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[![Build Status](https://travis-ci.org/ChainSafe/lodestar.svg?branch=master)](https://travis-ci.org/ChainSafe/lodestar) [![Build Status](https://travis-ci.org/ChainSafe/lodestar.svg?branch=master)](https://travis-ci.org/ChainSafe/lodestar)
[![codecov](https://codecov.io/gh/ChainSafe/lodestar/branch/master/graph/badge.svg)](https://codecov.io/gh/ChainSafe/lodestar) [![codecov](https://codecov.io/gh/ChainSafe/lodestar/branch/master/graph/badge.svg)](https://codecov.io/gh/ChainSafe/lodestar)
![ETH2.0_Spec_Version 0.12.0](https://img.shields.io/badge/ETH2.0_Spec_Version-0.12.0-2e86c1.svg) ![ETH2.0_Spec_Version 1.0.0](https://img.shields.io/badge/ETH2.0_Spec_Version-1.0.0-2e86c1.svg)
![ES Version](https://img.shields.io/badge/ES-2017-yellow) ![ES Version](https://img.shields.io/badge/ES-2017-yellow)
![Node Version](https://img.shields.io/badge/node-12.x-green) ![Node Version](https://img.shields.io/badge/node-12.x-green)
Javascript library for BLS (Boneh-Lynn-Shacham) signatures and signature aggregation. Javascript library for BLS (Boneh-Lynn-Shacham) signatures and signature aggregation, tailored for use in Eth2.
## Usage ## Usage
@ -23,17 +23,24 @@ yarn add @chainsafe/bls @chainsafe/blst
You must initialize the library once in your application before using it. The result is cached and use across all your imports You must initialize the library once in your application before using it. The result is cached and use across all your imports
```ts ```ts
import bls, {init} from "@chainsafe/bls"; import {init, SecretKey, secretKeyToPublicKey, sign, verify} from "@chainsafe/bls";
(async () => { (async () => {
await init("herumi"); await init("herumi");
const secretKey = bls.PrivateKey.fromKeygen(); // class-based interface
const secretKey = SecretKey.fromKeygen();
const publicKey = secretKey.toPublicKey(); const publicKey = secretKey.toPublicKey();
const message = new Uint8Array(32); const message = new Uint8Array(32);
const signature = secretKey.sign(message); const signature = secretKey.sign(message);
console.log("Is valid: ", signature.verify(publicKey, message)); console.log("Is valid: ", signature.verify(publicKey, message));
// functional interface
const sk = secretKey.toBytes();
const pk = secretKeyToPublicKey(sk);
const sig = sign(sk, message);
console.log("Is valid: ", verify(pk, message, sig));
})(); })();
``` ```
@ -66,12 +73,12 @@ yarn add @chainsafe/bls @chainsafe/blst
``` ```
```ts ```ts
import bls from "@chainsafe/bls"; import {init} from "@chainsafe/bls";
try { try {
await bls.init("blst-native"); await init("blst-native");
} catch (e) { } catch (e) {
await bls.init("herumi"); await init("herumi");
console.warn("Using WASM"); console.warn("Using WASM");
} }
``` ```
@ -80,13 +87,14 @@ The API is identical for all implementations.
## Spec versioning ## Spec versioning
| Version | Bls spec version | | Version | Bls spec hash-to-curve version |
| ------- | :--------------: | | ------- | :--------------: |
| 5.x.x | draft #9 |
| 2.x.x | draft #7 | | 2.x.x | draft #7 |
| 1.x.x | draft #6 | | 1.x.x | draft #6 |
| 0.3.x | initial version | | 0.3.x | initial version |
> [spec](https://github.com/ethereum/eth2.0-specs/blob/v0.11.1/specs/phase0/beacon-chain.md#bls-signatures) > [spec](https://github.com/ethereum/eth2.0-specs/blob/v1.0.0/specs/phase0/beacon-chain.md#bls-signatures)
> [test vectors](https://github.com/ethereum/eth2.0-spec-tests/tree/master/tests/bls) > [test vectors](https://github.com/ethereum/eth2.0-spec-tests/tree/master/tests/bls)