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60 lines
2.0 KiB
Markdown
60 lines
2.0 KiB
Markdown
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NIP-48
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======
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Proxy Tags
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----------
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`draft` `optional` `author:alexgleason`
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Nostr events bridged from other protocols such as ActivityPub can link back to the source object by including a `"proxy"` tag, in the form:
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```
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["proxy", <id>, <protocol>]
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```
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Where:
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- `<id>` is the ID of the source object. The ID format varies depending on the protocol. The ID must be universally unique, regardless of the protocol.
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- `<protocol>` is the name of the protocol, e.g. `"activitypub"`.
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Clients may use this information to reconcile duplicated content bridged from other protocols, or to display a link to the source object.
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Proxy tags may be added to any event kind, and doing so indicates that the event did not originate on the Nostr protocol, and instead originated elsewhere on the web.
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### Supported protocols
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This list may be extended in the future.
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| Protocol | ID format | Example |
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| -------- | --------- | ------- |
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| `activitypub` | URL | `https://gleasonator.com/objects/9f524868-c1a0-4ee7-ad51-aaa23d68b526` |
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| `atproto` | AT URI | `at://did:plc:zhbjlbmir5dganqhueg7y4i3/app.bsky.feed.post/3jt5hlibeol2i` |
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| `rss` | URL with guid fragment | `https://soapbox.pub/rss/feed.xml#https%3A%2F%2Fsoapbox.pub%2Fblog%2Fmostr-fediverse-nostr-bridge` |
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| `web` | URL | `https://twitter.com/jack/status/20` |
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### Examples
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ActivityPub object:
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```json
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{
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"kind": 1,
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"content": "I'm vegan btw",
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"tags": [
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[
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"proxy",
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"https://gleasonator.com/objects/8f6fac53-4f66-4c6e-ac7d-92e5e78c3e79",
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"activitypub"
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]
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],
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"pubkey": "79c2cae114ea28a981e7559b4fe7854a473521a8d22a66bbab9fa248eb820ff6",
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"created_at": 1691091365,
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"id": "55920b758b9c7b17854b6e3d44e6a02a83d1cb49e1227e75a30426dea94d4cb2",
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"sig": "a72f12c08f18e85d98fb92ae89e2fe63e48b8864c5e10fbdd5335f3c9f936397a6b0a7350efe251f8168b1601d7012d4a6d0ee6eec958067cf22a14f5a5ea579"
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}
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```
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### See also
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- [FEP-fffd: Proxy Objects](https://codeberg.org/fediverse/fep/src/branch/main/fep/fffd/fep-fffd.md)
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- [Mostr bridge](https://mostr.pub/)
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