Начал экран успешного проведения покупки

lib/purchase_success.dart

@@ -0,0 +1,38 @@
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+
+import 'main.dart';
+import 'base_state.dart';
+import 'purchase.dart';
+
+/// Экран проведения покупки.
+class PurchaseSuccessScreen extends StatefulWidget {
+  @override State createState() => new _PurchaseSuccessScreenState();
+}
+
+class _PurchaseSuccessScreenState<T> extends PurchaseScreenState<T> {
+
+  @override String getTitle() {
+    return "Проведение покупки";
+  }
+
+  @overide getMenuButtons(BuildContext context) {
+    return <Widget>[
+      new IconButton(icon: new Icon(Icons.help_outline), onPressed: () {}), 
+      new IconButton(icon: new Image.asset(logout_png, height: 20.0, width: 20.0), onPressed: () => logout(context))
+    ];
+  }
+
+  @override Widget getScreenContent() {
+    return new Column(children: <Widget>[
+            getValueWithTitle('Покупатель', 'Знаменитый Рокер Паук'),
+            _getSuccessMessage(),
+            getApprovePurchaseButton(context)
+        ]);
+  }
+
+  _getSuccessMessage() {
+  	return new Container(height: 64.0, decoration: new BoxDecoration(color: const Color(0x8ae28aff)), child: new Text('Покупка на сумму 1234.00 руб. проведена', style: new TextStyle(color: tokenActiveTextColor)));
+  }
+
+}