MMR tag: add merkle mountain range tag

[nostronaut]

Description

Add merkle mountain range as an append only vector commitment to nostr events' metadata. This produces an authenticated event log.

The NIP was briefly sketched here

The current PR fork is used here

[nostronaut]

@yukibtc

we further worked out the code to integrate MMR into nostr

we isolated the library side in this file https://github.com/nostronaut/mmr-nostr/blob/master/src/lib.rs

that could belong to a feature in this crate if there's interest, not important though. for example, we have to recreate EventId, in order to not impl Foreign trait for foreign type, et cetera

we plan to write the nip after implementation is decent

[yukibtc]

@yukibtc

we further worked out the code to integrate MMR into nostr

we isolated the library side in this file https://github.com/nostronaut/mmr-nostr/blob/master/src/lib.rs

that could belong to a feature in this crate if there's interest, not important though. for example, we have to recreate EventId, in order to not impl Foreign trait for foreign type, et cetera

we plan to write the nip after implementation is decent

Thanks, I will check your repo.

If it's needed to recreate EventId and other struct, I think it's better to integrate the code in the nostr crate, as you said.