Сделал экраны Проведения покупки

lib/main.dart

@@ -31,6 +31,7 @@ const Color textBorderColor = const Color(0xffcfd8dc);
 const Color textFieldBackground = const Color(0xffefefef);
 const Color tokenActiveTextColor = const Color(0xff1f5a1f);
 const Color tokenActivateTextColor = const Color(0xff4e3a19);
+const Color greenBackground = const Color(0xff8ae28a);
 
 // Margins
 const double verticalMargin = 28.0;
@@ -70,7 +71,8 @@ startScanner(BuildContext context) async {
     return result;
 
   });
-
+  
+  Navigator.of(context).pop();
   await platform.invokeMethod('startScanner');
 }