CW-898 fix fast scanner

lib/entities/qr_scanner.dart

@@ -23,7 +23,7 @@ Future<String> presentQRScanner(BuildContext context) async {
       ),
     );
     isQrScannerShown = false;
-    return result??'';
+    return result!;
   } catch (e) {
     isQrScannerShown = false;
     rethrow;
@@ -95,9 +95,7 @@ class _BarcodeScannerSimpleState extends State<BarcodeScannerSimple> {
         setState(() {
           popped = true;
         });
-        SchedulerBinding.instance.addPostFrameCallback((_) {
-          Navigator.of(context).pop(_barcode?.rawValue ?? "");
-        });
+        Navigator.of(context).pop(_barcode!.rawValue ?? _barcode!.rawBytes);
       }
     }
   }

lib/view_model/node_list/node_create_or_edit_view_model.dart

@@ -1,6 +1,7 @@
 import 'package:cake_wallet/core/execution_state.dart';
 import 'package:cake_wallet/entities/qr_scanner.dart';
 import 'package:cake_wallet/store/settings_store.dart';
+import 'package:cw_core/utils/print_verbose.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:hive/hive.dart';
 import 'package:mobx/mobx.dart';
@@ -214,29 +215,26 @@ abstract class NodeCreateOrEditViewModelBase with Store {
           await PermissionHandler.checkPermission(Permission.camera, context);
       if (!isCameraPermissionGranted) return;
       String code = await presentQRScanner(context);
-
       if (code.isEmpty) {
         throw Exception('Unexpected scan QR code value: value is empty');
       }
 
-      final uri = Uri.tryParse(code);
-
-      if (uri == null) {
-        throw Exception('Unexpected scan QR code value: Value is invalid');
-      }
+      final uri = Uri.parse(code);
 
       final userInfo = uri.userInfo.split(':');
 
       if (userInfo.length < 2) {
         throw Exception('Unexpected scan QR code value: Value is invalid');
       }
 
-      final rpcUser = userInfo[0];
-      final rpcPassword = userInfo[1];
+      final rpcUser = userInfo.length == 2 ? userInfo[0] : '';
+      final rpcPassword = userInfo.length == 2 ? userInfo[1] : '';
       final ipAddress = uri.host;
       final port = uri.port.toString();
       final path = uri.path;
 
+      await Future.delayed(Duration(milliseconds: 345));
+
       setAddress(ipAddress);
       setPath(path);
       setPassword(rpcPassword);

pubspec_base.yaml

@@ -17,7 +17,7 @@ dependencies:
   fast_scanner:
     git:
       url: https://github.com/MrCyjaneK/fast_scanner
-      ref: c5a08720216a508bf1fe3d062ad19d2836545a42
+      ref: 69b3276b090fa6ac01b4483ca3adca93a8e615be
   http: ^1.1.0
   path_provider: ^2.0.11
   mobx: ^2.1.4