Block-in-Blobs (BiB)

Status history

1. Draft29 Jan 2026

Abstract

zkEVMs allow validators to verify the correctness of an execution payload using a proof, without downloading or executing the payload itself. However, removing the requirement to download the execution payload, also removes the implicit data availability (DA) guarantee; a block producer can publish a valid proof and withhold the execution-payload data since attesters no longer need them for…