EddieOz on Nostr: Martti Malmi last year I wrote this, but didn't have time to implement on a proper ...

Martti Malmi (nprofile…suzd) last year I wrote this, but didn't have time to implement on a proper client: https://github.com/eddieoz/nostr-stealth

Maybe it can be useful on building a totally private communication.
It encrypts all the metadata, uses ephemeral key (like you recently implemented on Iris, and a kind of channel mixer.

It has some interesting ideas that can be used.