Hi @jimmysong, mind covering Penlock again? I read your letter so I remember you checked it out last time, it was pretty cool to see. We finally completed the public release, could use the push! Also, I'd be glad to answer any question for you! (bitcoindev link: https://groups.google.com/g/bitcoindev/c/8LkdxVc_nI0/m/ggNzdX1NAwAJ)