LNURLpay over Tor

btcpay-on-raspiblitz.md

LNURLpay over Tor

Setup used

• Raspiblitz on the dev branch (~v1.9.0rc3 - earlier versions should work)
• CLN / LND with incoming capacity on public channel(s)
• BTCPayServer v1.8.2 (an earlier version with LNaddress support should work)

Steps to create the service

• Create user and log in
• Create Store
• Set up a Lightning Node
• Paste the string from the Raspiblitz terminal menu CONNECT -> BTCPAY-CLN / BTCPAY-LND
• Save and close
• Click the Lightning Address under PLUGINS
• Add Address (the part after the @ does not matter) eg:

  oniontip@192.168.3.175:23001
  

• Create a Tor Hidden Service for the BTCPay HTTP port in the Raspiblitz terminal with this command:

  config.scripts/tor.onion-service.sh btcpayhttp 80 23000
  

  Example output:

  # Hidden Service for btcpayhttp
  HiddenServiceDir /mnt/hdd/tor/btcpayhttp
  HiddenServiceVersion 3
  HiddenServicePort 80 127.0.0.1:23000
  
  Reloading Tor to activate the Hidden Service...
  
  The Tor Hidden Service address for btcpayhttp is:
  foj373kji26vs4ntlltxlizrqfzkd5kqc45jst5hc6ntwcrma5a5xxqd.onion
  use with the port: 80
  

LN address over Tor

• With the username and onion address put together the Lightning Address is ready:

  oniontip@foj373kji26vs4ntlltxlizrqfzkd5kqc45jst5hc6ntwcrma5a5xxqd.onion
  

LNURLpay code

• The URL to encode (as explained in https://github.com/andrerfneves/lightning-address/blob/master/README.md#tldr):

  http://hidden-service.onion/.well-known/lnurlp/username
  

  For this example:

  http://foj373kji26vs4ntlltxlizrqfzkd5kqc45jst5hc6ntwcrma5a5xxqd.onion/.well-known/lnurlp/oniontip
  

• Encode to base64 according to https://github.com/lnurl/luds/blob/luds/01.md. Can use https://lnurl.fiatjaf.com/codec/

• Example result:

  lnurl1dp68gup69uhkvmm2xvmnx6m2dyervannx3h8gmrvw3uxc6t6wfckv7ntvs6kkutrxs6k5um5x45xxdnww3mkxundvy6kzdtc0pckgtn0de5k7m309emk2mrv944kummhdchkcmn4wfk8qtm0de5k7mn5d9cqd8tcnf
  

• To create a QR code in the Raspiblitz terminal use the command:

  qr lnurl1dp68gup69uhkvmm2xvmnx6m2dyervannx3h8gmrvw3uxc6t6wfckv7ntvs6kkutrxs6k5um5x45xxdnww3mkxundvy6kzdtc0pckgtn0de5k7m309emk2mrv944kummhdchkcmn4wfk8qtm0de5k7mn5d9cqd8tcnf
  

Pay to the static LNURLpay code over onion

• https://t.me/lightningtipbot now
• Breez - in next release https://twitter.com/ubbabeck/status/1634580039286104064
• Zeus - WIP draft: https://github.com/ZeusLN/zeus/pull/1349/files
• Bitcoin Beach Wallet - feature request: https://github.com/GaloyMoney/galoy-mobile/issues/1441
• More to come

Discussion on nostr: note1sxerxt4fcg3p2tsf3kpv7ljza5t2rpulkg48s7rny9dha8f4j4uq6hu55x

Twitter: https://twitter.com/openoms/status/1634661087739097096