WIP: integration with ledger

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();
     }