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Add BW6-767 curve and update BW6-761 to use the new bw6 model #156

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merged 16 commits into from
Sep 1, 2023

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@swasilyev swasilyev commented Mar 27, 2023

Completes #154, requires arkworks-rs/algebra#633


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mmagician and others added 13 commits March 8, 2023 11:59
use bls12-381 instead of 377 for test imports

fix the inline comments with correct name and params


Set the right base field


Equation for base curve is y2 = x3 + 1


fill in pairing params


adapt sage scripts with correct moduli


calculate the correct cubic non residue


correct the parameter B in the curve equation


remove the specialized method for mult by nonresidue

nonresidue is two, so default will be doubling

calculate more correct parameters for fq3

`TRACE_MINUS_ONE_DIV_TWO` and `QUADRATIC_NONRESIDUE_TO_T`

compute the right fq3 & fp6 frobenious coefficients


calculate the cofactor for g1


use the g1 generator from gnark's fork


use the right g2 equation


g2 cofactor is slightly smaller than g1 cofactor


get the g2 generators from gnark's fork


update g1 and g2 curve info in the comments


fill in `COFACTOR_INV` value for g1


fill in `COFACTOR_INV` value for g2
author information
2-adicity of the scalar field
2. Curve specific hard part of the final exp moved from algebra
2. Miller loop params changed to the "unoptimized" version
@mmagician mmagician changed the title BW6-767 Add BW6-767 curve and update BW6-761 to use the new bw6 model Mar 31, 2023
@mmagician mmagician mentioned this pull request Mar 31, 2023
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Comment on lines +20 to +33
const X: BigInteger = BigInt::new([
0xd201000000010000,
0x0,
0x0,
0x0,
0x0,
0x0,
0x0,
0x0,
0x0,
0x0,
0x0,
0x0,
]);
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We can use the BigInt macro to avoid having to do this manual specification. Though right now the macro does not handle hexadecimal inputs. I can submit a PR for this though.

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@swasilyev you should be able to now use updated macro from Pratyush's new PR in algebra: arkworks-rs/algebra#635

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We've discussed with @swasilyev to leave it as-is in this PR, and later to submit another PR where we use the macro for ALL curves.

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Created an issue for this: #169

@mmagician mmagician merged commit 7e58260 into arkworks-rs:master Sep 1, 2023
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3 participants