you mean to which pubkey senders should nutzap p2pk-lock? they should look at the 10019 kind's p2pk; senders shouldn't even try to look at the 37375 events.

There can only be one 10019 (since 10k <= x < 20k kinds are not param-replaceable) 

 Sorry, I said nut zap but I meant nip-60.

So basically when my app wants to use a logged in users Cashu wallet, but it discovers multiple kind 37375 wallets 

 ah, in that case I just let them choose

https://cdn.satellite.earth/1e04ff005b0d0f51c5de3c50ad4998648bcf93b80fc5c48e6dc036fd57b85ebd.png