fee treatment added

frontend/pshared/lib/data/dto/payment/intent/payment.dart

@@ -23,6 +23,9 @@ class PaymentIntentDTO {
   @JsonKey(name: 'settlement_currency')
   final String? settlementCurrency;
 
+  @JsonKey(name: "fee_treatment")
+  final String? feeTreatment;
+
   final Map<String, String>? attributes;
   final CustomerDTO? customer;
 
@@ -36,6 +39,7 @@ class PaymentIntentDTO {
     this.settlementCurrency,
     this.attributes,
     this.customer,
+    this.feeTreatment,
   });
 
   factory PaymentIntentDTO.fromJson(Map<String, dynamic> json) => _$PaymentIntentDTOFromJson(json);

frontend/pshared/lib/data/mapper/payment/enums.dart

@@ -5,6 +5,7 @@ import 'package:pshared/models/payment/kind.dart';
 import 'package:pshared/models/payment/type.dart';
 import 'package:pshared/models/payment/settlement_mode.dart';
 
+
 PaymentKind paymentKindFromValue(String? value) {
   switch (value) {
     case 'payout':

frontend/pshared/lib/data/mapper/payment/fees/treatment.dart

@@ -0,0 +1,26 @@
+import 'package:pshared/models/payment/fees/treatment.dart';
+
+
+FeeTreatment feeTreatmentFromValue(String? value) {
+  switch (value) {
+    case 'add_to_source':
+      return FeeTreatment.addToSource;
+    case 'deduct_from_destination':
+      return FeeTreatment.deductFromDestination;
+    case 'unspecified':
+      return FeeTreatment.unspecified;
+    default:
+      throw ArgumentError('Unknown FeeTreatment value: $value');
+  }
+}
+
+String feeTreatmentToValue(FeeTreatment value) {
+  switch (value) {
+    case FeeTreatment.addToSource:
+      return 'add_to_source';
+    case FeeTreatment.deductFromDestination:
+      return 'deduct_from_destination';
+    case FeeTreatment.unspecified:
+      return 'unspecified';
+  }
+}

frontend/pshared/lib/data/mapper/payment/intent/payment.dart

@@ -1,4 +1,5 @@
 import 'package:pshared/data/dto/payment/intent/payment.dart';
+import 'package:pshared/data/mapper/payment/fees/treatment.dart';
 import 'package:pshared/data/mapper/payment/payment.dart';
 import 'package:pshared/data/mapper/payment/enums.dart';
 import 'package:pshared/data/mapper/payment/intent/customer.dart';
@@ -18,6 +19,7 @@ extension PaymentIntentMapper on PaymentIntent {
     settlementCurrency: settlementCurrency,
     attributes: attributes,
     customer: customer?.toDTO(),
+    feeTreatment: feeTreatmentToValue(feeTreatment),
   );
 }
 
@@ -32,5 +34,6 @@ extension PaymentIntentDTOMapper on PaymentIntentDTO {
     settlementCurrency: settlementCurrency,
     attributes: attributes,
     customer: customer?.toDomain(),
+    feeTreatment: feeTreatmentFromValue(feeTreatment),
   );
 }

frontend/pshared/lib/models/payment/fees/treatment.dart

@@ -0,0 +1,5 @@
+enum FeeTreatment {
+  addToSource,
+  deductFromDestination,
+  unspecified,
+}

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

@@ -1,3 +1,4 @@
+import 'package:pshared/models/payment/fees/treatment.dart';
 import 'package:pshared/models/payment/fx/intent.dart';
 import 'package:pshared/models/payment/kind.dart';
 import 'package:pshared/models/payment/customer.dart';
@@ -12,6 +13,7 @@ class PaymentIntent {
   final PaymentMethodData? destination;
   final Money? amount;
   final FxIntent? fx;
+  final FeeTreatment feeTreatment;
   final SettlementMode settlementMode;
   final String? settlementCurrency;
   final Map<String, String>? attributes;
@@ -27,5 +29,6 @@ class PaymentIntent {
     this.settlementCurrency,
     this.attributes,
     this.customer,
+    required this.feeTreatment,
   });
 }

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

@@ -2,6 +2,7 @@ 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/customer.dart';
+import 'package:pshared/models/payment/fees/treatment.dart';
 import 'package:pshared/models/payment/kind.dart';
 import 'package:pshared/models/payment/methods/card.dart';
 import 'package:pshared/models/payment/methods/crypto_address.dart';
@@ -63,7 +64,8 @@ class QuotationIntentBuilder {
         ) 
       ),
       fx: fxIntent,
-      settlementMode: payment.payerCoversFee ? SettlementMode.fixReceived : SettlementMode.fixSource,
+      feeTreatment: payment.payerCoversFee ? FeeTreatment.addToSource : FeeTreatment.deductFromDestination,
+      settlementMode: SettlementMode.fixSource,
       settlementCurrency: FxIntentHelper.resolveSettlementCurrency(
         amount: amount,
         fx: fxIntent,