diff --git a/packages/flutter_nekoton_bridge/lib/example_related/caller_wrapper.reflectable.dart b/packages/flutter_nekoton_bridge/lib/example_related/caller_wrapper.reflectable.dart
index bb17e825..19992d82 100644
--- a/packages/flutter_nekoton_bridge/lib/example_related/caller_wrapper.reflectable.dart
+++ b/packages/flutter_nekoton_bridge/lib/example_related/caller_wrapper.reflectable.dart
@@ -141,6 +141,7 @@ final _data = <r.Reflectable, r.ReflectorData>{
               r'initializeMirror': 2,
               r'connection': 2,
               r'connection=': 1,
+              r'settings': 2,
               r'type': 2,
               r'name': 2,
               r'group': 2,
@@ -177,6 +178,7 @@ final _data = <r.Reflectable, r.ReflectorData>{
               r'initializeMirror': 2,
               r'connection': 2,
               r'connection=': 1,
+              r'settings': 2,
               r'type': 2,
               r'name': 2,
               r'group': 2,
@@ -213,6 +215,7 @@ final _data = <r.Reflectable, r.ReflectorData>{
               r'initializeMirror': 2,
               r'connection': 2,
               r'connection=': 1,
+              r'settings': 2,
               r'type': 2,
               r'name': 2,
               r'group': 2,
@@ -538,6 +541,7 @@ final _data = <r.Reflectable, r.ReflectorData>{
         r'request': (dynamic instance) => instance.request,
         r'post': (dynamic instance) => instance.post,
         r'connection': (dynamic instance) => instance.connection,
+        r'settings': (dynamic instance) => instance.settings,
         r'type': (dynamic instance) => instance.type,
         r'name': (dynamic instance) => instance.name,
         r'group': (dynamic instance) => instance.group,
diff --git a/packages/flutter_nekoton_bridge/lib/nekoton/core/generic_contract/generic_contract.reflectable.dart b/packages/flutter_nekoton_bridge/lib/nekoton/core/generic_contract/generic_contract.reflectable.dart
index 374354b6..12649f45 100644
--- a/packages/flutter_nekoton_bridge/lib/nekoton/core/generic_contract/generic_contract.reflectable.dart
+++ b/packages/flutter_nekoton_bridge/lib/nekoton/core/generic_contract/generic_contract.reflectable.dart
@@ -198,6 +198,7 @@ final _data = <r.Reflectable, r.ReflectorData>{
               r'initializeMirror': 0,
               r'connection': 0,
               r'connection=': 4,
+              r'settings': 0,
               r'type': 0,
               r'name': 0,
               r'group': 0,
@@ -234,6 +235,7 @@ final _data = <r.Reflectable, r.ReflectorData>{
               r'initializeMirror': 0,
               r'connection': 0,
               r'connection=': 4,
+              r'settings': 0,
               r'type': 0,
               r'name': 0,
               r'group': 0,
@@ -270,6 +272,7 @@ final _data = <r.Reflectable, r.ReflectorData>{
               r'initializeMirror': 0,
               r'connection': 0,
               r'connection=': 4,
+              r'settings': 0,
               r'type': 0,
               r'name': 0,
               r'group': 0,
@@ -574,6 +577,7 @@ final _data = <r.Reflectable, r.ReflectorData>{
         r'test1': (dynamic instance) => instance.test1,
         r'post': (dynamic instance) => instance.post,
         r'connection': (dynamic instance) => instance.connection,
+        r'settings': (dynamic instance) => instance.settings,
         r'type': (dynamic instance) => instance.type,
         r'name': (dynamic instance) => instance.name,
         r'group': (dynamic instance) => instance.group,
diff --git a/packages/flutter_nekoton_bridge/lib/nekoton/core/token_wallet/token_wallet.reflectable.dart b/packages/flutter_nekoton_bridge/lib/nekoton/core/token_wallet/token_wallet.reflectable.dart
index 470fdd5c..1e39758e 100644
--- a/packages/flutter_nekoton_bridge/lib/nekoton/core/token_wallet/token_wallet.reflectable.dart
+++ b/packages/flutter_nekoton_bridge/lib/nekoton/core/token_wallet/token_wallet.reflectable.dart
@@ -209,6 +209,7 @@ final _data = <r.Reflectable, r.ReflectorData>{
               r'initializeMirror': 0,
               r'connection': 0,
               r'connection=': 5,
+              r'settings': 0,
               r'type': 0,
               r'name': 0,
               r'group': 0,
@@ -245,6 +246,7 @@ final _data = <r.Reflectable, r.ReflectorData>{
               r'initializeMirror': 0,
               r'connection': 0,
               r'connection=': 5,
+              r'settings': 0,
               r'type': 0,
               r'name': 0,
               r'group': 0,
@@ -281,6 +283,7 @@ final _data = <r.Reflectable, r.ReflectorData>{
               r'initializeMirror': 0,
               r'connection': 0,
               r'connection=': 5,
+              r'settings': 0,
               r'type': 0,
               r'name': 0,
               r'group': 0,
@@ -568,6 +571,7 @@ final _data = <r.Reflectable, r.ReflectorData>{
         r'test1': (dynamic instance) => instance.test1,
         r'post': (dynamic instance) => instance.post,
         r'connection': (dynamic instance) => instance.connection,
+        r'settings': (dynamic instance) => instance.settings,
         r'type': (dynamic instance) => instance.type,
         r'name': (dynamic instance) => instance.name,
         r'group': (dynamic instance) => instance.group,
diff --git a/packages/flutter_nekoton_bridge/lib/nekoton/core/ton_wallet/ton_wallet.reflectable.dart b/packages/flutter_nekoton_bridge/lib/nekoton/core/ton_wallet/ton_wallet.reflectable.dart
index 67c6586a..bce9e5d8 100644
--- a/packages/flutter_nekoton_bridge/lib/nekoton/core/ton_wallet/ton_wallet.reflectable.dart
+++ b/packages/flutter_nekoton_bridge/lib/nekoton/core/ton_wallet/ton_wallet.reflectable.dart
@@ -229,6 +229,7 @@ final _data = <r.Reflectable, r.ReflectorData>{
               r'initializeMirror': 0,
               r'connection': 0,
               r'connection=': 11,
+              r'settings': 0,
               r'type': 0,
               r'name': 0,
               r'group': 0,
@@ -265,6 +266,7 @@ final _data = <r.Reflectable, r.ReflectorData>{
               r'initializeMirror': 0,
               r'connection': 0,
               r'connection=': 11,
+              r'settings': 0,
               r'type': 0,
               r'name': 0,
               r'group': 0,
@@ -301,6 +303,7 @@ final _data = <r.Reflectable, r.ReflectorData>{
               r'initializeMirror': 0,
               r'connection': 0,
               r'connection=': 11,
+              r'settings': 0,
               r'type': 0,
               r'name': 0,
               r'group': 0,
@@ -587,6 +590,7 @@ final _data = <r.Reflectable, r.ReflectorData>{
         r'test1': (dynamic instance) => instance.test1,
         r'post': (dynamic instance) => instance.post,
         r'connection': (dynamic instance) => instance.connection,
+        r'settings': (dynamic instance) => instance.settings,
         r'type': (dynamic instance) => instance.type,
         r'name': (dynamic instance) => instance.name,
         r'group': (dynamic instance) => instance.group,
diff --git a/packages/flutter_nekoton_bridge/lib/nekoton/external/gql_connection.dart b/packages/flutter_nekoton_bridge/lib/nekoton/external/gql_connection.dart
index 1a0102e7..898037df 100644
--- a/packages/flutter_nekoton_bridge/lib/nekoton/external/gql_connection.dart
+++ b/packages/flutter_nekoton_bridge/lib/nekoton/external/gql_connection.dart
@@ -24,7 +24,7 @@ class GqlConnection extends RustToDartMirrorInterface {
 
   final String _name;
   final String _group;
-  final GqlNetworkSettings _settings;
+  final GqlNetworkSettings settings;
 
   final type = TransportType.gql;
 
@@ -33,7 +33,7 @@ class GqlConnection extends RustToDartMirrorInterface {
   GqlConnection._(
     this._post,
     this._get,
-    this._settings,
+    this.settings,
     this._name,
     this._group,
   );
@@ -65,8 +65,8 @@ class GqlConnection extends RustToDartMirrorInterface {
     try {
       String endpoint;
 
-      if (_settings.endpoints.length == 1) {
-        endpoint = _settings.endpoints.first;
+      if (settings.endpoints.length == 1) {
+        endpoint = settings.endpoints.first;
       } else {
         endpoint = await _getEndpoint();
       }
@@ -87,16 +87,16 @@ class GqlConnection extends RustToDartMirrorInterface {
     if (_cachedEndpoint != null) return _cachedEndpoint!;
 
     _cachedEndpoint = await _selectQueryingEndpoint().timeout(
-      Duration(milliseconds: _settings.latencyDetectionInterval),
+      Duration(milliseconds: settings.latencyDetectionInterval),
       onTimeout: () => throw ErrorCode.Network,
     );
     return _cachedEndpoint!;
   }
 
   Future<String> _selectQueryingEndpoint() async {
-    final maxLatency = _settings.maxLatency;
-    final retryCount = _settings.endpointSelectionRetryCount;
-    final endpointsCount = _settings.endpoints.length;
+    final maxLatency = settings.maxLatency;
+    final retryCount = settings.endpointSelectionRetryCount;
+    final endpointsCount = settings.endpoints.length;
 
     for (var i = 0; i < retryCount; i++) {
       try {
@@ -104,7 +104,7 @@ class GqlConnection extends RustToDartMirrorInterface {
 
         var checkedEndpoints = 0;
 
-        for (final e in _settings.endpoints) {
+        for (final e in settings.endpoints) {
           _checkLatency(e).whenComplete(() {
             checkedEndpoints++;
           }).then((v) {
diff --git a/packages/flutter_nekoton_bridge/lib/nekoton/external/gql_connection.reflectable.dart b/packages/flutter_nekoton_bridge/lib/nekoton/external/gql_connection.reflectable.dart
index 2a820d67..5be132af 100644
--- a/packages/flutter_nekoton_bridge/lib/nekoton/external/gql_connection.reflectable.dart
+++ b/packages/flutter_nekoton_bridge/lib/nekoton/external/gql_connection.reflectable.dart
@@ -70,6 +70,7 @@ final _data = <r.Reflectable, r.ReflectorData>{
               r'initializeMirror': 0,
               r'connection': 0,
               r'connection=': 1,
+              r'settings': 0,
               r'type': 0,
               r'name': 0,
               r'group': 0,
@@ -177,6 +178,7 @@ final _data = <r.Reflectable, r.ReflectorData>{
               r'initializeMirror': 0,
               r'connection': 0,
               r'connection=': 1,
+              r'settings': 0,
               r'type': 0,
               r'name': 0,
               r'group': 0,
@@ -213,6 +215,7 @@ final _data = <r.Reflectable, r.ReflectorData>{
               r'initializeMirror': 0,
               r'connection': 0,
               r'connection=': 1,
+              r'settings': 0,
               r'type': 0,
               r'name': 0,
               r'group': 0,
@@ -531,6 +534,7 @@ final _data = <r.Reflectable, r.ReflectorData>{
         r'post': (dynamic instance) => instance.post,
         r'initializeMirror': (dynamic instance) => instance.initializeMirror,
         r'connection': (dynamic instance) => instance.connection,
+        r'settings': (dynamic instance) => instance.settings,
         r'type': (dynamic instance) => instance.type,
         r'name': (dynamic instance) => instance.name,
         r'group': (dynamic instance) => instance.group,
diff --git a/packages/flutter_nekoton_bridge/lib/nekoton/external/jrpc_connection.dart b/packages/flutter_nekoton_bridge/lib/nekoton/external/jrpc_connection.dart
index 3105d875..bd9b564a 100644
--- a/packages/flutter_nekoton_bridge/lib/nekoton/external/jrpc_connection.dart
+++ b/packages/flutter_nekoton_bridge/lib/nekoton/external/jrpc_connection.dart
@@ -18,13 +18,13 @@ class JrpcConnection extends RustToDartMirrorInterface {
 
   final String _name;
   final String _group;
-  final JrpcNetworkSettings _settings;
+  final JrpcNetworkSettings settings;
 
   final type = TransportType.gql;
 
   JrpcConnection._(
     this._post,
-    this._settings,
+    this.settings,
     this._name,
     this._group,
   );
@@ -53,7 +53,7 @@ class JrpcConnection extends RustToDartMirrorInterface {
   Future<String> post(String requestData) async {
     try {
       return await _post(
-        endpoint: _settings.endpoint,
+        endpoint: settings.endpoint,
         headers: {
           'Content-Type': 'application/json',
         },
diff --git a/packages/flutter_nekoton_bridge/lib/nekoton/external/jrpc_connection.reflectable.dart b/packages/flutter_nekoton_bridge/lib/nekoton/external/jrpc_connection.reflectable.dart
index 23a99c14..91da14e1 100644
--- a/packages/flutter_nekoton_bridge/lib/nekoton/external/jrpc_connection.reflectable.dart
+++ b/packages/flutter_nekoton_bridge/lib/nekoton/external/jrpc_connection.reflectable.dart
@@ -70,6 +70,7 @@ final _data = <r.Reflectable, r.ReflectorData>{
               r'initializeMirror': 0,
               r'connection': 0,
               r'connection=': 1,
+              r'settings': 0,
               r'type': 0,
               r'name': 0,
               r'group': 0,
@@ -177,6 +178,7 @@ final _data = <r.Reflectable, r.ReflectorData>{
               r'initializeMirror': 0,
               r'connection': 0,
               r'connection=': 1,
+              r'settings': 0,
               r'type': 0,
               r'name': 0,
               r'group': 0,
@@ -213,6 +215,7 @@ final _data = <r.Reflectable, r.ReflectorData>{
               r'initializeMirror': 0,
               r'connection': 0,
               r'connection=': 1,
+              r'settings': 0,
               r'type': 0,
               r'name': 0,
               r'group': 0,
@@ -531,6 +534,7 @@ final _data = <r.Reflectable, r.ReflectorData>{
         r'post': (dynamic instance) => instance.post,
         r'initializeMirror': (dynamic instance) => instance.initializeMirror,
         r'connection': (dynamic instance) => instance.connection,
+        r'settings': (dynamic instance) => instance.settings,
         r'type': (dynamic instance) => instance.type,
         r'name': (dynamic instance) => instance.name,
         r'group': (dynamic instance) => instance.group,
diff --git a/packages/flutter_nekoton_bridge/lib/nekoton/external/ledger_connection.reflectable.dart b/packages/flutter_nekoton_bridge/lib/nekoton/external/ledger_connection.reflectable.dart
index 553c37a0..e6e35884 100644
--- a/packages/flutter_nekoton_bridge/lib/nekoton/external/ledger_connection.reflectable.dart
+++ b/packages/flutter_nekoton_bridge/lib/nekoton/external/ledger_connection.reflectable.dart
@@ -174,6 +174,7 @@ final _data = <r.Reflectable, r.ReflectorData>{
               r'initializeMirror': 0,
               r'connection': 0,
               r'connection=': 1,
+              r'settings': 0,
               r'type': 0,
               r'name': 0,
               r'group': 0,
@@ -210,6 +211,7 @@ final _data = <r.Reflectable, r.ReflectorData>{
               r'initializeMirror': 0,
               r'connection': 0,
               r'connection=': 1,
+              r'settings': 0,
               r'type': 0,
               r'name': 0,
               r'group': 0,
@@ -246,6 +248,7 @@ final _data = <r.Reflectable, r.ReflectorData>{
               r'initializeMirror': 0,
               r'connection': 0,
               r'connection=': 1,
+              r'settings': 0,
               r'type': 0,
               r'name': 0,
               r'group': 0,
@@ -539,6 +542,7 @@ final _data = <r.Reflectable, r.ReflectorData>{
         r'test0': (dynamic instance) => instance.test0,
         r'test1': (dynamic instance) => instance.test1,
         r'post': (dynamic instance) => instance.post,
+        r'settings': (dynamic instance) => instance.settings,
         r'type': (dynamic instance) => instance.type,
         r'name': (dynamic instance) => instance.name,
         r'group': (dynamic instance) => instance.group,
diff --git a/packages/flutter_nekoton_bridge/lib/nekoton/external/proto_connection.dart b/packages/flutter_nekoton_bridge/lib/nekoton/external/proto_connection.dart
index 85dc55aa..de40a61b 100644
--- a/packages/flutter_nekoton_bridge/lib/nekoton/external/proto_connection.dart
+++ b/packages/flutter_nekoton_bridge/lib/nekoton/external/proto_connection.dart
@@ -21,13 +21,13 @@ class ProtoConnection extends RustToDartMirrorInterface {
 
   final String _name;
   final String _group;
-  final ProtoNetworkSettings _settings;
+  final ProtoNetworkSettings settings;
 
   final type = TransportType.proto;
 
   ProtoConnection._(
     this._post,
-    this._settings,
+    this.settings,
     this._name,
     this._group,
   );
@@ -56,7 +56,7 @@ class ProtoConnection extends RustToDartMirrorInterface {
   Future<Uint8List> post(Uint8List requestData) async {
     try {
       return await _post(
-        endpoint: _settings.endpoint,
+        endpoint: settings.endpoint,
         headers: {
           'Content-Type': 'x-protobuf',
         },
diff --git a/packages/flutter_nekoton_bridge/lib/nekoton/external/proto_connection.reflectable.dart b/packages/flutter_nekoton_bridge/lib/nekoton/external/proto_connection.reflectable.dart
index 264af2ee..9e913915 100644
--- a/packages/flutter_nekoton_bridge/lib/nekoton/external/proto_connection.reflectable.dart
+++ b/packages/flutter_nekoton_bridge/lib/nekoton/external/proto_connection.reflectable.dart
@@ -70,6 +70,7 @@ final _data = <r.Reflectable, r.ReflectorData>{
               r'initializeMirror': 0,
               r'connection': 0,
               r'connection=': 1,
+              r'settings': 0,
               r'type': 0,
               r'name': 0,
               r'group': 0,
@@ -177,6 +178,7 @@ final _data = <r.Reflectable, r.ReflectorData>{
               r'initializeMirror': 0,
               r'connection': 0,
               r'connection=': 1,
+              r'settings': 0,
               r'type': 0,
               r'name': 0,
               r'group': 0,
@@ -213,6 +215,7 @@ final _data = <r.Reflectable, r.ReflectorData>{
               r'initializeMirror': 0,
               r'connection': 0,
               r'connection=': 1,
+              r'settings': 0,
               r'type': 0,
               r'name': 0,
               r'group': 0,
@@ -531,6 +534,7 @@ final _data = <r.Reflectable, r.ReflectorData>{
         r'post': (dynamic instance) => instance.post,
         r'initializeMirror': (dynamic instance) => instance.initializeMirror,
         r'connection': (dynamic instance) => instance.connection,
+        r'settings': (dynamic instance) => instance.settings,
         r'type': (dynamic instance) => instance.type,
         r'name': (dynamic instance) => instance.name,
         r'group': (dynamic instance) => instance.group,
diff --git a/packages/flutter_nekoton_bridge/lib/nekoton/external/storage.reflectable.dart b/packages/flutter_nekoton_bridge/lib/nekoton/external/storage.reflectable.dart
index 8d0c8cdc..4bb120b2 100644
--- a/packages/flutter_nekoton_bridge/lib/nekoton/external/storage.reflectable.dart
+++ b/packages/flutter_nekoton_bridge/lib/nekoton/external/storage.reflectable.dart
@@ -178,6 +178,7 @@ final _data = <r.Reflectable, r.ReflectorData>{
               r'initializeMirror': 0,
               r'connection': 0,
               r'connection=': 1,
+              r'settings': 0,
               r'type': 0,
               r'name': 0,
               r'group': 0,
@@ -214,6 +215,7 @@ final _data = <r.Reflectable, r.ReflectorData>{
               r'initializeMirror': 0,
               r'connection': 0,
               r'connection=': 1,
+              r'settings': 0,
               r'type': 0,
               r'name': 0,
               r'group': 0,
@@ -250,6 +252,7 @@ final _data = <r.Reflectable, r.ReflectorData>{
               r'initializeMirror': 0,
               r'connection': 0,
               r'connection=': 1,
+              r'settings': 0,
               r'type': 0,
               r'name': 0,
               r'group': 0,
@@ -544,6 +547,7 @@ final _data = <r.Reflectable, r.ReflectorData>{
         r'test1': (dynamic instance) => instance.test1,
         r'post': (dynamic instance) => instance.post,
         r'connection': (dynamic instance) => instance.connection,
+        r'settings': (dynamic instance) => instance.settings,
         r'type': (dynamic instance) => instance.type,
         r'name': (dynamic instance) => instance.name,
         r'group': (dynamic instance) => instance.group,
diff --git a/packages/flutter_nekoton_bridge/lib/nekoton/transport/gql_transport.dart b/packages/flutter_nekoton_bridge/lib/nekoton/transport/gql_transport.dart
index 91b758e3..46863447 100644
--- a/packages/flutter_nekoton_bridge/lib/nekoton/transport/gql_transport.dart
+++ b/packages/flutter_nekoton_bridge/lib/nekoton/transport/gql_transport.dart
@@ -21,6 +21,9 @@ class GqlTransport extends Transport {
 
     instance.networkId = await instance.getNetworkId();
 
+    instance.connectionParamsHash =
+        getHash('gql:${gqlConnection.settings.endpoints.join(',')}');
+
     return instance;
   }
 
diff --git a/packages/flutter_nekoton_bridge/lib/nekoton/transport/jrpc_transport.dart b/packages/flutter_nekoton_bridge/lib/nekoton/transport/jrpc_transport.dart
index bdeb984e..3b93a3ef 100644
--- a/packages/flutter_nekoton_bridge/lib/nekoton/transport/jrpc_transport.dart
+++ b/packages/flutter_nekoton_bridge/lib/nekoton/transport/jrpc_transport.dart
@@ -21,6 +21,9 @@ class JrpcTransport extends Transport {
 
     instance.networkId = await instance.getNetworkId();
 
+    instance.connectionParamsHash =
+        getHash('jrpc:${jrpcConnection.settings.endpoint}');
+
     return instance;
   }
 
diff --git a/packages/flutter_nekoton_bridge/lib/nekoton/transport/proto_transport.dart b/packages/flutter_nekoton_bridge/lib/nekoton/transport/proto_transport.dart
index d0a138ac..1edb76dc 100644
--- a/packages/flutter_nekoton_bridge/lib/nekoton/transport/proto_transport.dart
+++ b/packages/flutter_nekoton_bridge/lib/nekoton/transport/proto_transport.dart
@@ -21,6 +21,9 @@ class ProtoTransport extends Transport {
 
     instance.networkId = await instance.getNetworkId();
 
+    instance.connectionParamsHash =
+        getHash('proto:${protoConnection.settings.endpoint}');
+
     return instance;
   }
 
diff --git a/packages/flutter_nekoton_bridge/lib/nekoton/transport/transport.dart b/packages/flutter_nekoton_bridge/lib/nekoton/transport/transport.dart
index 8fd563d1..7b22f1c8 100644
--- a/packages/flutter_nekoton_bridge/lib/nekoton/transport/transport.dart
+++ b/packages/flutter_nekoton_bridge/lib/nekoton/transport/transport.dart
@@ -10,6 +10,9 @@ abstract class Transport {
 
   TransportType get type;
 
+  /// Get uniquer identifier of transport based on type and endpoints
+  late final String connectionParamsHash;
+
   /// Get contract state of address and return RawContractState or throw error
   Future<RawContractState> getContractState(Address address);
 
diff --git a/packages/flutter_nekoton_bridge/lib/nekoton/utils.dart b/packages/flutter_nekoton_bridge/lib/nekoton/utils.dart
index c48123c6..fce01c54 100644
--- a/packages/flutter_nekoton_bridge/lib/nekoton/utils.dart
+++ b/packages/flutter_nekoton_bridge/lib/nekoton/utils.dart
@@ -1,3 +1,4 @@
+import 'package:crypto/crypto.dart';
 import 'package:flutter_nekoton_bridge/flutter_nekoton_bridge.dart';
 import 'package:freezed_annotation/freezed_annotation.dart';
 
@@ -56,3 +57,6 @@ extension KeySignerName on KeySigner {
     );
   }
 }
+
+/// Get hash of String
+String getHash(String string) => sha256.convert(string.codeUnits).toString();
diff --git a/packages/flutter_nekoton_bridge/pubspec.yaml b/packages/flutter_nekoton_bridge/pubspec.yaml
index 4432dda1..856606e7 100644
--- a/packages/flutter_nekoton_bridge/pubspec.yaml
+++ b/packages/flutter_nekoton_bridge/pubspec.yaml
@@ -22,6 +22,7 @@ dependencies:
   #  for generating mirror hash
   uuid: ^3.0.7
   tuple: ^2.0.1
+  crypto: ^3.0.3
 dev_dependencies:
   ffi: ^2.0.2
   ffigen: ^8.0.2