modify package list

lib/vo/invoice.dart

@@ -11,6 +11,9 @@ class Invoice {
   String paymentAttachment;
 
   List<Package> packages;
+  List<Receipt> receipts;
+  List<String> receiptPhotos;
+
   Invoice(
       {this.invoiceNumber,
       this.invoiceDate,
@@ -20,7 +23,16 @@ class Invoice {
       this.discount,
       this.status,
       this.paymentAttachment,
-      this.packages});
+      this.packages,
+      this.receiptPhotos,
+      this.receipts});
 
   double get getAmount => packages.fold(0, (p, e) => (e.rate * e.weight) + p);
 }
+
+class Receipt {
+  int amount;
+  DateTime date;
+
+  Receipt({this.amount, this.date});
+}