Explainer: What’s Agglayer v0.3? Primarily, it’s an upgrade to the zk powered pessimistic proof, which is how Agglayer guarantees that no chain can extract more than it has deposited into the unified bridge. v0.3 includes another guardrail that provides trust that a chain has settled properly, according to its block-building method. Think of this like 2FA, where chains attach a proof alongside the inputs required to build the pessimistic proof.