Crate jub_jub

Jubjub Curve

This crate provides jubjub curve arithmetic and also supports fully no_std and parity-scale-codec.

Specification

The Jubjub curve is one of twisted edwards curve.

• Twisted Edwards Curve

$$ ax^2 + y^2 = 1 + dx^2y^2 $$

• Addition Law

$$ (x_3 = \frac{x_1y_1 + y_1x_1}{1 + dx_1x_1y_1y_1}, y_3 = \frac{y_1y_1 + ax_1x_1}{1 - dx_1x_1y_1y_1}) $$

Test

$ cargo test

Structs

Fp

Twisted Edwards curve Jubjub base field

Fr

Bls12 381 curve scalar field

JubjubAffine

Twisted Edwards curve Jubjub affine coordinate

JubjubExtended

Twisted Edwards curve Jubjub extended coordinate

Constants

EDWARDS_D

Twisted Edwards curve Jubjub D params

Functions

compute_windowed_naf

wNAF expression computation over field