Nice … been a minute since I checked.
It's already implemented (fiatjaf is fast:)). https://github.com/fiatjaf/khatru/blob/master/blossom/handlers.go#L396
Discussion
With fiatjaf and utxo, blink for a second and they’ve already implemented everything. Honestly, folks started bothering fiatjaf about mirroring because of Primal, and 24 hours later it was already on Khatru. Meanwhile, I’m still trying to get GitHub Actions to build some binaries after a couple of months messing with it, lol. If I weren’t older than both of them, I’d say that when I grow up, I want to be like them :)
Haven still has a compatibility issue with mirroring on Primal mobile (gracefully fixed by nostr:nprofile1qqsqxcftp6awpmydxqp3c3qt5zrllx73v2tzmla6fdhqy8ky4lt3y9spzemhxue69uhhyetvv9ujumn0wd68ytnzv9hxgqgswaehxw309ahx7um5wghxcctwvsq3qamnwvaz7tmwdaehgu3wwa5kuegrd0eh4 on Khatru). Otherwise, it’s working well (tested with Nak and Primal Web). When fiatjaf cuts the next version (hopefully with the changes I mentioned above) ’ll do some more testing on the mirror endpoint and update Haven. But if you’re using the latest master of Khatru, everything should already be working.