Simply #2

lib/reader/reader_flutter.dart

@@ -24,7 +24,10 @@ class StartService {
       String prevBalance,
       String cardNumber,
       String getRegDb,
-      String amount) async {
+      String amount,
+      String outletId,
+      String persoReff
+      ) async {
     var result;
     try {
       result = await platform.invokeMethod("topup_inquiry", <String, dynamic>{
@@ -33,6 +36,8 @@ class StartService {
         'card_number': cardNumber,
         'get_reg_db': getRegDb,
         'amount': amount,
+        'outlet_id': outletId,
+        "perso_reff": persoReff
       });
     } catch (error) {
       result = error.toString();