Make stripe refund call optional, add request parameter to order_control_refund_render

src/pretix/control/templates/pretixcontrol/order/refund.html

@@ -13,13 +13,13 @@
             {% endblocktrans %}
         </a>
     </h1>
-    <p>{% blocktrans trimmed %}
-        Do you really want to refund this order? You cannot revert this action.
-    {% endblocktrans %}</p>
-
-    {{ payment|safe }}
-
     <form method="post" href="">
+        <p>{% blocktrans trimmed %}
+            Do you really want to refund this order? You cannot revert this action.
+        {% endblocktrans %}</p>
+
+        {{ payment|safe }}
+
         {% csrf_token %}
         <input type="hidden" name="status" value="r" />
         <div class="row checkout-button-row">

src/pretix/control/views/orders.py

@@ -240,9 +240,14 @@ class OrderTransition(OrderView):
                 'order': self.order,
             })
         elif self.order.status == Order.STATUS_PAID and to == 'r':
+            try:
+                cr = self.payment_provider.order_control_refund_render(self.order, self.request)
+            except TypeError:
+                cr = self.payment_provider.order_control_refund_render(self.order)
+
             return render(self.request, 'pretixcontrol/order/refund.html', {
                 'order': self.order,
-                'payment': self.payment_provider.order_control_refund_render(self.order),
+                'payment': cr,
             })
         else:
             return HttpResponseNotAllowed(['POST'])