| Name | Type | Description | Notes |
|---|---|---|---|
| download_url | string | The URL at which to download the chat file. | [optional] |
| file_id | string | The chat file's unique ID. | [optional] |
| file_name | string | The chat file's name and its file extension. | [optional] |
| file_size | int | The chat file's size, in bytes. | [optional] |