diff --git a/build.yaml b/build.yaml
index fe1f152b..110a39f2 100644
--- a/build.yaml
+++ b/build.yaml
@@ -5,15 +5,18 @@ targets:
         options:
           # Options configure how source code is generated for every
           # `@JsonSerializable`-annotated class in the package.
+
           any_map: false
           checked: false
           create_factory: true
           create_to_json: true
           disallow_unrecognized_keys: false
-          # If true, generated toJson methods will explicitly call toJson on nested objects.
-          explicit_to_json: true
-          field_rename: none
-          generic_argument_factories: false
           ignore_unannotated: false
           include_if_null: true
           nullable: true
+          field_rename: none
+          generic_argument_factories: false
+
+          # If true, generated toJson methods will explicitly call toJson on nested objects.
+          explicit_to_json: true
+
diff --git a/lib/src/response/response.dart b/lib/src/response/response.dart
new file mode 100644
index 00000000..f0ab1514
--- /dev/null
+++ b/lib/src/response/response.dart
@@ -0,0 +1,28 @@
+import 'package:freezed_annotation/freezed_annotation.dart';
+import 'package:tdproto_dart/tdproto_dart.dart';
+
+part 'response.freezed.dart';
+part 'response.g.dart';
+
+/// Response
+@freezed
+abstract class Response with _$Response {
+  const factory Response({
+    /// Debug time
+    @JsonKey(name: '_time') String time,
+
+    /// Whether http status code is 200 or not
+    @JsonKey(name: 'ok') @required bool ok,
+
+    /// Requested data
+    @JsonKey(name: 'result') dynamic result,
+
+    /// Error code
+    @JsonKey(name: 'error') String error,
+
+    /// Details about the error
+    @JsonKey(name: 'details') Map<String, dynamic> details,
+  }) = _Response;
+
+  factory Response.fromJson(Map<String, dynamic> json) => _$ResponseFromJson(json);
+}
diff --git a/lib/src/response/response.freezed.dart b/lib/src/response/response.freezed.dart
new file mode 100644
index 00000000..815d034e
--- /dev/null
+++ b/lib/src/response/response.freezed.dart
@@ -0,0 +1,257 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+// ignore_for_file: deprecated_member_use, deprecated_member_use_from_same_package, use_function_type_syntax_for_parameters, unnecessary_const, avoid_init_to_null, invalid_override_different_default_values_named, prefer_expression_function_bodies
+
+part of 'response.dart';
+
+// **************************************************************************
+// FreezedGenerator
+// **************************************************************************
+
+T _$identity<T>(T value) => value;
+Response _$ResponseFromJson(Map<String, dynamic> json) {
+  return _Response.fromJson(json);
+}
+
+/// @nodoc
+class _$ResponseTearOff {
+  const _$ResponseTearOff();
+
+// ignore: unused_element
+  _Response call(
+      {@JsonKey(name: '_time') String time,
+      @required @JsonKey(name: 'ok') bool ok,
+      @JsonKey(name: 'result') dynamic result,
+      @JsonKey(name: 'error') String error,
+      @JsonKey(name: 'details') Map<String, dynamic> details}) {
+    return _Response(
+      time: time,
+      ok: ok,
+      result: result,
+      error: error,
+      details: details,
+    );
+  }
+
+// ignore: unused_element
+  Response fromJson(Map<String, Object> json) {
+    return Response.fromJson(json);
+  }
+}
+
+/// @nodoc
+// ignore: unused_element
+const $Response = _$ResponseTearOff();
+
+/// @nodoc
+mixin _$Response {
+  /// Debug time
+  @JsonKey(name: '_time')
+  String get time;
+
+  /// Whether http status code is 200 or not
+  @JsonKey(name: 'ok')
+  bool get ok;
+
+  /// Requested data
+  @JsonKey(name: 'result')
+  dynamic get result;
+
+  /// Error code
+  @JsonKey(name: 'error')
+  String get error;
+
+  /// Details about the error
+  @JsonKey(name: 'details')
+  Map<String, dynamic> get details;
+
+  Map<String, dynamic> toJson();
+  $ResponseCopyWith<Response> get copyWith;
+}
+
+/// @nodoc
+abstract class $ResponseCopyWith<$Res> {
+  factory $ResponseCopyWith(Response value, $Res Function(Response) then) = _$ResponseCopyWithImpl<$Res>;
+  $Res call(
+      {@JsonKey(name: '_time') String time,
+      @JsonKey(name: 'ok') bool ok,
+      @JsonKey(name: 'result') dynamic result,
+      @JsonKey(name: 'error') String error,
+      @JsonKey(name: 'details') Map<String, dynamic> details});
+}
+
+/// @nodoc
+class _$ResponseCopyWithImpl<$Res> implements $ResponseCopyWith<$Res> {
+  _$ResponseCopyWithImpl(this._value, this._then);
+
+  final Response _value;
+  // ignore: unused_field
+  final $Res Function(Response) _then;
+
+  @override
+  $Res call({
+    Object time = freezed,
+    Object ok = freezed,
+    Object result = freezed,
+    Object error = freezed,
+    Object details = freezed,
+  }) {
+    return _then(_value.copyWith(
+      time: time == freezed ? _value.time : time as String,
+      ok: ok == freezed ? _value.ok : ok as bool,
+      result: result == freezed ? _value.result : result as dynamic,
+      error: error == freezed ? _value.error : error as String,
+      details: details == freezed ? _value.details : details as Map<String, dynamic>,
+    ));
+  }
+}
+
+/// @nodoc
+abstract class _$ResponseCopyWith<$Res> implements $ResponseCopyWith<$Res> {
+  factory _$ResponseCopyWith(_Response value, $Res Function(_Response) then) = __$ResponseCopyWithImpl<$Res>;
+  @override
+  $Res call(
+      {@JsonKey(name: '_time') String time,
+      @JsonKey(name: 'ok') bool ok,
+      @JsonKey(name: 'result') dynamic result,
+      @JsonKey(name: 'error') String error,
+      @JsonKey(name: 'details') Map<String, dynamic> details});
+}
+
+/// @nodoc
+class __$ResponseCopyWithImpl<$Res> extends _$ResponseCopyWithImpl<$Res> implements _$ResponseCopyWith<$Res> {
+  __$ResponseCopyWithImpl(_Response _value, $Res Function(_Response) _then)
+      : super(_value, (v) => _then(v as _Response));
+
+  @override
+  _Response get _value => super._value as _Response;
+
+  @override
+  $Res call({
+    Object time = freezed,
+    Object ok = freezed,
+    Object result = freezed,
+    Object error = freezed,
+    Object details = freezed,
+  }) {
+    return _then(_Response(
+      time: time == freezed ? _value.time : time as String,
+      ok: ok == freezed ? _value.ok : ok as bool,
+      result: result == freezed ? _value.result : result as dynamic,
+      error: error == freezed ? _value.error : error as String,
+      details: details == freezed ? _value.details : details as Map<String, dynamic>,
+    ));
+  }
+}
+
+@JsonSerializable()
+
+/// @nodoc
+class _$_Response implements _Response {
+  const _$_Response(
+      {@JsonKey(name: '_time') this.time,
+      @required @JsonKey(name: 'ok') this.ok,
+      @JsonKey(name: 'result') this.result,
+      @JsonKey(name: 'error') this.error,
+      @JsonKey(name: 'details') this.details})
+      : assert(ok != null);
+
+  factory _$_Response.fromJson(Map<String, dynamic> json) => _$_$_ResponseFromJson(json);
+
+  @override
+
+  /// Debug time
+  @JsonKey(name: '_time')
+  final String time;
+  @override
+
+  /// Whether http status code is 200 or not
+  @JsonKey(name: 'ok')
+  final bool ok;
+  @override
+
+  /// Requested data
+  @JsonKey(name: 'result')
+  final dynamic result;
+  @override
+
+  /// Error code
+  @JsonKey(name: 'error')
+  final String error;
+  @override
+
+  /// Details about the error
+  @JsonKey(name: 'details')
+  final Map<String, dynamic> details;
+
+  @override
+  String toString() {
+    return 'Response(time: $time, ok: $ok, result: $result, error: $error, details: $details)';
+  }
+
+  @override
+  bool operator ==(dynamic other) {
+    return identical(this, other) ||
+        (other is _Response &&
+            (identical(other.time, time) || const DeepCollectionEquality().equals(other.time, time)) &&
+            (identical(other.ok, ok) || const DeepCollectionEquality().equals(other.ok, ok)) &&
+            (identical(other.result, result) || const DeepCollectionEquality().equals(other.result, result)) &&
+            (identical(other.error, error) || const DeepCollectionEquality().equals(other.error, error)) &&
+            (identical(other.details, details) || const DeepCollectionEquality().equals(other.details, details)));
+  }
+
+  @override
+  int get hashCode =>
+      runtimeType.hashCode ^
+      const DeepCollectionEquality().hash(time) ^
+      const DeepCollectionEquality().hash(ok) ^
+      const DeepCollectionEquality().hash(result) ^
+      const DeepCollectionEquality().hash(error) ^
+      const DeepCollectionEquality().hash(details);
+
+  @override
+  _$ResponseCopyWith<_Response> get copyWith => __$ResponseCopyWithImpl<_Response>(this, _$identity);
+
+  @override
+  Map<String, dynamic> toJson() {
+    return _$_$_ResponseToJson(this);
+  }
+}
+
+abstract class _Response implements Response {
+  const factory _Response(
+      {@JsonKey(name: '_time') String time,
+      @required @JsonKey(name: 'ok') bool ok,
+      @JsonKey(name: 'result') dynamic result,
+      @JsonKey(name: 'error') String error,
+      @JsonKey(name: 'details') Map<String, dynamic> details}) = _$_Response;
+
+  factory _Response.fromJson(Map<String, dynamic> json) = _$_Response.fromJson;
+
+  @override
+
+  /// Debug time
+  @JsonKey(name: '_time')
+  String get time;
+  @override
+
+  /// Whether http status code is 200 or not
+  @JsonKey(name: 'ok')
+  bool get ok;
+  @override
+
+  /// Requested data
+  @JsonKey(name: 'result')
+  dynamic get result;
+  @override
+
+  /// Error code
+  @JsonKey(name: 'error')
+  String get error;
+  @override
+
+  /// Details about the error
+  @JsonKey(name: 'details')
+  Map<String, dynamic> get details;
+  @override
+  _$ResponseCopyWith<_Response> get copyWith;
+}
diff --git a/lib/src/response/response.g.dart b/lib/src/response/response.g.dart
new file mode 100644
index 00000000..92f86615
--- /dev/null
+++ b/lib/src/response/response.g.dart
@@ -0,0 +1,25 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'response.dart';
+
+// **************************************************************************
+// JsonSerializableGenerator
+// **************************************************************************
+
+_$_Response _$_$_ResponseFromJson(Map<String, dynamic> json) {
+  return _$_Response(
+    time: json['_time'] as String,
+    ok: json['ok'] as bool,
+    result: json['result'],
+    error: json['error'] as String,
+    details: json['details'] as Map<String, dynamic>,
+  );
+}
+
+Map<String, dynamic> _$_$_ResponseToJson(_$_Response instance) => <String, dynamic>{
+      '_time': instance.time,
+      'ok': instance.ok,
+      'result': instance.result,
+      'error': instance.error,
+      'details': instance.details,
+    };
diff --git a/test/test_utils/mocks/mock_message.freezed.dart b/test/test_utils/mocks/mock_message.freezed.dart
index 3f155d6c..ed17776b 100644
--- a/test/test_utils/mocks/mock_message.freezed.dart
+++ b/test/test_utils/mocks/mock_message.freezed.dart
@@ -18,8 +18,7 @@ class _$MockMessageTearOff {
 
 // ignore: unused_element
   _MockMessage call(
-      {@JsonKey(name: 'text') String text,
-      @required @JsonKey(name: 'markup') List<MarkupEntity> markup}) {
+      {@JsonKey(name: 'text') String text, @required @JsonKey(name: 'markup') List<MarkupEntity> markup}) {
     return _MockMessage(
       text: text,
       markup: markup,
@@ -49,12 +48,8 @@ mixin _$MockMessage {
 
 /// @nodoc
 abstract class $MockMessageCopyWith<$Res> {
-  factory $MockMessageCopyWith(
-          MockMessage value, $Res Function(MockMessage) then) =
-      _$MockMessageCopyWithImpl<$Res>;
-  $Res call(
-      {@JsonKey(name: 'text') String text,
-      @JsonKey(name: 'markup') List<MarkupEntity> markup});
+  factory $MockMessageCopyWith(MockMessage value, $Res Function(MockMessage) then) = _$MockMessageCopyWithImpl<$Res>;
+  $Res call({@JsonKey(name: 'text') String text, @JsonKey(name: 'markup') List<MarkupEntity> markup});
 }
 
 /// @nodoc
@@ -78,22 +73,16 @@ class _$MockMessageCopyWithImpl<$Res> implements $MockMessageCopyWith<$Res> {
 }
 
 /// @nodoc
-abstract class _$MockMessageCopyWith<$Res>
-    implements $MockMessageCopyWith<$Res> {
-  factory _$MockMessageCopyWith(
-          _MockMessage value, $Res Function(_MockMessage) then) =
+abstract class _$MockMessageCopyWith<$Res> implements $MockMessageCopyWith<$Res> {
+  factory _$MockMessageCopyWith(_MockMessage value, $Res Function(_MockMessage) then) =
       __$MockMessageCopyWithImpl<$Res>;
   @override
-  $Res call(
-      {@JsonKey(name: 'text') String text,
-      @JsonKey(name: 'markup') List<MarkupEntity> markup});
+  $Res call({@JsonKey(name: 'text') String text, @JsonKey(name: 'markup') List<MarkupEntity> markup});
 }
 
 /// @nodoc
-class __$MockMessageCopyWithImpl<$Res> extends _$MockMessageCopyWithImpl<$Res>
-    implements _$MockMessageCopyWith<$Res> {
-  __$MockMessageCopyWithImpl(
-      _MockMessage _value, $Res Function(_MockMessage) _then)
+class __$MockMessageCopyWithImpl<$Res> extends _$MockMessageCopyWithImpl<$Res> implements _$MockMessageCopyWith<$Res> {
+  __$MockMessageCopyWithImpl(_MockMessage _value, $Res Function(_MockMessage) _then)
       : super(_value, (v) => _then(v as _MockMessage));
 
   @override
@@ -115,13 +104,10 @@ class __$MockMessageCopyWithImpl<$Res> extends _$MockMessageCopyWithImpl<$Res>
 
 /// @nodoc
 class _$_MockMessage implements _MockMessage {
-  const _$_MockMessage(
-      {@JsonKey(name: 'text') this.text,
-      @required @JsonKey(name: 'markup') this.markup})
+  const _$_MockMessage({@JsonKey(name: 'text') this.text, @required @JsonKey(name: 'markup') this.markup})
       : assert(markup != null);
 
-  factory _$_MockMessage.fromJson(Map<String, dynamic> json) =>
-      _$_$_MockMessageFromJson(json);
+  factory _$_MockMessage.fromJson(Map<String, dynamic> json) => _$_$_MockMessageFromJson(json);
 
   @override
   @JsonKey(name: 'text')
@@ -139,21 +125,16 @@ class _$_MockMessage implements _MockMessage {
   bool operator ==(dynamic other) {
     return identical(this, other) ||
         (other is _MockMessage &&
-            (identical(other.text, text) ||
-                const DeepCollectionEquality().equals(other.text, text)) &&
-            (identical(other.markup, markup) ||
-                const DeepCollectionEquality().equals(other.markup, markup)));
+            (identical(other.text, text) || const DeepCollectionEquality().equals(other.text, text)) &&
+            (identical(other.markup, markup) || const DeepCollectionEquality().equals(other.markup, markup)));
   }
 
   @override
   int get hashCode =>
-      runtimeType.hashCode ^
-      const DeepCollectionEquality().hash(text) ^
-      const DeepCollectionEquality().hash(markup);
+      runtimeType.hashCode ^ const DeepCollectionEquality().hash(text) ^ const DeepCollectionEquality().hash(markup);
 
   @override
-  _$MockMessageCopyWith<_MockMessage> get copyWith =>
-      __$MockMessageCopyWithImpl<_MockMessage>(this, _$identity);
+  _$MockMessageCopyWith<_MockMessage> get copyWith => __$MockMessageCopyWithImpl<_MockMessage>(this, _$identity);
 
   @override
   Map<String, dynamic> toJson() {
@@ -163,12 +144,10 @@ class _$_MockMessage implements _MockMessage {
 
 abstract class _MockMessage implements MockMessage {
   const factory _MockMessage(
-          {@JsonKey(name: 'text') String text,
-          @required @JsonKey(name: 'markup') List<MarkupEntity> markup}) =
-      _$_MockMessage;
+      {@JsonKey(name: 'text') String text,
+      @required @JsonKey(name: 'markup') List<MarkupEntity> markup}) = _$_MockMessage;
 
-  factory _MockMessage.fromJson(Map<String, dynamic> json) =
-      _$_MockMessage.fromJson;
+  factory _MockMessage.fromJson(Map<String, dynamic> json) = _$_MockMessage.fromJson;
 
   @override
   @JsonKey(name: 'text')
diff --git a/test/test_utils/mocks/mock_message.g.dart b/test/test_utils/mocks/mock_message.g.dart
index 1d3031f6..7590454f 100644
--- a/test/test_utils/mocks/mock_message.g.dart
+++ b/test/test_utils/mocks/mock_message.g.dart
@@ -10,14 +10,12 @@ _$_MockMessage _$_$_MockMessageFromJson(Map<String, dynamic> json) {
   return _$_MockMessage(
     text: json['text'] as String,
     markup: (json['markup'] as List)
-        ?.map((e) =>
-            e == null ? null : MarkupEntity.fromJson(e as Map<String, dynamic>))
+        ?.map((e) => e == null ? null : MarkupEntity.fromJson(e as Map<String, dynamic>))
         ?.toList(),
   );
 }
 
-Map<String, dynamic> _$_$_MockMessageToJson(_$_MockMessage instance) =>
-    <String, dynamic>{
+Map<String, dynamic> _$_$_MockMessageToJson(_$_MockMessage instance) => <String, dynamic>{
       'text': instance.text,
       'markup': instance.markup?.map((e) => e?.toJson())?.toList(),
     };