README: list the supported NIPs

README.md

@@ -4,3 +4,31 @@ There is an example/reference implementation at [basic](/examples/basic/). Binar
 https://github.com/fiatjaf/relayer/releases).
 
 <a href="https://godoc.org/github.com/fiatjaf/relayer"><img src="https://img.shields.io/badge/api-reference-blue.svg?style=flat-square" alt="GoDoc"></a>
+
+## Supported NIPs
+
+These are handled by the framework itself, so every relay built on it gets them:
+
+| NIP | |
+| --- | --- |
+| [01](https://github.com/nostr-protocol/nips/blob/master/01.md) | Basic protocol flow (`EVENT`, `REQ`, `CLOSE`, `EOSE`, `OK`, `CLOSED`, `NOTICE`), including what used to be NIPs 12, 15, 16, 20 and 33 |
+| [09](https://github.com/nostr-protocol/nips/blob/master/09.md) | Event deletion request |
+| [11](https://github.com/nostr-protocol/nips/blob/master/11.md) | Relay information document |
+| [67](https://github.com/nostr-protocol/nips/blob/master/67.md) | EOSE completeness hint |
+| [77](https://github.com/nostr-protocol/nips/blob/master/77.md) | Negentropy syncing (`NEG-OPEN`, `NEG-MSG`, `NEG-CLOSE`) |
+
+These depend on what your relay implements:
+
+| NIP | requires |
+| --- | --- |
+| [42](https://github.com/nostr-protocol/nips/blob/master/42.md) | `Auther` — authentication of clients to relays |
+| [17](https://github.com/nostr-protocol/nips/blob/master/17.md), [59](https://github.com/nostr-protocol/nips/blob/master/59.md) | `Auther` — gift-wrapped events are only served to the pubkey they are addressed to |
+| [45](https://github.com/nostr-protocol/nips/blob/master/45.md) | a storage implementing `EventCounter` — `COUNT` |
+
+The default NIP-11 document reports exactly this set. A relay implementing
+`Informationer` replaces the document wholesale and is responsible for its own
+`supported_nips`.
+
+Note that the numbers 12, 15, 16, 20 and 33 still appear in that document for
+the benefit of older clients; those NIPs were merged into NIP-01 and no longer
+exist on their own.