CAKE-284 | added static function defineUrlForCalculatingAmount() to changenow_exchange_provider.dart; fixed FAQ in the support_view_model.dart

lib/exchange/changenow/changenow_exchange_provider.dart

@@ -158,7 +158,6 @@ class ChangeNowExchangeProvider extends ExchangeProvider {
         ? DateTime.parse(expiredAtRaw).toLocal()
         : null;
 
-    if (expiredAt != null) {
     return Trade(
         id: id,
         from: from,
@@ -170,18 +169,6 @@ class ChangeNowExchangeProvider extends ExchangeProvider {
         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
@@ -215,7 +202,21 @@ class ChangeNowExchangeProvider extends ExchangeProvider {
 
       return estimatedAmount;
     } else {
-      final url = isFixedRateMode
+      final url = defineUrlForCalculatingAmount(from, to, amount, isFixedRateMode);
+      final response = await get(url);
+      final responseJSON = json.decode(response.body) as Map<String, dynamic>;
+      final estimatedAmount = responseJSON['estimatedAmount'] as double;
+
+      return estimatedAmount;
+    }
+  }
+
+  static String defineUrlForCalculatingAmount(
+      CryptoCurrency from,
+      CryptoCurrency to,
+      double amount,
+      bool isFixedRateMode) {
+    return isFixedRateMode
         ? apiUri +
         _exchangeAmountUriSufix +
         _fixedRateUriSufix +
@@ -232,11 +233,5 @@ class ChangeNowExchangeProvider extends ExchangeProvider {
         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;
-    }
   }
 }

lib/view_model/settings/settings_view_model.dart

@@ -20,7 +20,6 @@ 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/view_model/settings/version_list_item.dart';
-import 'package:cake_wallet/view_model/settings/link_list_item.dart';
 import 'package:cake_wallet/view_model/settings/picker_list_item.dart';
 import 'package:cake_wallet/view_model/settings/regular_list_item.dart';
 import 'package:cake_wallet/view_model/settings/settings_list_item.dart';

lib/view_model/support_view_model.dart

@@ -6,6 +6,7 @@ import 'package:cake_wallet/view_model/settings/settings_list_item.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 import 'package:mobx/mobx.dart';
+import 'package:url_launcher/url_launcher.dart';
 
 part 'support_view_model.g.dart';
 
@@ -16,8 +17,9 @@ abstract class SupportViewModelBase with Store {
     items = [
       RegularListItem(
         title: S.current.faq,
-        handler: (BuildContext context) =>
+        handler: (BuildContext context) async {
-            Navigator.pushNamed(context, Routes.faq),
+          if (await canLaunch(url)) await launch(url);
+        },
       ),
       LinkListItem(
           title: 'Email',
@@ -40,5 +42,7 @@ abstract class SupportViewModelBase with Store {
           link: 'mailto:support@changenow.io')
     ];
   }
+  static const url = 'https://cakewallet.com/guide/';
+
   List<SettingsListItem> items;
 }