bip32.spec.ts

import * as assert from 'assert';
import * as bip32 from 'bip32';
import * as bip39 from 'bip39';
import { describe, it } from 'mocha';
import * as bitcoin from '../..';

function getAddress(node: any, network?: any): string {
  return bitcoin.payments.p2pkh({ pubkey: node.publicKey, network }).address!;
}

describe('bitcoinjs-lib (BIP32)', () => {
  it('can import a BIP32 testnet xpriv and export to WIF', () => {
    const xpriv =
      'tprv8ZgxMBicQKsPd7Uf69XL1XwhmjHopUGep8GuEiJDZmbQz6o58LninorQAfcKZWARbtRtfnLcJ5MQ2AtHcQJCCRUcMRvmDUjyEmNUWwx8UbK';
    const node = bip32.fromBase58(xpriv, bitcoin.networks.testnet);

    assert.strictEqual(
      node.toWIF(),
      'cQfoY67cetFNunmBUX5wJiw3VNoYx3gG9U9CAofKE6BfiV1fSRw7',
    );
  });

  it('can export a BIP32 xpriv, then import it', () => {
    const mnemonic =
      'praise you muffin lion enable neck grocery crumble super myself license ghost';
    const seed = bip39.mnemonicToSeedSync(mnemonic);
    const node = bip32.fromSeed(seed);
    const strng = node.toBase58();
    const restored = bip32.fromBase58(strng);

    assert.strictEqual(getAddress(node), getAddress(restored)); // same public key
    assert.strictEqual(node.toWIF(), restored.toWIF()); // same private key
  });

  it('can export a BIP32 xpub', () => {
    const mnemonic =
      'praise you muffin lion enable neck grocery crumble super myself license ghost';
    const seed = bip39.mnemonicToSeedSync(mnemonic);
    const node = bip32.fromSeed(seed);
    const strng = node.neutered().toBase58();

    assert.strictEqual(
      strng,
      'xpub661MyMwAqRbcGhVeaVfEBA25e3cP9DsJQZoE8iep5fZSxy3TnPBNBgWnMZx56oreNc48ZoTkQfatNJ9VWnQ7ZcLZcVStpaXLTeG8bGrzX3n',
    );
  });

  it('can create a BIP32, bitcoin, account 0, external address', () => {
    const path = "m/0'/0/0";
    const root = bip32.fromSeed(
      Buffer.from(
        'dddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd',
        'hex',
      ),
    );

    const child1 = root.derivePath(path);

    // option 2, manually
    const child1b = root
      .deriveHardened(0)
      .derive(0)
      .derive(0);

    assert.strictEqual(
      getAddress(child1),
      '1JHyB1oPXufr4FXkfitsjgNB5yRY9jAaa7',
    );
    assert.strictEqual(
      getAddress(child1b),
      '1JHyB1oPXufr4FXkfitsjgNB5yRY9jAaa7',
    );
  });

  it('can create a BIP44, bitcoin, account 0, external address', () => {
    const root = bip32.fromSeed(
      Buffer.from(
        'dddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd',
        'hex',
      ),
    );

    const child1 = root.derivePath("m/44'/0'/0'/0/0");

    // option 2, manually
    const child1b = root
      .deriveHardened(44)
      .deriveHardened(0)
      .deriveHardened(0)
      .derive(0)
      .derive(0);

    assert.strictEqual(
      getAddress(child1),
      '12Tyvr1U8A3ped6zwMEU5M8cx3G38sP5Au',
    );
    assert.strictEqual(
      getAddress(child1b),
      '12Tyvr1U8A3ped6zwMEU5M8cx3G38sP5Au',
    );
  });

  it('can create a BIP49, bitcoin testnet, account 0, external address', () => {
    const mnemonic =
      'abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon about';
    const seed = bip39.mnemonicToSeedSync(mnemonic);
    const root = bip32.fromSeed(seed);

    const path = "m/49'/1'/0'/0/0";
    const child = root.derivePath(path);

    const { address } = bitcoin.payments.p2sh({
      redeem: bitcoin.payments.p2wpkh({
        pubkey: child.publicKey,
        network: bitcoin.networks.testnet,
      }),
      network: bitcoin.networks.testnet,
    });
    assert.strictEqual(address, '2Mww8dCYPUpKHofjgcXcBCEGmniw9CoaiD2');
  });

  it('can use BIP39 to generate BIP32 addresses', () => {
    // var mnemonic = bip39.generateMnemonic()
    const mnemonic =
      'praise you muffin lion enable neck grocery crumble super myself license ghost';
    assert(bip39.validateMnemonic(mnemonic));

    const seed = bip39.mnemonicToSeedSync(mnemonic);
    const root = bip32.fromSeed(seed);

    // receive addresses
    assert.strictEqual(
      getAddress(root.derivePath("m/0'/0/0")),
      '1AVQHbGuES57wD68AJi7Gcobc3RZrfYWTC',
    );
    assert.strictEqual(
      getAddress(root.derivePath("m/0'/0/1")),
      '1Ad6nsmqDzbQo5a822C9bkvAfrYv9mc1JL',
    );

    // change addresses
    assert.strictEqual(
      getAddress(root.derivePath("m/0'/1/0")),
      '1349KVc5NgedaK7DvuD4xDFxL86QN1Hvdn',
    );
    assert.strictEqual(
      getAddress(root.derivePath("m/0'/1/1")),
      '1EAvj4edpsWcSer3duybAd4KiR4bCJW5J6',
    );
  });
});