How far away are we from a simple ZK passport implementation?

Would let Farcaster users verify an email or passport without disclosing sensitive information. 

Key word is simple (i.e, can build a working FC prototype in a day).

Really cool that self.xyz leverages zk proofs to allow people to verify their passport and only selectively share data points about it for verification e.g. age over 18, not on OFAC list, etc. Have wanted to see this practical use of zk for so long!

https://farcaster.xyz/linda/0xdba794b7

https://farcaster.xyz/mareko/0x5aab8008 cc @mareko

Working on Celo. CTO at cLabs and President at 
Valora. Previously Locu (founder), MIT (PhD alumni), Microsoft and Google.

Technowatermelon. Elder Millenial. Building Farcaster. 

nf.td/varun

Developer ecosystem @farcaster, co-founder @bountycaster. Previously: co-founder of Scalar Capital, product at Coinbase, co-producer @ethereumfilm