Merge branch 'main' into CAKE-284-add-support-to-the-main-menu

# Conflicts: # lib/view_model/settings/settings_view_model.dart
2026-10-21 06:18:42 +02:00 · 2021-03-01 19:51:08 +02:00
parent f12995db8a bc70a3302b
commit 5b242002d1
25 changed files with 594 additions and 221 deletions
@@ -15,7 +15,8 @@ class AddressValidator extends TextValidator {
      case CryptoCurrency.xmr:
        return '[0-9a-zA-Z]';
      case CryptoCurrency.ada:
-        return '[0-9a-zA-Z]';
+        return '^[0-9a-zA-Z]{59}\$|^[0-9a-zA-Z]{92}\$|^[0-9a-zA-Z]{104}\$'
+            '|^[0-9a-zA-Z]{105}\$|^addr1[0-9a-zA-Z]{98}\$';
      case CryptoCurrency.bch:
        return '[0-9a-zA-Z]';
      case CryptoCurrency.bnb:
@@ -54,7 +55,7 @@ class AddressValidator extends TextValidator {
      case CryptoCurrency.xmr:
        return [95, 106];
      case CryptoCurrency.ada:
-        return [59, 92, 104, 105];
+        return null;
      case CryptoCurrency.bch:
        return [42];
      case CryptoCurrency.bnb:
@@ -29,6 +29,8 @@ class ChangeNowExchangeProvider extends ExchangeProvider {
  static const _exchangeAmountUriSufix = '/exchange-amount/';
  static const _transactionsUriSufix = '/transactions/';
  static const _minAmountUriSufix = '/min-amount/';
+  static const _marketInfoUriSufix = '/market-info/';
+  static const _fixedRateUriSufix = 'fixed-rate/';

  @override
  String get title => 'ChangeNOW';
@@ -44,19 +46,43 @@ class ChangeNowExchangeProvider extends ExchangeProvider {
  Future<bool> checkIsAvailable() async => true;

  @override
-  Future<Limits> fetchLimits({CryptoCurrency from, CryptoCurrency to}) async {
+  Future<Limits> fetchLimits({CryptoCurrency from, CryptoCurrency to,
+    bool isFixedRateMode}) async {
    final symbol = from.toString() + '_' + to.toString();
-    final url = apiUri + _minAmountUriSufix + symbol;
+    final url = isFixedRateMode
+        ? apiUri + _marketInfoUriSufix + _fixedRateUriSufix + apiKey
+        : apiUri + _minAmountUriSufix + symbol;
    final response = await get(url);
-    final responseJSON = json.decode(response.body) as Map<String, dynamic>;
-    final min = responseJSON['minAmount'] as double;

-    return Limits(min: min, max: null);
+    if (isFixedRateMode) {
+      final responseJSON = json.decode(response.body) as List<dynamic>;
+
+      for (var elem in responseJSON) {
+        final elemFrom = elem["from"] as String;
+        final elemTo = elem["to"] as String;
+
+        if ((elemFrom == from.toString().toLowerCase()) &&
+            (elemTo == to.toString().toLowerCase())) {
+          final min = elem["min"] as double;
+          final max = elem["max"] as double;
+
+          return Limits(min: min, max: max);
+        }
+      }
+      return Limits(min: 0, max: 0);
+    } else {
+      final responseJSON = json.decode(response.body) as Map<String, dynamic>;
+      final min = responseJSON['minAmount'] as double;
+
+      return Limits(min: min, max: null);
+    }
  }

  @override
-  Future<Trade> createTrade({TradeRequest request}) async {
-    const url = apiUri + _transactionsUriSufix + apiKey;
+  Future<Trade> createTrade({TradeRequest request, bool isFixedRateMode}) async {
+    final url = isFixedRateMode
+    ? apiUri + _transactionsUriSufix + _fixedRateUriSufix + apiKey
+    : apiUri + _transactionsUriSufix + apiKey;
    final _request = request as ChangeNowRequest;
    final body = {
      'from': _request.from.toString(),
@@ -127,17 +153,35 @@ class ChangeNowExchangeProvider extends ExchangeProvider {
    final state = TradeState.deserialize(raw: status);
    final extraId = responseJSON['payinExtraId'] as String;
    final outputTransaction = responseJSON['payoutHash'] as String;
+    final expiredAtRaw = responseJSON['validUntil'] as String;
+    final expiredAt = expiredAtRaw != null
+        ? DateTime.parse(expiredAtRaw).toLocal()
+        : null;

-    return Trade(
-        id: id,
-        from: from,
-        to: to,
-        provider: description,
-        inputAddress: inputAddress,
-        amount: expectedSendAmount,
-        state: state,
-        extraId: extraId,
-        outputTransaction: outputTransaction);
+    if (expiredAt != null) {
+      return Trade(
+          id: id,
+          from: from,
+          to: to,
+          provider: description,
+          inputAddress: inputAddress,
+          amount: expectedSendAmount,
+          state: state,
+          extraId: extraId,
+          expiredAt: expiredAt,
+          outputTransaction: outputTransaction);
+    } else {
+      return Trade(
+          id: id,
+          from: from,
+          to: to,
+          provider: description,
+          inputAddress: inputAddress,
+          amount: expectedSendAmount,
+          state: state,
+          extraId: extraId,
+          outputTransaction: outputTransaction);
+    }
  }

  @override
@@ -145,18 +189,54 @@ class ChangeNowExchangeProvider extends ExchangeProvider {
      {CryptoCurrency from,
      CryptoCurrency to,
      double amount,
+      bool isFixedRateMode,
      bool isReceiveAmount}) async {
-    final url = apiUri +
-        _exchangeAmountUriSufix +
-        amount.toString() +
-        '/' +
-        from.toString() +
-        '_' +
-        to.toString();
-    final response = await get(url);
-    final responseJSON = json.decode(response.body) as Map<String, dynamic>;
-    final estimatedAmount = responseJSON['estimatedAmount'] as double;
+    if (isReceiveAmount && isFixedRateMode) {
+      final url = apiUri + _marketInfoUriSufix + _fixedRateUriSufix + apiKey;
+      final response = await get(url);
+      final responseJSON = json.decode(response.body) as List<dynamic>;
+      var rate = 0.0;
+      var fee = 0.0;

-    return estimatedAmount;
+      for (var elem in responseJSON) {
+        final elemFrom = elem["from"] as String;
+        final elemTo = elem["to"] as String;
+
+        if ((elemFrom == to.toString().toLowerCase()) &&
+            (elemTo == from.toString().toLowerCase())) {
+          rate = elem["rate"] as double;
+          fee = elem["minerFee"] as double;
+          break;
+        }
+      }
+
+      final estimatedAmount = (amount == 0.0)||(rate == 0.0) ? 0.0
+          : (amount + fee)/rate;
+
+      return estimatedAmount;
+    } else {
+      final url = isFixedRateMode
+          ? apiUri +
+          _exchangeAmountUriSufix +
+          _fixedRateUriSufix +
+          amount.toString() +
+          '/' +
+          from.toString() +
+          '_' +
+          to.toString() +
+          '?api_key=' + apiKey
+          : apiUri +
+          _exchangeAmountUriSufix +
+          amount.toString() +
+          '/' +
+          from.toString() +
+          '_' +
+          to.toString();
+      final response = await get(url);
+      final responseJSON = json.decode(response.body) as Map<String, dynamic>;
+      final estimatedAmount = responseJSON['estimatedAmount'] as double;
+
+      return estimatedAmount;
+    }
  }
 }
@@ -17,10 +17,11 @@ abstract class ExchangeProvider {
  @override
  String toString() => title;

-  Future<Limits> fetchLimits({CryptoCurrency from, CryptoCurrency to});
-  Future<Trade> createTrade({TradeRequest request});
+  Future<Limits> fetchLimits(
+      {CryptoCurrency from, CryptoCurrency to, bool isFixedRateMode});
+  Future<Trade> createTrade({TradeRequest request, bool isFixedRateMode});
  Future<Trade> findTradeById({@required String id});
-  Future<double> calculateAmount(
-    {CryptoCurrency from, CryptoCurrency to, double amount, bool isReceiveAmount});
+  Future<double> calculateAmount({CryptoCurrency from, CryptoCurrency to,
+    double amount, bool isFixedRateMode, bool isReceiveAmount});
  Future<bool> checkIsAvailable();
 }
@@ -71,7 +71,7 @@ class MorphTokenExchangeProvider extends ExchangeProvider {
  Future<bool> checkIsAvailable() async => true;

  @override
-  Future<Limits> fetchLimits({CryptoCurrency from, CryptoCurrency to}) async {
+  Future<Limits> fetchLimits({CryptoCurrency from, CryptoCurrency to, bool isFixedRateMode}) async {
    final url = apiUri + _limitsURISuffix;
    final headers = {'Content-type': 'application/json'};
    final body = json.encode({
@@ -100,7 +100,7 @@ class MorphTokenExchangeProvider extends ExchangeProvider {
  }

  @override
-  Future<Trade> createTrade({TradeRequest request}) async {
+  Future<Trade> createTrade({TradeRequest request, bool isFixedRateMode}) async {
    const url = apiUri + _morphURISuffix;
    final _request = request as MorphTokenRequest;
    final body = {
@@ -191,7 +191,7 @@ class MorphTokenExchangeProvider extends ExchangeProvider {

  @override
  Future<double> calculateAmount(
-      {CryptoCurrency from, CryptoCurrency to, double amount,
+      {CryptoCurrency from, CryptoCurrency to, double amount, bool isFixedRateMode,
        bool isReceiveAmount}) async {
    final url = apiUri + _ratesURISuffix;
    final response = await get(url);
@@ -58,7 +58,7 @@ class XMRTOExchangeProvider extends ExchangeProvider {
  }

  @override
-  Future<Limits> fetchLimits({CryptoCurrency from, CryptoCurrency to}) async {
+  Future<Limits> fetchLimits({CryptoCurrency from, CryptoCurrency to, bool isFixedRateMode}) async {
    final url = originalApiUri + _orderParameterUriSuffix;
    final response = await get(url);
    final correction = 0.001;
@@ -91,7 +91,7 @@ class XMRTOExchangeProvider extends ExchangeProvider {
  }

  @override
-  Future<Trade> createTrade({TradeRequest request}) async {
+  Future<Trade> createTrade({TradeRequest request, bool isFixedRateMode}) async {
    final _request = request as XMRTOTradeRequest;
    final url = originalApiUri + _orderCreateUriSuffix;
    final _amount =
@@ -188,6 +188,7 @@ class XMRTOExchangeProvider extends ExchangeProvider {
      {CryptoCurrency from,
      CryptoCurrency to,
      double amount,
+      bool isFixedRateMode,
      bool isReceiveAmount}) async {
    if (from != CryptoCurrency.xmr && to != CryptoCurrency.btc) {
      return 0;
@@ -35,7 +35,7 @@ class S implements WidgetsLocalizations {
  String get all => "ALL";
  String get amount => "Amount: ";
  String get amount_is_estimate => "The receive amount is an estimate";
-  String get amount_is_guaranteed => "In xmr.to, to receive a guaranteed BTC amount, enter the BTC amount and not the XMR amount above";
+  String get amount_is_guaranteed => "The receive amount is guaranteed";
  String get auth_store_ban_timeout => "ban_timeout";
  String get auth_store_banned_for => "Banned for ";
  String get auth_store_banned_minutes => " minutes";
@@ -395,6 +395,10 @@ class S implements WidgetsLocalizations {
  String get confirmed => 'Confirmed';
  String get unconfirmed => 'Unconfirmed';
  String get displayable => 'Displayable';
+  String get fixed_rate => 'Fixed rate';
+  String get fixed_rate_alert => 'You will be able to enter receive amount when fixed rate mode is checked. Do you want to switch to fixed rate mode?';
+  String get xlm_extra_info => 'Please don’t forget to specify the Memo ID while sending the XLM transaction for the exchange';
+  String get xrp_extra_info => 'Please don’t forget to specify the Destination Tag while sending the XRP transaction for the exchange';
 }

 class $de extends S {
@@ -536,7 +540,7 @@ class $de extends S {
  @override
  String get receive => "Erhalten";
  @override
-  String get amount_is_guaranteed => "Geben Sie in xmr.to den BTC-Betrag und nicht den oben genannten XMR-Betrag ein, um einen garantierten BTC-Betrag zu erhalten";
+  String get amount_is_guaranteed => "Der Empfangsbetrag ist garantiert";
  @override
  String get auth_store_banned_for => "Gebannt für ";
  @override
@@ -1151,6 +1155,14 @@ class $de extends S {
  String get unconfirmed => 'Unbestätigt';
  @override
  String get displayable => 'Anzeigebar';
+  @override
+  String get fixed_rate => 'Fester Zinssatz';
+  @override
+  String get fixed_rate_alert => 'Sie können den Empfangsbetrag eingeben, wenn der Festpreismodus aktiviert ist. Möchten Sie in den Festpreismodus wechseln?';
+  @override
+  String get xlm_extra_info => 'Bitte vergessen Sie nicht, die Memo-ID anzugeben, während Sie die XLM-Transaktion für den Austausch senden';
+  @override
+  String get xrp_extra_info => 'Bitte vergessen Sie nicht, das Ziel-Tag anzugeben, während Sie die XRP-Transaktion für den Austausch senden';
 }

 class $hi extends S {
@@ -1292,7 +1304,7 @@ class $hi extends S {
  @override
  String get receive => "प्राप्त करना";
  @override
-  String get amount_is_guaranteed => "Xmr.to में, गारंटीशुदा BTC राशि प्राप्त करने के लिए, BTC राशि दर्ज करें और ऊपर XMR राशि नहीं";
+  String get amount_is_guaranteed => "प्राप्त राशि की गारंटी हैं";
  @override
  String get auth_store_banned_for => "के लिए प्रतिबंधित है ";
  @override
@@ -1907,6 +1919,14 @@ class $hi extends S {
  String get unconfirmed => 'अपुष्ट';
  @override
  String get displayable => 'प्रदर्शन योग्य';
+  @override
+  String get fixed_rate => 'निर्धारित दर';
+  @override
+  String get fixed_rate_alert => 'फिक्स्ड रेट मोड की जांच करने पर आप प्राप्त राशि दर्ज कर पाएंगे। क्या आप निश्चित दर मोड पर स्विच करना चाहते हैं?';
+  @override
+  String get xlm_extra_info => 'एक्सचेंज के लिए XLM ट्रांजेक्शन भेजते समय मेमो आईडी निर्दिष्ट करना न भूलें';
+  @override
+  String get xrp_extra_info => 'एक्सचेंज के लिए एक्सआरपी लेनदेन भेजते समय कृपया गंतव्य टैग निर्दिष्ट करना न भूलें';
 }

 class $ru extends S {
@@ -2048,7 +2068,7 @@ class $ru extends S {
  @override
  String get receive => "Получить";
  @override
-  String get amount_is_guaranteed => "В xmr.to, чтобы получить гарантированную сумму BTC, введите сумму BTC, а не сумму XMR выше";
+  String get amount_is_guaranteed => "Полученная сумма гарантирована";
  @override
  String get auth_store_banned_for => "Заблокировано на ";
  @override
@@ -2663,6 +2683,14 @@ class $ru extends S {
  String get unconfirmed => 'Неподтвержденный';
  @override
  String get displayable => 'Отображаемый';
+  @override
+  String get fixed_rate => 'Фиксированная ставка';
+  @override
+  String get fixed_rate_alert => 'Вы сможете ввести сумму получения тогда, когда будет установлен режим фиксированной ставки. Вы хотите перейти в режим фиксированной ставки?';
+  @override
+  String get xlm_extra_info => 'Не забудьте указать Memo ID (памятка) при отправке транзакции XLM для обмена';
+  @override
+  String get xrp_extra_info => 'Не забудьте указать целевой тег при отправке транзакции XRP для обмена';
 }

 class $ko extends S {
@@ -2804,7 +2832,7 @@ class $ko extends S {
  @override
  String get receive => "받다";
  @override
-  String get amount_is_guaranteed => "xmr.to에서 보장 된 BTC 금액을 받으려면 위의 XMR 금액이 아닌 BTC 금액을 입력하십시오.";
+  String get amount_is_guaranteed => "수령 금액이 보장됩니다.";
  @override
  String get auth_store_banned_for => "금지";
  @override
@@ -3419,6 +3447,14 @@ class $ko extends S {
  String get unconfirmed => '미확인';
  @override
  String get displayable => '표시 가능';
+  @override
+  String get fixed_rate => '고정 비율';
+  @override
+  String get fixed_rate_alert => '고정 금리 모드 체크시 수취 금액 입력이 가능합니다. 고정 속도 모드로 전환 하시겠습니까?';
+  @override
+  String get xlm_extra_info => '교환을 위해 XLM 거래를 보낼 때 메모 ID를 지정하는 것을 잊지 마십시오';
+  @override
+  String get xrp_extra_info => '교환을 위해 XRP 트랜잭션을 보내는 동안 대상 태그를 지정하는 것을 잊지 마십시오';
 }

 class $pt extends S {
@@ -3560,7 +3596,7 @@ class $pt extends S {
  @override
  String get receive => "Receber";
  @override
-  String get amount_is_guaranteed => "Em xmr.to, para receber um valor BTC garantido, insira o valor BTC e não o valor XMR acima";
+  String get amount_is_guaranteed => "O valor recebido é garantido";
  @override
  String get auth_store_banned_for => "Banido por";
  @override
@@ -4175,6 +4211,14 @@ class $pt extends S {
  String get unconfirmed => 'Não confirmado';
  @override
  String get displayable => 'Exibível';
+  @override
+  String get fixed_rate => 'Taxa fixa';
+  @override
+  String get fixed_rate_alert => 'Você poderá inserir a quantia recebida quando o modo de taxa fixa estiver marcado. Quer mudar para o modo de taxa fixa?';
+  @override
+  String get xlm_extra_info => 'Não se esqueça de especificar o Memo ID ao enviar a transação XLM para a troca';
+  @override
+  String get xrp_extra_info => 'Não se esqueça de especificar a etiqueta de destino ao enviar a transação XRP para a troca';
 }

 class $uk extends S {
@@ -4316,7 +4360,7 @@ class $uk extends S {
  @override
  String get receive => "Отримати";
  @override
-  String get amount_is_guaranteed => "У xmr.to, щоб отримати гарантовану суму BTC, введіть суму BTC, а не XMR вище";
+  String get amount_is_guaranteed => "Отримана сума є гарантованою";
  @override
  String get auth_store_banned_for => "Заблоковано на ";
  @override
@@ -4931,6 +4975,14 @@ class $uk extends S {
  String get unconfirmed => 'Непідтверджений';
  @override
  String get displayable => 'Відображуваний';
+  @override
+  String get fixed_rate => 'Фіксована ставка';
+  @override
+  String get fixed_rate_alert => 'Ви зможете ввести суму отримання тоді, коли буде встановлений режим фіксованої ставки. Ви хочете перейти в режим фіксованої ставки?';
+  @override
+  String get xlm_extra_info => "Будь ласка, не забудьте вказати ідентифікатор пам'ятки під час надсилання транзакції XLM для обміну";
+  @override
+  String get xrp_extra_info => 'Будь ласка, не забудьте вказати тег призначення під час надсилання XRP-транзакції для обміну';
 }

 class $ja extends S {
@@ -5072,7 +5124,7 @@ class $ja extends S {
  @override
  String get receive => "受け取る";
  @override
-  String get amount_is_guaranteed => "xmr.toで、保証されたBTC金額を受け取るには、上記のXMR金額ではなく、BTC金額を入力します";
+  String get amount_is_guaranteed => "受け取り金額は保証されています";
  @override
  String get auth_store_banned_for => "禁止されています ";
  @override
@@ -5687,6 +5739,14 @@ class $ja extends S {
  String get unconfirmed => '未確認';
  @override
  String get displayable => '表示可能';
+  @override
+  String get fixed_rate => '固定金利';
+  @override
+  String get fixed_rate_alert => '固定金利モードにチェックを入れると、受取額を入力できるようになります。 固定金利モードに切り替えますか？';
+  @override
+  String get xlm_extra_info => '交換用のXLMトランザクションを送信するときに、メモIDを指定することを忘れないでください';
+  @override
+  String get xrp_extra_info => '取引所のXRPトランザクションを送信するときに、宛先タグを指定することを忘れないでください';
 }

 class $en extends S {
@@ -5832,7 +5892,7 @@ class $pl extends S {
  @override
  String get receive => "Otrzymać";
  @override
-  String get amount_is_guaranteed => "W xmr.to, aby otrzymać gwarantowaną kwotę BTC, wprowadź kwotę BTC, a nie kwotę XMR powyżej";
+  String get amount_is_guaranteed => "Otrzymana kwota jest gwarantowana";
  @override
  String get auth_store_banned_for => "Bzbanowany za ";
  @override
@@ -6447,6 +6507,14 @@ class $pl extends S {
  String get unconfirmed => 'niepotwierdzony';
  @override
  String get displayable => 'Wyświetlane';
+  @override
+  String get fixed_rate => 'Stała stawka';
+  @override
+  String get fixed_rate_alert => 'Będziesz mógł wprowadzić kwotę otrzymaną, gdy zaznaczony jest tryb stałej stawki. Czy chcesz przejść do trybu stałej stawki?';
+  @override
+  String get xlm_extra_info => 'Nie zapomnij podać identyfikatora notatki podczas wysyłania transakcji XLM do wymiany';
+  @override
+  String get xrp_extra_info => 'Nie zapomnij podać tagu docelowego podczas wysyłania transakcji XRP do wymiany';
 }

 class $es extends S {
@@ -6588,7 +6656,7 @@ class $es extends S {
  @override
  String get receive => "Recibir";
  @override
-  String get amount_is_guaranteed => "En xmr.to, para recibir una cantidad BTC garantizada, ingrese la cantidad BTC y no la cantidad XMR arriba";
+  String get amount_is_guaranteed => "La cantidad recibida está garantizada";
  @override
  String get auth_store_banned_for => "Prohibido para ";
  @override
@@ -7203,6 +7271,14 @@ class $es extends S {
  String get unconfirmed => 'inconfirmado';
  @override
  String get displayable => 'Visualizable';
+  @override
+  String get fixed_rate => 'Tipo de interés fijo';
+  @override
+  String get fixed_rate_alert => 'Podrá ingresar la cantidad recibida cuando el modo de tarifa fija esté marcado. ¿Quieres cambiar al modo de tarifa fija?';
+  @override
+  String get xlm_extra_info => 'No olvide especificar el ID de nota al enviar la transacción XLM para el intercambio';
+  @override
+  String get xrp_extra_info => 'No olvide especificar la etiqueta de destino al enviar la transacción XRP para el intercambio';
 }

 class $nl extends S {
@@ -7344,7 +7420,7 @@ class $nl extends S {
  @override
  String get receive => "Krijgen";
  @override
-  String get amount_is_guaranteed => "Om een gegarandeerd BTC-bedrag te ontvangen, voert u in xmr.to het BTC-bedrag in en niet het bovenstaande XMR-bedrag";
+  String get amount_is_guaranteed => "Het ontvangen bedrag is gegarandeerd";
  @override
  String get auth_store_banned_for => "Verboden voor ";
  @override
@@ -7959,6 +8035,14 @@ class $nl extends S {
  String get unconfirmed => 'niet bevestigd';
  @override
  String get displayable => 'Weer te geven';
+  @override
+  String get fixed_rate => 'Vast tarief';
+  @override
+  String get fixed_rate_alert => 'U kunt het ontvangen bedrag invoeren wanneer de modus voor vaste tarieven is aangevinkt. Wilt u overschakelen naar de vaste-tariefmodus?';
+  @override
+  String get xlm_extra_info => 'Vergeet niet om de Memo-ID op te geven tijdens het verzenden van de XLM-transactie voor de uitwisseling';
+  @override
+  String get xrp_extra_info => 'Vergeet niet om de Destination Tag op te geven tijdens het verzenden van de XRP-transactie voor de uitwisseling';
 }

 class $zh extends S {
@@ -8100,7 +8184,7 @@ class $zh extends S {
  @override
  String get receive => "接收";
  @override
-  String get amount_is_guaranteed => "在xmr.to中，要接收保证的BTC数量，请输入BTC数量，而不要输入上方的XMR数量";
+  String get amount_is_guaranteed => "接收金額有保證";
  @override
  String get auth_store_banned_for => "禁止 ";
  @override
@@ -8715,6 +8799,14 @@ class $zh extends S {
  String get unconfirmed => '未经证实';
  @override
  String get displayable => '可显示';
+  @override
+  String get fixed_rate => '固定利率';
+  @override
+  String get fixed_rate_alert => '選中固定費率模式後，您將可以輸入接收金額。 您要切換到固定速率模式嗎？';
+  @override
+  String get xlm_extra_info => '發送用於交換的XLM交易時，請不要忘記指定備忘錄ID';
+  @override
+  String get xrp_extra_info => '發送用於交換的XRP交易時，請不要忘記指定目標標記';
 }

 class GeneratedLocalizationsDelegate extends LocalizationsDelegate<S> {
@@ -1,6 +1,8 @@
 import 'dart:ui';
 import 'package:cake_wallet/entities/sync_status.dart';
 import 'package:cake_wallet/entities/wallet_type.dart';
+import 'package:cake_wallet/exchange/changenow/changenow_exchange_provider.dart';
+import 'package:cake_wallet/src/widgets/standard_checkbox.dart';
 import 'package:dotted_border/dotted_border.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
@@ -37,6 +39,7 @@ class ExchangePage extends BasePage {
  final ExchangeViewModel exchangeViewModel;
  final depositKey = GlobalKey<ExchangeCardState>();
  final receiveKey = GlobalKey<ExchangeCardState>();
+  final checkBoxKey = GlobalKey<StandardCheckboxState>();
  final _formKey = GlobalKey<FormState>();
  final _depositAmountFocus = FocusNode();
  final _receiveAmountFocus = FocusNode();
@@ -115,7 +118,7 @@ class ExchangePage extends BasePage {
              key: _formKey,
              child: ScrollableWithBottomSection(
                contentPadding: EdgeInsets.only(bottom: 24),
-                content: Column(
+                content: Observer(builder: (_) => Column(
                  children: <Widget>[
                    Container(
                      padding: EdgeInsets.only(bottom: 32),
@@ -165,22 +168,22 @@ class ExchangePage extends BasePage {
                                hasAllAmount: exchangeViewModel.hasAllAmount,
                                allAmount: exchangeViewModel.hasAllAmount
                                    ? () => exchangeViewModel
-                                        .calculateDepositAllAmount()
+                                    .calculateDepositAllAmount()
                                    : null,
                                amountFocusNode: _depositAmountFocus,
                                key: depositKey,
                                title: S.of(context).you_will_send,
                                initialCurrency:
-                                    exchangeViewModel.depositCurrency,
+                                exchangeViewModel.depositCurrency,
                                initialWalletName: depositWalletName,
                                initialAddress:
-                                    exchangeViewModel.depositCurrency ==
-                                            exchangeViewModel.wallet.currency
-                                        ? exchangeViewModel.wallet.address
-                                        : exchangeViewModel.depositAddress,
+                                exchangeViewModel.depositCurrency ==
+                                    exchangeViewModel.wallet.currency
+                                    ? exchangeViewModel.wallet.address
+                                    : exchangeViewModel.depositAddress,
                                initialIsAmountEditable: true,
                                initialIsAddressEditable:
-                                    exchangeViewModel.isDepositAddressEnabled,
+                                exchangeViewModel.isDepositAddressEnabled,
                                isAmountEstimated: false,
                                hasRefundAddress: true,
                                currencies: CryptoCurrency.all,
@@ -211,7 +214,7 @@ class ExchangePage extends BasePage {
                                imageArrow: arrowBottomPurple,
                                currencyButtonColor: Colors.transparent,
                                addressButtonsColor:
-                                    Theme.of(context).focusColor,
+                                Theme.of(context).focusColor,
                                borderColor: Theme.of(context)
                                    .primaryTextTheme
                                    .body2
@@ -225,52 +228,65 @@ class ExchangePage extends BasePage {
                          ),
                          Padding(
                            padding:
-                                EdgeInsets.only(top: 29, left: 24, right: 24),
+                            EdgeInsets.only(top: 29, left: 24, right: 24),
                            child: Observer(
                                builder: (_) => ExchangeCard(
-                                      amountFocusNode: _receiveAmountFocus,
-                                      key: receiveKey,
-                                      title: S.of(context).you_will_get,
-                                      initialCurrency:
-                                          exchangeViewModel.receiveCurrency,
-                                      initialWalletName: receiveWalletName,
-                                      initialAddress: exchangeViewModel
-                                                  .receiveCurrency ==
-                                              exchangeViewModel.wallet.currency
-                                          ? exchangeViewModel.wallet.address
-                                          : exchangeViewModel.receiveAddress,
-                                      initialIsAmountEditable: exchangeViewModel
-                                              .provider is XMRTOExchangeProvider
-                                          ? true
-                                          : false,
-                                      initialIsAddressEditable:
-                                          exchangeViewModel
-                                              .isReceiveAddressEnabled,
-                                      isAmountEstimated: true,
-                                      currencies: CryptoCurrency.all,
-                                      onCurrencySelected: (currency) =>
-                                          exchangeViewModel
-                                              .changeReceiveCurrency(
-                                                  currency: currency),
-                                      imageArrow: arrowBottomCakeGreen,
-                                      currencyButtonColor: Colors.transparent,
-                                      addressButtonsColor:
-                                          Theme.of(context).focusColor,
-                                      borderColor: Theme.of(context)
-                                          .primaryTextTheme
-                                          .body2
-                                          .decorationColor,
-                                      currencyValueValidator: AmountValidator(
-                                          type: exchangeViewModel.wallet.type),
-                                      addressTextFieldValidator:
-                                          AddressValidator(
-                                              type: exchangeViewModel
-                                                  .receiveCurrency),
-                                    )),
+                                  amountFocusNode: _receiveAmountFocus,
+                                  key: receiveKey,
+                                  title: S.of(context).you_will_get,
+                                  initialCurrency:
+                                  exchangeViewModel.receiveCurrency,
+                                  initialWalletName: receiveWalletName,
+                                  initialAddress: exchangeViewModel
+                                      .receiveCurrency ==
+                                      exchangeViewModel.wallet.currency
+                                      ? exchangeViewModel.wallet.address
+                                      : exchangeViewModel.receiveAddress,
+                                  initialIsAmountEditable: exchangeViewModel
+                                      .isReceiveAmountEditable,
+                                  initialIsAddressEditable:
+                                  exchangeViewModel
+                                      .isReceiveAddressEnabled,
+                                  isAmountEstimated: true,
+                                  currencies: CryptoCurrency.all,
+                                  onCurrencySelected: (currency) =>
+                                      exchangeViewModel
+                                          .changeReceiveCurrency(
+                                          currency: currency),
+                                  imageArrow: arrowBottomCakeGreen,
+                                  currencyButtonColor: Colors.transparent,
+                                  addressButtonsColor:
+                                  Theme.of(context).focusColor,
+                                  borderColor: Theme.of(context)
+                                      .primaryTextTheme
+                                      .body2
+                                      .decorationColor,
+                                  currencyValueValidator: AmountValidator(
+                                      type: exchangeViewModel.wallet.type),
+                                  addressTextFieldValidator:
+                                  AddressValidator(
+                                      type: exchangeViewModel
+                                          .receiveCurrency),
+                                )),
                          )
                        ],
                      ),
                    ),
+                    if (exchangeViewModel.isReceiveAmountEditable) Padding(
+                        padding: EdgeInsets.only(top: 12, left: 24),
+                        child: Row(
+                          mainAxisAlignment: MainAxisAlignment.start,
+                          children: [
+                            StandardCheckbox(
+                              key: checkBoxKey,
+                              value: exchangeViewModel.isFixedRateMode,
+                              caption: S.of(context).fixed_rate,
+                              onChanged: (value) =>
+                              exchangeViewModel.isFixedRateMode = value,
+                            ),
+                          ],
+                        )
+                    ),
                    Padding(
                      padding: EdgeInsets.only(top: 30, left: 24, bottom: 24),
                      child: Row(
@@ -302,7 +318,7 @@ class ExchangePage extends BasePage {
                                      .pushNamed(Routes.exchangeTemplate),
                                  child: Container(
                                    padding:
-                                        EdgeInsets.only(left: 1, right: 10),
+                                    EdgeInsets.only(left: 1, right: 10),
                                    child: DottedBorder(
                                        borderType: BorderType.RRect,
                                        dashPattern: [6, 4],
@@ -369,23 +385,23 @@ class ExchangePage extends BasePage {
                                                          .of(context)
                                                          .confirm_delete_template,
                                                      rightButtonText:
-                                                          S.of(context).delete,
+                                                      S.of(context).delete,
                                                      leftButtonText:
-                                                          S.of(context).cancel,
+                                                      S.of(context).cancel,
                                                      actionRightButton: () {
                                                        Navigator.of(
-                                                                dialogContext)
+                                                            dialogContext)
                                                            .pop();
                                                        exchangeViewModel
                                                            .removeTemplate(
-                                                                template:
-                                                                    template);
+                                                            template:
+                                                            template);
                                                        exchangeViewModel
                                                            .updateTemplate();
                                                      },
                                                      actionLeftButton: () =>
                                                          Navigator.of(
-                                                                  dialogContext)
+                                                              dialogContext)
                                                              .pop());
                                                });
                                          },
@@ -395,15 +411,14 @@ class ExchangePage extends BasePage {
                              ],
                            )))
                  ],
-                ),
+                )),
                bottomSectionPadding:
                    EdgeInsets.only(left: 24, right: 24, bottom: 24),
                bottomSection: Column(children: <Widget>[
                  Padding(
                    padding: EdgeInsets.only(bottom: 15),
                    child: Observer(builder: (_) {
-                      final description =
-                          exchangeViewModel.provider is XMRTOExchangeProvider
+                      final description = exchangeViewModel.isFixedRateMode
                              ? S.of(context).amount_is_guaranteed
                              : S.of(context).amount_is_estimate;
                      return Center(
@@ -464,17 +479,9 @@ class ExchangePage extends BasePage {
        currency: CryptoCurrency.fromString(template.receiveCurrency));

    switch (template.provider) {
-      case 'XMR.TO':
-        exchangeViewModel.changeProvider(
-            provider: exchangeViewModel.providerList[0]);
-        break;
      case 'ChangeNOW':
        exchangeViewModel.changeProvider(
-            provider: exchangeViewModel.providerList[1]);
-        break;
-      case 'MorphToken':
-        exchangeViewModel.changeProvider(
-            provider: exchangeViewModel.providerList[2]);
+            provider: exchangeViewModel.providerList[0]);
        break;
    }

@@ -482,6 +489,7 @@ class ExchangePage extends BasePage {
    exchangeViewModel.depositAddress = template.depositAddress;
    exchangeViewModel.receiveAddress = template.receiveAddress;
    exchangeViewModel.isReceiveAmountEntered = false;
+    exchangeViewModel.isFixedRateMode = false;
  }

  void _setReactions(
@@ -566,10 +574,10 @@ class ExchangePage extends BasePage {
      receiveKey.currentState.isAddressEditable(isEditable: isEnabled);
    });

-    reaction((_) => exchangeViewModel.provider, (ExchangeProvider provider) {
-      provider is XMRTOExchangeProvider
-          ? receiveKey.currentState.isAmountEditable(isEditable: true)
-          : receiveKey.currentState.isAmountEditable(isEditable: false);
+    reaction((_) => exchangeViewModel.isReceiveAmountEditable,
+        (bool isReceiveAmountEditable) {
+      receiveKey.currentState
+          .isAmountEditable(isEditable: isReceiveAmountEditable);
    });

    reaction((_) => exchangeViewModel.tradeState, (ExchangeTradeState state) {
@@ -647,6 +655,45 @@ class ExchangePage extends BasePage {
      }
    });

+    _receiveAmountFocus.addListener(() {
+      if (_receiveAmountFocus.hasFocus && !exchangeViewModel.isFixedRateMode) {
+        showPopUp<void>(
+            context: context,
+            builder: (BuildContext context) {
+              return AlertWithTwoActions(
+                  alertTitle: S.of(context).exchange,
+                  alertContent: S.of(context).fixed_rate_alert,
+                  leftButtonText: S.of(context).cancel,
+                  rightButtonText: S.of(context).ok,
+                  actionLeftButton: () {
+                    FocusScope.of(context).unfocus();
+                    Navigator.of(context).pop();
+                  },
+                  actionRightButton: () {
+                    exchangeViewModel.isFixedRateMode = true;
+                    checkBoxKey.currentState
+                        .changeValue(exchangeViewModel.isFixedRateMode);
+                    Navigator.of(context).pop();
+                  });
+            });
+      }
+    });
+
+    reaction((_) => exchangeViewModel.isFixedRateMode, (bool isFixedRateMode) {
+      if ((_receiveAmountFocus.hasFocus ||
+           exchangeViewModel.isReceiveAmountEntered) && !isFixedRateMode) {
+        FocusScope.of(context).unfocus();
+        receiveAmountController.text = '';
+      } else {
+        exchangeViewModel.changeDepositAmount(
+            amount: depositAmountController.text);
+      }
+
+      checkBoxKey.currentState
+          .changeValue(exchangeViewModel.isFixedRateMode);
+      exchangeViewModel.loadLimits();
+    });
+
    _isReactionsSet = true;
  }

@@ -28,9 +28,11 @@ void showInformation(

  final information = exchangeTradeViewModel.isSendable
      ? S.current.exchange_result_confirm(
-          trade.amount ?? fetchingLabel, trade.from.toString(), walletName)
+          trade.amount ?? fetchingLabel, trade.from.toString(), walletName) +
+        exchangeTradeViewModel.extraInfo
      : S.current.exchange_result_description(
-          trade.amount ?? fetchingLabel, trade.from.toString());
+          trade.amount ?? fetchingLabel, trade.from.toString()) +
+        exchangeTradeViewModel.extraInfo;

  showPopUp<void>(
      context: context,
@@ -148,6 +150,7 @@ class ExchangeTradeState extends State<ExchangeTradeForm> {
                                  padding: EdgeInsets.all(5),
                                  decoration: BoxDecoration(
                                      border: Border.all(
+                                          width: 3,
                                          color: Theme.of(context)
                                              .accentTextTheme
                                              .subtitle
@@ -48,6 +48,7 @@ class QRWidget extends StatelessWidget {
                            padding: EdgeInsets.all(5),
                            decoration: BoxDecoration(
                                border: Border.all(
+                                    width: 3,
                                    color: Theme.of(context).accentTextTheme.
                                    display3.backgroundColor
                                )
@@ -4,9 +4,10 @@ import 'package:flutter/material.dart';

 class StandardCheckbox extends StatefulWidget {
  StandardCheckbox({
+    Key key,
    @required this.value,
    this.caption = '',
-    @required this.onChanged});
+    @required this.onChanged}) : super(key: key);

  final bool value;
  final String caption;
@@ -24,6 +25,10 @@ class StandardCheckboxState extends State<StandardCheckbox> {
  String caption;
  Function(bool) onChanged;

+  void changeValue(bool newValue) {
+    setState(() => value = newValue);
+  }
+
  @override
  Widget build(BuildContext context) {
    return GestureDetector(
@@ -59,6 +59,13 @@ abstract class ExchangeTradeViewModelBase with Store {
  @observable
  bool isSendable;

+  @computed
+  String get extraInfo => trade.from == CryptoCurrency.xlm
+  ? '\n\n' + S.current.xlm_extra_info
+  : trade.from == CryptoCurrency.xrp
+    ? '\n\n' + S.current.xrp_extra_info
+    : '';
+
  @observable
  ObservableList<ExchangeTradeItem> items;

@@ -57,7 +57,8 @@ abstract class ExchangeViewModelBase with Store {
        _onPairChange();
      }
    });
-
+    _defineIsReceiveAmountEditable();
+    isFixedRateMode = false;
    isReceiveAmountEntered = false;
    loadLimits();
  }
@@ -106,6 +107,12 @@ abstract class ExchangeViewModelBase with Store {
  @observable
  bool isReceiveAmountEntered;

+  @observable
+  bool isReceiveAmountEditable;
+
+  @observable
+  bool isFixedRateMode;
+
  @computed
  SyncStatus get status => wallet.syncStatus;

@@ -127,12 +134,15 @@ abstract class ExchangeViewModelBase with Store {
    this.provider = provider;
    depositAmount = '';
    receiveAmount = '';
+    isFixedRateMode = false;
+    _defineIsReceiveAmountEditable();
    loadLimits();
  }

  @action
  void changeDepositCurrency({CryptoCurrency currency}) {
    depositCurrency = currency;
+    isFixedRateMode = false;
    _onPairChange();
    isDepositAddressEnabled = !(depositCurrency == wallet.currency);
    isReceiveAddressEnabled = !(receiveCurrency == wallet.currency);
@@ -141,6 +151,7 @@ abstract class ExchangeViewModelBase with Store {
  @action
  void changeReceiveCurrency({CryptoCurrency currency}) {
    receiveCurrency = currency;
+    isFixedRateMode = false;
    _onPairChange();
    isDepositAddressEnabled = !(depositCurrency == wallet.currency);
    isReceiveAddressEnabled = !(receiveCurrency == wallet.currency);
@@ -160,9 +171,10 @@ abstract class ExchangeViewModelBase with Store {

    provider
        .calculateAmount(
-            from: depositCurrency,
-            to: receiveCurrency,
+            from: receiveCurrency,
+            to: depositCurrency,
            amount: _amount,
+            isFixedRateMode: isFixedRateMode,
            isReceiveAmount: true)
        .then((amount) => _cryptoNumberFormat
            .format(amount)
@@ -187,6 +199,7 @@ abstract class ExchangeViewModelBase with Store {
            from: depositCurrency,
            to: receiveCurrency,
            amount: _amount,
+            isFixedRateMode: isFixedRateMode,
            isReceiveAmount: false)
        .then((amount) => _cryptoNumberFormat
            .format(amount)
@@ -200,8 +213,8 @@ abstract class ExchangeViewModelBase with Store {
    limitsState = LimitsIsLoading();

    try {
-      limits = await provider.fetchLimits(
-          from: depositCurrency, to: receiveCurrency);
+      limits = await provider.fetchLimits(from: depositCurrency,
+          to: receiveCurrency, isFixedRateMode: isFixedRateMode);
      limitsState = LimitsLoadedSuccessfully(limits: limits);
    } catch (e) {
      limitsState = LimitsLoadedFailure(error: e.toString());
@@ -265,7 +278,8 @@ abstract class ExchangeViewModelBase with Store {
      } else {
        try {
          tradeState = TradeIsCreating();
-          final trade = await provider.createTrade(request: request);
+          final trade = await provider.createTrade(request: request,
+              isFixedRateMode: isFixedRateMode);
          trade.walletId = wallet.id;
          tradesStore.setTrade(trade);
          await trades.add(trade);
@@ -285,15 +299,15 @@ abstract class ExchangeViewModelBase with Store {

  @action
  void reset() {
+    _initialPairBasedOnWallet();
    isReceiveAmountEntered = false;
    depositAmount = '';
    receiveAmount = '';
-    depositCurrency = CryptoCurrency.xmr;
-    receiveCurrency = CryptoCurrency.btc;
    depositAddress = depositCurrency == wallet.currency ? wallet.address : '';
    receiveAddress = receiveCurrency == wallet.currency ? wallet.address : '';
    isDepositAddressEnabled = !(depositCurrency == wallet.currency);
    isReceiveAddressEnabled = !(receiveCurrency == wallet.currency);
+    isFixedRateMode = false;
    _onPairChange();
  }

@@ -364,7 +378,7 @@ abstract class ExchangeViewModelBase with Store {
      }
    }

-    depositAddress = depositCurrency == wallet.currency ? wallet.address : '';
+    _defineIsReceiveAmountEditable();
    depositAmount = '';
    receiveAmount = '';
    loadLimits();
@@ -389,4 +403,14 @@ abstract class ExchangeViewModelBase with Store {
        break;
    }
  }
+
+  void _defineIsReceiveAmountEditable() {
+    if ((provider is ChangeNowExchangeProvider)
+        &&(depositCurrency == CryptoCurrency.xmr)
+        &&(receiveCurrency == CryptoCurrency.btc)) {
+      isReceiveAmountEditable = true;
+    } else {
+      isReceiveAmountEditable = false;
+    }
+  }
 }