code: function(bid) {
      return !!(bid.params.slot && bid.params.adkey && bid.params.ad_size);
    }
docs: Lifestreet supports banner and video media types 
  Determines whether or not the given bid request is valid.
  
  @param {BidRequest} bid The bid params to validate.
  @return boolean True if this is a valid bid, and false otherwise.