3sf-mini: a basic implementation and simulation of 3-slot finality

(many details of 3sf are of course still in flux; the goal is to create a minimal software package that makes it easy to understand 3sf and play around with options)

https://github.com/ethereum/research/tree/master/3sf-mini

Warning: This actually makes 𝗦𝗲𝗻𝘀𝗲

by @degenfans

Full-time dev, part-time debugger of my own bad decisions. Still lovely, allegedly!

Be careful with sensitive content, it can have unexpected consequences.