"When zaps are enabled (proxy = true) this service uses the configured CLN rpc to create an invoice, that is returned to the when a request is made to the lighting address."

"Once this invoice is paid this service then requests a mint, mints a cashu token and sends a nostr direct message to the preconfigured pubkey."

"To enable zap notes to be published some extra configuration is needed as well as a CLN node. This is because a valid zap request requires the invoice description to be a zap_request. In order to provide best privacy mints to no allow descriptions to be set."

https://github.com/thesimplekid/cashu-lnurl?ref=nobsbitcoin.com

https://www.nobsbitcoin.com/cashu-lnurl/#:~:text=%22When%20zaps%20are,to%20be%20set.%22