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Create a working generator

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Boris Kubiak 2017-12-21 19:45:22 +01:00
parent 328e7004b6
commit 1e57ee158d
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README.md Normal file
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# Vanity ETH
Online ETH vanity address generator
## Local usage
Just clone the repo and open `index.html` with your web browser
## Local development
Install dependencies
```sh
npm i
```
Run the watcher to browserify JS as you code
```sh
npm run-script watch
```
Browserify / babelify /uglify before pushing to production
```sh
npm run-script build
```

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const gulp = require('gulp');
const pump = require('pump');
const browserify = require('browserify');
const babel = require('gulp-babel');
const uglify = require('gulp-uglify');
const source = require('vinyl-source-stream');
// Browserify
gulp.task('browserify', cb => {
pump([
browserify('js/index.js').bundle(),
source('bundle.js'),
gulp.dest('js')
], cb);
});
// Browserify then babelify, then uglify
gulp.task('build', ['browserify'], cb => {
pump([
gulp.src('js/bundle.js'),
babel({presets: ['env']}),
uglify(),
gulp.dest('js')
], cb);
});
// Watch changes and browserify on the fly
gulp.task('watch', () => {
gulp.watch(['js/index.js', 'js/vanity.js'], ['browserify']);
});

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<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Vanity ETH</title>
</head>
<body>
<input type="text" value="ab" id="pattern">
<input type="button" id="btn" value="Generate">
<div id="counter-wrapper">
<div id="counter"></div>
</div>
<div id="result"></div>
<script src="js/bundle.js" type="text/javascript"></script>
</body>
</html>

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/* eslint-env node, browser */
const vanity = require('./vanity');
let count = 0;
const step = 100;
const counter = document.getElementById('counter');
const parseInput = () => {
return {
pattern: document.getElementById('pattern').value,
checksum: true
};
};
const incrementCounter = incr => {
count += incr;
counter.innerHTML = count.toString() + ' addresses generated';
};
const displayResult = result => {
incrementCounter(result.attempts);
document.getElementById('result').innerHTML = 'address: ' + result.address + '<br>key: ' + result.privKey;
};
const generate = input => {
const add = vanity.getVanityWallet(input.pattern, input.checksum, step);
if (add !== null) {
return displayResult(add);
}
incrementCounter(step);
// Use setTimeout to let the browser render
setTimeout(() => {
generate(input);
}, 0);
};
// Add event listener on button
document.getElementById('btn').addEventListener('click', () => {
incrementCounter(-count);
const input = parseInput();
generate(input);
});

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const ethUtils = require('ethereumjs-util');
const randomBytes = require('randombytes');
const ERRORS = {
invalidHex: 'Invalid hex input'
};
/**
* Create a random wallet from a random private key
* @returns {{address: string, privKey: string}}
*/
const getRandomWallet = () => {
const randbytes = randomBytes(32);
return {
address: '0x' + ethUtils.privateToAddress(randbytes).toString('hex'),
privKey: randbytes.toString('hex')
};
};
/**
* Check if a string is valid hexadecimal
* @param hex
* @returns {boolean}
*/
const isValidHex = hex => hex.length ? /^[0-9A-F]+$/g.test(hex.toUpperCase()) : true;
/**
* Check if a wallet respects the input constraints
* @param wallet
* @param input
* @param isChecksum
* @returns {boolean}
*/
const isValidVanityWallet = (wallet, input, isChecksum) => {
let address = wallet.address;
address = isChecksum ? ethUtils.toChecksumAddress(address) : address;
return address.substr(2, input.length) === input;
};
/**
* Generate a lot of wallets until one satisfies the input constraints
* @param input
* @param isChecksum
* @param max - Stop the generation after <max> attempts. Set to 0 for unlimited
* @returns
*/
const getVanityWallet = (input, isChecksum, max) => {
input = input || '';
if (!isValidHex(input)) {
throw new Error(ERRORS.invalidHex);
}
input = isChecksum ? input : input.toLowerCase();
let _wallet = getRandomWallet();
let attempts = 1;
while (!isValidVanityWallet(_wallet, input, isChecksum)) {
_wallet = getRandomWallet();
attempts++;
if (max && attempts >= max) {
return null;
}
}
if (isChecksum) {
_wallet.address = ethUtils.toChecksumAddress(_wallet.address);
}
_wallet.attempts = attempts;
return _wallet;
};
module.exports = {
getVanityWallet
};

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{
"name": "vanity-eth",
"description": "Online ETH vanity address generator",
"version": "1.0.0",
"dependencies": {
"babel-preset-env": "^1.6.1",
"browserify": "^14.5.0",
"ethereumjs-util": "^5.1.2",
"gulp": "^3.9.1",
"gulp-babel": "^7.0.0",
"gulp-uglify": "^3.0.0",
"pump": "^2.0.0",
"randombytes": "^2.0.5",
"vinyl-source-stream": "^1.1.0"
},
"license": "ISC",
"main": "index.js",
"scripts": {
"build": "node ./node_modules/gulp/bin/gulp.js build",
"test": "echo \"Error: no test specified\" && exit 1",
"watch": "node ./node_modules/gulp/bin/gulp.js watch"
}
}