Multiple Wallet support, history of each wallet and updated payment page

frontend/pweb/lib/models/wallet_transaction.dart

@@ -0,0 +1,74 @@
+import 'package:flutter/widgets.dart';
+import 'package:pshared/models/payment/status.dart';
+
+import 'package:pweb/models/currency.dart';
+
+
+enum WalletTransactionType { topUp, payout }
+
+extension WalletTransactionTypeX on WalletTransactionType {
+  String label(BuildContext context) {
+    switch (this) {
+      case WalletTransactionType.topUp:
+        return 'Top up';
+      case WalletTransactionType.payout:
+        return 'Payout';
+    }
+  }
+
+  String get sign => this == WalletTransactionType.topUp ? '+' : '-';
+}
+
+class WalletTransaction {
+  final String id;
+  final String walletId;
+  final WalletTransactionType type;
+  final OperationStatus status;
+  final double amount;
+  final Currency currency;
+  final DateTime date;
+  final String description;
+  final String? counterparty;
+  final double? balanceAfter;
+
+  const WalletTransaction({
+    required this.id,
+    required this.walletId,
+    required this.type,
+    required this.status,
+    required this.amount,
+    required this.currency,
+    required this.date,
+    required this.description,
+    this.counterparty,
+    this.balanceAfter,
+  });
+
+  bool get isTopUp => type == WalletTransactionType.topUp;
+
+  WalletTransaction copyWith({
+    String? id,
+    String? walletId,
+    WalletTransactionType? type,
+    OperationStatus? status,
+    double? amount,
+    Currency? currency,
+    DateTime? date,
+    String? description,
+    String? counterparty,
+    double? balanceAfter,
+  }) {
+    return WalletTransaction(
+      id: id ?? this.id,
+      walletId: walletId ?? this.walletId,
+      type: type ?? this.type,
+      status: status ?? this.status,
+      amount: amount ?? this.amount,
+      currency: currency ?? this.currency,
+      date: date ?? this.date,
+      description: description ?? this.description,
+      counterparty: counterparty ?? this.counterparty,
+      balanceAfter: balanceAfter ?? this.balanceAfter,
+    );
+  }
+}