NFC features for LNURL-w

[benjamin-wilson]

Describe the feature

The goal of this feature is to emulate being your own credit card provider. Here is one way you could implement it:

On the main page of zeus, under the Lightning & On-chain sections there could be a similarly styled button called 'NFC', 'Cards', 'NFC-Cards', 'LNURL Withdraw', 'NFC LNURL-w' or something similar.

Clicking this button would have 'send' and 'mange' settings.

Clicking 'send' would open a dialog where you could enter the max amount for the LNURL-w and then another button to use host-based card emulation to send the LNURL-w over NFC (disposable).
https://developer.android.com/guide/topics/connectivity/nfc/hce

Clicking 'mange' would allow you to create LNURL-w's and write them to a NFC card. This section would also allow you to read existing NFC cards. You could also keep track of all the cards and their balances. (permanent)
https://docs.lnpay.co/api/lnurl-withdraw/how-does-lnurl-withdraw-work
https://twitter.com/BitcoinQ_A/status/1527286484385992707

[Bosch-0]

Could also achieve a lot of this more eloquently and natively using Offers. Great suggestion though will put it on our backlog to look into. Doing stuff with NFC cards is something we've discussed doing for awhile

[benjamin-wilson]

I agree unfortunately LND doesn't support BOLT 12 yet and doesn't look like it'll be implemented soon.
lightningnetwork/lnd#5594 (comment)