Add deserializing constructors to CTransaction and CMutableTransaction

src/primitives/transaction.h

@@ -366,6 +366,7 @@ public:
 
     /** Convert a CMutableTransaction into a CTransaction. */
     CTransaction(const CMutableTransaction &tx);
+    CTransaction(CMutableTransaction &&tx);
 
     CTransaction& operator=(const CTransaction& tx);
 
@@ -411,6 +412,9 @@ public:
             UpdateHash();
     }
 
+    template <typename Stream>
+    CTransaction(deserialize_type, Stream& s) : CTransaction(CMutableTransaction(deserialize, s)) {}
+
     bool IsNull() const {
         return vin.empty() && vout.empty();
     }
@@ -523,6 +527,11 @@ struct CMutableTransaction
         }
     }
 
+    template <typename Stream>
+    CMutableTransaction(deserialize_type, Stream& s) {
+        Unserialize(s);
+    }
+
     /** Compute the hash of this CMutableTransaction. This is computed on the
      * fly, as opposed to GetHash() in CTransaction, which uses a cached result.
      */