8 invocations of hook_order() in Ubercart 5

uc_cart_checkout_review_form_submit in uc_cart/uc_cart.module

uc_order_actions in uc_order/uc_order.module

Return the actions a user may perform on an order.

uc_order_delete in uc_order/uc_order.module

Deletes an order and tells other modules to do the same.

uc_order_get_total in uc_order/uc_order.module

Calculate up an order's total!

uc_order_load in uc_order/uc_order.module

Load an order from the database.

uc_order_new in uc_order/uc_order.module

Generate a new order for user $uid.

uc_order_save in uc_order/uc_order.module

Save an order to the database.

uc_order_update_status in uc_order/uc_order.module

Update an order's status as long as no one objects.