Frontend first draft

frontend/pweb/lib/services/wallets.dart

@@ -0,0 +1,41 @@
+import 'package:pweb/models/currency.dart';
+import 'package:pweb/models/wallet.dart';
+
+
+abstract class WalletsService {
+  Future<List<Wallet>> getWallets();
+  Future<List<Wallet>> updateWallet();
+  Future<List<Wallet>> createWallet();
+  Future<List<Wallet>> deleteWallet();
+
+  Future<Wallet> getWallet(String walletRef);
+}
+
+class MockWalletsService implements WalletsService {
+  final List<Wallet> _wallets = [
+    Wallet(id: '1124', walletUserID: 'WA-12345667', name: 'Main Wallet', balance: 10000000.0, currency: Currency.rub),
+    Wallet(id: '2124', walletUserID: 'WA-76654321', name: 'Savings', balance: 2500.5, currency: Currency.usd),
+  ];
+
+  @override
+  Future<List<Wallet>> getWallets() async {
+    return _wallets;
+  }
+
+  @override
+  Future<Wallet> getWallet(String walletId) async {
+    return _wallets.firstWhere(
+      (wallet) => wallet.id == walletId,
+      orElse: () => throw Exception('Wallet not found'),
+    );
+  }
+
+  @override
+  Future<List<Wallet>> updateWallet() async => [];
+
+  @override
+  Future<List<Wallet>> createWallet() async => [];
+
+  @override
+  Future<List<Wallet>> deleteWallet() async => [];
+}