code: function magic(buf, cb) {
    setTimeout(() => {
      const sampleLength = 24;
      const sample = buf.slice(0, sampleLength).toString('hex'); // lookup data
  
      const found = Object.keys(_magicDb2.default).find(it => {
        return sample.indexOf(it) != -1;
      });
  
      if (found) {
        cb(null, _magicDb2.default[found]);
      } else {
        cb(new Error('Magic number not found'));
      }
    }, 0);
  }
docs: Lookup the magic number in magic-number DB
  @param {Buffer} buf Data buffer
  @param {function} cb Callback to invoke on completion