code: def fetchImageUrl(self, image_id):
          
          image_id = str(image_id)
          data = {"photo_id": str(image_id)}
          j = self._get(
              ReqUrl.ATTACHMENT_PHOTO, query=data, fix_request=True, as_json=True
          )
  
          url = get_jsmods_require(j, 3)
          if url is None:
              raise FBchatException("Could not fetch image url from: {}".format(j))
          return url
docs: Fetches the url to the original image from an image attachment ID
  
          :param image_id: The image you want to fethc
          :type image_id: str
          :return: An url where you can download the original image
          :rtype: str
          :raises: FBchatException if request failed