bip39-brute.js

// https://www.reddit.com/r/ethdev/comments/7jyzlw/50_in_ether_prize_for_puzzle_in_this_tweet/
// npm i bip39 ethereumjs-wallet allcombinations shuffle-array

const bip39 = require("bip39");
const hdkey = require('ethereumjs-wallet/hdkey');
const allcombinations = require('allcombinations');
const shuffle = require('shuffle-array');

let words = 'bright summer public tenant avocado chef depend romance school reason help start';
 
let allCombinationsGenerator = allcombinations(shuffle(words.split(' ')));

let total = 0, totalok = 0;;

for (let comb of allCombinationsGenerator) {
  total++;

  let joined = comb.join(' ');
  let valid = bip39.validateMnemonic(joined);
  if (!valid) continue;
  totalok++;

  if (totalok % 1000 === 0) console.log(`${totalok}/${total}`);

  let hdwallet = hdkey.fromMasterSeed(bip39.mnemonicToSeed(joined));
  let wallet = hdwallet.derivePath("m/44'/60'/0'/0").getWallet();
 
  if (wallet.getAddress().toString("hex") === '684c2a81a42e3511c9961eeb93e31c4890b07e0f') {
    console.log(joined);
    process.exit(0);
  }
}