pull(
  ssb.createFeedStream(),
  pull.reduce(function (acc, item) {
    if (item.message) {
      var vote = parseInt(item.message.toString(), 10);
      if (!isNaN(vote)) {
        console.log('vote: ', vote);
        return acc + vote;
      } else {
        return 0;
      }
    }
  }, 0, function (err, result) {
    console.log('result: ', result);
  })
);