16.1 From Linux Kernel, to Bitcoin Sidechains and Lightning Network || Rusty Russell

Rusty’s Wife encouraged him to take a sabbatical from Linux Kernel work, so he developed Petty Cash, what is now known as one of the first Bitcoin sidechains. Later Blockstream published their Sidechain paper, introducing a federated two way peg, so Rusty joined their team. But with the publication of the Lightning Network paper, he shifted his focus to specifying the Lightning spec and developing c-lightning, the very first Lightning implementation.