Defining a PrestaShop Carrier module
We will see what a Carrier module is in the same way that we previously defined what a payment module was. What’s the difference between a Carrier module and a Carrier?
In fact, Carrier is the ObjectModel representing a shipping option for your shop. We can have 0 to N available Carriers. A Carrier will be available depending on the cart weight or price and on the delivery address location. Customer Group restrictions can also exist. A Carrier module is a module responsible for managing the availability or price of a corresponding linked Carrier; it adds capacity to it. It’s available as the upper layer of a Carrier. Be aware that a Carrier module can manage multiple Carriers.
Concretely, a Carrier module is a module extending the CarrierModule class. If you review the /classes/module/CarrierModule.php file, you will see that it is a child class of Module, defining two abstract functions:
getOrderShippingCost($params...
