whir-svo#204
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Co-authored-by: Copilot <copilot@github.com>
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…_batched` Co-authored-by: Copilot <copilot@github.com>
# Conflicts: # crates/whir/src/open.rs
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Co-Authored-By: carlo <carlo.modica@protonmail.com>
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# Conflicts: # crates/whir/src/open.rs
Adopt main's always-IV slice hashing (length absorbed into the IV for domain separation) while keeping whir-split-eq's existing zero-skip optimization at the DFT layer (commit_with_prefix_len / reorder_and_dft_with_prefix_len). The Merkle layer keeps the simpler merkle_commit(matrix, n_cols) API and hashes the full DFT matrix, since the DFT already cut trailing zeros. Concretely: - precompute_zero_suffix_state + hash_rtl_iter_with_initial_state added to the sponge module (alongside the existing hash_iter). - whir/src/merkle.rs first_digest_layer switched to RTL absorption seeded with [base_width, 0, ..., 0], via the new vertically_packed_row_rtl matrix helper (n_zero_chunks = 0). - backend merkle_verify and fiat-shamir verifier swap hash_iter for hash_slice so the verifier reproduces the prover's IV-based digest. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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