create-xpub
Create a BIP32 extended public key
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'
});
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'
});
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