Ideas

When adding an item to the cart, there are cases where you need to set a custom price. This is currently not possible without a work-around.

One solution is to decorate IPriceCalculator, but this calculation would not have any context regarding the actual add request, only what is passed along in PriceCalculatorItemArgs. Another solution is to decorate ISalesOrderRowFactory, but this is only triggered when adding a new item, never on update. Also, the create method in ISalesOrderRowFactory is not async, which is a limitation.

The best solution would be to add a UnitPriceExcludingVat property in the AddOrUpdateCartItemArgs class, which would take precedence over the default price calculations.