code: function isBidRequestValid(bid) {
    if (typeof bid === 'undefined' || bid.bidder !== BIDDER_CODE || typeof bid.params === 'undefined') {
      return false;
    }
  
    if (typeof bid.params.pubId !== 'string' || bid.sizes === 'undefined' || bid.sizes.length === 0) {
      return false;
    }
  
    return true;
  }
docs: ======= Object BidRequest  .params required    .pubId:  string optional    .type: "BANNER" | "VIDEO" | "NATIVE"  --> only BANNER at present 
  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.