quotation rate display

frontend/pshared/lib/models/asset.dart

@@ -0,0 +1,18 @@
+import 'package:pshared/models/currency.dart';
+import 'package:pshared/utils/currency.dart';
+
+
+class Asset {
+  final Currency currency;
+  final double amount;
+
+  const Asset({
+    required this.currency,
+    required this.amount,
+  });
+}
+
+Asset createAsset(String currencyCode, String amount) => Asset(
+  currency: currencyStringToCode(currencyCode),
+  amount: double.parse(amount),
+);

frontend/pshared/lib/models/currency.dart

@@ -0,0 +1 @@
+enum Currency {usd, eur, rub, usdt, usdc}