Consider uncle blocks when processing chain txs/events

[bitwiseguy]

https://github.com/statechannels/go-nitro/pull/1517#discussion_r1293608897

[lalexgap]

I think with proof of stake uncle blocks aren't a thing. Since validators get pre-selected to propose blocks you don't have the case of multiple valid blocks being proposed at the same time.

That said, I think chain re-orgs can still happen with PoS, which is kind of the same underlying problem as uncle blocks.

[kerzhner]

Excellent point @lalexgap! Seems like this is a low priority issue for now.

[NiloCK]

Is filecoin in the same state?

[lalexgap]

Is filecoin in the same state?

Filecoin using something called proof of spacetime, which I'm not super familiar with. Based on this documentation it looks like it functions similar to proof of stake where validators are elected ahead of time. So I would expect filecoin not to have uncle blocks, similar to ethereuem's proof of stake system.