Delivery

The delivery class must implement the msDeliveryInterface interface with 3 methods:

• getCost(msOrderInterface $order, msDelivery $delivery, $cost = 0.0) — Calculates and returns the delivery cost. Receives the order object, delivery object and current cost.
• success — Success response.
• error — Error response.

The last 2 methods are not used in the default flow.

The default delivery class msDeliveryHandler works as follows:

1. Adds weight-based cost: weight_price × total_weight of the cart
2. Checks free_delivery_amount — if the cart total reaches this value, the extra delivery cost (price) is zeroed
3. If free delivery threshold is not reached, adds the extra cost price (absolute or percentage of cart total)

Distance-based cost (distance_price) is ignored and is only for extending classes.

To use your own delivery class, see the relevant section.