Optionaldiscount_The bundle deal discount% that the buyer can get when buying a bundle deal for additional tiers. Need to input it when the bundle deal rule type is 2
Optionaldiscount_The bundle deal discount amount the buyer can save when purchasing a bundle deal. Need to input it when the bundle deal rule type is 3
Optionalfix_The bundle price when the buyers purchase a bundle deal for additional tiers. Need to input it when the bundle deal rule type is 1.
The quantity of items that the buyers need to purchase for additional tier
UpdateBundleDealAdditionalTier sub-interface for UpdateBundleDealRequest