Coming soon, hopefully. It's based on an observation about phoenix: their version of splice-in transactions atomically swap an inbound lightning payment for a fresh deposit of bitcoin into your channel. This form of atomic swap is better than a submarine swap in this respect: it uses only one single bitcoin transaction instead of two. So I came up with a generalized version that can be used outside of lightning wallets and I called it papa swap. I was about to implement it too (hence the repo) but I got delayed by the need to prepare workshops for upcoming conferences. When things settle down I hope to implement it. 

 🫡 looking forward to this