Add trocador exchange provider

lib/entities/preferences_key.dart

@@ -13,6 +13,7 @@ class PreferencesKey {
   static const allowBiometricalAuthenticationKey =
       'allow_biometrical_authentication';
   static const disableExchangeKey = 'disable_exchange';
+  static const exchangeStatusKey = 'exchange_status';
   static const currentTheme = 'current_theme';
   static const isDarkThemeLegacy = 'dark_theme';
   static const displayActionListModeKey = 'display_list_mode';

lib/exchange/changenow/changenow_exchange_provider.dart

@@ -269,6 +269,7 @@ class ChangeNowExchangeProvider extends ExchangeProvider {
             : currency.title.toLowerCase();
       }
     }
+
   }
 
    String normalizeCryptoCurrency(CryptoCurrency currency) {

lib/exchange/exchange_provider.dart

@@ -14,6 +14,7 @@ abstract class ExchangeProvider {
   bool get isAvailable;
   bool get isEnabled;
   bool get supportsFixedRate;
+  bool get shouldUseOnionAddress => false;
 
   @override
   String toString() => title;

lib/exchange/exchange_provider_description.dart

@@ -1,31 +1,30 @@
 import 'package:cw_core/enumerable_item.dart';
 
-class ExchangeProviderDescription extends EnumerableItem<int>
+class ExchangeProviderDescription extends EnumerableItem<int> with Serializable<int> {
-    with Serializable<int> {
+  const ExchangeProviderDescription(
-  const ExchangeProviderDescription({
+      {required String title, required int raw, required this.image, this.horizontalLogo = false})
-    required String title,
-    required int raw,
-    required this.image,
-    this.horizontalLogo = false})
       : super(title: title, raw: raw);
 
   final bool horizontalLogo;
   final String image;
 
-  static const xmrto = ExchangeProviderDescription(title: 'XMR.TO', raw: 0, image: 'assets/images/xmrto.png');
+  static const xmrto =
+      ExchangeProviderDescription(title: 'XMR.TO', raw: 0, image: 'assets/images/xmrto.png');
   static const changeNow =
       ExchangeProviderDescription(title: 'ChangeNOW', raw: 1, image: 'assets/images/changenow.png');
   static const morphToken =
       ExchangeProviderDescription(title: 'MorphToken', raw: 2, image: 'assets/images/morph.png');
 
-   static const sideShift =
+  static const sideShift =
       ExchangeProviderDescription(title: 'SideShift', raw: 3, image: 'assets/images/sideshift.png');
 
-  static const simpleSwap =
+  static const simpleSwap = ExchangeProviderDescription(
-      ExchangeProviderDescription(title: 'SimpleSwap', raw: 4, image: 'assets/images/simpleSwap.png');
+      title: 'SimpleSwap', raw: 4, image: 'assets/images/simpleSwap.png');
 
-  static const all =
+  static const trocador =
-      ExchangeProviderDescription(title: 'All trades', raw: 5, image:'');
+      ExchangeProviderDescription(title: 'Trocador', raw: 5, image: 'assets/images/trocador.png');
+
+  static const all = ExchangeProviderDescription(title: 'All trades', raw: 6, image: '');
 
   static ExchangeProviderDescription deserialize({required int raw}) {
     switch (raw) {
@@ -40,6 +39,8 @@ class ExchangeProviderDescription extends EnumerableItem<int>
       case 4:
         return simpleSwap;
       case 5:
+        return trocador;
+      case 6:
         return all;
       default:
         throw Exception('Unexpected token: $raw for ExchangeProviderDescription deserialize');

lib/exchange/trocador/trocador_exchange_provider.dart

@@ -0,0 +1,268 @@
+import 'dart:convert';
+
+import 'package:cake_wallet/exchange/exchange_pair.dart';
+import 'package:cake_wallet/exchange/exchange_provider.dart';
+import 'package:cake_wallet/exchange/trade_state.dart';
+import 'package:cake_wallet/exchange/trocador/trocador_request.dart';
+import 'package:cw_core/crypto_currency.dart';
+import 'package:cake_wallet/exchange/trade_request.dart';
+import 'package:cake_wallet/exchange/trade.dart';
+import 'package:cake_wallet/exchange/limits.dart';
+import 'package:cake_wallet/exchange/exchange_provider_description.dart';
+import 'package:cake_wallet/.secrets.g.dart' as secrets;
+import 'package:http/http.dart';
+
+class TrocadorExchangeProvider extends ExchangeProvider {
+  TrocadorExchangeProvider()
+      : _lastUsedRateId = '',
+        super(pairList: _supportedPairs());
+
+  static const List<CryptoCurrency> _notSupported = [
+    CryptoCurrency.xhv,
+    CryptoCurrency.dcr,
+    CryptoCurrency.oxt,
+    CryptoCurrency.pivx,
+    CryptoCurrency.scrt,
+    CryptoCurrency.stx,
+    CryptoCurrency.bttc,
+    CryptoCurrency.zaddr,
+    CryptoCurrency.usdcpoly,
+    CryptoCurrency.maticpoly,
+  ];
+
+  static List<ExchangePair> _supportedPairs() {
+    final supportedCurrencies =
+        CryptoCurrency.all.where((element) => !_notSupported.contains(element)).toList();
+
+    return supportedCurrencies
+        .map((i) => supportedCurrencies.map((k) => ExchangePair(from: i, to: k, reverse: true)))
+        .expand((i) => i)
+        .toList();
+  }
+
+  static const onionApiAuthority = 'trocadorfyhlu27aefre5u7zri66gudtzdyelymftvr4yjwcxhfaqsid.onion';
+  static const clearNetAuthority = 'trocador.app';
+  static const apiKey = secrets.trocadorApiKey;
+  static const newRatePath = '/api/new_rate';
+  static const createTradePath = 'api/new_trade';
+  static const tradePath = 'api/trade';
+  String _lastUsedRateId;
+
+  @override
+  Future<bool> checkIsAvailable() async => true;
+
+  @override
+  Future<Trade> createTrade({required TradeRequest request, required bool isFixedRateMode}) {
+    final _request = request as TrocadorRequest;
+    return _createTrade(request: _request, isFixedRateMode: isFixedRateMode);
+  }
+
+  Future<Trade> _createTrade({
+    required TrocadorRequest request,
+    required bool isFixedRateMode,
+  }) async {
+    final params = <String, String>{
+      'api_key': apiKey,
+      'ticker_from': request.from.title.toLowerCase(),
+      'ticker_to': request.to.title.toLowerCase(),
+      'network_from': _networkFor(request.from),
+      'network_to': _networkFor(request.to),
+      'payment': isFixedRateMode ? 'True' : 'False',
+      'min_kycrating': 'C',
+      'markup': '3',
+      'best_only': 'True',
+      if (!isFixedRateMode) 'amount_from': request.fromAmount,
+      if (isFixedRateMode) 'amount_to': request.toAmount,
+      'address': request.address,
+      'refund': request.refundAddress
+    };
+
+    if (isFixedRateMode) {
+      await fetchRate(
+        from: request.from,
+        to: request.to,
+        amount: double.tryParse(request.toAmount) ?? 0,
+        isFixedRateMode: true,
+        isReceiveAmount: true,
+      );
+      params['id'] = _lastUsedRateId;
+    }
+
+    final String apiAuthority = shouldUseOnionAddress ? await _getAuthority() : clearNetAuthority;
+
+    final uri = Uri.https(apiAuthority, createTradePath, params);
+    final response = await get(uri);
+
+    if (response.statusCode == 400) {
+      final responseJSON = json.decode(response.body) as Map<String, dynamic>;
+      final error = responseJSON['error'] as String;
+      final message = responseJSON['message'] as String;
+      throw Exception('${error}\n$message');
+    }
+
+    if (response.statusCode != 200) {
+      throw Exception('Unexpected http status: ${response.statusCode}');
+    }
+
+    final responseJSON = json.decode(response.body) as Map<String, dynamic>;
+    final id = responseJSON['trade_id'] as String;
+    final inputAddress = responseJSON['address_provider'] as String;
+    final refundAddress = responseJSON['refund_address'] as String;
+    final status = responseJSON['status'] as String;
+    final state = TradeState.deserialize(raw: status);
+    final payoutAddress = responseJSON['address_user'] as String;
+    final date = responseJSON['date'] as String;
+
+    return Trade(
+        id: id,
+        from: request.from,
+        to: request.to,
+        provider: description,
+        inputAddress: inputAddress,
+        refundAddress: refundAddress,
+        state: state,
+        createdAt: DateTime.tryParse(date)?.toLocal(),
+        amount: responseJSON['amount_from']?.toString() ?? request.fromAmount,
+        payoutAddress: payoutAddress);
+  }
+
+  @override
+  ExchangeProviderDescription get description => ExchangeProviderDescription.trocador;
+
+  @override
+  Future<Limits> fetchLimits(
+      {required CryptoCurrency from,
+      required CryptoCurrency to,
+      required bool isFixedRateMode}) async {
+    //TODO: implement limits from trocador api
+    return Limits(
+      min: 0.0,
+    );
+  }
+
+  @override
+  Future<double> fetchRate(
+      {required CryptoCurrency from,
+      required CryptoCurrency to,
+      required double amount,
+      required bool isFixedRateMode,
+      required bool isReceiveAmount}) async {
+    try {
+      if (amount == 0) {
+        return 0.0;
+      }
+
+      final String apiAuthority = shouldUseOnionAddress ? await _getAuthority() : clearNetAuthority;
+
+      final params = <String, String>{
+        'api_key': apiKey,
+        'ticker_from': from.title.toLowerCase(),
+        'ticker_to': to.title.toLowerCase(),
+        'network_from': _networkFor(from),
+        'network_to': _networkFor(to),
+        'amount_from': amount.toString(),
+        'amount_to': amount.toString(),
+        'payment': isFixedRateMode ? 'True' : 'False',
+        'min_kycrating': 'C',
+        'markup': '3',
+        'best_only': 'True',
+      };
+
+      final uri = Uri.https(apiAuthority, newRatePath, params);
+      final response = await get(uri);
+      final responseJSON = json.decode(response.body) as Map<String, dynamic>;
+      final fromAmount = double.parse(responseJSON['amount_from'].toString());
+      final toAmount = double.parse(responseJSON['amount_to'].toString());
+      final rateId = responseJSON['trade_id'] as String? ?? '';
+
+      if (rateId.isNotEmpty) {
+        _lastUsedRateId = rateId;
+      }
+
+      return isReceiveAmount ? (amount / fromAmount) : (toAmount / amount);
+    } catch (e) {
+      print(e.toString());
+      return 0.0;
+    }
+  }
+
+  @override
+  Future<Trade> findTradeById({required String id}) async {
+    final String apiAuthority = shouldUseOnionAddress ? await _getAuthority() : clearNetAuthority;
+    final uri = Uri.https(apiAuthority, tradePath, {'api_key': apiKey, 'id': id});
+    return get(uri).then((response) {
+      if (response.statusCode != 200) {
+        throw Exception('Unexpected http status: ${response.statusCode}');
+      }
+
+      final responseListJson = json.decode(response.body) as List;
+
+      final responseJSON = responseListJson.first;
+      final id = responseJSON['trade_id'] as String;
+      final inputAddress = responseJSON['address_user'] as String;
+      final refundAddress = responseJSON['refund_address'] as String;
+      final payoutAddress = responseJSON['address_provider'] as String;
+      final fromAmount = responseJSON['amount_from']?.toString() ?? '0';
+      final from = CryptoCurrency.fromString(responseJSON['ticker_from'] as String);
+      final to = CryptoCurrency.fromString(responseJSON['ticker_to'] as String);
+      final state = TradeState.deserialize(raw: responseJSON['status'] as String);
+      final date = DateTime.parse(responseJSON['date'] as String);
+
+      return Trade(
+        id: id,
+        from: from,
+        to: to,
+        provider: description,
+        inputAddress: inputAddress,
+        refundAddress: refundAddress,
+        createdAt: date,
+        amount: fromAmount,
+        state: state,
+        payoutAddress: payoutAddress,
+      );
+    });
+  }
+
+  @override
+  bool get isAvailable => true;
+
+  @override
+  bool get isEnabled => true;
+
+  @override
+  bool get supportsFixedRate => true;
+
+  @override
+  bool get shouldUseOnionAddress => true;
+
+  @override
+  String get title => 'Trocador';
+
+  String _networkFor(CryptoCurrency currency) {
+    switch (currency) {
+      case CryptoCurrency.usdt:
+        return CryptoCurrency.btc.title.toLowerCase();
+      default:
+        return currency.tag != null ? _normalizeTag(currency.tag!) : 'Mainnet';
+    }
+  }
+
+  String _normalizeTag(String tag) {
+    switch (tag) {
+      case 'ETH':
+        return 'ERC20';
+      default:
+        return tag.toLowerCase();
+    }
+  }
+
+  Future<String> _getAuthority() async {
+    try {
+      final uri = Uri.https(onionApiAuthority, '/api/trade');
+      await get(uri);
+      return onionApiAuthority;
+    } catch (e) {
+      return clearNetAuthority;
+    }
+  }
+}

lib/exchange/trocador/trocador_request.dart

@@ -0,0 +1,21 @@
+import 'package:cake_wallet/exchange/trade_request.dart';
+import 'package:cw_core/crypto_currency.dart';
+
+class TrocadorRequest extends TradeRequest {
+  TrocadorRequest(
+      {required this.from,
+      required this.to,
+      required this.address,
+      required this.fromAmount,
+      required this.toAmount,
+      required this.refundAddress,
+      required this.isReverse});
+
+  CryptoCurrency from;
+  CryptoCurrency to;
+  String address;
+  String fromAmount;
+  String toAmount;
+  String refundAddress;
+  bool isReverse;
+}

lib/src/screens/dashboard/widgets/trade_row.dart

@@ -9,7 +9,8 @@ class TradeRow extends StatelessWidget {
     required this.to,
     required this.createdAtFormattedDate,
     this.onTap,
-    this.formattedAmount,});
+    this.formattedAmount,
+  });
 
   final VoidCallback? onTap;
   final ExchangeProviderDescription provider;
@@ -35,47 +36,40 @@ class TradeRow extends StatelessWidget {
               SizedBox(width: 12),
               Expanded(
                   child: Column(
-                    mainAxisSize: MainAxisSize.min,
+                mainAxisSize: MainAxisSize.min,
-                    children: [
+                children: [
-                      Row(
+                  Row(mainAxisAlignment: MainAxisAlignment.spaceBetween, children: <Widget>[
-                          mainAxisAlignment: MainAxisAlignment.spaceBetween,
+                    Text('${from.toString()} → ${to.toString()}',
-                          children: <Widget>[
+                        style: TextStyle(
-                            Text('${from.toString()} → ${to.toString()}',
+                            fontSize: 16,
-                                style: TextStyle(
+                            fontWeight: FontWeight.w500,
-                                    fontSize: 16,
+                            color: Theme.of(context).accentTextTheme!.headline2!.backgroundColor!)),
-                                    fontWeight: FontWeight.w500,
+                    formattedAmount != null
-                                    color: Theme.of(context).accentTextTheme!.headline2!.backgroundColor!
+                        ? Text(formattedAmount! + ' ' + amountCrypto,
-                                )),
+                            style: TextStyle(
-                            formattedAmount != null
+                                fontSize: 16,
-                                ? Text(formattedAmount! + ' ' + amountCrypto,
+                                fontWeight: FontWeight.w500,
-                                style: TextStyle(
+                                color:
-                                    fontSize: 16,
+                                    Theme.of(context).accentTextTheme!.headline2!.backgroundColor!))
-                                    fontWeight: FontWeight.w500,
+                        : Container()
-                                    color: Theme.of(context).accentTextTheme!.headline2!.backgroundColor!
+                  ]),
-                                ))
+                  SizedBox(height: 5),
-                                : Container()
+                  Row(mainAxisAlignment: MainAxisAlignment.spaceBetween, children: <Widget>[
-                          ]),
+                    if (createdAtFormattedDate != null)
-                      SizedBox(height: 5),
+                      Text(createdAtFormattedDate!,
-                      Row(
+                          style: TextStyle(
-                          mainAxisAlignment: MainAxisAlignment.spaceBetween,
+                              fontSize: 14,
-                          children: <Widget>[
+                              color: Theme.of(context).textTheme!.overline!.backgroundColor!))
-                            if (createdAtFormattedDate != null)
+                  ])
-                              Text(createdAtFormattedDate!,
+                ],
-                                  style: TextStyle(
+              ))
-                                      fontSize: 14,
-                                      color: Theme.of(context).textTheme!
-                                          .overline!.backgroundColor!))
-                          ])
-                    ],
-                  )
-              )
             ],
           ),
         ));
   }
 
-  Image? _getPoweredImage(ExchangeProviderDescription provider) {
+  Widget? _getPoweredImage(ExchangeProviderDescription provider) {
-    Image? image;
+    Widget? image;
 
     switch (provider) {
       case ExchangeProviderDescription.xmrto:
@@ -93,6 +87,11 @@ class TradeRow extends StatelessWidget {
       case ExchangeProviderDescription.simpleSwap:
         image = Image.asset('assets/images/simpleSwap.png', width: 36, height: 36);
         break;
+      case ExchangeProviderDescription.trocador:
+        image = ClipRRect(
+            borderRadius: BorderRadius.circular(50),
+            child: Image.asset('assets/images/trocador.png', width: 36, height: 36));
+        break;
       default:
         image = null;
     }

lib/src/screens/new_wallet/advanced_privacy_settings_page.dart

@@ -1,7 +1,11 @@
+import 'package:cake_wallet/entities/fiat_api_mode.dart';
 import 'package:cake_wallet/src/screens/nodes/widgets/node_form.dart';
+import 'package:cake_wallet/src/screens/settings/widgets/settings_choices_cell.dart';
 import 'package:cake_wallet/src/screens/settings/widgets/settings_switcher_cell.dart';
 import 'package:cake_wallet/view_model/node_list/node_create_or_edit_view_model.dart';
 import 'package:cake_wallet/view_model/advanced_privacy_settings_view_model.dart';
+import 'package:cake_wallet/view_model/settings/choices_list_item.dart';
+import 'package:cake_wallet/view_model/settings/switcher_list_item.dart';
 import 'package:flutter_mobx/flutter_mobx.dart';
 import 'package:flutter/material.dart';
 import 'package:cake_wallet/generated/i18n.dart';
@@ -48,9 +52,14 @@ class _AdvancedPrivacySettingsBodyState extends State<AdvancedPrivacySettingsBod
         content: Column(
           crossAxisAlignment: CrossAxisAlignment.center,
           children: [
-            ...widget.privacySettingsViewModel.settings.map(
+            ...widget.privacySettingsViewModel.settings.whereType<ChoicesListItem<FiatApiMode>>().map(
               (item) => Observer(
-                builder: (_) => SettingsSwitcherCell(
+                builder: (_) =>  SettingsChoicesCell(item)
+              ),
+            ),
+            ...widget.privacySettingsViewModel.settings.whereType<SwitcherListItem>().map(
+              (item) => Observer(
+                builder: (_) =>  SettingsSwitcherCell(
                   title: item.title,
                   value: item.value(),
                   onValueChange: item.onValueChange,

lib/src/screens/settings/privacy_page.dart

@@ -1,6 +1,9 @@
+import 'package:cake_wallet/entities/fiat_api_mode.dart';
 import 'package:cake_wallet/generated/i18n.dart';
 import 'package:cake_wallet/src/screens/base_page.dart';
+import 'package:cake_wallet/src/screens/settings/widgets/settings_choices_cell.dart';
 import 'package:cake_wallet/src/screens/settings/widgets/settings_switcher_cell.dart';
+import 'package:cake_wallet/view_model/settings/choices_list_item.dart';
 import 'package:cake_wallet/view_model/settings/privacy_settings_view_model.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_mobx/flutter_mobx.dart';
@@ -21,18 +24,22 @@ class PrivacyPage extends BasePage {
           return Column(
             mainAxisSize: MainAxisSize.min,
             children: [
-              SettingsSwitcherCell(
+              SettingsChoicesCell(
-                title: S.current.disable_fiat,
+                ChoicesListItem<FiatApiMode>(
-                value: _privacySettingsViewModel.isFiatDisabled,
+                  title: S.current.fiat_api,
-                onValueChange: (BuildContext context, bool value) {
+                  items: FiatApiMode.all,
-                  _privacySettingsViewModel.setFiatMode(value);
+                  selectedItem: _privacySettingsViewModel.fiatApi,
-                }),
+                  onItemSelected: (FiatApiMode mode) => _privacySettingsViewModel.setFiatMode(mode),
-              SettingsSwitcherCell(
+                ),
-                  title: S.current.disable_exchange,
+              ),
-                  value: _privacySettingsViewModel.disableExchange,
+              SettingsChoicesCell(
-                  onValueChange: (BuildContext context, bool value) {
+                ChoicesListItem<FiatApiMode>(
-                    _privacySettingsViewModel.setEnableExchange(value);
+                  title: S.current.exchange,
-                  }),
+                  items: FiatApiMode.all,
+                  selectedItem: _privacySettingsViewModel.exchangeStatus,
+                  onItemSelected: (FiatApiMode mode) => _privacySettingsViewModel.setEnableExchange(mode),
+                ),
+              ),
               SettingsSwitcherCell(
                   title: S.current.settings_save_recipient_address,
                   value: _privacySettingsViewModel.shouldSaveRecipientAddress,

lib/store/dashboard/trade_filter_store.dart

@@ -12,7 +12,8 @@ abstract class TradeFilterStoreBase with Store {
         displayChangeNow = true,
         displaySideShift = true,
         displayMorphToken = true,
-        displaySimpleSwap = true;
+        displaySimpleSwap = true,
+        displayTrocador = true;
 
   @observable
   bool displayXMRTO;
@@ -29,8 +30,11 @@ abstract class TradeFilterStoreBase with Store {
   @observable
   bool displaySimpleSwap;
 
+  @observable
+  bool displayTrocador;
+
   @computed
-  bool get displayAllTrades => displayChangeNow && displaySideShift && displaySimpleSwap;
+  bool get displayAllTrades => displayChangeNow && displaySideShift && displaySimpleSwap && displayTrocador;
 
   @action
   void toggleDisplayExchange(ExchangeProviderDescription provider) {
@@ -50,6 +54,9 @@ abstract class TradeFilterStoreBase with Store {
       case ExchangeProviderDescription.morphToken:
         displayMorphToken = !displayMorphToken;
         break;
+      case ExchangeProviderDescription.trocador:
+        displayTrocador = !displayTrocador;
+        break; 
       case ExchangeProviderDescription.all:
         if (displayAllTrades) {
           displayChangeNow = false;
@@ -57,12 +64,14 @@ abstract class TradeFilterStoreBase with Store {
           displayXMRTO = false;
           displayMorphToken = false;
           displaySimpleSwap = false;
+          displayTrocador = false;
         } else {
           displayChangeNow = true;
           displaySideShift = true;
           displayXMRTO = true;
           displayMorphToken = true;
           displaySimpleSwap = true;
+          displayTrocador = true;
         }
         break;
     }
@@ -88,7 +97,8 @@ abstract class TradeFilterStoreBase with Store {
                 ExchangeProviderDescription.morphToken)
         ||(displaySimpleSwap &&
             item.trade.provider ==
-                ExchangeProviderDescription.simpleSwap))
+                ExchangeProviderDescription.simpleSwap)
+        ||(displayTrocador && item.trade.provider == ExchangeProviderDescription.trocador))
         .toList()
         : _trades;
   }

lib/store/settings_store.dart

@@ -31,7 +31,7 @@ abstract class SettingsStoreBase with Store {
       required bool initialSaveRecipientAddress,
       required FiatApiMode initialFiatMode,
       required bool initialAllowBiometricalAuthentication,
-      required bool initialExchangeEnabled,
+      required FiatApiMode initialExchangeStatus,
       required ThemeBase initialTheme,
       required int initialPinLength,
       required String initialLanguageCode,
@@ -53,7 +53,7 @@ abstract class SettingsStoreBase with Store {
     shouldSaveRecipientAddress = initialSaveRecipientAddress,
     fiatApiMode = initialFiatMode,
     allowBiometricalAuthentication = initialAllowBiometricalAuthentication,
-    disableExchange = initialExchangeEnabled,
+    exchangeStatus = initialExchangeStatus,
     currentTheme = initialTheme,
     pinCodeLength = initialPinLength,
     languageCode = initialLanguageCode,
@@ -153,9 +153,9 @@ abstract class SettingsStoreBase with Store {
             PreferencesKey.currentBalanceDisplayModeKey, mode.serialize()));
 
     reaction(
-            (_) => disableExchange,
+            (_) => exchangeStatus,
-            (bool disableExchange) => sharedPreferences.setBool(
+            (FiatApiMode mode) => sharedPreferences.setInt(
-            PreferencesKey.disableExchangeKey, disableExchange));
+            PreferencesKey.exchangeStatusKey, mode.serialize()));
 
     this
         .nodes
@@ -192,7 +192,7 @@ abstract class SettingsStoreBase with Store {
   bool allowBiometricalAuthentication;
 
   @observable
-  bool disableExchange;
+  FiatApiMode exchangeStatus;
 
   @observable
   ThemeBase currentTheme;
@@ -284,8 +284,9 @@ abstract class SettingsStoreBase with Store {
     final allowBiometricalAuthentication = sharedPreferences
             .getBool(PreferencesKey.allowBiometricalAuthenticationKey) ??
         false;
-    final disableExchange = sharedPreferences
+    final exchangeStatus = FiatApiMode.deserialize(
-            .getBool(PreferencesKey.disableExchangeKey) ?? false;
+        raw: sharedPreferences
+            .getInt(PreferencesKey.exchangeStatusKey) ?? FiatApiMode.enabled.raw);
     final legacyTheme =
         (sharedPreferences.getBool(PreferencesKey.isDarkThemeLegacy) ?? false)
             ? ThemeType.dark.index
@@ -354,7 +355,7 @@ abstract class SettingsStoreBase with Store {
         initialSaveRecipientAddress: shouldSaveRecipientAddress,
         initialFiatMode: currentFiatApiMode,
         initialAllowBiometricalAuthentication: allowBiometricalAuthentication,
-        initialExchangeEnabled: disableExchange,
+        initialExchangeStatus: exchangeStatus,
         initialTheme: savedTheme,
         actionlistDisplayMode: actionListDisplayMode,
         initialPinLength: pinLength,
@@ -400,7 +401,9 @@ abstract class SettingsStoreBase with Store {
     allowBiometricalAuthentication = sharedPreferences
         .getBool(PreferencesKey.allowBiometricalAuthenticationKey) ??
         allowBiometricalAuthentication;
-    disableExchange = sharedPreferences.getBool(PreferencesKey.disableExchangeKey) ?? disableExchange;
+    exchangeStatus = FiatApiMode.deserialize(
+        raw: sharedPreferences
+            .getInt(PreferencesKey.exchangeStatusKey) ?? FiatApiMode.enabled.raw);
     final legacyTheme =
         (sharedPreferences.getBool(PreferencesKey.isDarkThemeLegacy) ?? false)
             ? ThemeType.dark.index

lib/view_model/advanced_privacy_settings_view_model.dart

@@ -1,5 +1,7 @@
 import 'package:cake_wallet/entities/fiat_api_mode.dart';
 import 'package:cake_wallet/store/settings_store.dart';
+import 'package:cake_wallet/view_model/settings/choices_list_item.dart';
+import 'package:cake_wallet/view_model/settings/settings_list_item.dart';
 import 'package:cake_wallet/view_model/settings/switcher_list_item.dart';
 import 'package:cw_core/wallet_type.dart';
 import 'package:mobx/mobx.dart';
@@ -14,18 +16,19 @@ abstract class AdvancedPrivacySettingsViewModelBase with Store {
   AdvancedPrivacySettingsViewModelBase(this.type, this._settingsStore)
       : _addCustomNode = false {
     settings = [
-      SwitcherListItem(
+                ChoicesListItem<FiatApiMode>(
-        title: S.current.disable_fiat,
+                  title: S.current.fiat_api,
-        value: () => _settingsStore.fiatApiMode == FiatApiMode.disabled,
+                  items: FiatApiMode.all,
-        onValueChange: (_, bool value) => setFiatMode(value),
+                  selectedItem: _settingsStore.fiatApiMode,
-      ),
+                  onItemSelected: (FiatApiMode mode) => setFiatMode(mode),
-      SwitcherListItem(
+                ),
-        title: S.current.disable_exchange,
+              
-        value: () => _settingsStore.disableExchange,
+                ChoicesListItem<FiatApiMode>(
-        onValueChange: (_, bool value) {
+                  title: S.current.exchange,
-          _settingsStore.disableExchange = value;
+                  items: FiatApiMode.all,
-        },
+                  selectedItem: _settingsStore.exchangeStatus,
-      ),
+                  onItemSelected: (FiatApiMode mode) => _settingsStore.exchangeStatus = mode,
+              ),
       SwitcherListItem(
         title: S.current.add_custom_node,
         value: () => _addCustomNode,
@@ -34,7 +37,7 @@ abstract class AdvancedPrivacySettingsViewModelBase with Store {
     ];
   }
 
-  late List<SwitcherListItem> settings;
+  late List<SettingsListItem> settings;
 
   @observable
   bool _addCustomNode = false;
@@ -46,11 +49,7 @@ abstract class AdvancedPrivacySettingsViewModelBase with Store {
   bool get addCustomNode => _addCustomNode;
 
   @action
-  void setFiatMode(bool value) {
+  void setFiatMode(FiatApiMode value) {
-    if (value) {
+      _settingsStore.fiatApiMode = value;
-      _settingsStore.fiatApiMode = FiatApiMode.disabled;
-      return;
-    }
-    _settingsStore.fiatApiMode = FiatApiMode.enabled;
   }
 }

lib/view_model/dashboard/dashboard_view_model.dart

@@ -1,3 +1,4 @@
+import 'package:cake_wallet/entities/fiat_api_mode.dart';
 import 'package:cake_wallet/wallet_type_utils.dart';
 import 'package:cw_core/transaction_history.dart';
 import 'package:cw_core/balance.dart';
@@ -96,6 +97,11 @@ abstract class DashboardViewModelBase with Store {
             caption: ExchangeProviderDescription.simpleSwap.title,
             onChanged: () => tradeFilterStore
                 .toggleDisplayExchange(ExchangeProviderDescription.simpleSwap)),
+        FilterItem(
+            value: () => tradeFilterStore.displayTrocador,
+            caption: ExchangeProviderDescription.trocador.title,
+            onChanged: () => tradeFilterStore
+                .toggleDisplayExchange(ExchangeProviderDescription.trocador)),
       ]
     },
     subname = '',
@@ -268,7 +274,7 @@ abstract class DashboardViewModelBase with Store {
       settingsStore.shouldShowYatPopup = shouldShow;
 
   @computed
-  bool get isEnabledExchangeAction => !settingsStore.disableExchange;
+  bool get isEnabledExchangeAction => settingsStore.exchangeStatus != FiatApiMode.disabled;
 
   @observable
   bool hasExchangeAction;

lib/view_model/exchange/exchange_trade_view_model.dart

@@ -1,6 +1,7 @@
 import 'dart:async';
 import 'package:cake_wallet/exchange/sideshift/sideshift_exchange_provider.dart';
 import 'package:cake_wallet/exchange/simpleswap/simpleswap_exchange_provider.dart';
+import 'package:cake_wallet/exchange/trocador/trocador_exchange_provider.dart';
 import 'package:cw_core/wallet_base.dart';
 import 'package:cw_core/crypto_currency.dart';
 import 'package:cake_wallet/exchange/changenow/changenow_exchange_provider.dart';
@@ -46,6 +47,9 @@ abstract class ExchangeTradeViewModelBase with Store {
       case ExchangeProviderDescription.simpleSwap:
         _provider = SimpleSwapExchangeProvider();
         break;
+        case ExchangeProviderDescription.trocador:
+        _provider = TrocadorExchangeProvider();
+        break;
     }
 
     _updateItems();

lib/view_model/exchange/exchange_view_model.dart

@@ -7,6 +7,8 @@ import 'package:cake_wallet/exchange/sideshift/sideshift_exchange_provider.dart'
 import 'package:cake_wallet/exchange/sideshift/sideshift_request.dart';
 import 'package:cake_wallet/exchange/simpleswap/simpleswap_exchange_provider.dart';
 import 'package:cake_wallet/exchange/simpleswap/simpleswap_request.dart';
+import 'package:cake_wallet/exchange/trocador/trocador_exchange_provider.dart';
+import 'package:cake_wallet/exchange/trocador/trocador_request.dart';
 import 'package:cw_core/transaction_priority.dart';
 import 'package:cw_core/wallet_base.dart';
 import 'package:cw_core/crypto_currency.dart';
@@ -60,7 +62,7 @@ abstract class ExchangeViewModelBase with Store {
       limitsState = LimitsInitialState(),
       receiveCurrency = wallet.currency,
       depositCurrency = wallet.currency,
-      providerList = [ChangeNowExchangeProvider(), SideShiftExchangeProvider(), SimpleSwapExchangeProvider()],
+      providerList = [ChangeNowExchangeProvider(), SideShiftExchangeProvider(), SimpleSwapExchangeProvider(), TrocadorExchangeProvider()],
       selectedProviders = ObservableList<ExchangeProvider>() {
     const excludeDepositCurrencies = [CryptoCurrency.btt, CryptoCurrency.nano];
     const excludeReceiveCurrencies = [CryptoCurrency.xlm, CryptoCurrency.xrp,
@@ -449,6 +451,18 @@ abstract class ExchangeViewModelBase with Store {
           amount = isFixedRateMode ? receiveAmount : depositAmount;
         }
 
+        if (provider is TrocadorExchangeProvider) {
+          request = TrocadorRequest(
+              from: depositCurrency,
+              to: receiveCurrency,
+              fromAmount: depositAmount.replaceAll(',', '.'),
+              toAmount: receiveAmount.replaceAll(',', '.'),
+              refundAddress: depositAddress,
+              address: receiveAddress,
+              isReverse: isFixedRateMode);
+          amount = isFixedRateMode ? receiveAmount : depositAmount;
+        }
+
         amount = amount.replaceAll(',', '.');
 
         if (limitsState is LimitsLoadedSuccessfully) {

lib/view_model/settings/privacy_settings_view_model.dart

@@ -12,27 +12,23 @@ abstract class PrivacySettingsViewModelBase with Store {
   final SettingsStore _settingsStore;
 
   @computed
-  bool get disableExchange => _settingsStore.disableExchange;
+  FiatApiMode get exchangeStatus => _settingsStore.exchangeStatus;
 
   @computed
   bool get shouldSaveRecipientAddress => _settingsStore.shouldSaveRecipientAddress;
 
   @computed
-  bool get isFiatDisabled => _settingsStore.fiatApiMode == FiatApiMode.disabled;
+  FiatApiMode get fiatApi => _settingsStore.fiatApiMode;
 
   @action
   void setShouldSaveRecipientAddress(bool value) => _settingsStore.shouldSaveRecipientAddress = value;
 
   @action
-  void setEnableExchange(bool value) => _settingsStore.disableExchange = value;
+  void setEnableExchange(FiatApiMode value) => _settingsStore.exchangeStatus = value;
 
   @action
-  void setFiatMode(bool value) {
+  void setFiatMode(FiatApiMode value) {
-    if (value) {
+      _settingsStore.fiatApiMode = value;
-      _settingsStore.fiatApiMode = FiatApiMode.disabled;
-      return;
-    }
-    _settingsStore.fiatApiMode = FiatApiMode.enabled;
   }
 
 }

lib/view_model/trade_details_view_model.dart

@@ -6,6 +6,7 @@ import 'package:cake_wallet/exchange/morphtoken/morphtoken_exchange_provider.dar
 import 'package:cake_wallet/exchange/sideshift/sideshift_exchange_provider.dart';
 import 'package:cake_wallet/exchange/simpleswap/simpleswap_exchange_provider.dart';
 import 'package:cake_wallet/exchange/trade.dart';
+import 'package:cake_wallet/exchange/trocador/trocador_exchange_provider.dart';
 import 'package:cake_wallet/exchange/xmrto/xmrto_exchange_provider.dart';
 import 'package:cake_wallet/store/settings_store.dart';
 import 'package:cake_wallet/utils/date_formatter.dart';
@@ -48,6 +49,9 @@ abstract class TradeDetailsViewModelBase with Store {
       case  ExchangeProviderDescription.simpleSwap:
         _provider = SimpleSwapExchangeProvider();
         break;
+      case ExchangeProviderDescription.trocador:
+        _provider = TrocadorExchangeProvider();
+        break;
     }
 
     items = ObservableList<StandartListItem>();

tool/utils/secret_key.dart

@@ -29,6 +29,7 @@ class SecretKey {
     SecretKey('anypayToken', () => ''),
     SecretKey('onramperApiKey', () => ''),
     SecretKey('ioniaClientId', () => ''),
+    SecretKey('trocadorApiKey', () => ''),
   ];
 
   final String name;