Keybase WarpWallet Bounty Challenge

bounty.js

var attempts = [];
var attemptCount = 0;
let simultaneousCount = 10;
var found = false;

function randomString(length, chars) 
{
  var result = '';
  for (var i = length; i > 0; --i) result += chars[Math.floor(Math.random() * chars.length)];
  return result;
}
function searchWallet() 
{
  var attempt;
  var foundNewAttempt = false;
  
  while(!foundNewAttempt)
  {
    attempt = randomString(8,'0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ');
    if(attempts.indexOf(attempt) == -1)
    {
      foundNewAttempt = true;
      attempts.push(attempt);
      attemptCount++;
    }
  }
  
  console.log('trying passphrase: ' + attempt + ' (attempt-count: ' + attemptCount + ')');
  
  warpwallet.run({
    passphrase: attempt,
    salt: '[email protected]',
    progress_hook: (function(_this) 
    {
      return function(o) 
      {
        return false;
      };
    })(this),
    params: window.params
  }, 
  (function(_this) 
  {
    return function(res) 
    {
      if ( res["public"] == '1MkupVKiCik9iyfnLrJoZLx9RH4rkF3hnA' ) 
      {
        console.log('You found it! =D');
        console.log(res["public"]);
        console.log(res["private"]);
        found = true;
      } 
      else 
      {
        console.log('Out of luck...')
        if(!found)
        {
          searchWallet();
        }
      }
    };
  })(this));
}

for(var i=0; i<simultaneousCount; i++)
{
  setTimeout(searchWallet, 1);
}