Specifies options that will be used to generate the link preview for the caption, or even a standalone link preview without an attached message.
{schema}
| Name | Type | Description |
|---|---|---|
| flags | # | Flags, see TL conditional fields |
| force_large_media | flags.0?true | If set, specifies that a large media preview should be used. |
| force_small_media | flags.1?true | If set, specifies that a small media preview should be used. |
| optional | flags.2?true | If not set, a WEBPAGE_NOT_FOUND RPC error will be emitted if a webpage preview cannot be generated for the specified url; otherwise, no error will be emitted (unless the provided message is also empty, in which case a MESSAGE_EMPTY will be emitted, instead). |
| url | string | The URL to use for the link preview. |