DEVELOPER’SGUIDE1.5

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Step 4 (Shipping). At this step the delivery methods for the existing order are specified. Since this
step requires much logic, it will be described in a separate article.
Step 5 (Payment). Paying for the order via the selected method. Since this step requires much logic,
it will be described in a separate article.
If your store uses a one-page checkout design, the entire logic will be managed by the controller
OrderOpсCоntrоller . And as this is a one-page design, all requests to the controller are executed via
Ajax. The requests are processed by the method OrderOpсCоntrоller: :init( ).
Both controllers OrderCоntrоller and OrderOpсCоntrоller are inherited from the class
PаrentOrderCоntrоller which configures general checkout settings. This prevents code duplication
and leads to a more standard view. For example, PаrentOrderCоntrоller verifies which type of
design is enabled in the settings and, depending on this, redirects to the necessary checkout
controller.
So which settings can be configured for checkout? Let’s look at the main ones (the path in the admin
menu: Preferences -> Orders).
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