Baby Jubjub
A JavaScript library for adding points to the Baby Jubjub curve.
[!NOTE]
This library has been audited as part of the Semaphore V4 PSE audit: https://semaphore.pse.dev/Semaphore_4.0.0_Audit.pdf.
BabyJubJub is an elliptic curve optimized for secure, efficient cryptographic operations in constrained environments like blockchain and zero-knowledge proofs. It's designed for fast, privacy-preserving transactions, balancing cryptographic strength with performance, making it ideal for modern cryptographic solutions.
References
- Barry WhiteHat, Marta Bellés, Jordi Baylina. ERC-2494: Baby Jubjub Elliptic Curve. 2020-01-29. https://eips.ethereum.org/EIPS/eip-2494.
- Barry WhiteHat, Marta Bellés, Jordi Baylina. Baby Jubjub Elliptic Curve. https://docs.iden3.io/publications/pdfs/Baby-Jubjub.pdf
🛠 Install
npm or yarn
Install the @zk-kit/baby-jubjub
package and its peer dependencies with npm:
npm i @zk-kit/baby-jubjub
or yarn:
yarn add @zk-kit/baby-jubjub
CDN
You can also load it using a script
tag using unpkg:
<script src="https://unpkg.com/@zk-kit/baby-jubjub"></script>
or JSDelivr:
<script src="https://cdn.jsdelivr.net/npm/@zk-kit/baby-jubjub"></script>
📜 Usage
import { packPoint, unpackPoint, Base8, mulPointEscalar, Point, addPoint } from "@zk-kit/baby-jubjub"
const p1: Point<bigint> = [BigInt(0), BigInt(1)]
const p2: Point<bigint> = [BigInt(1), BigInt(0)]
const p3 = addPoint(p1, p2)
const secretScalar = addPoint(Base8, p3)
const publicKey = mulPointEscalar(Base8, secretScalar[0])
const packedPoint = packPoint(publicKey)
const unpackedPoint = unpackPoint(packedPoint)
if (unpackedPoint) {
console.log(publicKey[0] === unpackedPoint[0])
console.log(publicKey[1] === unpackedPoint[1])
}