How to structure the URL when there is only a lightning invoice available

[rolznz]

Should BIP21 be used in this case? we see some benefits since the bitcoin scheme is recognized, where lightning: is not.

Should it be:

bitcoin:?lightning=${invoice} // or can we put `null` as the bitcoin address?

or

bitcoin://?lightning=${invoice}

Unforunately the support right now seems less than the number of wallets that support lightning:lnbc... links

[sbddesign]

@rolznz good question. Funny, because this came up in discussion on the BIP for human readable payment instructions over DNS. See Matt's comment.

There is now a PR to BIP21 discussing this here.

We should let discussion play out in that BIP, then update this site accordingly.