BLS Keygen

Utility functions for generating BLS secret keys, built for NodeJs and Browser.

• Create a master key from BIP-39 mnemonic or entropy.
• Create a derived child key from BIP-39 mnemonic, entropy, or a master key.
• Create Eth2 validator keys from a master key.

Implementation follows EIPS: EIP-2334, EIP-2333

For low-level EIP-2333 and EIP-2334 functionality, see @chainsafe/bls-hd-key.

Examples

import {
    generateRandomSecretKey,
    deriveKeyFromMnemonic,
    deriveKeyFromEntropy,
    deriveKeyFromMaster,
    deriveEth2ValidatorKeys,
} from "@chainsafe/bls-keygen";

// random secret key
const secretKey = generateRandomSecretKey();

...

// secret key from mnemonic and optional EIP-2334 path
const masterSecretKey = deriveKeyFromMnemonic(
  "impact exit example acquire drastic cement usage float mesh source private bulb twenty guitar neglect",
);

const childSecretKey = deriveKeyFromMnemonic(
  "impact exit example acquire drastic cement usage float mesh source private bulb twenty guitar neglect",
  "m/12381/3600/0/0"
);

...

// secret key from entropy and optional EIP-2334 path
const masterSecretKey = deriveKeyFromEntropy(entropy);

const childSecretKey = deriveKeyFromEntropy(
  entropy,
  "m/12381/3600/0/0"
);


...

// child secret key from master secret key and EIP-2334 path
const childSecretKey = deriveKeyFromMaster(
  masterSecretKey,
  "m/12381/3600/0/0"
);

...

// create multiple eth2 validator keys from a master secret key
const keys0 = deriveEth2ValidatorKeys(masterSecretKey, 0);
const keys1 = deriveEth2ValidatorKeys(masterSecretKey, 1);

const { signing, withdrawal } = keys0;

Contribution

Requirements:

• nodejs
• yarn

    yarn install
    yarn run test

Audit

This repo was audited by Least Authority as part of this security audit, released 2020-03-23. Commit 32b068 verified in the report.

License

Apache-2.0