From dbfbadffdaef761abad0b493b27714c51fb22b01 Mon Sep 17 00:00:00 2001
From: Godwin Asuquo <godilite@gmail.com>
Date: Wed, 1 Mar 2023 15:50:31 +0200
Subject: [PATCH] Filter to use Tor only exchange

---
 lib/src/widgets/check_box_picker.dart         | 16 ++++++++--------
 .../exchange/exchange_view_model.dart         | 19 ++++++++++++++++++-
 2 files changed, 26 insertions(+), 9 deletions(-)

diff --git a/lib/src/widgets/check_box_picker.dart b/lib/src/widgets/check_box_picker.dart
index e2f817fc4..80461e26d 100644
--- a/lib/src/widgets/check_box_picker.dart
+++ b/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,
                 ),
               ),
diff --git a/lib/view_model/exchange/exchange_view_model.dart b/lib/view_model/exchange/exchange_view_model.dart
index f9f5683d9..7921115c6 100644
--- a/lib/view_model/exchange/exchange_view_model.dart
+++ b/lib/view_model/exchange/exchange_view_model.dart
@@ -2,6 +2,7 @@ import 'dart:async';
 import 'dart:collection';
 import 'dart:convert';
 
+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';
@@ -62,8 +63,9 @@ abstract class ExchangeViewModelBase with Store {
       limitsState = LimitsInitialState(),
       receiveCurrency = wallet.currency,
       depositCurrency = wallet.currency,
-      providerList = [ChangeNowExchangeProvider(), SideShiftExchangeProvider(), SimpleSwapExchangeProvider(), TrocadorExchangeProvider()],
+      providerList = [],
       selectedProviders = ObservableList<ExchangeProvider>() {
+    _setProviders();
     const excludeDepositCurrencies = [CryptoCurrency.btt, CryptoCurrency.nano];
     const excludeReceiveCurrencies = [CryptoCurrency.xlm, CryptoCurrency.xrp,
       CryptoCurrency.bnb, CryptoCurrency.btt, CryptoCurrency.nano];
@@ -126,6 +128,13 @@ abstract class ExchangeViewModelBase with Store {
   final TradesStore tradesStore;
   final SharedPreferences sharedPreferences;
 
+  final _allProviders = [
+        ChangeNowExchangeProvider(),
+        SideShiftExchangeProvider(),
+        SimpleSwapExchangeProvider(),
+        TrocadorExchangeProvider(),
+      ];
+
   @observable
   ExchangeProvider? provider;
 
@@ -683,4 +692,12 @@ abstract class ExchangeViewModelBase with Store {
         break;
     }
   }
+
+  void _setProviders(){
+    if (_settingsStore.exchangeStatus == FiatApiMode.torOnly) {
+      providerList = _allProviders.where((provider) => provider.shouldUseOnionAddress).toList();
+    } else {
+      providerList = _allProviders;
+    }
+  }
 }