new project stable version

lib/domain/entities/top_up_tariff.dart

@@ -0,0 +1,17 @@
+class TopUpTariff {
+  final int id;
+  final int points;
+  final double price;
+  final double? discountPercent;
+
+  TopUpTariff({
+    required this.id,
+    required this.points,
+    required this.price,
+    this.discountPercent,
+  });
+
+  double get finalPrice => discountPercent != null
+      ? price * (1 - discountPercent! / 100)
+      : price;
+}