fix: correct credential-on-file network data

src/main/java/com/mercadopago/client/order/OrderAutomaticPaymentsRequest.java

@@ -2,6 +2,7 @@
 
 import lombok.Builder;
 import lombok.Getter;
+import java.util.Map;
 
 // API version: 1ff4822a-2dfd-4393-800e-a562edb3fe32
 
@@ -24,4 +25,7 @@ public class OrderAutomaticPaymentsRequest {
 
   /** Due date for the payment, in ISO 8601 format. */
   private String dueDate;
+
+  /** Subscription metadata (id, sequence, and invoice) for the automatic payment. */
+  private Map<String, Object> subscription;
 }

src/main/java/com/mercadopago/client/payment/PaymentNetworkDataRequest.java

@@ -6,6 +6,6 @@
 @Getter
 @Builder
 public class PaymentNetworkDataRequest {
-  private final String networkTransactionId;
+  private final String transactionId;
   private final String transactionLinkId;
 }

src/main/java/com/mercadopago/client/payment/PaymentNetworkTransactionDataRequest.java

@@ -13,4 +13,4 @@
 public class PaymentNetworkTransactionDataRequest {
   /** Network transaction identifier assigned by the card brand (Visa/Mastercard). */
   private final String networkTransactionId;
-} 
+}

src/main/java/com/mercadopago/client/payment/PaymentPointOfInteractionRequest.java

@@ -23,6 +23,5 @@ public class PaymentPointOfInteractionRequest {
   /** Transaction data associated with the point of interaction. */
   private final PaymentTransactionDataRequest transactionData;
 
-  private final PaymentNetworkDataRequest networkData;
 
 }

src/main/java/com/mercadopago/client/payment/PaymentTransactionDataRequest.java

@@ -25,6 +25,8 @@ public class PaymentTransactionDataRequest {
   private String billingDate;
   /** Legacy card-network transaction identifier within transaction data. */
   private String networkTransactionId;
+  /** Card-network identifiers for this credential-on-file transaction. */
+  private PaymentNetworkDataRequest networkData;
   /**
    * Whether this is the first transaction for a CREDENTIAL_ON_FILE payment.
    * Replaces the legacy {@code firstTimeUse} field in new integrations.

src/main/java/com/mercadopago/resources/order/OrderAutomaticPayments.java

@@ -2,6 +2,7 @@
 
 import lombok.Builder;
 import lombok.Getter;
+import java.util.Map;
 
 // API version: 1ff4822a-2dfd-4393-800e-a562edb3fe32
 
@@ -24,4 +25,7 @@ public class OrderAutomaticPayments {
 
     /** ISO 8601 date-time by which the automatic payment must be completed. */
     private String dueDate;
-}
+
+    /** Subscription metadata (id, sequence, and invoice) returned for the automatic payment. */
+    private Map<String, Object> subscription;
+}

src/main/java/com/mercadopago/resources/payment/PaymentExpanded.java

@@ -1,6 +1,5 @@
 package com.mercadopago.resources.payment;
 
-import com.mercadopago.client.payment.PaymentNetworkTransactionDataRequest;
 import lombok.Getter;
 
 /**
@@ -25,6 +24,6 @@ public class PaymentExpanded {
   @Getter
   public static class Gateway {
     /** Network transaction data reference from the payment gateway. */
-    private PaymentNetworkTransactionDataRequest reference;
+    private PaymentGatewayReference reference;
   }
-} 
+} 

src/main/java/com/mercadopago/resources/payment/PaymentGatewayReference.java

@@ -0,0 +1,15 @@
+package com.mercadopago.resources.payment;
+
+import lombok.Getter;
+
+/**
+ * Network references returned by an expanded payment gateway response.
+ */
+@Getter
+public class PaymentGatewayReference {
+  /** Card-network transaction identifier. */
+  private String networkTransactionId;
+
+  /** Card-network transaction and link identifiers. */
+  private PaymentNetworkData networkData;
+}

src/main/java/com/mercadopago/resources/payment/PaymentNetworkData.java

@@ -4,6 +4,6 @@
 
 @Getter
 public class PaymentNetworkData {
-  private String networkTransactionId;
+  private String transactionId;
   private String transactionLinkId;
 }

src/main/java/com/mercadopago/resources/payment/PaymentPointOfInteraction.java

@@ -28,5 +28,4 @@ public class PaymentPointOfInteraction {
   /** Transaction-level data from the interaction channel (e.g. QR code, ticket URL). */
   private PaymentTransactionData transactionData;
 
-  private PaymentNetworkData networkData;
 }

src/main/java/com/mercadopago/resources/payment/PaymentTransactionData.java

@@ -55,6 +55,8 @@ public class PaymentTransactionData {
 
   /** Legacy card-network transaction identifier within transaction data. */
   private String networkTransactionId;
+  /** Card-network identifiers for this credential-on-file transaction. */
+  private PaymentNetworkData networkData;
 
   /**
    * Whether this is the first transaction for a CREDENTIAL_ON_FILE payment.

src/test/java/com/mercadopago/client/order/OrderCreateRequestSerializationTest.java

@@ -2,6 +2,7 @@
 
 import com.google.gson.JsonObject;
 import com.mercadopago.serialization.Serializer;
+import java.util.Map;
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
 
@@ -116,4 +117,22 @@ void existingBuilderStillWorksWithoutNewFields() {
         Assertions.assertFalse(json.has("currency"));
         Assertions.assertFalse(json.has("integration_data"));
     }
+
+    @Test
+    void automaticPaymentsSubscriptionSerializesWithItsNestedFields() {
+        OrderAutomaticPaymentsRequest request =
+                OrderAutomaticPaymentsRequest.builder()
+                        .subscription(
+                                Map.of(
+                                        "id", "subscription-1",
+                                        "sequence", Map.of("number", 1, "total", 12),
+                                        "invoice", Map.of("id", "invoice-1", "period", Map.of("interval", 1, "type", "month"))))
+                        .build();
+
+        JsonObject subscription = Serializer.serializeToJson(request).getAsJsonObject("subscription");
+
+        Assertions.assertEquals("subscription-1", subscription.get("id").getAsString());
+        Assertions.assertEquals(12, subscription.getAsJsonObject("sequence").get("total").getAsInt());
+        Assertions.assertEquals("month", subscription.getAsJsonObject("invoice").getAsJsonObject("period").get("type").getAsString());
+    }
 }

src/test/java/com/mercadopago/resources/order/OrderAutomaticPaymentsTest.java

@@ -0,0 +1,24 @@
+package com.mercadopago.resources.order;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import com.mercadopago.exceptions.MPJsonParseException;
+import com.mercadopago.serialization.Serializer;
+import java.util.Map;
+import org.junit.jupiter.api.Test;
+
+class OrderAutomaticPaymentsTest {
+
+  @Test
+  void subscriptionDeserializesFromResponse() throws MPJsonParseException {
+    Order order =
+        Serializer.deserializeFromJson(
+            Order.class,
+            "{\"transactions\":{\"payments\":[{\"automatic_payments\":{\"subscription\":{\"id\":\"subscription-1\",\"sequence\":{\"number\":1,\"total\":12}}}}]}}");
+
+    Map<String, Object> subscription =
+        order.getTransactions().getPayments().get(0).getAutomaticPayments().getSubscription();
+    assertEquals("subscription-1", subscription.get("id"));
+    assertEquals(12.0, ((Map<?, ?>) subscription.get("sequence")).get("total"));
+  }
+}

src/test/java/com/mercadopago/resources/payment/PaymentExpandedTest.java

@@ -0,0 +1,21 @@
+package com.mercadopago.resources.payment;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import com.mercadopago.exceptions.MPJsonParseException;
+import com.mercadopago.serialization.Serializer;
+import org.junit.jupiter.api.Test;
+
+class PaymentExpandedTest {
+
+  @Test
+  void gatewayReferenceDeserializesNetworkData() throws MPJsonParseException {
+    Payment payment =
+        Serializer.deserializeFromJson(
+            Payment.class,
+            "{\"expanded\":{\"gateway\":{\"reference\":{\"network_data\":{\"transaction_id\":\"ABC123\",\"transaction_link_id\":\"550e8400\"}}}}}");
+
+    assertEquals("ABC123", payment.getExpanded().getGateway().getReference().getNetworkData().getTransactionId());
+    assertEquals("550e8400", payment.getExpanded().getGateway().getReference().getNetworkData().getTransactionLinkId());
+  }
+}