CAKE-18 | created fiat convertation service and fiat convertation store; added calculating price to bootstrap; applied fiat convertation store to balance view model

lib/di.dart

@@ -12,7 +12,6 @@ import 'package:cake_wallet/src/screens/wallet_keys/wallet_keys_page.dart';
 import 'package:cake_wallet/store/contact_list_store.dart';
 import 'package:cake_wallet/store/node_list_store.dart';
 import 'package:cake_wallet/store/settings_store.dart';
-import 'package:cake_wallet/src/stores/price/price_store.dart';
 import 'package:cake_wallet/core/auth_service.dart';
 import 'package:cake_wallet/core/key_service.dart';
 import 'package:cake_wallet/monero/monero_wallet.dart';
@@ -57,6 +56,7 @@ import 'package:cake_wallet/store/authentication_store.dart';
 import 'package:cake_wallet/store/dashboard/trades_store.dart';
 import 'package:cake_wallet/store/dashboard/trade_filter_store.dart';
 import 'package:cake_wallet/store/dashboard/transaction_filter_store.dart';
+import 'package:cake_wallet/store/dashboard/fiat_convertation_store.dart';
 
 final getIt = GetIt.instance;
 
@@ -83,8 +83,7 @@ Future setup(
     {Box<WalletInfo> walletInfoSource,
     Box<Node> nodeSource,
     Box<Contact> contactSource,
-    Box<Trade> tradesSource,
-    PriceStore priceStore}) async {
+    Box<Trade> tradesSource}) async {
   getIt.registerSingletonAsync<SharedPreferences>(
       () => SharedPreferences.getInstance());
 
@@ -110,6 +109,7 @@ Future setup(
   getIt.registerSingleton<TradeFilterStore>(
       TradeFilterStore(wallet: getIt.get<AppStore>().wallet));
   getIt.registerSingleton<TransactionFilterStore>(TransactionFilterStore());
+  getIt.registerSingleton<FiatConvertationStore>(FiatConvertationStore());
 
   getIt.registerFactory<KeyService>(
       () => KeyService(getIt.get<FlutterSecureStorage>()));
@@ -145,7 +145,7 @@ Future setup(
       () => BalanceViewModel(
             wallet: getIt.get<AppStore>().wallet,
             settingsStore: getIt.get<SettingsStore>(),
-            priceStore: priceStore));
+            fiatConvertationStore: getIt.get<FiatConvertationStore>()));
 
   getIt.registerFactory(
       () => DashboardViewModel(

lib/main.dart

@@ -47,6 +47,7 @@ import 'package:cake_wallet/src/domain/common/wallet_type.dart';
 import 'package:cake_wallet/src/domain/common/template.dart';
 import 'package:cake_wallet/src/domain/exchange/exchange_template.dart';
 import 'package:cake_wallet/src/domain/services/wallet_service.dart';
+import 'package:cake_wallet/src/domain/services/fiat_convertation_service.dart';
 import 'package:cake_wallet/generated/i18n.dart';
 import 'package:cake_wallet/src/domain/common/language.dart';
 import 'package:cake_wallet/src/stores/seed_language/seed_language_store.dart';
@@ -87,6 +88,7 @@ void main() async {
 
   final sharedPreferences = await SharedPreferences.getInstance();
   final walletService = WalletService();
+  final fiatConvertationService = FiatConvertationService();
   final walletListService = WalletListService(
       secureStorage: secureStorage,
       walletInfoSource: walletInfoSource,
@@ -124,7 +126,7 @@ void main() async {
       walletInfoSource: walletInfoSource,
       contactSource: contacts,
       tradesSource: trades,
-      priceStore: priceStore,
+      fiatConvertationService: fiatConvertationService,
       initialMigrationVersion: 3);
 
   setReactions(
@@ -166,7 +168,7 @@ Future<void> initialSetup(
     @required Box<WalletInfo> walletInfoSource,
     @required Box<Contact> contactSource,
     @required  Box<Trade> tradesSource,
-    @required PriceStore priceStore,
+    @required FiatConvertationService fiatConvertationService,
       int initialMigrationVersion = 3}) async {
   await defaultSettingsMigration(
       version: initialMigrationVersion,
@@ -176,9 +178,8 @@ Future<void> initialSetup(
       walletInfoSource: walletInfoSource,
       nodeSource: nodes,
       contactSource: contactSource,
-      tradesSource: tradesSource,
-      priceStore: priceStore);
-  await bootstrap();
+      tradesSource: tradesSource);
+  await bootstrap(fiatConvertationService: fiatConvertationService);
   monero_wallet.onStartup();
 }
 

lib/reactions/bootstrap.dart

@@ -10,10 +10,14 @@ import 'package:cake_wallet/monero/monero_wallet_service.dart';
 import 'package:cake_wallet/core/wallet_base.dart';
 import 'package:cake_wallet/core/wallet_service.dart';
 import 'package:cake_wallet/store/app_store.dart';
+import 'package:cake_wallet/store/settings_store.dart';
 import 'package:cake_wallet/store/authentication_store.dart';
 import 'package:cake_wallet/src/domain/common/wallet_type.dart';
 import 'package:cake_wallet/src/domain/common/secret_store_key.dart';
 import 'package:cake_wallet/src/domain/common/encrypt.dart';
+import 'package:cake_wallet/src/domain/services/fiat_convertation_service.dart';
+import 'package:cake_wallet/src/domain/common/fiat_currency.dart';
+import 'package:cake_wallet/store/dashboard/fiat_convertation_store.dart';
 
 // FIXME: move me
 Future<void> loadCurrentWallet() async {
@@ -44,9 +48,12 @@ Future<void> loadCurrentWallet() async {
 ReactionDisposer _initialAuthReaction;
 ReactionDisposer _onCurrentWalletChangeReaction;
 ReactionDisposer _onWalletSyncStatusChangeReaction;
+ReactionDisposer _onCurrentFiatCurrencyChangeDisposer;
 
-Future<void> bootstrap() async {
+Future<void> bootstrap({FiatConvertationService fiatConvertationService}) async {
   final authenticationStore = getIt.get<AuthenticationStore>();
+  final settingsStore = getIt.get<SettingsStore>();
+  final fiatConvertationStore = getIt.get<FiatConvertationStore>();
 
   if (authenticationStore.state == AuthenticationState.uninitialized) {
     authenticationStore.state =
@@ -81,5 +88,30 @@ Future<void> bootstrap() async {
         .setInt('current_wallet_type', serializeToInt(wallet.type));
 
     await wallet.connectToNode(node: null);
+
+    final cryptoCurrency = wallet.currency;
+    final fiatCurrency = settingsStore.fiatCurrency;
+
+    final price = await fiatConvertationService.getPrice(
+      crypto: cryptoCurrency,
+      fiat: fiatCurrency
+    );
+
+    fiatConvertationStore.setPrice(price);
+  });
+
+  //
+
+  _onCurrentFiatCurrencyChangeDisposer ??=
+  reaction((_) => settingsStore.fiatCurrency,
+          (FiatCurrency fiatCurrency) async {
+    final cryptoCurrency = getIt.get<AppStore>().wallet.currency;
+
+    final price = await fiatConvertationService.getPrice(
+      crypto: cryptoCurrency,
+      fiat: fiatCurrency
+    );
+
+    fiatConvertationStore.setPrice(price);
   });
 }

lib/src/domain/services/fiat_convertation_service.dart

@@ -0,0 +1,10 @@
+import 'dart:async';
+import 'package:cake_wallet/src/domain/common/fiat_currency.dart';
+import 'package:cake_wallet/src/domain/common/crypto_currency.dart';
+import 'package:cake_wallet/src/domain/common/fetch_price.dart';
+
+class FiatConvertationService {
+  Future<double> getPrice({CryptoCurrency crypto, FiatCurrency fiat}) async {
+    return await fetchPriceFor(crypto: crypto, fiat: fiat);
+  }
+}

lib/store/dashboard/fiat_convertation_store.dart

@@ -0,0 +1,19 @@
+import 'package:mobx/mobx.dart';
+
+part 'fiat_convertation_store.g.dart';
+
+class FiatConvertationStore = FiatConvertationStoreBase with _$FiatConvertationStore;
+
+abstract class FiatConvertationStoreBase with Store {
+  FiatConvertationStoreBase() {
+    setPrice(0.0);
+  }
+
+  @observable
+  double price;
+
+  @action
+  void setPrice(double price) {
+    this.price = price;
+  }
+}

lib/view_model/dashboard/balance_view_model.dart

@@ -3,10 +3,9 @@ import 'package:cake_wallet/core/wallet_base.dart';
 import 'package:cake_wallet/monero/monero_wallet.dart';
 import 'package:cake_wallet/src/domain/common/balance_display_mode.dart';
 import 'package:cake_wallet/src/domain/common/calculate_fiat_amount.dart';
-import 'package:cake_wallet/src/domain/common/crypto_currency.dart';
 import 'package:cake_wallet/view_model/dashboard/wallet_balance.dart';
 import 'package:cake_wallet/store/settings_store.dart';
-import 'package:cake_wallet/src/stores/price/price_store.dart';
+import 'package:cake_wallet/store/dashboard/fiat_convertation_store.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:mobx/mobx.dart';
 
@@ -18,12 +17,12 @@ abstract class BalanceViewModelBase with Store {
   BalanceViewModelBase({
     @required this.wallet,
     @required this.settingsStore,
-    @required this.priceStore
+    @required this.fiatConvertationStore
   });
 
   final WalletBase wallet;
   final SettingsStore settingsStore;
-  final PriceStore priceStore;
+  final FiatConvertationStore fiatConvertationStore;
 
   WalletBalance _getWalletBalance() {
     final _wallet = wallet;
@@ -50,22 +49,7 @@ abstract class BalanceViewModelBase with Store {
   }
 
   @computed
-  double get price {
-    String symbol;
-    final _wallet = wallet;
-
-    if (_wallet is MoneroWallet) {
-      symbol = PriceStoreBase.generateSymbolForPair(
-          fiat: settingsStore.fiatCurrency, crypto: CryptoCurrency.xmr);
-    }
-
-    if (_wallet is BitcoinWallet) {
-      symbol = PriceStoreBase.generateSymbolForPair(
-          fiat: settingsStore.fiatCurrency, crypto: CryptoCurrency.btc);
-    }
-
-    return priceStore.prices[symbol];
-  }
+  double get price => fiatConvertationStore.price;
 
   @computed
   String get cryptoBalance {