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swasilyev avatar swasilyev commented on August 16, 2024

It's not my insight. Section A.3.3 of Zcash Protocol Specification describes circuits for original (Zcash) jubjub arithmetic. Their design is highly optimized and, what can be more important, reviewed.

from ethsnarks.

HarryR avatar HarryR commented on August 16, 2024

Non-normative note: The last two constraints can be combined into d*uu*vv = a*uu + vv − 1. The Sapling circuit does not use this.

However, there is lots that I can implement from the Zcash specification.

I feel that this project is lacking documentation, and has lots to be desired in comparison to the Zcash specification.

from ethsnarks.

HarryR avatar HarryR commented on August 16, 2024

This has been implemented in #74

I am reviewing the Zcash Sapling specification for further improvements. I think some of the improvements can't be used because of the parameters of the Baby JubJub curve (e.g. the optimisation where a=-1)

from ethsnarks.

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