Add option to return non-segwit serialization via rpc

src/rpc/blockchain.cpp

@@ -486,7 +486,7 @@ UniValue getblock(const UniValue& params, bool fHelp)
 
     if (!fVerbose)
     {
-        CDataStream ssBlock(SER_NETWORK, PROTOCOL_VERSION);
+        CDataStream ssBlock(SER_NETWORK, PROTOCOL_VERSION | RPCSerializationFlags());
         ssBlock << block;
         std::string strHex = HexStr(ssBlock.begin(), ssBlock.end());
         return strHex;

src/rpc/rawtransaction.cpp

@@ -197,7 +197,7 @@ UniValue getrawtransaction(const UniValue& params, bool fHelp)
     if (!GetTransaction(hash, tx, Params().GetConsensus(), hashBlock, true))
         throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "No information available about transaction");
 
-    string strHex = EncodeHexTx(tx);
+    string strHex = EncodeHexTx(tx, RPCSerializationFlags());
 
     if (!fVerbose)
         return strHex;

src/rpc/server.cpp

@@ -523,4 +523,9 @@ void RPCRunLater(const std::string& name, boost::function<void(void)> func, int6
     deadlineTimers.insert(std::make_pair(name, std::shared_ptr<RPCTimerBase>(timerInterface->NewTimer(func, nSeconds*1000))));
 }
 
+int RPCSerializationFlags()
+{
+    return 0;
+}
+
 CRPCTable tableRPC;

src/rpc/server.h

@@ -19,6 +19,8 @@
 
 #include <univalue.h>
 
+static const unsigned int DEFAULT_RPC_SERIALIZE_VERSION = 1;
+
 class CRPCCommand;
 
 namespace RPCServer
@@ -196,4 +198,7 @@ void InterruptRPC();
 void StopRPC();
 std::string JSONRPCExecBatch(const UniValue& vReq);
 
+// Retrieves any serialization flags requested in command line argument
+int RPCSerializationFlags();
+
 #endif // BITCOIN_RPCSERVER_H