diff --git a/common/transport/http/src/main/java/org/thingsboard/server/transport/http/DeviceApiController.java b/common/transport/http/src/main/java/org/thingsboard/server/transport/http/DeviceApiController.java
index f8212b1009..e919268cae 100644
--- a/common/transport/http/src/main/java/org/thingsboard/server/transport/http/DeviceApiController.java
+++ b/common/transport/http/src/main/java/org/thingsboard/server/transport/http/DeviceApiController.java
@@ -431,22 +431,17 @@ public class DeviceApiController implements TbTransportService {
                             .setDeviceIdMSB(sessionInfo.getDeviceIdMSB())
                             .setDeviceIdLSB(sessionInfo.getDeviceIdLSB())
                             .setType(firmwareType.name()).build();
-                    transportContext.getTransportService().process(sessionInfo, requestMsg, new GetOtaPackageCallback(transportContext,responseWriter, title, version, size, chunk));
+                    transportContext.getTransportService().process(sessionInfo, requestMsg, new GetOtaPackageCallback(transportContext, responseWriter, title, version, size, chunk));
                 }));
         return responseWriter;
     }
 
+    @RequiredArgsConstructor
     static class DeviceAuthCallback implements TransportServiceCallback<ValidateDeviceCredentialsResponse> {
         private final TransportContext transportContext;
         private final DeferredResult<ResponseEntity> responseWriter;
         private final Consumer<SessionInfoProto> onSuccess;
 
-        DeviceAuthCallback(TransportContext transportContext, DeferredResult<ResponseEntity> responseWriter, Consumer<SessionInfoProto> onSuccess) {
-            this.transportContext = transportContext;
-            this.responseWriter = responseWriter;
-            this.onSuccess = onSuccess;
-        }
-
         @Override
         public void onSuccess(ValidateDeviceCredentialsResponse msg) {
             if (msg.hasDeviceInfo()) {
@@ -469,13 +464,10 @@ public class DeviceApiController implements TbTransportService {
         }
     }
 
+    @RequiredArgsConstructor
     static class DeviceProvisionCallback implements TransportServiceCallback<ProvisionDeviceResponseMsg> {
         private final DeferredResult<ResponseEntity> responseWriter;
 
-        DeviceProvisionCallback(DeferredResult<ResponseEntity> responseWriter) {
-            this.responseWriter = responseWriter;
-        }
-
         @Override
         public void onSuccess(ProvisionDeviceResponseMsg msg) {
             responseWriter.setResult(new ResponseEntity<>(JsonConverter.toJson(msg).toString(), HttpStatus.OK));
@@ -494,22 +486,14 @@ public class DeviceApiController implements TbTransportService {
         }
     }
 
+    @RequiredArgsConstructor
     static class GetOtaPackageCallback implements TransportServiceCallback<TransportProtos.GetOtaPackageResponseMsg> {
         private final TransportContext transportContext;
         private final DeferredResult<ResponseEntity> responseWriter;
         private final String title;
         private final String version;
-        private final int chuckSize;
-        private final int chuck;
-
-        GetOtaPackageCallback(TransportContext transportContext, DeferredResult<ResponseEntity> responseWriter, String title, String version, int chuckSize, int chuck) {
-            this.transportContext = transportContext;
-            this.responseWriter = responseWriter;
-            this.title = title;
-            this.version = version;
-            this.chuckSize = chuckSize;
-            this.chuck = chuck;
-        }
+        private final int chunkSize;
+        private final int chunk;
 
         @Override
         public void onSuccess(TransportProtos.GetOtaPackageResponseMsg otaPackageResponseMsg) {
@@ -517,7 +501,7 @@ public class DeviceApiController implements TbTransportService {
                 responseWriter.setResult(new ResponseEntity<>(HttpStatus.NOT_FOUND));
             } else if (title.equals(otaPackageResponseMsg.getTitle()) && version.equals(otaPackageResponseMsg.getVersion())) {
                 String otaPackageId = new UUID(otaPackageResponseMsg.getOtaPackageIdMSB(), otaPackageResponseMsg.getOtaPackageIdLSB()).toString();
-                ByteArrayResource resource = new ByteArrayResource(transportContext.getOtaPackageDataCache().get(otaPackageId, chuckSize, chuck));
+                ByteArrayResource resource = new ByteArrayResource(transportContext.getOtaPackageDataCache().get(otaPackageId, chunkSize, chunk));
                 ResponseEntity<ByteArrayResource> response = ResponseEntity.ok()
                         .header(HttpHeaders.CONTENT_DISPOSITION, "attachment;filename=" + otaPackageResponseMsg.getFileName())
                         .header("x-filename", otaPackageResponseMsg.getFileName())
diff --git a/common/transport/http/src/test/java/org/thingsboard/server/transport/http/DeviceApiControllerTest.java b/common/transport/http/src/test/java/org/thingsboard/server/transport/http/DeviceApiControllerTest.java
index e439d0d3a4..b033bf2355 100644
--- a/common/transport/http/src/test/java/org/thingsboard/server/transport/http/DeviceApiControllerTest.java
+++ b/common/transport/http/src/test/java/org/thingsboard/server/transport/http/DeviceApiControllerTest.java
@@ -5,7 +5,7 @@
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
@@ -33,7 +33,8 @@ class DeviceApiControllerTest {
     void deviceAuthCallbackTest() {
         TransportContext transportContext = Mockito.mock(TransportContext.class);
         DeferredResult<ResponseEntity> responseWriter = Mockito.mock(DeferredResult.class);
-        Consumer<TransportProtos.SessionInfoProto> onSuccess = x -> {};
+        Consumer<TransportProtos.SessionInfoProto> onSuccess = x -> {
+        };
         var callback = new DeviceApiController.DeviceAuthCallback(transportContext, responseWriter, onSuccess);
 
         callback.onError(new HttpMessageNotReadableException("JSON incorrect syntax"));
@@ -59,23 +60,23 @@ class DeviceApiControllerTest {
         callback.onError(new RuntimeException("oops it is run time error"));
     }
 
-@Test
+    @Test
     void getOtaPackageCallback() {
-          TransportContext transportContext = Mockito.mock(TransportContext.class);
-          DeferredResult<ResponseEntity> responseWriter = Mockito.mock(DeferredResult.class);
-          String title = "Title";
-          String version = "version";
-          int chuckSize = 11;
-          int chuck = 3;
+        TransportContext transportContext = Mockito.mock(TransportContext.class);
+        DeferredResult<ResponseEntity> responseWriter = Mockito.mock(DeferredResult.class);
+        String title = "Title";
+        String version = "version";
+        int chunkSize = 11;
+        int chunk = 3;
 
-          var callback = new DeviceApiController.GetOtaPackageCallback(transportContext, responseWriter, title, version, chuckSize, chuck);
+        var callback = new DeviceApiController.GetOtaPackageCallback(transportContext, responseWriter, title, version, chunkSize, chunk);
 
-          callback.onError(new HttpMessageNotReadableException("JSON incorrect syntax"));
+        callback.onError(new HttpMessageNotReadableException("JSON incorrect syntax"));
 
-          callback.onError(new JsonParseException("Json ; expected"));
+        callback.onError(new JsonParseException("Json ; expected"));
 
-          callback.onError(new IOException("not found"));
+        callback.onError(new IOException("not found"));
 
-          callback.onError(new RuntimeException("oops it is run time error"));
+        callback.onError(new RuntimeException("oops it is run time error"));
     }
 }