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01.md
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@ -4,7 +4,7 @@ NIP-01
Basic protocol flow description Basic protocol flow description
------------------------------- -------------------------------
`draft` `mandatory` `author:fiatjaf` `author:distbit` `author:scsibug` `author:kukks` `author:jb55` `draft` `mandatory` `author:fiatjaf` `author:distbit` `author:scsibug` `author:kukks` `author:jb55` `author:semisol` `author:cameri` `author:Giszmo`
This NIP defines the basic protocol that should be implemented by everybody. New NIPs may add new optional (or mandatory) fields and messages and features to the structures and flows described here. This NIP defines the basic protocol that should be implemented by everybody. New NIPs may add new optional (or mandatory) fields and messages and features to the structures and flows described here.
@ -16,14 +16,13 @@ The only object type that exists is the `event`, which has the following format
```json ```json
{ {
"id": <32-bytes lowercase hex-encoded sha256 of the the serialized event data> "id": <32-bytes lowercase hex-encoded sha256 of the serialized event data>,
"pubkey": <32-bytes lowercase hex-encoded public key of the event creator>, "pubkey": <32-bytes lowercase hex-encoded public key of the event creator>,
"created_at": <unix timestamp in seconds>, "created_at": <unix timestamp in seconds>,
"kind": <integer>, "kind": <integer between 0 and 65535>,
"tags": [ "tags": [
["e", <32-bytes hex of the id of another event>, <recommended relay URL>], [<arbitrary string>...],
["p", <32-bytes hex of a pubkey>, <recommended relay URL>], ...
... // other kinds of tags may be included later
], ],
"content": <arbitrary string>, "content": <arbitrary string>,
"sig": <64-bytes hex of the signature of the sha256 hash of the serialized event data, which is the same as the "id" field> "sig": <64-bytes hex of the signature of the sha256 hash of the serialized event data, which is the same as the "id" field>
@ -43,9 +42,57 @@ To obtain the `event.id`, we `sha256` the serialized event. The serialization is
] ]
``` ```
### Tags
Each tag is an array of strings of arbitrary size, with some conventions around them. Take a look at the example below:
```json
{
...,
"tags": [
["e", "5c83da77af1dec6d7289834998ad7aafbd9e2191396d75ec3cc27f5a77226f36", "wss://nostr.example.com"],
["p", "f7234bd4c1394dda46d09f35bd384dd30cc552ad5541990f98844fb06676e9ca"],
["a", "30023:f7234bd4c1394dda46d09f35bd384dd30cc552ad5541990f98844fb06676e9ca:abcd", "wss://nostr.example.com"],
["alt", "reply"],
...
],
...
}
```
The first element of the tag array is referred to as the tag _name_ or _key_ and the second as the tag _value_. So we can safely say that the event above has an `e` tag set to `"5c83da77af1dec6d7289834998ad7aafbd9e2191396d75ec3cc27f5a77226f36"`, an `alt` tag set to `"reply"` and so on. All elements after the second do not have a conventional name.
This NIP defines 3 standard tags that can be used accross all event kinds with the same meaning. They are as follows:
- The `e` tag, used to refer to an event: `["e", <32-bytes hex of the id of another event>, <recommended relay URL, optional>]`
- The `p` tag, used to refer to another user: `["p", <32-bytes hex of a pubkey>, <recommended relay URL, optional>]`
- The `a` tag, used to refer to a parameterized replaceable event: `["a", <kind integer>:<32-bytes hex of a pubkey>:<d tag value>, <recommended relay URL, optional>]`
As a convention, all single-letter key tags are expected to be indexed by relays, such that it is possible, for example, to query or subscribe to events that reference the event `"5c83da77af1dec6d7289834998ad7aafbd9e2191396d75ec3cc27f5a77226f36"` by using the `{"#e": "5c83da77af1dec6d7289834998ad7aafbd9e2191396d75ec3cc27f5a77226f36"}` filter.
### Kinds
Kinds specify how clients should interpret the meaning of each event and the other fields of each event (e.g. an `"r"` tag may have a meaning in an event of kind 1 and an entirely different meaning in an event of kind 10002). Each NIP may define the meaning of a set of kinds that weren't defined elsewhere. This NIP defines two basic kinds:
- `0`: **metadata**: the `content` is set to a stringified JSON object `{name: <username>, about: <string>, picture: <url, string>}` describing the user who created the event. A relay may delete older events once it gets a new one for the same pubkey.
- `1`: **text note**: the `content` is set to the **plaintext** content of a note (anything the user wants to say). Content that must be parsed, such as Markdown and HTML, should not be used. Clients should also not parse content as those.
And also a convention for kind ranges that allow for easier experimentation and flexibility of relay implementation:
- for kind `n` such that `1000 <= n < 10000`, events are **regular**, which means they're all expected to be stored by relays.
- for kind `n` such that `10000 <= n < 20000`, events are **replaceable**, which means that, for each combination of `pubkey` and `kind`, only the latest event is expected to be stored by relays, older versions are expected to be discarded.
- for kind `n` such that `20000 <= n < 30000`, events are **ephemeral**, which means they are not expected to be stored by relays.
- for kind `n` such that `30000 <= n < 40000`, events are **parameterized replaceable**, which means that, for each combination of `pubkey`, `kind` and the `d` tag, only the latest event is expected to be stored by relays, older versions are expected to be discarded.
These are just conventions and relay implementations may differ.
## Communication between clients and relays ## Communication between clients and relays
Relays expose a websocket endpoint to which clients can connect. Relays expose a websocket endpoint to which clients can connect. Clients should open a single websocket connection to each relay and use it for all their subscriptions.
### Meaning of WebSocket status codes
- When a websocket is closed by the relay with a status code `4000` that means the client shouldn't try to connect again.
### From client to relay: sending events and creating subscriptions ### From client to relay: sending events and creating subscriptions
@ -55,56 +102,56 @@ Clients can send 3 types of messages, which must be JSON arrays, according to th
* `["REQ", <subscription_id>, <filters JSON>...]`, used to request events and subscribe to new updates. * `["REQ", <subscription_id>, <filters JSON>...]`, used to request events and subscribe to new updates.
* `["CLOSE", <subscription_id>]`, used to stop previous subscriptions. * `["CLOSE", <subscription_id>]`, used to stop previous subscriptions.
`<subscription_id>` is an arbitrary, non-empty string of max length 64 chars, that should be used to represent a subscription. `<subscription_id>` is an arbitrary, non-empty string of max length 64 chars, that should be used to represent a subscription. Relays should manage `<subscription_id>`s independently for each WebSocket connection; even if `<subscription_id>`s are the same string, they should be treated as different subscriptions for different connections.
`<filters>` is a JSON object that determines what events will be sent in that subscription, it can have the following attributes: `<filters>` is a JSON object that determines what events will be sent in that subscription, it can have the following attributes:
```json ```json
{ {
"ids": <a list of event ids or prefixes>, "ids": <a list of event ids>,
"authors": <a list of pubkeys or prefixes, the pubkey of an event must be one of these>, "authors": <a list of lowercase pubkeys, the pubkey of an event must be one of these>,
"kinds": <a list of a kind numbers>, "kinds": <a list of a kind numbers>,
"#e": <a list of event ids that are referenced in an "e" tag>, "#<single-letter>": <a list of event ids that are referenced in the tag specified by the single letter>,
"#p": <a list of pubkeys that are referenced in a "p" tag>, "since": <an integer unix timestamp in seconds, events must be newer than this to pass>,
"since": <an integer unix timestamp, events must be newer than this to pass>, "until": <an integer unix timestamp in seconds, events must be older than this to pass>,
"until": <an integer unix timestamp, events must be older than this to pass>,
"limit": <maximum number of events to be returned in the initial query> "limit": <maximum number of events to be returned in the initial query>
} }
``` ```
Upon receiving a `REQ` message, the relay SHOULD query its internal database and return events that match the filter, then store that filter and send again all future events it receives to that same websocket until the websocket is closed. The `CLOSE` event is received with the same `<subscription_id>` or a new `REQ` is sent using the same `<subscription_id>`, in which case it should overwrite the previous subscription. Upon receiving a `REQ` message, the relay SHOULD query its internal database and return events that match the filter, then store that filter and send again all future events it receives to that same websocket until the websocket is closed. The `CLOSE` event is received with the same `<subscription_id>` or a new `REQ` is sent using the same `<subscription_id>`, in which case it should overwrite the previous subscription.
Filter attributes containing lists (such as `ids`, `kinds`, or `#e`) are JSON arrays with one or more values. At least one of the array's values must match the relevant field in an event for the condition itself to be considered a match. For scalar event attributes such as `kind`, the attribute from the event must be contained in the filter list. For tag attributes such as `#e`, where an event may have multiple values, the event and filter condition values must have at least one item in common. Filter attributes containing lists (`ids`, `authors`, `kinds` and tag filters like `#e`) are JSON arrays with one or more values. At least one of the arrays' values must match the relevant field in an event for the condition to be considered a match. For scalar event attributes such as `authors` and `kind`, the attribute from the event must be contained in the filter list. In the case of tag attributes such as `#e`, for which an event may have multiple values, the event and filter condition values must have at least one item in common.
The `ids` and `authors` lists contain lowercase hexadecimal strings, which may either be an exact 64-character match, or a prefix of the event value. A prefix match is when the filter string is an exact string prefix of the event value. The use of prefixes allows for more compact filters where a large number of values are queried, and can provide some privacy for clients that may not want to disclose the exact authors or events they are searching for. The `ids`, `authors`, `#e` and `#p` filter lists MUST contain exact 64-character lowercase hex values.
The `since` and `until` properties can be used to specify the time range of events returned in the subscription. If a filter includes the `since` property, events with `created_at` greater than or equal to `since` are considered to match the filter. The `until` property is similar except that `created_at` must be less than or equal to `until`. In short, an event matches a filter if `since <= created_at <= until` holds.
All conditions of a filter that are specified must match for an event for it to pass the filter, i.e., multiple conditions are interpreted as `&&` conditions. All conditions of a filter that are specified must match for an event for it to pass the filter, i.e., multiple conditions are interpreted as `&&` conditions.
A `REQ` message may contain multiple filters. In this case, events that match any of the filters are to be returned, i.e., multiple filters are to be interpreted as `||` conditions. A `REQ` message may contain multiple filters. In this case, events that match any of the filters are to be returned, i.e., multiple filters are to be interpreted as `||` conditions.
The `limit` property of a filter is only valid for the initial query and can be ignored afterward. When `limit: n` is present it is assumed that the events returned in the initial query will be the latest `n` events. It is safe to return less events than `limit` specifies, but it is expected that relays do not return (much) more events than requested so clients don't get unnecessarily overwhelmed by data. The `limit` property of a filter is only valid for the initial query and MUST be ignored afterwards. When `limit: n` is present it is assumed that the events returned in the initial query will be the last `n` events ordered by the `created_at`. It is safe to return less events than `limit` specifies, but it is expected that relays do not return (much) more events than requested so clients don't get unnecessarily overwhelmed by data.
### From relay to client: sending events and notices ### From relay to client: sending events and notices
Relays can send 2 types of messages, which must also be JSON arrays, according to the following patterns: Relays can send 4 types of messages, which must also be JSON arrays, according to the following patterns:
* `["EVENT", <subscription_id>, <event JSON as defined above>]`, used to send events requested by clients. * `["EVENT", <subscription_id>, <event JSON as defined above>]`, used to send events requested by clients.
* `["OK", <event_id>, <true|false>, <message>]`, used to indicate acceptance or denial of an `EVENT` message.
* `["EOSE", <subscription_id>]`, used to indicate the _end of stored events_ and the beginning of events newly received in real-time.
* `["NOTICE", <message>]`, used to send human-readable error messages or other things to clients. * `["NOTICE", <message>]`, used to send human-readable error messages or other things to clients.
This NIP defines no rules for how `NOTICE` messages should be sent or treated. This NIP defines no rules for how `NOTICE` messages should be sent or treated.
`EVENT` messages MUST be sent only with a subscription ID related to a subscription previously initiated by the client (using the `REQ` message above). - `EVENT` messages MUST be sent only with a subscription ID related to a subscription previously initiated by the client (using the `REQ` message above).
- `OK` messages MUST be sent in response to `EVENT` messages received from clients, they must have the 3rd parameter set to `true` when an event has been accepted by the relay, `false` otherwise. The 4th parameter MAY be empty when the 3rd is `true`, otherwise it MUST be a string containing a machine-readable single-word prefix followed by a `:` and then a human-readable message. The standardized machine-readable prefixes are: `duplicate`, `pow`, `blocked`, `rate-limited`, `invalid`, and `error` for when none of that fits. Some examples:
## Basic Event Kinds * `["OK", "b1a649ebe8...", true, ""]`
* `["OK", "b1a649ebe8...", true, "pow: difficulty 25>=24"]`
- `0`: `set_metadata`: the `content` is set to a stringified JSON object `{name: <username>, about: <string>, picture: <url, string>}` describing the user who created the event. A relay may delete past `set_metadata` events once it gets a new one for the same pubkey. * `["OK", "b1a649ebe8...", true, "duplicate: already have this event"]`
- `1`: `text_note`: the `content` is set to the plaintext content of a note (anything the user wants to say). Markdown links (`[]()` stuff) are not plaintext. * `["OK", "b1a649ebe8...", false, "blocked: you are banned from posting here"]`
- `2`: `recommend_server`: the `content` is set to the URL (e.g., `wss://somerelay.com`) of a relay the event creator wants to recommend to its followers. * `["OK", "b1a649ebe8...", false, "blocked: please register your pubkey at https://my-expensive-relay.example.com"]`
* `["OK", "b1a649ebe8...", false, "rate-limited: slow down there chief"]`
A relay may choose to treat different message kinds differently, and it may or may not choose to have a default way to handle kinds it doesn't know about. * `["OK", "b1a649ebe8...", false, "invalid: event creation date is too far off from the current time. Is your system clock in sync?"]`
* `["OK", "b1a649ebe8...", false, "pow: difficulty 26 is less than 30"]`
## Other Notes: * `["OK", "b1a649ebe8...", false, "error: could not connect to the database"]`
- Clients should not open more than one websocket to each relay. One channel can support an unlimited number of subscriptions, so clients should do that.
- The `tags` array can store a tag identifier as the first element of each subarray, plus arbitrary information afterward (always as strings). This NIP defines `"p"` — meaning "pubkey", which points to a pubkey of someone that is referred to in the event —, and `"e"` — meaning "event", which points to the id of an event this event is quoting, replying to or referring to somehow.
- The `<recommended relay URL>` item present on the `"e"` and `"p"` tags is an optional (could be set to `""`) URL of a relay the client could attempt to connect to fetch the tagged event or other events from a tagged profile. It MAY be ignored, but it exists to increase censorship resistance and make the spread of relay addresses more seamless across clients.

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@ -47,3 +47,7 @@ let event = {
## Security Warning ## Security Warning
This standard does not go anywhere near what is considered the state-of-the-art in encrypted communication between peers, and it leaks metadata in the events, therefore it must not be used for anything you really need to keep secret, and only with relays that use `AUTH` to restrict who can fetch your `kind:4` events. This standard does not go anywhere near what is considered the state-of-the-art in encrypted communication between peers, and it leaks metadata in the events, therefore it must not be used for anything you really need to keep secret, and only with relays that use `AUTH` to restrict who can fetch your `kind:4` events.
## Client Implementation Warning
Clients *should not* search and replace public key or note references from the `.content`. If processed like a regular text note (where `@npub...` is replaced with `#[0]` with a `["p", "..."]` tag) the tags are leaked and the mentioned user will receive the message in their inbox.

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@ -6,7 +6,7 @@ Mapping Nostr keys to DNS-based internet identifiers
`final` `optional` `author:fiatjaf` `author:mikedilger` `final` `optional` `author:fiatjaf` `author:mikedilger`
On events of kind `0` (`set_metadata`) one can specify the key `"nip05"` with an [internet identifier](https://datatracker.ietf.org/doc/html/rfc5322#section-3.4.1) (an email-like address) as the value. Although there is a link to a very liberal "internet identifier" specification above, NIP-05 assumes the `<local-part>` part will be restricted to the characters `a-z0-9-_.`, case insensitive. On events of kind `0` (`set_metadata`) one can specify the key `"nip05"` with an [internet identifier](https://datatracker.ietf.org/doc/html/rfc5322#section-3.4.1) (an email-like address) as the value. Although there is a link to a very liberal "internet identifier" specification above, NIP-05 assumes the `<local-part>` part will be restricted to the characters `a-z0-9-_.`, case-insensitive.
Upon seeing that, the client splits the identifier into `<local-part>` and `<domain>` and use these values to make a GET request to `https://<domain>/.well-known/nostr.json?name=<local-part>`. Upon seeing that, the client splits the identifier into `<local-part>` and `<domain>` and use these values to make a GET request to `https://<domain>/.well-known/nostr.json?name=<local-part>`.
@ -50,7 +50,7 @@ or with the **optional** `"relays"` attribute:
If the pubkey matches the one given in `"names"` (as in the example above) that means the association is right and the `"nip05"` identifier is valid and can be displayed. If the pubkey matches the one given in `"names"` (as in the example above) that means the association is right and the `"nip05"` identifier is valid and can be displayed.
The optional `"relays"` attribute may contain an object with public keys as properties and arrays of relay URLs as values. When present, that can be used to help clients learn in which relays that user may be found. Web servers which serve `/.well-known/nostr.json` files dynamically based on the query string SHOULD also serve the relays data for any name they serve in the same reply when that is available. The optional `"relays"` attribute may contain an object with public keys as properties and arrays of relay URLs as values. When present, that can be used to help clients learn in which relays the specific user may be found. Web servers which serve `/.well-known/nostr.json` files dynamically based on the query string SHOULD also serve the relays data for any name they serve in the same reply when that is available.
## Finding users from their NIP-05 identifier ## Finding users from their NIP-05 identifier
@ -64,7 +64,7 @@ For example, if after finding that `bob@bob.com` has the public key `abc...def`,
### Public keys must be in hex format ### Public keys must be in hex format
Keys must be returned in hex format. Keys in NIP-19 `npub` format are are only meant to be used for display in client UIs, not in this NIP. Keys must be returned in hex format. Keys in NIP-19 `npub` format are only meant to be used for display in client UIs, not in this NIP.
### User Discovery implementation suggestion ### User Discovery implementation suggestion
@ -76,7 +76,7 @@ Clients may treat the identifier `_@domain` as the "root" identifier, and choose
### Reasoning for the `/.well-known/nostr.json?name=<local-part>` format ### Reasoning for the `/.well-known/nostr.json?name=<local-part>` format
By adding the `<local-part>` as a query string instead of as part of the path the protocol can support both dynamic servers that can generate JSON on-demand and static servers with a JSON file in it that may contain multiple names. By adding the `<local-part>` as a query string instead of as part of the path, the protocol can support both dynamic servers that can generate JSON on-demand and static servers with a JSON file in it that may contain multiple names.
### Allowing access from JavaScript apps ### Allowing access from JavaScript apps

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@ -8,8 +8,8 @@ Basic key derivation from mnemonic seed phrase
[BIP39](https://bips.xyz/39) is used to generate mnemonic seed words and derive a binary seed from them. [BIP39](https://bips.xyz/39) is used to generate mnemonic seed words and derive a binary seed from them.
[BIP32](https://bips.xyz/32) is used to derive the path `m/44'/1237'/0'/0/0` (according to the Nostr entry on [SLIP44](https://github.com/satoshilabs/slips/blob/master/slip-0044.md)). [BIP32](https://bips.xyz/32) is used to derive the path `m/44'/1237'/<account>'/0/0` (according to the Nostr entry on [SLIP44](https://github.com/satoshilabs/slips/blob/master/slip-0044.md)).
This is the default for a basic, normal, single-key client. A basic client can simply use an `account` of `0` to derive a single key. For more advanced use-cases you can increment `account`, allowing generation of practically infinite keys from the 5-level path with hardened derivation.
Other types of clients can still get fancy and use other derivation paths for their own other purposes. Other types of clients can still get fancy and use other derivation paths for their own other purposes.

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@ -24,8 +24,12 @@ async window.nostr.nip04.decrypt(pubkey, ciphertext): string // takes ciphertext
### Implementation ### Implementation
- [horse](https://github.com/fiatjaf/horse) (Chrome and derivatives)
- [nos2x](https://github.com/fiatjaf/nos2x) (Chrome and derivatives) - [nos2x](https://github.com/fiatjaf/nos2x) (Chrome and derivatives)
- [Alby](https://getalby.com) (Chrome and derivatives, Firefox, Safari) - [Alby](https://getalby.com) (Chrome and derivatives, Firefox)
- [Blockcore](https://www.blockcore.net/wallet) (Chrome and derivatives) - [Blockcore](https://www.blockcore.net/wallet) (Chrome and derivatives)
- [nos2x-fox](https://diegogurpegui.com/nos2x-fox/) (Firefox) - [nos2x-fox](https://diegogurpegui.com/nos2x-fox/) (Firefox)
- [Flamingo](https://www.getflamingo.org/) (Chrome and derivatives) - [Flamingo](https://www.getflamingo.org/) (Chrome and derivatives)
- [AKA Profiles](https://github.com/neilck/aka-extension) (Chrome, stores multiple keys)
- [TokenPocket](https://www.tokenpocket.pro/) (Android, IOS, Chrome and derivatives)
- [Nostrmo](https://github.com/haorendashu/nostrmo_faq#download) (Android, IOS)

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@ -1,10 +1,12 @@
> __Warning__ `unrecommended`: deprecated in favor of [NIP-27](27.md)
NIP-08 NIP-08
====== ======
Handling Mentions Handling Mentions
----------------- -----------------
`final` `optional` `author:fiatjaf` `author:scsibug` `final` `unrecommended` `optional` `author:fiatjaf` `author:scsibug`
This document standardizes the treatment given by clients of inline mentions of other events and pubkeys inside the content of `text_note`s. This document standardizes the treatment given by clients of inline mentions of other events and pubkeys inside the content of `text_note`s.

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@ -8,7 +8,7 @@ Event Deletion
A special event with kind `5`, meaning "deletion" is defined as having a list of one or more `e` tags, each referencing an event the author is requesting to be deleted. A special event with kind `5`, meaning "deletion" is defined as having a list of one or more `e` tags, each referencing an event the author is requesting to be deleted.
Each tag entry must contain an "e" event id intended for deletion. Each tag entry must contain an "e" event id and/or NIP-33 `a` tags intended for deletion.
The event's `content` field MAY contain a text note describing the reason for the deletion. The event's `content` field MAY contain a text note describing the reason for the deletion.
@ -21,19 +21,20 @@ For example:
"tags": [ "tags": [
["e", "dcd59..464a2"], ["e", "dcd59..464a2"],
["e", "968c5..ad7a4"], ["e", "968c5..ad7a4"],
["a", "<kind>:<pubkey>:<d-identifier>"]
], ],
"content": "these posts were published by accident", "content": "these posts were published by accident",
...other fields ...other fields
} }
``` ```
Relays SHOULD delete or stop publishing any referenced events that have an identical `id` as the deletion request. Clients SHOULD hide or otherwise indicate a deletion status for referenced events. Relays SHOULD delete or stop publishing any referenced events that have an identical `pubkey` as the deletion request. Clients SHOULD hide or otherwise indicate a deletion status for referenced events.
Relays SHOULD continue to publish/share the deletion events indefinitely, as clients may already have the event that's intended to be deleted. Additionally, clients SHOULD broadcast deletion events to other relays which don't have it. Relays SHOULD continue to publish/share the deletion events indefinitely, as clients may already have the event that's intended to be deleted. Additionally, clients SHOULD broadcast deletion events to other relays which don't have it.
## Client Usage ## Client Usage
Clients MAY choose to fully hide any events that are referenced by valid deletion events. This includes text notes, direct messages, or other yet-to-be defined event kinds. Alternatively, they MAY show the event along with an icon or other indication that the author has "disowned" the event. The `content` field MAY also be used to replace the deleted event's own content, although a user interface should clearly indicate that this is a deletion reason, not the original content. Clients MAY choose to fully hide any events that are referenced by valid deletion events. This includes text notes, direct messages, or other yet-to-be defined event kinds. Alternatively, they MAY show the event along with an icon or other indication that the author has "disowned" the event. The `content` field MAY also be used to replace the deleted events' own content, although a user interface should clearly indicate that this is a deletion reason, not the original content.
A client MUST validate that each event `pubkey` referenced in the `e` tag of the deletion request is identical to the deletion request `pubkey`, before hiding or deleting any event. Relays can not, in general, perform this validation and should not be treated as authoritative. A client MUST validate that each event `pubkey` referenced in the `e` tag of the deletion request is identical to the deletion request `pubkey`, before hiding or deleting any event. Relays can not, in general, perform this validation and should not be treated as authoritative.

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@ -46,7 +46,7 @@ Where:
* `<relay-url>` is the URL of a recommended relay associated with the reference. Clients SHOULD add a valid `<relay-URL>` field, but may instead leave it as `""`. * `<relay-url>` is the URL of a recommended relay associated with the reference. Clients SHOULD add a valid `<relay-URL>` field, but may instead leave it as `""`.
* `<marker>` is optional and if present is one of `"reply"`, `"root"`, or `"mention"`. * `<marker>` is optional and if present is one of `"reply"`, `"root"`, or `"mention"`.
**The order of marked "e" tags is not relevant.** Those marked with `"reply"` denote the id of the reply event being responded to. Those marked with `"root"` denote the root id of the reply thread being responded to. For top level replies (those replying directly to the root event), only the `"root"` marker should be used. Those marked with `"mention"` denote a quoted or reposted event id. Those marked with `"reply"` denote the id of the reply event being responded to. Those marked with `"root"` denote the root id of the reply thread being responded to. For top level replies (those replying directly to the root event), only the `"root"` marker should be used. Those marked with `"mention"` denote a quoted or reposted event id.
A direct reply to the root of a thread should have a single marked "e" tag of type "root". A direct reply to the root of a thread should have a single marked "e" tag of type "root".

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@ -4,7 +4,7 @@ NIP-11
Relay Information Document Relay Information Document
--------------------------- ---------------------------
`draft` `optional` `author:scsibug` `draft` `optional` `author:scsibug` `author:doc-hex` `author:cameri`
Relays may provide server metadata to clients to inform them of capabilities, administrative contacts, and various server attributes. This is made available as a JSON document over HTTP, on the same URI as the relay's websocket. Relays may provide server metadata to clients to inform them of capabilities, administrative contacts, and various server attributes. This is made available as a JSON document over HTTP, on the same URI as the relay's websocket.
@ -56,3 +56,241 @@ The relay server implementation MAY be provided in the `software` attribute. If
### Version ### ### Version ###
The relay MAY choose to publish its software version as a string attribute. The string format is defined by the relay implementation. It is recommended this be a version number or commit identifier. The relay MAY choose to publish its software version as a string attribute. The string format is defined by the relay implementation. It is recommended this be a version number or commit identifier.
Extra Fields
-----------------
### Server Limitations ###
These are limitations imposed by the relay on clients. Your client
should expect that requests which exceed these *practical* limitations
are rejected or fail immediately.
```json
{
...
"limitation": {
"max_message_length": 16384,
"max_subscriptions": 20,
"max_filters": 100,
"max_limit": 5000,
"max_subid_length": 100,
"min_prefix": 4,
"max_event_tags": 100,
"max_content_length": 8196,
"min_pow_difficulty": 30,
"auth_required": true,
"payment_required": true,
}
...
}
```
- `max_message_length`: this is the maximum number of bytes for incoming JSON that the relay
will attempt to decode and act upon. When you send large subscriptions, you will be
limited by this value. It also effectively limits the maximum size of any event. Value is
calculated from `[` to `]` and is after UTF-8 serialization (so some unicode characters
will cost 2-3 bytes). It is equal to the maximum size of the WebSocket message frame.
- `max_subscriptions`: total number of subscriptions that may be
active on a single websocket connection to this relay. It's possible
that authenticated clients with a (paid) relationship to the relay
may have higher limits.
- `max_filters`: maximum number of filter values in each subscription.
Must be one or higher.
- `max_subid_length`: maximum length of subscription id as a string.
- `min_prefix`: for `authors` and `ids` filters which are to match against
a hex prefix, you must provide at least this many hex digits in the prefix.
- `max_limit`: the relay server will clamp each filter's `limit` value to this number.
This means the client won't be able to get more than this number
of events from a single subscription filter. This clamping is typically done silently
by the relay, but with this number, you can know that there are additional results
if you narrowed your filter's time range or other parameters.
- `max_event_tags`: in any event, this is the maximum number of elements in the `tags` list.
- `max_content_length`: maximum number of characters in the `content`
field of any event. This is a count of unicode characters. After
serializing into JSON it may be larger (in bytes), and is still
subject to the `max_message_length`, if defined.
- `min_pow_difficulty`: new events will require at least this difficulty of PoW,
based on [NIP-13](13.md), or they will be rejected by this server.
- `auth_required`: this relay requires [NIP-42](42.md) authentication
to happen before a new connection may perform any other action.
Even if set to False, authentication may be required for specific actions.
- `payment_required`: this relay requires payment before a new connection may perform any action.
### Event Retention ###
There may be a cost associated with storing data forever, so relays
may wish to state retention times. The values stated here are defaults
for unauthenticated users and visitors. Paid users would likely have
other policies.
Retention times are given in seconds, with `null` indicating infinity.
If zero is provided, this means the event will not be stored at
all, and preferably an error will be provided when those are received.
```json
{
...
"retention": [
{ "kinds": [0, 1, [5, 7], [40, 49]], "time": 3600 },
{ "kinds": [[40000, 49999]], "time": 100 },
{ "kinds": [[30000, 39999]], "count": 1000 },
{ "time": 3600, "count": 10000 }
]
...
}
```
`retention` is a list of specifications: each will apply to either all kinds, or
a subset of kinds. Ranges may be specified for the kind field as a tuple of inclusive
start and end values. Events of indicated kind (or all) are then limited to a `count`
and/or time period.
It is possible to effectively blacklist Nostr-based protocols that rely on
a specific `kind` number, by giving a retention time of zero for those `kind` values.
While that is unfortunate, it does allow clients to discover servers that will
support their protocol quickly via a single HTTP fetch.
There is no need to specify retention times for _ephemeral events_ since they are not retained.
### Content Limitations ###
Some relays may be governed by the arbitrary laws of a nation state. This
may limit what content can be stored in cleartext on those relays. All
clients are encouraged to use encryption to work around this limitation.
It is not possible to describe the limitations of each country's laws
and policies which themselves are typically vague and constantly shifting.
Therefore, this field allows the relay operator to indicate which
countries' laws might end up being enforced on them, and then
indirectly on their users' content.
Users should be able to avoid relays in countries they don't like,
and/or select relays in more favourable zones. Exposing this
flexibility is up to the client software.
```json
{
...
"relay_countries": [ "CA", "US" ],
...
}
```
- `relay_countries`: a list of two-level ISO country codes (ISO 3166-1 alpha-2) whose
laws and policies may affect this relay. `EU` may be used for European Union countries.
Remember that a relay may be hosted in a country which is not the
country of the legal entities who own the relay, so it's very
likely a number of countries are involved.
### Community Preferences ###
For public text notes at least, a relay may try to foster a
local community. This would encourage users to follow the global
feed on that relay, in addition to their usual individual follows.
To support this goal, relays MAY specify some of the following values.
```json
{
...
"language_tags": [ "en", "en-419" ],
"tags": [ "sfw-only", "bitcoin-only", "anime" ],
"posting_policy": "https://example.com/posting-policy.html",
...
}
```
- `language_tags` is an ordered list
of [IETF language tags](https://en.wikipedia.org/wiki/IETF_language_tag) indicating
the major languages spoken on the relay.
- `tags` is a list of limitations on the topics to be discussed.
For example `sfw-only` indicates that only "Safe For Work" content
is encouraged on this relay. This relies on assumptions of what the
"work" "community" feels "safe" talking about. In time, a common
set of tags may emerge that allow users to find relays that suit
their needs, and client software will be able to parse these tags easily.
The `bitcoin-only` tag indicates that any *altcoin*, *"crypto"* or *blockchain*
comments will be ridiculed without mercy.
- `posting_policy` is a link to a human-readable page which specifies the
community policies for the relay. In cases where `sfw-only` is True, it's
important to link to a page which gets into the specifics of your posting policy.
The `description` field should be used to describe your community
goals and values, in brief. The `posting_policy` is for additional
detail and legal terms. Use the `tags` field to signify limitations
on content, or topics to be discussed, which could be machine
processed by appropriate client software.
### Pay-To-Relay ###
Relays that require payments may want to expose their fee schedules.
```json
{
...
"payments_url": "https://my-relay/payments",
"fees": {
"admission": [{ "amount": 1000000, "unit": "msats" }],
"subscription": [{ "amount": 5000000, "unit": "msats", "period": 2592000 }],
"publication": [{ "kinds": [4], "amount": 100, "unit": "msats" }],
},
...
}
```
### Icon ###
A URL pointing to an image to be used as an icon for the relay. Recommended to be squared in shape.
```json
{
...
"icon": "https://nostr.build/i/53866b44135a27d624e99c6165cabd76ac8f72797209700acb189fce75021f47.jpg",
...
}
```
### Examples ###
As of 2 May 2023 the following `curl` command provided these results.
>curl -H "Accept: application/nostr+json" https://eden.nostr.land
{"name":"eden.nostr.land",
"description":"Eden Nostr Land - Toronto 1-01",
"pubkey":"00000000827ffaa94bfea288c3dfce4422c794fbb96625b6b31e9049f729d700",
"contact":"me@ricardocabral.io",
"supported_nips":[1,2,4,9,11,12,15,16,20,22,26,28,33,40],
"supported_nip_extensions":["11a"],
"software":"git+https://github.com/Cameri/nostream.git",
"version":"1.22.6",
"limitation":{"max_message_length":1048576,
"max_subscriptions":10,
"max_filters":2500,
"max_limit":5000,
"max_subid_length":256,
"min_prefix":4,
"max_event_tags":2500,
"max_content_length":65536,
"min_pow_difficulty":0,
"auth_required":false,
"payment_required":true},
"payments_url":"https://eden.nostr.land/invoices",
"fees":{"admission":[{"amount":5000000,"unit":"msats"}],
"publication":[]}},
"icon": "https://nostr.build/i/53866b44135a27d624e99c6165cabd76ac8f72797209700acb189fce75021f47.jpg"

37
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@ -4,39 +4,6 @@ NIP-12
Generic Tag Queries Generic Tag Queries
------------------- -------------------
`draft` `optional` `author:scsibug` `author:fiatjaf` `final` `mandatory` `author:scsibug` `author:fiatjaf`
Relays may support subscriptions over arbitrary tags. `NIP-01` requires relays to respond to queries for `e` and `p` tags. This NIP allows any single-letter tag present in an event to be queried. Moved to [NIP-01](01.md).
The `<filters>` object described in `NIP-01` is expanded to contain arbitrary keys with a `#` prefix. Any single-letter key in a filter beginning with `#` is a tag query, and MUST have a value of an array of strings. The filter condition matches if the event has a tag with the same name, and there is at least one tag value in common with the filter and event. The tag name is the letter without the `#`, and the tag value is the second element. Subsequent elements are ignored for the purposes of tag queries.
Example Subscription Filter
---------------------------
The following provides an example of a filter that matches events of kind `1` with an `r` tag set to either `foo` or `bar`.
```
{
"kinds": [1],
"#r": ["foo", "bar"]
}
```
Client Behavior
---------------
Clients SHOULD use the `supported_nips` field to learn if a relay supports generic tag queries. Clients MAY send generic tag queries to any relay, if they are prepared to filter out extraneous responses from relays that do not support this NIP.
Rationale
---------
The decision to reserve only single-letter tags to be usable in queries allow applications to make use of tags for all sorts of metadata, as it is their main purpose, without worrying that they might be bloating relay indexes. That also makes relays more lightweight, of course. And if some application or user is abusing single-letter tags with the intention of bloating relays that becomes easier to detect as single-letter tags will hardly be confused with some actually meaningful metadata some application really wanted to attach to the event with no spammy intentions.
Suggested Use Cases
-------------------
Motivating examples for generic tag queries are provided below. This NIP does not promote or standardize the use of any specific tag for any purpose.
* Decentralized Commenting System: clients can comment on arbitrary web pages, and easily search for other comments, by using a `r` ("reference", in this case an URL) tag and value.
* Location-specific Posts: clients can use a `g` ("geohash") tag to associate a post with a physical location. Clients can search for a set of geohashes of varying precisions near them to find local content.
* Hashtags: clients can use simple `t` ("hashtag") tags to associate an event with an easily searchable topic name. Since Nostr events themselves are not searchable through the protocol, this provides a mechanism for user-driven search.

80
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@ -10,13 +10,15 @@ This NIP defines a way to generate and interpret Proof of Work for nostr notes.
`difficulty` is defined to be the number of leading zero bits in the `NIP-01` id. For example, an id of `000000000e9d97a1ab09fc381030b346cdd7a142ad57e6df0b46dc9bef6c7e2d` has a difficulty of `36` with `36` leading 0 bits. `difficulty` is defined to be the number of leading zero bits in the `NIP-01` id. For example, an id of `000000000e9d97a1ab09fc381030b346cdd7a142ad57e6df0b46dc9bef6c7e2d` has a difficulty of `36` with `36` leading 0 bits.
`002f...` is `0000 0000 0010 1111...` in binary, which has 10 leading zeroes. Do not forget to count leading zeroes for hex digits <= `7`.
Mining Mining
------ ------
To generate PoW for a `NIP-01` note, a `nonce` tag is used: To generate PoW for a `NIP-01` note, a `nonce` tag is used:
```json ```json
{"content": "It's just me mining my own business", "tags": [["nonce", "1", "20"]]} {"content": "It's just me mining my own business", "tags": [["nonce", "1", "21"]]}
``` ```
When mining, the second entry to the nonce tag is updated, and then the id is recalculated (see [NIP-01](./01.md)). If the id has the desired number of leading zero bits, the note has been mined. It is recommended to update the `created_at` as well during this process. When mining, the second entry to the nonce tag is updated, and then the id is recalculated (see [NIP-01](./01.md)). If the id has the desired number of leading zero bits, the note has been mined. It is recommended to update the `created_at` as well during this process.
@ -36,7 +38,7 @@ Example mined note
[ [
"nonce", "nonce",
"776797", "776797",
"20" "21"
] ]
], ],
"content": "It's just me mining my own business", "content": "It's just me mining my own business",
@ -47,40 +49,68 @@ Example mined note
Validating Validating
---------- ----------
Here is some reference C code for calculating the difficulty (aka number of leading zero bits) in a nostr note id: Here is some reference C code for calculating the difficulty (aka number of leading zero bits) in a nostr event id:
```c ```c
int zero_bits(unsigned char b) #include <stdio.h>
{ #include <stdlib.h>
int n = 0; #include <string.h>
if (b == 0) int countLeadingZeroes(const char *hex) {
return 8; int count = 0;
while (b >>= 1) for (int i = 0; i < strlen(hex); i++) {
n++; int nibble = (int)strtol((char[]){hex[i], '\0'}, NULL, 16);
if (nibble == 0) {
return 7-n; count += 4;
} } else {
count += __builtin_clz(nibble) - 28;
/* find the number of leading zero bits in a hash */
int count_leading_zero_bits(unsigned char *hash)
{
int bits, total, i;
for (i = 0, total = 0; i < 32; i++) {
bits = zero_bits(hash[i]);
total += bits;
if (bits != 8)
break; break;
} }
return total; }
return count;
}
int main(int argc, char *argv[]) {
if (argc != 2) {
fprintf(stderr, "Usage: %s <hex_string>\n", argv[0]);
return 1;
}
const char *hex_string = argv[1];
int result = countLeadingZeroes(hex_string);
printf("Leading zeroes in hex string %s: %d\n", hex_string, result);
return 0;
}
```
Here is some JavaScript code for doing the same thing:
```javascript
// hex should be a hexadecimal string (with no 0x prefix)
function countLeadingZeroes(hex) {
let count = 0;
for (let i = 0; i < hex.length; i++) {
const nibble = parseInt(hex[i], 16);
if (nibble === 0) {
count += 4;
} else {
count += Math.clz32(nibble) - 28;
break;
}
}
return count;
} }
``` ```
Querying relays for PoW notes Querying relays for PoW notes
----------------------------- -----------------------------
Since relays allow searching on prefixes, you can use this as a way to filter notes of a certain difficulty: If relays allow searching on prefixes, you can use this as a way to filter notes of a certain difficulty:
``` ```
$ echo '["REQ", "subid", {"ids": ["000000000"]}]' | websocat wss://some-relay.com | jq -c '.[2]' $ echo '["REQ", "subid", {"ids": ["000000000"]}]' | websocat wss://some-relay.com | jq -c '.[2]'
@ -90,4 +120,4 @@ $ echo '["REQ", "subid", {"ids": ["000000000"]}]' | websocat wss://some-relay.c
Delegated Proof of Work Delegated Proof of Work
----------------------- -----------------------
Since the `NIP-01` note id does not commit to any signature, PoW can be outsourced to PoW providers, perhaps for a fee. This provides a way for clients to get their messages out to PoW-restricted relays without having to do any work themselves, which is useful for energy constrained devices like on mobile Since the `NIP-01` note id does not commit to any signature, PoW can be outsourced to PoW providers, perhaps for a fee. This provides a way for clients to get their messages out to PoW-restricted relays without having to do any work themselves, which is useful for energy-constrained devices like mobile phones.

4
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@ -1,8 +1,8 @@
NIP-14 NIP-14
====== ======
Subject tag in Text events. Subject tag in Text events
--------------------------- --------------------------
`draft` `optional` `author:unclebobmartin` `draft` `optional` `author:unclebobmartin`

231
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@ -1,21 +1,230 @@
NIP-15 NIP-15
====== ======
End of Stored Events Notice Nostr Marketplace (for resilient marketplaces)
--------------------------- -----------------------------------
`final` `optional` `author:Semisol` `draft` `optional` `author:fiatjaf` `author:benarc` `author:motorina0` `author:talvasconcelos`
Relays may support notifying clients when all stored events have been sent. > Based on https://github.com/lnbits/Diagon-Alley
If a relay supports this NIP, the relay SHOULD send the client a `EOSE` message in the format `["EOSE", <subscription_id>]` after it has sent all the events it has persisted and it indicates all the events that come after this message are newly published. > Implemented in [NostrMarket](https://github.com/lnbits/nostrmarket) and [Plebeian Market](https://github.com/PlebeianTech/plebeian-market)
Client Behavior ## Terms
---------------
Clients SHOULD use the `supported_nips` field to learn if a relay supports end of stored events notices. - `merchant` - seller of products with NOSTR key-pair
- `customer` - buyer of products with NOSTR key-pair
- `product` - item for sale by the `merchant`
- `stall` - list of products controlled by `merchant` (a `merchant` can have multiple stalls)
- `marketplace` - clientside software for searching `stalls` and purchasing `products`
Motivation ## Nostr Marketplace Clients
----------
The motivation for this proposal is to reduce uncertainty when all events have been sent by a relay to make client code possibly less complex. ### Merchant admin
Where the `merchant` creates, updates and deletes `stalls` and `products`, as well as where they manage sales, payments and communication with `customers`.
The `merchant` admin software can be purely clientside, but for `convenience` and uptime, implementations will likely have a server client listening for NOSTR events.
### Marketplace
`Marketplace` software should be entirely clientside, either as a stand-alone app, or as a purely frontend webpage. A `customer` subscribes to different merchant NOSTR public keys, and those `merchants` `stalls` and `products` become listed and searchable. The marketplace client is like any other ecommerce site, with basket and checkout. `Marketplaces` may also wish to include a `customer` support area for direct message communication with `merchants`.
## `Merchant` publishing/updating products (event)
A merchant can publish these events:
| Kind | | Description |
| --------- | ------------------ | --------------------------------------------------------------------------------------------------------------- |
| `0 ` | `set_meta` | The merchant description (similar with any `nostr` public key). |
| `30017` | `set_stall` | Create or update a stall. |
| `30018` | `set_product` | Create or update a product. |
| `4 ` | `direct_message` | Communicate with the customer. The messages can be plain-text or JSON. |
| `5 ` | `delete` | Delete a product or a stall. |
### Event `30017`: Create or update a stall.
**Event Content**:
```json
{
"id": <String, UUID generated by the merchant. Sequential IDs (`0`, `1`, `2`...) are discouraged>,
"name": <String, stall name>,
"description": <String (optional), stall description>,
"currency": <String, currency used>,
"shipping": [
{
"id": <String, UUID of the shipping zone, generated by the merchant>,
"name": <String (optional), zone name>,
"cost": <float, base cost for shipping. The currency is defined at the stall level>,
"regions": [<String, regions included in this zone>],
}
]
}
```
Fields that are not self-explanatory:
- `shipping`:
- an array with possible shipping zones for this stall.
- the customer MUST choose exactly one of those shipping zones.
- shipping to different zones can have different costs. For some goods (digital for example) the cost can be zero.
- the `id` is an internal value used by the merchant. This value must be sent back as the customer selection.
- each shipping zone contains the base cost for orders made to that shipping zone, but a specific shipping cost per
product can also be specified if the shipping cost for that product is higher than what's specified by the base cost.
**Event Tags**:
```json
"tags": [["d", <String, id of stall]]
```
- the `d` tag is required, its value MUST be the same as the stall `id`.
### Event `30018`: Create or update a product
**Event Content**:
```json
{
"id": <String, UUID generated by the merchant.Sequential IDs (`0`, `1`, `2`...) are discouraged>,
"stall_id": <String, UUID of the stall to which this product belong to>,
"name": <String, product name>,
"description": <String (optional), product description>,
"images": <[String], array of image URLs, optional>,
"currency": <String, currency used>,
"price": <float, cost of product>,
"quantity": <int, available items>,
"specs": [
[<String, spec key>, <String, spec value>]
],
"shipping": [
{
"id": <String, UUID of the shipping zone. Must match one of the zones defined for the stall>,
"cost": <float, extra cost for shipping. The currency is defined at the stall level>,
}
]
}
```
Fields that are not self-explanatory:
- `specs`:
- an optional array of key pair values. It allows for the Customer UI to present product specifications in a structure mode. It also allows comparison between products
- eg: `[["operating_system", "Android 12.0"], ["screen_size", "6.4 inches"], ["connector_type", "USB Type C"]]`
_Open_: better to move `spec` in the `tags` section of the event?
- `shipping`:
- an _optional_ array of extra costs to be used per shipping zone, only for products that require special shipping costs to be added to the base shipping cost defined in the stall
- the `id` should match the id of the shipping zone, as defined in the `shipping` field of the stall
- to calculate the total cost of shipping for an order, the user will choose a shipping option during checkout, and then the client must consider this costs:
- the `base cost from the stall` for the chosen shipping option
- the result of multiplying the product units by the `shipping costs specified in the product`, if any.
**Event Tags**:
```json
"tags": [
["d", <String, id of product],
["t", <String (optional), product category],
["t", <String (optional), product category],
...
]
```
- the `d` tag is required, its value MUST be the same as the product `id`.
- the `t` tag is as searchable tag, it represents different categories that the product can be part of (`food`, `fruits`). Multiple `t` tags can be present.
## Checkout events
All checkout events are sent as JSON strings using ([NIP04](https://github.com/nostr-protocol/nips/blob/master/04.md)).
The `merchant` and the `customer` can exchange JSON messages that represent different actions. Each `JSON` message `MUST` have a `type` field indicating the what the JSON represents. Possible types:
| Message Type | Sent By | Description |
|--------------|----------|---------------------|
| 0 | Customer | New Order |
| 1 | Merchant | Payment Request |
| 2 | Merchant | Order Status Update |
### Step 1: `customer` order (event)
The below json goes in content of [NIP04](https://github.com/nostr-protocol/nips/blob/master/04.md).
```json
{
"id": <String, UUID generated by the customer>,
"type": 0,
"name": <String (optional), ???>,
"address": <String (optional), for physical goods an address should be provided>
"message": "<String (optional), message for merchant>,
"contact": {
"nostr": <32-bytes hex of a pubkey>,
"phone": <String (optional), if the customer wants to be contacted by phone>,
"email": <String (optional), if the customer wants to be contacted by email>,
},
"items": [
{
"product_id": <String, UUID of the product>,
"quantity": <int, how many products the customer is ordering>
}
],
"shipping_id": <String, UUID of the shipping zone>
}
```
_Open_: is `contact.nostr` required?
### Step 2: `merchant` request payment (event)
Sent back from the merchant for payment. Any payment option is valid that the merchant can check.
The below json goes in `content` of [NIP04](https://github.com/nostr-protocol/nips/blob/master/04.md).
`payment_options`/`type` include:
- `url` URL to a payment page, stripe, paypal, btcpayserver, etc
- `btc` onchain bitcoin address
- `ln` bitcoin lightning invoice
- `lnurl` bitcoin lnurl-pay
```json
{
"id": <String, UUID of the order>,
"type": 1,
"message": <String, message to customer, optional>,
"payment_options": [
{
"type": <String, option type>,
"link": <String, url, btc address, ln invoice, etc>
},
{
"type": <String, option type>,
"link": <String, url, btc address, ln invoice, etc>
},
{
"type": <String, option type>,
"link": <String, url, btc address, ln invoice, etc>
}
]
}
```
### Step 3: `merchant` verify payment/shipped (event)
Once payment has been received and processed.
The below json goes in `content` of [NIP04](https://github.com/nostr-protocol/nips/blob/master/04.md).
```json
{
"id": <String, UUID of the order>,
"type": 2,
"message": <String, message to customer>,
"paid": <Bool, true/false has received payment>,
"shipped": <Bool, true/false has been shipped>,
}
```
## Customer support events
Customer support is handled over whatever communication method was specified. If communicating via nostr, NIP-04 is used https://github.com/nostr-protocol/nips/blob/master/04.md.
## Additional
Standard data models can be found <a href="https://raw.githubusercontent.com/lnbits/nostrmarket/main/models.py">here</a>

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@ -4,33 +4,6 @@ NIP-16
Event Treatment Event Treatment
--------------- ---------------
`draft` `optional` `author:Semisol` `final` `mandatory` `author:Semisol`
Relays may decide to allow replaceable and/or ephemeral events. Moved to [NIP-01](01.md).
Regular Events
------------------
A *regular event* is defined as an event with a kind `1000 <= n < 10000`.
Upon a regular event being received, the relay SHOULD send it to all clients with a matching filter, and SHOULD store it. New events of the same kind do not affect previous events in any way.
Replaceable Events
------------------
A *replaceable event* is defined as an event with a kind `10000 <= n < 20000`.
Upon a replaceable event with a newer timestamp than the currently known latest replaceable event with the same kind being received, and signed by the same key, the old event SHOULD be discarded and replaced with the newer event.
Ephemeral Events
----------------
An *ephemeral event* is defined as an event with a kind `20000 <= n < 30000`.
Upon an ephemeral event being received, the relay SHOULD send it to all clients with a matching filter, and MUST NOT store it.
Client Behavior
---------------
Clients SHOULD use the `supported_nips` field to learn if a relay supports this NIP. Clients SHOULD NOT send ephemeral events to relays that do not support this NIP; they will most likely be persisted. Clients MAY send replaceable events to relays that may not support this NIP, and clients querying SHOULD be prepared for the relay to send multiple events and should use the latest one.
Suggested Use Cases
-------------------
* States: An application may create a state event that is replaced every time a new state is set (such as statuses)
* Typing indicators: A chat application may use ephemeral events as a typing indicator.
* Messaging: Two pubkeys can message over nostr using ephemeral events.

34
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@ -0,0 +1,34 @@
NIP-18
======
Reposts
-------
`draft` `optional` `author:jb55` `author:fiatjaf` `author:arthurfranca`
A repost is a `kind 6` event that is used to signal to followers
that a `kind 1` text note is worth reading.
The `content` of a repost event is _the stringified JSON of the reposted note_. It MAY also be empty, but that is not recommended.
The repost event MUST include an `e` tag with the `id` of the note that is
being reposted. That tag MUST include a relay URL as its third entry
to indicate where it can be fetched.
The repost SHOULD include a `p` tag with the `pubkey` of the event being
reposted.
## Quote Reposts
Quote reposts are `kind 1` events with an embedded `e` tag
(see [NIP-08](08.md) and [NIP-27](27.md)). Because a quote repost includes
an `e` tag, it may show up along replies to the reposted note.
## Generic Reposts
Since `kind 6` reposts are reserved for `kind 1` contents, we use `kind 16`
as a "generic repost", that can include any kind of event inside other than
`kind 1`.
`kind 16` reposts SHOULD contain a `k` tag with the stringified kind number
of the reposted event as its value.

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@ -35,7 +35,7 @@ These are the possible bech32 prefixes with `TLV`:
- `nprofile`: a nostr profile - `nprofile`: a nostr profile
- `nevent`: a nostr event - `nevent`: a nostr event
- `nrelay`: a nostr relay - `nrelay`: a nostr relay
- `naddr`: a nostr parameterized replaceable event coordinate (NIP-33) - `naddr`: a nostr _parameterized replaceable event_ coordinate
These possible standardized `TLV` types are indicated here: These possible standardized `TLV` types are indicated here:
@ -53,6 +53,7 @@ These possible standardized `TLV` types are indicated here:
- for `nevent`, _optionally_, the 32 bytes of the pubkey of the event - for `nevent`, _optionally_, the 32 bytes of the pubkey of the event
- `3`: `kind` - `3`: `kind`
- for `naddr`, the 32-bit unsigned integer of the kind, big-endian - for `naddr`, the 32-bit unsigned integer of the kind, big-endian
- for `nevent`, _optionally_, the 32-bit unsigned integer of the kind, big-endian
## Examples ## Examples
@ -66,3 +67,4 @@ These possible standardized `TLV` types are indicated here:
## Notes ## Notes
- `npub` keys MUST NOT be used in NIP-01 events or in NIP-05 JSON responses, only the hex format is supported there. - `npub` keys MUST NOT be used in NIP-01 events or in NIP-05 JSON responses, only the hex format is supported there.
- When decoding a bech32-formatted string, TLVs that are not recognized or supported should be ignored, rather than causing an error.

88
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@ -1,93 +1,9 @@
NIP-20 NIP-20
====== ======
Command Results Command Results
--------------- ---------------
`draft` `optional` `author:jb55` `final` `mandatory` `author:jb55`
When submitting events to relays, clients currently have no way to know if an event was successfully committed to the database. This NIP introduces the concept of command results which are like NOTICE's except provide more information about if an event was accepted or rejected. Moved to [NIP-01](01.md).
A command result is a JSON object with the following structure that is returned when an event is successfully saved to the database or rejected:
["OK", <event_id>, <true|false>, <message>]
Relays MUST return `true` when the event is a duplicate and has already been saved. The `message` SHOULD start with `duplicate:` in this case.
Relays MUST return `false` when the event was rejected and not saved.
The `message` SHOULD provide additional information as to why the command succeeded or failed.
The `message` SHOULD start with `blocked:` if the pubkey or network address has been blocked, banned, or is not on a whitelist.
The `message` SHOULD start with `invalid:` if the event is invalid or doesn't meet some specific criteria (created_at is too far off, id is wrong, signature is wrong, etc)
The `message` SHOULD start with `pow:` if the event doesn't meet some proof-of-work difficulty. The client MAY consult the relay metadata at this point to retrieve the required posting difficulty.
The `message` SHOULD start with `rate-limited:` if the event was rejected due to rate limiting techniques.
The `message` SHOULD start with `error:` if the event failed to save due to a server issue.
Ephemeral events are not acknowledged with OK responses, unless there is a failure.
If the event or `EVENT` command is malformed and could not be parsed, a NOTICE message SHOULD be used instead of a command result. This NIP only applies to non-malformed EVENT commands.
Examples
--------
Event successfully written to the database:
["OK", "b1a649ebe8b435ec71d3784793f3bbf4b93e64e17568a741aecd4c7ddeafce30", true, ""]
Event successfully written to the database because of a reason:
["OK", "b1a649ebe8b435ec71d3784793f3bbf4b93e64e17568a741aecd4c7ddeafce30", true, "pow: difficulty 25>=24"]
Event blocked due to ip filter
["OK", "b1a649ebe8...", false, "blocked: tor exit nodes not allowed"]
Event blocked due to pubkey ban
["OK", "b1a649ebe8...", false, "blocked: you are banned from posting here"]
Event blocked, pubkey not registered
["OK", "b1a649ebe8...", false, "blocked: please register your pubkey at https://my-expensive-relay.example.com"]
Event rejected, rate limited
["OK", "b1a649ebe8...", false, "rate-limited: slow down there chief"]
Event rejected, `created_at` too far off
["OK", "b1a649ebe8...", false, "invalid: event creation date is too far off from the current time. Is your system clock in sync?"]
Event rejected, insufficient proof-of-work difficulty
["OK", "b1a649ebe8...", false, "pow: difficulty 26 is less than 30"]
Event failed to save,
["OK", "b1a649ebe8...", false, "error: could not connect to the database"]
Client Handling
---------------
`messages` are meant for humans, with `reason:` prefixes so that clients can be slightly more intelligent with what to do with them. For example, with a `rate-limited:` reason the client may not show anything and simply try again with a longer timeout.
For the `pow:` prefix it may query relay metadata to get the updated difficulty requirement and try again in the background.
For the `invalid:` and `blocked:` prefix the client may wish to show these as styled error popups.
The prefixes include a colon so that the message can be cleanly separated from the prefix by taking everything after `:` and trimming it.
Future Extensions
-----------------
This proposal SHOULD be extended to support further commands in the future, such as REQ and AUTH. They are left out of this initial version to keep things simpler.

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@ -1,16 +1,16 @@
NIP-21 NIP-21
====== ======
`nostr:` URL scheme `nostr:` URI scheme
------------------- -------------------
`draft` `optional` `author:fiatjaf` `draft` `optional` `author:fiatjaf`
This NIP standardizes the usage of a common URL scheme for maximum interoperability and openness in the network. This NIP standardizes the usage of a common URI scheme for maximum interoperability and openness in the network.
The scheme is `nostr:`. The scheme is `nostr:`.
The identifiers that come after are expected to be the same as those defined in NIP-19 (except `nsec`). The identifiers that come after are expected to be the same as those defined in [NIP-19](https://github.com/nostr-protocol/nips/blob/master/19.md) (except `nsec`).
## Examples ## Examples

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@ -2,13 +2,13 @@ NIP-22
====== ======
Event `created_at` Limits Event `created_at` Limits
--------------------------- -------------------------
`draft` `optional` `author:jeffthibault` `author:Giszmo` `draft` `optional` `author:jeffthibault` `author:Giszmo`
Relays may define both upper and lower limits within which they will consider an event's `created_at` to be acceptable. Both the upper and lower limits MUST be unix timestamps in seconds as defined in [NIP-01](01.md). Relays may define both upper and lower limits within which they will consider an event's `created_at` to be acceptable. Both the upper and lower limits MUST be unix timestamps in seconds as defined in [NIP-01](01.md).
If a relay supports this NIP, the relay SHOULD send the client a [NIP-20](20.md) command result saying the event was not stored for the `created_at` timestamp not being within the permitted limits. If a relay supports this NIP, the relay SHOULD send the client an `OK` result saying the event was not stored for the `created_at` timestamp not being within the permitted limits.
Client Behavior Client Behavior
--------------- ---------------
@ -22,7 +22,7 @@ This NIP formalizes restrictions on event timestamps as accepted by a relay and
The event `created_at` field is just a unix timestamp and can be set to a time in the past or future. Relays accept and share events dated to 20 years ago or 50,000 years in the future. This NIP aims to define a way for relays that do not want to store events with *any* timestamp to set their own restrictions. The event `created_at` field is just a unix timestamp and can be set to a time in the past or future. Relays accept and share events dated to 20 years ago or 50,000 years in the future. This NIP aims to define a way for relays that do not want to store events with *any* timestamp to set their own restrictions.
[Replaceable events](16.md#replaceable-events) can behave rather unexpected if the user wrote them - or tried to write them - with a wrong system clock. Persisting an update with a backdated system now would result in the update not getting persisted without a notification and if they did the last update with a forward dated system, they will again fail to do another update with the now correct time. _Replaceable events_ can behave rather unexpectedly if the user wrote them - or tried to write them - with a wrong system clock. Persisting an update with a backdated system now would result in the update not getting persisted without a notification and if they did the last update with a forward dated system, they will again fail to do another update with the now correct time.
A wide adoption of this NIP could create a better user experience as it would decrease the amount of events that appear wildly out of order or even from impossible dates in the distant past or future. A wide adoption of this NIP could create a better user experience as it would decrease the amount of events that appear wildly out of order or even from impossible dates in the distant past or future.

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@ -6,17 +6,21 @@ Long-form Content
`draft` `optional` `author:fiatjaf` `draft` `optional` `author:fiatjaf`
This NIP defines `kind:30023` (a parameterized replaceable event according to NIP-33) for long-form text content, generally referred to as "articles" or "blog posts". This NIP defines `kind:30023` (a _parameterized replaceable event_) for long-form text content, generally referred to as "articles" or "blog posts". `kind:30024` has the same structure as `kind:30023` and is used to save long form drafts.
"Social" clients that deal primarily with `kind:1` notes should not be expected to implement this NIP. "Social" clients that deal primarily with `kind:1` notes should not be expected to implement this NIP.
### Format ### Format
The `.content` of these events should be a string text in Markdown syntax. The `.content` of these events should be a string text in Markdown syntax. To maximize compatibility and readability between different clients and devices, any client that is creating long form notes:
- MUST NOT hard line-break paragraphs of text, such as arbitrary line breaks at 80 column boundaries.
- MUST NOT support adding HTML to Markdown.
### Metadata ### Metadata
For the date of the last update the `.created_at` field should be used, for "tags"/"hashtags" (i.e. topics about which the event might be of relevance) the `"t"` event tag should be used, as per NIP-12. For the date of the last update the `.created_at` field should be used, for "tags"/"hashtags" (i.e. topics about which the event might be of relevance) the `t` tag should be used, as per NIP-12.
Other metadata fields can be added as tags to the event as necessary. Here we standardize 4 that may be useful, although they remain strictly optional: Other metadata fields can be added as tags to the event as necessary. Here we standardize 4 that may be useful, although they remain strictly optional:
@ -27,21 +31,15 @@ Other metadata fields can be added as tags to the event as necessary. Here we st
### Editability ### Editability
These articles are meant to be editable, so they should make use of the replaceability feature of NIP-33 and include a `"d"` tag with an identifier for the article. Clients should take care to only publish and read these events from relays that implement that. If they don't do that they should also take care to hide old versions of the same article they may receive. These articles are meant to be editable, so they should make use of the parameterized replaceability feature and include a `d` tag with an identifier for the article. Clients should take care to only publish and read these events from relays that implement that. If they don't do that they should also take care to hide old versions of the same article they may receive.
### Linking ### Linking
The article may be linked to using the NIP-19 `naddr` code along with the `"a"` tag (see NIP-33 and NIP-19). The article may be linked to using the [NIP-19](19.md) `naddr` code along with the `a` tag.
### References ### References
Clients that support publishing NIP-23 events should implement support for parsing pasted NIP-19 `naddr` identifiers and adding them automatically to the list of `.tags` of the event, replacing the actual content with a string like `#[tag_index]` in the same way as NIP-08 -- or, if the reference is in the form of a URL (for example, `[click here](naddr1...)`) then they should be replaced with just the tag number directly as if link with that name existed at the bottom of the Markdown (for example, `[click here][0]`). References to other Nostr notes, articles or profiles must be made according to [NIP-27](27.md), i.e. by using [NIP-21](21.md) `nostr:...` links and optionally adding tags for these (see example below).
Reader clients should parse the Markdown and replace these references with either internal links so the referenced events can be accessed directly, with NIP-21 `nostr:naddr1...` links or direct links to web clients that will handle these references.
The idea here is that having these tags is that reader clients can display a list of backreferences at the bottom when one article mentions another.
The same principles can be applied to `nevent1...`, `note1...`, `nprofile1...` or `npub1...`.
## Example Event ## Example Event
@ -49,7 +47,7 @@ The same principles can be applied to `nevent1...`, `note1...`, `nprofile1...` o
{ {
"kind": 30023, "kind": 30023,
"created_at": 1675642635, "created_at": 1675642635,
"content": "Lorem [ipsum][4] dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.\n\nRead more at #[3].", "content": "Lorem [ipsum][nostr:nevent1qqst8cujky046negxgwwm5ynqwn53t8aqjr6afd8g59nfqwxpdhylpcpzamhxue69uhhyetvv9ujuetcv9khqmr99e3k7mg8arnc9] dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.\n\nRead more at nostr:naddr1qqzkjurnw4ksz9thwden5te0wfjkccte9ehx7um5wghx7un8qgs2d90kkcq3nk2jry62dyf50k0h36rhpdtd594my40w9pkal876jxgrqsqqqa28pccpzu.",
"tags": [ "tags": [
["d", "lorem-ipsum"], ["d", "lorem-ipsum"],
["title", "Lorem Ipsum"], ["title", "Lorem Ipsum"],

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@ -16,10 +16,11 @@ A reaction with `content` set to `-` SHOULD be interpreted as a "dislike" or
"downvote". It SHOULD NOT be counted as a "like", and MAY be displayed as a "downvote". It SHOULD NOT be counted as a "like", and MAY be displayed as a
downvote or dislike on a post. A client MAY also choose to tally likes against downvote or dislike on a post. A client MAY also choose to tally likes against
dislikes in a reddit-like system of upvotes and downvotes, or display them as dislikes in a reddit-like system of upvotes and downvotes, or display them as
separate tallys. separate tallies.
The `content` MAY be an emoji, in this case it MAY be interpreted as a "like" or "dislike", The `content` MAY be an emoji, or [NIP-30](30.md) custom emoji in this case it MAY be interpreted as a "like" or "dislike",
or the client MAY display this emoji reaction on the post. or the client MAY display this emoji reaction on the post. If the `content` is an empty string then the client should
consider it a "+".
Tags Tags
---- ----
@ -47,3 +48,25 @@ func make_like_event(pubkey: String, privkey: String, liked: NostrEvent) -> Nost
ev.sign(privkey: privkey) ev.sign(privkey: privkey)
return ev return ev
} }
```
Custom Emoji Reaction
---------------------
The client may specify a custom emoji ([NIP-30](30.md)) `:shortcode:` in the
reaction content. The client should refer to the emoji tag and render the
content as an emoji if shortcode is specified.
```json
{
"kind": 7,
"content": ":soapbox:",
"tags": [
["emoji", "soapbox", "https://gleasonator.com/emoji/Gleasonator/soapbox.png"]
],
"pubkey": "79c2cae114ea28a981e7559b4fe7854a473521a8d22a66bbab9fa248eb820ff6",
"created_at": 1682790000
}
```
The content can be set only one `:shortcode:`. And emoji tag should be one.

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@ -1,4 +1,4 @@
NIP: 26 NIP-26
======= =======
Delegated Event Signing Delegated Event Signing
@ -52,7 +52,9 @@ For example, the following condition strings are valid:
- `kind=0&kind=1&created_at>1675721813` - `kind=0&kind=1&created_at>1675721813`
- `kind=1&created_at>1674777689&created_at<1675721813` - `kind=1&created_at>1674777689&created_at<1675721813`
For the vast majority of use-cases, it is advisable that query strings should include a `created_at` ***after*** condition reflecting the current time, to prevent the delegatee from publishing historic notes on the delegator's behalf. For the vast majority of use-cases, it is advisable that:
1. Query strings should include a `created_at` ***after*** condition reflecting the current time, to prevent the delegatee from publishing historic notes on the delegator's behalf.
2. Query strings should include a `created_at` ***before*** condition that is not empty and is not some extremely distant time in the future. If delegations are not limited in time scope, they expose similar security risks to simply using the root key for authentication.
#### Example #### Example
@ -101,6 +103,8 @@ The event should be considered a valid delegation if the conditions are satisfie
Clients should display the delegated note as if it was published directly by the delegator (8e0d3d3e). Clients should display the delegated note as if it was published directly by the delegator (8e0d3d3e).
#### Relay & Client Querying Support #### Relay & Client Support
Relays should answer requests such as `["REQ", "", {"authors": ["A"]}]` by querying both the `pubkey` and delegation tags `[1]` value. Relays should answer requests such as `["REQ", "", {"authors": ["A"]}]` by querying both the `pubkey` and delegation tags `[1]` value.
Relays SHOULD allow the delegator (8e0d3d3e) to delete the events published by the delegatee (477318cf).

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@ -0,0 +1,54 @@
NIP-27
======
Text Note References
--------------------
`draft` `optional` `author:arthurfranca` `author:hodlbod` `author:fiatjaf`
This document standardizes the treatment given by clients of inline references of other events and profiles inside the `.content` of any event that has readable text in its `.content` (such as kinds 1 and 30023).
When creating an event, clients should include mentions to other profiles and to other events in the middle of the `.content` using [NIP-21](21.md) codes, such as `nostr:nprofile1qqsw3dy8cpu...6x2argwghx6egsqstvg`.
Including [NIP-10](10.md)-style tags (`["e", <hex-id>, <relay-url>, <marker>]`) for each reference is optional, clients should do it whenever they want the profile being mentioned to be notified of the mention, or when they want the referenced event to recognize their mention as a reply.
A reader client that receives an event with such `nostr:...` mentions in its `.content` can do any desired context augmentation (for example, linking to the profile or showing a preview of the mentioned event contents) it wants in the process. If turning such mentions into links, they could become internal links, [NIP-21](21.md) links or direct links to web clients that will handle these references.
---
## Example of a profile mention process
Suppose Bob is writing a note in a client that has search-and-autocomplete functionality for users that is triggered when they write the character `@`.
As Bob types `"hello @mat"` the client will prompt him to autocomplete with [mattn's profile](https://gateway.nostr.com/p/2c7cc62a697ea3a7826521f3fd34f0cb273693cbe5e9310f35449f43622a5cdc), showing a picture and name.
Bob presses "enter" and now he sees his typed note as `"hello @mattn"`, `@mattn` is highlighted, indicating that it is a mention. Internally, however, the event looks like this:
```json
{
"content": "hello nostr:nprofile1qqszclxx9f5haga8sfjjrulaxncvkfekj097t6f3pu65f86rvg49ehqj6f9dh",
"created_at": 1679790774,
"id": "f39e9b451a73d62abc5016cffdd294b1a904e2f34536a208874fe5e22bbd47cf",
"kind": 1,
"pubkey": "79be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798",
"sig": "f8c8bab1b90cc3d2ae1ad999e6af8af449ad8bb4edf64807386493163e29162b5852a796a8f474d6b1001cddbaac0de4392838574f5366f03cc94cf5dfb43f4d",
"tags": [
[
"p",
"2c7cc62a697ea3a7826521f3fd34f0cb273693cbe5e9310f35449f43622a5cdc"
]
]
}
```
(Alternatively, the mention could have been a `nostr:npub1...` URL.)
After Bob publishes this event and Carol sees it, her client will initially display the `.content` as it is, but later it will parse the `.content` and see that there is a `nostr:` URL in there, decode it, extract the public key from it (and possibly relay hints), fetch that profile from its internal database or relays, then replace the full URL with the name `@mattn`, with a link to the internal page view for that profile.
## Verbose and probably unnecessary considerations
- The example above was very concrete, but it doesn't mean all clients have to implement the same flow. There could be clients that do not support autocomplete at all, so they just allow users to paste raw [NIP-19](19.md) codes into the body of text, then prefix these with `nostr:` before publishing the event.
- The flow for referencing other events is similar: a user could paste a `note1...` or `nevent1...` code and the client will turn that into a `nostr:note1...` or `nostr:nevent1...` URL. Then upon reading such references the client may show the referenced note in a preview box or something like that -- or nothing at all.
- Other display procedures can be employed: for example, if a client that is designed for dealing with only `kind:1` text notes sees, for example, a [`kind:30023`](23.md) `nostr:naddr1...` URL reference in the `.content`, it can, for example, decide to turn that into a link to some hardcoded webapp capable of displaying such events.
- Clients may give the user the option to include or not include tags for mentioned events or profiles. If someone wants to mention `mattn` without notifying them, but still have a nice augmentable/clickable link to their profile inside their note, they can instruct their client to _not_ create a `["p", ...]` tag for that specific mention.
- In the same way, if someone wants to reference another note but their reference is not meant to show up along other replies to that same note, their client can choose to not include a corresponding `["e", ...]` tag for any given `nostr:nevent1...` URL inside `.content`. Clients may decide to expose these advanced functionalities to users or be more opinionated about things.

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@ -37,7 +37,7 @@ In the channel creation `content` field, Client SHOULD include basic channel met
Update a channel's public metadata. Update a channel's public metadata.
Clients and relays SHOULD handle kind 41 events similar to kind 0 `metadata` events. Clients and relays SHOULD handle kind 41 events similar to kind 33 replaceable events, where the information is used to update the metadata, without modifying the event id for the channel. Only the most recent kind 41 is needed to be stored.
Clients SHOULD ignore kind 41s from pubkeys other than the kind 40 pubkey. Clients SHOULD ignore kind 41s from pubkeys other than the kind 40 pubkey.

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NIP-30
======
Custom Emoji
------------
`draft` `optional` `author:alexgleason`
Custom emoji may be added to **kind 0** and **kind 1** events by including one or more `"emoji"` tags, in the form:
```
["emoji", <shortcode>, <image-url>]
```
Where:
- `<shortcode>` is a name given for the emoji, which MUST be comprised of only alphanumeric characters and underscores.
- `<image-url>` is a URL to the corresponding image file of the emoji.
For each emoji tag, clients should parse emoji shortcodes (aka "emojify") like `:shortcode:` in the event to display custom emoji.
Clients may allow users to add custom emoji to an event by including `:shortcode:` identifier in the event, and adding the relevant `"emoji"` tags.
### Kind 0 events
In kind 0 events, the `name` and `about` fields should be emojified.
```json
{
"kind": 0,
"content": "{\"name\":\"Alex Gleason :soapbox:\"}",
"tags": [
["emoji", "soapbox", "https://gleasonator.com/emoji/Gleasonator/soapbox.png"]
],
"pubkey": "79c2cae114ea28a981e7559b4fe7854a473521a8d22a66bbab9fa248eb820ff6",
"created_at": 1682790000
}
```
### Kind 1 events
In kind 1 events, the `content` should be emojified.
```json
{
"kind": 1,
"content": "Hello :gleasonator: 😂 :ablobcatrainbow: :disputed: yolo",
"tags": [
["emoji", "ablobcatrainbow", "https://gleasonator.com/emoji/blobcat/ablobcatrainbow.png"],
["emoji", "disputed", "https://gleasonator.com/emoji/Fun/disputed.png"],
["emoji", "gleasonator", "https://gleasonator.com/emoji/Gleasonator/gleasonator.png"]
],
"pubkey": "79c2cae114ea28a981e7559b4fe7854a473521a8d22a66bbab9fa248eb820ff6",
"created_at": 1682630000
}
```

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NIP-31
======
Dealing with unknown event kinds
--------------------------------
`draft` `optional` `author:pablof7z` `author:fiatjaf`
When creating a new custom event kind that is part of a custom protocol and isn't meant to be read as text (like `kind:1`), clients should use an `alt` tag to write a short human-readable plaintext summary of what that event is about.
The intent is that social clients, used to display only `kind:1` notes, can still show something in case a custom event pops up in their timelines. The content of the `alt` tag should provide enough context for a user that doesn't know anything about this event kind to understand what it is.
These clients that only know `kind:1` are not expected to ask relays for events of different kinds, but users could still reference these weird events on their notes, and without proper context these could be nonsensical notes. Having the fallback text makes that situation much better -- even if only for making the user aware that they should try to view that custom event elsewhere.
`kind:1`-centric clients can make interacting with these event kinds more functional by supporting [NIP-89](https://github.com/nostr-protocol/nips/blob/master/89.md).

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NIP-32
======
Labeling
---------
`draft` `optional` `author:staab` `author:gruruya` `author:s3x-jay`
A label is a `kind 1985` event that is used to label other entities. This supports a number of use cases, from distributed moderation and content recommendations to reviews and ratings.
Label Target
----
The label event MUST include one or more tags representing the object or objects being
labeled: `e`, `p`, `a`, `r`, or `t` tags. This allows for labeling of events, people, relays,
or topics respectively. As with NIP-01, a relay hint SHOULD be included when using `e` and
`p` tags.
Label Tag
----
This NIP introduces a new tag `l` which denotes a label, and a new `L` tag which denotes a label namespace.
A label MUST include a mark matching an `L` tag. `L` tags refer to a tag type within nostr, or a nomenclature
external to nostr defined either formally or by convention. Any string can be a namespace, but publishers SHOULD
ensure they are unambiguous by using a well-defined namespace (such as an ISO standard) or reverse domain name notation.
Namespaces starting with `#` indicate that the label target should be associated with the label's value.
This is a way of attaching standard nostr tags to events, pubkeys, relays, urls, etc.
Some examples:
- `["l", "footstr", "#t"]` - the publisher thinks the given entity should have the `footstr` topic applied.
- `["l", "<pubkey>", "#p"]` - the publisher thinks the given entity is related to `<pubkey>`
- `["l", "IT-MI", "ISO-3166-2"]` - Milano, Italy using ISO 3166-2.
- `["l", "VI-hum", "com.example.ontology"]` - Violence toward a human being as defined by ontology.example.com.
`L` tags containing the label namespaces MUST be included in order to support searching by
namespace rather than by a specific tag. The special `ugc` ("user generated content") namespace
MAY be used when the label content is provided by an end user.
`l` and `L` tags MAY be added to other event kinds to support self-reporting. For events
with a kind other than 1985, labels refer to the event itself.
Label Annotations
-----
A label tag MAY include a 4th positional element detailing extra metadata about the label in question. This string
should be a json-encoded object. Any key MAY be used, but the following are recommended:
- `quality` may have a value of 0 to 1. This allows for an absolute, granular scale that can be represented in any way (5 stars, color scale, etc).
- `confidence` may have a value of 0 to 1. This indicates the certainty which the author has about their rating.
- `context` may be an array of urls (including NIP-21 urls) indicating other context that should be considered when interpreting labels.
Content
-------
Labels should be short, meaningful strings. Longer discussions, such as for a review, or an
explanation of why something was labeled the way it was, should go in the event's `content` field.
Example events
--------------
A suggestion that multiple pubkeys be associated with the `permies` topic.
```json
{
"kind": 1985,
"tags": [
["L", "#t"],
["l", "permies", "#t"],
["p", <pubkey1>, <relay_url>],
["p", <pubkey2>, <relay_url>]
],
"content": "",
...
}
```
A review of a relay.
```json
{
"kind": 1985,
"tags": [
["L", "com.example.ontology"],
["l", "relay/review", "com.example.ontology", "{\"quality\": 0.1}"],
["r", <relay_url>]
],
"content": "This relay is full of mean people.",
...
}
```
Publishers can self-label by adding `l` tags to their own non-1985 events.
```json
{
"kind": 1,
"tags": [
["L", "com.example.ontology"],
["l", "IL-frd", "com.example.ontology"]
],
"content": "Send me 100 sats and I'll send you 200 back",
...
}
```
Other Notes
-----------
When using this NIP to bulk-label many targets at once, events may be deleted and a replacement
may be published. We have opted not to use parameterizable/replaceable events for this due to the
complexity in coming up with a standard `d` tag. In order to avoid ambiguity when querying,
publishers SHOULD limit labeling events to a single namespace.
Before creating a vocabulary, explore how your use case may have already been designed and
imitate that design if possible. Reverse domain name notation is encouraged to avoid
namespace clashes, but for the sake of interoperability all namespaces should be
considered open for public use, and not proprietary. In other words, if there is a
namespace that fits your use case, use it even if it points to someone else's domain name.
Vocabularies MAY choose to fully qualify all labels within a namespace (for example,
`["l", "com.example.vocabulary:my-label"]`. This may be preferred when defining more
formal vocabularies that should not be confused with another namespace when querying
without an `L` tag. For these vocabularies, all labels SHOULD include the namespace
(rather than mixing qualified and unqualified labels).

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@ -4,48 +4,6 @@ NIP-33
Parameterized Replaceable Events Parameterized Replaceable Events
-------------------------------- --------------------------------
`draft` `optional` `author:Semisol` `author:Kukks` `author:Cameri` `author:Giszmo` `final` `mandatory` `author:Semisol` `author:Kukks` `author:Cameri` `author:Giszmo`
This NIP adds a new event range that allows for replacement of events that have the same `d` tag and kind unlike NIP-16 which only replaced by kind. Moved to [NIP-01](01.md).
Implementation
--------------
The value of a tag is defined as the first parameter of a tag after the tag name.
A *parameterized replaceable event* is defined as an event with a kind `30000 <= n < 40000`.
Upon a parameterized replaceable event with a newer timestamp than the currently known latest
replaceable event with the same kind and first `d` tag value being received, the old event
SHOULD be discarded and replaced with the newer event.
A missing or a `d` tag with no value should be interpreted equivalent to a `d` tag with the
value as an empty string. Events from the same author with any of the following `tags`
replace each other:
* `"tags":[["d",""]]`
* `"tags":[]`: implicit `d` tag with empty value
* `"tags":[["d"]]`: implicit empty value `""`
* `"tags":[["d",""],["d","not empty"]]`: only first `d` tag is considered
* `"tags":[["d"],["d","some value"]]`: only first `d` tag is considered
* `"tags":[["e"]]`: same as no tags
* `"tags":[["d","","1"]]`: only the first value is considered (`""`)
Clients SHOULD NOT use `d` tags with multiple values and SHOULD include the `d` tag even if it has no value to allow querying using the `#d` filter.
Referencing and tagging
-----------------------
Normally (as per NIP-01, NIP-12) the `"p"` tag is used for referencing public keys and the
`"e"` tag for referencing event ids and the `note`, `npub`, `nprofile` or `nevent` are their
equivalents for event tags (i.e. an `nprofile` is generally translated into a tag
`["p", "<event hex id>", "<relay url>"]`).
To support linking to parameterized replaceable events, the `naddr` code is introduced on
NIP-19. It includes the public key of the event author and the `d` tag (and relays) such that
the referenced combination of public key and `d` tag can be found.
The equivalent in `tags` to the `naddr` code is the tag `"a"`, comprised of `["a", "<kind>:<pubkey>:<d-identifier>", "<relay url>"]`.
Client Behavior
---------------
Clients SHOULD use the `supported_nips` field to learn if a relay supports this NIP.
Clients MAY send parameterized replaceable events to relays that may not support this NIP, and clients querying SHOULD be prepared for the relay to send multiple events and should use the latest one and are recommended to send a `#d` tag filter. Clients should account for the fact that missing `d` tags or ones with no value are not returned in tag filters, and are recommended to always include a `d` tag with a value.

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@ -9,6 +9,9 @@ Sensitive Content / Content Warning
The `content-warning` tag enables users to specify if the event's content needs to be approved by readers to be shown. The `content-warning` tag enables users to specify if the event's content needs to be approved by readers to be shown.
Clients can hide the content until the user acts on it. Clients can hide the content until the user acts on it.
`l` and `L` tags MAY be also be used as defined in [NIP-32](32.md) with the `content-warning` or other namespace to support
further qualification and querying.
#### Spec #### Spec
``` ```
@ -26,6 +29,10 @@ options:
"kind": 1, "kind": 1,
"tags": [ "tags": [
["t", "hastag"], ["t", "hastag"],
["L", "content-warning"],
["l", "reason", "content-warning"],
["L", "social.nos.ontology"],
["l", "NS-nud", "social.nos.ontology"],
["content-warning", "reason"] /* reason is optional */ ["content-warning", "reason"] /* reason is optional */
], ],
"content": "sensitive content with #hastag\n", "content": "sensitive content with #hastag\n",

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Relay Behavior Relay Behavior
-------------- --------------
Relays MAY NOT delete an expired message immediately on expiration and MAY persist them indefinitely. Relays MAY NOT delete expired messages immediately on expiration and MAY persist them indefinitely.
Relays SHOULD NOT send expired events to clients, even if they are stored. Relays SHOULD NOT send expired events to clients, even if they are stored.
Relays SHOULD drop any events that are published to them if they are expired. Relays SHOULD drop any events that are published to them if they are expired.
An expiration timestamp does not affect storage of ephemeral events. An expiration timestamp does not affect storage of ephemeral events.

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NIP-45
======
Event Counts
--------------
`draft` `optional` `author:staab`
Relays may support the verb `COUNT`, which provides a mechanism for obtaining event counts.
## Motivation
Some queries a client may want to execute against connected relays are prohibitively expensive, for example, in order to retrieve follower counts for a given pubkey, a client must query all kind-3 events referring to a given pubkey only to count them. The result may be cached, either by a client or by a separate indexing server as an alternative, but both options erode the decentralization of the network by creating a second-layer protocol on top of Nostr.
## Filters and return values
This NIP defines the verb `COUNT`, which accepts a subscription id and filters as specified in [NIP 01](01.md) for the verb `REQ`. Multiple filters are OR'd together and aggregated into a single count result.
```
["COUNT", <subscription_id>, <filters JSON>...]
```
Counts are returned using a `COUNT` response in the form `{"count": <integer>}`. Relays may use probabilistic counts to reduce compute requirements.
```
["COUNT", <subscription_id>, {"count": <integer>}]
```
Examples:
```
# Followers count
["COUNT", <subscription_id>, {"kinds": [3], "#p": [<pubkey>]}]
["COUNT", <subscription_id>, {"count": 238}]
# Count posts and reactions
["COUNT", <subscription_id>, {"kinds": [1, 7], "authors": [<pubkey>]}]
["COUNT", <subscription_id>, {"count": 5}]
```

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NIP-47
======
Nostr Wallet Connect
--------------------
`draft` `optional` `author:kiwiidb` `author:bumi` `author:semisol` `author:vitorpamplona`
## Rationale
This NIP describes a way for clients to access a remote Lightning wallet through a standardized protocol. Custodians may implement this, or the user may run a bridge that bridges their wallet/node and the Nostr Wallet Connect protocol.
## Terms
* **client**: Nostr app on any platform that wants to pay Lightning invoices.
* **user**: The person using the **client**, and want's to connect their wallet app to their **client**.
* **wallet service**: Nostr app that typically runs on an always-on computer (eg. in the cloud or on a Raspberry Pi). This app has access to the APIs of the wallets it serves.
## Theory of Operation
1. **Users** who which to use this NIP to send lightning payments to other nostr users must first acquire a special "connection" URI from their NIP-47 compliant wallet application. The wallet application may provide this URI using a QR screen, or a pasteable string, or some other means.
2. The **user** should then copy this URI into their **client(s)** by pasting, or scanning the QR, etc. The **client(s)** should save this URI and use it later whenever the **user** makes a payment. The **client** should then request an `info` (13194) event from the relay(s) specified in the URI. The **wallet service** will have sent that event to those relays earlier, and the relays will hold it as a replaceable event.
3. When the **user** initiates a payment their nostr **client** create a `pay_invoice` request, encrypts it using a token from the URI, and sends it (kind 23194) to the relay(s) specified in the connection URI. The **wallet service** will be listening on those relays and will decrypt the request and then contact the **user's** wallet application to send the payment. The **wallet service** will know how to talk to the wallet application because the connection URI specified relay(s) that have access to the wallet app API.
4. Once the payment is complete the **wallet service** will send an encrypted `response` (kind 23195) to the **user** over the relay(s) in the URI.
## Events
There are three event kinds:
- `NIP-47 info event`: 13194
- `NIP-47 request`: 23194
- `NIP-47 response`: 23195
The info event should be a replaceable event that is published by the **wallet service** on the relay to indicate which commands it supports. The content should be
a plaintext string with the supported commands, space-separated, eg. `pay_invoice get_balance`. Only the `pay_invoice` command is described in this NIP, but other commands might be defined in different NIPs.
Both the request and response events SHOULD contain one `p` tag, containing the public key of the **wallet service** if this is a request, and the public key of the **user** if this is a response. The response event SHOULD contain an `e` tag with the id of the request event it is responding to.
The content of requests and responses is encrypted with [NIP04](https://github.com/nostr-protocol/nips/blob/master/04.md), and is a JSON-RPCish object with a semi-fixed structure:
Request:
```jsonc
{
"method": "pay_invoice", // method, string
"params": { // params, object
"invoice": "lnbc50n1..." // command-related data
}
}
```
Response:
```jsonc
{
"result_type": "pay_invoice", //indicates the structure of the result field
"error": { //object, non-null in case of error
"code": "UNAUTHORIZED", //string error code, see below
"message": "human readable error message"
},
"result": { // result, object. null in case of error.
"preimage": "0123456789abcdef..." // command-related data
}
}
```
The `result_type` field MUST contain the name of the method that this event is responding to.
The `error` field MUST contain a `message` field with a human readable error message and a `code` field with the error code if the command was not successful.
If the command was successful, the `error` field must be null.
### Error codes
- `RATE_LIMITED`: The client is sending commands too fast. It should retry in a few seconds.
- `NOT_IMPLEMENTED`: The command is not known or is intentionally not implemented.
- `INSUFFICIENT_BALANCE`: The wallet does not have enough funds to cover a fee reserve or the payment amount.
- `QUOTA_EXCEEDED`: The wallet has exceeded its spending quota.
- `RESTRICTED`: This public key is not allowed to do this operation.
- `UNAUTHORIZED`: This public key has no wallet connected.
- `INTERNAL`: An internal error.
- `OTHER`: Other error.
## Nostr Wallet Connect URI
**client** discovers **wallet service** by scanning a QR code, handling a deeplink or pasting in a URI.
The **wallet service** generates this connection URI with protocol `nostr+walletconnect:` and base path it's hex-encoded `pubkey` with the following query string parameters:
- `relay` Required. URL of the relay where the **wallet service** is connected and will be listening for events. May be more than one.
- `secret` Required. 32-byte randomly generated hex encoded string. The **client** MUST use this to sign events and encrypt payloads when communicating with the **wallet service**.
- Authorization does not require passing keys back and forth.
- The user can have different keys for different applications. Keys can be revoked and created at will and have arbitrary constraints (eg. budgets).
- The key is harder to leak since it is not shown to the user and backed up.
- It improves privacy because the user's main key would not be linked to their payments.
- `lud16` Recommended. A lightning address that clients can use to automatically setup the `lud16` field on the user's profile if they have none configured.
The **client** should then store this connection and use it when the user wants to perform actions like paying an invoice. Due to this NIP using ephemeral events, it is recommended to pick relays that do not close connections on inactivity to not drop events.
### Example connection string
```sh
nostr+walletconnect:b889ff5b1513b641e2a139f661a661364979c5beee91842f8f0ef42ab558e9d4?relay=wss%3A%2F%2Frelay.damus.io&secret=71a8c14c1407c113601079c4302dab36460f0ccd0ad506f1f2dc73b5100e4f3c
```
## Commands
### `pay_invoice`
Description: Requests payment of an invoice.
Request:
```jsonc
{
"method": "pay_invoice",
"params": {
"invoice": "lnbc50n1..." // bolt11 invoice
}
}
```
Response:
```jsonc
{
"result_type": "pay_invoice",
"result": {
"preimage": "0123456789abcdef..." // preimage of the payment
}
}
```
Errors:
- `PAYMENT_FAILED`: The payment failed. This may be due to a timeout, exhausting all routes, insufficient capacity or similar.
## Example pay invoice flow
0. The user scans the QR code generated by the **wallet service** with their **client** application, they follow a `nostr+walletconnect:` deeplink or configure the connection details manually.
1. **client** sends an event to the **wallet service** service with kind `23194`. The content is a `pay_invoice` request. The private key is the secret from the connection string above.
2. **wallet service** verifies that the author's key is authorized to perform the payment, decrypts the payload and sends the payment.
3. **wallet service** responds to the event by sending an event with kind `23195` and content being a response either containing an error message or a preimage.
## Using a dedicated relay
This NIP does not specify any requirements on the type of relays used. However, if the user is using a custodial service it might make sense to use a relay that is hosted by the custodial service. The relay may then enforce authentication to prevent metadata leaks. Not depending on a 3rd party relay would also improve reliability in this case.

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NIP-48
======
Proxy Tags
----------
`draft` `optional` `author:alexgleason`
Nostr events bridged from other protocols such as ActivityPub can link back to the source object by including a `"proxy"` tag, in the form:
```
["proxy", <id>, <protocol>]
```
Where:
- `<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.
- `<protocol>` is the name of the protocol, e.g. `"activitypub"`.
Clients may use this information to reconcile duplicated content bridged from other protocols, or to display a link to the source object.
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.
### Supported protocols
This list may be extended in the future.
| Protocol | ID format | Example |
| -------- | --------- | ------- |
| `activitypub` | URL | `https://gleasonator.com/objects/9f524868-c1a0-4ee7-ad51-aaa23d68b526` |
| `atproto` | AT URI | `at://did:plc:zhbjlbmir5dganqhueg7y4i3/app.bsky.feed.post/3jt5hlibeol2i` |
| `rss` | URL with guid fragment | `https://soapbox.pub/rss/feed.xml#https%3A%2F%2Fsoapbox.pub%2Fblog%2Fmostr-fediverse-nostr-bridge` |
| `web` | URL | `https://twitter.com/jack/status/20` |
### Examples
ActivityPub object:
```json
{
"kind": 1,
"content": "I'm vegan btw",
"tags": [
[
"proxy",
"https://gleasonator.com/objects/8f6fac53-4f66-4c6e-ac7d-92e5e78c3e79",
"activitypub"
]
],
"pubkey": "79c2cae114ea28a981e7559b4fe7854a473521a8d22a66bbab9fa248eb820ff6",
"created_at": 1691091365,
"id": "55920b758b9c7b17854b6e3d44e6a02a83d1cb49e1227e75a30426dea94d4cb2",
"sig": "a72f12c08f18e85d98fb92ae89e2fe63e48b8864c5e10fbdd5335f3c9f936397a6b0a7350efe251f8168b1601d7012d4a6d0ee6eec958067cf22a14f5a5ea579"
}
```
### See also
- [FEP-fffd: Proxy Objects](https://codeberg.org/fediverse/fep/src/branch/main/fep/fffd/fep-fffd.md)
- [Mostr bridge](https://mostr.pub/)

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@ -2,15 +2,13 @@ NIP-51
====== ======
Lists Lists
------------------------- -----
`draft` `optional` `author:fiatjaf` `author:arcbtc` `author:monlovesmango` `author:eskema` `depends:33` `draft` `optional` `author:fiatjaf` `author:arcbtc` `author:monlovesmango` `author:eskema`
A "list" event is defined as having a list of public and/or private tags. Public tags will be listed in the event `tags`. Private tags will be encrypted in the event `content`. Encryption for private tags will use [NIP-04 - Encrypted Direct Message](04.md) encryption, using the list author's private and public key for the shared secret. A distinct event kind should be used for each list type created. A "list" event is defined as having a list of public and/or private tags. Public tags will be listed in the event `tags`. Private tags will be encrypted in the event `content`. Encryption for private tags will use [NIP-04 - Encrypted Direct Message](04.md) encryption, using the list author's private and public key for the shared secret. A distinct event kind should be used for each list type created.
If a list type should only be defined once per user (like the 'Mute' list), the list type's events should follow the specification for [NIP-16 - Replaceable Events](16.md). These lists may be referred to as 'replaceable lists'. If a list should only be defined once per user (like the "mute" list) the list is declared as a _replaceable event_. These lists may be referred to as "replaceable lists". Otherwise, the list is a _parameterized replaceable event_ and the list name will be used as the `d` tag. These lists may be referred to as "parameterized replaceable lists".
Otherwise the list type's events should follow the specification for [NIP-33 - Parameterized Replaceable Events](33.md), where the list name will be used as the 'd' parameter. These lists may be referred to as 'parameterized replaceable lists'.
## Replaceable List Event Example ## Replaceable List Event Example
@ -97,11 +95,11 @@ Then the user would create a 'Categorized People' list event like below:
### Mute List ### Mute List
An event with kind `10000` is defined as a replaceable list event for listing content a user wants to mute. Any standarized tag can be included in a Mute List. An event with kind `10000` is defined as a replaceable list event for listing content a user wants to mute. Any standardized tag can be included in a Mute List.
### Pin List ### Pin List
An event with kind `10001` is defined as a replaceable list event for listing content a user wants to pin. Any standarized tag can be included in a Pin List. An event with kind `10001` is defined as a replaceable list event for listing content a user wants to pin. Any standardized tag can be included in a Pin List.
### Categorized People List ### Categorized People List
@ -109,4 +107,4 @@ An event with kind `30000` is defined as a parameterized replaceable list event
### Categorized Bookmarks List ### Categorized Bookmarks List
An event with kind `30001` is defined as a parameterized replaceable list event for categorizing bookmarks. The 'd' parameter for this event holds the category name of the list. Any standarized tag can be included in a Categorized Bookmarks List. An event with kind `30001` is defined as a parameterized replaceable list event for categorizing bookmarks. The 'd' parameter for this event holds the category name of the list. Any standardized tag can be included in a Categorized Bookmarks List.

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NIP-52
======
Calendar Events
---------------
`draft` `optional` `author:tyiu`
This specification defines calendar events representing an occurrence at a specific moment or between moments. These calendar events are _parameterized replaceable_ and deletable per [NIP-09](09.md).
Unlike the term `calendar event` specific to this NIP, the term `event` is used broadly in all the NIPs to describe any Nostr event. The distinction is being made here to discern between the two terms.
## Calendar Events
There are two types of calendar events represented by different kinds: date-based and time-based calendar events. Calendar events are not required to be part of a [calendar](#calendar).
### Date-Based Calendar Event
This kind of calendar event starts on a date and ends before a different date in the future. Its use is appropriate for all-day or multi-day events where time and time zone hold no significance. e.g., anniversary, public holidays, vacation days.
#### Format
The format uses a parameterized replaceable event kind `31922`.
The `.content` of these events is optional and should be a detailed description of the calendar event.
The list of tags are as follows:
* `d` (required) universally unique identifier (UUID). Generated by the client creating the calendar event.
* `name` (required) name of the calendar event
* `start` (required) inclusive start date in ISO 8601 format (YYYY-MM-DD). Must be less than `end`, if it exists.
* `end` (optional) exclusive end date in ISO 8601 format (YYYY-MM-DD). If omitted, the calendar event ends on the same date as `start`.
* `location` (optional) location of the calendar event. e.g. address, GPS coordinates, meeting room name, link to video call
* `g` (optional) [geohash](https://en.wikipedia.org/wiki/Geohash) to associate calendar event with a searchable physical location as suggested as an example by [NIP-12](12.md)
* `p` (optional, repeated) 32-bytes hex pubkey of a participant, optional recommended relay URL, and participant's role in the meeting
* `t` (optional, repeated) hashtag to categorize calendar event
* `r` (optional, repeated) references / links to web pages, documents, video calls, recorded videos, etc.
```json
{
"id": <32-bytes lowercase hex-encoded SHA-256 of the the serialized event data>,
"pubkey": <32-bytes lowercase hex-encoded public key of the event creator>,
"created_at": <Unix timestamp in seconds>,
"kind": "31922",
"content": "<description of calendar event>",
"tags": [
["d", "<UUID>"],
["name", "<name of calendar event>"],
// Dates
["start", "<YYYY-MM-DD>"],
["end", "<YYYY-MM-DD>"],
// Location
["location", "<location>"],
["g", "<geohash>"],
// Participants
["p", "<32-bytes hex of a pubkey>", "<optional recommended relay URL>", "<role>"],
["p", "<32-bytes hex of a pubkey>", "<optional recommended relay URL>", "<role>"],
// Hashtags
["t", "<tag>"],
["t", "<tag>"],
// Reference links
["r", "<url>"],
["r", "<url>"]
]
}
```
### Time-Based Calendar Event
This kind of calendar event spans between a start time and end time.
#### Format
The format uses a parameterized replaceable event kind `31923`.
The `.content` of these events is optional and should be a detailed description of the calendar event.
The list of tags are as follows:
* `d` (required) universally unique identifier (UUID). Generated by the client creating the calendar event.
* `name` (required) name of the calendar event
* `start` (required) inclusive start Unix timestamp in seconds. Must be less than `end`, if it exists.
* `end` (optional) exclusive end Unix timestamp in seconds. If omitted, the calendar event ends instantaneously.
* `start_tzid` (optional) time zone of the start timestamp, as defined by the IANA Time Zone Database. e.g., `America/Costa_Rica`
* `end_tzid` (optional) time zone of the end timestamp, as defined by the IANA Time Zone Database. e.g., `America/Costa_Rica`. If omitted and `start_tzid` is provided, the time zone of the end timestamp is the same as the start timestamp.
* `location` (optional) location of the calendar event. e.g. address, GPS coordinates, meeting room name, link to video call
* `g` (optional) [geohash](https://en.wikipedia.org/wiki/Geohash) to associate calendar event with a searchable physical location as suggested as an example by [NIP-12](12.md)
* `p` (optional, repeated) 32-bytes hex pubkey of a participant, optional recommended relay URL, and participant's role in the meeting
* `t` (optional, repeated) hashtag to categorize calendar event
* `r` (optional, repeated) references / links to web pages, documents, video calls, recorded videos, etc.
```json
{
"id": <32-bytes lowercase hex-encoded SHA-256 of the the serialized event data>,
"pubkey": <32-bytes lowercase hex-encoded public key of the event creator>,
"created_at": <Unix timestamp in seconds>,
"kind": "31923",
"content": "<description of calendar event>",
"tags": [
["d", "<UUID>"],
["name", "<name of calendar event>"],
// Timestamps
["start", "<Unix timestamp in seconds>"],
["end", "<Unix timestamp in seconds>"],
["start_tzid", "<IANA Time Zone Database identifier>"],
["end_tzid", "<IANA Time Zone Database identifier>"],
// Location
["location", "<location>"],
["g", "<geohash>"],
// Participants
["p", "<32-bytes hex of a pubkey>", "<optional recommended relay URL>", "<role>"],
["p", "<32-bytes hex of a pubkey>", "<optional recommended relay URL>", "<role>"],
// Hashtags
["t", "<tag>"],
["t", "<tag>"],
// Reference links
["r", "<url>"],
["r", "<url>"]
]
}
```
## Calendar
A calendar is a collection of calendar events, represented as a custom replaceable list event using kind `31924`. A user can have multiple calendars. One may create a calendar to segment calendar events for specific purposes. e.g., personal, work, travel, meetups, and conferences.
### Format
The format uses a custom replaceable list of kind `31924` with a list of tags as described below:
* `d` (required) calendar name
* `a` (repeated) reference tag to kind `31922` or `31923` calendar event being responded to
```json
{
"kind": 31924,
"tags": [
["d", "<calendar name>"],
["a", "<31922 or 31923>:<calendar event author pubkey>:<d-identifier of calendar event>", "<optional relay url>"],
["a", "<31922 or 31923>:<calendar event author pubkey>:<d-identifier of calendar event>", "<optional relay url>"]
]
}
```
## Calendar Event RSVP
A calendar event RSVP is a response to a calendar event to indicate a user's attendance intention.
If a calendar event tags a pubkey, that can be interpreted as the calendar event creator inviting that user to attend. Clients MAY choose to prompt the user to RSVP for the calendar event.
Any user may RSVP, even if they were not tagged on the calendar event. Clients MAY choose to prompt the calendar event creator to invite the user who RSVP'd. Clients also MAY choose to ignore these RSVPs.
This NIP is intentionally not defining who is authorized to attend a calendar event if the user who RSVP'd has not been tagged. It is up to the calendar event creator to determine the semantics.
This NIP is also intentionally not defining what happens if a calendar event changes after an RSVP is submitted.
### Format
The format uses a parameterized replaceable event kind `31925`.
The `.content` of these events is optional and should be a free-form note that adds more context to this calendar event response.
The list of tags are as follows:
* `a` (required) reference tag to kind `31922` or `31923` calendar event being responded to.
* `d` (required) universally unique identifier. Generated by the client creating the calendar event RSVP.
* `L` (required) label namespace of `status` per [NIP-32](32.md)
* `l` (required) label of `accepted`, `declined`, or `tentative` under the label namespace of `status` per [NIP-32](32.md). Determines attendance status to the referenced calendar event.
* `L` (optional) label namespace of `freebusy` per [NIP-32](32.md). Exists if and only if corresponding `l` tag under the same label namespace exists.
* `l` (optional) label of `free` or `busy` under the label namespace of `freebusy` per [NIP-32](32.md). Determines if the user would be free or busy for the duration of the calendar event. This tag must be omitted or ignored if the `status` label is set to `declined`. Exists if and only if corresponding `l` tag under the same label namespace exists.
```json
{
"id": <32-bytes lowercase hex-encoded SHA-256 of the the serialized event data>,
"pubkey": <32-bytes lowercase hex-encoded public key of the event creator>,
"created_at": <Unix timestamp in seconds>,
"kind": "31925",
"content": "<note>",
"tags": [
["a", "<31922 or 31923>:<calendar event author pubkey>:<d-identifier of calendar event>", "<optional relay url>"],
["d", "<UUID>"],
["L", "status"],
["l", "<accepted/declined/tentative>", "status"],
["L", "freebusy"],
["l", "<free/busy>", "freebusy"]
]
}
```
## Unsolved Limitations
* No private events
## Intentionally Unsupported Scenarios
### Recurring Calendar Events
Recurring calendar events come with a lot of complexity, making it difficult for software and humans to deal with. This complexity includes time zone differences between invitees, daylight savings, leap years, multiple calendar systems, one-off changes in schedule or other metadata, etc.
This NIP intentionally omits support for recurring calendar events and pushes that complexity up to clients to manually implement if they desire. i.e., individual calendar events with duplicated metadata represent recurring calendar events.

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NIP-53
======
Live Activities
---------------
`draft` `optional` `author:vitorpamplona` `author:v0l`
## Abstract
Service providers want to offer live activities to the Nostr network in such a way that participants can easily logged and queried by clients. This NIP describes a general framework to advertise the involvement of pubkeys in such live activities.
# Live Event
A special event with `kind:30311` "Live Event" is defined as a _parameterized replaceable event_ of public `p` tags. Each `p` tag SHOULD have a **displayable** marker name for the current role (e.g. `Host`, `Speaker`, `Participant`) of the user in the event and the relay information MAY be empty. This event will be constantly updated as participants join and leave the activity.
For example:
```js
{
"kind": 30311,
"tags": [
["d", "<unique identifier>"],
["title", "<name of the event>"],
["summary", "<description>"],
["image", "<preview image url>"],
["t", "hashtag"]
["streaming", "<url>"],
["recording", "<url>"], // used to place the edited video once the activity is over
["starts", "<unix timestamp in seconds>"],
["ends", "<unix timestamp in seconds>"],
["status", "<planned, live, ended>"],
["current_participants", "<number>"],
["total_participants", "<number>"],
["p", "91cf9..4e5ca", "wss://provider1.com/", "Host", "<proof>"],
["p", "14aeb..8dad4", "wss://provider2.com/nostr", "Speaker"],
["p", "612ae..e610f", "ws://provider3.com/ws", "Participant"],
["relays", "wss://one.com", "wss://two.com", ...]
],
"content": "",
...other fields
}
```
A distinct `d` tag should be used for each activity. All other tags are optional.
Providers SHOULD keep the participant list small (e.g. under 1000 users) and, when limits are reached, Providers SHOULD select which participants get named in the event. Clients should not expect a comprehensive list. Once the activity ends, the event can be deleted or updated to summarize the activity and provide async content (e.g. recording of the event).
Clients are expected to subscribe to `kind:30311` events in general or for given follow lists and statuses. Clients MAY display participants' roles in activities as well as access points to join the activity.
Live Activity management clients are expected to constantly update `kind:30311` during the event. Clients MAY choose to consider `status=live` events after 1hr without any update as `ended`. The `starts` and `ends` timestamp SHOULD be updated when the status changes to and from `live`
The activity MUST be linked to using the [NIP-19](19.md) `naddr` code along with the `a` tag.
## Proof of Agreement to Participate
Event owners can add proof as the 5th term in each `p` tag to clarify the participant's agreement in joining the event. The proof is a signed SHA256 of the complete `a` Tag of the event (`kind:pubkey:dTag`) by each `p`'s private key, encoded in hex.
Clients MAY only display participants if the proof is available or MAY display participants as "invited" if the proof is not available.
This feature is important to avoid malicious event owners adding large account holders to the event, without their knowledge, to lure their followers into the malicious owner's trap.
# Live Chat Message
Event `kind:1311` is live chat's channel message. Clients MUST include the `a` tag of the activity with a `root` marker. Other Kind-1 tags such as `reply` and `mention` can also be used.
```js
{
"id": "<32-bytes lowercase hex-encoded SHA-256 of the the serialized event data>",
"pubkey": "<32-bytes lowercase hex-encoded public key of the event creator>",
"created_at": "<Unix timestamp in seconds>",
"kind": 1311,
"tags": [
["a", "30311:<Community event author pubkey>:<d-identifier of the community>", "<Optional relay url>", "root"],
],
"content": "Zaps to live streams is beautiful."
}
```
# Use Cases
Common use cases include meeting rooms/workshops, watch-together activities, or event spaces, such as [live.snort.social](https://live.snort.social) and [nostrnests.com](https://nostrnests.com).
# Example
Live Streaming
```json
{
"id": "57f28dbc264990e2c61e80a883862f7c114019804208b14da0bff81371e484d2",
"pubkey": "1597246ac22f7d1375041054f2a4986bd971d8d196d7997e48973263ac9879ec",
"created_at": 1687182672,
"kind": 30311,
"tags": [
["d", "demo-cf-stream"],
["title", "Adult Swim Metalocalypse"],
["summary", "Live stream from IPTV-ORG collection"],
["streaming", "https://adultswim-vodlive.cdn.turner.com/live/metalocalypse/stream.m3u8"],
["starts", "1687182672"]
["status", "live"],
["t", "animation"],
["t", "iptv"],
["image", "https://i.imgur.com/CaKq6Mt.png"]
],
"content": "",
"sig": "5bc7a60f5688effa5287244a24768cbe0dcd854436090abc3bef172f7f5db1410af4277508dbafc4f70a754a891c90ce3b966a7bc47e7c1eb71ff57640f3d389"
}
```
Live Streaming chat message
```json
{
"id": "97aa81798ee6c5637f7b21a411f89e10244e195aa91cb341bf49f718e36c8188",
"pubkey": "3f770d65d3a764a9c5cb503ae123e62ec7598ad035d836e2a810f3877a745b24",
"created_at": 1687286726,
"kind": 1311,
"tags": [
["a", "30311:1597246ac22f7d1375041054f2a4986bd971d8d196d7997e48973263ac9879ec:demo-cf-stream", "", "root"]
],
"content": "Zaps to live streams is beautiful.",
"sig": "997f62ddfc0827c121043074d50cfce7a528e978c575722748629a4137c45b75bdbc84170bedc723ef0a5a4c3daebf1fef2e93f5e2ddb98e5d685d022c30b622"
}
````

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@ -10,7 +10,7 @@ Reporting
A report is a `kind 1984` note that is used to report other notes for spam, A report is a `kind 1984` note that is used to report other notes for spam,
illegal and explicit content. illegal and explicit content.
The content MAY contain additional information submitted by the entity The `content` MAY contain additional information submitted by the entity
reporting the content. reporting the content.
Tags Tags
@ -32,6 +32,9 @@ being reported, which consists of the following report types:
Some report tags only make sense for profile reports, such as `impersonation` Some report tags only make sense for profile reports, such as `impersonation`
`l` and `L` tags MAY be also be used as defined in [NIP-32](32.md) to support
further qualification and querying.
Example events Example events
-------------- --------------
@ -39,7 +42,9 @@ Example events
{ {
"kind": 1984, "kind": 1984,
"tags": [ "tags": [
[ "p", <pubkey>, "nudity"] ["p", <pubkey>, "nudity"],
["L", "social.nos.ontology"],
["l", "NS-nud", "social.nos.ontology"]
], ],
"content": "", "content": "",
... ...
@ -58,10 +63,9 @@ Example events
{ {
"kind": 1984, "kind": 1984,
"tags": [ "tags": [
[ "p", <impersonator pubkey>, "impersonation"], ["p", <impersonator pubkey>, "impersonation"]
[ "p", <victim pubkey>]
], ],
"content": "Profile is imitating #[1]", "content": "Profile is impersonating nostr:<victim bech32 pubkey>",
... ...
} }
``` ```
@ -70,7 +74,7 @@ Client behavior
--------------- ---------------
Clients can use reports from friends to make moderation decisions if they Clients can use reports from friends to make moderation decisions if they
choose to. For instance, if 3+ of your friends report a profile as explicit, choose to. For instance, if 3+ of your friends report a profile for `nudity`,
clients can have an option to automatically blur photos from said account. clients can have an option to automatically blur photos from said account.

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@ -6,69 +6,139 @@ Lightning Zaps
`draft` `optional` `author:jb55` `author:kieran` `draft` `optional` `author:jb55` `author:kieran`
This NIP defines a new note type called a lightning zap of kind `9735`. These represent paid lightning invoice receipts sent by a lightning node called the `zapper`. We also define another note type of kind `9734` which are `zap request` notes, which will be described in this document. This NIP defines two new event types for recording lightning payments between users. `9734` is a `zap request`, representing a payer's request to a recipient's lightning wallet for an invoice. `9735` is a `zap receipt`, representing the confirmation by the recipient's lightning wallet that the invoice issued in response to a `zap request` has been paid.
Having lightning receipts on nostr allows clients to display lightning payments from entities on the network. These can be used for fun or for spam deterrence. Having lightning receipts on nostr allows clients to display lightning payments from entities on the network. These can be used for fun or for spam deterrence.
## Definitions
`zapper` - the lightning node or service that sends zap notes (kind `9735`)
`zap request` - a note of kind `9734` created by the person zapping
`zap invoice` - the bolt11 invoice fetched from a custom lnurl endpoint which contains a `zap request` note
## Protocol flow ## Protocol flow
### Client side 1. Client calculates a recipient's lnurl pay request url from the `zap` tag on the event being zapped (see Appendix G), or by decoding their lud06 or lud16 field on their profile according to the [lnurl specifications](https://github.com/lnurl/luds). The client MUST send a GET request to this url and parse the response. If `allowsNostr` exists and it is `true`, and if `nostrPubkey` exists and is a valid BIP 340 public key in hex, the client should associate this information with the user, along with the response's `callback`, `minSendable`, and `maxSendable` values.
2. Clients may choose to display a lightning zap button on each post or on a user's profile. If the user's lnurl pay request endpoint supports nostr, the client SHOULD use this NIP to request a `zap receipt` rather than a normal lnurl invoice.
3. When a user (the "sender") indicates they want to send a zap to another user (the "recipient"), the client should create a `zap request` event as described in Appendix A of this NIP and sign it.
4. Instead of publishing the `zap request`, the `9734` event should instead be sent to the `callback` url received from the lnurl pay endpoint for the recipient using a GET request. See Appendix B for details and an example.
5. The recipient's lnurl server will receive this `zap request` and validate it. See Appendix C for details on how to properly configure an lnurl server to support zaps, and Appendix D for details on how to validate the `nostr` query parameter.
6. If the `zap request` is valid, the server should fetch a description hash invoice where the description is this `zap request` note and this note only. No additional lnurl metadata is included in the description. This will be returned in the response according to [LUD06](https://github.com/lnurl/luds/blob/luds/06.md).
7. On receiving the invoice, the client MAY pay it or pass it to an app that can pay the invoice.
8. Once the invoice is paid, the recipient's lnurl server MUST generate a `zap receipt` as described in Appendix E, and publish it to the `relays` specified in the `zap request`.
9. Clients MAY fetch `zap receipt`s on posts and profiles, but MUST authorize their validity as described in Appendix F. If the `zap request` note contains a non-empty `content`, it may display a zap comment. Generally clients should show users the `zap request` note, and use the `zap receipt` to show "zap authorized by ..." but this is optional.
1. Calculate the lnurl pay request url for a user from the lud06 or lud16 field on their profile ## Reference and examples
2. Fetch the lnurl pay request static endpoint (`https://host.com/.well-known/lnurlp/user`) and gather the `allowsNostr` and `nostrPubkey` fields. If `allowsNostr` exists and it is `true`, and if `nostrPubkey` exists and is a valid BIP 340 public key, associate this information with the user. The `nostrPubkey` is the `zapper`'s pubkey, and it is used to authorize zaps sent to that user. ### Appendix A: Zap Request Event
3. Clients may choose to display a lightning zap button on each post or on the users profile, if the user's lnurl pay request endpoint supports nostr, the client SHOULD generate a `zap invoice` instead of a normal lnurl invoice. A `zap request` is an event of kind `9734` that is _not_ published to relays, but is instead sent to a recipient's lnurl pay `callback` url. This event's `content` MAY be an optional message to send along with the payment. The event MUST include the following tags:
4. To generate a `zap invoice`, call the `callback` url with `amount` set to the milli-satoshi amount value. A `nostr` querystring value MUST be set as well. It is a uri-encoded `zap request` note signed by the user's key. The `zap request` note contains an `e` tag of the note it is zapping, and a `p` tag of the target user's pubkey. The `e` tag is optional which allows profile tipping. An optional `a` tag allows tipping parameterized replaceable events such as NIP-23 long-form notes. The `zap request` note must also have a `relays` tag, which is gathered from the user's configured relays. The `zap request` note SHOULD contain an `amount` tag, which is the milli-satoshi value of the zap which clients SHOULD verify being equal to the amount of the invoice. The `content` MAY be an additional comment from the user which can be displayed when listing zaps on posts and profiles. - `relays` is a list of relays the recipient's wallet should publish its `zap receipt` to. Note that relays should not be nested in an additional list, but should be included as shown in the example below.
- `amount` is the amount in _millisats_ the sender intends to pay, formatted as a string. This is recommended, but optional.
- `lnurl` is the lnurl pay url of the recipient, encoded using bech32 with the prefix `lnurl`. This is recommended, but optional.
- `p` is the hex-encoded pubkey of the recipient.
5. Pay this invoice or pass it to an app that can pay the invoice. Once it's paid, a `zap note` will be created by the `zapper`. In addition, the event MAY include the following tags:
### LNURL Server side - `e` is an optional hex-encoded event id. Clients MUST include this if zapping an event rather than a person.
- `a` is an optional NIP-33 event coordinate that allows tipping parameterized replaceable events such as NIP-23 long-form notes.
Example:
```json
{
"kind": 9734,
"content": "Zap!",
"tags": [
["relays", "wss://nostr-pub.wellorder.com"],
["amount", "21000"],
["lnurl", "lnurl1dp68gurn8ghj7um5v93kketj9ehx2amn9uh8wetvdskkkmn0wahz7mrww4excup0dajx2mrv92x9xp"],
["p", "04c915daefee38317fa734444acee390a8269fe5810b2241e5e6dd343dfbecc9"],
["e", "9ae37aa68f48645127299e9453eb5d908a0cbb6058ff340d528ed4d37c8994fb"]
],
"pubkey": "97c70a44366a6535c145b333f973ea86dfdc2d7a99da618c40c64705ad98e322",
"created_at": 1679673265,
"id": "30efed56a035b2549fcaeec0bf2c1595f9a9b3bb4b1a38abaf8ee9041c4b7d93",
"sig": "f2cb581a84ed10e4dc84937bd98e27acac71ab057255f6aa8dfa561808c981fe8870f4a03c1e3666784d82a9c802d3704e174371aa13d63e2aeaf24ff5374d9d"
}
```
### Appendix B: Zap Request HTTP Request
A signed `zap request` event is not published, but is instead sent using a HTTP GET request to the recipient's `callback` url, which was provided by the recipient's lnurl pay endpoint. This request should have the following query parameters defined:
- `amount` is the amount in _millisats_ the sender intends to pay
- `nostr` is the `9734` `zap request` event, JSON encoded then URI encoded
- `lnurl` is the lnurl pay url of the recipient, encoded using bech32 with the prefix `lnurl`
This request should return a JSON response with a `pr` key, which is the invoice the sender must pay to finalize his zap. Here is an example flow:
```javascript
const senderPubkey // The sender's pubkey
const recipientPubkey = // The recipient's pubkey
const callback = // The callback received from the recipients lnurl pay endpoint
const lnurl = // The recipient's lightning address, encoded as a lnurl
const sats = 21
const amount = sats * 1000
const relays = ['wss://nostr-pub.wellorder.net']
const event = encodeURI(JSON.stringify(await signEvent({
kind: [9734],
content: "",
pubkey: senderPubkey,
created_at: Math.round(Date.now() / 1000),
tags: [
["relays", ...relays],
["amount", amount.toString()],
["lnurl", lnurl],
["p", recipientPubkey],
],
})))
const {pr: invoice} = await fetchJson(`${callback}?amount=${amount}&nostr=${event}&lnurl=${lnurl}`)
```
### Appendix C: LNURL Server Configuration
The lnurl server will need some additional pieces of information so that clients can know that zap invoices are supported: The lnurl server will need some additional pieces of information so that clients can know that zap invoices are supported:
1. Add a `nostrPubkey` to the lnurl-pay static endpoint `/.well-known/lnurlp/user`, where `nostrPubkey` is the nostr pubkey of the `zapper`, the entity that creates zap notes. Clients will use this to authorize zaps. 1. Add a `nostrPubkey` to the lnurl-pay static endpoint `/.well-known/lnurlp/<user>`, where `nostrPubkey` is the nostr pubkey your server will use to sign `zap receipt` events. Clients will use this to validate `zap receipt`s.
2. Add an `allowsNostr` field and set it to true. 2. Add an `allowsNostr` field and set it to true.
3. In the lnurl-pay callback URL, watch for a `nostr` querystring, where the contents of the note is a uri-encoded `zap request` JSON. ### Appendix D: LNURL Server Zap Request Validation
4. If present, the zap request note must be validated: When a client sends a `zap request` event to a server's lnurl-pay callback URL, there will be a `nostr` query parameter whose value is that event which is URI- and JSON-encoded. If present, the `zap request` event must be validated in the following ways:
a. It MUST have a valid nostr signature 1. It MUST have a valid nostr signature
2. It MUST have tags
3. It MUST have only one `p` tag
4. It MUST have 0 or 1 `e` tags
5. There should be a `relays` tag with the relays to send the `zap receipt` to.
6. If there is an `amount` tag, it MUST be equal to the `amount` query parameter.
7. If there is an `a` tag, it MUST be a valid NIP-33 event coordinate
b. It MUST have tags The event MUST then be stored for use later, when the invoice is paid.
c. It MUST have at least one p-tag ### Appendix E: Zap Receipt Event
d. It MUST have either 0 or 1 e-tag A `zap receipt` is created by a lightning node when an invoice generated by a `zap request` is paid. `Zap receipt`s are only created when the invoice description (committed to the description hash) contains a `zap request` note.
e. There should be a `relays` tag with the relays to send the `zap` note to. When receiving a payment, the following steps are executed:
f. If there is an `amount` tag, it MUST be equal to the `amount` query parameter. 1. Get the description for the invoice. This needs to be saved somewhere during the generation of the description hash invoice. It is saved automatically for you with CLN, which is the reference implementation used here.
2. Parse the bolt11 description as a JSON nostr event. This SHOULD be validated based on the requirements in Appendix D, either when it is received, or before the invoice is paid.
3. Create a nostr event of kind `9735` as described below, and publish it to the `relays` declared in the `zap request`.
g. If there is an `a` tag, it MUST be a valid NIP-33 event coordinate The following should be true of the `zap receipt` event:
5. If valid, fetch a description hash invoice where the description is this note and this note only. No additional lnurl metadata is included in the description. - The `content` SHOULD be empty.
- The `created_at` date SHOULD be set to the invoice `paid_at` date for idempotency.
- `tags` MUST include the `p` tag AND optional `e` tag from the `zap request`.
- The `zap receipt` MUST have a `bolt11` tag containing the description hash bolt11 invoice.
- The `zap receipt` MUST contain a `description` tag which is the JSON-encoded invoice description.
- `SHA256(description)` MUST match the description hash in the bolt11 invoice.
- The `zap receipt` MAY contain a `preimage` tag to match against the payment hash of the bolt11 invoice. This isn't really a payment proof, there is no real way to prove that the invoice is real or has been paid. You are trusting the author of the `zap receipt` for the legitimacy of the payment.
At this point, the lightning node is ready to send the zap note once payment is received. The `zap receipt` is not a proof of payment, all it proves is that some nostr user fetched an invoice. The existence of the `zap receipt` implies the invoice as paid, but it could be a lie given a rogue implementation.
## The zap note A reference implementation for a zap-enabled lnurl server can be found [here](https://github.com/jb55/cln-nostr-zapper).
Zap notes are created by a lightning node reacting to paid invoices. Zap notes are only created when the invoice description (committed to the description hash) contains a `zap request` note. Example `zap receipt`:
Example zap note:
```json ```json
{ {
@ -77,74 +147,41 @@ Example zap note:
"created_at": 1674164545, "created_at": 1674164545,
"kind": 9735, "kind": 9735,
"tags": [ "tags": [
[ ["p", "32e1827635450ebb3c5a7d12c1f8e7b2b514439ac10a67eef3d9fd9c5c68e245"],
"p", ["e", "3624762a1274dd9636e0c552b53086d70bc88c165bc4dc0f9e836a1eaf86c3b8"],
"32e1827635450ebb3c5a7d12c1f8e7b2b514439ac10a67eef3d9fd9c5c68e245" ["bolt11", "lnbc10u1p3unwfusp5t9r3yymhpfqculx78u027lxspgxcr2n2987mx2j55nnfs95nxnzqpp5jmrh92pfld78spqs78v9euf2385t83uvpwk9ldrlvf6ch7tpascqhp5zvkrmemgth3tufcvflmzjzfvjt023nazlhljz2n9hattj4f8jq8qxqyjw5qcqpjrzjqtc4fc44feggv7065fqe5m4ytjarg3repr5j9el35xhmtfexc42yczarjuqqfzqqqqqqqqlgqqqqqqgq9q9qxpqysgq079nkq507a5tw7xgttmj4u990j7wfggtrasah5gd4ywfr2pjcn29383tphp4t48gquelz9z78p4cq7ml3nrrphw5w6eckhjwmhezhnqpy6gyf0"],
], ["description", "{\"pubkey\":\"32e1827635450ebb3c5a7d12c1f8e7b2b514439ac10a67eef3d9fd9c5c68e245\",\"content\":\"\",\"id\":\"d9cc14d50fcb8c27539aacf776882942c1a11ea4472f8cdec1dea82fab66279d\",\"created_at\":1674164539,\"sig\":\"77127f636577e9029276be060332ea565deaf89ff215a494ccff16ae3f757065e2bc59b2e8c113dd407917a010b3abd36c8d7ad84c0e3ab7dab3a0b0caa9835d\",\"kind\":9734,\"tags\":[[\"e\",\"3624762a1274dd9636e0c552b53086d70bc88c165bc4dc0f9e836a1eaf86c3b8\"],[\"p\",\"32e1827635450ebb3c5a7d12c1f8e7b2b514439ac10a67eef3d9fd9c5c68e245\"],[\"relays\",\"wss://relay.damus.io\",\"wss://nostr-relay.wlvs.space\",\"wss://nostr.fmt.wiz.biz\",\"wss://relay.nostr.bg\",\"wss://nostr.oxtr.dev\",\"wss://nostr.v0l.io\",\"wss://brb.io\",\"wss://nostr.bitcoiner.social\",\"ws://monad.jb55.com:8080\",\"wss://relay.snort.social\"]]}"],
[ ["preimage", "5d006d2cf1e73c7148e7519a4c68adc81642ce0e25a432b2434c99f97344c15f"]
"e",
"3624762a1274dd9636e0c552b53086d70bc88c165bc4dc0f9e836a1eaf86c3b8"
],
[
"bolt11",
"lnbc10u1p3unwfusp5t9r3yymhpfqculx78u027lxspgxcr2n2987mx2j55nnfs95nxnzqpp5jmrh92pfld78spqs78v9euf2385t83uvpwk9ldrlvf6ch7tpascqhp5zvkrmemgth3tufcvflmzjzfvjt023nazlhljz2n9hattj4f8jq8qxqyjw5qcqpjrzjqtc4fc44feggv7065fqe5m4ytjarg3repr5j9el35xhmtfexc42yczarjuqqfzqqqqqqqqlgqqqqqqgq9q9qxpqysgq079nkq507a5tw7xgttmj4u990j7wfggtrasah5gd4ywfr2pjcn29383tphp4t48gquelz9z78p4cq7ml3nrrphw5w6eckhjwmhezhnqpy6gyf0"
],
[
"description",
"{\"pubkey\":\"32e1827635450ebb3c5a7d12c1f8e7b2b514439ac10a67eef3d9fd9c5c68e245\",\"content\":\"\",\"id\":\"d9cc14d50fcb8c27539aacf776882942c1a11ea4472f8cdec1dea82fab66279d\",\"created_at\":1674164539,\"sig\":\"77127f636577e9029276be060332ea565deaf89ff215a494ccff16ae3f757065e2bc59b2e8c113dd407917a010b3abd36c8d7ad84c0e3ab7dab3a0b0caa9835d\",\"kind\":9734,\"tags\":[[\"e\",\"3624762a1274dd9636e0c552b53086d70bc88c165bc4dc0f9e836a1eaf86c3b8\"],[\"p\",\"32e1827635450ebb3c5a7d12c1f8e7b2b514439ac10a67eef3d9fd9c5c68e245\"],[\"relays\",\"wss://relay.damus.io\",\"wss://nostr-relay.wlvs.space\",\"wss://nostr.fmt.wiz.biz\",\"wss://relay.nostr.bg\",\"wss://nostr.oxtr.dev\",\"wss://nostr.v0l.io\",\"wss://brb.io\",\"wss://nostr.bitcoiner.social\",\"ws://monad.jb55.com:8080\",\"wss://relay.snort.social\"]]}"
],
[
"preimage",
"5d006d2cf1e73c7148e7519a4c68adc81642ce0e25a432b2434c99f97344c15f"
]
], ],
"content": "", "content": "",
"sig": "b0a3c5c984ceb777ac455b2f659505df51585d5fd97a0ec1fdb5f3347d392080d4b420240434a3afd909207195dac1e2f7e3df26ba862a45afd8bfe101c2b1cc" "sig": "b0a3c5c984ceb777ac455b2f659505df51585d5fd97a0ec1fdb5f3347d392080d4b420240434a3afd909207195dac1e2f7e3df26ba862a45afd8bfe101c2b1cc"
} }
``` ```
* The zap note MUST have a `bolt11` tag containing the description hash bolt11 invoice. ### Appendix F: Validating Zap Receipts
* The zap note MUST contain a `description` tag which is the invoice description. A client can retrieve `zap receipt`s on events and pubkeys using a NIP-01 filter, for example `{"kinds": [9735], "#e": [...]}`. Zaps MUST be validated using the following steps:
* `SHA256(description)` MUST match the description hash in the bolt11 invoice. - The `zap receipt` event's `pubkey` MUST be the same as the recipient's lnurl provider's `nostrPubkey` (retrieved in step 1 of the protocol flow).
- The `invoiceAmount` contained in the `bolt11` tag of the `zap receipt` MUST equal the `amount` tag of the `zap request` (if present).
- The `lnurl` tag of the `zap request` (if present) SHOULD equal the recipient's `lnurl`.
* The zap note MAY contain a `preimage` to match against the payment hash of the bolt11 invoice. This isn't really a payment proof, there is no real way to prove that the invoice is real or has been paid. You are trusting the author of the zap note for the legitimacy of the payment. ### Appendix G: `zap` tag on other events
The zap note is not a proof of payment, all it proves is that some nostr user fetched an invoice. The existence of the zap note implies the invoice as paid, but it could be a lie given a rogue implementation. When an event includes one or more `zap` tags, clients wishing to zap it SHOULD calculate the lnurl pay request based on the tags value instead of the event author's profile field. The tag's second argument is the `hex` string of the receiver's pub key and the third argument is the relay to download the receiver's metadata (Kind-0). An optional fourth parameter specifies the weight (a generalization of a percentage) assigned to the respective receiver. Clients should parse all weights, calculate a sum, and then a percentage to each receiver. If weights are not present, CLIENTS should equally divide the zap amount to all receivers. If weights are only partially present, receivers without a weight should not be zapped (`weight = 0`).
```js
{
"tags": [
[ "zap", "82341f882b6eabcd2ba7f1ef90aad961cf074af15b9ef44a09f9d2a8fbfbe6a2", "wss://nostr.oxtr.dev", "1" ], // 25%
[ "zap", "fa984bd7dbb282f07e16e7ae87b26a2a7b9b90b7246a44771f0cf5ae58018f52", "wss://nostr.wine/", "1" ], // 25%
[ "zap", "460c25e682fda7832b52d1f22d3d22b3176d972f60dcdc3212ed8c92ef85065c", "wss://nos.lol/", "2" ] // 50%
]
}
```
### Creating a zap note Clients MAY display the zap split configuration in the note.
When receiving a payment, the following steps are executed:
1. Get the description for the invoice. This needs to be saved somewhere during the generation of the description hash invoice. It is saved automatically for you with CLN, which is the reference implementation used here.
2. Parse the bolt11 description as a JSON nostr note. You SHOULD check the signature of the parsed note to ensure that it is valid. This is the `zap request` note created by the entity who is zapping.
4. The note MUST have only one `p` tag
5. The note MUST have 0 or 1 `e` tag
6. Create a nostr note of kind `9735` that includes the `p` tag AND optional `e` tag. The content SHOULD be empty. The created_at date SHOULD be set to the invoice paid_at date for idempotency.
7. Send the note to the `relays` declared in the `zap request` note from the invoice description.
A reference implementation for the zapper is here: [zapper][zapper]
[zapper]: https://github.com/jb55/cln-nostr-zapper
## Client Behavior
Clients MAY fetch zap notes on posts and profiles:
`{"kinds": [9735], "#e": [...]}`
To authorize these notes, clients MUST fetch the `nostrPubkey` from the users configured lightning address or lnurl and ensure that the zaps to their posts were created by this pubkey. If clients don't do this, anyone could forge unauthorized zaps.
Once authorized, clients MAY tally zaps on posts, and list them on profiles. If the zap request note contains a non-empty `content`, it may display a zap comment. Generally clients should show users the `zap request` note, and use the `zap note` to show "zap authorized by ..." but this is optional.
## Future Work ## Future Work
Zaps can be extended to be more private by encrypting zap request notes to the target user, but for simplicity it has been left out of this initial draft. Zaps can be extended to be more private by encrypting `zap request` notes to the target user, but for simplicity it has been left out of this initial draft.

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@ -9,15 +9,9 @@ Badges
Three special events are used to define, award and display badges in Three special events are used to define, award and display badges in
user profiles: user profiles:
1. A "Badge Definition" event is defined as a parameterized replaceable event 1. A "Badge Definition" event is defined as a parameterized replaceable event with kind `30009` having a `d` tag with a value that uniquely identifies the badge (e.g. `bravery`) published by the badge issuer. Badge definitions can be updated.
with kind `30009` having a `d` tag with a value that uniquely identifies
the badge (e.g. `bravery`) published by the badge issuer. Badge definitions can
be updated.
2. A "Badge Award" event is a kind `8` event with a single `a` tag referencing 2. A "Badge Award" event is a kind `8` event with a single `a` tag referencing a "Define Badge" event and one or more `p` tags, one for each pubkey the badge issuer wishes to award. Awarded badges are immutable and non-transferrable.
a "Define Badge" event and one or more `p` tags, one for each pubkey the
badge issuer wishes to award. The value for the `a` tag MUST follow the format
defined in [NIP-33](33.md). Awarded badges are immutable and non-transferrable.
3. A "Profile Badges" event is defined as a parameterized replaceable event 3. A "Profile Badges" event is defined as a parameterized replaceable event
with kind `30008` with a `d` tag with the value `profile_badges`. with kind `30008` with a `d` tag with the value `profile_badges`.

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@ -4,63 +4,13 @@ NIP-65
Relay List Metadata Relay List Metadata
------------------- -------------------
`draft` `optional` `author:mikedilger` `draft` `optional` `author:mikedilger` `author:vitorpamplona`
A special replaceable event meaning "Relay List Metadata" is defined as an event with kind `10002` having a list of `r` tags, one for each relay the author uses to either read or write to. Defines a replaceable event using `kind:10002` to advertise preferred relays for discovering a user's content and receiving fresh content from others.
The primary purpose of this relay list is to advertise to others, not for configuring one's client. The event MUST include a list of `r` tags with relay URIs and a `read` or `write` marker. If the marker is omitted, the relay is used for both purposes.
The content is not used and SHOULD be an empty string. The `.content` is not used.
The `r` tags can have a second parameter as either `read` or `write`. If it is omitted, it means the author uses the relay for both purposes.
Clients SHOULD, as with all replaceable events, use only the most recent kind-10002 event they can find.
### The meaning of read and write
Write relays are for events that are intended for anybody (e.g. your followers). Read relays are for events that address a particular person.
Clients SHOULD write feed-related events created by their user to their user's write relays.
Clients SHOULD read feed-related events created by another from at least some of that other person's write relays. Explicitly, they SHOULD NOT expect them to be available at their user's read relays. It SHOULD NOT be presumed that the user's read relays coincide with the write relays of the people the user follows.
Clients SHOULD read events that tag their user from their user's read relays.
Clients SHOULD write events that tag a person to at least some of that person's read relays. Explicitly, they SHOULD NOT expect that person will pick them up from their user's write relays. It SHOULD NOT be presumed that the user's write relays coincide with the read relays of the person being tagged.
Clients SHOULD presume that if their user has a pubkey in their ContactList (kind 3) that it is because they wish to see that author's feed-related events. But clients MAY presume otherwise.
### Motivation
There is a common nostr use case where users wish to follow the content produced by other users. This is evidenced by the implicit meaning of the Contact List in [NIP-02](02.md)
Because users don't often share the same sets of relays, ad-hoc solutions have arisen to get that content, but these solutions negatively impact scalability and decentralization:
- Most people are sending their posts to the same most popular relays in order to be more widely seen
- Many people are pulling from a large number of relays (including many duplicate events) in order to get more data
- Events are being copied between relays, oftentimes to many different relays
### Purposes
The purpose of this NIP is to help clients find the events of the people they follow, to help tagged events get to the people tagged, and to help nostr scale better.
### Suggestions
It is suggested that people spread their kind `10002` events to many relays, but write their normal feed-related events to a much smaller number of relays (between 2 to 6 relays). It is suggested that clients offer a way for users to spread their kind `10002` events to many more relays than they normally post to.
Authors may post events outside of the feed that they wish their followers to follow by posting them to relays outside of those listed in their "Relay List Metadata". For example, an author may want to reply to someone without all of their followers watching.
It is suggested that relays allow any user to write their own kind `10002` event (optionally with AUTH to verify it is their own) even if they are not otherwise subscribed to the relay because
- finding where someone posts is rather important
- these events do not have content that needs management
- relays only need to store one replaceable event per pubkey to offer this service
### Why not in kind `0` Metadata
Even though this is user related metadata, it is a separate event from kind `0` in order to keep it small (as it should be widely spread) and to not have content that may require moderation by relay operators so that it is more acceptable to relays.
### Example
```json ```json
{ {
@ -74,3 +24,38 @@ Even though this is user related metadata, it is a separate event from kind `0`
"content": "", "content": "",
...other fields ...other fields
``` ```
This NIP doesn't fully replace relay lists that are designed to configure a client's usage of relays (such as `kind:3` style relay lists). Clients MAY use other relay lists in situations where a `kind:10002` relay list cannot be found.
## When to Use Read and Write
When seeking events **from** a user, Clients SHOULD use the WRITE relays of the user's `kind:10002`
When seeking events **about** a user, where the user was tagged, Clients SHOULD use the READ relays of the user's `kind:10002`
When broadcasting an event, Clients SHOULD:
- Broadcast the event to the WRITE relays of the author
- Broadcast the event all READ relays of each tagged user.
## Motivation
The old model of using a fixed relay list per user centralizes in large relay operators:
- Most users submit their posts to the same highly popular relays, aiming to achieve greater visibility among a broader audience.
- Many users are pulling events from a large number of relays in order to get more data at the expense of duplication
- Events are being copied between relays, oftentimes to many different relays
This NIP allows Clients to connect directly with the most up-to-date relay set from each individual user, eliminating the need of broadcasting events to popular relays.
## Final Considerations
1. Clients SHOULD guide users to keep `kind:10002` lists small (2-4 relays).
2. Clients SHOULD spread an author's `kind:10002` events to as many relays as viable.
3. `kind:10002` events should primarily be used to advertise the user's preferred relays to others. A user's own client may use other heuristics for selecting relays for fetching data.
4. DMs SHOULD only be broadcasted to the author's WRITE relays and to the receiver's READ relays to keep maximum privacy.
5. If a relay signals support for this NIP in their [NIP-11](11.md) document that means they're willing to accept kind 10002 events from a broad range of users, not only their paying customers or whitelisted group.

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@ -0,0 +1,101 @@
NIP-72
======
Moderated Communities (Reddit Style)
------------------------------------
`draft` `optional` `author:vitorpamplona` `author:arthurfranca`
The goal of this NIP is to create moderator-approved public communities around a topic. It defines the replaceable event `kind:34550` to define the community and the current list of moderators/administrators. Users that want to post into the community, simply tag any Nostr event with the community's `a` tag. Moderators issue an approval event `kind:4550` that links the community with the new post.
# Community Definition
`Kind:34550` SHOULD include any field that helps define the community and the set of moderators. `relay` tags MAY be used to describe the preferred relay to download requests and approvals.
```json
{
"id": "<32-bytes lowercase hex-encoded SHA-256 of the the serialized event data>",
"pubkey": "<32-bytes lowercase hex-encoded public key of the event creator>",
"created_at": <Unix timestamp in seconds>,
"kind": 34550,
"tags": [
["d", "<Community name>"],
["description", "<Community description>"],
["image", "<Community image url>", "<Width>x<Height>"],
//.. other tags relevant to defining the community
// moderators
["p", "<32-bytes hex of a pubkey1>", "<optional recommended relay URL>", "moderator"],
["p", "<32-bytes hex of a pubkey2>", "<optional recommended relay URL>", "moderator"],
["p", "<32-bytes hex of a pubkey3>", "<optional recommended relay URL>", "moderator"],
// relays used by the community (w/optional marker)
["relay", "<relay hosting author kind 0>", "author"],
["relay", "<relay where to send and receive requests>", "requests"],
["relay", "<relay where to send and receive approvals>", "approvals"],
["relay", "<relay where to post requests to and fetch approvals from>"]
]
}
```
# New Post Request
Any Nostr event can be a post request. Clients MUST add the community's `a` tag to the new post event in order to be presented for the moderator's approval.
```json
{
"id": "<32-bytes lowercase hex-encoded SHA-256 of the the serialized event data>",
"pubkey": "<32-bytes lowercase hex-encoded public key of the event creator>",
"created_at": <Unix timestamp in seconds>,
"kind": 1,
"tags": [
["a", "34550:<Community event author pubkey>:<d-identifier of the community>", "<Optional relay url>"],
],
"content": "<My content>"
}
```
Community management clients MAY filter all mentions to a given `kind:34550` event and request moderators to approve each submission. Moderators MAY delete his/her approval of a post at any time using event deletions (See [NIP-09](09.md)).
# Post Approval by moderators
The post-approval event MUST include `a` tags of the communities the moderator is posting into (one or more), the `e` tag of the post and `p` tag of the author of the post (for approval notifications). The event SHOULD also include the stringified `post request` event inside the `.content` ([NIP-18-style](18.md)) and a `k` tag with the original post's event kind to allow filtering of approved posts by kind.
```json
{
"id": "<32-bytes lowercase hex-encoded SHA-256 of the the serialized event data>",
"pubkey": "<32-bytes lowercase hex-encoded public key of the event creator>",
"created_at": <Unix timestamp in seconds>,
"kind": 4550,
"tags": [
["a", "34550:<Community event author pubkey>:<d-identifier of the community>", "<Optional relay url>"],
["e", "<Post Request ID>", "<Optional relay url>"],
["p", "<Post Request Author ID>", "<Optional relay url>"],
["k", "<New Post Request kind>"],
],
"content": "<New Post Request JSON>"
}
```
It's recommended that multiple moderators approve posts to avoid deleting them from the community when a moderator is removed from the owner's list. In case the full list of moderators must be rotated, the new moderator set must sign new approvals for posts in the past or the community will restart. The owner can also periodically copy and re-sign of each moderator's approval events to make sure posts don't disappear with moderators.
Post Approvals of replaceable events can be created in three ways: (i) by tagging the replaceable event as an `e` tag if moderators want to approve each individual change to the repleceable event; (ii) by tagging the replaceable event as an `a` tag if the moderator authorizes the replaceable event author to make changes without additional approvals and (iii) by tagging the replaceable event with both its `e` and `a` tag which empowers clients to display the original and updated versions of the event, with appropriate remarks in the UI. Since relays are instructed to delete old versions of a replaceable event, the `.content` of an `e`-approval MUST have the specific version of the event or Clients might not be able to find that version of the content anywhere.
Clients SHOULD evaluate any non-`34550:*` `a` tag as posts to be included in all `34550:*` `a` tags.
# Displaying
Community clients SHOULD display posts that have been approved by at least 1 moderator or by the community owner.
The following filter displays the approved posts.
```js
{
"authors": ["<Author pubkey>", "<Moderator1 pubkey>", "<Moderator2 pubkey>", "<Moderator3 pubkey>", ...],
"kinds": [4550],
"#a": ["34550:<Community event author pubkey>:<d-identifier of the community>"],
}
```
Clients MAY hide approvals by blocked moderators at the user's request.

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@ -8,7 +8,7 @@ Arbitrary custom app data
The goal of this NIP is to enable [remoteStorage](https://remotestorage.io/)-like capabilities for custom applications that do not care about interoperability. The goal of this NIP is to enable [remoteStorage](https://remotestorage.io/)-like capabilities for custom applications that do not care about interoperability.
Even though interoperability is great, some apps do not want or do not need interoperability, and it that wouldn't make sense for them. Yet Nostr can still serve as a generalized data storage for these apps in a "bring your own database" way, for example: a user would open an app and somehow input their preferred relay for storage, which would then enable these apps to store application-specific data there. Even though interoperability is great, some apps do not want or do not need interoperability, and it wouldn't make sense for them. Yet Nostr can still serve as a generalized data storage for these apps in a "bring your own database" way, for example: a user would open an app and somehow input their preferred relay for storage, which would then enable these apps to store application-specific data there.
## Nostr event ## Nostr event

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NIP-89
======
Recommended Application Handlers
--------------------------------
`draft` `optional` `author:pablof7z`
This NIP describes `kind:31989` and `kind:31990`: a way to discover applications that can handle unknown event-kinds.
## Rationale
Nostr's discoverability and transparent event interaction is one of its most interesting/novel mechanics.
This NIP provides a simple way for clients to discover applications that handle events of a specific kind to ensure smooth cross-client and cross-kind interactions.
### Parties involved
There are three actors to this workflow:
* application that handles a specific event kind (note that an application doesn't necessarily need to be a distinct entity and it could just be the same pubkey as user A)
* Publishes `kind:31990`, detailing how apps should redirect to it
* user A, who recommends an app that handles a specific event kind
* Publishes `kind:31989`
* user B, who seeks a recommendation for an app that handles a specific event kind
* Queries for `kind:31989` and, based on results, queries for `kind:31990`
# Events
## Recommendation event
```json
{
"kind": 31989,
"pubkey": <recommender-user-pubkey>,
"tags": [
[ "d", <supported-event-kind> ],
[ "a", "31990:app1-pubkey:<d-identifier>", "wss://relay1", "ios" ],
[ "a", "31990:app2-pubkey:<d-identifier>", "wss://relay2", "web" ]
]
}
```
The `d` tag in `kind:31989` is the supported event kind this event is recommending.
Multiple `a` tags can appear on the same `kind:31989`.
The second value of the tag SHOULD be a relay hint.
The third value of the tag SHOULD be the platform where this recommendation might apply.
## Handler information
```json
{
"kind": 31990,
"pubkey": <pubkey>,
"content": "<optional-kind:0-style-metadata>",
"tags": [
[ "d", <random-id> ],
[ "k", <supported-event-kind> ],
[ "web", "https://..../a/<bech32>", "nevent" ],
[ "web", "https://..../p/<bech32>", "nprofile" ],
[ "web", "https://..../e/<bech32>" ],
[ "ios", ".../<bech32>" ]
]
}
```
* `content` is an optional `set_metadata`-like stringified JSON object, as described in NIP-01. This content is useful when the pubkey creating the `kind:31990` is not an application. If `content` is empty, the `kind:0` of the pubkey should be used to display application information (e.g. name, picture, web, LUD16, etc.)
* `k` tags' value is the event kind that is supported by this `kind:31990`.
Using a `k` tag(s) (instead of having the kind onf the NIP-33 `d` tag) provides:
* Multiple `k` tags can exist in the same event if the application supports more than one event kind and their handler URLs are the same.
* The same pubkey can have multiple events with different apps that handle the same event kind.
* `bech32` in a URL MUST be replaced by clients with the NIP-19-encoded entity that should be loaded by the application.
Multiple tags might be registered by the app, following NIP-19 nomenclature as the second value of the array.
A tag without a second value in the array SHOULD be considered a generic handler for any NIP-19 entity that is not handled by a different tag.
# User flow
A user A who uses a non-`kind:1`-centric nostr app could choose to announce/recommend a certain kind-handler application.
When user B sees an unknown event kind, e.g. in a social-media centric nostr client, the client would allow user B to interact with the unknown-kind event (e.g. tapping on it).
The client MIGHT query for the user's and the user's follows handler.
# Example
## User A recommends a `kind:31337`-handler
User A might be a user of Zapstr, a `kind:31337`-centric client (tracks). Using Zapstr, user A publishes an event recommending Zapstr as a `kind:31337`-handler.
```json
{
"kind": 31989,
"tags": [
[ "d", "31337" ],
[ "a", "31990:1743058db7078661b94aaf4286429d97ee5257d14a86d6bfa54cb0482b876fb0:abcd", <relay-url>, "web" ]
]
}
```
## User B interacts with a `kind:31337`-handler
User B might see in their timeline an event referring to a `kind:31337` event
(e.g. a `kind:1` tagging a `kind:31337`).
User B's client, not knowing how to handle a `kind:31337` might display the event
using its `alt` tag (as described in NIP-31). When the user clicks on the event,
the application queries for a handler for this `kind`:
`["REQ", <id>, '[{ "kinds": [31989], "#d": ["31337"], 'authors': [<user>, <users-contact-list>] }]']`
User B, who follows User A, sees that `kind:31989` event and fetches the `a`-tagged event for the app and handler information.
User B's client sees the application's `kind:31990` which includes the information to redirect the user to the relevant URL with the desired entity replaced in the URL.
## Alternative query bypassing `kind:31989`
Alternatively, users might choose to query directly for `kind:31990` for an event kind. Clients SHOULD be careful doing this and use spam-prevention mechanisms to avoid directing users to malicious handlers.
`["REQ", <id>, '[{ "kinds": [31990], "#k": [<desired-event-kind>], 'authors': [...] }]']`

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NIP-94
======
File Metadata
-------------
`draft` `optional` `author:frbitten` `author:kieran` `author:lovvtide` `author:fiatjaf` `author:staab`
The purpose of this NIP is to allow an organization and classification of shared files. So that relays can filter and organize in any way that is of interest. With that, multiple types of filesharing clients can be created. NIP-94 support is not expected to be implemented by "social" clients that deal with kind:1 notes or by longform clients that deal with kind:30023 articles.
## Event format
This NIP specifies the use of the `1063` event type, having in `content` a description of the file content, and a list of tags described below:
* `url` the url to download the file
* `m` a string indicating the data type of the file. The MIME types format must be used (https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/MIME_types/Common_types)
* `"aes-256-gcm"` (optional) key and nonce for AES-GCM encryption with tagSize always 128bits
* `x` containing the SHA-256 hexencoded string of the file.
* `size` (optional) size of file in bytes
* `dim` (optional) size of file in pixels in the form `<width>x<height>`
* `magnet` (optional) URI to magnet file
* `i` (optional) torrent infohash
* `blurhash`(optional) the [blurhash](https://github.com/woltapp/blurhash) to show while the file is being loaded by the client
```json
{
"id": <32-bytes lowercase hex-encoded sha256 of the the serialized event data>,
"pubkey": <32-bytes lowercase hex-encoded public key of the event creator>,
"created_at": <unix timestamp in seconds>,
"kind": 1063,
"tags": [
["url",<string with URI of file>],
["aes-256-gcm",<key>, <iv>],
["m", <MIME type>],
["x",<Hash SHA-256>],
["size", <size of file in bytes>],
["dim", <size of file in pixels>],
["magnet",<magnet URI> ],
["i",<torrent infohash>],
["blurhash", <value>]
],
"content": <description>,
"sig": <64-bytes hex of the signature of the sha256 hash of the serialized event data, which is the same as the "id" field>
}
```
## Suggested use cases
* A relay for indexing shared files. For example, to promote torrents.
* A pinterest-like client where people can share their portfolio and inspire others.
* A simple way to distribute configurations and software updates.

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NIP-98
======
HTTP Auth
-------------------------
`draft` `optional` `author:kieran` `author:melvincarvalho`
This NIP defines an ephemerial event used to authorize requests to HTTP servers using nostr events.
This is useful for HTTP services which are build for Nostr and deal with Nostr user accounts.
## Nostr event
A `kind 27235` (In reference to [RFC 7235](https://www.rfc-editor.org/rfc/rfc7235)) event is used.
The `content` SHOULD be empty.
The following tags are defined as REQUIRED.
* `u` - absolute URL
* `method` - HTTP Request Method
Example event:
```json
{
"id": "fe964e758903360f28d8424d092da8494ed207cba823110be3a57dfe4b578734",
"pubkey": "63fe6318dc58583cfe16810f86dd09e18bfd76aabc24a0081ce2856f330504ed",
"content": "",
"kind": 27235,
"created_at": 1682327852,
"tags": [
[
"u",
"https://api.snort.social/api/v1/n5sp/list"
],
[
"method",
"GET"
]
],
"sig": "5ed9d8ec958bc854f997bdc24ac337d005af372324747efe4a00e24f4c30437ff4dd8308684bed467d9d6be3e5a517bb43b1732cc7d33949a3aaf86705c22184"
}
```
Servers MUST perform the following checks in order to validate the event:
1. The `kind` MUST be `27235`.
2. The `created_at` MUST be within a reasonable time window (suggestion 60 seconds).
3. The `u` tag MUST be exactly the same as the absolute request URL (including query parameters).
4. The `method` tag MUST be the same HTTP method used for the requested resource.
When the request contains a body (as in POST/PUT/PATCH methods) clients SHOULD include a SHA256 hash of the request body in a `payload` tag as hex (`["payload", "<sha256-hex>"]`), servers MAY check this to validate that the requested payload is authorized.
If one of the checks was to fail the server SHOULD respond with a 401 Unauthorized response code.
All other checks which server MAY do are OPTIONAL, and implementation specific.
## Request Flow
Using the `Authorization` header, the `kind 27235` event MUST be `base64` encoded and use the Authorization scheme `Nostr`
Example HTTP Authorization header:
```
Authorization: Nostr eyJpZCI6ImZlOTY0ZTc1ODkwMzM2MGYyOGQ4NDI0ZDA5MmRhODQ5NGVkMjA3Y2JhODIzMTEwYmUzYTU3ZGZlNGI1Nzg3MzQiLCJwdWJrZXkiOiI2M2ZlNjMxOGRjNTg1ODNjZmUxNjgxMGY4NmRkMDllMThiZmQ3NmFhYmMyNGEwMDgxY2UyODU2ZjMzMDUwNGVkIiwiY29udGVudCI6IiIsImtpbmQiOjI3MjM1LCJjcmVhdGVkX2F0IjoxNjgyMzI3ODUyLCJ0YWdzIjpbWyJ1cmwiLCJodHRwczovL2FwaS5zbm9ydC5zb2NpYWwvYXBpL3YxL241c3AvbGlzdCJdLFsibWV0aG9kIiwiR0VUIl1dLCJzaWciOiI1ZWQ5ZDhlYzk1OGJjODU0Zjk5N2JkYzI0YWMzMzdkMDA1YWYzNzIzMjQ3NDdlZmU0YTAwZTI0ZjRjMzA0MzdmZjRkZDgzMDg2ODRiZWQ0NjdkOWQ2YmUzZTVhNTE3YmI0M2IxNzMyY2M3ZDMzOTQ5YTNhYWY4NjcwNWMyMjE4NCJ9
```
## Reference Implementations
- C# ASP.NET `AuthenticationHandler` [NostrAuth.cs](https://gist.github.com/v0l/74346ae530896115bfe2504c8cd018d3)

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# NIP-99
## Classified Listings
`draft` `optional` `author:erskingardner`
This NIP defines `kind:30402`: a parameterized replaceable event to describe classified listings that list any arbitrary product, service, or other thing for sale or offer and includes enough structured metadata to make them useful.
The category of classifieds includes a very broad range of physical goods, services, work opportunities, rentals, free giveaways, personals, etc. and is distinct from the more strictly structured marketplaces defined in [NIP-15](https://github.com/nostr-protocol/nips/blob/master/15.md) that often sell many units of specific products through very specific channels.
The structure of these events is very similar to [NIP-23](https://github.com/nostr-protocol/nips/blob/master/23.md) long-form content events.
### Draft / Inactive Listings
`kind:30403` has the same structure as `kind:30402` and is used to save draft or inactive classified listings.
### Content
The `.content` field should be a description of what is being offered and by whom. These events should be a string in Markdown syntax.
### Author
The `.pubkey` field of these events are treated as the party creating the listing.
### Metadata
- For "tags"/"hashtags" (i.e. categories or keywords of relevance for the listing) the `"t"` event tag should be used, as per [NIP-12](https://github.com/nostr-protocol/nips/blob/master/12.md).
- For images, whether included in the markdown content or not, clients SHOULD use `image` tags as described in [NIP-58](https://github.com/nostr-protocol/nips/blob/master/58.md). This allows clients to display images in carousel format more easily.
The following tags, used for structured metadata, are standardized and SHOULD be included. Other tags may be added as necessary.
- `"title"`, a title for the listing
- `"summary"`, for short tagline or summary for the listing
- `"published_at"`, for the timestamp (in unix seconds – converted to string) of the first time the listing was published.
- `"location"`, for the location.
- `"price"`, for the price of the thing being listed. This is an array in the format `[ "price", "<number>", "<currency>", "<frequency>" ]`.
- `"price"` is the name of the tag
- `"<number>"` is the amount in numeric format (but included in the tag as a string)
- `"<currency>"` is the currency unit in 3-character ISO 4217 format or ISO 4217-like currency code (e.g. `"btc"`, `"eth"`).
- `"<frequency>"` is optional and can be used to describe recurring payments. SHOULD be in noun format (hour, day, week, month, year, etc.)
#### `price` examples
- $50 one-time payment `["price", "50", "USD"]`
- €15 per month `["price", "15", "EUR", "month"]`
- £50,000 per year `["price", "50000", "GBP", "year"]`
Other standard tags that might be useful.
- `"g"`, a geohash for more precise location
## Example Event
```json
{
"kind": 30402,
"created_at": 1675642635,
// Markdown content
"content": "Lorem [ipsum][nostr:nevent1qqst8cujky046negxgwwm5ynqwn53t8aqjr6afd8g59nfqwxpdhylpcpzamhxue69uhhyetvv9ujuetcv9khqmr99e3k7mg8arnc9] dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.\n\nRead more at nostr:naddr1qqzkjurnw4ksz9thwden5te0wfjkccte9ehx7um5wghx7un8qgs2d90kkcq3nk2jry62dyf50k0h36rhpdtd594my40w9pkal876jxgrqsqqqa28pccpzu.",
"tags": [
["d", "lorem-ipsum"],
["title", "Lorem Ipsum"],
["published_at", "1296962229"],
["t", "electronics"],
["image", "https://url.to.img", "256x256"],
["summary", "More lorem ipsum that is a little more than the title"],
["location", "NYC"],
["price", "100", "USD"],
[
"e",
"b3e392b11f5d4f28321cedd09303a748acfd0487aea5a7450b3481c60b6e4f87",
"wss://relay.example.com"
],
[
"a",
"30023:a695f6b60119d9521934a691347d9f78e8770b56da16bb255ee286ddf9fda919:ipsum",
"wss://relay.nostr.org"
]
],
"pubkey": "...",
"id": "..."
}
```

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# NIPs # NIPs
NIPs stand for **Nostr Implementation Possibilities**. They exist to document what may be implemented by [Nostr](https://github.com/fiatjaf/nostr)-compatible _relay_ and _client_ software. NIPs stand for **Nostr Implementation Possibilities**.
They exist to document what may be implemented by [Nostr](https://github.com/nostr-protocol/nostr)-compatible _relay_ and _client_ software.
---
- [List](#list)
- [Event Kinds](#event-kinds)
- [Event Kind Ranges](#event-kind-ranges)
- [Message Types](#message-types)
- [Client to Relay](#client-to-relay)
- [Relay to Client](#relay-to-client)
- [Standardized Tags](#standardized-tags)
- [Criteria for acceptance of NIPs](#criteria-for-acceptance-of-nips)
- [License](#license)
---
## List
- [NIP-01: Basic protocol flow description](01.md) - [NIP-01: Basic protocol flow description](01.md)
- [NIP-02: Contact List and Petnames](02.md) - [NIP-02: Contact List and Petnames](02.md)
@ -9,110 +26,171 @@ NIPs stand for **Nostr Implementation Possibilities**. They exist to document wh
- [NIP-05: Mapping Nostr keys to DNS-based internet identifiers](05.md) - [NIP-05: Mapping Nostr keys to DNS-based internet identifiers](05.md)
- [NIP-06: Basic key derivation from mnemonic seed phrase](06.md) - [NIP-06: Basic key derivation from mnemonic seed phrase](06.md)
- [NIP-07: `window.nostr` capability for web browsers](07.md) - [NIP-07: `window.nostr` capability for web browsers](07.md)
- [NIP-08: Handling Mentions](08.md) - [NIP-08: Handling Mentions](08.md) --- **unrecommended**: deprecated in favor of [NIP-27](27.md)
- [NIP-09: Event Deletion](09.md) - [NIP-09: Event Deletion](09.md)
- [NIP-10: Conventions for clients' use of `e` and `p` tags in text events](10.md) - [NIP-10: Conventions for clients' use of `e` and `p` tags in text events](10.md)
- [NIP-11: Relay Information Document](11.md) - [NIP-11: Relay Information Document](11.md)
- [NIP-12: Generic Tag Queries](12.md)
- [NIP-13: Proof of Work](13.md) - [NIP-13: Proof of Work](13.md)
- [NIP-14: Subject tag in text events.](14.md) - [NIP-14: Subject tag in text events](14.md)
- [NIP-15: End of Stored Events Notice](15.md) - [NIP-15: Nostr Marketplace (for resilient marketplaces)](15.md)
- [NIP-16: Event Treatment](16.md) - [NIP-18: Reposts](18.md)
- [NIP-19: bech32-encoded entities](19.md) - [NIP-19: bech32-encoded entities](19.md)
- [NIP-20: Command Results](20.md) - [NIP-21: `nostr:` URI scheme](21.md)
- [NIP-21: `nostr:` URL scheme](21.md)
- [NIP-22: Event `created_at` Limits](22.md) - [NIP-22: Event `created_at` Limits](22.md)
- [NIP-23: Long-form Content](23.md) - [NIP-23: Long-form Content](23.md)
- [NIP-25: Reactions](25.md) - [NIP-25: Reactions](25.md)
- [NIP-26: Delegated Event Signing](26.md) - [NIP-26: Delegated Event Signing](26.md)
- [NIP-27: Text Note References](27.md)
- [NIP-28: Public Chat](28.md) - [NIP-28: Public Chat](28.md)
- [NIP-33: Parameterized Replaceable Events](33.md) - [NIP-30: Custom Emoji](30.md)
- [NIP-31: Dealing with Unknown Events](31.md)
- [NIP-32: Labeling](32.md)
- [NIP-36: Sensitive Content](36.md) - [NIP-36: Sensitive Content](36.md)
- [NIP-39: External Identities in Profiles](39.md) - [NIP-39: External Identities in Profiles](39.md)
- [NIP-40: Expiration Timestamp](40.md) - [NIP-40: Expiration Timestamp](40.md)
- [NIP-42: Authentication of clients to relays](42.md) - [NIP-42: Authentication of clients to relays](42.md)
- [NIP-45: Counting results](45.md)
- [NIP-46: Nostr Connect](46.md) - [NIP-46: Nostr Connect](46.md)
- [NIP-47: Wallet Connect](47.md)
- [NIP-48: Proxy Tags](48.md)
- [NIP-50: Keywords filter](50.md) - [NIP-50: Keywords filter](50.md)
- [NIP-51: Lists](51.md) - [NIP-51: Lists](51.md)
- [NIP-52: Calendar Events](52.md)
- [NIP-53: Live Activities](53.md)
- [NIP-56: Reporting](56.md) - [NIP-56: Reporting](56.md)
- [NIP-57: Lightning Zaps](57.md) - [NIP-57: Lightning Zaps](57.md)
- [NIP-58: Badges](58.md) - [NIP-58: Badges](58.md)
- [NIP-65: Relay List Metadata](65.md) - [NIP-65: Relay List Metadata](65.md)
- [NIP-72: Moderated Communities](72.md)
- [NIP-78: Application-specific data](78.md) - [NIP-78: Application-specific data](78.md)
- [NIP-89: Recommended Application Handlers](89.md)
- [NIP-94: File Metadata](94.md)
- [NIP-98: HTTP Auth](98.md)
- [NIP-99: Classified Listings](99.md)
## Event Kinds ## Event Kinds
| kind | description | NIP | | kind | description | NIP |
| ------------- | -------------------------------- | ----------- | | ------- | -------------------------- | ----------- |
| 0 | Metadata | [1](01.md) | | `0` | Metadata | [1](01.md) |
| 1 | Short Text Note | [1](01.md) | | `1` | Short Text Note | [1](01.md) |
| 2 | Recommend Relay | [1](01.md) | | `2` | Recommend Relay | |
| 3 | Contacts | [2](02.md) | | `3` | Contacts | [2](02.md) |
| 4 | Encrypted Direct Messages | [4](04.md) | | `4` | Encrypted Direct Messages | [4](04.md) |
| 5 | Event Deletion | [9](09.md) | | `5` | Event Deletion | [9](09.md) |
| 7 | Reaction | [25](25.md) | | `6` | Repost | [18](18.md) |
| 8 | Badge Award | [58](58.md) | | `7` | Reaction | [25](25.md) |
| 40 | Channel Creation | [28](28.md) | | `8` | Badge Award | [58](58.md) |
| 41 | Channel Metadata | [28](28.md) | | `16` | Generic Repost | [18](18.md) |
| 42 | Channel Message | [28](28.md) | | `40` | Channel Creation | [28](28.md) |
| 43 | Channel Hide Message | [28](28.md) | | `41` | Channel Metadata | [28](28.md) |
| 44 | Channel Mute User | [28](28.md) | | `42` | Channel Message | [28](28.md) |
| 1984 | Reporting | [56](56.md) | | `43` | Channel Hide Message | [28](28.md) |
| 9734 | Zap Request | [57](57.md) | | `44` | Channel Mute User | [28](28.md) |
| 9735 | Zap | [57](57.md) | | `1063` | File Metadata | [94](94.md) |
| 10000 | Mute List | [51](51.md) | | `1311` | Live Chat Message | [53](53.md) |
| 10001 | Pin List | [51](51.md) | | `1984` | Reporting | [56](56.md) |
| 10002 | Relay List Metadata | [65](65.md) | | `1985` | Label | [32](32.md) |
| 22242 | Client Authentication | [42](42.md) | | `4550` | Community Post Approval | [72](72.md) |
| 24133 | Nostr Connect | [46](46.md) | | `9734` | Zap Request | [57](57.md) |
| 30000 | Categorized People List | [51](51.md) | | `9735` | Zap | [57](57.md) |
| 30001 | Categorized Bookmark List | [51](51.md) | | `10000` | Mute List | [51](51.md) |
| 30008 | Profile Badges | [58](58.md) | | `10001` | Pin List | [51](51.md) |
| 30009 | Badge Definition | [58](58.md) | | `10002` | Relay List Metadata | [65](65.md) |
| 30023 | Long-form Content | [23](23.md) | | `13194` | Wallet Info | [47](47.md) |
| 30078 | Application-specific Data | [78](78.md) | | `22242` | Client Authentication | [42](42.md) |
| 1000-9999 | Regular Events | [16](16.md) | | `23194` | Wallet Request | [47](47.md) |
| 10000-19999 | Replaceable Events | [16](16.md) | | `23195` | Wallet Response | [47](47.md) |
| 20000-29999 | Ephemeral Events | [16](16.md) | | `24133` | Nostr Connect | [46](46.md) |
| 30000-39999 | Parameterized Replaceable Events | [33](33.md) | | `27235` | HTTP Auth | [98](98.md) |
| `30000` | Categorized People List | [51](51.md) |
| `30001` | Categorized Bookmark List | [51](51.md) |
| `30008` | Profile Badges | [58](58.md) |
| `30009` | Badge Definition | [58](58.md) |
| `30017` | Create or update a stall | [15](15.md) |
| `30018` | Create or update a product | [15](15.md) |
| `30023` | Long-form Content | [23](23.md) |
| `30024` | Draft Long-form Content | [23](23.md) |
| `30078` | Application-specific Data | [78](78.md) |
| `30311` | Live Event | [53](53.md) |
| `30402` | Classified Listing | [99](99.md) |
| `30403` | Draft Classified Listing | [99](99.md) |
| `31922` | Date-Based Calendar Event | [52](52.md) |
| `31923` | Time-Based Calendar Event | [52](52.md) |
| `31924` | Calendar | [52](52.md) |
| `31925` | Calendar Event RSVP | [52](52.md) |
| `31989` | Handler recommendation | [89](89.md) |
| `31990` | Handler information | [89](89.md) |
| `34550` | Community Definition | [72](72.md) |
## Message types ## Message types
### Client to Relay ### Client to Relay
| type | description | NIP | | type | description | NIP |
|-------|-----------------------------------------------------|-------------| | ------- | --------------------------------------------------- | ----------- |
| EVENT | used to publish events | [1](01.md) | | `EVENT` | used to publish events | [01](01.md) |
| REQ | used to request events and subscribe to new updates | [1](01.md) | | `REQ` | used to request events and subscribe to new updates | [01](01.md) |
| CLOSE | used to stop previous subscriptions | [1](01.md) | | `CLOSE` | used to stop previous subscriptions | [01](01.md) |
| AUTH | used to send authentication events | [42](42.md) | | `AUTH` | used to send authentication events | [42](42.md) |
| `COUNT` | used to request event counts | [45](45.md) |
### Relay to Client ### Relay to Client
| type | description | NIP | | type | description | NIP |
|--------|---------------------------------------------------------|-------------| | -------- | ------------------------------------------------------- | ----------- |
| EVENT | used to send events requested to clients | [1](01.md) | | `EOSE` | used to notify clients all stored events have been sent | [01](01.md) |
| NOTICE | used to send human-readable messages to clients | [1](01.md) | | `EVENT` | used to send events requested to clients | [01](01.md) |
| EOSE | used to notify clients all stored events have been sent | [15](15.md) | | `NOTICE` | used to send human-readable messages to clients | [01](01.md) |
| OK | used to notify clients if an EVENT was successful | [20](20.md) | | `OK` | used to notify clients if an EVENT was successful | [01](01.md) |
| AUTH | used to send authentication challenges | [42](42.md) | | `AUTH` | used to send authentication challenges | [42](42.md) |
| `COUNT` | used to send requested event counts to clients | [45](45.md) |
Please update these lists when proposing NIPs introducing new event kinds. Please update these lists when proposing NIPs introducing new event kinds.
When experimenting with kinds, keep in mind the classification introduced by [NIP-16](16.md).
## Standardized Tags ## Standardized Tags
| name | value | other parameters | NIP | | name | value | other parameters | NIP |
| ---------- | ----------------------- | ----------------- | ------------------------ | | ----------------- | ------------------------------------ | -------------------- | ------------------------ |
| e | event id (hex) | relay URL, marker | [1](01.md), [10](10.md) | | `e` | event id (hex) | relay URL, marker | [01](01.md), [10](10.md) |
| p | pubkey (hex) | relay URL | [1](01.md) | | `p` | pubkey (hex) | relay URL, petname | [01](01.md), [02](02.md) |
| a | coordinates to an event | relay URL | [33](33.md), [23](23.md) | | `a` | coordinates to an event | relay URL | [01](01.md) |
| r | a reference (URL, etc) | | [12](12.md) | | `d` | identifier | -- | [01](01.md) |
| t | hashtag | | [12](12.md) | | `alt` | Alt tag | -- | [31](31.md) |
| g | geohash | | [12](12.md) | | `g` | geohash | -- | [52](52.md) |
| nonce | random | | [13](13.md) | | `i` | identity | proof | [39](39.md) |
| subject | subject | | [14](14.md) | | `k` | kind number (string) | -- | [18](18.md), [72](72.md) |
| d | identifier | | [33](33.md) | | `l` | label, label namespace | annotations | [32](32.md) |
| expiration | unix timestamp (string) | | [40](40.md) | | `L` | label namespace | -- | [32](32.md) |
| `r` | a reference (URL, etc) | -- | |
| `r` | relay url | marker | [65](65.md) |
| `t` | hashtag | -- | |
| `amount` | millisatoshis, stringified | -- | [57](57.md) |
| `bolt11` | `bolt11` invoice | -- | [57](57.md) |
| `challenge` | challenge string | -- | [42](42.md) |
| `content-warning` | reason | -- | [36](36.md) |
| `delegation` | pubkey, conditions, delegation token | -- | [26](26.md) |
| `description` | badge description | -- | [58](58.md) |
| `description` | invoice description | -- | [57](57.md) |
| `emoji` | shortcode, image URL | -- | [30](30.md) |
| `expiration` | unix timestamp (string) | -- | [40](40.md) |
| `image` | image URL | dimensions in pixels | [23](23.md), [58](58.md) |
| `lnurl` | `bech32` encoded `lnurl` | -- | [57](57.md) |
| `location` | location string | -- | [52](52.md), [99](99.md) |
| `name` | badge name | -- | [58](58.md) |
| `nonce` | random | -- | [13](13.md) |
| `preimage` | hash of `bolt11` invoice | -- | [57](57.md) |
| `price` | price | currency, frequency | [99](99.md) |
| `proxy` | external ID | protocol | [48](48.md) |
| `published_at` | unix timestamp (string) | -- | [23](23.md) |
| `relay` | relay url | -- | [42](42.md) |
| `relays` | relay list | -- | [57](57.md) |
| `subject` | subject | -- | [14](14.md) |
| `summary` | article summary | -- | [23](23.md) |
| `thumb` | badge thumbnail | dimensions in pixels | [58](58.md) |
| `title` | article title | -- | [23](23.md) |
| `zap` | pubkey (hex), relay URL | weight | [57](57.md) |
## Criteria for acceptance of NIPs ## Criteria for acceptance of NIPs
@ -122,6 +200,21 @@ When experimenting with kinds, keep in mind the classification introduced by [NI
4. There should be no more than one way of doing the same thing. 4. There should be no more than one way of doing the same thing.
5. Other rules will be made up when necessary. 5. Other rules will be made up when necessary.
## Mailing Lists
The nostr ecosystem is getting large with many different organizations, relays
and clients. Following the nips repo on github is becoming more difficult and
noisy. To coordinate on protocol development outside of github, there are
mailing lists where you can work on NIPs before submitting them here:
* [w3c nostr community group][w3-nostr] - [public-nostr@w3.org][mailto-w3] - requires signup
* [nostr-protocol google group][nostr-google-group] - [nostr-protocol@googlegroups.com][mailto-google] - no signup required
[w3-nostr]: https://www.w3.org/community/nostr/
[mailto-w3]: mailto:public-nostr@w3.org
[nostr-google-group]: https://groups.google.com/g/nostr-protocol
[mailto-google]: mailto:nostr-protocol@googlegroups.com
## License ## License
All NIPs are public domain. All NIPs are public domain.