Исправления на экране сканера

lib/purchase.dart

@@ -4,24 +4,27 @@ import 'dart:convert';
 import 'dart:async';
 
 import 'main.dart';
+import 'common.dart';
+import 'consts.dart';
+import 'network.dart';
 import 'base_state.dart';
 import 'purchase_success.dart';
 
 /// Экран проведения покупки.
 class PurchaseScreen extends StatefulWidget {
 
-  PurchaseScreen(this.response, this.card);
+  PurchaseScreen(this.user, this.card);
 
-  Map response;
+  String user;
   String card;
 
-  @override State createState() => new PurchaseScreenState<PurchaseScreen>(response, card);
+  @override State createState() => new PurchaseScreenState<PurchaseScreen>(user, card);
 }
 
 class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
 
-  PurchaseScreenState(Map user, String card) {
-    this.user = user;
+  PurchaseScreenState(String userString, String card) {
+    this.user = JSON.decode(userString);
     this.card = card;
     getLoyality(user['loyalty_url']);
   }