I am writing a module for  integrating a third party shipper.

Now I want before the package info is being send to the shipper to have a pop-up window where the user can check if all the fields are correct (address, name etc.). I thought of using a wizard for the purpose but the function <my_provider>_send_shipping ​requires to return a dict with some data which will be in the wizard.

basically I need within the send_shipping() to call a wizard, do the action and then give a return value back to send_shipping()

Or how can I achieve the goal?