I recommend against using Lightning. I have a Monero dev bounty going to expand nostr tipping with wallet bots for other cryptocurrencies - https://bounties.monero.social/posts/163/documentation-or-tooling-for-nostr-wallet-bot-setup

A couple of devs, nostr:npub133hgu8tluw24spyzey36tydy06ux0pw4tw0jttr0aeu8wq9vf4hsq9q6gk and nostr:npub12xyl6w6aacmqa3gmmzwrr9m3u0ldx3dwqhczuascswvew9am9q4sfg99cx have taken interest in the bounty