@arc76/bitcoincash

Deterministic ARC76 account derivation for Bitcoin Cash.

Usage

npm i @arc76/bitcoincash --save

import * as bitcoin from "bitcoinjs-lib";
import { encode } from "cashaddrjs";
import { getAccount, getEmailAccount } from "@arc76/bitcoincash";

const account = await getAccount(password); // slot 0, an ECPair keypair
const hash160 = bitcoin.crypto.hash160(Buffer.from(account.publicKey));
const address = encode("bitcoincash", "P2PKH", hash160); // "bitcoincash:q..."
const wif = account.toWIF();

const emailAccount = await getEmailAccount(email, password);

getAccount/getEmailAccount return an ecpair ECPairInterface (the same secp256k1 key type as @arc76/bitcoin — only the address format differs). Use cashaddrjs's encode(...) over the hash160 of the public key for the CashAddr address (bitcoincash:q...), the standard Bitcoin Cash address format since the network-wide 2018 CashAddr migration — not Bitcoin's Base58Check or bech32. .toWIF() gives the private key in the same WIF format Bitcoin uses (WIF doesn't depend on the CashAddr/Base58Check distinction).

Please use a password of at least 50 characters for real accounts — the account's security is entirely the password's security.

⚠️ Same-curve chains share the literal same private key. @arc76/bitcoin, @arc76/bitcoincash, and @arc76/ethereum derive the identical secp256k1 private key from the same password/email/slot — leaking the key on one of those chains leaks it on all of them. Use a different password (or slot) per chain if you need isolation.