All done. Need fix logout.

lib/screens/purchase.dart

@@ -46,11 +46,7 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
 
   @override
   void initState() {
-
-    setState(() {
-      requestAsyncData(user);
-    });
-
+    requestAsyncData(user);
     super.initState();
   }
 
@@ -66,7 +62,6 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
   String loyalty = '';
   String bonus = '';
   List<Map> coupons = [];
-  bool dataRequested = false;
 
   @override
   Widget getScreenContent() {
@@ -88,8 +83,8 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
     widgetList.add(getHintLabel());
     widgetList.add(getInputField()); // Нельзя добавить еще одно поле таким же способом
 
-    if (app != 'autobonus') { 
-      
+    if (app != 'autobonus') {
+
       if (this.loyalityType == 'bonus') {
         widgetList.add(getBonusInputField());
       }
@@ -121,7 +116,7 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
             Resources.getPrimaryColor(app)
         )
     ));
-    
+
     return new Column(children: <Widget>[
       new Expanded(
           child: new ListView(children: widgetList))
@@ -190,7 +185,7 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
         height: buttonHeight,
         child: new FlatButton(
             child: new Text(title, style: new TextStyle(color: textColor)),
-            onPressed: () => Navigator.of(context).pop(true)),
+            onPressed: () => Navigator.of(context).pop()),
         decoration: new BoxDecoration(
             border: new Border.all(
                 color: Resources.getButtonColor(app), width: 1.0),
@@ -230,9 +225,11 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
   }
 
   requestAsyncData(Map user) async {
+    setState(() {
+      loading = true;
+    });
     bool showBonus = await platform.invokeMethod('showBonus');
-    if (await platform.invokeMethod('isOnline') && !this.dataRequested) {
-      this.dataRequested = true;
+    if (await platform.invokeMethod('isOnline')) {
       var response, couponResponse;
       print(user['coupons_url']);
       try {
@@ -407,7 +404,7 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
 
           new Future.delayed(const Duration(milliseconds: 200), () {
             print('show purchase success!');
-            var route = new MaterialPageRoute<bool>(builder: (BuildContext context) => new PurchaseSuccessScreen(
+            var route = new MaterialPageRoute<Null>(builder: (BuildContext context) => new PurchaseSuccessScreen(
               sumTotal,
               user['first_name'] == null ? '' : user['first_name'],
               helper,
@@ -415,8 +412,8 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
               purchase,
               coupons['results']
             ), fullscreenDialog: true);
-              Navigator.of(context).push(route).then((b) {
-              print('finish registration closed: $b');
+            Navigator.of(context).push(route).then((_) {
+              Navigator.of(context).pop();
             });
           });
         }