руки переломаю

lib/core/protocol/packet.dart

@@ -190,6 +190,7 @@ Uint8List _lz4BlockDecompress(Uint8List src, int maxSize) {
 
     if (pos >= src.length) break;
 
+    if (pos + 1 >= src.length) throw StateError('LZ4: unexpected end of input');
     final offset = src[pos] | (src[pos + 1] << 8);
     pos += 2;
     if (offset == 0) throw StateError('LZ4: offset = 0');

lib/core/storage/app_database.dart

@@ -1,3 +1,4 @@
+import 'dart:async';
 import 'dart:io';
 
 import 'package:komet/core/utils/logger.dart';
@@ -72,10 +73,15 @@ class ProfileData {
     final profileOptionsStr = row['profile_options'] as String?;
     List<int>? profileOptions;
     if (profileOptionsStr != null && profileOptionsStr.isNotEmpty) {
-      profileOptions = profileOptionsStr
-          .split(',')
-          .map((e) => int.parse(e.trim()))
-          .toList();
+      try {
+        profileOptions = profileOptionsStr
+            .split(',')
+            .where((e) => e.trim().isNotEmpty)
+            .map((e) => int.parse(e.trim()))
+            .toList();
+      } catch (_) {
+        profileOptions = null;
+      }
     }
     return ProfileData(
       id: row['id'] as int,
@@ -130,8 +136,20 @@ class AppDatabase {
     }
   }
 
+  static Completer<Database>? _initCompleter;
+
   static Future<Database> get _instance async {
-    _db ??= await _open();
+    if (_db != null) return _db!;
+    if (_initCompleter != null) return _initCompleter!.future;
+    _initCompleter = Completer<Database>();
+    try {
+      _db = await _open();
+      _initCompleter!.complete(_db!);
+    } catch (e) {
+      _initCompleter!.completeError(e);
+      _initCompleter = null;
+      rethrow;
+    }
     return _db!;
   }
 

lib/core/storage/token_storage.dart

@@ -33,7 +33,7 @@ class TokenStorage {
   static Future<String?> readActiveToken() async {
     final id = await getActiveAccountId();
     if (id == null) return null;
-    return readToken(id);
+    return await readToken(id);
   }
 
   static Future<void> deleteAccount(int accountId) async {

lib/core/transport/connection.dart

@@ -99,7 +99,9 @@ class Connection {
     if (socket != null) {
       try {
         socket.close();
-      } catch (_) {}
+      } catch (e) {
+        logger.w('Ошибка при закрытии сокета: $e');
+      }
     }
 
     _setState(SocketState.disconnected);

lib/core/transport/proxy_connector.dart

@@ -60,8 +60,8 @@ class ProxyConnector {
         if (!useAuth) {
           throw SocketException('SOCKS5: прокси требует аутентификацию');
         }
-        final usernameBytes = utf8.encode(settings.username!);
-        final passwordBytes = utf8.encode(settings.password!);
+        final usernameBytes = utf8.encode(settings.username ?? '');
+        final passwordBytes = utf8.encode(settings.password ?? '');
         final authPacket = BytesBuilder()
           ..addByte(0x01)
           ..addByte(usernameBytes.length)
@@ -175,7 +175,10 @@ class ProxyConnector {
       final responseStr = utf8.decode(headerBytes, allowMalformed: true);
       final statusLine = responseStr.split('\r\n').first;
       final parts = statusLine.split(' ');
-      final statusCode = parts.length >= 2 ? int.tryParse(parts[1]) ?? 0 : 0;
+      if (parts.length < 2) {
+        throw SocketException('HTTP CONNECT: некорректный ответ: $statusLine');
+      }
+      final statusCode = int.tryParse(parts[1]) ?? 0;
       if (statusCode != 200) {
         throw SocketException(
           'HTTP CONNECT: прокси вернул статус $statusCode',
@@ -201,10 +204,17 @@ class ProxyConnector {
     RawSocket proxySocket,
     _RawSocketIO io,
   ) async {
-    final server = await RawServerSocket.bind(
-      InternetAddress.loopbackIPv4,
-      0,
-    );
+    RawServerSocket? server;
+    try {
+      server = await RawServerSocket.bind(
+        InternetAddress.loopbackIPv4,
+        0,
+      );
+    } catch (e) {
+      io.dispose();
+      proxySocket.close();
+      rethrow;
+    }
     final clientSide = await RawSocket.connect(
       InternetAddress.loopbackIPv4,
       server.port,

lib/core/transport/sender.dart

@@ -8,7 +8,7 @@ class PacketSender {
   int get currentSeq => _seq;
 
   int _nextSeq() {
-    _seq = (_seq + 1) % 256;
+    _seq = (_seq + 1) % 65536;
     return _seq;
   }