CAKE-306 | fixed moonpay_buy_provider.dart; added onEnabled() method to moonpay_buy_provider.dart; checked is MoonPayBuyProvider enabled; added isMoonPayEnabled to settings_store.dart

lib/buy/buy_amount.dart

@@ -1,8 +1,12 @@
 import 'package:flutter/foundation.dart';
 
 class BuyAmount {
-  BuyAmount({@required this.sourceAmount, @required this.destAmount});
+  BuyAmount({
+    @required this.sourceAmount,
+    @required this.destAmount,
+    this.minAmount = 0});
 
   final double sourceAmount;
   final double destAmount;
+  final int minAmount;
 }

lib/buy/moonpay/moonpay_buy_provider.dart

@@ -1,4 +1,5 @@
 import 'dart:convert';
+import 'package:crypto/crypto.dart';
 import 'package:cake_wallet/buy/buy_exception.dart';
 import 'package:http/http.dart';
 import 'package:cake_wallet/buy/buy_amount.dart';
@@ -13,17 +14,18 @@ import 'package:cake_wallet/.secrets.g.dart' as secrets;
 class MoonPayBuyProvider extends BuyProvider {
   MoonPayBuyProvider({WalletBase wallet, bool isTestEnvironment = false})
       : super(wallet: wallet, isTestEnvironment: isTestEnvironment) {
-      baseApiUrl = isTestEnvironment
+      baseUrl = isTestEnvironment ? _baseTestUrl : _baseProductUrl;
-        ? _baseTestApiUrl
-        : _baseProductApiUrl;
   }
 
-  static const _baseTestApiUrl = 'https://buy-staging.moonpay.com';
+  static const _baseTestUrl = 'https://buy-staging.moonpay.com';
-  static const _baseProductApiUrl = 'https://api.moonpay.com';
+  static const _baseProductUrl = 'https://buy.moonpay.com';
+  static const _apiUrl = 'https://api.moonpay.com';
   static const _currenciesSuffix = '/v3/currencies';
   static const _quoteSuffix = '/buy_quote';
   static const _transactionsSuffix = '/v1/transactions';
+  static const _countrySuffix = '/v3/countries';
   static const _apiKey = secrets.moonPayApiKey;
+  static const _secretKey = secrets.moonPaySecretKey;
 
   @override
   String get title => 'MoonPay';
@@ -35,9 +37,9 @@ class MoonPayBuyProvider extends BuyProvider {
     walletTypeToCryptoCurrency(walletType).title.toLowerCase();
 
   @override
-  String get trackUrl => baseApiUrl + '/transaction_receipt?transactionId=';
+  String get trackUrl => baseUrl + '/transaction_receipt?transactionId=';
 
-  String baseApiUrl;
+  String baseUrl;
 
   @override
   Future<String> requestUrl(String amount, String sourceCurrency) async {
@@ -45,22 +47,32 @@ class MoonPayBuyProvider extends BuyProvider {
         'credit_debit_card%2Capple_pay%2Cgoogle_pay%2Csamsung_pay'
         '%2Csepa_bank_transfer%2Cgbp_bank_transfer%2Cgbp_open_banking_payment';
 
-    final originalUrl = baseApiUrl + '?apiKey=' + _apiKey + '&currencyCode=' +
+    final suffix = '?apiKey=' + _apiKey + '&currencyCode=' +
         currencyCode + '&enabledPaymentMethods=' + enabledPaymentMethods +
         '&walletAddress=' + walletAddress +
         '&baseCurrencyCode=' + sourceCurrency.toLowerCase() +
         '&baseCurrencyAmount=' + amount + '&lockAmount=true' +
         '&showAllCurrencies=false' + '&showWalletAddressForm=false';
 
-    return originalUrl;
+    final originalUrl = baseUrl + suffix;
+
+    final messageBytes = utf8.encode(suffix);
+    final key = utf8.encode(_secretKey);
+    final hmac = Hmac(sha256, key);
+    final digest = hmac.convert(messageBytes);
+    final signature = base64.encode(digest.bytes);
+    final urlWithSignature = originalUrl +
+          '&signature=${Uri.encodeComponent(signature)}';
+
+    return isTestEnvironment ? originalUrl : urlWithSignature;
   }
 
   @override
   Future<BuyAmount> calculateAmount(String amount, String sourceCurrency) async {
-    final url = _baseProductApiUrl + _currenciesSuffix + '/$currencyCode' +
+    final url = _apiUrl + _currenciesSuffix + '/$currencyCode' +
         _quoteSuffix + '/?apiKey=' + _apiKey +
         '&baseCurrencyAmount=' + amount +
-        '&baseCurrencyCode' + sourceCurrency.toLowerCase();
+        '&baseCurrencyCode=' + sourceCurrency.toLowerCase();
 
     final response = await get(url);
 
@@ -73,13 +85,17 @@ class MoonPayBuyProvider extends BuyProvider {
     final responseJSON = json.decode(response.body) as Map<String, dynamic>;
     final sourceAmount = responseJSON['totalAmount'] as double;
     final destAmount = responseJSON['quoteCurrencyAmount'] as double;
+    final minSourceAmount = responseJSON['baseCurrency']['minAmount'] as int;
 
-    return BuyAmount(sourceAmount: sourceAmount, destAmount: destAmount);
+    return BuyAmount(
+        sourceAmount: sourceAmount,
+        destAmount: destAmount,
+        minAmount: minSourceAmount);
   }
 
   @override
   Future<Order> findOrderById(String id) async {
-    final url = _baseProductApiUrl + _transactionsSuffix + '/$id' +
+    final url = _apiUrl + _transactionsSuffix + '/$id' +
         '?apiKey=' + _apiKey;
 
     final response = await get(url);
@@ -108,4 +124,29 @@ class MoonPayBuyProvider extends BuyProvider {
         walletId: walletId
     );
   }
+
+  static Future<bool> onEnabled(String deviceCountryCode) async {
+    final url = _apiUrl + _countrySuffix;
+    var isBuyEnable = false;
+
+    final response = await get(url);
+
+    try {
+      final responseJSON = json.decode(response.body) as List<dynamic>;
+
+      for (var element in responseJSON) {
+        final countryMap = element as Map<String, dynamic>;
+        final countryCode = countryMap['alpha2'] as String;
+        if (countryCode == deviceCountryCode) {
+          isBuyEnable = countryMap['isBuyAllowed'] as bool;
+          break;
+        }
+      }
+    } catch (e) {
+      isBuyEnable = false;
+      print(e.toString());
+    }
+
+    return isBuyEnable;
+  }
 }

lib/di.dart

@@ -1,5 +1,6 @@
 import 'package:cake_wallet/bitcoin/bitcoin_wallet_service.dart';
 import 'package:cake_wallet/bitcoin/litecoin_wallet_service.dart';
+import 'package:cake_wallet/buy/moonpay/moonpay_buy_provider.dart';
 import 'package:cake_wallet/core/backup_service.dart';
 import 'package:cake_wallet/core/wallet_service.dart';
 import 'package:cake_wallet/entities/biometric_auth.dart';
@@ -91,6 +92,7 @@ import 'package:cake_wallet/view_model/wallet_list/wallet_list_view_model.dart';
 import 'package:cake_wallet/view_model/wallet_restore_view_model.dart';
 import 'package:cake_wallet/view_model/wallet_seed_view_model.dart';
 import 'package:cake_wallet/view_model/exchange/exchange_view_model.dart';
+import 'package:devicelocale/devicelocale.dart';
 import 'package:flutter/widgets.dart';
 import 'package:get_it/get_it.dart';
 import 'package:hive/hive.dart';
@@ -152,8 +154,14 @@ Future setup(
   final isBitcoinBuyEnabled = (secrets.wyreSecretKey?.isNotEmpty ?? false) &&
       (secrets.wyreApiKey?.isNotEmpty ?? false) &&
       (secrets.wyreAccountId?.isNotEmpty ?? false);
+
+  final locale = await Devicelocale.currentLocale;
+  final deviceCountryCode = locale.split('_').last;
+  final isMoonPayEnabled = await MoonPayBuyProvider.onEnabled(deviceCountryCode);
+
   final settingsStore = await SettingsStoreBase.load(
-      nodeSource: _nodeSource, isBitcoinBuyEnabled: isBitcoinBuyEnabled);
+      nodeSource: _nodeSource, isBitcoinBuyEnabled: isBitcoinBuyEnabled,
+      isMoonPayEnabled: isMoonPayEnabled);
 
   if (_isSetupFinished) {
     return;
@@ -541,7 +549,8 @@ Future setup(
     final wallet = getIt.get<AppStore>().wallet;
 
     return BuyViewModel(_ordersSource, getIt.get<OrdersStore>(),
-        getIt.get<BuyAmountViewModel>(), wallet: wallet);
+        getIt.get<SettingsStore>(), getIt.get<BuyAmountViewModel>(),
+        wallet: wallet);
   });
 
   getIt.registerFactory(() {

lib/src/screens/buy/pre_order_page.dart

@@ -1,7 +1,11 @@
 import 'dart:ui';
 import 'package:cake_wallet/buy/buy_amount.dart';
+import 'package:cake_wallet/buy/buy_provider.dart';
+import 'package:cake_wallet/buy/moonpay/moonpay_buy_provider.dart';
 import 'package:cake_wallet/src/screens/buy/widgets/buy_list_item.dart';
+import 'package:cake_wallet/src/widgets/alert_with_one_action.dart';
 import 'package:cake_wallet/src/widgets/keyboard_done_button.dart';
+import 'package:cake_wallet/utils/show_pop_up.dart';
 import 'package:cake_wallet/view_model/buy/buy_view_model.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
@@ -172,13 +176,16 @@ class PreOrderPage extends BasePage {
                         builder: (context, AsyncSnapshot<BuyAmount> snapshot) {
                           double sourceAmount;
                           double destAmount;
+                          int minAmount;
 
                           if (snapshot.hasData) {
                             sourceAmount = snapshot.data.sourceAmount;
                             destAmount = snapshot.data.destAmount;
+                            minAmount = snapshot.data.minAmount;
                           } else {
                             sourceAmount = 0.0;
                             destAmount = 0.0;
+                            minAmount = 0;
                           }
 
                           return Padding(
@@ -192,14 +199,15 @@ class PreOrderPage extends BasePage {
                                     sourceCurrency: buyViewModel.fiatCurrency,
                                     destAmount: destAmount,
                                     destCurrency: buyViewModel.cryptoCurrency,
-                                    onTap:
+                                    onTap: ((buyViewModel.buyAmountViewModel
-                                    buyViewModel.buyAmountViewModel
+                                        .doubleAmount != 0.0) &&
-                                        .doubleAmount == 0.0 ? null : () {
+                                        (snapshot.hasData)) ? () =>
-                                      buyViewModel.selectedProvider = item.provider;
+                                        onSelectBuyProvider(
-                                      sourceAmount > 0
+                                          context: context,
-                                        ? buyViewModel.isDisabled = false
+                                          provider: item.provider,
-                                        : buyViewModel.isDisabled = true;
+                                          sourceAmount: sourceAmount,
-                                    }
+                                          minAmount: minAmount
+                                        ) : null
                                 );
                               })
                           );
@@ -242,4 +250,26 @@ class PreOrderPage extends BasePage {
       )
     );
   }
+
+  void onSelectBuyProvider({BuildContext context, BuyProvider provider,
+    double sourceAmount, int minAmount}) {
+
+    if ((provider is MoonPayBuyProvider)&&
+        (buyViewModel.buyAmountViewModel.doubleAmount < minAmount)) {
+      showPopUp<void>(
+          context: context,
+          builder: (BuildContext context) {
+            return AlertWithOneAction(
+                alertTitle: 'MoonPay',
+                alertContent: 'Value of the amount must be more than $minAmount ${buyViewModel.fiatCurrency.toString()}',
+                buttonText: S.of(context).ok,
+                buttonAction: () => Navigator.of(context).pop());
+          });
+      return;
+    }
+    buyViewModel.selectedProvider = provider;
+    sourceAmount > 0
+        ? buyViewModel.isDisabled = false
+        : buyViewModel.isDisabled = true;
+  }
 }

lib/store/settings_store.dart

@@ -1,4 +1,5 @@
 import 'package:cake_wallet/bitcoin/bitcoin_transaction_priority.dart';
+import 'package:cake_wallet/buy/moonpay/moonpay_buy_provider.dart';
 import 'package:cake_wallet/entities/preferences_key.dart';
 import 'package:cake_wallet/entities/transaction_priority.dart';
 import 'package:cake_wallet/themes/theme_base.dart';
@@ -18,6 +19,7 @@ import 'package:cake_wallet/entities/fiat_currency.dart';
 import 'package:cake_wallet/entities/node.dart';
 import 'package:cake_wallet/entities/monero_transaction_priority.dart';
 import 'package:cake_wallet/entities/action_list_display_mode.dart';
+import 'package:cake_wallet/.secrets.g.dart' as secrets;
 
 part 'settings_store.g.dart';
 
@@ -39,6 +41,7 @@ abstract class SettingsStoreBase with Store {
       @required TransactionPriority initialBitcoinTransactionPriority,
       @required TransactionPriority initialMoneroTransactionPriority,
       @required this.isBitcoinBuyEnabled,
+      @required this.isMoonPayEnabled,
       this.actionlistDisplayMode}) {
     fiatCurrency = initialFiatCurrency;
     balanceDisplayMode = initialBalanceDisplayMode;
@@ -147,9 +150,12 @@ abstract class SettingsStoreBase with Store {
 
   bool isBitcoinBuyEnabled;
 
+  bool isMoonPayEnabled;
+
   static Future<SettingsStore> load(
       {@required Box<Node> nodeSource,
       @required bool isBitcoinBuyEnabled,
+      @required bool isMoonPayEnabled,
       FiatCurrency initialFiatCurrency = FiatCurrency.usd,
       MoneroTransactionPriority initialMoneroTransactionPriority =
           MoneroTransactionPriority.slow,
@@ -221,6 +227,7 @@ abstract class SettingsStoreBase with Store {
         },
         appVersion: packageInfo.version,
         isBitcoinBuyEnabled: isBitcoinBuyEnabled,
+        isMoonPayEnabled: isMoonPayEnabled,
         initialFiatCurrency: currentFiatCurrency,
         initialBalanceDisplayMode: currentBalanceDisplayMode,
         initialSaveRecipientAddress: shouldSaveRecipientAddress,
@@ -242,8 +249,18 @@ abstract class SettingsStoreBase with Store {
           BitcoinTransactionPriority.medium,
       BalanceDisplayMode initialBalanceDisplayMode =
           BalanceDisplayMode.availableBalance}) async {
+    final isBitcoinBuyEnabled = (secrets.wyreSecretKey?.isNotEmpty ?? false) &&
+        (secrets.wyreApiKey?.isNotEmpty ?? false) &&
+        (secrets.wyreAccountId?.isNotEmpty ?? false);
+
+    final locale = await Devicelocale.currentLocale;
+    final deviceCountryCode = locale.split('_').last;
+    final isMoonPayEnabled = await MoonPayBuyProvider.onEnabled(deviceCountryCode);
+
     final settings = await SettingsStoreBase.load(
         nodeSource: nodeSource,
+        isBitcoinBuyEnabled: isBitcoinBuyEnabled,
+        isMoonPayEnabled: isMoonPayEnabled,
         initialBalanceDisplayMode: initialBalanceDisplayMode,
         initialFiatCurrency: initialFiatCurrency,
         initialMoneroTransactionPriority: initialMoneroTransactionPriority,

lib/view_model/buy/buy_view_model.dart

@@ -4,6 +4,7 @@ import 'package:cake_wallet/buy/wyre/wyre_buy_provider.dart';
 import 'package:cake_wallet/entities/crypto_currency.dart';
 import 'package:cake_wallet/entities/fiat_currency.dart';
 import 'package:cake_wallet/entities/wallet_type.dart';
+import 'package:cake_wallet/store/settings_store.dart';
 import 'package:cake_wallet/view_model/buy/buy_item.dart';
 import 'package:flutter/foundation.dart';
 import 'package:hive/hive.dart';
@@ -18,12 +19,14 @@ part 'buy_view_model.g.dart';
 class BuyViewModel = BuyViewModelBase with _$BuyViewModel;
 
 abstract class BuyViewModelBase with Store {
-  BuyViewModelBase(this.ordersSource, this.ordersStore, this.buyAmountViewModel,
+  BuyViewModelBase(this.ordersSource, this.ordersStore, this.settingsStore,
-      {@required this.wallet}) {
+      this.buyAmountViewModel, {@required this.wallet}) {
-    providerList = [
+    providerList = [WyreBuyProvider(wallet: wallet)];
-      WyreBuyProvider(wallet: wallet),
+
-      MoonPayBuyProvider(wallet: wallet)
+    if (settingsStore.isMoonPayEnabled ?? false) {
-    ];
+      providerList.add(MoonPayBuyProvider(wallet: wallet));
+    }
+
     items = providerList.map((provider) =>
         BuyItem(provider: provider, buyAmountViewModel: buyAmountViewModel))
         .toList();
@@ -34,6 +37,7 @@ abstract class BuyViewModelBase with Store {
 
   final Box<Order> ordersSource;
   final OrdersStore ordersStore;
+  final SettingsStore settingsStore;
   final BuyAmountViewModel buyAmountViewModel;
   final WalletBase wallet;