Create a working generator
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Boris Kubiak
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27
README.md
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27
README.md
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# Vanity ETH
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Online ETH vanity address generator
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## Local usage
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Just clone the repo and open `index.html` with your web browser
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## Local development
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Install dependencies
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```sh
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npm i
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```
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Run the watcher to browserify JS as you code
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```sh
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npm run-script watch
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```
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Browserify / babelify /uglify before pushing to production
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```sh
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npm run-script build
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```
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31
gulpfile.js
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gulpfile.js
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const gulp = require('gulp');
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const pump = require('pump');
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const browserify = require('browserify');
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const babel = require('gulp-babel');
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const uglify = require('gulp-uglify');
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const source = require('vinyl-source-stream');
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// Browserify
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gulp.task('browserify', cb => {
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pump([
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browserify('js/index.js').bundle(),
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source('bundle.js'),
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gulp.dest('js')
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], cb);
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});
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// Browserify then babelify, then uglify
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gulp.task('build', ['browserify'], cb => {
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pump([
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gulp.src('js/bundle.js'),
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babel({presets: ['env']}),
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uglify(),
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gulp.dest('js')
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], cb);
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});
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// Watch changes and browserify on the fly
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gulp.task('watch', () => {
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gulp.watch(['js/index.js', 'js/vanity.js'], ['browserify']);
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});
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19
index.html
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index.html
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<!doctype html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport"
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content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
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<meta http-equiv="X-UA-Compatible" content="ie=edge">
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<title>Vanity ETH</title>
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</head>
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<body>
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<input type="text" value="ab" id="pattern">
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<input type="button" id="btn" value="Generate">
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<div id="counter-wrapper">
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<div id="counter"></div>
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</div>
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<div id="result"></div>
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<script src="js/bundle.js" type="text/javascript"></script>
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</body>
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</html>
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1
js/bundle.js
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1
js/bundle.js
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js/index.js
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js/index.js
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/* eslint-env node, browser */
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const vanity = require('./vanity');
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let count = 0;
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const step = 100;
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const counter = document.getElementById('counter');
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const parseInput = () => {
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return {
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pattern: document.getElementById('pattern').value,
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checksum: true
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};
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};
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const incrementCounter = incr => {
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count += incr;
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counter.innerHTML = count.toString() + ' addresses generated';
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};
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const displayResult = result => {
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incrementCounter(result.attempts);
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document.getElementById('result').innerHTML = 'address: ' + result.address + '<br>key: ' + result.privKey;
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};
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const generate = input => {
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const add = vanity.getVanityWallet(input.pattern, input.checksum, step);
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if (add !== null) {
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return displayResult(add);
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}
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incrementCounter(step);
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// Use setTimeout to let the browser render
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setTimeout(() => {
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generate(input);
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}, 0);
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};
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// Add event listener on button
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document.getElementById('btn').addEventListener('click', () => {
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incrementCounter(-count);
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const input = parseInput();
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generate(input);
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});
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73
js/vanity.js
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js/vanity.js
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const ethUtils = require('ethereumjs-util');
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const randomBytes = require('randombytes');
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const ERRORS = {
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invalidHex: 'Invalid hex input'
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};
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/**
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* Create a random wallet from a random private key
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* @returns {{address: string, privKey: string}}
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*/
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const getRandomWallet = () => {
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const randbytes = randomBytes(32);
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return {
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address: '0x' + ethUtils.privateToAddress(randbytes).toString('hex'),
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privKey: randbytes.toString('hex')
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};
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};
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/**
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* Check if a string is valid hexadecimal
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* @param hex
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* @returns {boolean}
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*/
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const isValidHex = hex => hex.length ? /^[0-9A-F]+$/g.test(hex.toUpperCase()) : true;
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/**
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* Check if a wallet respects the input constraints
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* @param wallet
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* @param input
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* @param isChecksum
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* @returns {boolean}
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*/
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const isValidVanityWallet = (wallet, input, isChecksum) => {
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let address = wallet.address;
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address = isChecksum ? ethUtils.toChecksumAddress(address) : address;
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return address.substr(2, input.length) === input;
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};
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/**
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* Generate a lot of wallets until one satisfies the input constraints
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* @param input
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* @param isChecksum
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* @param max - Stop the generation after <max> attempts. Set to 0 for unlimited
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* @returns
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*/
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const getVanityWallet = (input, isChecksum, max) => {
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input = input || '';
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if (!isValidHex(input)) {
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throw new Error(ERRORS.invalidHex);
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}
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input = isChecksum ? input : input.toLowerCase();
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let _wallet = getRandomWallet();
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let attempts = 1;
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while (!isValidVanityWallet(_wallet, input, isChecksum)) {
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_wallet = getRandomWallet();
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attempts++;
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if (max && attempts >= max) {
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return null;
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}
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}
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if (isChecksum) {
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_wallet.address = ethUtils.toChecksumAddress(_wallet.address);
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}
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_wallet.attempts = attempts;
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return _wallet;
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};
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module.exports = {
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getVanityWallet
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};
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2639
package-lock.json
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2639
package-lock.json
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23
package.json
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23
package.json
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{
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"name": "vanity-eth",
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"description": "Online ETH vanity address generator",
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"version": "1.0.0",
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"dependencies": {
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"babel-preset-env": "^1.6.1",
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"browserify": "^14.5.0",
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"ethereumjs-util": "^5.1.2",
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"gulp": "^3.9.1",
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"gulp-babel": "^7.0.0",
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"gulp-uglify": "^3.0.0",
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"pump": "^2.0.0",
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"randombytes": "^2.0.5",
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"vinyl-source-stream": "^1.1.0"
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},
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"license": "ISC",
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"main": "index.js",
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"scripts": {
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"build": "node ./node_modules/gulp/bin/gulp.js build",
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"test": "echo \"Error: no test specified\" && exit 1",
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"watch": "node ./node_modules/gulp/bin/gulp.js watch"
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}
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}
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