Crate jub_jub

source ·
Expand description

Jubjub Curve

CI crates.io badge Documentation crates.io badge GitHub license codecov dependency status

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