sandwich on Nostr: Updated answer: NIP-22 via NIP-66 See `k` tag in `30166` event.Updated answer: NIP-22 via NIP-66https://github.com/nostr-protocol/nips/blob/42c510183434809b729557d25c403cfe2ca1e7fa/66.md#single-letter-tags-indexedSee `k` tag in `30166` event.