Begin supporting utf8: in z_sendmany opreturn

src/wallet/rpcwallet.cpp

@@ -5156,6 +5156,11 @@ UniValue z_sendmany(const UniValue& params, bool fHelp, const CPubKey& mypk)
     UniValue opretValue;
     if(params.size() == 5) {
         opretValue = params[4].get_str();
+
+        if(opretValue.get_str().substr(0,5) == "utf8:") {
+            // TODO: 1) remove the first 5 chars
+            //       2) convert remaining text to hex and store in opretValue
+        }
     }
 
     bool containsSaplingOutput = false;