add mutex around _confirmForm to prevent the wallets from breaking (#1602)

* add mutex around _confirmForm to prevent the wallets from breaking

* add async

* drop mutex for a boolean

* don't make the variable global

lib/src/screens/new_wallet/new_wallet_page.dart

@@ -25,6 +25,7 @@ import 'package:cake_wallet/themes/extensions/new_wallet_theme.dart';
 import 'package:cake_wallet/themes/extensions/send_page_theme.dart';
 import 'package:cake_wallet/entities/seed_type.dart';
 
+
 class NewWalletPage extends BasePage {
   NewWalletPage(this._walletNewVM, this._seedTypeViewModel);
 
@@ -74,6 +75,7 @@ class _WalletNameFormState extends State<WalletNameForm> {
             _walletNewVM.hasWalletPassword ? TextEditingController() : null;
 
   static const aspectRatioImage = 1.22;
+  static bool formProcessing = false;
 
   final GlobalKey<FormState> _formKey;
   final GlobalKey<SeedLanguageSelectorState> _languageSelectorKey;
@@ -347,12 +349,16 @@ class _WalletNameFormState extends State<WalletNameForm> {
     );
   }
 
-  void _confirmForm() {
+  void _confirmForm() async {
+    if (formProcessing) return;
+    formProcessing = true;
+    try {
       if (_formKey.currentState != null && !_formKey.currentState!.validate()) {
+        formProcessing = false;
         return;
       }
       if (_walletNewVM.nameExists(_walletNewVM.name)) {
-      showPopUp<void>(
+        await showPopUp<void>(
             context: context,
             builder: (_) {
               return AlertWithOneAction(
@@ -362,11 +368,16 @@ class _WalletNameFormState extends State<WalletNameForm> {
                   buttonAction: () => Navigator.of(context).pop());
             });
       } else {
-      _walletNewVM.create(
+        await _walletNewVM.create(
             options: _walletNewVM.hasLanguageSelector
                 ? [_languageSelectorKey.currentState!.selected, isPolyseed]
                 : null);
       }
+    } catch (e) {
+      formProcessing = false;
+      rethrow;
+    }
+    formProcessing = false;
   }
 
   bool get isPolyseed => widget._seedTypeViewModel.moneroSeedType == SeedType.polyseed;

lib/src/screens/restore/wallet_restore_page.dart

@@ -2,6 +2,7 @@ import 'package:cake_wallet/core/execution_state.dart';
 import 'package:cake_wallet/generated/i18n.dart';
 import 'package:cake_wallet/routes.dart';
 import 'package:cake_wallet/src/screens/base_page.dart';
+import 'package:cake_wallet/src/screens/new_wallet/new_wallet_page.dart';
 import 'package:cake_wallet/src/screens/restore/wallet_restore_from_keys_form.dart';
 import 'package:cake_wallet/src/screens/restore/wallet_restore_from_seed_form.dart';
 import 'package:cake_wallet/src/widgets/alert_with_one_action.dart';
@@ -80,6 +81,8 @@ class WalletRestorePage extends BasePage {
     });
   }
 
+  static bool formProcessing = false;
+
   @override
   Widget middle(BuildContext context) => Observer(
       builder: (_) => Text(
@@ -350,6 +353,9 @@ class WalletRestorePage extends BasePage {
   }
 
   Future<void> _confirmForm(BuildContext context) async {
+    if (formProcessing) return;
+    formProcessing = true;
+    try {
       // Dismissing all visible keyboard to provide context for navigation
       FocusManager.instance.primaryFocus?.unfocus();
 
@@ -367,11 +373,13 @@ class WalletRestorePage extends BasePage {
       }
 
       if (!formKey!.currentState!.validate()) {
+        formProcessing = false;
         return;
       }
 
       if (walletRestoreViewModel.nameExists(name)) {
         showNameExistsAlert(formContext!);
+        formProcessing = false;
         return;
       }
 
@@ -418,7 +426,12 @@ class WalletRestorePage extends BasePage {
         this.derivationInfo = walletRestoreViewModel.getDefaultDerivation();
       }
 
-    walletRestoreViewModel.create(options: _credentials());
+      await walletRestoreViewModel.create(options: _credentials());
+    } catch (e) {
+      formProcessing = false;
+      rethrow;
+    }
+    formProcessing = false;
   }
 
   Future<void> showNameExistsAlert(BuildContext context) {