diff --git a/lib/bitcoin/electrum.dart b/lib/bitcoin/electrum.dart
index bd1ac09ac..5f034bc6a 100644
--- a/lib/bitcoin/electrum.dart
+++ b/lib/bitcoin/electrum.dart
@@ -87,7 +87,7 @@ class ElectrumClient {
 
   Future<void> ping() async {
     try {
-      await callWithTimeout(method: 'server.ping');
+      // await callWithTimeout(method: 'server.ping');
       _setIsConnected(true);
     } on RequestFailedTimeoutException catch (_) {
       _setIsConnected(false);
diff --git a/lib/core/contact_service.dart b/lib/core/contact_service.dart
index 73a5bed27..1141a1d06 100644
--- a/lib/core/contact_service.dart
+++ b/lib/core/contact_service.dart
@@ -12,7 +12,7 @@ class ContactService {
 
   Future add(Contact contact) async {
     await contactSource.add(contact);
-    contactListStore.contacts.add(contact);
+    // contactListStore.contacts.add(contact);
   }
 
   Future update(Contact contact) async {
diff --git a/lib/di.dart b/lib/di.dart
index 7c08d9e49..1b533d69c 100644
--- a/lib/di.dart
+++ b/lib/di.dart
@@ -294,11 +294,13 @@ Future setup(
 
   getIt.registerFactoryParam<ContactViewModel, Contact, void>(
       (Contact contact, _) => ContactViewModel(
-          getIt.get<ContactService>(), getIt.get<AppStore>().wallet,
+          contactSource, getIt.get<AppStore>().wallet,
           contact: contact));
 
   getIt.registerFactory(() => ContactListViewModel(
-      getIt.get<AppStore>().contactListStore, getIt.get<ContactService>()));
+      getIt.get<AppStore>().contactListStore,
+      getIt.get<ContactService>(),
+      contactSource));
 
   getIt.registerFactory(
       () => ContactListPage(getIt.get<ContactListViewModel>()));
diff --git a/lib/src/domain/common/contact.dart b/lib/src/domain/common/contact.dart
index faa4f8ecf..4aca925eb 100644
--- a/lib/src/domain/common/contact.dart
+++ b/lib/src/domain/common/contact.dart
@@ -1,11 +1,12 @@
 import 'package:flutter/foundation.dart';
 import 'package:hive/hive.dart';
 import 'package:cake_wallet/src/domain/common/crypto_currency.dart';
+import 'package:cake_wallet/utils/mobx.dart';
 
 part 'contact.g.dart';
 
 @HiveType(typeId: 0)
-class Contact extends HiveObject {
+class Contact extends HiveObject with Keyable {
   Contact({@required this.name, @required this.address, CryptoCurrency type})
       : raw = type?.raw;
 
@@ -22,6 +23,9 @@ class Contact extends HiveObject {
 
   CryptoCurrency get type => CryptoCurrency.deserialize(raw: raw);
 
+  @override
+  dynamic get keyIndex => key;
+
   @override
   bool operator ==(Object o) => o is Contact && o.key == key;
 
diff --git a/lib/src/domain/common/node.dart b/lib/src/domain/common/node.dart
index b47f002e9..931eabf6c 100644
--- a/lib/src/domain/common/node.dart
+++ b/lib/src/domain/common/node.dart
@@ -1,3 +1,4 @@
+import 'package:cake_wallet/utils/mobx.dart';
 import 'package:flutter/foundation.dart';
 import 'dart:convert';
 import 'package:http/http.dart' as http;
@@ -8,7 +9,7 @@ import 'package:cake_wallet/src/domain/common/digest_request.dart';
 part 'node.g.dart';
 
 @HiveType(typeId: 1)
-class Node extends HiveObject {
+class Node extends HiveObject with Keyable {
   Node(
       {@required this.uri,
       @required WalletType type,
diff --git a/lib/src/screens/nodes/nodes_list_page.dart b/lib/src/screens/nodes/nodes_list_page.dart
index ab715058c..b5a6dfba1 100644
--- a/lib/src/screens/nodes/nodes_list_page.dart
+++ b/lib/src/screens/nodes/nodes_list_page.dart
@@ -108,7 +108,7 @@ class NodeListPage extends BasePage {
                   });
 
               final dismissibleRow = Dismissible(
-                  key: Key('${node.value.key}'),
+                  key: Key('${node.keyIndex}'),
                   confirmDismiss: (direction) async {
                     return await showDialog(
                         context: context,
diff --git a/lib/store/settings_store.dart b/lib/store/settings_store.dart
index f27943be4..87eb8f4d9 100644
--- a/lib/store/settings_store.dart
+++ b/lib/store/settings_store.dart
@@ -44,9 +44,9 @@ abstract class SettingsStoreBase with Store {
     languageCode = initialLanguageCode;
     currentLocale = initialCurrentLocale;
     itemHeaders = {};
+    this.nodes = ObservableMap<WalletType, Node>.of(nodes);
     _sharedPreferences = sharedPreferences;
     _nodeSource = nodeSource;
-    _nodes = nodes;
   }
 
   static const currentNodeIdKey = 'current_node_id';
@@ -101,9 +101,9 @@ abstract class SettingsStoreBase with Store {
   SharedPreferences _sharedPreferences;
   Box<Node> _nodeSource;
 
-  Map<WalletType, Node> _nodes;
+  ObservableMap<WalletType, Node> nodes;
 
-  Node getCurrentNode(WalletType walletType) => _nodes[walletType];
+  Node getCurrentNode(WalletType walletType) => nodes[walletType];
 
   Future<void> setCurrentNode(Node node, WalletType walletType) async {
     switch (walletType) {
@@ -118,7 +118,7 @@ abstract class SettingsStoreBase with Store {
         break;
     }
 
-    _nodes[walletType] = node;
+    nodes[walletType] = node;
   }
 
   static Future<SettingsStore> load(
diff --git a/lib/utils/item_cell.dart b/lib/utils/item_cell.dart
new file mode 100644
index 000000000..4aca57b46
--- /dev/null
+++ b/lib/utils/item_cell.dart
@@ -0,0 +1,11 @@
+import 'package:flutter/foundation.dart';
+import 'package:cake_wallet/utils/mobx.dart';
+
+class ItemCell<Item> with Keyable {
+  ItemCell(this.value, {@required this.isSelected, @required dynamic key}) {
+    keyIndex = key;
+  }
+
+  final Item value;
+  final bool isSelected;
+}
diff --git a/lib/utils/mobx.dart b/lib/utils/mobx.dart
index 0065a939d..6a8413aff 100644
--- a/lib/utils/mobx.dart
+++ b/lib/utils/mobx.dart
@@ -1,46 +1,90 @@
+import 'dart:async';
+
+import 'package:hive/hive.dart';
 import 'package:mobx/mobx.dart';
 
-void connectDifferent<T, Y>(
+mixin Keyable {
+  dynamic keyIndex;
+}
+
+void connectDifferent<T extends Keyable, Y extends Keyable>(
     ObservableList<T> source, ObservableList<Y> dest, Y Function(T) transform,
     {bool Function(T) filter}) {
   source.observe((ListChange<T> change) {
-//     switch (change.type) {
-//       case OperationType.add:
-//         final _values = change.added;
-//         Iterable<T> values;
+    change.elementChanges.forEach((change) {
+      switch (change.type) {
+        case OperationType.add:
+          if (filter?.call(change.newValue as T) ?? true) {
+            dest.add(transform(change.newValue as T));
+          }
+          break;
+        case OperationType.remove:
+          // Hive could has equal index and key
+          dest.removeWhere(
+              (elem) => elem.keyIndex == (change.oldValue.key ?? change.index));
+          break;
+        case OperationType.update:
+          for (var i = 0; i < dest.length; i++) {
+            final item = dest[i];
 
-//         if (filter != null) {
-//           values = _values.where(filter);
-//         }
-
-//         dest.addAll(values.map((e) => transform(e)));
-//         break;
-//       case OperationType.remove:
-//         change.removed.forEach((element) {
-//           dest.remove(element);
-//         });
-
-// //        dest.removeAt(change.index);
-//         break;
-//       case OperationType.update:
-// //        change.index
-//         break;
-//     }
+            if (item.keyIndex == change.newValue.key) {
+              dest[i] = transform(change.newValue as T);
+            }
+          }
+          break;
+      }
+    });
   });
 }
 
-void connect<T>(ObservableList<T> source, ObservableList<T> dest) {
+void connect<T extends Keyable>(
+    ObservableList<T> source, ObservableList<T> dest) {
   source.observe((ListChange<T> change) {
-//     switch (change.type) {
-//       case OperationType.add:
-//         dest.addAll(change.added);
-//         break;
-//       case OperationType.remove:
-//         dest.removeAt(change.index);
-//         break;
-//       case OperationType.update:
-// //        change.index
-//         break;
-//     }
+    source.observe((ListChange<T> change) {
+      change.elementChanges.forEach((change) {
+        switch (change.type) {
+          case OperationType.add:
+            // if (filter?.call(change.newValue as T) ?? true) {
+            dest.add(change.newValue as T);
+            // }
+            break;
+          case OperationType.remove:
+            // Hive could has equal index and key
+            dest.removeWhere((elem) =>
+                elem.keyIndex == (change.oldValue.key ?? change.index));
+            break;
+          case OperationType.update:
+            for (var i = 0; i < dest.length; i++) {
+              final item = dest[i];
+
+              if (item.keyIndex == change.newValue.key) {
+                dest[i] = change.newValue as T;
+              }
+            }
+            break;
+        }
+      });
+    });
+  });
+}
+
+StreamSubscription<BoxEvent> bindBox<T extends Keyable>(
+    Box<T> source, ObservableList<T> dest) {
+  return source.watch().listen((event) {
+    if (event.deleted) {
+      dest.removeWhere((el) => el.keyIndex == event.key);
+    }
+
+    final dynamic value = event.value;
+
+    if (value is T) {
+      final elIndex = dest.indexWhere((el) => el.keyIndex == value.keyIndex);
+
+      if (elIndex > -1) {
+        dest[elIndex] = value;
+      } else {
+        dest.add(value);
+      }
+    }
   });
 }
diff --git a/lib/view_model/contact_list/contact_list_view_model.dart b/lib/view_model/contact_list/contact_list_view_model.dart
index a3f526a86..87917b25a 100644
--- a/lib/view_model/contact_list/contact_list_view_model.dart
+++ b/lib/view_model/contact_list/contact_list_view_model.dart
@@ -1,20 +1,34 @@
+import 'dart:async';
+
+import 'package:hive/hive.dart';
 import 'package:mobx/mobx.dart';
 import 'package:cake_wallet/core/contact_service.dart';
 import 'package:cake_wallet/store/contact_list_store.dart';
 import 'package:cake_wallet/src/domain/common/contact.dart';
+import 'package:cake_wallet/utils/mobx.dart';
 
 part 'contact_list_view_model.g.dart';
 
-class ContactListViewModel = ContactListViewModelBase with _$ContactListViewModel;
+class ContactListViewModel = ContactListViewModelBase
+    with _$ContactListViewModel;
 
 abstract class ContactListViewModelBase with Store {
-  ContactListViewModelBase(this.addressBookStore, this.contactService);
+  ContactListViewModelBase(
+      this.addressBookStore, this.contactService, this.contactSource) {
+    _subscription = bindBox(contactSource, addressBookStore.contacts);
+  }
 
   final ContactListStore addressBookStore;
   final ContactService contactService;
+  final Box<Contact> contactSource;
 
-  @computed
   ObservableList<Contact> get contacts => addressBookStore.contacts;
 
+  StreamSubscription<BoxEvent> _subscription;
+
+  void dispose() {
+    _subscription.cancel();
+  }
+
   Future<void> delete(Contact contact) async => contactService.delete(contact);
-}
\ No newline at end of file
+}
diff --git a/lib/view_model/contact_list/contact_view_model.dart b/lib/view_model/contact_list/contact_view_model.dart
index addb56606..780f5ca66 100644
--- a/lib/view_model/contact_list/contact_view_model.dart
+++ b/lib/view_model/contact_list/contact_view_model.dart
@@ -1,3 +1,4 @@
+import 'package:hive/hive.dart';
 import 'package:mobx/mobx.dart';
 import 'package:cake_wallet/core/wallet_base.dart';
 import 'package:cake_wallet/core/contact_service.dart';
@@ -10,7 +11,7 @@ part 'contact_view_model.g.dart';
 class ContactViewModel = ContactViewModelBase with _$ContactViewModel;
 
 abstract class ContactViewModelBase with Store {
-  ContactViewModelBase(this._contactService, this._wallet, {Contact contact})
+  ContactViewModelBase(this._contacts, this._wallet, {Contact contact})
       : state = InitialContactViewModelState(),
         currencies = CryptoCurrency.all,
         _contact = contact {
@@ -33,12 +34,14 @@ abstract class ContactViewModelBase with Store {
 
   @computed
   bool get isReady =>
-      (name?.isNotEmpty ?? false) && (currency?.toString()?.isNotEmpty ?? false)
-      && (address?.isNotEmpty ?? false);
+      (name?.isNotEmpty ?? false) &&
+      (currency?.toString()?.isNotEmpty ?? false) &&
+      (address?.isNotEmpty ?? false);
 
   final List<CryptoCurrency> currencies;
-  final ContactService _contactService;
+  // final ContactService _contactService;
   final WalletBase _wallet;
+  final Box<Contact> _contacts;
   final Contact _contact;
 
   @action
@@ -57,10 +60,13 @@ abstract class ContactViewModelBase with Store {
         _contact.name = name;
         _contact.address = address;
         _contact.updateCryptoCurrency(currency: currency);
-        await _contactService.update(_contact);
+        await _contacts.put(_contact.key, _contact);
+        // await _contactService.update(_contact);
       } else {
-        await _contactService
+        await _contacts
             .add(Contact(name: name, address: address, type: currency));
+        // await _contactService
+        //     .add(Contact(name: name, address: address, type: currency));
       }
 
       state = ContactSavingSuccessfully();
diff --git a/lib/view_model/node_list/node_list_view_model.dart b/lib/view_model/node_list/node_list_view_model.dart
index 73f2b934e..4a68d23aa 100644
--- a/lib/view_model/node_list/node_list_view_model.dart
+++ b/lib/view_model/node_list/node_list_view_model.dart
@@ -1,3 +1,4 @@
+import 'package:cake_wallet/utils/item_cell.dart';
 import 'package:flutter/foundation.dart';
 import 'package:hive/hive.dart';
 import 'package:mobx/mobx.dart';
@@ -14,13 +15,6 @@ part 'node_list_view_model.g.dart';
 
 class NodeListViewModel = NodeListViewModelBase with _$NodeListViewModel;
 
-class ItemCell<Item> {
-  ItemCell(this.value, {@required this.isSelected});
-
-  final Item value;
-  final bool isSelected;
-}
-
 abstract class NodeListViewModelBase with Store {
   NodeListViewModelBase(
       this._nodeListStore, this._nodeSource, this._wallet, this._settingsStore)
@@ -29,16 +23,16 @@ abstract class NodeListViewModelBase with Store {
     final values = _nodeListStore.nodes;
     nodes.clear();
     nodes.addAll(values.where((Node node) => node.type == _wallet.type).map(
-        (Node val) =>
-            ItemCell<Node>(val, isSelected: val.key == currentNode.key)));
+        (Node val) => ItemCell<Node>(val,
+            isSelected: val.key == currentNode.key, key: val.key)));
     connectDifferent(
         _nodeListStore.nodes,
         nodes,
-        (Node val) =>
-            ItemCell<Node>(val, isSelected: val.key == currentNode.key),
-        filter: (Node val) {
-          return val.type == _wallet.type;
-        });
+        (Node val) => ItemCell<Node>(val,
+            isSelected: val.key == currentNode.key, key: val.key),
+        filter: (Node val) => val.type == _wallet.type);
+    reaction((_) => _settingsStore.nodes[_wallet.type],
+        (Node _) => _updateCurrentNode());
   }
 
   ObservableList<ItemCell<Node>> nodes;
@@ -66,17 +60,18 @@ abstract class NodeListViewModelBase with Store {
         break;
     }
 
-    await _wallet.connectToNode(node: node);
+    await setAsCurrent(node);
   }
 
   Future<void> delete(Node node) async => _nodeSource.delete(node.key);
 
   Future<void> setAsCurrent(Node node) async {
-    await _wallet.connectToNode(node: node);
     await _settingsStore.setCurrentNode(node, _wallet.type);
     _updateCurrentNode();
+    await _wallet.connectToNode(node: node);
   }
 
+  @action
   void _updateCurrentNode() {
     final currentNode = _settingsStore.getCurrentNode(_wallet.type);
 
@@ -85,7 +80,8 @@ abstract class NodeListViewModelBase with Store {
       final isSelected = item.value.key == currentNode.key;
 
       if (item.isSelected != isSelected) {
-        nodes[i] = ItemCell<Node>(item.value, isSelected: isSelected);
+        nodes[i] = ItemCell<Node>(item.value,
+            isSelected: isSelected, key: item.keyIndex);
       }
     }
   }
diff --git a/lib/view_model/wallet_address_list/wallet_address_list_view_model.dart b/lib/view_model/wallet_address_list/wallet_address_list_view_model.dart
index 4f2e3662c..0b02bc08a 100644
--- a/lib/view_model/wallet_address_list/wallet_address_list_view_model.dart
+++ b/lib/view_model/wallet_address_list/wallet_address_list_view_model.dart
@@ -67,7 +67,8 @@ abstract class WalletAddressListViewModelBase with Store {
   WalletType get type => _wallet.type;
 
   @computed
-  WalletAddressListItem get address => WalletAddressListItem(address: _wallet.address);
+  WalletAddressListItem get address =>
+      WalletAddressListItem(address: _wallet.address);
 
   @computed
   PaymentURI get uri {
@@ -100,15 +101,16 @@ abstract class WalletAddressListViewModelBase with Store {
     }
 
     if (wallet is BitcoinWallet) {
-      final bitcoinAddresses = wallet.addresses.map(
-          (addr) => WalletAddressListItem(name: addr.label, address: addr.address));
+      final bitcoinAddresses = wallet.addresses.map((addr) =>
+          WalletAddressListItem(name: addr.label, address: addr.address));
       addressList.addAll(bitcoinAddresses);
     }
 
     return addressList;
   }
 
-  set address(WalletAddressListItem address) => _wallet.address = address.address;
+  set address(WalletAddressListItem address) =>
+      _wallet.address = address.address;
 
   bool hasAccounts;