def build_submission self kwargs Return dict of data that contains eve

def build_submission(self, **kwargs):
        """
        Return a dict of data that contains everything required for an order
        submission.  This includes payment details (if any).

        This can be the right place to perform tax lookups and apply them to
        the basket.
        """
        basket = kwargs.get('basket', self.request.basket)
        shipping_address = self.get_shipping_address(basket)
        shipping_method = self.get_shipping_method(
            basket, shipping_address)
        if not shipping_method:
            total = None
        else:
            total = self.get_order_totals(
                basket, shipping_method=shipping_method)
        submission = {
            'user': self.request.user,
            'basket': basket,
            'shipping_address': shipping_address,
            'shipping_method': shipping_method,
            'order_total': total,
            'order_kwargs': {},
            'payment_kwargs': {}}

        # Allow overrides to be passed in
        submission.update(kwargs)

        # Set guest email after overrides as we need to update the order_kwargs
        # entry.
        if (not submission['user'].is_authenticated() and
                'guest_email' not in submission['order_kwargs']):
            email = self.checkout_session.get_guest_email()
            submission['order_kwargs']['guest_email'] = email



        return submission