Merge pull request #765 from cake-tech/CW-282-add-trocador-exchange

CW-282 add trocador exchange

.github/workflows/pr_test_build.yml

@@ -111,6 +111,8 @@ jobs:
           echo "const anypayToken = '${{ secrets.ANY_PAY_TOKEN }}';" >> lib/.secrets.g.dart
           echo "const ioniaClientId = '${{ secrets.IONIA_CLIENT_ID }}';" >> lib/.secrets.g.dart
           echo "const twitterBearerToken = '${{ secrets.TWITTER_BEARER_TOKEN }}';" >> lib/.secrets.g.dart
+          echo "const trocadorApiKey = '${{ secrets.TROCADOR_API_KEY }}';" >> lib/.secrets.g.dart
+          echo "const trocadorExchangeMarkup = '${{ secrets.TROCADOR_EXCHANGE_MARKUP }}';" >> lib/.secrets.g.dart
 
       - name: Rename app
         run: echo -e "id=com.cakewallet.test\nname=$GITHUB_HEAD_REF" > /opt/android/cake_wallet/android/app.properties

cw_core/lib/crypto_currency.dart

@@ -117,7 +117,7 @@ class CryptoCurrency extends EnumerableItem<int> with Serializable<int> {
   static const xusd = CryptoCurrency(title: 'XUSD', tag: 'XHV', raw: 29, name: 'xusd');
 
   static const ape = CryptoCurrency(title: 'APE', tag: 'ETH', fullName: 'ApeCoin', raw: 30, name: 'ape', iconPath: 'assets/images/ape_icon.png');
-  static const avaxc = CryptoCurrency(title: 'AVAX', tag: 'C-CHAIN', raw: 31, name: 'avaxc', iconPath: 'assets/images/avaxc_icon.png');
+  static const avaxc = CryptoCurrency(title: 'AVAX', tag: 'AVAXC', raw: 31, name: 'avaxc', iconPath: 'assets/images/avaxc_icon.png');
   static const btt = CryptoCurrency(title: 'BTT', tag: 'ETH', fullName: 'BitTorrent', raw: 32, name: 'btt', iconPath: 'assets/images/btt_icon.png');
   static const bttc = CryptoCurrency(title: 'BTTC', tag: 'TRX', fullName: 'BitTorrent-NEW', raw: 33, name: 'bttc', iconPath: 'assets/images/bttbsc_icon.png');
   static const doge = CryptoCurrency(title: 'DOGE', fullName: 'Dogecoin', raw: 34, name: 'doge', iconPath: 'assets/images/doge_icon.png');

cw_core/pubspec.yaml

@@ -13,6 +13,7 @@ dependencies:
   flutter:
     sdk: flutter
   http: ^0.13.4
+  file: ^6.1.4
   path_provider: ^2.0.11
   mobx: ^2.0.7+4
   flutter_mobx: ^2.0.6+1

lib/core/backup_service.dart

@@ -217,7 +217,7 @@ class BackupService {
     final fiatApiMode = data[PreferencesKey.currentFiatApiModeKey] as int?;
     final currentPinLength = data[PreferencesKey.currentPinLength] as int?;
     final currentTheme = data[PreferencesKey.currentTheme] as int?;
-    final disableExchange = data[PreferencesKey.disableExchangeKey] as bool?;
+    final exchangeStatus = data[PreferencesKey.exchangeStatusKey] as int?;
     final currentDefaultSettingsMigrationVersion = data[PreferencesKey.currentDefaultSettingsMigrationVersion] as int?;
     final moneroTransactionPriority = data[PreferencesKey.moneroTransactionPriority] as int?;
     final bitcoinTransactionPriority = data[PreferencesKey.bitcoinTransactionPriority] as int?;
@@ -280,9 +280,9 @@ class BackupService {
       await _sharedPreferences.setInt(
         PreferencesKey.currentTheme, currentTheme);
 
-    if (disableExchange != null)
+    if (exchangeStatus != null)
-      await _sharedPreferences.setBool(
+      await _sharedPreferences.setInt(
-        PreferencesKey.disableExchangeKey, disableExchange);
+        PreferencesKey.exchangeStatusKey, exchangeStatus);
 
     if (currentDefaultSettingsMigrationVersion != null)
       await _sharedPreferences.setInt(
@@ -431,8 +431,8 @@ class BackupService {
           _sharedPreferences.getInt(PreferencesKey.displayActionListModeKey),
       PreferencesKey.currentTheme:
           _sharedPreferences.getInt(PreferencesKey.currentTheme),
-      PreferencesKey.disableExchangeKey:
+      PreferencesKey.exchangeStatusKey:
-          _sharedPreferences.getBool(PreferencesKey.disableExchangeKey),
+          _sharedPreferences.getInt(PreferencesKey.exchangeStatusKey),
       PreferencesKey.currentDefaultSettingsMigrationVersion: _sharedPreferences
           .getInt(PreferencesKey.currentDefaultSettingsMigrationVersion),
       PreferencesKey.bitcoinTransactionPriority:

lib/entities/default_settings_migration.dart

@@ -1,10 +1,12 @@
 import 'dart:io' show File, Platform;
 import 'package:cake_wallet/bitcoin/bitcoin.dart';
+import 'package:cake_wallet/entities/exchange_api_mode.dart';
 import 'package:cw_core/pathForWallet.dart';
 import 'package:cake_wallet/entities/secret_store_key.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter_secure_storage/flutter_secure_storage.dart';
 import 'package:hive/hive.dart';
+import 'package:share_plus/share_plus.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 import 'package:cake_wallet/entities/preferences_key.dart';
 import 'package:cw_core/wallet_type.dart';
@@ -142,7 +144,9 @@ Future defaultSettingsMigration(
         case 19:
           await validateBitcoinSavedTransactionPriority(sharedPreferences);
           break;
-
+        case 20:
+          await migrateExchangeStatus(sharedPreferences);
+          break;
         default:
           break;
       }
@@ -501,3 +505,15 @@ Future<void> changeDefaultHavenNode(
     await node.save();
   });
 }
+
+Future<void> migrateExchangeStatus(SharedPreferences sharedPreferences) async {
+  final isExchangeDisabled = sharedPreferences.getBool(PreferencesKey.disableExchangeKey);
+  if (isExchangeDisabled == null) {
+    return;
+  }
+
+  await sharedPreferences.setInt(PreferencesKey.exchangeStatusKey, isExchangeDisabled 
+      ? ExchangeApiMode.disabled.raw : ExchangeApiMode.enabled.raw);
+      
+  await sharedPreferences.remove(PreferencesKey.disableExchangeKey);
+}

lib/entities/exchange_api_mode.dart

@@ -0,0 +1,39 @@
+import 'package:cake_wallet/generated/i18n.dart';
+import 'package:cw_core/enumerable_item.dart';
+
+class ExchangeApiMode extends EnumerableItem<int> with Serializable<int> {
+  const ExchangeApiMode({required String title, required int raw}) : super(title: title, raw: raw);
+
+  static const all = [ExchangeApiMode.enabled, ExchangeApiMode.torOnly, ExchangeApiMode.disabled];
+
+  static const enabled = ExchangeApiMode(raw: 0, title: 'Enabled');
+  static const torOnly = ExchangeApiMode(raw: 1, title: 'Tor only');
+  static const disabled = ExchangeApiMode(raw: 2, title: 'Disabled');
+
+  static ExchangeApiMode deserialize({required int raw}) {
+    switch (raw) {
+      case 0:
+        return enabled;
+      case 1:
+        return torOnly;
+      case 2:
+        return disabled;
+      default:
+        throw Exception('Unexpected token: $raw for ExchangeApiMode deserialize');
+    }
+  }
+
+  @override
+  String toString() {
+    switch (this) {
+      case ExchangeApiMode.enabled:
+        return S.current.enabled;
+      case ExchangeApiMode.torOnly:
+        return S.current.tor_only;
+      case ExchangeApiMode.disabled:
+        return S.current.disabled;
+      default:
+        return '';
+    }
+  }
+}

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 supportsOnionAddress => false;
 
   @override
   String toString() => title;

lib/exchange/exchange_provider_description.dart

@@ -1,18 +1,15 @@
 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 =
@@ -21,11 +18,13 @@ class ExchangeProviderDescription extends EnumerableItem<int>
   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/trade.dart

@@ -8,8 +8,8 @@ part 'trade.g.dart';
 
 @HiveType(typeId: Trade.typeId)
 class Trade extends HiveObject {
-  Trade(
+  Trade({
-      {required this.id,
+    required this.id,
     required this.amount,
     ExchangeProviderDescription? provider,
     CryptoCurrency? from,
@@ -22,7 +22,11 @@ class Trade extends HiveObject {
     this.outputTransaction,
     this.refundAddress,
     this.walletId,
-      this.payoutAddress}) {
+    this.payoutAddress,
+    this.password,
+    this.providerId,
+    this.providerName,
+  }) {
     if (provider != null) {
       providerRaw = provider.raw;
     }
@@ -92,16 +96,23 @@ class Trade extends HiveObject {
   @HiveField(13)
   String? payoutAddress;
 
+  @HiveField(14)
+  String? password;
+
+  @HiveField(15)
+  String? providerId;
+
+  @HiveField(16)
+  String? providerName;
+
   static Trade fromMap(Map<String, Object?> map) {
     return Trade(
         id: map['id'] as String,
-        provider: ExchangeProviderDescription.deserialize(
+        provider: ExchangeProviderDescription.deserialize(raw: map['provider'] as int),
-            raw: map['provider'] as int),
         from: CryptoCurrency.deserialize(raw: map['input'] as int),
         to: CryptoCurrency.deserialize(raw: map['output'] as int),
-        createdAt: map['date'] != null
+        createdAt:
-            ? DateTime.fromMillisecondsSinceEpoch(map['date'] as int)
+            map['date'] != null ? DateTime.fromMillisecondsSinceEpoch(map['date'] as int) : null,
-            : null,
         amount: map['amount'] as String,
         walletId: map['wallet_id'] as String);
   }

lib/exchange/trocador/trocador_exchange_provider.dart

@@ -0,0 +1,312 @@
+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({this.useTorOnly = false})
+      : _lastUsedRateId = '',
+        super(pairList: _supportedPairs());
+
+  bool useTorOnly;
+
+  static const List<CryptoCurrency> _notSupported = [
+    CryptoCurrency.scrt,
+    CryptoCurrency.stx,
+    CryptoCurrency.zaddr,
+  ];
+
+  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 markup = secrets.trocadorExchangeMarkup;
+  static const newRatePath = '/api/new_rate';
+  static const createTradePath = 'api/new_trade';
+  static const tradePath = 'api/trade';
+  static const coinPath = 'api/coin';
+  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': markup,
+      '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 uri = await _getUri(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;
+    final password = responseJSON['password'] as String;
+    final providerId = responseJSON['id_provider'] as String;
+    final providerName = responseJSON['provider'] as String;
+
+    return Trade(
+        id: id,
+        from: request.from,
+        to: request.to,
+        provider: description,
+        inputAddress: inputAddress,
+        refundAddress: refundAddress,
+        state: state,
+        password: password,
+        providerId: providerId,
+        providerName: providerName,
+        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 {
+    final params = <String, String>{
+      'api_key': apiKey,
+      'ticker': from.title.toLowerCase(),
+      'name': from.name,
+    };
+
+    final uri = await _getUri(coinPath, params);
+
+    final response = await get(uri);
+
+    if (response.statusCode != 200) {
+      throw Exception('Unexpected http status: ${response.statusCode}');
+    }
+
+    final responseJSON = json.decode(response.body) as List<dynamic>;
+
+    if (responseJSON.isEmpty) {
+      throw Exception('No data');
+    }
+
+    final coinJson = responseJSON.first as Map<String, dynamic>;
+
+    return Limits(
+      min: coinJson['minimum'] as double,
+      max: coinJson['maximum'] as double,
+    );
+  }
+
+  @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 params = <String, String>{
+        'api_key': apiKey,
+        'ticker_from': from.title.toLowerCase(),
+        'ticker_to': to.title.toLowerCase(),
+        'network_from': _networkFor(from),
+        'network_to': _networkFor(to),
+        if (!isFixedRateMode) 'amount_from': amount.toString(),
+        if (isFixedRateMode) 'amount_to': amount.toString(),
+        'payment': isFixedRateMode ? 'True' : 'False',
+        'min_kycrating': 'C',
+        'markup': markup,
+        'best_only': 'True',
+      };
+
+      final uri = await _getUri(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 uri = await _getUri(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);
+      final password = responseJSON['password'] as String;
+      final providerId = responseJSON['id_provider'] as String;
+      final providerName = responseJSON['provider'] as String;
+
+      return Trade(
+        id: id,
+        from: from,
+        to: to,
+        provider: description,
+        inputAddress: inputAddress,
+        refundAddress: refundAddress,
+        createdAt: date,
+        amount: fromAmount,
+        state: state,
+        payoutAddress: payoutAddress,
+        password: password,
+        providerId: providerId,
+        providerName: providerName,
+      );
+    });
+  }
+
+  @override
+  bool get isAvailable => true;
+
+  @override
+  bool get isEnabled => true;
+
+  @override
+  bool get supportsFixedRate => true;
+
+  @override
+  bool get supportsOnionAddress => true;
+
+  @override
+  String get title => 'Trocador';
+
+  String _networkFor(CryptoCurrency currency) {
+    switch (currency) {
+      case CryptoCurrency.eth:
+        return 'ERC20';
+      case CryptoCurrency.maticpoly:
+        return 'Mainnet';
+      case CryptoCurrency.usdcpoly:
+        return 'MATIC';
+      case CryptoCurrency.zec:
+        return 'Mainnet';
+      default:
+        return currency.tag != null ? _normalizeTag(currency.tag!) : 'Mainnet';
+    }
+  }
+
+  String _normalizeTag(String tag) {
+    switch (tag) {
+      case 'ETH':
+        return 'ERC20';
+      case 'TRX':
+        return 'TRC20';
+      default:
+        return tag.toLowerCase();
+    }
+  }
+
+  Future<Uri> _getUri(String path, Map<String, String> queryParams) async {
+    if (!supportsOnionAddress) {
+      return Uri.https(clearNetAuthority, path, queryParams);
+    }
+
+    final uri = Uri.http(onionApiAuthority, path, queryParams);
+
+    if (useTorOnly) {
+      return uri;
+    }
+
+    try {
+      await get(uri);
+
+      return uri;
+    } catch (e) {
+      return Uri.https(clearNetAuthority, path, queryParams);
+    }
+  }
+}

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;
@@ -37,45 +38,38 @@ class TradeRow extends StatelessWidget {
                   child: Column(
                 mainAxisSize: MainAxisSize.min,
                 children: [
-                      Row(
+                  Row(mainAxisAlignment: MainAxisAlignment.spaceBetween, children: <Widget>[
-                          mainAxisAlignment: MainAxisAlignment.spaceBetween,
-                          children: <Widget>[
                     Text('${from.toString()} → ${to.toString()}',
                         style: TextStyle(
                             fontSize: 16,
                             fontWeight: FontWeight.w500,
-                                    color: Theme.of(context).accentTextTheme!.headline2!.backgroundColor!
+                            color: Theme.of(context).accentTextTheme!.headline2!.backgroundColor!)),
-                                )),
                     formattedAmount != null
                         ? Text(formattedAmount! + ' ' + amountCrypto,
                             style: TextStyle(
                                 fontSize: 16,
                                 fontWeight: FontWeight.w500,
-                                    color: Theme.of(context).accentTextTheme!.headline2!.backgroundColor!
+                                color:
-                                ))
+                                    Theme.of(context).accentTextTheme!.headline2!.backgroundColor!))
                         : Container()
                   ]),
                   SizedBox(height: 5),
-                      Row(
+                  Row(mainAxisAlignment: MainAxisAlignment.spaceBetween, children: <Widget>[
-                          mainAxisAlignment: MainAxisAlignment.spaceBetween,
-                          children: <Widget>[
                     if (createdAtFormattedDate != null)
                       Text(createdAtFormattedDate!,
                           style: TextStyle(
                               fontSize: 14,
-                                      color: Theme.of(context).textTheme!
+                              color: Theme.of(context).textTheme!.overline!.backgroundColor!))
-                                          .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/exchange_api_mode.dart';
+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:flutter_mobx/flutter_mobx.dart';
 import 'package:flutter/material.dart';
 import 'package:cake_wallet/generated/i18n.dart';
@@ -48,29 +52,51 @@ class _AdvancedPrivacySettingsBodyState extends State<AdvancedPrivacySettingsBod
         content: Column(
           crossAxisAlignment: CrossAxisAlignment.center,
           children: [
-            ...widget.privacySettingsViewModel.settings.map(
+            Observer(
-              (item) => Observer(
+              builder: (_) {
-                builder: (_) => SettingsSwitcherCell(
+                return SettingsSwitcherCell(
-                  title: item.title,
+                  title: S.current.disable_fiat,
-                  value: item.value(),
+                  value: widget.privacySettingsViewModel.fiatApi == FiatApiMode.disabled,
-                  onValueChange: item.onValueChange,
+                  onValueChange: (BuildContext context, bool value) {
-                ),
+                    widget.privacySettingsViewModel.setFiatMode(value);
-              ),
+                  });
+              }
             ),
             Observer(
               builder: (_) {
-                if (widget.privacySettingsViewModel.addCustomNode) {
+                return SettingsChoicesCell(
-                  return Padding(
+                  ChoicesListItem<ExchangeApiMode>(
+                    title: S.current.exchange,
+                    items: ExchangeApiMode.all,
+                    selectedItem: widget.privacySettingsViewModel.exchangeStatus,
+                    onItemSelected: (ExchangeApiMode mode) =>
+                        widget.privacySettingsViewModel.setExchangeApiMode(mode),
+                  ),
+                );
+              }
+            ),
+            Observer(
+              builder: (_) {
+                return Column(
+                  children: [
+                    SettingsSwitcherCell(
+                      title: S.current.add_custom_node,
+                      value: widget.privacySettingsViewModel.addCustomNode,
+                      onValueChange: (_, __) => widget.privacySettingsViewModel.toggleAddCustomNode(),
+                    ),
+                    if (widget.privacySettingsViewModel.addCustomNode)
+                    Padding(
                       padding: EdgeInsets.only(left: 24, right: 24, top: 24),
                       child: NodeForm(
                         formKey: _formKey,
                         nodeViewModel: widget.nodeViewModel,
                       ),
+                    )
+                  ],
                 );
               }
-                return const SizedBox();
-              },
             ),
+            
           ],
         ),
         bottomSectionPadding: EdgeInsets.all(24),

lib/src/screens/settings/privacy_page.dart

@@ -1,6 +1,10 @@
+import 'package:cake_wallet/entities/exchange_api_mode.dart';
+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';
@@ -27,12 +31,14 @@ class PrivacyPage extends BasePage {
                 onValueChange: (BuildContext context, bool value) {
                   _privacySettingsViewModel.setFiatMode(value);
                 }),
-              SettingsSwitcherCell(
+              SettingsChoicesCell(
-                  title: S.current.disable_exchange,
+                ChoicesListItem<ExchangeApiMode>(
-                  value: _privacySettingsViewModel.disableExchange,
+                  title: S.current.exchange,
-                  onValueChange: (BuildContext context, bool value) {
+                  items: ExchangeApiMode.all,
-                    _privacySettingsViewModel.setEnableExchange(value);
+                  selectedItem: _privacySettingsViewModel.exchangeStatus,
-                  }),
+                  onItemSelected: (ExchangeApiMode mode) => _privacySettingsViewModel.setExchangeApiMode(mode),
+                ),
+              ),
               SettingsSwitcherCell(
                   title: S.current.settings_save_recipient_address,
                   value: _privacySettingsViewModel.shouldSaveRecipientAddress,

lib/src/widgets/check_box_picker.dart

@@ -38,7 +38,7 @@ class CheckBoxPickerState extends State<CheckBoxPicker> {
           Column(
             mainAxisSize: MainAxisSize.min,
             children: <Widget>[
-              if (widget.title?.isNotEmpty ?? false)
+              if (widget.title.isNotEmpty)
                 Container(
                   padding: EdgeInsets.symmetric(horizontal: 24),
                   child: Text(
@@ -58,7 +58,7 @@ class CheckBoxPickerState extends State<CheckBoxPicker> {
                 child: ClipRRect(
                   borderRadius: BorderRadius.all(Radius.circular(30)),
                   child: Container(
-                    color: Theme.of(context).accentTextTheme!.headline6!.color!,
+                    color: Theme.of(context).accentTextTheme.headline6!.color!,
                     child: ConstrainedBox(
                       constraints: BoxConstraints(
                         maxHeight: MediaQuery.of(context).size.height * 0.65,
@@ -70,7 +70,7 @@ class CheckBoxPickerState extends State<CheckBoxPicker> {
                             child: Stack(
                               alignment: Alignment.center,
                               children: <Widget>[
-                                (items?.length ?? 0) > 3
+                                (items.length) > 3
                                     ? Scrollbar(
                                         controller: controller,
                                         child: itemsList(),
@@ -95,14 +95,14 @@ class CheckBoxPickerState extends State<CheckBoxPicker> {
 
   Widget itemsList() {
     return Container(
-      color: Theme.of(context).accentTextTheme!.headline6!.backgroundColor!,
+      color: Theme.of(context).accentTextTheme.headline6!.backgroundColor!,
       child: ListView.separated(
         padding: EdgeInsets.zero,
         controller: controller,
         shrinkWrap: true,
         separatorBuilder: (context, index) => widget.isSeparated
             ? Divider(
-                color: Theme.of(context).accentTextTheme!.headline6!.backgroundColor!,
+                color: Theme.of(context).accentTextTheme.headline6!.backgroundColor!,
                 height: 1,
               )
             : const SizedBox(),
@@ -121,13 +121,13 @@ class CheckBoxPickerState extends State<CheckBoxPicker> {
       },
       child: Container(
         height: 55,
-        color: Theme.of(context).accentTextTheme!.headline6!.color!,
+        color: Theme.of(context).accentTextTheme.headline6!.color!,
         padding: EdgeInsets.only(left: 24, right: 24),
         child: CheckboxListTile(
           value: item.value,
           activeColor: item.value
               ? Palette.blueCraiola
-              : Theme.of(context).accentTextTheme!.subtitle1!.decorationColor!,
+              : Theme.of(context).accentTextTheme.subtitle1!.decorationColor!,
           checkColor: Colors.white,
           title: widget.displayItem?.call(item) ??
               Text(
@@ -138,7 +138,7 @@ class CheckBoxPickerState extends State<CheckBoxPicker> {
                   fontWeight: FontWeight.w600,
                   color: item.isDisabled
                       ? Colors.grey.withOpacity(0.5)
-                      : Theme.of(context).primaryTextTheme!.headline6!.color!,
+                      : Theme.of(context).primaryTextTheme.headline6!.color!,
                   decoration: TextDecoration.none,
                 ),
               ),

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

@@ -1,4 +1,5 @@
 import 'package:cake_wallet/bitcoin/bitcoin.dart';
+import 'package:cake_wallet/entities/exchange_api_mode.dart';
 import 'package:cake_wallet/entities/pin_code_required_duration.dart';
 import 'package:cake_wallet/entities/preferences_key.dart';
 import 'package:cw_core/transaction_priority.dart';
@@ -31,7 +32,7 @@ abstract class SettingsStoreBase with Store {
       required bool initialSaveRecipientAddress,
       required FiatApiMode initialFiatMode,
       required bool initialAllowBiometricalAuthentication,
-      required bool initialExchangeEnabled,
+      required ExchangeApiMode initialExchangeStatus,
       required ThemeBase initialTheme,
       required int initialPinLength,
       required String initialLanguageCode,
@@ -53,7 +54,7 @@ abstract class SettingsStoreBase with Store {
     shouldSaveRecipientAddress = initialSaveRecipientAddress,
     fiatApiMode = initialFiatMode,
     allowBiometricalAuthentication = initialAllowBiometricalAuthentication,
-    disableExchange = initialExchangeEnabled,
+    exchangeStatus = initialExchangeStatus,
     currentTheme = initialTheme,
     pinCodeLength = initialPinLength,
     languageCode = initialLanguageCode,
@@ -153,9 +154,9 @@ abstract class SettingsStoreBase with Store {
             PreferencesKey.currentBalanceDisplayModeKey, mode.serialize()));
 
     reaction(
-            (_) => disableExchange,
+            (_) => exchangeStatus,
-            (bool disableExchange) => sharedPreferences.setBool(
+            (ExchangeApiMode mode) => sharedPreferences.setInt(
-            PreferencesKey.disableExchangeKey, disableExchange));
+            PreferencesKey.exchangeStatusKey, mode.serialize()));
 
     this
         .nodes
@@ -192,7 +193,7 @@ abstract class SettingsStoreBase with Store {
   bool allowBiometricalAuthentication;
 
   @observable
-  bool disableExchange;
+  ExchangeApiMode exchangeStatus;
 
   @observable
   ThemeBase currentTheme;
@@ -284,8 +285,9 @@ abstract class SettingsStoreBase with Store {
     final allowBiometricalAuthentication = sharedPreferences
             .getBool(PreferencesKey.allowBiometricalAuthenticationKey) ??
         false;
-    final disableExchange = sharedPreferences
+    final exchangeStatus = ExchangeApiMode.deserialize(
-            .getBool(PreferencesKey.disableExchangeKey) ?? false;
+        raw: sharedPreferences
+            .getInt(PreferencesKey.exchangeStatusKey) ?? ExchangeApiMode.enabled.raw);
     final legacyTheme =
         (sharedPreferences.getBool(PreferencesKey.isDarkThemeLegacy) ?? false)
             ? ThemeType.dark.index
@@ -354,7 +356,7 @@ abstract class SettingsStoreBase with Store {
         initialSaveRecipientAddress: shouldSaveRecipientAddress,
         initialFiatMode: currentFiatApiMode,
         initialAllowBiometricalAuthentication: allowBiometricalAuthentication,
-        initialExchangeEnabled: disableExchange,
+        initialExchangeStatus: exchangeStatus,
         initialTheme: savedTheme,
         actionlistDisplayMode: actionListDisplayMode,
         initialPinLength: pinLength,
@@ -400,7 +402,9 @@ abstract class SettingsStoreBase with Store {
     allowBiometricalAuthentication = sharedPreferences
         .getBool(PreferencesKey.allowBiometricalAuthenticationKey) ??
         allowBiometricalAuthentication;
-    disableExchange = sharedPreferences.getBool(PreferencesKey.disableExchangeKey) ?? disableExchange;
+    exchangeStatus = ExchangeApiMode.deserialize(
+        raw: sharedPreferences
+            .getInt(PreferencesKey.exchangeStatusKey) ?? ExchangeApiMode.enabled.raw);
     final legacyTheme =
         (sharedPreferences.getBool(PreferencesKey.isDarkThemeLegacy) ?? false)
             ? ThemeType.dark.index

lib/view_model/advanced_privacy_settings_view_model.dart

@@ -1,9 +1,8 @@
+import 'package:cake_wallet/entities/exchange_api_mode.dart';
 import 'package:cake_wallet/entities/fiat_api_mode.dart';
 import 'package:cake_wallet/store/settings_store.dart';
-import 'package:cake_wallet/view_model/settings/switcher_list_item.dart';
 import 'package:cw_core/wallet_type.dart';
 import 'package:mobx/mobx.dart';
-import 'package:cake_wallet/generated/i18n.dart';
 
 part 'advanced_privacy_settings_view_model.g.dart';
 
@@ -11,35 +10,19 @@ class AdvancedPrivacySettingsViewModel = AdvancedPrivacySettingsViewModelBase
     with _$AdvancedPrivacySettingsViewModel;
 
 abstract class AdvancedPrivacySettingsViewModelBase with Store {
-  AdvancedPrivacySettingsViewModelBase(this.type, this._settingsStore)
+  AdvancedPrivacySettingsViewModelBase(this.type, this._settingsStore) : _addCustomNode = false;
-      : _addCustomNode = false {
-    settings = [
-      SwitcherListItem(
-        title: S.current.disable_fiat,
-        value: () => _settingsStore.fiatApiMode == FiatApiMode.disabled,
-        onValueChange: (_, bool value) => setFiatMode(value),
-      ),
-      SwitcherListItem(
-        title: S.current.disable_exchange,
-        value: () => _settingsStore.disableExchange,
-        onValueChange: (_, bool value) {
-          _settingsStore.disableExchange = value;
-        },
-      ),
-      SwitcherListItem(
-        title: S.current.add_custom_node,
-        value: () => _addCustomNode,
-        onValueChange: (_, bool value) => _addCustomNode = value,
-      ),
-    ];
-  }
 
-  late List<SwitcherListItem> settings;
+  @computed
+  ExchangeApiMode get exchangeStatus => _settingsStore.exchangeStatus;
+
+  @computed
+  FiatApiMode get fiatApi => _settingsStore.fiatApiMode;
 
   @observable
   bool _addCustomNode = false;
 
   final WalletType type;
+
   final SettingsStore _settingsStore;
 
   @computed
@@ -53,4 +36,14 @@ abstract class AdvancedPrivacySettingsViewModelBase with Store {
     }
     _settingsStore.fiatApiMode = FiatApiMode.enabled;
   }
+
+  @action
+  void setExchangeApiMode(ExchangeApiMode value) {
+    _settingsStore.exchangeStatus = value;
+  }
+
+  @action
+  void toggleAddCustomNode() {
+    _addCustomNode = !_addCustomNode;
+  }
 }

lib/view_model/dashboard/dashboard_view_model.dart

@@ -1,3 +1,5 @@
+import 'package:cake_wallet/entities/exchange_api_mode.dart';
+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 +98,11 @@ 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 +275,7 @@ abstract class DashboardViewModelBase with Store {
       settingsStore.shouldShowYatPopup = shouldShow;
 
   @computed
-  bool get isEnabledExchangeAction => !settingsStore.disableExchange;
+  bool get isEnabledExchangeAction => settingsStore.exchangeStatus != ExchangeApiMode.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

@@ -2,11 +2,15 @@ import 'dart:async';
 import 'dart:collection';
 import 'dart:convert';
 
+import 'package:cake_wallet/entities/exchange_api_mode.dart';
+import 'package:cake_wallet/entities/fiat_api_mode.dart';
 import 'package:cake_wallet/entities/preferences_key.dart';
 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';
@@ -53,6 +57,7 @@ abstract class ExchangeViewModelBase with Store {
       isDepositAddressEnabled = false,
       isReceiveAddressEnabled = false,
       isReceiveAmountEditable = false,
+      _useTorOnly = false,
       receiveCurrencies = <CryptoCurrency>[],
       depositCurrencies = <CryptoCurrency>[],
       limits = Limits(min: 0, max: 0),
@@ -60,8 +65,10 @@ abstract class ExchangeViewModelBase with Store {
       limitsState = LimitsInitialState(),
       receiveCurrency = wallet.currency,
       depositCurrency = wallet.currency,
-      providerList = [ChangeNowExchangeProvider(), SideShiftExchangeProvider(), SimpleSwapExchangeProvider()],
+      providerList = [],
       selectedProviders = ObservableList<ExchangeProvider>() {
+    _useTorOnly = _settingsStore.exchangeStatus == ExchangeApiMode.torOnly;
+    _setProviders();
     const excludeDepositCurrencies = [CryptoCurrency.btt, CryptoCurrency.nano];
     const excludeReceiveCurrencies = [CryptoCurrency.xlm, CryptoCurrency.xrp,
       CryptoCurrency.bnb, CryptoCurrency.btt, CryptoCurrency.nano];
@@ -117,13 +124,20 @@ abstract class ExchangeViewModelBase with Store {
         _calculateBestRate();
       });
   }
-
+  bool _useTorOnly;
   final WalletBase wallet;
   final Box<Trade> trades;
   final ExchangeTemplateStore _exchangeTemplateStore;
   final TradesStore tradesStore;
   final SharedPreferences sharedPreferences;
 
+  List<ExchangeProvider> get _allProviders => [
+        ChangeNowExchangeProvider(),
+        SideShiftExchangeProvider(),
+        SimpleSwapExchangeProvider(),
+        TrocadorExchangeProvider(useTorOnly: _useTorOnly),
+      ];
+
   @observable
   ExchangeProvider? provider;
 
@@ -455,6 +469,18 @@ 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) {
@@ -675,4 +701,12 @@ abstract class ExchangeViewModelBase with Store {
         break;
     }
   }
+
+  void _setProviders(){
+    if (_settingsStore.exchangeStatus == ExchangeApiMode.torOnly) {
+      providerList = _allProviders.where((provider) => provider.supportsOnionAddress).toList();
+    } else {
+      providerList = _allProviders;
+    }
+  }
 }

lib/view_model/settings/privacy_settings_view_model.dart

@@ -1,3 +1,4 @@
+import 'package:cake_wallet/entities/exchange_api_mode.dart';
 import 'package:cake_wallet/store/settings_store.dart';
 import 'package:mobx/mobx.dart';
 import 'package:cake_wallet/entities/fiat_api_mode.dart';
@@ -12,7 +13,7 @@ abstract class PrivacySettingsViewModelBase with Store {
   final SettingsStore _settingsStore;
 
   @computed
-  bool get disableExchange => _settingsStore.disableExchange;
+  ExchangeApiMode get exchangeStatus => _settingsStore.exchangeStatus;
 
   @computed
   bool get shouldSaveRecipientAddress => _settingsStore.shouldSaveRecipientAddress;
@@ -24,7 +25,7 @@ abstract class PrivacySettingsViewModelBase with Store {
   void setShouldSaveRecipientAddress(bool value) => _settingsStore.shouldSaveRecipientAddress = value;
 
   @action
-  void setEnableExchange(bool value) => _settingsStore.disableExchange = value;
+  void setExchangeApiMode(ExchangeApiMode value) => _settingsStore.exchangeStatus = value;
 
   @action
   void setFiatMode(bool value) {

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';
@@ -22,15 +23,14 @@ import 'package:cake_wallet/src/screens/trade_details/trade_details_status_item.
 import 'package:url_launcher/url_launcher.dart';
 part 'trade_details_view_model.g.dart';
 
-class TradeDetailsViewModel = TradeDetailsViewModelBase
+class TradeDetailsViewModel = TradeDetailsViewModelBase with _$TradeDetailsViewModel;
-    with _$TradeDetailsViewModel;
 
 abstract class TradeDetailsViewModelBase with Store {
   TradeDetailsViewModelBase({
     required Trade tradeForDetails,
     required this.trades,
-    required this.settingsStore})
+    required this.settingsStore,
-  : items = ObservableList<StandartListItem>(),
+  })  : items = ObservableList<StandartListItem>(),
         trade = tradeForDetails {
     switch (trade.provider) {
       case ExchangeProviderDescription.xmrto:
@@ -48,6 +48,9 @@ abstract class TradeDetailsViewModelBase with Store {
       case ExchangeProviderDescription.simpleSwap:
         _provider = SimpleSwapExchangeProvider();
         break;
+      case ExchangeProviderDescription.trocador:
+        _provider = TrocadorExchangeProvider();
+        break;
     }
 
     items = ObservableList<StandartListItem>();
@@ -96,12 +99,7 @@ abstract class TradeDetailsViewModelBase with Store {
     items.clear();
 
     items.add(
-        DetailsListStatusItem(
+        DetailsListStatusItem(title: S.current.trade_details_state, value: trade.state.toString()));
-          title: S.current.trade_details_state,
-          value: trade.state != null
-              ? trade.state.toString()
-              : S.current.trade_details_fetching)
-    );
 
     items.add(TradeDetailsListCardItem.tradeDetails(
       id: trade.id,
@@ -114,15 +112,11 @@ abstract class TradeDetailsViewModelBase with Store {
       },
     ));
 
-    if (trade.provider != null) {
     items.add(StandartListItem(
-          title: S.current.trade_details_provider,
+        title: S.current.trade_details_provider, value: trade.provider.toString()));
-          value: trade.provider.toString()));
-    }
 
     if (trade.provider == ExchangeProviderDescription.changeNow) {
-      final buildURL =
+      final buildURL = 'https://changenow.io/exchange/txs/${trade.id.toString()}';
-          'https://changenow.io/exchange/txs/${trade.id.toString()}';
       items.add(TrackTradeListItem(
           title: 'Track',
           value: buildURL,
@@ -133,14 +127,25 @@ abstract class TradeDetailsViewModelBase with Store {
 
     if (trade.provider == ExchangeProviderDescription.sideShift) {
       final buildURL = 'https://sideshift.ai/orders/${trade.id.toString()}';
-      items.add(TrackTradeListItem(
+      items.add(TrackTradeListItem(title: 'Track', value: buildURL, onTap: () => launch(buildURL)));
-          title: 'Track', value: buildURL, onTap: () => launch(buildURL)));
     }
 
     if (trade.provider == ExchangeProviderDescription.simpleSwap) {
       final buildURL = 'https://simpleswap.io/exchange?id=${trade.id.toString()}';
-      items.add(TrackTradeListItem(
+      items.add(TrackTradeListItem(title: 'Track', value: buildURL, onTap: () => launch(buildURL)));
-          title: 'Track', value: buildURL, onTap: () => launch(buildURL)));
+    }
+
+    if (trade.provider == ExchangeProviderDescription.trocador) {
+      final buildURL = 'https://trocador.app/en/checkout/${trade.id.toString()}';
+      items.add(TrackTradeListItem(title: 'Track', value: buildURL, onTap: () => launch(buildURL)));
+
+      items.add(StandartListItem(
+          title: '${trade.providerName} ${S.current.id.toUpperCase()}',
+          value: trade.providerId ?? ''));
+
+      if (trade.password != null && trade.password!.isNotEmpty)
+        items.add(StandartListItem(
+            title: '${trade.providerName} ${S.current.password}', value: trade.password ?? ''));
     }
   }
 }

tool/utils/secret_key.dart

@@ -6,17 +6,12 @@ class SecretKey {
 
   static final base = [
     SecretKey('salt', () => hex.encode(encrypt.Key.fromSecureRandom(16).bytes)),
-    SecretKey('keychainSalt',
+    SecretKey('keychainSalt', () => hex.encode(encrypt.Key.fromSecureRandom(12).bytes)),
-        () => hex.encode(encrypt.Key.fromSecureRandom(12).bytes)),
     SecretKey('key', () => hex.encode(encrypt.Key.fromSecureRandom(16).bytes)),
-    SecretKey(
+    SecretKey('walletSalt', () => hex.encode(encrypt.Key.fromSecureRandom(4).bytes)),
-        'walletSalt', () => hex.encode(encrypt.Key.fromSecureRandom(4).bytes)),
+    SecretKey('shortKey', () => hex.encode(encrypt.Key.fromSecureRandom(12).bytes)),
-    SecretKey(
+    SecretKey('backupSalt', () => hex.encode(encrypt.Key.fromSecureRandom(8).bytes)),
-        'shortKey', () => hex.encode(encrypt.Key.fromSecureRandom(12).bytes)),
+    SecretKey('backupKeychainSalt', () => hex.encode(encrypt.Key.fromSecureRandom(12).bytes)),
-    SecretKey(
-        'backupSalt', () => hex.encode(encrypt.Key.fromSecureRandom(8).bytes)),
-    SecretKey('backupKeychainSalt',
-        () => hex.encode(encrypt.Key.fromSecureRandom(12).bytes)),
     SecretKey('changeNowApiKey', () => ''),
     SecretKey('wyreSecretKey', () => ''),
     SecretKey('wyreApiKey', () => ''),
@@ -29,6 +24,8 @@ class SecretKey {
     SecretKey('anypayToken', () => ''),
     SecretKey('onramperApiKey', () => ''),
     SecretKey('ioniaClientId', () => ''),
+    SecretKey('trocadorApiKey', () => ''),
+    SecretKey('trocadorExchangeMarkup', () => ''),
     SecretKey('twitterBearerToken', () => ''),
   ];