fix: handle unexpected ViewModel in ledger connection process (#2716)

* fix: handle unexpected ViewModel in ledger connection process

* fix: add missing exception handler for `_QueuedFuture.execute` in `exception_handler.dart`

lib/reactions/on_authentication_state_change.dart

@@ -61,8 +61,21 @@ void startAuthenticationStateChange(
             walletType: WalletType.monero,
             hardwareWalletType: HardwareWalletType.ledger,
             onConnectDevice: (context, ledgerVM) async {
-              if (ledgerVM is LedgerViewModel)
+              if (ledgerVM is LedgerViewModel) {
                 monero!.setGlobalLedgerConnection(ledgerVM.connection);
+              } else {
+                await showPopUp<void>(
+                  context: context,
+                  builder: (context) => AlertWithOneAction(
+                    alertTitle: "Unexpected Error",
+                    alertContent:
+                        "Unexpected Error while trying to connect to the device (UnexpectedViewModel: ${ledgerVM.toString()})",
+                    buttonText: S.of(context).try_again,
+                    buttonAction: Navigator.of(context).pop,
+                  ),
+                );
+                return;
+              }
               showPopUp<void>(
                 context: context,
                 builder: (context) => AlertWithOneAction(

lib/src/screens/wallet_list/wallet_list_page.dart

@@ -29,7 +29,6 @@ import 'package:cake_wallet/view_model/wallet_list/wallet_list_view_model.dart';
 import 'package:cake_wallet/wallet_type_utils.dart';
 import 'package:cw_core/currency_for_wallet_type.dart';
 import 'package:cw_core/wallet_info.dart';
-import 'package:cw_core/utils/print_verbose.dart';
 import 'package:cw_core/wallet_type.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_mobx/flutter_mobx.dart';
@@ -484,10 +483,11 @@ class WalletListBodyState extends State<WalletListBody> {
                 walletType: WalletType.monero,
                 hardwareWalletType: HardwareWalletType.ledger,
                 onConnectDevice: (context, ledgerVM) async {
-                  if (ledgerVM is LedgerViewModel)
+                  if (ledgerVM is LedgerViewModel) {
                     monero!.setGlobalLedgerConnection(ledgerVM.connection);
-                  didConnect = true;
-                  Navigator.of(context).pop();
+                    didConnect = true;
+                    Navigator.of(context).pop();
+                  }
                 },
                 isReconnect: true,
               ),

lib/utils/exception_handler.dart

@@ -293,6 +293,7 @@ class ExceptionHandler {
     
     "FocusScopeNode was used after being disposed",
     "_getDismissibleFlushbar",
+    "_QueuedFuture.execute (package:universal_ble/src/queue.dart:65)",
   ];
 
   static Future<void> _addDeviceInfo(File file) async {