+bool DisputePayout(AppVM &vm, const CC *cond, const CTransaction *disputeTx, int nIn);
+
+/*
+ * Get PUSHDATA from a script
+ */
+bool GetPushData(const CScript &sig, std::vector<unsigned char> &data);
+
+/*
+ * Get OP_RETURN data from a script
+ */
+bool GetOpReturnData(const CScript &sig, std::vector<unsigned char> &data);
+
 
 #endif /* CC_EVAL_H */