add an entry for “Historical fiat rate”

lib/core/fiat_conversion_service.dart

@@ -5,7 +5,6 @@ import 'package:flutter/foundation.dart';
 import 'package:http/http.dart';
 import 'package:cake_wallet/.secrets.g.dart' as secrets;
 
-
 const _fiatApiClearNetAuthority = 'fiat-api.cakewallet.com';
 const _fiatApiOnionAuthority = 'n4z7bdcmwk2oyddxvzaap3x2peqcplh3pzdy7tpkk5ejz5n4mhfvoxqd.onion';
 const _fiatApiPath = '/v2/rates';
@@ -19,7 +18,7 @@ Future<double> _fetchPrice(Map<String, dynamic> args) async {
     'interval_count': '1',
     'base': crypto.toString(),
     'quote': fiat.toString(),
-    'key' : secrets.fiatApiKey,
+    'key': secrets.fiatApiKey,
   };
 
   double price = 0.0;
@@ -51,9 +50,65 @@ Future<double> _fetchPrice(Map<String, dynamic> args) async {
   }
 }
 
+Future<double> _fetchHistoricalPrice(Map<String, dynamic> args) async {
+  final crypto = args['crypto'] as CryptoCurrency;
+  final fiat = args['fiat'] as FiatCurrency;
+  final torOnly = args['torOnly'] as bool;
+  final date = args['date'] as DateTime;
+  final intervalFromNow = DateTime.now().difference(date).inMinutes;
+
+  final Map<String, String> queryParams = {
+    'interval_count': '5',
+    'base': crypto.toString(),
+    'quote': fiat.toString(),
+    'key': secrets.fiatApiKey,
+    'interval_minutes': intervalFromNow.toString()
+  };
+
+  double price = 0.0;
+
+  try {
+    late final Uri uri;
+    if (torOnly) {
+      uri = Uri.http(_fiatApiOnionAuthority, _fiatApiPath, queryParams);
+    } else {
+      uri = Uri.https(_fiatApiClearNetAuthority, _fiatApiPath, queryParams);
+    }
+
+    final response = await get(uri);
+
+    if (response.statusCode != 200) {
+      return 0.0;
+    }
+
+    final data = json.decode(response.body) as Map<String, dynamic>;
+    final errors = data['errors'] as Map<String, dynamic>;
+
+    if (errors.isNotEmpty) {
+      return 0.0;
+    }
+
+    final results = data['results'] as Map<String, dynamic>;
+
+    if (results.isNotEmpty) {
+      price = results.values.first as double;
+    }
+
+    return price;
+  } catch (e) {
+    print(e.toString());
+    return 0.0;
+  }
+}
+
 Future<double> _fetchPriceAsync(CryptoCurrency crypto, FiatCurrency fiat, bool torOnly) async =>
     compute(_fetchPrice, {'fiat': fiat, 'crypto': crypto, 'torOnly': torOnly});
 
+Future<double> _fetchHistoricalAsync(
+        CryptoCurrency crypto, FiatCurrency fiat, bool torOnly, DateTime date) async =>
+    compute(
+        _fetchHistoricalPrice, {'fiat': fiat, 'crypto': crypto, 'torOnly': torOnly, 'date': date});
+
 class FiatConversionService {
   static Future<double> fetchPrice({
     required CryptoCurrency crypto,
@@ -61,4 +116,12 @@ class FiatConversionService {
     required bool torOnly,
   }) async =>
       await _fetchPriceAsync(crypto, fiat, torOnly);
+
+  static Future<double> fetchHistoricalPrice({
+    required CryptoCurrency crypto,
+    required FiatCurrency fiat,
+    required bool torOnly,
+    required DateTime date,
+  }) async =>
+      await _fetchHistoricalAsync(crypto, fiat, torOnly, date);
 }

lib/entities/preferences_key.dart

@@ -45,4 +45,5 @@ class PreferencesKey {
   static const lastSeenAppVersion = 'last_seen_app_version';
   static const shouldShowMarketPlaceInDashboard = 'should_show_marketplace_in_dashboard';
   static const isNewInstall = 'is_new_install';
+  static const showHistoricalFiatRateKey = 'show_historical_fiat_rate';
 }

lib/src/screens/settings/display_settings_page.dart

@@ -56,6 +56,13 @@ class DisplaySettingsPage extends BasePage {
                       currency.fullName.toLowerCase().contains(searchText);
                 },
               ),
+            SettingsSwitcherCell(
+              title: S.current.historical_fiat_rate,
+              value: _displaySettingsViewModel.showHistoricalFiatRate,
+              onValueChange: (_, bool value) {
+                _displaySettingsViewModel.setShowHistoricalFiatRate(value);
+              },
+            ),
             SettingsPickerCell<String>(
               title: S.current.settings_change_language,
               searchHintText: S.current.search_language,

lib/src/screens/transaction_details/transaction_details_page.dart

@@ -11,6 +11,7 @@ import 'package:cake_wallet/src/screens/transaction_details/blockexplorer_list_i
 import 'package:cake_wallet/src/screens/transaction_details/standart_list_item.dart';
 import 'package:cake_wallet/src/screens/base_page.dart';
 import 'package:cake_wallet/utils/date_formatter.dart';
+import 'package:flutter_mobx/flutter_mobx.dart';
 
 import 'package:url_launcher/url_launcher.dart';
 
@@ -27,6 +28,8 @@ class TransactionDetailsPage extends BasePage {
   @override
   Widget body(BuildContext context) {
     // FIX-ME: Added `context` it was not used here before, maby bug ?
+    return Observer(
+        builder: (_) {
       return SectionStandardList(
         context: context,
         sectionCount: 1,
@@ -63,6 +66,6 @@ class TransactionDetailsPage extends BasePage {
           }
 
           return Container();
-        });
+        });});
   }
 }

lib/store/settings_store.dart

@@ -36,6 +36,7 @@ abstract class SettingsStoreBase with Store {
       required bool initialAppSecure,
       required FiatApiMode initialFiatMode,
       required bool initialAllowBiometricalAuthentication,
+      required bool initialShowHistoricalFiatRate,
       required ExchangeApiMode initialExchangeStatus,
       required ThemeBase initialTheme,
       required int initialPinLength,
@@ -59,6 +60,7 @@ abstract class SettingsStoreBase with Store {
         isAppSecure = initialAppSecure,
     fiatApiMode = initialFiatMode,
     allowBiometricalAuthentication = initialAllowBiometricalAuthentication,
+        showHistoricalFiatRate = initialShowHistoricalFiatRate,
         shouldShowMarketPlaceInDashboard = initialShouldShowMarketPlaceInDashboard,
     exchangeStatus = initialExchangeStatus,
     currentTheme = initialTheme,
@@ -150,6 +152,12 @@ abstract class SettingsStoreBase with Store {
             PreferencesKey.allowBiometricalAuthenticationKey,
             biometricalAuthentication));
 
+    reaction(
+            (_) => showHistoricalFiatRate,
+            (bool historicalFiatRate) => sharedPreferences.setBool(
+            PreferencesKey.showHistoricalFiatRateKey,
+                historicalFiatRate));
+
     reaction(
         (_) => shouldShowMarketPlaceInDashboard,
         (bool value) =>
@@ -220,6 +228,9 @@ abstract class SettingsStoreBase with Store {
   @observable
   bool allowBiometricalAuthentication;
 
+  @observable
+  bool showHistoricalFiatRate;
+
   @observable
   ExchangeApiMode exchangeStatus;
 
@@ -315,6 +326,9 @@ abstract class SettingsStoreBase with Store {
     final allowBiometricalAuthentication = sharedPreferences
             .getBool(PreferencesKey.allowBiometricalAuthenticationKey) ??
         false;
+    final showHistoricalFiatRate = sharedPreferences
+        .getBool(PreferencesKey.showHistoricalFiatRateKey) ??
+        false;
     final shouldShowMarketPlaceInDashboard =
         sharedPreferences.getBool(PreferencesKey.shouldShowMarketPlaceInDashboard) ?? true;
     final exchangeStatus = ExchangeApiMode.deserialize(
@@ -390,6 +404,7 @@ abstract class SettingsStoreBase with Store {
         initialAppSecure: isAppSecure,
         initialFiatMode: currentFiatApiMode,
         initialAllowBiometricalAuthentication: allowBiometricalAuthentication,
+        initialShowHistoricalFiatRate: showHistoricalFiatRate,
         initialExchangeStatus: exchangeStatus,
         initialTheme: savedTheme,
         actionlistDisplayMode: actionListDisplayMode,
@@ -438,6 +453,9 @@ abstract class SettingsStoreBase with Store {
     allowBiometricalAuthentication = sharedPreferences
         .getBool(PreferencesKey.allowBiometricalAuthenticationKey) ??
         allowBiometricalAuthentication;
+    showHistoricalFiatRate = sharedPreferences
+        .getBool(PreferencesKey.showHistoricalFiatRateKey) ??
+        showHistoricalFiatRate;
     shouldShowMarketPlaceInDashboard =
         sharedPreferences.getBool(PreferencesKey.shouldShowMarketPlaceInDashboard) ??
             shouldShowMarketPlaceInDashboard;

lib/view_model/settings/display_settings_view_model.dart

@@ -37,6 +37,9 @@ abstract class DisplaySettingsViewModelBase with Store {
   @computed
   bool get disabledFiatApiMode => _settingsStore.fiatApiMode == FiatApiMode.disabled;
 
+  @computed
+  bool get showHistoricalFiatRate => _settingsStore.showHistoricalFiatRate;
+
   @action
   void setBalanceDisplayMode(BalanceDisplayMode value) => _settingsStore.balanceDisplayMode = value;
 
@@ -66,4 +69,7 @@ abstract class DisplaySettingsViewModelBase with Store {
   void setShouldShowMarketPlaceInDashbaord(bool value) {
     _settingsStore.shouldShowMarketPlaceInDashboard = value;
   }
+
+  @action
+  void setShowHistoricalFiatRate(bool value) => _settingsStore.showHistoricalFiatRate = value;
 }

lib/view_model/transaction_details_view_model.dart

@@ -1,3 +1,6 @@
+import 'package:cake_wallet/entities/fiat_api_mode.dart';
+import 'package:cw_bitcoin/bitcoin_amount_format.dart';
+import 'package:cw_core/monero_amount_format.dart';
 import 'package:cw_core/wallet_base.dart';
 import 'package:cw_core/transaction_info.dart';
 import 'package:cw_core/wallet_type.dart';
@@ -14,6 +17,7 @@ import 'package:cake_wallet/store/settings_store.dart';
 import 'package:cake_wallet/generated/i18n.dart';
 import 'package:url_launcher/url_launcher.dart';
 import 'package:cake_wallet/monero/monero.dart';
+import 'package:cake_wallet/core/fiat_conversion_service.dart';
 
 part 'transaction_details_view_model.g.dart';
 
@@ -26,9 +30,16 @@ abstract class TransactionDetailsViewModelBase with Store {
       required this.transactionDescriptionBox,
       required this.wallet,
       required this.settingsStore})
-      : items = [],
+      : items = ObservableList<TransactionDetailsListItem>(),
       isRecipientAddressShown = false,
-      showRecipientAddress = settingsStore.shouldSaveRecipientAddress {
+      showRecipientAddress = settingsStore.shouldSaveRecipientAddress,
+        fiatRateListItem = StandartListItem(
+            title: settingsStore.showHistoricalFiatRate
+                ? S.current.historical_fiat_rate
+                : S.current.fiat_rate,
+            value: settingsStore.showHistoricalFiatRate
+                ? '${S.current.fetching.toLowerCase()} ...'
+                : transactionInfo.fiatAmount() + ' ${settingsStore.fiatCurrency}') {
     final dateFormat = DateFormatter.withCurrentLocal();
     final tx = transactionInfo;
 
@@ -51,6 +62,8 @@ abstract class TransactionDetailsViewModelBase with Store {
         if (feeFormatted != null)
           StandartListItem(
             title: S.current.transaction_details_fee, value: feeFormatted),
+        if (settingsStore.fiatApiMode != FiatApiMode.disabled)
+        fiatRateListItem,
         if (key?.isNotEmpty ?? false)
           StandartListItem(title: S.current.transaction_key, value: key!)
       ];
@@ -105,6 +118,8 @@ abstract class TransactionDetailsViewModelBase with Store {
           StandartListItem(
               title: S.current.transaction_details_fee,
               value: tx.feeFormatted()!),
+        if (settingsStore.fiatApiMode != FiatApiMode.disabled)
+          fiatRateListItem,
       ];
 
       items.addAll(_items);
@@ -125,6 +140,8 @@ abstract class TransactionDetailsViewModelBase with Store {
         if (tx.feeFormatted()?.isNotEmpty ?? false)
           StandartListItem(
             title: S.current.transaction_details_fee, value: tx.feeFormatted()!),
+        if (settingsStore.fiatApiMode != FiatApiMode.disabled)
+          fiatRateListItem,
       ]);
     }
 
@@ -171,17 +188,54 @@ abstract class TransactionDetailsViewModelBase with Store {
             transactionDescriptionBox.add(description);
           }
         }));
+    if (settingsStore.showHistoricalFiatRate) {
+      getHistoricalFiatRate();
+    }
   }
 
   final TransactionInfo transactionInfo;
   final Box<TransactionDescription> transactionDescriptionBox;
   final SettingsStore settingsStore;
   final WalletBase wallet;
+  final StandartListItem fiatRateListItem;
 
-  final List<TransactionDetailsListItem> items;
+  final ObservableList<TransactionDetailsListItem> items;
   bool showRecipientAddress;
   bool isRecipientAddressShown;
 
+  @action
+  Future<void> getHistoricalFiatRate() async {
+    final fiatRateItemIndex = items.indexWhere((element) => element == fiatRateListItem);
+    if (fiatRateItemIndex == -1) return;
+
+    final fiat = settingsStore.fiatCurrency;
+
+    final historicalFiatRate = await FiatConversionService.fetchHistoricalPrice(
+        crypto: wallet.currency,
+        fiat: fiat,
+        torOnly: settingsStore.fiatApiMode == FiatApiMode.torOnly,
+        date: transactionInfo.date);
+    var formattedFiatAmount = 0.0;
+    switch (wallet.type) {
+      case WalletType.bitcoin:
+      case WalletType.litecoin:
+        formattedFiatAmount = bitcoinAmountToDouble(amount: transactionInfo.amount);
+        break;
+      case WalletType.monero:
+      case WalletType.haven:
+        formattedFiatAmount = moneroAmountToDouble(amount: transactionInfo.amount);
+        break;
+      default:
+        formattedFiatAmount;
+    }
+    final historicalFiatAmountFormatted = formattedFiatAmount * historicalFiatRate;
+    items[fiatRateItemIndex] = StandartListItem(
+        title: S.current.historical_fiat_rate,
+        value: historicalFiatAmountFormatted > 0.0
+            ? historicalFiatAmountFormatted.toStringAsFixed(2) + ' ${fiat}'
+            : 'no historical data');
+  }
+
   String _explorerUrl(WalletType type, String txId) {
     switch (type) {
       case WalletType.monero:

res/values/strings_en.arb

@@ -708,5 +708,7 @@
   "error_text_input_below_minimum_limit" : "Amount is less than the minimum",
   "error_text_input_above_maximum_limit" : "Amount is more than the maximum",
   "show_market_place" :"Show Marketplace",
-  "prevent_screenshots": "Prevent screenshots and screen recording"
+  "prevent_screenshots": "Prevent screenshots and screen recording",
+  "fiat_rate": "Fiat rate",
+  "historical_fiat_rate": "Historical fiat rate"
 }