Fixes for gray screen bug.

cw_monero/ios/Classes/monero_api.cpp

@@ -175,6 +175,7 @@ extern "C"
     Monero::SubaddressAccount *m_account;
     uint64_t m_last_known_wallet_height;
     uint64_t m_cached_syncing_blockchain_height = 0;
+    std::mutex store_mutex;
 
 
     void change_current_wallet(Monero::Wallet *wallet)
@@ -293,6 +294,7 @@ extern "C"
 
     void load_wallet(char *path, char *password, int32_t nettype)
     {
+        nice(19);
         Monero::NetworkType networkType = static_cast<Monero::NetworkType>(nettype);
         Monero::Wallet *wallet = Monero::WalletManagerFactory::getWalletManager()->openWallet(std::string(path), std::string(password), networkType);
         change_current_wallet(wallet);
@@ -429,7 +431,9 @@ extern "C"
 
     void store(char *path)
     {
+        store_mutex.lock();
         get_current_wallet()->store(std::string(path));
+        store_mutex.unlock();       
     }
 
     bool transaction_create(char *address, char *payment_id, char *amount,

ios/Flutter/.last_build_id

@@ -1 +0,0 @@
-4dc2ef1ba73deeed13cd85894dacb10b

lib/di.dart

@@ -61,6 +61,7 @@ import 'package:cake_wallet/view_model/exchange/exchange_view_model.dart';
 import 'package:flutter/widgets.dart';
 import 'package:get_it/get_it.dart';
 import 'package:hive/hive.dart';
+import 'package:mobx/mobx.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 import 'package:flutter_secure_storage/flutter_secure_storage.dart';
 import 'package:cake_wallet/view_model/wallet_restoration_from_seed_vm.dart';
@@ -177,11 +178,25 @@ Future setup(
       BiometricAuth()));
 
   getIt.registerFactory<AuthPage>(
-      () => AuthPage(getIt.get<AuthViewModel>(),
+      () => AuthPage(getIt.get<AuthViewModel>(), onAuthenticationFinished:
-              onAuthenticationFinished: (isAuthenticated, __) {
+              (isAuthenticated, AuthPageState authPageState) {
-            if (isAuthenticated) {
+            if (!isAuthenticated) {
-              getIt.get<AuthenticationStore>().allowed();
+              return;
             }
+            final authStore = getIt.get<AuthenticationStore>();
+            final appStore = getIt.get<AppStore>();
+
+            if (appStore.wallet != null) {
+              authStore.allowed();
+              return;
+            }
+
+            authPageState.changeProcessText('Loading the wallet');
+            ReactionDisposer _reaction;
+            _reaction = reaction((_) => appStore.wallet, (Object _) {
+              _reaction?.reaction?.dispose();
+              authStore.allowed();
+            });
           }, closable: false),
       instanceName: 'login');
 

lib/monero/monero_wallet.dart

@@ -19,6 +19,7 @@ import 'package:cake_wallet/entities/wallet_info.dart';
 import 'package:cake_wallet/entities/node.dart';
 import 'package:cake_wallet/entities/transaction_priority.dart';
 
+
 part 'monero_wallet.g.dart';
 
 const moneroBlockSize = 1000;
@@ -40,6 +41,7 @@ abstract class MoneroWalletBase extends WalletBase<MoneroBalance> with Store {
       subaddress = subaddressList.subaddresses.first;
       address = subaddress.address;
     });
+    _cachedRefreshHeight = 0;
   }
 
   @override
@@ -80,6 +82,7 @@ abstract class MoneroWalletBase extends WalletBase<MoneroBalance> with Store {
   String _filename;
   SyncListner _listener;
   ReactionDisposer _onAccountChangeReaction;
+  int _cachedRefreshHeight;
 
   Future<void> init() async {
     await accountList.update();
@@ -177,7 +180,9 @@ abstract class MoneroWalletBase extends WalletBase<MoneroBalance> with Store {
 
   @override
   Future<void> save() async {
+    print('SAVE CALLED');
     await monero_wallet.store();
+    print('SAVE FINISHED');
   }
 
   Future<int> getNodeHeight() async => monero_wallet.getNodeHeight();
@@ -191,12 +196,15 @@ abstract class MoneroWalletBase extends WalletBase<MoneroBalance> with Store {
 
   @override
   Future<void> rescan({int height}) async {
+    walletInfo.restoreHeight = height;
+    walletInfo.isRecovery = true;
     monero_wallet.setRefreshFromBlockHeight(height: height);
     monero_wallet.rescanBlockchainAsync();
     await startSync();
     _askForUpdateBalance();
     await _askForUpdateTransactionHistory();
     await save();
+    await walletInfo.save();
   }
 
   void _setListeners() {
@@ -284,7 +292,10 @@ abstract class MoneroWalletBase extends WalletBase<MoneroBalance> with Store {
       await setAsRecovered();
     }
 
-    await save();
+    if (currentHeight - _cachedRefreshHeight > moneroBlockSize) {
+      _cachedRefreshHeight = currentHeight;
+      await save();
+    }
   }
 
   void _onNewTransaction() {

lib/src/screens/dashboard/wallet_menu.dart

@@ -87,8 +87,8 @@ class WalletMenu {
               rightButtonText: S.of(context).ok,
               leftButtonText: S.of(context).cancel,
               actionRightButton: () async {
-                await reconnect?.call();
                 Navigator.of(context).pop();
+                await reconnect?.call();
               },
               actionLeftButton: () => Navigator.of(context).pop());
         });