import "Ads.txt.sol";

contract RTB {
  function makeBidRequest(address resellerId, address publisherId, uint256 floor) {
    Ads_txt adsTxt = Ads_txt.at(0xABCDED)
    // check that this seller is authorized to represent this publisher id...
    Publisher publisher = adsTxt.publishers[publisherId]
    require(address(publisher.id) != address(0x0), "Publisher is not registered");
    Reseller reseller = adsTxt.resellers[publisherId][resellerId]
    require(address(reseller.id) != address(0x0), "Resller is not registered for the given publisher");
    // ... make bids!
  }
}