bitcoin

Help me understand LNURL and lightning address

soft

It is possible the wallet you are using does not support LNURL Auth.

A list of wallets that do:
    Alby
    Balance of Satoshis
    Blixt
    Breez
    Blue Wallet
    Coinos
    LNBits
    LNtxtbot
    Phoenix
    Simple Bitcoin Wallet
    Sparrow Wallet
    ThunderHub
    Zap Desktop
    Zeus

The generated URL contains nothing private. It is basically just the domain of the service, for example stackernews with a few url parameters that define if its for logging in or signing up and then a random 32 byte string. The QR code just makes it easy to transmit between devices but services will also provide an encoded LNURL string.

The wallet will sign that random string and submit it back to the service to authenticate.

So for a wallet to support LNURL it must
 - decode LNURL strings
 - sign the random 32 bytes of data
 - submit to the service to authenticate with that signature.
