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44 lines
1.9 KiB
Markdown
44 lines
1.9 KiB
Markdown
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NIP-19
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======
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bech32-encoded entities
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-----------------------
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`draft` `optional` `author:jb55` `author:fiatjaf` `author:Semisol`
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This NIP specifies all bech32-encoded entities.
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## Bare keys and ids
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To prevent confusion and mixing between private keys, public keys and event ids, which are all 32 byte strings. bech32-(not-m) encoding with different prefixes can be used for each of these entities.
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These are the possible bech32 prefixes:
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- `npub`: public keys
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- `nsec`: private keys
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- `note`: note ids
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Example: the hex public key `3bf0c63fcb93463407af97a5e5ee64fa883d107ef9e558472c4eb9aaaefa459d` translates to `npub180cvv07tjdrrgpa0j7j7tmnyl2yr6yr7l8j4s3evf6u64th6gkwsyjh6w6`.
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The bech32 encodings of keys and ids are not meant to be used inside the standard NIP-01 event formats or inside the filters, they're meant for human-friendlier display and input only. Clients should still accept keys in both hex and npubformat for now, and convert internally.
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## Shareable identifiers with extra metadata
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When sharing a profile or an event, an app may decide to include relay information and other metadata such that other apps can locate and display these entities more easily.
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For these events, the contents are a binary-encoded list of `TLV` (type-length-value), with `T` and `L` being 1 byte each (`uint8`, i.e. a number in the range of 0-255), and `V` being a sequence of bytes of the size indicated by `L`.
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These are the possible bech32 prefixes with `TLV`:
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- `nprofile`: a nostr profile
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- `nevent`: a nostr event
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These possible standardized `TLV` types are indicated here:
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- `0`: `special`
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- depends on the bech32 prefix:
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- for `nprofile` it will be the 32 bytes of the profile public key
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- for `nevent` it will be the 32 bytes of the event id
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- `1`: `relay`
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- A relay in which the entity (profile or event) is more likely to be found, encoded as UTF-8. This may be included multiple times.
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