chainntfns/btcdnotify: log error when unable to query for transaction

chainntnfs/btcdnotify/btcd.go

@@ -406,6 +406,10 @@ func (b *BtcdNotifier) attemptHistoricalDispatch(msg *confirmationsNotification,
 	// then we may be able to dispatch it immediately.
 	tx, err := b.chainConn.GetRawTransactionVerbose(msg.txid)
 	if err != nil || tx == nil || tx.BlockHash == "" {
+		if err != nil {
+			chainntnfs.Log.Errorf("unable to query for txid(%v): %v",
+				msg.txid, err)
+		}
 		return false
 	}