diff --git a/lib/models/history.dart b/lib/models/history.dart
index 4a28d04..ef9076f 100644
--- a/lib/models/history.dart
+++ b/lib/models/history.dart
@@ -8,14 +8,13 @@ import 'dart:math';
 import 'package:intl/intl.dart';
 
 class HistoryProvider with ChangeNotifier {
+  // String pubkey = 'D2meevcAHFTS2gQMvmRW5Hzi25jDdikk4nC4u1FkwRaU'; // For debug
   String pubkey = '';
   HistoryProvider(this.pubkey);
   final TextEditingController _outputPubkey = new TextEditingController();
   bool isTheEnd = false;
   List transBC;
 
-  // String pubkey = 'D2meevcAHFTS2gQMvmRW5Hzi25jDdikk4nC4u1FkwRaU'; // For debug
-
   Future scan() async {
     await Permission.camera.request();
     String barcode;
@@ -104,8 +103,6 @@ class HistoryProvider with ChangeNotifier {
 
       i++;
     }
-
-    // transBC.sort((b, a) => Comparable.compare(a[0], b[0]));
     return transBC;
   }