fix 0 transaction in broadcast

noble/broadcast.go

@@ -61,12 +61,13 @@ func (n *Noble) Broadcast(
 
 	// sign and broadcast txn
 	for attempt := 0; attempt <= n.maxRetries; attempt++ {
-		if err := n.attemptBroadcast(ctx, logger, msgs, sequenceMap, sdkContext, txBuilder); err == nil {
+		err := n.attemptBroadcast(ctx, logger, msgs, sequenceMap, sdkContext, txBuilder)
+		if err == nil {
 			return nil
 		}
 
 		// Log retry information
-		logger.Info(fmt.Sprintf("Retrying in %d seconds", n.retryIntervalSeconds))
+		logger.Error("Broadcasting to noble failed. Retrying...", "error", err, "interval_seconds", n.retryIntervalSeconds)
 		time.Sleep(time.Duration(n.retryIntervalSeconds) * time.Second)
 	}
 
@@ -120,6 +121,10 @@ func (n *Noble) attemptBroadcast(
 			msg.SourceTxHash))
 	}
 
+	if len(receiveMsgs) == 0 {
+		return nil
+	}
+
 	if err := txBuilder.SetMsgs(receiveMsgs...); err != nil {
 		return fmt.Errorf("failed to set messages on tx: %w", err)
 	}

noble/listener.go

@@ -94,7 +94,7 @@ func (n *Noble) StartListener(
 				default:
 					block := <-blockQueue
 					res, err := n.cc.RPCClient.TxSearch(ctx, fmt.Sprintf("tx.height=%d", block), false, nil, nil, "")
-					if err != nil {
+					if err != nil || res == nil {
 						logger.Debug(fmt.Sprintf("unable to query Noble block %d", block), "error:", err)
 						blockQueue <- block
 					}