oh man - ok i think i got VOPRFs.
https://github.com/cloudflare/voprf-ts?utm_source=chatgpt.com
thus is actually awesome. you make the client keep a copy of all their friends email addresses - and then every time you connect (load takiwa in the browser or whateva) you generate a VORPF got all the emails yo wanna be friends with and query the server 'yo these homies online now my bro?'.
and the server like yeee naaaa my gee, but maybe homie xyz is yeah cuz
so its like facebook with friend discovery but you dont gotta let the server know shit. i kinda like that. bootstrap off email without leaking all yo friends email addresses.
ok lemme check real quick i can extract all y'all email addresses outta gmail with some kinda bookmarklet shit