CAKE-360 | added shouldShowYatPopup parameter to settings_store.dart and applied this parameter to dashboard_view_model.dart and dashboard_page.dart; added scrollbar to choose_yat_address_alert.dart; changed yat logo; fixed fetchYatAddress() method in the yat_store.dart; created class YatLink

lib/entities/preferences_key.dart

@@ -20,4 +20,5 @@ class PreferencesKey {
   static const moneroTransactionPriority = 'current_fee_priority_monero';
   static const bitcoinTransactionPriority = 'current_fee_priority_bitcoin';
   static const shouldShowReceiveWarning = 'should_show_receive_warning';
+  static const shouldShowYatPopup = 'should_show_yat_popup';
 }

lib/src/screens/dashboard/dashboard_page.dart

@@ -156,6 +156,7 @@ class DashboardPage extends BasePage {
     pages.add(BalancePage(dashboardViewModel: walletViewModel));
     pages.add(TransactionsPage(dashboardViewModel: walletViewModel));
 
+    if (walletViewModel.shouldShowYatPopup) {
       await Future<void>.delayed(Duration(seconds: 1));
       await showPopUp<void>(
           context: context,
@@ -164,6 +165,8 @@ class DashboardPage extends BasePage {
                 dashboardViewModel: walletViewModel,
                 onClose: () => Navigator.of(context).pop());
           });
+      walletViewModel.furtherShowYatPopup(false);
+    }
 
     autorun((_) async {
       if (!walletViewModel.isOutdatedElectrumWallet) {

lib/src/screens/send/widgets/choose_yat_address_alert.dart

@@ -1,3 +1,4 @@
+import 'package:cake_wallet/src/widgets/cake_scrollbar.dart';
 import 'package:flutter/material.dart';
 import 'package:cake_wallet/src/widgets/base_alert_dialog.dart';
 
@@ -22,14 +23,53 @@ class ChooseYatAddressAlert extends BaseAlertDialog {
   bool get barrierDismissible => false;
 
   @override
-  Widget actionButtons(BuildContext context) {
+  Widget actionButtons(BuildContext context) =>
-    return Container(
+      ChooseYatAddressButtons(addresses);
+}
+
+class ChooseYatAddressButtons extends StatefulWidget {
+  ChooseYatAddressButtons(this.addresses);
+
+  final List<String> addresses;
+
+  @override
+  ChooseYatAddressButtonsState createState() =>
+      ChooseYatAddressButtonsState(addresses);
+}
+
+class ChooseYatAddressButtonsState extends State<ChooseYatAddressButtons> {
+  ChooseYatAddressButtonsState(this.addresses)
+      : itemCount = addresses?.length ?? 0;
+
+  final List<String> addresses;
+  final int itemCount;
+  final double backgroundHeight = 118;
+  final double thumbHeight = 72;
+  ScrollController controller = ScrollController();
+  double fromTop = 0;
+
+  @override
+  Widget build(BuildContext context) {
+    controller.addListener(() {
+      fromTop = controller.hasClients
+          ? (controller.offset / controller.position.maxScrollExtent *
+          (backgroundHeight - thumbHeight))
+          : 0;
+      setState(() {});
+    });
+
+    return Stack(
+      alignment: Alignment.center,
+      clipBehavior: Clip.none,
+      children: [
+        Container(
             width: 300,
-      height: 105,
+            height: 158,
             color: Theme.of(context).accentTextTheme.body1.backgroundColor,
             child: ListView.separated(
+                controller: controller,
                 padding: EdgeInsets.all(0),
-          itemCount: addresses.length,
+                itemCount: itemCount,
                 separatorBuilder: (_, __) => Container(
                   height: 1,
                   color: Theme.of(context).dividerColor,
@@ -67,6 +107,14 @@ class ChooseYatAddressAlert extends BaseAlertDialog {
                     ),
                   );
                 })
+        ),
+        if (itemCount > 3) CakeScrollbar(
+            backgroundHeight: backgroundHeight,
+            thumbHeight: thumbHeight,
+            fromTop: fromTop,
+            //rightOffset: -15
+        )
+      ]
     );
   }
 }

lib/src/screens/yat/widgets/yat_bar.dart

@@ -5,7 +5,7 @@ class YatBar extends StatelessWidget {
   YatBar({this.onClose});
 
   final VoidCallback onClose;
-  final image = Image.asset('assets/images/yat_logo.png');
+  final image = Image.asset('assets/images/yat_logo.png', width: 81, height: 28);
 
   @override
   Widget build(BuildContext context) {

lib/src/screens/yat/yat_alert.dart

@@ -11,7 +11,9 @@ import 'package:lottie/lottie.dart';
 
 class YatAlert extends StatelessWidget {
   YatAlert(this.yatStore)
-      : baseUrl = isYatDevMode ? baseDevUrl : baseReleaseUrl;
+      : baseUrl = YatLink.isDevMode
+          ? YatLink.baseDevUrl
+          : YatLink.baseReleaseUrl;
 
   final YatStore yatStore;
   final String baseUrl;
@@ -86,7 +88,7 @@ class YatAlert extends StatelessWidget {
                         .arrow_up_right_square,
                     mainAxisAlignment: MainAxisAlignment.end,
                     onPressed: () {
-                      final url = baseUrl + createSuffix;
+                      final url = baseUrl + YatLink.createSuffix;
                       launch(url);
                     }),
                 Padding(
@@ -102,11 +104,11 @@ class YatAlert extends StatelessWidget {
                           .arrow_up_right_square,
                       mainAxisAlignment: MainAxisAlignment.end,
                       onPressed: () {
-                        String url = baseUrl + signInSuffix;
+                        String url = baseUrl + YatLink.signInSuffix;
                         final parameters =
                             yatStore.defineQueryParameters();
                         if (parameters.isNotEmpty) {
-                          url += queryParameter + parameters;
+                          url += YatLink.queryParameter + parameters;
                         }
                         launch(url);
                       })

lib/src/screens/yat/yat_popup.dart

@@ -14,7 +14,9 @@ import 'package:url_launcher/url_launcher.dart';
 
 class YatPopup extends StatelessWidget {
   YatPopup({this.dashboardViewModel, this.onClose})
-      : baseUrl = isYatDevMode ? baseDevUrl : baseReleaseUrl;
+      : baseUrl = YatLink.isDevMode
+          ? YatLink.baseDevUrl
+          : YatLink.baseReleaseUrl;
 
   static const durationInMilliseconds = 250;
 
@@ -157,15 +159,15 @@ class YatPopup extends StatelessWidget {
             child: ThirdIntroduction(
                 onClose: onClose,
                 onGet: () {
-                  final url = baseUrl + createSuffix;
+                  final url = baseUrl + YatLink.createSuffix;
                   launch(url);
                 },
                 onConnect: () {
-                  String url = baseUrl + signInSuffix;
+                  String url = baseUrl + YatLink.signInSuffix;
                   final parameters = dashboardViewModel
                       .yatStore.defineQueryParameters();
                   if (parameters.isNotEmpty) {
-                    url += queryParameter + parameters;
+                    url += YatLink.queryParameter + parameters;
                   }
                   launch(url);
                 }

lib/store/settings_store.dart

@@ -38,6 +38,7 @@ abstract class SettingsStoreBase with Store {
       @required Map<WalletType, Node> nodes,
       @required TransactionPriority initialBitcoinTransactionPriority,
       @required TransactionPriority initialMoneroTransactionPriority,
+      @required this.shouldShowYatPopup,
       @required this.isBitcoinBuyEnabled,
       this.actionlistDisplayMode}) {
     fiatCurrency = initialFiatCurrency;
@@ -59,6 +60,11 @@ abstract class SettingsStoreBase with Store {
         (FiatCurrency fiatCurrency) => sharedPreferences.setString(
             PreferencesKey.currentFiatCurrencyKey, fiatCurrency.serialize()));
 
+    reaction(
+        (_) => shouldShowYatPopup,
+        (bool shouldShowYatPopup) => sharedPreferences
+             .setBool(PreferencesKey.shouldShowYatPopup, shouldShowYatPopup));
+
     priority.observe((change) {
       final key = change.key == WalletType.monero
           ? PreferencesKey.moneroTransactionPriority
@@ -110,6 +116,9 @@ abstract class SettingsStoreBase with Store {
   @observable
   FiatCurrency fiatCurrency;
 
+  @observable
+  bool shouldShowYatPopup;
+
   @observable
   ObservableList<ActionListDisplayMode> actionlistDisplayMode;
 
@@ -217,6 +226,8 @@ abstract class SettingsStoreBase with Store {
     final bitcoinElectrumServer = nodeSource.get(bitcoinElectrumServerId);
     final litecoinElectrumServer = nodeSource.get(litecoinElectrumServerId);
     final packageInfo = await PackageInfo.fromPlatform();
+    final shouldShowYatPopup =
+        sharedPreferences.getBool(PreferencesKey.shouldShowYatPopup) ?? true;
 
     return SettingsStore(
         sharedPreferences: sharedPreferences,
@@ -236,7 +247,8 @@ abstract class SettingsStoreBase with Store {
         initialPinLength: pinLength,
         initialLanguageCode: savedLanguageCode,
         initialMoneroTransactionPriority: moneroTransactionPriority,
-        initialBitcoinTransactionPriority: bitcoinTransactionPriority);
+        initialBitcoinTransactionPriority: bitcoinTransactionPriority,
+        shouldShowYatPopup: shouldShowYatPopup);
   }
 
   Future<void> reload(
@@ -270,6 +282,7 @@ abstract class SettingsStoreBase with Store {
     pinCodeLength = settings.pinCodeLength;
     languageCode = settings.languageCode;
     appVersion = settings.appVersion;
+    shouldShowYatPopup = settings.shouldShowYatPopup;
   }
 
   Future<void> _saveCurrentNode(Node node, WalletType walletType) async {

lib/store/yat/yat_store.dart

@@ -15,18 +15,24 @@ import 'package:http/http.dart';
 
 part 'yat_store.g.dart';
 
-const baseDevUrl = 'https://yat.fyi';
+class YatLink {
-const baseReleaseUrl = 'https://y.at';
+  static const baseDevUrl = 'https://yat.fyi';
-const signInSuffix = '/partner/CW/link-email';
+  static const baseReleaseUrl = 'https://y.at';
-const createSuffix = '/create';
+  static const signInSuffix = '/partner/CW/link-email';
-const queryParameter = '?addresses=';
+  static const createSuffix = '/create';
-const requestDevUrl = 'https://a.yat.fyi/emoji_id/';
+  static const queryParameter = '?addresses=';
-const requestReleaseUrl = 'https://a.y.at/emoji_id/';
+  static const requestDevUrl = 'https://a.yat.fyi/emoji_id/';
-const isYatDevMode = true;
+  static const requestReleaseUrl = 'https://a.y.at/emoji_id/';
+  static const isDevMode = true;
+  static const tags = <String, List<String>>{"XMR" : ['0x1001', '0x1002'],
+    "BTC" : ['0x1003'], "LTC" : ['0x3fff']};
+}
 
 Future<List<String>> fetchYatAddress(String emojiId, String ticker) async {
-  final requestURL = isYatDevMode ? requestDevUrl : requestReleaseUrl;
+  final requestURL = YatLink.isDevMode
-  final url = requestURL + emojiId + '/' + ticker.toUpperCase();
+      ? YatLink.requestDevUrl
+      : YatLink.requestReleaseUrl;
+  final url = requestURL + emojiId;
   final response = await get(url);
 
   if (response.statusCode != 200) {
@@ -41,13 +47,20 @@ Future<List<String>> fetchYatAddress(String emojiId, String ticker) async {
   }
 
   final List<String> addresses = [];
+  final currency = ticker.toUpperCase();
 
   for (var elem in result) {
+    final tag = elem['tag'] as String;
+    if (tag?.isEmpty ?? true) {
+      continue;
+    }
+    if (YatLink.tags[currency]?.contains(tag) ?? false) {
       final yatAddress = elem['data'] as String;
       if (yatAddress?.isNotEmpty ?? false) {
         addresses.add(yatAddress);
       }
     }
+  }
 
   return addresses;
 }
@@ -123,8 +136,8 @@ abstract class YatStoreBase with Store {
             }
 
             parameters += subaddress.address.startsWith('4')
-                ? '0x1001%3D'
+                ? YatLink.tags["XMR"].first + '%3D'
-                : '0x1002%3D';
+                : YatLink.tags["XMR"].last + '%3D';
 
             parameters += subaddress.address;
           });
@@ -141,7 +154,7 @@ abstract class YatStoreBase with Store {
             isFirstAddress = !isFirstAddress;
           }
 
-          parameters += '0x1003%3D' + record.address;
+          parameters += YatLink.tags["BTC"].first + '%3D' + record.address;
         });
         break;
       case WalletType.litecoin:
@@ -155,7 +168,7 @@ abstract class YatStoreBase with Store {
             isFirstAddress = !isFirstAddress;
           }
 
-          parameters += '0x3fff%3D' + record.address;
+          parameters += YatLink.tags["LTC"].first + '%3D' + record.address;
         });
         break;
       default:

lib/view_model/dashboard/dashboard_view_model.dart

@@ -236,6 +236,12 @@ abstract class DashboardViewModelBase with Store {
 
   bool get isBuyEnabled => settingsStore.isBitcoinBuyEnabled;
 
+  bool get shouldShowYatPopup => settingsStore.shouldShowYatPopup;
+
+  @action
+  void furtherShowYatPopup(bool shouldShow) =>
+      settingsStore.shouldShowYatPopup = shouldShow;
+
   ReactionDisposer _onMoneroAccountChangeReaction;
 
   ReactionDisposer _onMoneroBalanceChangeReaction;