Introducing BSC State Expiry Column

[0xbundler]

Here is the discussion about state expiry design, welcome to review & comment on it.

BEP(Idea): State Expiry On BNB Chain

BEP(Idea v0.1): State Expiry On BNB Chain 1.Motivation Storage has always been a big challenge for blockchain, since the data may not be deleted and it keeps growing. Ethereum proposed EIP-4444, trying to prune history block, header, receipt to make the node lighter. But it didn’t touch the storage, which could be even larger than blocks. Before addressing the storage challenge, there are some universal rules that we think are reasonable: Very old data is most likely seldomly used. The on-…