Stripe: Support for restricted keys

src/pretix/plugins/stripe/forms.py

@@ -2,19 +2,22 @@ from django import forms
 from django.utils.translation import ugettext_lazy as _
 
 
-class StripeKeyValidator():
+class StripeKeyValidator:
     def __init__(self, prefix):
-        assert isinstance(prefix, str)
         assert len(prefix) > 0
-        self._prefix = prefix
+        if isinstance(prefix, list):
+            self._prefixes = prefix
+        else:
+            self._prefixes = [prefix]
+            assert isinstance(prefix, str)
 
     def __call__(self, value):
-        if not value.startswith(self._prefix):
+        if not any(value.startswith(p) for p in self._prefixes):
             raise forms.ValidationError(
                 _('The provided key "%(value)s" does not look valid. It should start with "%(prefix)s".'),
-                code='invalid-stripe-secret-key',
+                code='invalid-stripe-key',
                 params={
                     'value': value,
-                    'prefix': self._prefix,
+                    'prefix': self._prefixes[0],
                 },
             )

src/pretix/plugins/stripe/payment.py

@@ -136,7 +136,7 @@ class StripeSettingsHolder(BasePaymentProvider):
                  forms.CharField(
                      label=_('Secret key'),
                      validators=(
-                         StripeKeyValidator('sk_'),
+                         StripeKeyValidator(['sk_', 'rk_']),
                      ),
                  )),
             ]

src/pretix/plugins/stripe/signals.py

@@ -106,7 +106,7 @@ def register_global_settings(sender, **kwargs):
             label=_('Stripe Connect: Secret key'),
             required=False,
             validators=(
-                StripeKeyValidator('sk_live_'),
+                StripeKeyValidator(['sk_live_', 'rk_live_']),
             ),
         )),
         ('payment_stripe_connect_publishable_key', forms.CharField(
@@ -120,7 +120,7 @@ def register_global_settings(sender, **kwargs):
             label=_('Stripe Connect: Secret key (test)'),
             required=False,
             validators=(
-                StripeKeyValidator('sk_test_'),
+                StripeKeyValidator(['sk_test_', 'rk_test_']),
             ),
         )),
         ('payment_stripe_connect_test_publishable_key', forms.CharField(