feat(wasm-utxo): add BLAKE2b-256 personalization helper#333
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Shared primitive for Zcash ZIP-243/ZIP-244/ZIP-316 hashing, extracted as the base for the v6 transaction and unified-address work (PR1 of 3). The BitGo miniscript fork already has a blake2b_256_personal helper but it is pub(crate) and unreachable from this crate, so we reimplement it here on the blake2 crate (already in the tree transitively; pinned as a direct dep). Includes the block-aligned finalization fix and a variable-length variant (blake2b_var_personal) that F4Jumble needs. Ships with unit tests. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
veetragjain
marked this pull request as ready for review
July 23, 2026 10:20
OttoAllmendinger
approved these changes
Jul 23, 2026
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Shared primitive for Zcash ZIP-243/ZIP-244/ZIP-316 hashing, extracted as the base for the v6 transaction and unified-address work (PR1 of 3).
The BitGo miniscript fork already has a blake2b_256_personal helper but it is pub(crate) and unreachable from this crate, so we reimplement it here on the blake2 crate (already in the tree transitively; pinned as a direct dep). Includes the block-aligned finalization fix and a variable-length variant (blake2b_var_personal) that F4Jumble needs. Ships with unit tests.