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Morning Edition · Monday, September 14, 2026Published at 1:49 AM EDT · New York
Ethereum Researchers Publish a Machine-Checked Implementation of the Consensus Layer's Data Format
SizzLean proves roundtrip, non-malleability and size-bound properties for the serialization format across every type the consensus protocol uses, and passes the upstream conformance tests.
A team working in the Lean 4 proof assistant has published SizzLean, a formally verified implementation of the full SSZ stack. SSZ, short for Simple Serialize, is the format the Ethereum consensus layer uses to encode data and to compute th…
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Part of a tracked trend
Formal Verification Moves Into Consensus Plumbing
Machine-checked proofs keep replacing convention and client diversity as the guarantee under core blockchain infrastructure, starting at encoding and state layers, because proof-assistant tooling has become cheap enough for protocol teams to ship verified components as ordinary libraries.
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