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  • License MIT

Create a BIP32 extended public key

Package Exports

  • create-xpub

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (create-xpub) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

create-xpub

Create a BIP32 extended public key

Build Status Coverage Status npm

Creates a Base58 encoded extended public key (xpub) for use in a BIP32 hierarchical deterministic wallet.

Install

npm install create-xpub

Usage

You should familiarise yourself with BIP32 to understand what these arguments represent.

const createXpub = require('create-xpub');

const xpub = createXpub({
  depth: 3,
  childNumber: 2147483648,
  chainCode: '84cf7d9029cdd9fcadbb3717fd92ec0db7d7d9787c57c13c08fc887c389b566b',
  publicKey: '048bcdcf59f046b13f1eb35b608d1211265fde8cc44fc7a5a7f7107c5cf238095328a0e0d7be17c7d3e48490e8c6433af6d2c3dacc687f3fecaa98a3d05f17de97'
});
// => 'xpub6CgMcBZk66ayM9ESh7QtBmRKJbsa6rBeBH2k4aQZQJGossryP5r2N2nQS4hBMG1wb8igPoH53bxtzTBaeMqJkbu8bxsih1gGkoAn23Nr8VP'

Pass in version bytes for a different network:

const createXpub = require('create-xpub');

const tpub = createXpub({
  networkVersion: createXpub.testnet,
  depth: 3,
  childNumber: 2147483648,
  chainCode: '84cf7d9029cdd9fcadbb3717fd92ec0db7d7d9787c57c13c08fc887c389b566b',
  publicKey: '048bcdcf59f046b13f1eb35b608d1211265fde8cc44fc7a5a7f7107c5cf238095328a0e0d7be17c7d3e48490e8c6433af6d2c3dacc687f3fecaa98a3d05f17de97'
});
// => 'tpubDD3z8RPRoNYRcwRJ9JPyPgkgdiyE6Eghiud3R8ThkD2hdAXgTJh7WUTEg6mxskyBP3Fb1NnwahnwgdgC3DgYe3MRfZd2NYLWLkmBn7UWZXk'

Tip

If you're working with ledgerjs you can pass the output of getWalletPublicKey() almost directly in.

API

createXpub(options)

Returns a Base58 encoded extended public key.

options

Type: Object

An object containing the following properties of the derivation path.

Consult BIP32 for an in-depth explanation on these properties.

networkVersion

Type: number
Default: 0x0488B21E (mainnet)

Network version bytes.

depth

Type: number
Default: undefined

The depth of the derived key.

childNumber

Type: number
Default: undefined

The child number.

chainCode

Type: string
Default: undefined

The chain code.

publicKey

Type: string
Default: undefined

The public key in compressed or uncompressed form.

createXpub.mainnet

Mainnet (xpub) version bytes: 0x0488B21E

createXpub.testnet

Testnet (tpub) version bytes: 0x043587CF

License

MIT © Luke Childs