Fixes

doc/user/events/giftcards.rst

@@ -0,0 +1,14 @@
+Gift cards
+==========
+
+Gift cards, also known as "gift coupons" or "gift certificates" are a mechanism that allows you to sell tokens that
+can later be used to pay for tickets.
+
+Gift cards are very different feature than **vouchers**. The difference is:
+
+* Vouchers can be used to give a discount. When a voucher is used, the price of a ticket is reduced by the configured
+  discount and sold at a lower price. They therefore reduce both revenue as well as taxes. Vouchers (in pretix) are
+  always specific to a certain product in an order. Vouchers are usually not sold but given out as part of a
+  marketing campaign or to specific groups of people.
+
+* Gift cards are not a discount. If you buy a €20 ticket with a €10 gift card, it is still a €20 ticket and

doc/user/index.rst

@@ -12,5 +12,6 @@ wanting to use pretix to sell tickets.
    events/settings
    events/structureguide
    events/widget
+   events/giftcards
    faq
-   markdown
+   markdown

src/pretix/presale/checkoutflow.py

@@ -712,7 +712,7 @@ class ConfirmStep(CartMixin, AsyncAction, TemplateFlowStep):
                        [p.id for p in self.positions], self.cart_session.get('email'),
                        translation.get_language(), self.invoice_address.pk, meta_info,
                        request.sales_channel, self.cart_session.get('gift_cards'),
-                       self.cart_session['shown_total'])
+                       self.cart_session.get('shown_total'))
 
     def get_success_message(self, value):
         create_empty_cart_id(self.request)

src/tests/presale/test_checkout.py

@@ -1379,6 +1379,7 @@ class CheckoutTestCase(BaseCheckoutTestCase, TestCase):
 
         cr1.voucher = v
         cr1.save()
+        self.client.get('/%s/%s/checkout/confirm/' % (self.orga.slug, self.event.slug), follow=True)
         response = self.client.post('/%s/%s/checkout/confirm/' % (self.orga.slug, self.event.slug), follow=True)
         doc = BeautifulSoup(response.rendered_content, "lxml")
         self.assertEqual(len(doc.select(".thank-you")), 1)