class PacketException implements Exception {
  final String message;
  final String? code;

  PacketException(this.message, {this.code});

  @override
  String toString() => 'PacketException: $message';
}

class NetworkException extends PacketException {
  NetworkException(super.message, {super.code});
}

class HashExistsException extends PacketException {
  HashExistsException() : super('Hash already exists', code: 'hash_exists');
}

class QueueFullException extends PacketException {
  QueueFullException() : super('Queue is full (max 20)', code: 'queue_full');
}

class DatabaseException extends PacketException {
  DatabaseException(super.message, {super.code});
}