WIP: integration with ledger

frontend/pshared/lib/controllers/payment/source.dart

@@ -0,0 +1,67 @@
+import 'package:flutter/foundation.dart';
+
+import 'package:collection/collection.dart';
+
+import 'package:pshared/models/payment/source.dart';
+import 'package:pshared/provider/payment/source.dart';
+
+
+class PaymentSourceController extends ChangeNotifier {
+  PaymentSourceProvider? _provider;
+  String? _selectedSourceKey;
+
+  List<PaymentSource> get sources => _provider?.sources ?? const [];
+
+  PaymentSource? get selectedSource {
+    final key = _selectedSourceKey;
+    if (key == null) return null;
+    return sources.firstWhereOrNull((source) => source.key == key);
+  }
+
+  void update(PaymentSourceProvider provider) {
+    _provider = provider;
+    final nextSources = provider.sources;
+    final nextSelectedKey = _resolveSelectedKey(
+      currentKey: _selectedSourceKey,
+      sources: nextSources,
+    );
+
+    if (nextSelectedKey == _selectedSourceKey) return;
+    _selectedSourceKey = nextSelectedKey;
+    notifyListeners();
+  }
+
+  void selectSource(PaymentSource source) {
+    if (_selectedSourceKey == source.key) return;
+    _selectedSourceKey = source.key;
+    notifyListeners();
+  }
+
+  void selectWalletByRef(String walletRef) {
+    final source = sources.firstWhereOrNull(
+      (s) => s.type == PaymentSourceType.wallet && s.id == walletRef,
+    );
+    if (source == null) return;
+    selectSource(source);
+  }
+
+  void selectLedgerByRef(String ledgerAccountRef) {
+    final source = sources.firstWhereOrNull(
+      (s) => s.type == PaymentSourceType.ledger && s.id == ledgerAccountRef,
+    );
+    if (source == null) return;
+    selectSource(source);
+  }
+
+  String? _resolveSelectedKey({
+    required String? currentKey,
+    required List<PaymentSource> sources,
+  }) {
+    if (sources.isEmpty) return null;
+    if (currentKey != null &&
+        sources.any((source) => source.key == currentKey)) {
+      return currentKey;
+    }
+    return sources.first.key;
+  }
+}

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

@@ -0,0 +1,31 @@
+import 'package:pshared/models/ledger/account.dart';
+import 'package:pshared/models/payment/wallet.dart';
+
+
+enum PaymentSourceType { wallet, ledger }
+
+class PaymentSource {
+  final PaymentSourceType type;
+  final Wallet? wallet;
+  final LedgerAccount? ledgerAccount;
+
+  const PaymentSource._({required this.type, this.wallet, this.ledgerAccount});
+
+  const PaymentSource.wallet(Wallet wallet)
+    : this._(type: PaymentSourceType.wallet, wallet: wallet);
+
+  const PaymentSource.ledger(LedgerAccount account)
+    : this._(type: PaymentSourceType.ledger, ledgerAccount: account);
+
+  String get id => switch (type) {
+    PaymentSourceType.wallet => wallet!.id,
+    PaymentSourceType.ledger => ledgerAccount!.ledgerAccountRef,
+  };
+
+  String get key => '${type.name}:$id';
+
+  String get name => switch (type) {
+    PaymentSourceType.wallet => wallet!.name,
+    PaymentSourceType.ledger => ledgerAccount!.name,
+  };
+}

frontend/pshared/lib/provider/payment/quotation/intent_builder.dart

@@ -1,4 +1,3 @@
-import 'package:pshared/controllers/balance_mask/wallets.dart';
 import 'package:pshared/models/payment/asset.dart';
 import 'package:pshared/models/payment/chain_network.dart';
 import 'package:pshared/models/payment/currency_pair.dart';
@@ -9,66 +8,109 @@ import 'package:pshared/models/payment/kind.dart';
 import 'package:pshared/models/payment/methods/card.dart';
 import 'package:pshared/models/payment/methods/data.dart';
 import 'package:pshared/models/payment/methods/iban.dart';
+import 'package:pshared/models/payment/methods/ledger.dart';
 import 'package:pshared/models/payment/methods/managed_wallet.dart';
 import 'package:pshared/models/payment/methods/russian_bank.dart';
+import 'package:pshared/models/payment/source.dart';
 import 'package:pshared/models/payment/methods/type.dart';
 import 'package:pshared/models/money.dart';
 import 'package:pshared/models/payment/settlement_mode.dart';
 import 'package:pshared/models/payment/intent.dart';
 import 'package:pshared/models/recipient/recipient.dart';
+import 'package:pshared/controllers/payment/source.dart';
 import 'package:pshared/provider/payment/amount.dart';
 import 'package:pshared/provider/payment/flow.dart';
 import 'package:pshared/provider/recipient/provider.dart';
 import 'package:pshared/utils/currency.dart';
 
-
 class QuotationIntentBuilder {
   PaymentIntent? build({
     required PaymentAmountProvider payment,
-    required WalletsController wallets,
+    required PaymentSourceController sources,
     required PaymentFlowProvider flow,
     required RecipientsProvider recipients,
   }) {
-    final selectedWallet = wallets.selectedWallet;
+    final selectedSource = sources.selectedSource;
     final paymentData = flow.selectedPaymentData;
     final selectedMethod = flow.selectedMethod;
-    if (selectedWallet == null || paymentData == null) return null;
+    if (selectedSource == null || paymentData == null) return null;
 
     final customer = _buildCustomer(
       recipient: recipients.currentObject,
       method: selectedMethod,
       data: paymentData,
     );
+    final sourceCurrency = _resolveSourceCurrency(selectedSource);
+    if (sourceCurrency == null) return null;
+    final targetCurrency = _resolveTargetCurrency(paymentData);
+    final fxIntent = _buildFxIntent(
+      baseCurrency: sourceCurrency,
+      quoteCurrency: targetCurrency,
+    );
     final amount = Money(
       amount: payment.amount.toString(),
-      // TODO: adapt to possible other sources
-      currency: currencyCodeToString(selectedWallet.currency),
-    );
-    final fxIntent = FxIntent(
-      pair: CurrencyPair(
-        base: currencyCodeToString(selectedWallet.currency),
-        quote: 'RUB', // TODO: exentd target currencies
-      ),
-      side: FxSide.sellBaseBuyQuote,
+      currency: sourceCurrency,
     );
     return PaymentIntent(
       kind: PaymentKind.payout,
       amount: amount,
       destination: paymentData,
-      source: ManagedWalletPaymentMethod(
-        managedWalletRef: selectedWallet.id,
-        asset: PaymentAsset(
-          tokenSymbol: selectedWallet.tokenSymbol ?? '',
-          chain: selectedWallet.network ?? ChainNetwork.unspecified,
-        ) 
-      ),
+      source: _buildSourceEndpoint(selectedSource),
       fx: fxIntent,
-      settlementMode: payment.payerCoversFee ? SettlementMode.fixReceived : SettlementMode.fixSource,
-      settlementCurrency: _resolveSettlementCurrency(amount: amount, fx: fxIntent),
+      settlementMode: payment.payerCoversFee
+          ? SettlementMode.fixReceived
+          : SettlementMode.fixSource,
+      settlementCurrency: _resolveSettlementCurrency(
+        amount: amount,
+        fx: fxIntent,
+      ),
       customer: customer,
     );
   }
 
+  String _resolveTargetCurrency(PaymentMethodData destination) {
+    // Current payout flow is RUB-settlement oriented.
+    // Avoid requesting unsupported self-pairs (e.g. RUB/RUB).
+    return 'RUB';
+  }
+
+  FxIntent? _buildFxIntent({
+    required String baseCurrency,
+    required String quoteCurrency,
+  }) {
+    final base = baseCurrency.trim().toUpperCase();
+    final quote = quoteCurrency.trim().toUpperCase();
+    if (base.isEmpty || quote.isEmpty || base == quote) {
+      return null;
+    }
+    return FxIntent(
+      pair: CurrencyPair(base: base, quote: quote),
+      side: FxSide.sellBaseBuyQuote,
+    );
+  }
+
+  String? _resolveSourceCurrency(PaymentSource source) {
+    return switch (source.type) {
+      PaymentSourceType.wallet => currencyCodeToString(source.wallet!.currency),
+      PaymentSourceType.ledger => source.ledgerAccount?.currency,
+    };
+  }
+
+  PaymentMethodData _buildSourceEndpoint(PaymentSource source) {
+    return switch (source.type) {
+      PaymentSourceType.wallet => ManagedWalletPaymentMethod(
+        managedWalletRef: source.wallet!.id,
+        asset: PaymentAsset(
+          tokenSymbol: source.wallet?.tokenSymbol ?? '',
+          chain: source.wallet?.network ?? ChainNetwork.unspecified,
+        ),
+      ),
+      PaymentSourceType.ledger => LedgerPaymentMethod(
+        ledgerAccountRef: source.ledgerAccount!.ledgerAccountRef,
+      ),
+    };
+  }
+
   String _resolveSettlementCurrency({
     required Money amount,
     required FxIntent? fx,
@@ -85,8 +127,12 @@ class QuotationIntentBuilder {
         case FxSide.unspecified:
           break;
       }
-      if (amount.currency == pair.base && pair.quote.isNotEmpty) return pair.quote;
-      if (amount.currency == pair.quote && pair.base.isNotEmpty) return pair.base;
+      if (amount.currency == pair.base && pair.quote.isNotEmpty) {
+        return pair.quote;
+      }
+      if (amount.currency == pair.quote && pair.base.isNotEmpty) {
+        return pair.base;
+      }
       if (pair.quote.isNotEmpty) return pair.quote;
       if (pair.base.isNotEmpty) return pair.base;
     }
@@ -111,8 +157,9 @@ class QuotationIntentBuilder {
         : name.trim().split(RegExp(r'\s+'));
     final firstName = parts.isNotEmpty ? parts.first : null;
     final lastName = parts.length >= 2 ? parts.last : null;
-    final middleName =
-        parts.length > 2 ? parts.sublist(1, parts.length - 1).join(' ') : null;
+    final middleName = parts.length > 2
+        ? parts.sublist(1, parts.length - 1).join(' ')
+        : null;
 
     return Customer(
       id: id,
@@ -139,7 +186,9 @@ class QuotationIntentBuilder {
       return iban.accountHolder.trim();
     }
 
-    final bank = method?.bankAccountData ?? (data is RussianBankAccountPaymentMethod ? data : null);
+    final bank =
+        method?.bankAccountData ??
+        (data is RussianBankAccountPaymentMethod ? data : null);
     if (bank != null && bank.recipientName.trim().isNotEmpty) {
       return bank.recipientName.trim();
     }

frontend/pshared/lib/provider/payment/quotation/quotation.dart

@@ -7,7 +7,7 @@ import 'package:logging/logging.dart';
 import 'package:uuid/uuid.dart';
 
 import 'package:pshared/api/requests/payment/quote.dart';
-import 'package:pshared/controllers/balance_mask/wallets.dart';
+import 'package:pshared/controllers/payment/source.dart';
 import 'package:pshared/data/mapper/payment/intent/payment.dart';
 import 'package:pshared/models/asset.dart';
 import 'package:pshared/models/payment/intent.dart';
@@ -23,19 +23,22 @@ import 'package:pshared/provider/payment/quotation/intent_builder.dart';
 import 'package:pshared/service/payment/quotation.dart';
 import 'package:pshared/utils/exception.dart';
 
-
 class QuotationProvider extends ChangeNotifier {
   static final _logger = Logger('provider.payment.quotation');
-  Resource<PaymentQuote> _quotation = Resource(data: null, isLoading: false, error: null);
+  Resource<PaymentQuote> _quotation = Resource(
+    data: null,
+    isLoading: false,
+    error: null,
+  );
   late OrganizationsProvider _organizations;
   bool _isLoaded = false;
   PaymentIntent? _lastIntent;
   final QuotationIntentBuilder _intentBuilder = QuotationIntentBuilder();
 
   void update(
-    OrganizationsProvider venue, 
+    OrganizationsProvider venue,
     PaymentAmountProvider payment,
-    WalletsController wallets,
+    PaymentSourceController sources,
     PaymentFlowProvider flow,
     RecipientsProvider recipients,
     PaymentMethodsProvider _,
@@ -43,7 +46,7 @@ class QuotationProvider extends ChangeNotifier {
     _organizations = venue;
     final intent = _intentBuilder.build(
       payment: payment,
-      wallets: wallets,
+      sources: sources,
       flow: flow,
       recipients: recipients,
     );
@@ -58,7 +61,8 @@ class QuotationProvider extends ChangeNotifier {
   bool get isLoading => _quotation.isLoading;
   Exception? get error => _quotation.error;
   bool get canRefresh => _lastIntent != null;
-  bool get isReady => _isLoaded && !_quotation.isLoading && _quotation.error == null;
+  bool get isReady =>
+      _isLoaded && !_quotation.isLoading && _quotation.error == null;
 
   DateTime? get quoteExpiresAt {
     final expiresAtUnixMs = quotation?.fxQuote?.expiresAtUnixMs;
@@ -66,10 +70,10 @@ class QuotationProvider extends ChangeNotifier {
     return DateTime.fromMillisecondsSinceEpoch(expiresAtUnixMs, isUtc: true);
   }
 
-
   Asset? get fee => _assetFromMoney(quotation?.expectedFeeTotal);
   Asset? get total => _assetFromMoney(quotation?.debitAmount);
-  Asset? get recipientGets => _assetFromMoney(quotation?.expectedSettlementAmount);
+  Asset? get recipientGets =>
+      _assetFromMoney(quotation?.expectedSettlementAmount);
 
   Asset? _assetFromMoney(Money? money) {
     if (money == null) return null;
@@ -88,26 +92,32 @@ class QuotationProvider extends ChangeNotifier {
   }
 
   Future<PaymentQuote?> getQuotation(PaymentIntent intent) async {
-    if (!_organizations.isOrganizationSet) throw StateError('Organization is not set');
+    if (!_organizations.isOrganizationSet) {
+      throw StateError('Organization is not set');
+    }
     _lastIntent = intent;
     try {
       _setResource(_quotation.copyWith(isLoading: true, error: null));
       final response = await QuotationService.getQuotation(
-        _organizations.current.id, 
+        _organizations.current.id,
         QuotePaymentRequest(
           idempotencyKey: Uuid().v4(),
           intent: intent.toDTO(),
         ),
       );
       _isLoaded = true;
-      _setResource(_quotation.copyWith(data: response, isLoading: false, error: null));
+      _setResource(
+        _quotation.copyWith(data: response, isLoading: false, error: null),
+      );
     } catch (e, st) {
       _logger.warning('Failed to get quotation', e, st);
-      _setResource(_quotation.copyWith(
-        data: null,
-        error: toException(e),
-        isLoading: false,
-      ));
+      _setResource(
+        _quotation.copyWith(
+          data: null,
+          error: toException(e),
+          isLoading: false,
+        ),
+      );
     }
     return _quotation.data;
   }

frontend/pshared/lib/provider/payment/source.dart

@@ -0,0 +1,33 @@
+import 'package:flutter/foundation.dart';
+
+import 'package:pshared/models/payment/source.dart';
+import 'package:pshared/provider/ledger.dart';
+import 'package:pshared/provider/payment/wallets.dart';
+
+class PaymentSourceProvider extends ChangeNotifier {
+  List<PaymentSource> _sources = const [];
+
+  List<PaymentSource> get sources => _sources;
+
+  void update(
+    WalletsProvider walletsProvider,
+    LedgerAccountsProvider ledgerProvider,
+  ) {
+    final nextSources = <PaymentSource>[
+      ...walletsProvider.wallets.map(PaymentSource.wallet),
+      ...ledgerProvider.accounts.map(PaymentSource.ledger),
+    ];
+
+    final currentKeys = _sources
+        .map((source) => source.key)
+        .toList(growable: false);
+    final nextKeys = nextSources
+        .map((source) => source.key)
+        .toList(growable: false);
+
+    if (listEquals(currentKeys, nextKeys)) return;
+
+    _sources = nextSources;
+    notifyListeners();
+  }
+}