j-bsv

J-BSV

BitcoinSV Custodial & non-Custodial Wallets | Threshold signature

Getting started

npm i j-bsv

import { Custodial_Wallet, Non_Custodial_Wallet } from 'j-bsv';

Custodial Wallet

Generate wallet

Master wallet(HD)
const [mnemonic, wallet] = Custodial_Wallet.fromRandom('main'); // main network
const [mnemonic, wallet] = Custodial_Wallet.fromRandom('test'); // test network

Import from mnemonic

const 
    mnemonic = "teach scatter sample solar casino festival decrease pause random drip memory mystery",
    wallet = Custodial_Wallet.fromMnemonic('main', mnemonic);

Import from seed

const 
    seed = "000102030405060708090a0b0c0d0e0f",
    wallet = Custodial_Wallet.fromSeed('main', seed);

Password

const [mnemonic, wallet] = Custodial_Wallet.fromRandom('main', 'password123');
// ...
const wallet = Custodial_Wallet.fromMnemonic('main', mnemonic, 'password123');
// Incorrect password returns random wallet

Derive child

wallet.derive("m/0", 'pri');

Public Keys can't derive from a hardend path
wallet.derive("m/0'", 'pub'); // Throws Error

Signature

sign
const {sig, serialized_sig, msgHash, recovery_id} = wallet.sign('hello world');

verfiy siganture
wallet.verifySig(sig, msgHash); // true

Non-Custodial Wallet

Generate wallet

const wallet = Non_Custodial_Wallet.fromRandom("main", 3, 2); // main network
const wallet = Non_Custodial_Wallet.fromRandom("test", 3, 2); // test network

Import from shares

const shares = [
    '79479395a59a8e9d930f2b10ccd5ac3671b0ff0bf8a66aaa1d74978c5353694b',
    '98510126c920e18b148130ac1145686cb299d21f0e010b98ede44169a7bb1c13',
    'b75a6eb7eca7347895f3364755b524a2f382a532235bac87be53eb46fc22cedb'
  ]

const wallet = Non_Custodial_Wallet.fromShares("main", shares, 2);

Shares

const share_for_each_participant = wallet.getShares();

Restore private key

const groups_prikey = wallet.restore_pri_key();

Signature

sign
const { sig, serialized_sig, msgHash, recovery_id } = wallet.sign("hello world");

verfiy siganture
wallet.verifySig(sig, msgHash); // true