code: func (c *Context) SendAction(s string) error {
  	_, err := c.Bot().API.Send(tg.NewChatAction(c.Chat.ID, s))
  	return err
  }
docs: // SendAction send the one of "typing", "upload_photo", "record_video", "upload_video", "record_audio", "upload_audio", "upload_document", "find_location"