btcpayserver: LNURL does not work with c-lightning v0.11.0

When attempting to pay a LNURL invoice using Phoenix, BTCPay displays a QR code, Phoenix will scan it and show the amount, but attempting pay fails.

In the server log I see the following 400 error:

BTC/lnurl/pay/i/Jk5Sfw1M...?amount=29000

When I check the URL in a browser:

{"status":"ERROR","reason":"Lightning node could not generate invoice with description hash"}

I don’t (fully) understand how LNURL works, but I suspect that you need to use the new deschashonly option for c-lighting (added in https://github.com/btcpayserver/btcpayserver/pull/3559).

About this issue

Original URL
State: closed
Created 2 years ago
Comments: 25 (9 by maintainers)

Most upvoted comments

@pavlenex glad you were able to reproduce! Yes, I did have that 3rd option selected. I initially found out while trying a lightning address, but it also happens when I manually create a LNURL invoice.

I did not dare to downgrade my production c-lightning node. I’m reckless, but there’s limits 😃

Sjors on May 5, 2022

The problem was that my manual code for detecting the chain for each invoice was missing signet and was treating it as mainnet (default case).

Solved by skipping the LND *chaincfg.Params premade stuff and just passing the code manually.

fiatjaf on May 10, 2022

Managed to replicate after an update. This is def a bug it seems cc @Kukks

pavlenex on May 5, 2022