Ethereum-bip44 NPM

Ethereum-Bip44

Library to generate Ethereum addresses from a hierarchical deterministic wallet according to the BIP44 standard.

Internally it uses bitcore for the deterministic private and public keys which allows to use many additional features like deriving Ethereum address from mnemonic backups (BIP32).

Getting Started

npm install ethereum-bip44

Create a new wallet:

var bitcore = require('bitcore-lib');
var EthereumBip44 = require('ethereum-bip44');
// create a new master private key
var key = bitcore.HDPrivateKey();
// create the hd wallet
var wallet = new EthereumBip44(key);
// output the first address
console.log(wallet.getAddress(0));
// output the second address
console.log(wallet.getAddress(1));

Initialize from an existing private seed:

var bitcore = require('bitcore-lib');
var EthereumBip44 = require('ethereum-bip44');
// create the hd wallet
var wallet = EthereumBip44.fromPrivateSeed('xprv9s21ZrQH143K4BX2reUURqR54XkNhbNkFhEiRQqFkzu5z7T1dp9eMGozFTgKVu5Bs6R8Wd8BuhcJ3rj3LvzJvkc9uBc5xdhstRfJgcTLsjk');
// output the first address
console.log(wallet.getAddress(0));
// output the second address
console.log(wallet.getAddress(1));

Initialize it from a public seed, for example on hot wallets that don't hold private keys:

var bitcore = require('bitcore-lib');
var EthereumBip44 = require('ethereum-bip44');
var key = new bitcore.HDPrivateKey();
var derivedPubKey = key.derive("m/44'/60'/0'/0").hdPublicKey;
// create the hd wallet
var wallet = EthereumBip44.fromPublicSeed(derivedPubKey.toString());
// output the first address
console.log(wallet.getAddress(0));
// output the second address
console.log(wallet.getAddress(1));

Note: You need to use a derived public key like shown here, otherwise it won't allow to derive hardened keys.