This unfurled media item is unique in that it only support attachment references using the attachment://<filename> syntax
Optionalid32 bit integer used as an optional identifier for component
The id field is optional and is used to identify components in the response from an interaction that aren't interactive components. The id must be unique within the message and is generated sequentially if left empty. Generation of ids won't use another id that exists in the message if you have one defined for another component.
OptionalspoilerWhether the media should be a spoiler (or blurred out)
The type of the component
A File is a top-level component that allows you to display an uploaded file as an attachment to the message and reference it in the component.
Each file component can only display 1 attached file, but you can upload multiple files and add them to different file components within your payload.
Files are only available in messages.
See
https://discord.com/developers/docs/components/reference#file