A place for talking about the Ethereum Virtual Machine on Farcaster.

Simple question about ZK rollups - when one is put on the main chain, who is the adversary and what action does the rollup defend against?

Tradfi coder by day, hacker by night. Doesn’t know night from day. Freelance scribe. Dad cook. Dog butler.  Happy Grandpa. Draws badly.

What do you mean? Are you asking about how the zk-rollup data gets posted on L1?

tricks with polynomials. Computational monadologist. Prev: ML HealthCareInc 🦄 | R&D PeopleFund | AI & Stats lecturer

I understand how, I’m trying to work out why?

Building pods.media to help you collect conversations.

This I believe I understand (but find myself wrong often). But my question is really what is the threat model - if the l2 is its own blockchain and state authority, then what protection do I get against what attack threat by having a rollup on mainnet?

Validity proofs prove valid execution of state transitions. Rollups make the state transitions of a chain canonically ordered via the ordering of the layer the transitions are rolled up to.