NIP-60 cashu wallets

[ekzyis]

Is your feature request related to a problem? Please describe.

NIP-60 specifies a cashu wallet that stores its unspent proofs on nostr relays.

It's another wallet one could attach since it can pay any bolt11. It's also meant to make receiving immediately available:

The purpose of this NIP is:

• ease-of-use: new users immediately are able to receive funds without creating accounts with other services.
• interoperability: users' wallets follows them across applications.

Apparently, all you need is your nostr identity and then you can immediately spend your cashu in any application. So if stackers are already using nostr and don't mind custody, this might become a popular option as a "starter wallet" since it requires little to no configuration.

Describe the solution you'd like

Add NIP-60 as a wallet

Describe alternatives you've considered

n/a

Additional context

n/a