Ethereum

ok i'll bite - what is a based rollup?

https://x.com/drakefjustin/status/1798734295332274408

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Simplified version: Instead of being run by the L2 organization, the sequencer (which orders L2 transactions, creates L2 blocks, and posts them to L1) is actually operated by Ethereum L1 block builders

@justindrake argues this is the most credibly neutral way to sequence L2 blocks

/ethereum foundation | control the memes control the minds paragraph.xyz/@chaskin

That's exactly right :) Based sequencing is when the base layer (i.e. L1 proposers) sequence L2 blocks.

Based sequencing is the most credibly neutral (shared) sequencer and allows for synchronous composability between the L1 and L2s.

does the synchronous composability stem from some kind of guarantee that a state change can happen on L1 and L2 in the same block? do you have any recommended reading on this topic?