log a notification to help debug user issues

rpc/lib/server/handlers.go

@@ -116,6 +116,7 @@ func makeJSONRPCHandler(funcMap map[string]*RPCFunc, logger log.Logger) http.Han
 		// A Notification is a Request object without an "id" member.
 		// The Server MUST NOT reply to a Notification, including those that are within a batch request.
 		if request.ID == "" {
+			logger.Debug("HTTPJSONRPC received a notification, skipping... (please send a non-empty ID if you want to call a method)")
 			return
 		}
 		if len(r.URL.Path) > 1 {
@@ -521,6 +522,7 @@ func (wsc *wsConnection) readRoutine() {
 			// A Notification is a Request object without an "id" member.
 			// The Server MUST NOT reply to a Notification, including those that are within a batch request.
 			if request.ID == "" {
+				wsc.Logger.Debug("WSJSONRPC received a notification, skipping... (please send a non-empty ID if you want to call a method)")
 				continue
 			}