feat: add connection hash

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();
       }
@@ -87,24 +87,24 @@ 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 {
         final completer = Completer<String>();
 
         var checkedEndpoints = 0;
 
-        for (final e in _settings.endpoints) {
+        for (final e in settings.endpoints) {
           _checkLatency(e).whenComplete(() {
             checkedEndpoints++;
           }).then((v) {

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',
         },

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',
         },

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;
   }
 

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;
   }
 

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;
   }
 

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);
 

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();

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