quotation rate display

frontend/pshared/lib/provider/payment/amount.dart

@@ -0,0 +1,20 @@
+import 'package:flutter/material.dart';
+
+
+class PaymentAmountProvider with ChangeNotifier {
+  double _amount = 10.0;
+  bool _payerCoversFee = true;
+
+  double get amount => _amount;
+  bool get payerCoversFee => _payerCoversFee;
+
+  void setAmount(double value) {
+    _amount = value;
+    notifyListeners();
+  }
+
+  void setPayerCoversFee(bool value) {
+    _payerCoversFee = value;
+    notifyListeners();
+  }
+}