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44 lines
1.4 KiB
Markdown
44 lines
1.4 KiB
Markdown
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NIP029
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======
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imeta
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--------------
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`imeta` is a tag for adding media attachments to events. `imeta` tags MUST match URLs
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in the event content. Clients may replace imeta URLs with rich previews. `imeta` tags
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contain extra information about the media attachment, which clients can use to provide
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a better experience when loading images.
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The `imeta` tag is variadic, and each entry is a space-delimited key/value pair.
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Each `imeta` tag MUST have a `url`, and at least one other field. `imeta` may include
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any field specified by [NIP 94](./94.md). There SHOULD be only one `imeta` tag per url.
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## Example
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```json
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{
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"content": "More image metadata tests don’t mind me https://nostr.build/i/my-image.jpg",
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"kind": 1,
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"tags": [
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[
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"imeta",
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"url https://nostr.build/i/my-image.jpg",
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"blurhash eVF$^OI:${M{o#*0-nNFxakD-?xVM}WEWB%iNKxvR-oetmo#R-aen$",
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"dim 3024x4032",
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"alt A scenic photo overlooking the coast of Costa Rica",
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"x <sha256 hash as specified in NIP 94>",
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"fallback https://nostrcheck.me/alt1.jpg"
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"fallback https://void.cat/alt1.jpg"
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]
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]
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}
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```
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## Recommended client behavior
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When uploading images during a new post, clients MAY include this metadata
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after the image is uploaded and included in the post.
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When pasting urls during post composition, the client MAY download the image
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and add this metadata before the post is sent.
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