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Switch SSZ hashing to Poseidon2 via hash‑zig (BREAKING) #473

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chetanyb wants to merge 4 commits into from
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Switch SSZ hashing to Poseidon2 via hash‑zig (BREAKING) #473

chetanyb wants to merge 4 commits into from

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@chetanyb chetanyb commented Jan 9, 2026 •
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Description:

  • Breaking: SSZ roots change because hashing switches from SHA256 to Poseidon2‑24.
  • Adds hash-zig dependency and wires it into build targets (including zkvm).
  • Replaces SHA256 with hash_zig.ssz.SszHasher across SSZ hashing calls.
  • Updates expected SSZ hash vectors and genesis root tests to Poseidon outputs.

@chetanyb chetanyb changed the title Update SSZ hashTreeRoot calls for new API Switch SSZ hashing to Poseidon2 via hash‑zig (BREAKING) Jan 9, 2026
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chetanyb commented Jan 25, 2026

closed in favour of #522

@chetanyb chetanyb closed this Jan 25, 2026
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