+ quotation provider

frontend/pshared/lib/models/payment/asset.dart

@@ -0,0 +1,14 @@
+import 'package:pshared/models/payment/chain_network.dart';
+
+
+class PaymentAsset {
+  final ChainNetwork chain;
+  final String tokenSymbol;
+  final String? contractAddress;
+
+  const PaymentAsset({
+    this.chain = ChainNetwork.unspecified,
+    required this.tokenSymbol,
+    this.contractAddress,
+  });
+}