Just out of curiosity, I think it would be interesting to build a transaction bridge between Lightning and Monero.

Maybe something like: you enter the Monero address you want to pay with your Lightning wallet, it generates a Lightning invoice, and once settled, seamlessly converts those sats to Monero and sends them to the recipient's wallet, vice-versa

Not sure if there’s a real-world use case for it, but it could be an interesting experiment. 

 lightning can be extended to all other assets, including lines of credit between parties that trust each other so there is nothing stopping devs from building a monero wallet that can receive from bitcoin lighting wallets via some exchange nodes. Mixing on-chain with lightning is the problem here, as on-chain payments are not final, so the one exchanging lightning payments for monero pay-outs needs to be trusted. 

 Putting together a basic prototype, and while it's very sketchy but, it's functional. There's definitely room for improvement, and I still need to explore other approaches. 

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