Discuss: Add arbitrary key value storage to actors

A fairly low cost and complexity thing we could add to filecoin would be a simple key value store on each actor (or maybe just account actors). This would allow users to store small bits of data on chain, easily (obviously paying for it). This can be an incredibly useful feature for many reasons, but the primary one i’m thinking through is allowing users to signal things to the network like version, to make it easier to reason about and observe forks. This information would be unverifiable, but serves as a good signal.

I’m always a big proponent of leaving protocols open for extensibility, and I feel that this gives us a lot of it