Engineering

The major engineering efforts inside Zakura: what each one changes, why it matters, and where it stands.

Cryptography · Landed

Position-Weighted Sinsemilla

Ironwood and Orchard hash the internal nodes of their note commitment trees with Sinsemilla, a Pedersen-hash variant that wallets evaluate to keep funds spendable and full nodes evaluate many times for every block. Every parent hash has exactly 52 words, so every doubling can move into a precomputed position-weighted table, leaving one mixed addition per word: about 3.5× faster in our benchmarks.

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Cryptography · In development

Batch Affine Ladders with Eisenstein Recoding

Wallet scanning multiplies every incoming point by the same secret viewing key. Recoding that key once as a single Eisenstein integer, then sharing batched inversions across a wide affine ladder, benchmarks 16–20% faster than the current GLV approach in batch trial decryption at 64 outputs and up.

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