text: #!/usr/bin/env python
  
  import asyncio
  import logging
  from typing import (
      Optional
  )
  from hummingbot.core.data_type.user_stream_tracker_data_source import UserStreamTrackerDataSource
  from hummingbot.logger import HummingbotLogger
  from hummingbot.core.data_type.user_stream_tracker import UserStreamTracker
  from hummingbot.core.utils.async_utils import (
      safe_ensure_future,
      safe_gather,
  )
  from .openware_api_user_stream_data_source import OpenwareAPIUserStreamDataSource
  #from openware.client import Client as OpenwareClient
  from hummingbot.connector.exchange.openware.lib.client import Client as OpenwareClient
  
  class OpenwareUserStreamTracker(UserStreamTracker):
      _bust_logger: Optional[HummingbotLogger] = None
  
      @classmethod
      def logger(cls) -> HummingbotLogger:
          if cls._bust_logger is None:
              cls._bust_logger = logging.getLogger(__name__)
          return cls._bust_logger
  
      def __init__(self, openware_client: Optional[OpenwareClient] = None, domain: str = "com"):
          super().__init__()
          self._openware_client: OpenwareClient = openware_client
          self._ev_loop: asyncio.events.AbstractEventLoop = asyncio.get_event_loop()
          self._data_source: Optional[UserStreamTrackerDataSource] = None
          self._user_stream_tracking_task: Optional[asyncio.Task] = None
          self._domain = domain
  
      @property
      def data_source(self) -> UserStreamTrackerDataSource:
          if not self._data_source:
              self._data_source = OpenwareAPIUserStreamDataSource(openware_client=self._openware_client, domain=self._domain)
          return self._data_source
  
      @property
      def exchange_name(self) -> str:
          if self._domain == "com":
              return "openware"
          else:
              return f"openware_{self._domain}"
  
      async def start(self):
          self._user_stream_tracking_task = safe_ensure_future(
              self.data_source.listen_for_user_stream(self._ev_loop, self._user_stream)
          )
          await safe_gather(self._user_stream_tracking_task)
  