CAKE-334 | applied unspent coins control to the app; added unspent_coins_info.dart; reworked createTransaction(), calculateEstimatedFee() and updateUnspent() methods in the electrum_wallet.dart; fixed unspent_coins_list_view_model.dart, unspent_coins_details_view_model.dart, unspent_coins_list_item.dart, unspent_coins_list_page.dart and unspent_coins_details_page.dart; fixed bitcoin_transaction_wrong_balance_exception.dart; added properties to bitcoin_unspent.dart; applied localization to unspent coins pages

lib/view_model/send/send_view_model.dart

@@ -1,7 +1,6 @@
 import 'package:cake_wallet/bitcoin/bitcoin_amount_format.dart';
 import 'package:cake_wallet/bitcoin/bitcoin_transaction_priority.dart';
 import 'package:cake_wallet/bitcoin/electrum_wallet.dart';
-import 'package:cake_wallet/entities/balance_display_mode.dart';
 import 'package:cake_wallet/entities/calculate_fiat_amount_raw.dart';
 import 'package:cake_wallet/entities/transaction_description.dart';
 import 'package:cake_wallet/entities/transaction_priority.dart';
@@ -20,7 +19,6 @@ import 'package:cake_wallet/core/pending_transaction.dart';
 import 'package:cake_wallet/core/validator.dart';
 import 'package:cake_wallet/core/wallet_base.dart';
 import 'package:cake_wallet/core/execution_state.dart';
-import 'package:cake_wallet/bitcoin/bitcoin_wallet.dart';
 import 'package:cake_wallet/bitcoin/bitcoin_transaction_credentials.dart';
 import 'package:cake_wallet/monero/monero_wallet.dart';
 import 'package:cake_wallet/monero/monero_transaction_creation_credentials.dart';
@@ -55,7 +53,7 @@ abstract class SendViewModelBase with Store {
       _settingsStore.priority[_wallet.type] = priorities.first;
     }
 
-    isBitcoinWallet  = _wallet is BitcoinWallet;
+    isElectrumWallet  = _wallet is ElectrumWallet;
 
     _setCryptoNumMaximumFractionDigits();
   }
@@ -185,7 +183,7 @@ abstract class SendViewModelBase with Store {
   PendingTransaction pendingTransaction;
 
   @observable
-  bool isBitcoinWallet;
+  bool isElectrumWallet;
 
   @computed
   String get balance => _wallet.balance.formattedAvailableBalance ?? '0.0';

lib/view_model/unspent_coins/unspent_coins_details_view_model.dart

@@ -3,6 +3,7 @@ import 'package:cake_wallet/src/screens/transaction_details/textfield_list_item.
 import 'package:cake_wallet/src/screens/transaction_details/transaction_details_list_item.dart';
 import 'package:cake_wallet/view_model/unspent_coins/unspent_coins_item.dart';
 import 'package:cake_wallet/generated/i18n.dart';
+import 'package:cake_wallet/view_model/unspent_coins/unspent_coins_list_view_model.dart';
 import 'package:cake_wallet/view_model/unspent_coins/unspent_coins_switch_item.dart';
 import 'package:mobx/mobx.dart';
 
@@ -12,7 +13,9 @@ class UnspentCoinsDetailsViewModel = UnspentCoinsDetailsViewModelBase
     with _$UnspentCoinsDetailsViewModel;
 
 abstract class UnspentCoinsDetailsViewModelBase with Store {
-  UnspentCoinsDetailsViewModelBase({this.unspentCoinsItem}) {
+  UnspentCoinsDetailsViewModelBase({
+    this.unspentCoinsItem, this.unspentCoinsListViewModel}) {
+
     final amount = unspentCoinsItem.amount ?? '';
     final address = unspentCoinsItem.address ?? '';
     isFrozen = unspentCoinsItem.isFrozen ?? false;
@@ -20,25 +23,31 @@ abstract class UnspentCoinsDetailsViewModelBase with Store {
 
     items = [
       StandartListItem(
-        title: 'Amount',
+        title: S.current.transaction_details_amount,
         value: amount
       ),
       StandartListItem(
-        title: 'Address',
+        title: S.current.widgets_address,
         value: address
       ),
       TextFieldListItem(
           title: S.current.note_tap_to_change,
           value: note,
           onSubmitted: (value) {
-            note = value;
+            unspentCoinsItem.note = value;
+            unspentCoinsListViewModel.saveUnspentCoinInfo(unspentCoinsItem);
           }),
       UnspentCoinsSwitchItem(
-        title: 'Freeze',
+        title: S.current.freeze,
         value: '',
         switchValue: () => isFrozen,
-        onSwitchValueChange: (value) {
+        onSwitchValueChange: (value) async {
           isFrozen = value;
+          unspentCoinsItem.isFrozen = value;
+          if (value) {
+            unspentCoinsItem.isSending = !value;
+          }
+          await unspentCoinsListViewModel.saveUnspentCoinInfo(unspentCoinsItem);
         }
       )
     ];
@@ -51,5 +60,6 @@ abstract class UnspentCoinsDetailsViewModelBase with Store {
   String note;
 
   final UnspentCoinsItem unspentCoinsItem;
+  final UnspentCoinsListViewModel unspentCoinsListViewModel;
   List<TransactionDetailsListItem> items;
 }

lib/view_model/unspent_coins/unspent_coins_item.dart

@@ -1,14 +1,33 @@
-class UnspentCoinsItem {
-  UnspentCoinsItem({
+import 'package:mobx/mobx.dart';
+
+part 'unspent_coins_item.g.dart';
+
+class UnspentCoinsItem = UnspentCoinsItemBase with _$UnspentCoinsItem;
+
+abstract class UnspentCoinsItemBase with Store {
+  UnspentCoinsItemBase({
     this.address,
     this.amount,
+    this.hash,
     this.isFrozen,
     this.note,
-    this.isSending = true});
+    this.isSending});
 
-  final String address;
-  final String amount;
-  final bool isFrozen;
-  final String note;
-  final bool isSending;
+  @observable
+  String address;
+
+  @observable
+  String amount;
+
+  @observable
+  String hash;
+
+  @observable
+  bool isFrozen;
+
+  @observable
+  String note;
+
+  @observable
+  bool isSending;
 }

lib/view_model/unspent_coins/unspent_coins_list_view_model.dart

@@ -1,61 +1,58 @@
+import 'package:cake_wallet/bitcoin/bitcoin_amount_format.dart';
+import 'package:cake_wallet/bitcoin/electrum_wallet.dart';
+import 'package:cake_wallet/bitcoin/unspent_coins_info.dart';
+import 'package:cake_wallet/core/wallet_base.dart';
 import 'package:cake_wallet/view_model/unspent_coins/unspent_coins_item.dart';
+import 'package:flutter/foundation.dart';
+import 'package:hive/hive.dart';
 import 'package:mobx/mobx.dart';
 
 part 'unspent_coins_list_view_model.g.dart';
 
-const List<Map<String, dynamic>> unspentCoinsMap = [
-  <String, dynamic>{
-    "address" : "bc1qm80mu5p3mf04a7cj7teymasf04dwpc3av2fwtr",
-    "amount" : "0.00358 BTC",
-    "isFrozen" : true,
-    "note" : "333cvgf23132132132132131321321314rwrtdggfdddewq ewqasfdxgdhgfgfszczcxgbhhhbcgbc"},
-  <String, dynamic>{
-    "address" : "bc1qm80mu5p3mf04a7cj7teymasf04dwpc3av2fwtr",
-    "amount" : "0.00567894 BTC",
-    "note" : "sfjskf"},
-  <String, dynamic>{
-    "address" : "bc1qm80mu5p3mf04a7cj7teymasf04dwpc3av2fwtr",
-    "amount" : "0.00087 BTC",
-    "isFrozen" : false},
-  <String, dynamic>{
-    "address" : "bc1qm80mu5p3mf04a7cj7teymasf04dwpc3av2fwtr",
-    "amount" : "0.00012 BTC",
-    "isFrozen" : true,
-    "note" : "333cvgf23132132132132131321321314rwrtdggfdddewq ewqasfdxgdhgfgfszczcxgbhhhbcgbc"},
-  <String, dynamic>{
-    "address" : "bc1qm80mu5p3mf04a7cj7teymasf04dwpc3av2fwtr",
-    "amount" : "0.00574 BTC",
-    "note" : "sffsfsdsgs"},
-  <String, dynamic>{
-    "address" : "bc1qm80mu5p3mf04a7cj7teymasf04dwpc3av2fwtr",
-    "amount" : "0.000482 BTC",
-    "isFrozen" : false},
-  <String, dynamic>{},
-  <String, dynamic>{
-    "address" : "bc1qm80mu5p3mf04a7cj7teymasf04dwpc3av2fwtr",
-    "amount" : "0.00012 BTC",
-    "isFrozen" : true,
-    "note" : "333cvgf23132132132132131321321314rwrtdggfdddewq ewqasfdxgdhgfgfszczcxgbhhhbcgbc"},
-  <String, dynamic>{
-    "address" : "bc1qm80mu5p3mf04a7cj7teymasf04dwpc3av2fwtr",
-    "amount" : "0.00574 BTC",
-    "note" : "sffsfsdsgs"},
-  <String, dynamic>{
-    "address" : "bc1qm80mu5p3mf04a7cj7teymasf04dwpc3av2fwtr",
-    "amount" : "0.000482 BTC",
-    "isFrozen" : false},
-];
-
 class UnspentCoinsListViewModel = UnspentCoinsListViewModelBase with _$UnspentCoinsListViewModel;
 
 abstract class UnspentCoinsListViewModelBase with Store {
+  UnspentCoinsListViewModelBase({
+    @required WalletBase wallet,
+    @required Box<UnspentCoinsInfo> unspentCoinsInfo}) {
+    _unspentCoinsInfo = unspentCoinsInfo;
+    _wallet = wallet as ElectrumWallet;
+    _wallet.updateUnspent();
+  }
+
+  ElectrumWallet _wallet;
+  Box<UnspentCoinsInfo> _unspentCoinsInfo;
+
   @computed
   ObservableList<UnspentCoinsItem> get items =>
-      ObservableList.of(unspentCoinsMap.map((elem) =>
-        UnspentCoinsItem(
-          address: elem["address"] as String,
-          amount: elem["amount"] as String,
-          isFrozen: elem["isFrozen"] as bool,
-          note: elem["note"] as String
-      )));
+    ObservableList.of(_wallet.unspentCoins.map((elem) {
+      final amount = bitcoinAmountToString(amount: elem.value) +
+          ' ${_wallet.currency.title}';
+
+      return UnspentCoinsItem(
+          address: elem.address.address,
+          amount: amount,
+          hash: elem.hash,
+          isFrozen: elem.isFrozen,
+          note: elem.note,
+          isSending: elem.isSending
+      );
+    }));
+
+  Future<void> saveUnspentCoinInfo(UnspentCoinsItem item) async {
+    try {
+      final info = _unspentCoinsInfo.values
+          .firstWhere((element) => element.walletId.contains(_wallet.id) &&
+          element.hash.contains(item.hash));
+
+      info.isFrozen = item.isFrozen;
+      info.isSending = item.isSending;
+      info.note = item.note;
+
+      await info.save();
+      await _wallet.updateUnspent();
+    } catch (e) {
+      print(e.toString());
+    }
+  }
 }