Merchant Wallet

HD Wallet + QR Code Generator

Generate secure (unique) per-customer Payment Addresses (PubKeyHash) and QR Codes for receiving payments via Digital Cash (Dash, or similar).

    ====== [DASH] (Derived) Public Key Hash ======

       DASH: XcsLKywcU85QginxhJNYibJc3j4Aawa41Q

Use this library and included tools to generate a private key, and an "extended" public key, which will allow you to create payment addresses on your server without storing your private key on your server.

Watch the Video

https://youtu.be/Q01nLQ74xUI

Features

• QuickStart
  • [x] Get a Wallet and "Extended" Public Key
  • [x] Generate Payment QR Codes
  • [x] Generate WIFs & QR Codes
    (for importing private keys)
• Config
  • [x] Generate Passphrase
  • [x] Generate XPub Key
• Tools for Exploring & Debugging
  • [x] Payment Addresses via Private Key & XPub Key
  • [x] QR Codes for Payment Addresses
  • [x] QR Codes (WIF) for Payment import

Usage & QuickStart

npm install --save @root/merchant-wallet

Create XPub Key

"use strict";

require("dotenv").config({ path: ".env" });
require("dotenv").config({ path: ".env.secret" });

let Coins = require("@root/merchant-wallet/lib/coins.json");
let Wallet = require("@root/merchant-wallet").Wallet;

let wallet = Wallet.create(Coins.dash);

// The mnemonic *is* the wallet, more or less
// (it can be used by any wallet app)
let mnemonic = process.env.BASE2048_PASSPHRASE;

let xpubkey = await wallet.xpubKeyFromMnemonic(mnemonic);

Generate Payment Addrs & QR Codes

let index = 0;
let amount = 0.01;

let paymentAddr = await wallet.addrFromXPubKey(xpubKey, index);
let qr = await wallet.qrFromXPubKey(xpubKey, index, amount, { format: "svg" });
let qrAscii = await wallet.qrFromXPubKey(xpubKey, index, amount, {
  format: "ascii",
});

console.info(`Wallet Import Format for Private Key:\n${wifQrAscii}`);
console.info(`${wif}`);

Generate Private Key WIFs & QR Codes

let index = 0;

let wif = await wallet.wifFromMnemonic(mnemonic, index);
let wifQr = await wallet.wifQrFromMnemonic(mnemonic, index, {
  format: "svg",
});
let wifQrAscii = await wallet.wifQrFromMnemonic(mnemonic, index, {
  format: "ascii",
});

console.info(`Wallet Import Format for Private Key:\n${wifQrAscii}`);
console.info(`${wif}`);

Config

See ./example.env.

1. Add your wallet passphrase (mnemonic) to .env.secret as BASE2048_PASSPHRASE, or generate a new one:

   bash bin/mnemonic-to-secret-env.sh

2. Add your xpub (extended public) key to .env as XPUB_KEY, or generate it from the existing ENVs:

   bash bin/xpubkey-to-env.sh

Examples

.env:

WALLET_TYPE=dash
XPUB_KEY=xpub6EVfukfarxzs7NhxQbMQybLvsfLDEYrex5SdDsEuZ7oddnPxaLSW4wX9ZAR5zVYSFnxAum6oiSH4CYmLvJrpe75NXNnVuyWGoz9vdNcwGVJ

.env.secret:

BASE2048_PASSPHRASE="peanut valley bargain affair zebra antenna govern bind myth doll weekend elbow"

Exploring & Debugging

git clone https://github.com/therootcompany/merchant-wallet.js.git
pushd ./merchant-wallet.js/

Passphrase (mnemonic) + Extended Public Key (xpub)

# Create a passphrase / mnemonic
bash bin/mnemonic-to-secret-env.sh

# See derived keys
node bin/derive-xpub-key.js

Generate Payment Addresses & QR Codes

• index should start from 0 and count up sequentially
• amount is optional for Dash

# node bin/addr-from-xpub.js <customer-index> <amount>
node bin/addr-from-xpub.js 0

Generate Wallet Import Addresses & QR Codes

From the Dash app you can choose "Send" to scan a wallet (private key) and send the money to your primary wallet.

node bin/wif-from-mnemonic.js 0