1 files changed, 12 insertions, 2 deletions
diff --git a/src/script/interpreter.h b/src/script/interpreter.h
index 8bf379ed89..063a072368 100644
--- a/src/script/interpreter.h
+++ b/src/script/interpreter.h
@@ -7,6 +7,7 @@
 #define BITCOIN_SCRIPT_INTERPRETER_H
 
 #include "script_error.h"
+#include "primitives/transaction.h"
 
 #include <vector>
 #include <stdint.h>
@@ -90,7 +91,7 @@ public:
     virtual ~BaseSignatureChecker() {}
 };
 
-class SignatureChecker : public BaseSignatureChecker
+class TransactionSignatureChecker : public BaseSignatureChecker
 {
 private:
     const CTransaction& txTo;
@@ -100,10 +101,19 @@ protected:
     virtual bool VerifySignature(const std::vector<unsigned char>& vchSig, const CPubKey& vchPubKey, const uint256& sighash) const;
 
 public:
-    SignatureChecker(const CTransaction& txToIn, unsigned int nInIn) : txTo(txToIn), nIn(nInIn) {}
+    TransactionSignatureChecker(const CTransaction& txToIn, unsigned int nInIn) : txTo(txToIn), nIn(nInIn) {}
     bool CheckSig(const std::vector<unsigned char>& scriptSig, const std::vector<unsigned char>& vchPubKey, const CScript& scriptCode) const;
 };
 
+class MutableTransactionSignatureChecker : public TransactionSignatureChecker
+{
+private:
+    const CTransaction txTo;
+
+public:
+    MutableTransactionSignatureChecker(const CMutableTransaction& txToIn, unsigned int nInIn) : TransactionSignatureChecker(txTo, nInIn), txTo(txToIn) {}
+};
+
 bool EvalScript(std::vector<std::vector<unsigned char> >& stack, const CScript& script, unsigned int flags, const BaseSignatureChecker& checker, ScriptError* error = NULL);
 bool VerifyScript(const CScript& scriptSig, const CScript& scriptPubKey, unsigned int flags, const BaseSignatureChecker& checker, ScriptError* error = NULL);