API: Add webhooks for customer events

Co-authored-by: Raphael Michel <michel@rami.io>

.github/workflows/style.yml

@@ -35,7 +35,7 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-pip-
       - name: Install Dependencies
-        run: pip3 install -e ".[dev]" mysqlclient psycopg2-binary
+        run: pip3 install -e ".[dev]" psycopg2-binary
       - name: Run isort
         run: isort -c .
         working-directory: ./src
@@ -55,7 +55,7 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-pip-
       - name: Install Dependencies
-        run: pip3 install -e ".[dev]" mysqlclient psycopg2-binary
+        run: pip3 install -e ".[dev]" psycopg2-binary
       - name: Run flake8
         run: flake8 .
         working-directory: ./src

.github/workflows/tests.yml

@@ -25,27 +25,17 @@ jobs:
     strategy:
       matrix:
         python-version: ["3.9", "3.10", "3.11"]
-        database: [sqlite, postgres, mysql]
+        database: [sqlite, postgres]
         exclude:
-          - database: mysql
-            python-version: "3.9"
-          - database: mysql
-            python-version: "3.11"
           - database: sqlite
             python-version: "3.9"
           - database: sqlite
             python-version: "3.10"
     steps:
       - uses: actions/checkout@v2
-      - uses: getong/mariadb-action@v1.1
-        with:
-          mariadb version: '10.10'
-          mysql database: 'pretix'
-          mysql root password: ''
-        if: matrix.database == 'mysql'
       - uses: harmon758/postgresql-action@v1
         with:
-          postgresql version: '11'
+          postgresql version: '15'
           postgresql db: 'pretix'
           postgresql user: 'postgres'
           postgresql password: 'postgres'
@@ -61,9 +51,9 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-pip-
       - name: Install system dependencies
-        run: sudo apt update && sudo apt install gettext mariadb-client
+        run: sudo apt update && sudo apt install gettext
       - name: Install Python dependencies
-        run: pip3 install --ignore-requires-python -e ".[dev]" mysqlclient psycopg2-binary  # We ignore that flake8 needs newer python as we don't run flake8 during tests
+        run: pip3 install --ignore-requires-python -e ".[dev]" psycopg2-binary  # We ignore that flake8 needs newer python as we don't run flake8 during tests
       - name: Run checks
         run: python manage.py check
         working-directory: ./src

Dockerfile

@@ -3,7 +3,6 @@ FROM python:3.11-bullseye
 RUN apt-get update && \
     apt-get install -y --no-install-recommends \
             build-essential \
-            libmariadb-dev \
             gettext \
             git \
             libffi-dev \
@@ -34,8 +33,7 @@ RUN apt-get update && \
     mkdir /static && \
     mkdir /etc/supervisord && \
 	curl -fsSL https://deb.nodesource.com/setup_16.x | sudo -E bash - && \
-    apt-get install -y nodejs && \
+    apt-get install -y nodejs
-    curl -qL https://www.npmjs.com/install.sh | sh
 
 
 ENV LC_ALL=C.UTF-8 \
@@ -58,7 +56,7 @@ RUN pip3 install -U \
         wheel && \
     cd /pretix && \
     PRETIX_DOCKER_BUILD=TRUE pip3 install \
-        -e ".[memcached,mysql]" \
+        -e ".[memcached]" \
         gunicorn django-extensions ipython && \
     rm -rf ~/.cache/pip
 

deployment/docker/production_settings.py

@@ -1,4 +1,4 @@
 from pretix.settings import *
 
 LOGGING['handlers']['mail_admins']['include_html'] = True
-STATICFILES_STORAGE = 'django.contrib.staticfiles.storage.ManifestStaticFilesStorage'
+STORAGES["staticfiles"]["BACKEND"] = 'django.contrib.staticfiles.storage.ManifestStaticFilesStorage'

doc/admin/config.rst

@@ -152,25 +152,26 @@ Example::
     password=abcd
     host=localhost
     port=3306
+    sslmode=require
+    sslrootcert=/etc/pretix/postgresql-ca.crt
+    sslcert=/etc/pretix/postgresql-client-crt.crt
+    sslkey=/etc/pretix/postgresql-client-key.key
 
 ``backend``
-    One of ``mysql`` (deprecated), ``sqlite3`` and ``postgresql``.
+    One of ``sqlite3`` and ``postgresql``.
     Default: ``sqlite3``.
 
-    If you use MySQL, be sure to create your database using
-    ``CREATE DATABASE <dbname> CHARACTER SET utf8;``. Otherwise, Unicode
-    support will not properly work.
-
 ``name``
     The database's name. Default: ``db.sqlite3``.
 
 ``user``, ``password``, ``host``, ``port``
     Connection details for the database connection. Empty by default.
 
-``galera``
+``sslmode``, ``sslrootcert``
-    (Deprecated) Indicates if the database backend is a MySQL/MariaDB Galera cluster and
+    Connection TLS details for the PostgreSQL database connection. Possible values of ``sslmode`` are ``disable``, ``allow``, ``prefer``, ``require``, ``verify-ca``, and ``verify-full``. ``sslrootcert`` should be the accessible path of the ca certificate. Both values are empty by default.
-    turns on some optimizations/special case handlers. Default: ``False``
 
+``sslcert``, ``sslkey``
+    Connection mTLS details for the PostgreSQL database connection. It's also necessary to specify ``sslmode`` and ``sslrootcert`` parameters, please check the correct values from the TLS part. ``sslcert`` should be the accessible path of the client certificate.  ``sslkey`` should be the accessible path of the client key. All values are empty by default.
 .. _`config-replica`:
 
 Database replica settings
@@ -332,6 +333,10 @@ to speed up various operations::
             ["sentinel_host_3", 26379]
         ]
     password=password
+    ssl_cert_reqs=required
+    ssl_ca_certs=/etc/pretix/redis-ca.pem
+    ssl_keyfile=/etc/pretix/redis-client-crt.pem
+    ssl_certfile=/etc/pretix/redis-client-key.key
 
 ``location``
     The location of redis, as a URL of the form ``redis://[:password]@localhost:6379/0``
@@ -355,6 +360,22 @@ to speed up various operations::
     If your redis setup doesn't require a password or you already specified it in the location you can omit this option.
     If this is set it will be passed to redis as the connection option PASSWORD.
 
+``ssl_cert_reqs``
+    If this is set it will be passed to redis as the connection option ``SSL_CERT_REQS``.
+    Possible values are ``none``, ``optional``, and ``required``.
+
+``ssl_ca_certs``
+    If your redis setup doesn't require TLS you can omit this option.
+    If this is set it will be passed to redis as the connection option ``SSL_CA_CERTS``. Possible value is the ca path.
+
+``ssl_keyfile``
+    If your redis setup doesn't require mTLS you can omit this option.
+    If this is set it will be passed to redis as the connection option ``SSL_KEYFILE``. Possible value is the keyfile path.
+
+``ssl_certfile``
+    If your redis setup doesn't require mTLS you can omit this option.
+    If this is set it will be passed to redis as the connection option ``SSL_CERTFILE``. Possible value is the certfile path.
+
 If redis is not configured, pretix will store sessions and locks in the database. If memcached
 is configured, memcached will be used for caching instead of redis.
 
@@ -404,6 +425,8 @@ The two ``transport_options`` entries can be omitted in most cases.
 If they are present they need to be a valid JSON dictionary.
 For possible entries in that dictionary see the `Celery documentation`_.
 
+It is possible the use Redis with TLS/mTLS for the broker or the backend. To do so, it is necessary to specify the TLS identifier ``rediss``, the ssl mode ``ssl_cert_reqs`` and optionally specify the CA (TLS) ``ssl_ca_certs``, cert ``ssl_certfile`` and key ``ssl_keyfile`` (mTLS) path as encoded string. the following uri describes the format and possible parameters ``rediss://0.0.0.0:6379/1?ssl_cert_reqs=required&ssl_ca_certs=%2Fetc%2Fpretix%2Fredis-ca.pem&ssl_certfile=%2Fetc%2Fpretix%2Fredis-client-crt.pem&ssl_keyfile=%2Fetc%2Fpretix%2Fredis-client-key.key``
+
 To use redis with sentinels set the broker or backend to ``sentinel://sentinel_host_1:26379;sentinel_host_2:26379/0``
 and the respective transport_options to ``{"master_name":"mymaster"}``.
 If your redis instances behind the sentinel have a password use ``sentinel://:my_password@sentinel_host_1:26379;sentinel_host_2:26379/0``.

doc/admin/installation/docker_smallscale.rst

@@ -26,7 +26,7 @@ installation guides):
 * `Docker`_
 * A SMTP server to send out mails, e.g. `Postfix`_ on your machine or some third-party server you have credentials for
 * A HTTP reverse proxy, e.g. `nginx`_ or Apache to allow HTTPS connections
-* A `PostgreSQL`_ 9.6+ database server
+* A `PostgreSQL`_ 11+ database server
 * A `redis`_ server
 
 We also recommend that you use a firewall, although this is not a pretix-specific recommendation. If you're new to
@@ -321,11 +321,11 @@ workers, e.g. ``docker run … taskworker -Q notifications --concurrency 32``.
 
 
 .. _Docker: https://docs.docker.com/engine/installation/linux/debian/
-.. _Postfix: https://www.digitalocean.com/community/tutorials/how-to-install-and-configure-postfix-as-a-send-only-smtp-server-on-ubuntu-16-04
+.. _Postfix: https://www.digitalocean.com/community/tutorials/how-to-install-and-configure-postfix-as-a-send-only-smtp-server-on-ubuntu-22-04
 .. _nginx: https://botleg.com/stories/https-with-lets-encrypt-and-nginx/
 .. _Let's Encrypt: https://letsencrypt.org/
 .. _pretix.eu: https://pretix.eu/
-.. _PostgreSQL: https://www.digitalocean.com/community/tutorials/how-to-install-and-use-postgresql-on-ubuntu-20-04
+.. _PostgreSQL: https://www.digitalocean.com/community/tutorials/how-to-install-and-use-postgresql-on-ubuntu-22-04
 .. _redis: https://blog.programster.org/debian-8-install-redis-server/
 .. _ufw: https://en.wikipedia.org/wiki/Uncomplicated_Firewall
 .. _redis website: https://redis.io/topics/security

doc/admin/installation/enterprise.rst

@@ -68,7 +68,7 @@ generated key and installs the plugin from the URL we told you::
         mkdir -p /etc/ssh && \
         ssh-keyscan -t rsa -p 10022 code.rami.io >> /root/.ssh/known_hosts && \
         echo StrictHostKeyChecking=no >> /root/.ssh/config && \
-        DJANGO_SETTINGS_MODULE=pretix.settings pip3 install -U "git+ssh://git@code.rami.io:10022/pretix/pretix-slack.git@stable#egg=pretix-slack" && \
+        DJANGO_SETTINGS_MODULE= pip3 install -U "git+ssh://git@code.rami.io:10022/pretix/pretix-slack.git@stable#egg=pretix-slack" && \
         cd /pretix/src && \
         sudo -u pretixuser make production
     USER pretixuser

doc/admin/installation/general.rst

@@ -16,14 +16,11 @@ To use pretix, you will need the following things:
 * A periodic task runner, e.g. ``cron``
 
 * **A database**. This needs to be a SQL-based that is supported by Django. We highly recommend to either
-  go for **PostgreSQL** or **MySQL/MariaDB**. If you do not provide one, pretix will run on SQLite, which is useful
+  go for **PostgreSQL**. If you do not provide one, pretix will run on SQLite, which is useful
   for evaluation and development purposes.
 
   .. warning:: Do not ever use SQLite in production. It will break.
 
-  .. warning:: We recommend **PostgreSQL**. If you go for MySQL, make sure you run **MySQL 5.7 or newer** or
-               **MariaDB 10.2.7 or newer**.
-
 * A **reverse proxy**. pretix needs to deliver some static content to your users (e.g. CSS, images, ...). While pretix
   is capable of doing this, having this handled by a proper web server like **nginx** or **Apache** will be much
   faster. Also, you need a proxying web server in front to provide SSL encryption.

doc/admin/installation/manual_smallscale.rst

@@ -21,6 +21,7 @@ Requirements
 Please set up the following systems beforehand, we'll not explain them here in detail (but see these links for external
 installation guides):
 
+* A python 3.9+ installation
 * A SMTP server to send out mails, e.g. `Postfix`_ on your machine or some third-party server you have credentials for
 * A HTTP reverse proxy, e.g. `nginx`_ or Apache to allow HTTPS connections
 * A `PostgreSQL`_ 11+ database server
@@ -323,11 +324,11 @@ Then, proceed like after any plugin installation::
     (venv)$ python -m pretix updatestyles
     # systemctl restart pretix-web pretix-worker
 
-.. _Postfix: https://www.digitalocean.com/community/tutorials/how-to-install-and-configure-postfix-as-a-send-only-smtp-server-on-ubuntu-16-04
+.. _Postfix: https://www.digitalocean.com/community/tutorials/how-to-install-and-configure-postfix-as-a-send-only-smtp-server-on-ubuntu-22-04
 .. _nginx: https://botleg.com/stories/https-with-lets-encrypt-and-nginx/
 .. _Let's Encrypt: https://letsencrypt.org/
 .. _pretix.eu: https://pretix.eu/
-.. _PostgreSQL: https://www.digitalocean.com/community/tutorials/how-to-install-and-use-postgresql-on-ubuntu-20-04
+.. _PostgreSQL: https://www.digitalocean.com/community/tutorials/how-to-install-and-use-postgresql-on-ubuntu-22-04
 .. _redis: https://blog.programster.org/debian-8-install-redis-server/
 .. _ufw: https://en.wikipedia.org/wiki/Uncomplicated_Firewall
 .. _strong encryption settings: https://mozilla.github.io/server-side-tls/ssl-config-generator/

doc/admin/mysql2postgres.rst

@@ -3,11 +3,11 @@
 Migrating from MySQL/MariaDB to PostgreSQL
 ==========================================
 
-Our recommended database for all production installations is PostgreSQL. Support for MySQL/MariaDB will be removed in
+Our recommended database for all production installations is PostgreSQL. Support for MySQL/MariaDB has been removed
-pretix 5.0.
+in newer pretix releases.
 
 In order to follow this guide, your pretix installation needs to be a version that fully supports MySQL/MariaDB. If you
-already upgraded to pretix 5.0, downgrade back to the last 4.x release using ``pip``.
+already upgraded to pretix 5.0 or later, downgrade back to the last 4.x release using ``pip``.
 
 .. note:: We have tested this guide carefully, but we can't assume any liability for its correctness. The data loss
           risk should be low as long as pretix is not running while you do the migration. If you are a pretix Enterprise

doc/api/deviceauth.rst

@@ -32,10 +32,16 @@ as well as the type of underlying hardware. Example:
        "token": "kpp4jn8g2ynzonp6",
        "hardware_brand": "Samsung",
        "hardware_model": "Galaxy S",
+       "os_name": "Android",
+       "os_version": "2.3.6",
        "software_brand": "pretixdroid",
-       "software_version": "4.0.0"
+       "software_version": "4.0.0",
+       "rsa_pubkey": "-----BEGIN PUBLIC KEY-----\nMIIBIjANBgkqh…nswIDAQAB\n-----END PUBLIC KEY-----\n"
    }
 
+The ``rsa_pubkey`` is optional any only required for certain fatures such as working with reusable
+media and NFC cryptography.
+
 Every initialization token can only be used once. On success, you will receive a response containing
 information on your device as well as your API token:
 
@@ -98,6 +104,8 @@ following endpoint:
    {
        "hardware_brand": "Samsung",
        "hardware_model": "Galaxy S",
+       "os_name": "Android",
+       "os_version": "2.3.6",
        "software_brand": "pretixdroid",
        "software_version": "4.1.0",
        "info": {"arbitrary": "data"}
@@ -133,9 +141,29 @@ The response will look like this:
          "id": 3,
          "name": "South entrance"
        }
-     }
+     },
+     "server": {
+       "version": {
+         "pretix": "3.6.0.dev0",
+         "pretix_numeric": 30060001000
+       }
+     },
+     "medium_key_sets": [
+       {
+         "public_id": 3456349,
+         "organizer": "foo",
+         "active": true,
+         "media_type": "nfc_mf0aes",
+         "uid_key": "base64-encoded-encrypted-key",
+         "diversification_key": "base64-encoded-encrypted-key",
+       }
+     ]
    }
 
+``"medium_key_sets`` will always be empty if you did not set an ``rsa_pubkey``.
+The individual keys in the key sets are encrypted with the device's ``rsa_pubkey``
+using ``RSA/ECB/PKCS1Padding``.
+
 Creating a new API key
 ----------------------
 

doc/api/resources/devices.rst

@@ -24,6 +24,8 @@ all_events                            boolean                    Whether this de
 limit_events                          list                       List of event slugs this device has access to
 hardware_brand                        string                     Device hardware manufacturer (read-only)
 hardware_model                        string                     Device hardware model (read-only)
+os_name                               string                     Device operating system name (read-only)
+os_version                            string                     Device operating system version (read-only)
 software_brand                        string                     Device software product (read-only)
 software_version                      string                     Device software version (read-only)
 created                               datetime                   Creation time
@@ -76,6 +78,8 @@ Device endpoints
             "security_profile": "full",
             "hardware_brand": "Zebra",
             "hardware_model": "TC25",
+            "os_name": "Android",
+            "os_version": "8.1.0",
             "software_brand": "pretixSCAN",
             "software_version": "1.5.1"
           }
@@ -123,6 +127,8 @@ Device endpoints
         "security_profile": "full",
         "hardware_brand": "Zebra",
         "hardware_model": "TC25",
+        "os_name": "Android",
+        "os_version": "8.1.0",
         "software_brand": "pretixSCAN",
         "software_version": "1.5.1"
       }
@@ -173,6 +179,8 @@ Device endpoints
         "initialized": null
         "hardware_brand": null,
         "hardware_model": null,
+        "os_name": null,
+        "os_version": null,
         "software_brand": null,
         "software_version": null
       }

doc/api/resources/discounts.rst

@@ -31,9 +31,9 @@ subevent_mode                            strings                    Determines h
                                                                     ``"same"`` (discount is only applied for groups within
                                                                     the same date), or ``"distinct"`` (discount is only applied
                                                                     for groups with no two same dates).
-condition_all_products                   boolean                    If ``true``, the discount applies to all items.
+condition_all_products                   boolean                    If ``true``, the discount condition applies to all items.
 condition_limit_products                 list of integers           If ``condition_all_products`` is not set, this is a list
-                                                                    of internal item IDs that the discount applies to.
+                                                                    of internal item IDs that the discount condition applies to.
 condition_apply_to_addons                boolean                    If ``true``, the discount applies to add-on products as well,
                                                                     otherwise it only applies to top-level items. The discount never
                                                                     applies to bundled products.
@@ -48,6 +48,17 @@ benefit_discount_matching_percent        decimal (string)           The percenta
 benefit_only_apply_to_cheapest_n_matches integer                    If set higher than 0, the discount will only be applied to
                                                                     the cheapest matches. Useful for a "3 for 2"-style discount.
                                                                     Cannot be combined with ``condition_min_value``.
+benefit_same_products                    boolean                    If ``true``, the discount benefit applies to the same set of items
+                                                                    as the condition (see above).
+benefit_limit_products                   list of integers           If ``benefit_same_products`` is not set, this is a list
+                                                                    of internal item IDs that the discount benefit applies to.
+benefit_apply_to_addons                  boolean                    (Only used if ``benefit_same_products`` is ``false``.)
+                                                                    If ``true``, the discount applies to add-on products as well,
+                                                                    otherwise it only applies to top-level items. The discount never
+                                                                    applies to bundled products.
+benefit_ignore_voucher_discounted        boolean                    (Only used if ``benefit_same_products`` is ``false``.)
+                                                                    If ``true``, the discount does not apply to products which have
+                                                                    been discounted by a voucher.
 ======================================== ========================== =======================================================
 
 
@@ -94,6 +105,10 @@ Endpoints
             "condition_ignore_voucher_discounted": false,
             "condition_min_count": 3,
             "condition_min_value": "0.00",
+            "benefit_same_products": true,
+            "benefit_limit_products": [],
+            "benefit_apply_to_addons": true,
+            "benefit_ignore_voucher_discounted": false,
             "benefit_discount_matching_percent": "100.00",
             "benefit_only_apply_to_cheapest_n_matches": 1
           }
@@ -146,6 +161,10 @@ Endpoints
         "condition_ignore_voucher_discounted": false,
         "condition_min_count": 3,
         "condition_min_value": "0.00",
+        "benefit_same_products": true,
+        "benefit_limit_products": [],
+        "benefit_apply_to_addons": true,
+        "benefit_ignore_voucher_discounted": false,
         "benefit_discount_matching_percent": "100.00",
         "benefit_only_apply_to_cheapest_n_matches": 1
       }
@@ -184,6 +203,10 @@ Endpoints
         "condition_ignore_voucher_discounted": false,
         "condition_min_count": 3,
         "condition_min_value": "0.00",
+        "benefit_same_products": true,
+        "benefit_limit_products": [],
+        "benefit_apply_to_addons": true,
+        "benefit_ignore_voucher_discounted": false,
         "benefit_discount_matching_percent": "100.00",
         "benefit_only_apply_to_cheapest_n_matches": 1
       }
@@ -211,6 +234,10 @@ Endpoints
         "condition_ignore_voucher_discounted": false,
         "condition_min_count": 3,
         "condition_min_value": "0.00",
+        "benefit_same_products": true,
+        "benefit_limit_products": [],
+        "benefit_apply_to_addons": true,
+        "benefit_ignore_voucher_discounted": false,
         "benefit_discount_matching_percent": "100.00",
         "benefit_only_apply_to_cheapest_n_matches": 1
       }
@@ -267,6 +294,10 @@ Endpoints
         "condition_ignore_voucher_discounted": false,
         "condition_min_count": 3,
         "condition_min_value": "0.00",
+        "benefit_same_products": true,
+        "benefit_limit_products": [],
+        "benefit_apply_to_addons": true,
+        "benefit_ignore_voucher_discounted": false,
         "benefit_discount_matching_percent": "100.00",
         "benefit_only_apply_to_cheapest_n_matches": 1
       }

doc/api/resources/events.rst

@@ -70,6 +70,11 @@ Endpoints
 
     The ``public_url`` field has been added.
 
+.. versionchanged:: 5.0
+
+    The ``date_from_before``, ``date_from_after``, ``date_to_before``, and ``date_to_after`` query parameters have been
+    added.
+
 .. http:get:: /api/v1/organizers/(organizer)/events/
 
    Returns a list of all events within a given organizer the authenticated user/token has access to.
@@ -141,6 +146,10 @@ Endpoints
    :query has_subevents: If set to ``true``/``false``, only events with a matching value of ``has_subevents`` are returned.
    :query is_future: If set to ``true`` (``false``), only events that happen currently or in the future are (not) returned. Event series are never (always) returned.
    :query is_past: If set to ``true`` (``false``), only events that are over are (not) returned. Event series are never (always) returned.
+   :query date_from_after: If set to a date and time, only events that start at or after the given time are returned.
+   :query date_from_before: If set to a date and time, only events that start at or before the given time are returned.
+   :query date_to_after: If set to a date and time, only events that have an end date and end at or after the given time are returned.
+   :query date_to_before: If set to a date and time, only events that have an end date and end at or before the given time are returned.
    :query ends_after: If set to a date and time, only events that happen during of after the given time are returned. Event series are never returned.
    :query string ordering: Manually set the ordering of results. Valid fields to be used are ``date_from`` and
                            ``slug``. Keep in mind that ``date_from`` of event series does not really tell you anything.

doc/api/resources/exporters.rst

@@ -111,7 +111,7 @@ Listing available exporters
             "input_parameters": [
               {
                 "name": "events",
-                "required": true
+                "required": false
               },
               {
                 "name": "_format",

doc/api/resources/invoices.rst

@@ -12,6 +12,7 @@ The invoice resource contains the following public fields:
 Field                                 Type                       Description
 ===================================== ========================== =======================================================
 number                                string                     Invoice number (with prefix)
+event                                 string                     The slug of the parent event
 order                                 string                     Order code of the order this invoice belongs to
 is_cancellation                       boolean                    ``true``, if this invoice is the cancellation of a
                                                                  different invoice.
@@ -121,9 +122,13 @@ internal_reference                    string                     Customer's refe
 
    The attribute ``lines.subevent`` has been added.
 
+.. versionchanged:: 2023.8
 
-Endpoints
+   The ``event`` attribute has been added. The organizer-level endpoint has been added.
----------
+
+
+List of all invoices
+--------------------
 
 .. http:get:: /api/v1/organizers/(organizer)/events/(event)/invoices/
 
@@ -152,6 +157,7 @@ Endpoints
         "results": [
           {
             "number": "SAMPLECONF-00001",
+            "event": "sampleconf",
             "order": "ABC12",
             "is_cancellation": false,
             "invoice_from_name": "Big Events LLC",
@@ -221,6 +227,50 @@ Endpoints
    :statuscode 401: Authentication failure
    :statuscode 403: The requested organizer/event does not exist **or** you have no permission to view this resource.
 
+.. http:get:: /api/v1/organizers/(organizer)/invoices/
+
+   Returns a list of all invoices within all events of a given organizer (with sufficient access permissions).
+
+   Supported query parameters and output format of this endpoint are identical to the list endpoint within an event.
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+      GET /api/v1/organizers/bigevents/events/sampleconf/invoices/ HTTP/1.1
+      Host: pretix.eu
+      Accept: application/json, text/javascript
+
+   **Example response**:
+
+   .. sourcecode:: http
+
+      HTTP/1.1 200 OK
+      Vary: Accept
+      Content-Type: application/json
+
+      {
+        "count": 1,
+        "next": null,
+        "previous": null,
+        "results": [
+          {
+            "number": "SAMPLECONF-00001",
+            "event": "sampleconf",
+            "order": "ABC12",
+            ...
+        ]
+      }
+
+   :param organizer: The ``slug`` field of the organizer to fetch
+   :statuscode 200: no error
+   :statuscode 401: Authentication failure
+   :statuscode 403: The requested organizer/event does not exist **or** you have no permission to view this resource.
+
+
+Fetching individual invoices
+----------------------------
+
 .. http:get:: /api/v1/organizers/(organizer)/events/(event)/invoices/(number)/
 
    Returns information on one invoice, identified by its invoice number.
@@ -243,6 +293,7 @@ Endpoints
 
       {
         "number": "SAMPLECONF-00001",
+        "event": "sampleconf",
         "order": "ABC12",
         "is_cancellation": false,
         "invoice_from_name": "Big Events LLC",
@@ -337,6 +388,12 @@ Endpoints
    :statuscode 409: The file is not yet ready and will now be prepared. Retry the request after waiting for a few
                     seconds.
 
+
+Modifying invoices
+------------------
+
+Invoices cannot be edited directly, but the following actions can be triggered:
+
 .. http:post:: /api/v1/organizers/(organizer)/events/(event)/invoices/(invoice_no)/reissue/
 
    Cancels the invoice and creates a new one.

doc/api/resources/orders.rst

@@ -20,6 +20,7 @@ The order resource contains the following public fields:
 Field                                 Type                       Description
 ===================================== ========================== =======================================================
 code                                  string                     Order code
+event                                 string                     The slug of the parent event
 status                                string                     Order status, one of:
 
                                                                  * ``n`` – pending
@@ -130,6 +131,10 @@ last_modified                         datetime                   Last modificati
 
    The ``valid_if_pending`` attribute has been added.
 
+.. versionchanged:: 2023.8
+
+   The ``event`` attribute has been added. The organizer-level endpoint has been added.
+
 
 .. _order-position-resource:
 
@@ -289,6 +294,7 @@ List of all orders
         "results": [
           {
             "code": "ABC12",
+            "event": "sampleconf",
             "status": "p",
             "testmode": false,
             "secret": "k24fiuwvu8kxz3y1",
@@ -441,6 +447,48 @@ List of all orders
    :statuscode 401: Authentication failure
    :statuscode 403: The requested organizer/event does not exist **or** you have no permission to view this resource.
 
+.. http:get:: /api/v1/organizers/(organizer)/orders/
+
+   Returns a list of all orders within all events of a given organizer (with sufficient access permissions).
+
+   Supported query parameters and output format of this endpoint are identical to the list endpoint within an event,
+   with the exception that the ``pdf_data`` parameter is not supported here.
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+      GET /api/v1/organizers/bigevents/orders/ HTTP/1.1
+      Host: pretix.eu
+      Accept: application/json, text/javascript
+
+   **Example response**:
+
+   .. sourcecode:: http
+
+      HTTP/1.1 200 OK
+      Vary: Accept
+      Content-Type: application/json
+      X-Page-Generated: 2017-12-01T10:00:00Z
+
+      {
+        "count": 1,
+        "next": null,
+        "previous": null,
+        "results": [
+          {
+            "code": "ABC12",
+            "event": "sampleconf",
+            ...
+          }
+        ]
+      }
+
+   :param organizer: The ``slug`` field of the organizer to fetch
+   :statuscode 200: no error
+   :statuscode 401: Authentication failure
+   :statuscode 403: The requested organizer/event does not exist **or** you have no permission to view this resource.
+
 Fetching individual orders
 --------------------------
 
@@ -466,6 +514,7 @@ Fetching individual orders
 
       {
         "code": "ABC12",
+        "event": "sampleconf",
         "status": "p",
         "testmode": false,
         "secret": "k24fiuwvu8kxz3y1",

doc/api/resources/reusablemedia.rst

@@ -18,7 +18,8 @@ The reusable medium resource contains the following public fields:
 Field                                 Type                       Description
 ===================================== ========================== =======================================================
 id                                    integer                    Internal ID of the medium
-type                                  string                     Type of medium, e.g. ``"barcode"`` or ``"nfc_uid"``.
+type                                  string                     Type of medium, e.g. ``"barcode"``, ``"nfc_uid"`` or ``"nfc_mf0aes"``.
+organizer                             string                     Organizer slug of the organizer who "owns" this medium.
 identifier                            string                     Unique identifier of the medium. The format depends on the ``type``.
 active                                boolean                    Whether this medium may be used.
 created                               datetime                   Date of creation
@@ -36,6 +37,7 @@ Existing media types are:
 
 - ``barcode``
 - ``nfc_uid``
+- ``nfc_mf0aes``
 
 Endpoints
 ---------
@@ -67,6 +69,7 @@ Endpoints
         "results": [
           {
             "id": 1,
+            "organizer": "bigevents",
             "identifier": "ABCDEFGH",
             "created": "2021-04-06T13:44:22.809377Z",
             "updated": "2021-04-06T13:44:22.809377Z",
@@ -123,6 +126,7 @@ Endpoints
 
       {
         "id": 1,
+        "organizer": "bigevents",
         "identifier": "ABCDEFGH",
         "created": "2021-04-06T13:44:22.809377Z",
         "updated": "2021-04-06T13:44:22.809377Z",
@@ -152,6 +156,9 @@ Endpoints
    Look up a new reusable medium by its identifier. In some cases, this might lead to the automatic creation of a new
    medium behind the scenes.
 
+   This endpoint, and this endpoint only, might return media from a different organizer if there is a cross-acceptance
+   agreement. In this case, only linked gift cards will be returned, no order position or customer records,
+
    **Example request**:
 
    .. sourcecode:: http
@@ -176,6 +183,7 @@ Endpoints
 
       {
         "id": 1,
+        "organizer": "bigevents",
         "identifier": "ABCDEFGH",
         "created": "2021-04-06T13:44:22.809377Z",
         "updated": "2021-04-06T13:44:22.809377Z",
@@ -235,6 +243,7 @@ Endpoints
 
       {
         "id": 1,
+        "organizer": "bigevents",
         "identifier": "ABCDEFGH",
         "created": "2021-04-06T13:44:22.809377Z",
         "updated": "2021-04-06T13:44:22.809377Z",
@@ -291,6 +300,7 @@ Endpoints
 
       {
         "id": 1,
+        "organizer": "bigevents",
         "identifier": "ABCDEFGH",
         "created": "2021-04-06T13:44:22.809377Z",
         "updated": "2021-04-06T13:44:22.809377Z",

doc/api/resources/sendmail_rules.rst

@@ -18,8 +18,19 @@ subject                               multi-lingual string       The subject of
 template                              multi-lingual string       The body of the email
 all_products                          boolean                    If ``true``, the email is sent to buyers of all products
 limit_products                        list of integers           List of product IDs, if ``all_products`` is not set
-include_pending                       boolean                    If ``true``, the email is sent to pending orders. If ``false``,
+[**DEPRECATED**] include_pending      boolean                    If ``true``, the email is sent to pending orders. If ``false``,
                                                                  only paid orders are considered.
+restrict_to_status                    list                       List of order states to restrict recipients to. Valid
+                                                                 entries are ``p`` for paid, ``e`` for expired, ``c`` for canceled,
+                                                                 ``n__pending_approval`` for pending approval,
+                                                                 ``n__not_pending_approval_and_not_valid_if_pending`` for payment
+                                                                 pending, ``n__valid_if_pending`` for payment pending but already confirmed,
+                                                                 and ``n__pending_overdue`` for pending with payment overdue.
+                                                                 The default is ``["p", "n__valid_if_pending"]``.
+checked_in_status                     string                     Check-in status to restrict recipients to. Valid strings are:
+                                                                 ``null`` for no filtering (default), ``checked_in`` for
+                                                                 limiting to attendees that are or have been checked in, and
+                                                                 ``no_checkin`` for limiting to attendees who have not checked in.
 date_is_absolute                      boolean                    If ``true``, the email is set at a specific point in time.
 send_date                             datetime                   If ``date_is_absolute`` is set: Date and time to send the email.
 send_offset_days                      integer                    If ``date_is_absolute`` is not set, this is the number of days
@@ -37,7 +48,10 @@ send_to                               string                     Can be ``"order
                                                                  or ``"both"``.
                                                                  date. Otherwise it is relative to the event start date.
 ===================================== ========================== =======================================================
+.. versionchanged:: 2023.7
 
+    The ``include_pending`` field has been  deprecated.
+    The ``restrict_to_status`` field has been added.
 
 Endpoints
 ---------
@@ -74,7 +88,12 @@ Endpoints
             "template": {"en": "Don't forget your tickets, download them at {url}"},
             "all_products": true,
             "limit_products": [],
-            "include_pending": false,
+            "restrict_to_status": [
+                "p",
+                "n__not_pending_approval_and_not_valid_if_pending",
+                "n__valid_if_pending"
+            ],
+            "checked_in_status": null,
             "send_date": null,
             "send_offset_days": 1,
             "send_offset_time": "18:00",
@@ -120,7 +139,12 @@ Endpoints
         "template": {"en": "Don't forget your tickets, download them at {url}"},
         "all_products": true,
         "limit_products": [],
-        "include_pending": false,
+        "restrict_to_status": [
+            "p",
+            "n__not_pending_approval_and_not_valid_if_pending",
+            "n__valid_if_pending"
+        ],
+        "checked_in_status": null,
         "send_date": null,
         "send_offset_days": 1,
         "send_offset_time": "18:00",
@@ -157,7 +181,12 @@ Endpoints
         "template": {"en": "Don't forget your tickets, download them at {url}"},
         "all_products": true,
         "limit_products": [],
-        "include_pending": false,
+        "restrict_to_status": [
+            "p",
+            "n__not_pending_approval_and_not_valid_if_pending",
+            "n__valid_if_pending"
+        ],
+        "checked_in_status": "checked_in",
         "send_date": null,
         "send_offset_days": 1,
         "send_offset_time": "18:00",
@@ -182,7 +211,12 @@ Endpoints
         "template": {"en": "Don't forget your tickets, download them at {url}"},
         "all_products": true,
         "limit_products": [],
-        "include_pending": false,
+        "restrict_to_status": [
+            "p",
+            "n__not_pending_approval_and_not_valid_if_pending",
+            "n__valid_if_pending"
+        ],
+        "checked_in_status": "checked_in",
         "send_date": null,
         "send_offset_days": 1,
         "send_offset_time": "18:00",
@@ -235,7 +269,12 @@ Endpoints
         "template": {"en": "Don't forget your tickets, download them at {url}"},
         "all_products": true,
         "limit_products": [],
-        "include_pending": false,
+        "restrict_to_status": [
+            "p",
+            "n__not_pending_approval_and_not_valid_if_pending",
+            "n__valid_if_pending"
+        ],
+        "checked_in_status": "checked_in",
         "send_date": null,
         "send_offset_days": 1,
         "send_offset_time": "18:00",

doc/api/resources/subevents.rst

@@ -63,6 +63,11 @@ last_modified                         datetime                   Last modificati
 
     The ``search`` query parameter has been added to filter sub-events by their name or location in any language.
 
+.. versionchanged:: 5.0
+
+    The ``date_from_before``, ``date_from_after``, ``date_to_before``, and ``date_to_after`` query parameters have been
+    added.
+
 Endpoints
 ---------
 
@@ -130,6 +135,10 @@ Endpoints
    :query active: If set to ``true``/``false``, only events with a matching value of ``active`` are returned.
    :query is_future: If set to ``true`` (``false``), only events that happen currently or in the future are (not) returned.
    :query is_past: If set to ``true`` (``false``), only events that are over are (not) returned.
+   :query date_from_after: If set to a date and time, only events that start at or after the given time are returned.
+   :query date_from_before: If set to a date and time, only events that start at or before the given time are returned.
+   :query date_to_after: If set to a date and time, only events that have an end date and end at or after the given time are returned.
+   :query date_to_before: If set to a date and time, only events that have an end date and end at or before the given time are returned.
    :query ends_after: If set to a date and time, only events that happen during of after the given time are returned.
    :query search: Only return events matching a given search query.
    :param organizer: The ``slug`` field of a valid organizer
@@ -458,6 +467,10 @@ Endpoints
    :query event__live: If set to ``true``/``false``, only events with a matching value of ``live`` on the parent event are returned.
    :query is_future: If set to ``true`` (``false``), only events that happen currently or in the future are (not) returned.
    :query is_past: If set to ``true`` (``false``), only events that are over are (not) returned.
+   :query date_from_after: If set to a date and time, only events that start at or after the given time are returned.
+   :query date_from_before: If set to a date and time, only events that start at or before the given time are returned.
+   :query date_to_after: If set to a date and time, only events that have an end date and end at or after the given time are returned.
+   :query date_to_before: If set to a date and time, only events that have an end date and end at or before the given time are returned.
    :query ends_after: If set to a date and time, only events that happen during of after the given time are returned.
    :query sales_channel: If set to a sales channel identifier, the response will only contain subevents from events available on this sales channel.
    :param organizer: The ``slug`` field of a valid organizer

doc/api/resources/taxrules.rst

@@ -20,11 +20,16 @@ internal_name                         string                     An optional nam
 rate                                  decimal (string)           Tax rate in percent
 price_includes_tax                    boolean                    If ``true`` (default), tax is assumed to be included in
                                                                  the specified product price
-eu_reverse_charge                     boolean                    If ``true``, EU reverse charge rules are applied
+eu_reverse_charge                     boolean                    If ``true``, EU reverse charge rules are applied. Will
+                                                                 be ignored if custom rules are set.
 home_country                          string                     Merchant country (required for reverse charge), can be
                                                                  ``null`` or empty string
 keep_gross_if_rate_changes            boolean                    If ``true``, changes of the tax rate based on custom
                                                                  rules keep the gross price constant (default is ``false``)
+custom_rules                          object                     Dynamic rules specification. Each list element
+                                                                 corresponds to one rule that will be processed in order.
+                                                                 The current version of the schema in use can be found
+                                                                 `here`_.
 ===================================== ========================== =======================================================
 
 
@@ -32,6 +37,10 @@ keep_gross_if_rate_changes            boolean                    If ``true``, ch
 
     The ``internal_name`` and ``keep_gross_if_rate_changes`` attributes have been added.
 
+.. versionchanged:: 2023.6
+
+    The ``custom_rules`` attribute has been added.
+
 Endpoints
 ---------
 
@@ -68,6 +77,7 @@ Endpoints
             "price_includes_tax": true,
             "eu_reverse_charge": false,
             "keep_gross_if_rate_changes": false,
+            "custom_rules": null,
             "home_country": "DE"
           }
         ]
@@ -108,6 +118,7 @@ Endpoints
         "price_includes_tax": true,
         "eu_reverse_charge": false,
         "keep_gross_if_rate_changes": false,
+        "custom_rules": null,
         "home_country": "DE"
       }
 
@@ -156,6 +167,7 @@ Endpoints
         "price_includes_tax": true,
         "eu_reverse_charge": false,
         "keep_gross_if_rate_changes": false,
+        "custom_rules": null,
         "home_country": "DE"
       }
 
@@ -203,6 +215,7 @@ Endpoints
         "price_includes_tax": true,
         "eu_reverse_charge": false,
         "keep_gross_if_rate_changes": false,
+        "custom_rules": null,
         "home_country": "DE"
       }
 
@@ -242,3 +255,5 @@ Endpoints
    :statuscode 204: no error
    :statuscode 401: Authentication failure
    :statuscode 403: The requested organizer/event/rule does not exist **or** you have no permission to change it **or** this tax rule cannot be deleted since it is currently in use.
+
+.. _here: https://github.com/pretix/pretix/blob/master/src/pretix/static/schema/tax-rules-custom.schema.json

doc/api/resources/webhooks.rst

@@ -50,6 +50,10 @@ The following values for ``action_types`` are valid with pretix core:
     * ``pretix.event.order.payment.confirmed``
     * ``pretix.event.order.approved``
     * ``pretix.event.order.denied``
+    * ``pretix.event.orders.waitinglist.added``
+    * ``pretix.event.orders.waitinglist.changed``
+    * ``pretix.event.orders.waitinglist.deleted``
+    * ``pretix.event.orders.waitinglist.voucher_assigned``
     * ``pretix.event.checkin``
     * ``pretix.event.checkin.reverted``
     * ``pretix.event.added``
@@ -63,6 +67,9 @@ The following values for ``action_types`` are valid with pretix core:
     * ``pretix.event.live.deactivated``
     * ``pretix.event.testmode.activated``
     * ``pretix.event.testmode.deactivated``
+    * ``pretix.customer.created``
+    * ``pretix.customer.changed``
+    * ``pretix.customer.anonymized``
 
 Installed plugins might register more valid values.
 

doc/development/api/customview.rst

@@ -18,13 +18,13 @@ If you want to add a custom view to the control area of an event, just register
 
 .. code-block:: python
 
-    from django.conf.urls import url
+    from django.urls import re_path
 
     from . import views
 
     urlpatterns = [
-        url(r'^control/event/(?P<organizer>[^/]+)/(?P<event>[^/]+)/mypluginname/',
+        re_path(r'^control/event/(?P<organizer>[^/]+)/(?P<event>[^/]+)/mypluginname/',
-            views.admin_view, name='backend'),
+                views.admin_view, name='backend'),
     ]
 
 It is required that your URL parameters are called ``organizer`` and ``event``. If you want to

doc/development/api/general.rst

@@ -61,7 +61,7 @@ Backend
              item_formsets, order_search_filter_q, order_search_forms
 
 .. automodule:: pretix.base.signals
-   :members: logentry_display, logentry_object_link, requiredaction_display, timeline_events, orderposition_blocked_display
+   :members: logentry_display, logentry_object_link, requiredaction_display, timeline_events, orderposition_blocked_display, customer_created, customer_signed_in
 
 Vouchers
 """"""""

doc/development/api/payment.rst

@@ -70,6 +70,8 @@ The provider class
 
    .. autoattribute:: settings_form_fields
 
+   .. autoattribute:: walletqueries
+
    .. automethod:: settings_form_clean
 
    .. automethod:: settings_content_render

doc/development/implementation/i18n.rst

@@ -37,7 +37,7 @@ you to execute a piece of code with a different locale:
 This is very useful e.g. when sending an email to a user that has a different language than the user performing the
 action that causes the mail to be sent.
 
-.. _translation features: https://docs.djangoproject.com/en/1.9/topics/i18n/translation/
+.. _translation features: https://docs.djangoproject.com/en/4.2/topics/i18n/translation/
 .. _GNU gettext: https://www.gnu.org/software/gettext/
 .. _strings: https://django-i18nfield.readthedocs.io/en/latest/strings.html
 .. _database fields: https://django-i18nfield.readthedocs.io/en/latest/quickstart.html

doc/development/implementation/urlconfig.rst

@@ -15,33 +15,41 @@ and the admin panel is available at ``https://pretix.eu/control/event/bigorg/awe
 
 If the organizer now configures a custom domain like ``tickets.bigorg.com``, his event will
 from now on be available on ``https://tickets.bigorg.com/awesomecon/``. The former URL at
-``pretix.eu`` will redirect there. However, the admin panel will still only be available
+``pretix.eu`` will redirect there. It's also possible to do this for just an event, in which
-on ``pretix.eu`` for convenience and security reasons.
+case the event will be available on ``https://tickets.awesomecon.org/``.
+
+However, the admin panel will still only be available on ``pretix.eu`` for convenience and security reasons.
 
 URL routing
 -----------
 
 The hard part about implementing this URL routing in Django is that
 ``https://pretix.eu/bigorg/awesomecon/`` contains two parameters of nearly arbitrary content
-and ``https://tickets.bigorg.com/awesomecon/`` contains only one. The only robust way to do
+and ``https://tickets.bigorg.com/awesomecon/`` contains only one and ``https://tickets.awesomecon.org/`` does not contain any.
-this is by having *separate* URL configuration for those two cases. In pretix, we call the
+The only robust way to do this is by having *separate* URL configuration for those three cases.
-former our ``maindomain`` config and the latter our ``subdomain`` config. For pretix's core
-modules we do some magic to avoid duplicate configuration, but for a fairly simple plugin with
-only a handful of routes, we recommend just configuring the two URL sets separately.
 
+In pretix, we therefore do not have a global URL configuration, but three, living in the following modules:
+
+- ``pretix.multidomain.maindomain_urlconf``
+- ``pretix.multidomain.organizer_domain_urlconf``
+- ``pretix.multidomain.event_domain_urlconf``
+
+We provide some helper utilities to work with these to avoid duplicate configuration of the individual URLs.
 The file ``urls.py`` inside your plugin package will be loaded and scanned for URL configuration
 automatically and should be provided by any plugin that provides any view.
+However, unlike plain Django, we look not only for a ``urlpatterns`` attribute on the module but support other
+attributes like ``event_patterns`` and ``organizer_patterns`` as well.
 
-A very basic example that provides one view in the admin panel and one view in the frontend
+For example, for a simple plugin that adds one URL to the backend and one event-level URL to the frontend, you can
-could look like this::
+create the following configuration in your ``urls.py``::
 
-    from django.conf.urls import url
+    from django.urls import re_path
 
     from . import views
 
     urlpatterns = [
-        url(r'^control/event/(?P<organizer>[^/]+)/(?P<event>[^/]+)/mypluginname/',
+        re_path(r'^control/event/(?P<organizer>[^/]+)/(?P<event>[^/]+)/mypluginname/',
-            views.AdminView.as_view(), name='backend'),
+                views.AdminView.as_view(), name='backend'),
     ]
 
     event_patterns = [
@@ -52,7 +60,7 @@ could look like this::
     As you can see, the view in the frontend is not included in the standard Django ``urlpatterns``
     setting but in a separate list with the name ``event_patterns``. This will automatically prepend
     the appropriate parameters to the regex (e.g. the event or the event and the organizer, depending
-    on the called domain).
+    on the called domain). For organizer-level views, ``organizer_patterns`` works the same way.
 
 If you only provide URLs in the admin area, you do not need to provide a ``event_patterns`` attribute.
 
@@ -71,11 +79,16 @@ is a python method that emulates a behavior similar to ``reverse``:
 
 .. autofunction:: pretix.multidomain.urlreverse.eventreverse
 
+If you need to communicate the URL externally, you can use a different method to ensure that it is always an absolute URL:
+
+.. autofunction:: pretix.multidomain.urlreverse.build_absolute_uri
+
 In addition, there is a template tag that works similar to ``url`` but takes an event or organizer object
 as its first argument and can be used like this::
 
     {% load eventurl %}
     <a href="{% eventurl request.event "presale:event.checkout" step="payment" %}">Pay</a>
+    <a href="{% abseventurl request.event "presale:event.checkout" step="payment" %}">Pay</a>
 
 
 Implementation details

doc/development/index.rst

@@ -12,3 +12,4 @@ Developer documentation
    api/index
    structure
    translation/index
+   nfc/index

doc/development/nfc/index.rst

@@ -0,0 +1,15 @@
+NFC media
+=========
+
+pretix supports using NFC chips as "reusable media", for example to store gift cards or tickets.
+
+Most of this implementation currently lives in our proprietary app pretixPOS, but in the future might also become part of our open-source pretixSCAN solution.
+Either way, we want this to be an open ecosystem and therefore document the exact mechanisms in use on the following pages.
+
+We support multiple implementations of NFC media, each documented on its own page:
+
+.. toctree::
+   :maxdepth: 2
+
+   uid
+   mf0aes

doc/development/nfc/mf0aes.rst

@@ -0,0 +1,113 @@
+Mifare Ultralight AES
+=====================
+
+We offer an implementation that provides a higher security level than the UID-based approach and uses the `Mifare Ultralight AES`_ chip sold by NXP.
+We believe the security model of this approach is adequate to the situation where this will usually be used and we'll outline known risks below.
+
+If you want to dive deeper into the properties of the Mifare Ultralight AES chip, we recommend reading the `data sheet`_.
+
+Random UIDs
+-----------
+
+Mifare Ultralight AES supports a feature that returns a randomized UID every time a non-authenticated user tries to
+read the UID. This has a strong privacy benefit, since no unauthorized entity can use the NFC chips to track users.
+On the other hand, this reduces interoperability of the system. For example, this prevents you from using the same NFC
+chips for a different purpose where you only need the UID. This will also prevent your guests from reading their UID
+themselves with their phones, which might be useful e.g. in debugging situations.
+
+Since there's no one-size-fits-all choice here, you can enable or disable this feature in the pretix organizer
+settings. If you change it, the change will apply to all newly encoded chips after the change.
+
+Key management
+--------------
+
+For every organizer, the server will generate create a "key set", which consists of a publicly known ID (random 32-bit integer) and two 16-byte keys ("diversification key" and "UID key").
+
+Using our :ref:`Device authentication mechanism <rest-deviceauth>`, an authorized device can submit a locally generated RSA public key to the server.
+This key can no longer changed on the server once it is set, thus protecting against the attack scenario of a leaked device API token.
+
+The server will then include key sets in the response to ``/api/v1/device/info``, encrypted with the device's RSA key.
+This includes all key sets generated for the organizer the device belongs to, as well as all keys of organizers that have granted sufficient access to this organizer.
+
+The device will decrypt the key sets using its RSA key and store the key sets locally.
+
+.. warning:: The device **will** have access to the raw key sets. Therefore, there is a risk of leaked master keys if an
+             authorized device is stolen or abused. Our implementation in pretixPOS attempts to make this very hard on
+             modern, non-rooted Android devices by keeping them encrypted with the RSA key and only storing the RSA key
+             in the hardware-backed keystore of the device. A sufficiently motivated attacker, however, will likely still
+             be able to extract the keys from a stolen device.
+
+Encoding a chip
+---------------
+
+When a new chip is encoded, the following steps will be taken:
+
+- The UID of the chip is retrieved.
+
+- A chip-specific key is generated using the mechanism documented in `AN10922`_ using the "diversification key" from the
+  organizer's key set as the CMAC key and the diversification input concatenated in the from of ``0x01 + UID + APPID + SYSTEMID``
+  with the following values:
+
+  - The UID of the chip as ``UID``
+
+  - ``"eu.pretix"`` (``0x65 0x75 0x2e 0x70 0x72 0x65 0x74 0x69 0x78``) as ``APPID``
+
+  - The ``public_id`` from the organizer's key set as a 4-byte big-endian value as ``SYSTEMID``
+
+- The chip-specific key is written to the chip as the "data protection key" (config pages 0x30 to 0x33)
+
+- The UID key from the organizer's key set is written to the chip as the "UID retrieval key" (config pages 0x34 to 0x37)
+
+- The config page 0x29 is set like this:
+
+  - ``RID_ACT`` (random UID) to ``1`` or ``0`` based on the organizer's configuration
+  - ``SEC_MSG_ACT`` (secure messaging) to ``1``
+  - ``AUTH0`` (first page that needs authentication) to 0x04 (first non-UID page)
+
+- The config page 0x2A is set like this:
+
+  - ``PROT`` to ``0`` (only write access restricted, not read access)
+  - ``AUTHLIM`` to ``256`` (maximum number of wrong authentications before "self-desctruction")
+  - Everything else to its default value (no lock bits are set)
+
+- The ``public_id`` of the key set will be written to page 0x04 as a big-endian value
+
+- The UID of the chip will be registered as a reusable medium on the server.
+
+.. warning:: During encoding, the chip-specific key and the UID key are transmitted in plain text over the air. The
+             security model therefore relies on the encoding of chips being performed in a trusted physical environment
+             to prevent a nearby attacker from sniffing the keys with a strong antenna.
+
+.. note:: If an attacker tries to authenticate with the chip 256 times using the wrong key, the chip will become
+          unusable. A chip may also become unusable if it is detached from the reader in the middle of the encoding
+          process (even though we've tried to implement it in a way that makes this unlikely).
+
+Usage
+-----
+
+When a chip is presented to the NFC reader, the following steps will be taken:
+
+- Command ``GET_VERSION`` is used to determine if it is a Mifare Ultralight AES chip (if not, abort).
+
+- Page 0x04 is read. If it is all zeroes, the chip is considered un-encoded (abort). If it contains a value that
+  corresponds to the ``public_id`` of a known key set, this key set is used for all further operations. If it contains
+  a different value, we consider this chip to belong to a different organizer or not to a pretix system at all (abort).
+
+- An authentication with the chip using the UID key is performed.
+
+- The UID of the chip will be read.
+
+- The chip-specific key will be derived using the mechanism described above in the encoding step.
+
+- An authentication with the chip using the chip-specific key is performed. If this is fully successful, this step
+  proves that the chip knows the same chip-specific key as we do and is therefore an authentic chip encoded by us and
+  we can trust its UID value.
+
+- The UID is transmitted to the server to fetch the correct medium.
+
+During these steps, the keys are never transmitted in plain text and can thus not be sniffed by a nearby attacker
+with a strong antenna.
+
+.. _Mifare Ultralight AES: https://www.nxp.com/products/rfid-nfc/mifare-hf/mifare-ultralight/mifare-ultralight-aes-enhanced-security-for-limited-use-contactless-applications:MF0AESx20
+.. _data sheet: https://www.nxp.com/docs/en/data-sheet/MF0AES(H)20.pdf
+.. _AN10922: https://www.nxp.com/docs/en/application-note/AN10922.pdf

doc/development/nfc/uid.rst

@@ -0,0 +1,10 @@
+UID-based
+=========
+
+With UID-based NFC, only the unique ID (UID) of the NFC chip is used for identification purposes.
+This can be used with virtually all NFC chips that provide compatibility with the NFC reader in use, typically at least all chips that comply with ISO/IEC 14443-3A.
+
+We make only one restriction: The UID may not start with ``08``, since that usually signifies a randomized UID that changes on every read (which would not be very useful).
+
+.. warning:: The UID-based approach provides only a very low level of security. It is easy to clone a chip with the same
+             UID and impersonate someone else.

doc/development/setup.rst

@@ -96,6 +96,20 @@ http://localhost:8000/control/ for the admin view.
           port (for example because you develop on `pretixdroid`_), you can check
           `Django's documentation`_ for more options.
 
+When running the local development webserver, ensure Celery is not configured
+in ``pretix.cfg``. i.e., you should remove anything such as::
+
+    [celery]
+    backend=redis://redis:6379/2
+    broker=redis://redis:6379/2
+
+If you choose to use Celery for development, you must also start a Celery worker
+process::
+
+    celery -A pretix.celery_app worker -l info
+
+However, beware that code changes will not auto-reload within Celery.
+
 .. _`checksandtests`:
 
 Code checks and unit tests

doc/plugins/epaybl.rst

@@ -0,0 +1,143 @@
+ePayBL
+======
+
+.. note::
+
+    Since ePayBL is only available to german federal, provincial and communal entities, the following page is also
+    only provided in german. Should you require assistance with ePayBL and do not speak this language, please feel free
+    reach out to support@pretix.eu.
+
+
+Einführung
+----------
+
+.. note::
+
+    Sollten Sie lediglich schnell entscheiden wollen, welcher Kontierungsmodus in den Einstellungen des pretix
+    ePayBL-plugins gewählt werden soll, so springen Sie direkt zur Sektion :ref:`Kontierungsmodus`.
+
+
+`ePayBL`_ - das ePayment-System von Bund und Länder - ist das am weitesten verbreitete Zahlungssystem für Bundes-, Länder-
+sowie kommunale Aufgabenträger. Während es nur wie eines von vielen anderen Zahlungssystemen scheint, so bietet es
+seinen Nutzern besondere Vorteile, wie die automatische Erfassung von Zahlungsbelegen, dem Übertragen von Buchungen in
+Haushaltskassen/-systeme sowie die automatische Erfassung von Kontierungen und Steuermerkmalen.
+
+Rein technisch gesehen ist ePayBL hierbei nicht ein eigenständiger Zahlungsdienstleister sondern nur ein eine Komponente
+im komplexen System, dass die Zahlungsabwicklung für Kommunen und Behörden ist.
+
+Im folgenden der schematische Aufbau einer Umgebung, in welcher ePayBL zum Einsatz kommt:
+
+.. figure:: img/epaybl_flowchart.png
+   :class: screenshot
+
+   Quelle: Integrationshandbuch ePayBL-Konnektor, DResearch Digital Media Systems GmbH
+
+
+In diesem Schaubild stellt pretix, bzw. die von Ihnen als Veranstalter angelegten Ticketshops, das Fachverfahren dar.
+
+ePayBL stellt das Bindeglied zwischen den Fachverfahren, Haushaltssystemen und dem eigentlichen Zahlungsdienstleister,
+dem sog. ZV-Provider dar. Dieser ZV-Provider ist die Stelle, welche die eigentlichen Kundengelder einzieht und an den
+Händler auszahlt. Das Gros der Zahlungsdienstleister unterstützt pretix hierbei auch direkt; sprich: Sollten Sie die
+Anbindung an Ihre Haushaltssysteme nicht benötigen, kann eine direkte Anbindung in der Regel ebenso - und dies bei meist
+vermindertem Aufwand - vorgenommen werden.
+
+In der Vergangenheit zeigte sich jedoch schnell, dass nicht jeder IT-Dienstleister immer sofort die neueste Version von
+ePayBL seinen Nutzern angeboten hat. Die Gründe hierfür sind mannigfaltig: Von fest vorgegebenen Update-Zyklen bis hin
+zu Systeme mit speziellen Anpassungen, kann leider nicht davon ausgegangen werden, dass alle ePayBL-Systeme exakt gleich
+ansprechbar sind - auch wenn es sich dabei eigentlich um einen standardisierten Dienst handelt.
+
+Aus diesem Grund gibt es mit dem ePayBL-Konnektor eine weitere Abstraktionsschicht welche optional zwischen den
+Fachverfahren und dem ePayBL-Server sitzt. Dieser Konnektor wird so gepflegt, dass er zum einen eine dauerhaft
+gleichartige Schnittstelle den Fachverfahren bietet aber gleichzeitig auch mit jeder Version des ePayBL-Servers
+kommunizieren kann - egal wie neu oder alt, wie regulär oder angepasst diese ist.
+
+Im Grunde müsste daher eigentlich immer gesagt werden, dass pretix eine Anbindung an den ePayBL-Konnektor bietet; nicht
+an "ePayBL" oder den "ePayBL-Server". Diese Unterscheidung kann bei der Ersteinrichtung und Anforderung von Zugangsdaten
+von Relevanz sein. Da in der Praxis jedoch beide Begriffe gleichbedeutend genutzt werden, wird im Folgenden auch nur von
+einer ePayBL-Anbindung die Rede sein - auch wenn explizit der Konnektor gemeint ist.
+
+
+.. _`Kontierungsmodus`:
+
+Kontierungsmodus
+----------------
+
+ePayBL ist ein Produkt, welches für die Abwicklung von Online-Zahlungsvorgängen in der Verwaltung geschaffen wurde. Ein
+Umfeld, in dem klar definiert ist, was ein Kunde gerade bezahlt und wohin das Geld genau fließt. Diese Annahmen lassen
+sich in einem Ticketshop wie pretix jedoch nur teilweise genauso abbilden.
+
+Die ePayBL-Integration für pretix bietet daher zwei unterschiedliche Modi an, wie Buchungen erfasst und an ePayBL und
+damit auch an die dahinterliegenden Haushaltssysteme gemeldet werden können.
+
+Kontierung pro Position/Artikel
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Dieser Modus versucht den klassischen, behördentypischen ePayBL-Zahlungsvorgang abzubilden: Jede einzelne Position, die
+ein Kunde in den Warenkorb legt, wird auch genauso 1:1 an ePayBL und die Hintergrundsysteme übermittelt.
+
+Hierbei muss zwingend auch für jede Position ein Kennzeichen für Haushaltsstelle und Objektnummer, sowie optional ein
+Kontierungsobjekt (``HREF``; bspw. ``stsl=Steuerschlüssel;psp=gsb:Geschäftsbereich,auft:Innenauftrag,kst:Kostenstelle;``
+) übermittelt werden.
+
+Diese Daten sind vom Veranstalter entsprechend für jeden in der Veranstaltung angelegten Artikel innerhalb des Tabs
+"Zusätzliche Einstellungen" der Produkteinstellungen zu hinterlegen.
+
+Während diese Einstellung eine größtmögliche Menge an Kontierungsdaten überträgt und auch ein separates Verbuchen von
+Leistungen auf unterschiedliche Haushaltsstellen erlaubt, so hat diese Option auch einen großen Nachteil: Der Kunde kann
+nur eine Zahlung für seine Bestellung leisten.
+
+Während sich dies nicht nach einem großen Problem anhört, so kann dies beim Kunden zu Frust führen. pretix bietet die
+Option an, dass ein Veranstalter eine Bestellung jederzeit verändern kann: Ändern von Preisen von Positionen in einer
+aufgegebenen Bestellung, Zubuchen und Entfernen von Bestellpositionen, etc. Hat der Kunde seine ursprüngliche Bestellung
+jedoch schon bezahlt, kann pretix nicht mehr die komplette Bestellung mit den passenden Kontierungen übertragen - es
+müsste nur ein Differenz-Abbild zwischen Ursprungsbestellung und aktueller Bestellung übertragen werden. Aber auch wenn
+eine "Nachmeldung" möglich wäre, so wäre ein konkretes Auflösen für was jetzt genau gezahlt wird, nicht mehr möglich.
+
+Daher gilt bei der Nutzung der Kontierung pro Position/Artikel: Der Kunde kann nur eine (erfolgreiche) Zahlung auf seine
+Bestellung leisten.
+
+Eine weitere Einschränkung dieses Modus ist, dass aktuell keine Gebühren-Positionen (Versandkosten, Zahlungs-, Storno-
+oder Servicegebühren) in diesem Modus übertragen werden können. Bitte wenden Sie sich an uns, wenn Sie diese
+Funktionalität benötigen.
+
+
+Kontierung pro Zahlvorgang
+^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Dieser Modus verabschiedet sich vom behördlichen "Jede Position gehört genau zu einem Haushaltskonto und muss genau
+zugeordnet werden". Stattdessen werden alle Bestellpositionen - inklusive eventuell definierter Gebühren - vermengt und
+nur als ein großer Warenkorb, genauer gesagt: eine einzige Position an ePayBL sowie die Hintergrundsysteme gemeldet.
+
+Während im "pro Postion/Artikel"-Modus jeder Artikel einzeln übermittelt wird und damit auch korrekt pro Artikel der
+jeweilige Brutto- und Nettopreis, sowie der anfallende Steuerbetrag und ein Steuerkennzeichen (mit Hilfe des optionalen
+``HREF``-Attributs) übermittelt werden, ist dies im "pro Zahlvorgang"-Modus nicht möglich.
+
+Stattdessen übermittelt pretix nur einen Betrag für den gesamten Warenkorb: Bruttopreis == Nettopreis. Der Steuerbetrag
+wird hierbei als 0 übermittelt.
+
+Die Angabe einer Haushaltsstelle und Objektnummer, sowie optional der ``HREF``-Kontierungsinformationen ist jedoch
+weiterhin notwendig - allerdings nicht mehr individuell für jeden Artikel/jede Position sondern nur für die gesamte
+Bestellung. Diese Daten sind direkt in den ePayBL-Einstellungen der Veranstaltung unter Einstellungen -> Zahlung ->
+ePayBL vorzunehmen
+
+In der Praxis bedeutet dies, dass in einem angeschlossenen Haushaltssystem nicht nachvollzogen kann, welche Positionen
+konkret erworben und bezahlt wurden - stattdessen kann nur der Fakt, dass etwas verkauft wurde erfasst werden.
+
+Je nach Aufbau und Vorgaben der Finanzbuchhaltung kann dies jedoch ausreichend sein - wenn bspw. eine Ferienfahrt
+angeboten wird und seitens der Haushaltssysteme nicht erfasst werden muss, wie viel vom Gesamtbetrag einer Bestellung
+auf die Ferienfahrt an sich, auf einen Zubringerbus und einen Satz Bettwäsche entfallen ist, sondern (vereinfacht
+gesagt) es ausreichend ist, dass "Eine Summe X für die Haushaltsstelle/Objektnummer geflossen ist".
+
+Dieser Modus der Kontierung bietet Ihnen auch als Vorteil gegenüber dem vorhergehenden an, dass die Bestellungen der
+Kunden jederzeit erweitert und verändert werden können - auch wenn die Ursprungsbestellung schon bezahlt wurde und nur
+noch eine Differenz gezahlt wird.
+
+
+Einschränkungen
+---------------
+
+Zum aktuellen Zeitpunkt erlaubt die pretix-Anbindung an ePayBL nicht das durchführen von Erstattungen von bereits
+geleisteten Zahlungen. Der Prozess hierfür unterscheidet sich von Behörde zu Behörde und muss daher händisch
+durchgeführt werden.
+
+.. _ePayBL: https://www.epaybl.de/

doc/plugins/index.rst

@@ -18,6 +18,7 @@ If you want to **create** a plugin, please go to the
    campaigns
    certificates
    digital
+   epaybl
    exhibitors
    shipping
    imported_secrets

pyproject.toml

@@ -22,7 +22,7 @@ classifiers = [
   "Programming Language :: Python :: 3.9",
   "Programming Language :: Python :: 3.10",
   "Programming Language :: Python :: 3.11",
-  "Framework :: Django :: 3.2",
+  "Framework :: Django :: 4.1",
 ]
 
 dependencies = [
@@ -30,13 +30,13 @@ dependencies = [
   "babel",
   "BeautifulSoup4==4.12.*",
   "bleach==5.0.*",
-  "celery==5.2.*",
+  "celery==5.3.*",
   "chardet==5.1.*",
   "cryptography>=3.4.2",
   "css-inline==0.8.*",
   "defusedcsv>=1.1.0",
   "dj-static",
-  "Django==3.2.*,>=3.2.18",
+  "Django==4.2.*",
   "django-bootstrap3==23.1.*",
   "django-compressor==4.3.*",
   "django-countries==7.5.*",
@@ -49,7 +49,6 @@ dependencies = [
   "django-libsass==0.9",
   "django-localflavor==4.0",
   "django-markup",
-  "django-mysql",
   "django-oauth-toolkit==2.2.*",
   "django-otp==1.2.*",
   "django-phonenumber-field==7.1.*",
@@ -60,10 +59,10 @@ dependencies = [
   "dnspython==2.3.*",
   "drf_ujson2==1.7.*",
   "geoip2==4.*",
-  "importlib_metadata==6.6.*",  # Polyfill, we can probably drop this once we require Python 3.10+
+  "importlib_metadata==6.*",  # Polyfill, we can probably drop this once we require Python 3.10+
   "isoweek",
   "jsonschema",
-  "kombu==5.2.*",
+  "kombu==5.3.*",
   "libsass==0.22.*",
   "lxml",
   "markdown==3.4.3",  # 3.3.5 requires importlib-metadata>=4.4, but django-bootstrap3 requires importlib-metadata<3.
@@ -74,9 +73,10 @@ dependencies = [
   "packaging",
   "paypalrestsdk==1.13.*",
   "paypal-checkout-serversdk==1.0.*",
-  "PyJWT==2.6.*",
+  "PyJWT==2.7.*",
   "phonenumberslite==8.13.*",
   "Pillow==9.5.*",
+  "pretix-plugin-build",
   "protobuf==4.23.*",
   "psycopg2-binary",
   "pycountry",
@@ -87,11 +87,12 @@ dependencies = [
   "python-dateutil==2.8.*",
   "python-u2flib-server==4.*",
   "pytz",
+  "pytz-deprecation-shim==0.1.*",
   "pyuca",
   "qrcode==7.4.*",
-  "redis==4.5.*,>=4.5.4",
+  "redis==4.6.*",
   "reportlab==4.0.*",
-  "requests==2.30.*",
+  "requests==2.31.*",
   "sentry-sdk==1.15.*",
   "sepaxml==2.6.*",
   "slimit",
@@ -108,10 +109,10 @@ dependencies = [
 
 [project.optional-dependencies]
 memcached = ["pylibmc"]
-mysql = ["mysqlclient"]
 dev = [
   "coverage",
   "coveralls",
+  "fakeredis==2.18.*",
   "flake8==6.0.*",
   "freezegun",
   "isort==5.12.*",
@@ -125,7 +126,7 @@ dev = [
   "pytest-mock==3.10.*",
   "pytest-rerunfailures==11.*",
   "pytest-sugar",
-  "pytest-xdist==3.2.*",
+  "pytest-xdist==3.3.*",
   "pytest==7.3.*",
   "responses",
 ]

setup.py

@@ -29,7 +29,6 @@ sys.path.append(str(Path.cwd() / 'src'))
 
 
 def _CustomBuild(*args, **kwargs):
-    print(sys.path)
     from pretix._build import CustomBuild
     return CustomBuild(*args, **kwargs)
 

src/pretix/__init__.py

@@ -19,4 +19,4 @@
 # You should have received a copy of the GNU Affero General Public License along with this program.  If not, see
 # <https://www.gnu.org/licenses/>.
 #
-__version__ = "4.21.0.dev0"
+__version__ = "2023.8.0.dev0"

src/pretix/_base_settings.py

@@ -30,7 +30,6 @@ from django.utils.translation import gettext_lazy as _  # NOQA
 BASE_DIR = os.path.dirname(os.path.dirname(__file__))
 
 USE_I18N = True
-USE_L10N = True
 USE_TZ = True
 
 INSTALLED_APPS = [
@@ -68,6 +67,7 @@ INSTALLED_APPS = [
     'oauth2_provider',
     'phonenumber_field',
     'statici18n',
+    'django.forms',  # after pretix.base for overrides
 ]
 
 FORMAT_MODULE_PATH = [
@@ -180,6 +180,8 @@ TEMPLATES = [
     },
 ]
 
+FORM_RENDERER = "django.forms.renderers.TemplatesSetting"
+
 STATIC_ROOT = os.path.join(os.path.dirname(__file__), 'static.dist')
 
 STATICFILES_FINDERS = (
@@ -194,7 +196,14 @@ STATICFILES_DIRS = [
 
 STATICI18N_ROOT = os.path.join(BASE_DIR, "pretix/static")
 
-STATICFILES_STORAGE = 'django.contrib.staticfiles.storage.ManifestStaticFilesStorage'
+STORAGES = {
+    "default": {
+        "BACKEND": "django.core.files.storage.FileSystemStorage",
+    },
+    "staticfiles": {
+        "BACKEND": "django.contrib.staticfiles.storage.ManifestStaticFilesStorage",
+    },
+}
 
 # if os.path.exists(os.path.join(DATA_DIR, 'static')):
 #     STATICFILES_DIRS.insert(0, os.path.join(DATA_DIR, 'static'))

src/pretix/_build.py

@@ -45,6 +45,10 @@ def npm_install():
 
 class CustomBuild(build):
     def run(self):
+        if "src" not in os.listdir(".") or "pretix" not in os.listdir("src"):
+            # Only run this command on the pretix module, not on other modules even if it's registered globally
+            # in some cases
+            return build.run(self)
         if "PRETIX_DOCKER_BUILD" in os.environ:
             return  # this is a hack to allow calling this file early in our docker build to make use of caching
         os.environ.setdefault("DJANGO_SETTINGS_MODULE", "pretix._build_settings")
@@ -68,6 +72,10 @@ class CustomBuild(build):
 
 class CustomBuildExt(build_ext):
     def run(self):
+        if "src" not in os.listdir(".") or "pretix" not in os.listdir("src"):
+            # Only run this command on the pretix module, not on other modules even if it's registered globally
+            # in some cases
+            return build_ext.run(self)
         if "PRETIX_DOCKER_BUILD" in os.environ:
             return  # this is a hack to allow calling this file early in our docker build to make use of caching
         npm_install()

src/pretix/api/auth/devicesecurity.py

@@ -223,6 +223,7 @@ class PretixPosSecurityProfile(AllowListSecurityProfile):
         ('POST', 'api-v1:checkinrpc.redeem'),
         ('GET', 'api-v1:checkinrpc.search'),
         ('POST', 'api-v1:reusablemedium-lookup'),
+        ('POST', 'api-v1:reusablemedium-list'),
     )
 
 

src/pretix/api/middleware.py

@@ -59,7 +59,7 @@ class IdempotencyMiddleware:
         auth_hash = sha1(auth_hash_parts.encode()).hexdigest()
         idempotency_key = request.headers.get('X-Idempotency-Key', '')
 
-        with transaction.atomic():
+        with transaction.atomic(durable=True):
             call, created = ApiCall.objects.select_for_update(of=OF_SELF).get_or_create(
                 auth_hash=auth_hash,
                 idempotency_key=idempotency_key,
@@ -75,7 +75,7 @@ class IdempotencyMiddleware:
 
         if created:
             resp = self.get_response(request)
-            with transaction.atomic():
+            with transaction.atomic(durable=True):
                 if resp.status_code in (409, 429, 500, 503):
                     # This is the exception: These calls are *meant* to be retried!
                     call.delete()

src/pretix/api/serializers/__init__.py

@@ -19,6 +19,8 @@
 # You should have received a copy of the GNU Affero General Public License along with this program.  If not, see
 # <https://www.gnu.org/licenses/>.
 #
+import json
+
 from rest_framework import serializers
 
 
@@ -46,3 +48,16 @@ class AsymmetricField(serializers.Field):
 
     def run_validation(self, data=serializers.empty):
         return self.write.run_validation(data)
+
+
+class CompatibleJSONField(serializers.JSONField):
+    def to_internal_value(self, data):
+        try:
+            return json.dumps(data)
+        except (TypeError, ValueError):
+            self.fail('invalid')
+
+    def to_representation(self, value):
+        if value:
+            return json.loads(value)
+        return value

src/pretix/api/serializers/discount.py

@@ -32,11 +32,13 @@ class DiscountSerializer(I18nAwareModelSerializer):
                   'available_until', 'subevent_mode', 'condition_all_products', 'condition_limit_products',
                   'condition_apply_to_addons', 'condition_min_count', 'condition_min_value',
                   'benefit_discount_matching_percent', 'benefit_only_apply_to_cheapest_n_matches',
-                  'condition_ignore_voucher_discounted')
+                  'benefit_same_products', 'benefit_limit_products', 'benefit_apply_to_addons',
+                  'benefit_ignore_voucher_discounted', 'condition_ignore_voucher_discounted')
 
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
         self.fields['condition_limit_products'].queryset = self.context['event'].items.all()
+        self.fields['benefit_limit_products'].queryset = self.context['event'].items.all()
 
     def validate(self, data):
         data = super().validate(data)

src/pretix/api/serializers/event.py

@@ -46,6 +46,7 @@ from rest_framework import serializers
 from rest_framework.fields import ChoiceField, Field
 from rest_framework.relations import SlugRelatedField
 
+from pretix.api.serializers import CompatibleJSONField
 from pretix.api.serializers.i18n import I18nAwareModelSerializer
 from pretix.api.serializers.settings import SettingsSerializer
 from pretix.base.models import Device, Event, TaxRule, TeamAPIToken
@@ -53,6 +54,7 @@ from pretix.base.models.event import SubEvent
 from pretix.base.models.items import (
     ItemMetaProperty, SubEventItem, SubEventItemVariation,
 )
+from pretix.base.models.tax import CustomRulesValidator
 from pretix.base.services.seating import (
     SeatProtected, generate_seats, validate_plan_change,
 )
@@ -650,9 +652,16 @@ class SubEventSerializer(I18nAwareModelSerializer):
 
 
 class TaxRuleSerializer(CountryFieldMixin, I18nAwareModelSerializer):
+    custom_rules = CompatibleJSONField(
+        validators=[CustomRulesValidator()],
+        required=False,
+        allow_null=True,
+    )
+
     class Meta:
         model = TaxRule
-        fields = ('id', 'name', 'rate', 'price_includes_tax', 'eu_reverse_charge', 'home_country', 'internal_name', 'keep_gross_if_rate_changes')
+        fields = ('id', 'name', 'rate', 'price_includes_tax', 'eu_reverse_charge', 'home_country', 'internal_name',
+                  'keep_gross_if_rate_changes', 'custom_rules')
 
 
 class EventSettingsSerializer(SettingsSerializer):
@@ -719,6 +728,7 @@ class EventSettingsSerializer(SettingsSerializer):
         'payment_term_minutes',
         'payment_term_last',
         'payment_term_expire_automatically',
+        'payment_term_expire_delay_days',
         'payment_term_accept_late',
         'payment_explanation',
         'payment_pending_hidden',
@@ -807,6 +817,10 @@ class EventSettingsSerializer(SettingsSerializer):
         'reusable_media_type_nfc_uid',
         'reusable_media_type_nfc_uid_autocreate_giftcard',
         'reusable_media_type_nfc_uid_autocreate_giftcard_currency',
+        'reusable_media_type_nfc_mf0aes',
+        'reusable_media_type_nfc_mf0aes_autocreate_giftcard',
+        'reusable_media_type_nfc_mf0aes_autocreate_giftcard_currency',
+        'reusable_media_type_nfc_mf0aes_random_uid',
     ]
     readonly_fields = [
         # These are read-only since they are currently only settable on organizers, not events
@@ -816,6 +830,10 @@ class EventSettingsSerializer(SettingsSerializer):
         'reusable_media_type_nfc_uid',
         'reusable_media_type_nfc_uid_autocreate_giftcard',
         'reusable_media_type_nfc_uid_autocreate_giftcard_currency',
+        'reusable_media_type_nfc_mf0aes',
+        'reusable_media_type_nfc_mf0aes_autocreate_giftcard',
+        'reusable_media_type_nfc_mf0aes_autocreate_giftcard_currency',
+        'reusable_media_type_nfc_mf0aes_random_uid',
     ]
 
     def __init__(self, *args, **kwargs):
@@ -884,6 +902,8 @@ class DeviceEventSettingsSerializer(EventSettingsSerializer):
         'name_scheme',
         'reusable_media_type_barcode',
         'reusable_media_type_nfc_uid',
+        'reusable_media_type_nfc_mf0aes',
+        'reusable_media_type_nfc_mf0aes_random_uid',
         'system_question_order',
     ]
 

src/pretix/api/serializers/exporters.py

@@ -93,7 +93,7 @@ class JobRunSerializer(serializers.Serializer):
         if events is not None and not isinstance(ex, OrganizerLevelExportMixin):
             self.fields["events"] = serializers.SlugRelatedField(
                 queryset=events,
-                required=True,
+                required=False,
                 allow_empty=False,
                 slug_field='slug',
                 many=True
@@ -156,8 +156,9 @@ class JobRunSerializer(serializers.Serializer):
     def to_internal_value(self, data):
         if isinstance(data, QueryDict):
             data = data.copy()
+
         for k, v in self.fields.items():
-            if isinstance(v, serializers.ManyRelatedField) and k not in data:
+            if isinstance(v, serializers.ManyRelatedField) and k not in data and k != "events":
                 data[k] = []
 
         for fk in self.fields.keys():

src/pretix/api/serializers/media.py

@@ -60,6 +60,8 @@ class NestedGiftCardSerializer(GiftCardSerializer):
 
 
 class ReusableMediaSerializer(I18nAwareModelSerializer):
+    organizer = serializers.SlugRelatedField(slug_field='slug', read_only=True)
+
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
 
@@ -111,6 +113,7 @@ class ReusableMediaSerializer(I18nAwareModelSerializer):
         model = ReusableMedium
         fields = (
             'id',
+            'organizer',
             'created',
             'updated',
             'type',

src/pretix/api/serializers/order.py

@@ -19,7 +19,6 @@
 # You should have received a copy of the GNU Affero General Public License along with this program.  If not, see
 # <https://www.gnu.org/licenses/>.
 #
-import json
 import logging
 import os
 from collections import Counter, defaultdict
@@ -28,6 +27,7 @@ from decimal import Decimal
 import pycountry
 from django.conf import settings
 from django.core.files import File
+from django.db import models
 from django.db.models import F, Q
 from django.utils.encoding import force_str
 from django.utils.timezone import now
@@ -39,6 +39,7 @@ from rest_framework.exceptions import ValidationError
 from rest_framework.relations import SlugRelatedField
 from rest_framework.reverse import reverse
 
+from pretix.api.serializers import CompatibleJSONField
 from pretix.api.serializers.event import SubEventSerializer
 from pretix.api.serializers.i18n import I18nAwareModelSerializer
 from pretix.api.serializers.item import (
@@ -283,11 +284,12 @@ class FailedCheckinSerializer(I18nAwareModelSerializer):
     raw_item = serializers.PrimaryKeyRelatedField(queryset=Item.objects.none(), required=False, allow_null=True)
     raw_variation = serializers.PrimaryKeyRelatedField(queryset=ItemVariation.objects.none(), required=False, allow_null=True)
     raw_subevent = serializers.PrimaryKeyRelatedField(queryset=SubEvent.objects.none(), required=False, allow_null=True)
+    nonce = serializers.CharField(required=False, allow_null=True)
 
     class Meta:
         model = Checkin
         fields = ('error_reason', 'error_explanation', 'raw_barcode', 'raw_item', 'raw_variation',
-                  'raw_subevent', 'datetime', 'type', 'position')
+                  'raw_subevent', 'nonce', 'datetime', 'type', 'position')
 
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
@@ -372,11 +374,15 @@ class PdfDataSerializer(serializers.Field):
                 self.context['vars_images'] = get_images(self.context['event'])
 
             for k, f in self.context['vars'].items():
-                try:
+                if 'evaluate_bulk' in f:
-                    res[k] = f['evaluate'](instance, instance.order, ev)
+                    # Will be evaluated later by our list serializers
-                except:
+                    res[k] = (f['evaluate_bulk'], instance)
-                    logger.exception('Evaluating PDF variable failed')
+                else:
-                    res[k] = '(error)'
+                    try:
+                        res[k] = f['evaluate'](instance, instance.order, ev)
+                    except:
+                        logger.exception('Evaluating PDF variable failed')
+                        res[k] = '(error)'
 
             if not hasattr(ev, '_cached_meta_data'):
                 ev._cached_meta_data = ev.meta_data
@@ -429,6 +435,38 @@ class PdfDataSerializer(serializers.Field):
             return res
 
 
+class OrderPositionListSerializer(serializers.ListSerializer):
+
+    def to_representation(self, data):
+        # We have a custom implementation of this method because PdfDataSerializer() might keep some elements unevaluated
+        # with a (callable, input) tuple. We'll loop over these entries and evaluate them bulk-wise to save on SQL queries.
+
+        if isinstance(self.parent, OrderSerializer) and isinstance(self.parent.parent, OrderListSerializer):
+            # Do not execute our custom code because it will be executed by OrderListSerializer later for the
+            # full result set.
+            return super().to_representation(data)
+
+        iterable = data.all() if isinstance(data, models.Manager) else data
+
+        data = []
+        evaluate_queue = defaultdict(list)
+
+        for item in iterable:
+            entry = self.child.to_representation(item)
+            if "pdf_data" in entry:
+                for k, v in entry["pdf_data"].items():
+                    if isinstance(v, tuple) and callable(v[0]):
+                        evaluate_queue[v[0]].append((v[1], entry, k))
+            data.append(entry)
+
+        for func, entries in evaluate_queue.items():
+            results = func([item for (item, entry, k) in entries])
+            for (item, entry, k), result in zip(entries, results):
+                entry["pdf_data"][k] = result
+
+        return data
+
+
 class OrderPositionSerializer(I18nAwareModelSerializer):
     checkins = CheckinSerializer(many=True, read_only=True)
     answers = AnswerSerializer(many=True)
@@ -440,6 +478,7 @@ class OrderPositionSerializer(I18nAwareModelSerializer):
     attendee_name = serializers.CharField(required=False)
 
     class Meta:
+        list_serializer_class = OrderPositionListSerializer
         model = OrderPosition
         fields = ('id', 'order', 'positionid', 'item', 'variation', 'price', 'attendee_name', 'attendee_name_parts',
                   'company', 'street', 'zipcode', 'city', 'country', 'state', 'discount',
@@ -468,6 +507,20 @@ class OrderPositionSerializer(I18nAwareModelSerializer):
     def validate(self, data):
         raise TypeError("this serializer is readonly")
 
+    def to_representation(self, data):
+        if isinstance(self.parent, (OrderListSerializer, OrderPositionListSerializer)):
+            # Do not execute our custom code because it will be executed by OrderListSerializer later for the
+            # full result set.
+            return super().to_representation(data)
+
+        entry = super().to_representation(data)
+        if "pdf_data" in entry:
+            for k, v in entry["pdf_data"].items():
+                if isinstance(v, tuple) and callable(v[0]):
+                    entry["pdf_data"][k] = v[0]([v[1]])[0]
+
+        return entry
+
 
 class RequireAttentionField(serializers.Field):
     def to_representation(self, instance: OrderPosition):
@@ -535,8 +588,9 @@ class OrderPaymentTypeField(serializers.Field):
     # TODO: Remove after pretix 2.2
     def to_representation(self, instance: Order):
         t = None
-        for p in instance.payments.all():
+        if instance.pk:
-            t = p.provider
+            for p in instance.payments.all():
+                t = p.provider
         return t
 
 
@@ -544,10 +598,10 @@ class OrderPaymentDateField(serializers.DateField):
     # TODO: Remove after pretix 2.2
     def to_representation(self, instance: Order):
         t = None
-        for p in instance.payments.all():
+        if instance.pk:
-            t = p.payment_date or t
+            for p in instance.payments.all():
+                t = p.payment_date or t
         if t:
-
             return super().to_representation(t.date())
 
 
@@ -561,7 +615,7 @@ class PaymentURLField(serializers.URLField):
     def to_representation(self, instance: OrderPayment):
         if instance.state != OrderPayment.PAYMENT_STATE_CREATED:
             return None
-        return build_absolute_uri(self.context['event'], 'presale:event.order.pay', kwargs={
+        return build_absolute_uri(instance.order.event, 'presale:event.order.pay', kwargs={
             'order': instance.order.code,
             'secret': instance.order.secret,
             'payment': instance.pk,
@@ -606,13 +660,42 @@ class OrderRefundSerializer(I18nAwareModelSerializer):
 
 class OrderURLField(serializers.URLField):
     def to_representation(self, instance: Order):
-        return build_absolute_uri(self.context['event'], 'presale:event.order', kwargs={
+        return build_absolute_uri(instance.event, 'presale:event.order', kwargs={
             'order': instance.code,
             'secret': instance.secret,
         })
 
 
+class OrderListSerializer(serializers.ListSerializer):
+
+    def to_representation(self, data):
+        # We have a custom implementation of this method because PdfDataSerializer() might keep some elements
+        # unevaluated with a (callable, input) tuple. We'll loop over these entries and evaluate them bulk-wise to
+        # save on SQL queries.
+        iterable = data.all() if isinstance(data, models.Manager) else data
+
+        data = []
+        evaluate_queue = defaultdict(list)
+
+        for item in iterable:
+            entry = self.child.to_representation(item)
+            for p in entry.get("positions", []):
+                if "pdf_data" in p:
+                    for k, v in p["pdf_data"].items():
+                        if isinstance(v, tuple) and callable(v[0]):
+                            evaluate_queue[v[0]].append((v[1], p, k))
+            data.append(entry)
+
+        for func, entries in evaluate_queue.items():
+            results = func([item for (item, entry, k) in entries])
+            for (item, entry, k), result in zip(entries, results):
+                entry["pdf_data"][k] = result
+
+        return data
+
+
 class OrderSerializer(I18nAwareModelSerializer):
+    event = SlugRelatedField(slug_field='slug', read_only=True)
     invoice_address = InvoiceAddressSerializer(allow_null=True)
     positions = OrderPositionSerializer(many=True, read_only=True)
     fees = OrderFeeSerializer(many=True, read_only=True)
@@ -626,8 +709,9 @@ class OrderSerializer(I18nAwareModelSerializer):
 
     class Meta:
         model = Order
+        list_serializer_class = OrderListSerializer
         fields = (
-            'code', 'status', 'testmode', 'secret', 'email', 'phone', 'locale', 'datetime', 'expires', 'payment_date',
+            'code', 'event', 'status', 'testmode', 'secret', 'email', 'phone', 'locale', 'datetime', 'expires', 'payment_date',
             'payment_provider', 'fees', 'total', 'comment', 'custom_followup_at', 'invoice_address', 'positions', 'downloads',
             'checkin_attention', 'last_modified', 'payments', 'refunds', 'require_approval', 'sales_channel',
             'url', 'customer', 'valid_if_pending'
@@ -895,19 +979,6 @@ class OrderPositionCreateSerializer(I18nAwareModelSerializer):
         return data
 
 
-class CompatibleJSONField(serializers.JSONField):
-    def to_internal_value(self, data):
-        try:
-            return json.dumps(data)
-        except (TypeError, ValueError):
-            self.fail('invalid')
-
-    def to_representation(self, value):
-        if value:
-            return json.loads(value)
-        return value
-
-
 class WrappedList:
     def __init__(self, data):
         self._data = data
@@ -1363,6 +1434,7 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
                         answers.append(answ)
                     pos.answers = answers
                     pos.pseudonymization_id = "PREVIEW"
+                    pos.checkins = []
                     pos_map[pos.positionid] = pos
                 else:
                     if pos.voucher:
@@ -1459,6 +1531,8 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
         if simulate:
             order.fees = fees
             order.positions = pos_map.values()
+            order.payments = []
+            order.refunds = []
             return order  # ignore payments
         else:
             order.save(update_fields=['total'])
@@ -1521,6 +1595,7 @@ class InlineInvoiceLineSerializer(I18nAwareModelSerializer):
 
 
 class InvoiceSerializer(I18nAwareModelSerializer):
+    event = SlugRelatedField(slug_field='slug', read_only=True)
     order = serializers.SlugRelatedField(slug_field='code', read_only=True)
     refers = serializers.SlugRelatedField(slug_field='full_invoice_no', read_only=True)
     lines = InlineInvoiceLineSerializer(many=True)
@@ -1529,7 +1604,7 @@ class InvoiceSerializer(I18nAwareModelSerializer):
 
     class Meta:
         model = Invoice
-        fields = ('order', 'number', 'is_cancellation', 'invoice_from', 'invoice_from_name', 'invoice_from_zipcode',
+        fields = ('event', 'order', 'number', 'is_cancellation', 'invoice_from', 'invoice_from_name', 'invoice_from_zipcode',
                   'invoice_from_city', 'invoice_from_country', 'invoice_from_tax_id', 'invoice_from_vat_id',
                   'invoice_to', 'invoice_to_company', 'invoice_to_name', 'invoice_to_street', 'invoice_to_zipcode',
                   'invoice_to_city', 'invoice_to_state', 'invoice_to_country', 'invoice_to_vat_id', 'invoice_to_beneficiary',

src/pretix/api/serializers/organizer.py

@@ -36,9 +36,9 @@ from pretix.api.serializers.settings import SettingsSerializer
 from pretix.base.auth import get_auth_backends
 from pretix.base.i18n import get_language_without_region
 from pretix.base.models import (
-    Customer, Device, GiftCard, GiftCardTransaction, Membership,
+    Customer, Device, GiftCard, GiftCardAcceptance, GiftCardTransaction,
-    MembershipType, OrderPosition, Organizer, ReusableMedium, SeatingPlan,
+    Membership, MembershipType, OrderPosition, Organizer, ReusableMedium,
-    Team, TeamAPIToken, TeamInvite, User,
+    SeatingPlan, Team, TeamAPIToken, TeamInvite, User,
 )
 from pretix.base.models.seating import SeatingPlanLayoutValidator
 from pretix.base.services.mail import SendMailException, mail
@@ -94,6 +94,14 @@ class CustomerSerializer(I18nAwareModelSerializer):
             data['name_parts']['_scheme'] = self.context['request'].organizer.settings.name_scheme
         return data
 
+    def validate_email(self, value):
+        qs = Customer.objects.filter(organizer=self.context['organizer'], email__iexact=value)
+        if self.instance and self.instance.pk:
+            qs = qs.exclude(pk=self.instance.pk)
+        if qs.exists():
+            raise ValidationError(_("An account with this email address is already registered."))
+        return value
+
 
 class CustomerCreateSerializer(CustomerSerializer):
     send_email = serializers.BooleanField(default=False, required=False, allow_null=True)
@@ -183,8 +191,11 @@ class GiftCardSerializer(I18nAwareModelSerializer):
             qs = GiftCard.objects.filter(
                 secret=s
             ).filter(
-                Q(issuer=self.context["organizer"]) | Q(
+                Q(issuer=self.context["organizer"]) |
-                    issuer__gift_card_collector_acceptance__collector=self.context["organizer"])
+                Q(issuer__in=GiftCardAcceptance.objects.filter(
+                    acceptor=self.context["organizer"],
+                    active=True,
+                ).values_list('issuer', flat=True))
             )
             if self.instance:
                 qs = qs.exclude(pk=self.instance.pk)
@@ -248,6 +259,8 @@ class DeviceSerializer(serializers.ModelSerializer):
     unique_serial = serializers.CharField(read_only=True)
     hardware_brand = serializers.CharField(read_only=True)
     hardware_model = serializers.CharField(read_only=True)
+    os_name = serializers.CharField(read_only=True)
+    os_version = serializers.CharField(read_only=True)
     software_brand = serializers.CharField(read_only=True)
     software_version = serializers.CharField(read_only=True)
     created = serializers.DateTimeField(read_only=True)
@@ -260,7 +273,7 @@ class DeviceSerializer(serializers.ModelSerializer):
         fields = (
             'device_id', 'unique_serial', 'initialization_token', 'all_events', 'limit_events',
             'revoked', 'name', 'created', 'initialized', 'hardware_brand', 'hardware_model',
-            'software_brand', 'software_version', 'security_profile'
+            'os_name', 'os_version', 'software_brand', 'software_version', 'security_profile'
         )
 
 
@@ -387,6 +400,9 @@ class OrganizerSettingsSerializer(SettingsSerializer):
         'reusable_media_type_nfc_uid',
         'reusable_media_type_nfc_uid_autocreate_giftcard',
         'reusable_media_type_nfc_uid_autocreate_giftcard_currency',
+        'reusable_media_type_nfc_mf0aes',
+        'reusable_media_type_nfc_mf0aes_autocreate_giftcard',
+        'reusable_media_type_nfc_mf0aes_autocreate_giftcard_currency',
     ]
 
     def __init__(self, *args, **kwargs):

src/pretix/api/urls.py

@@ -35,8 +35,7 @@
 import importlib
 
 from django.apps import apps
-from django.conf.urls import re_path
+from django.urls import include, re_path
-from django.urls import include
 from rest_framework import routers
 
 from pretix.api.views import cart
@@ -62,6 +61,8 @@ orga_router.register(r'membershiptypes', organizer.MembershipTypeViewSet)
 orga_router.register(r'reusablemedia', media.ReusableMediaViewSet)
 orga_router.register(r'teams', organizer.TeamViewSet)
 orga_router.register(r'devices', organizer.DeviceViewSet)
+orga_router.register(r'orders', order.OrganizerOrderViewSet)
+orga_router.register(r'invoices', order.InvoiceViewSet)
 orga_router.register(r'exporters', exporters.OrganizerExportersViewSet, basename='exporters')
 
 team_router = routers.DefaultRouter()
@@ -78,7 +79,7 @@ event_router.register(r'questions', item.QuestionViewSet)
 event_router.register(r'discounts', discount.DiscountViewSet)
 event_router.register(r'quotas', item.QuotaViewSet)
 event_router.register(r'vouchers', voucher.VoucherViewSet)
-event_router.register(r'orders', order.OrderViewSet)
+event_router.register(r'orders', order.EventOrderViewSet)
 event_router.register(r'orderpositions', order.OrderPositionViewSet)
 event_router.register(r'invoices', order.InvoiceViewSet)
 event_router.register(r'revokedsecrets', order.RevokedSecretViewSet, basename='revokedsecrets')

src/pretix/api/views/checkin.py

@@ -164,8 +164,21 @@ class CheckinListViewSet(viewsets.ModelViewSet):
                 secret=serializer.validated_data['raw_barcode']
             ).first()
 
+        clist = self.get_object()
+        if serializer.validated_data.get('nonce'):
+            if kwargs.get('position'):
+                prev = kwargs['position'].all_checkins.filter(nonce=serializer.validated_data['nonce']).first()
+            else:
+                prev = clist.checkins.filter(
+                    nonce=serializer.validated_data['nonce'],
+                    raw_barcode=serializer.validated_data['raw_barcode'],
+                ).first()
+            if prev:
+                # Ignore because nonce is already handled
+                return Response(serializer.data, status=201)
+
         c = serializer.save(
-            list=self.get_object(),
+            list=clist,
             successful=False,
             forced=True,
             force_sent=True,
@@ -396,7 +409,7 @@ def _checkin_list_position_queryset(checkinlists, ignore_status=False, ignore_pr
 
 def _redeem_process(*, checkinlists, raw_barcode, answers_data, datetime, force, checkin_type, ignore_unpaid, nonce,
                     untrusted_input, user, auth, expand, pdf_data, request, questions_supported, canceled_supported,
-                    source_type='barcode', legacy_url_support=False):
+                    source_type='barcode', legacy_url_support=False, simulate=False):
     if not checkinlists:
         raise ValidationError('No check-in list passed.')
 
@@ -433,6 +446,8 @@ def _redeem_process(*, checkinlists, raw_barcode, answers_data, datetime, force,
     )
     raw_barcode_for_checkin = None
     from_revoked_secret = False
+    if simulate:
+        common_checkin_args['__fake_arg_to_prevent_this_from_being_saved'] = True
 
     # 1. Gather a list of positions that could be the one we looking for, either from their ID, secret or
     #    parent secret
@@ -472,13 +487,14 @@ def _redeem_process(*, checkinlists, raw_barcode, answers_data, datetime, force,
             revoked_matches = list(
                 RevokedTicketSecret.objects.filter(event_id__in=list_by_event.keys(), secret=raw_barcode))
             if len(revoked_matches) == 0:
-                checkinlists[0].event.log_action('pretix.event.checkin.unknown', data={
+                if not simulate:
-                    'datetime': datetime,
+                    checkinlists[0].event.log_action('pretix.event.checkin.unknown', data={
-                    'type': checkin_type,
+                        'datetime': datetime,
-                    'list': checkinlists[0].pk,
+                        'type': checkin_type,
-                    'barcode': raw_barcode,
+                        'list': checkinlists[0].pk,
-                    'searched_lists': [cl.pk for cl in checkinlists]
+                        'barcode': raw_barcode,
-                }, user=user, auth=auth)
+                        'searched_lists': [cl.pk for cl in checkinlists]
+                    }, user=user, auth=auth)
 
                 for cl in checkinlists:
                     for k, s in cl.event.ticket_secret_generators.items():
@@ -492,12 +508,13 @@ def _redeem_process(*, checkinlists, raw_barcode, answers_data, datetime, force,
                         except:
                             pass
 
-                Checkin.objects.create(
+                if not simulate:
-                    position=None,
+                    Checkin.objects.create(
-                    successful=False,
+                        position=None,
-                    error_reason=Checkin.REASON_INVALID,
+                        successful=False,
-                    **common_checkin_args,
+                        error_reason=Checkin.REASON_INVALID,
-                )
+                        **common_checkin_args,
+                    )
 
                 if force and legacy_url_support and isinstance(auth, Device):
                     # There was a bug in libpretixsync: If you scanned a ticket in offline mode that was
@@ -539,19 +556,20 @@ def _redeem_process(*, checkinlists, raw_barcode, answers_data, datetime, force,
                 from_revoked_secret = True
             else:
                 op = revoked_matches[0].position
-                op.order.log_action('pretix.event.checkin.revoked', data={
+                if not simulate:
-                    'datetime': datetime,
+                    op.order.log_action('pretix.event.checkin.revoked', data={
-                    'type': checkin_type,
+                        'datetime': datetime,
-                    'list': list_by_event[revoked_matches[0].event_id].pk,
+                        'type': checkin_type,
-                    'barcode': raw_barcode
+                        'list': list_by_event[revoked_matches[0].event_id].pk,
-                }, user=user, auth=auth)
+                        'barcode': raw_barcode
-                common_checkin_args['list'] = list_by_event[revoked_matches[0].event_id]
+                    }, user=user, auth=auth)
-                Checkin.objects.create(
+                    common_checkin_args['list'] = list_by_event[revoked_matches[0].event_id]
-                    position=op,
+                    Checkin.objects.create(
-                    successful=False,
+                        position=op,
-                    error_reason=Checkin.REASON_REVOKED,
+                        successful=False,
-                    **common_checkin_args
+                        error_reason=Checkin.REASON_REVOKED,
-                )
+                        **common_checkin_args
+                    )
                 return Response({
                     'status': 'error',
                     'reason': Checkin.REASON_REVOKED,
@@ -588,24 +606,25 @@ def _redeem_process(*, checkinlists, raw_barcode, answers_data, datetime, force,
             # We choose the first match (regardless of product) for the logging since it's most likely to be the
             # base product according to our order_by above.
             op = op_candidates[0]
-            op.order.log_action('pretix.event.checkin.denied', data={
+            if not simulate:
-                'position': op.id,
+                op.order.log_action('pretix.event.checkin.denied', data={
-                'positionid': op.positionid,
+                    'position': op.id,
-                'errorcode': Checkin.REASON_AMBIGUOUS,
+                    'positionid': op.positionid,
-                'reason_explanation': None,
+                    'errorcode': Checkin.REASON_AMBIGUOUS,
-                'force': force,
+                    'reason_explanation': None,
-                'datetime': datetime,
+                    'force': force,
-                'type': checkin_type,
+                    'datetime': datetime,
-                'list': list_by_event[op.order.event_id].pk,
+                    'type': checkin_type,
-            }, user=user, auth=auth)
+                    'list': list_by_event[op.order.event_id].pk,
-            common_checkin_args['list'] = list_by_event[op.order.event_id]
+                }, user=user, auth=auth)
-            Checkin.objects.create(
+                common_checkin_args['list'] = list_by_event[op.order.event_id]
-                position=op,
+                Checkin.objects.create(
-                successful=False,
+                    position=op,
-                error_reason=Checkin.REASON_AMBIGUOUS,
+                    successful=False,
-                error_explanation=None,
+                    error_reason=Checkin.REASON_AMBIGUOUS,
-                **common_checkin_args,
+                    error_explanation=None,
-            )
+                    **common_checkin_args,
+                )
             return Response({
                 'status': 'error',
                 'reason': Checkin.REASON_AMBIGUOUS,
@@ -652,6 +671,7 @@ def _redeem_process(*, checkinlists, raw_barcode, answers_data, datetime, force,
                 raw_barcode=raw_barcode_for_checkin,
                 raw_source_type=source_type,
                 from_revoked_secret=from_revoked_secret,
+                simulate=simulate,
             )
         except RequiredQuestionsError as e:
             return Response({
@@ -664,23 +684,24 @@ def _redeem_process(*, checkinlists, raw_barcode, answers_data, datetime, force,
                 'list': MiniCheckinListSerializer(list_by_event[op.order.event_id]).data,
             }, status=400)
         except CheckInError as e:
-            op.order.log_action('pretix.event.checkin.denied', data={
+            if not simulate:
-                'position': op.id,
+                op.order.log_action('pretix.event.checkin.denied', data={
-                'positionid': op.positionid,
+                    'position': op.id,
-                'errorcode': e.code,
+                    'positionid': op.positionid,
-                'reason_explanation': e.reason,
+                    'errorcode': e.code,
-                'force': force,
+                    'reason_explanation': e.reason,
-                'datetime': datetime,
+                    'force': force,
-                'type': checkin_type,
+                    'datetime': datetime,
-                'list': list_by_event[op.order.event_id].pk,
+                    'type': checkin_type,
-            }, user=user, auth=auth)
+                    'list': list_by_event[op.order.event_id].pk,
-            Checkin.objects.create(
+                }, user=user, auth=auth)
-                position=op,
+                Checkin.objects.create(
-                successful=False,
+                    position=op,
-                error_reason=e.code,
+                    successful=False,
-                error_explanation=e.reason,
+                    error_reason=e.code,
-                **common_checkin_args,
+                    error_explanation=e.reason,
-            )
+                    **common_checkin_args,
+                )
             return Response({
                 'status': 'error',
                 'reason': e.code,

src/pretix/api/views/device.py

@@ -19,8 +19,12 @@
 # You should have received a copy of the GNU Affero General Public License along with this program.  If not, see
 # <https://www.gnu.org/licenses/>.
 #
+import base64
 import logging
 
+from cryptography.hazmat.backends.openssl.backend import Backend
+from cryptography.hazmat.primitives.asymmetric import padding
+from cryptography.hazmat.primitives.serialization import load_pem_public_key
 from django.db.models import Exists, OuterRef, Q
 from django.db.models.functions import Coalesce
 from django.utils.timezone import now
@@ -34,6 +38,8 @@ from pretix.api.auth.device import DeviceTokenAuthentication
 from pretix.api.views.version import numeric_version
 from pretix.base.models import CheckinList, Device, SubEvent
 from pretix.base.models.devices import Gate, generate_api_token
+from pretix.base.models.media import MediumKeySet
+from pretix.base.services.media import get_keysets_for_organizer
 
 logger = logging.getLogger(__name__)
 
@@ -42,17 +48,73 @@ class InitializationRequestSerializer(serializers.Serializer):
     token = serializers.CharField(max_length=190)
     hardware_brand = serializers.CharField(max_length=190)
     hardware_model = serializers.CharField(max_length=190)
+    os_name = serializers.CharField(max_length=190, required=False, allow_null=True)
+    os_version = serializers.CharField(max_length=190, required=False, allow_null=True)
     software_brand = serializers.CharField(max_length=190)
     software_version = serializers.CharField(max_length=190)
     info = serializers.JSONField(required=False, allow_null=True)
+    rsa_pubkey = serializers.CharField(required=False, allow_null=True)
+
+    def validate(self, attrs):
+        if attrs.get('rsa_pubkey'):
+            try:
+                load_pem_public_key(
+                    attrs['rsa_pubkey'].encode(), Backend()
+                )
+            except:
+                raise ValidationError({'rsa_pubkey': ['Not a valid public key.']})
+        return attrs
 
 
 class UpdateRequestSerializer(serializers.Serializer):
     hardware_brand = serializers.CharField(max_length=190)
     hardware_model = serializers.CharField(max_length=190)
+    os_name = serializers.CharField(max_length=190, required=False, allow_null=True)
+    os_version = serializers.CharField(max_length=190, required=False, allow_null=True)
     software_brand = serializers.CharField(max_length=190)
     software_version = serializers.CharField(max_length=190)
     info = serializers.JSONField(required=False, allow_null=True)
+    rsa_pubkey = serializers.CharField(required=False, allow_null=True)
+
+    def validate(self, attrs):
+        if attrs.get('rsa_pubkey'):
+            try:
+                load_pem_public_key(
+                    attrs['rsa_pubkey'].encode(), Backend()
+                )
+            except:
+                raise ValidationError({'rsa_pubkey': ['Not a valid public key.']})
+        return attrs
+
+
+class RSAEncryptedField(serializers.Field):
+    def to_representation(self, value):
+        public_key = load_pem_public_key(
+            self.context['device'].rsa_pubkey.encode(), Backend()
+        )
+        cipher_text = public_key.encrypt(
+            # RSA/ECB/PKCS1Padding
+            value,
+            padding.PKCS1v15()
+        )
+        return base64.b64encode(cipher_text).decode()
+
+
+class MediumKeySetSerializer(serializers.ModelSerializer):
+    uid_key = RSAEncryptedField(read_only=True)
+    diversification_key = RSAEncryptedField(read_only=True)
+    organizer = serializers.SlugRelatedField(slug_field='slug', read_only=True)
+
+    class Meta:
+        model = MediumKeySet
+        fields = [
+            'public_id',
+            'organizer',
+            'active',
+            'media_type',
+            'uid_key',
+            'diversification_key',
+        ]
 
 
 class GateSerializer(serializers.ModelSerializer):
@@ -99,9 +161,12 @@ class InitializeView(APIView):
         device.initialized = now()
         device.hardware_brand = serializer.validated_data.get('hardware_brand')
         device.hardware_model = serializer.validated_data.get('hardware_model')
+        device.os_name = serializer.validated_data.get('os_name')
+        device.os_version = serializer.validated_data.get('os_version')
         device.software_brand = serializer.validated_data.get('software_brand')
         device.software_version = serializer.validated_data.get('software_version')
         device.info = serializer.validated_data.get('info')
+        device.rsa_pubkey = serializer.validated_data.get('rsa_pubkey')
         device.api_token = generate_api_token()
         device.save()
 
@@ -120,8 +185,15 @@ class UpdateView(APIView):
         device = request.auth
         device.hardware_brand = serializer.validated_data.get('hardware_brand')
         device.hardware_model = serializer.validated_data.get('hardware_model')
+        device.os_name = serializer.validated_data.get('os_name')
+        device.os_version = serializer.validated_data.get('os_version')
         device.software_brand = serializer.validated_data.get('software_brand')
         device.software_version = serializer.validated_data.get('software_version')
+        if serializer.validated_data.get('rsa_pubkey') and serializer.validated_data.get('rsa_pubkey') != device.rsa_pubkey:
+            if device.rsa_pubkey:
+                raise ValidationError({'rsa_pubkey': ['You cannot change the rsa_pubkey of the device once it is set.']})
+            else:
+                device.rsa_pubkey = serializer.validated_data.get('rsa_pubkey')
         device.info = serializer.validated_data.get('info')
         device.save()
         device.log_action('pretix.device.updated', data=serializer.validated_data, auth=device)
@@ -169,8 +241,12 @@ class InfoView(APIView):
                     'pretix': __version__,
                     'pretix_numeric': numeric_version(__version__),
                 }
-            }
+            },
-
+            'medium_key_sets': MediumKeySetSerializer(
+                get_keysets_for_organizer(device.organizer),
+                many=True,
+                context={'device': request.auth}
+            ).data if device.rsa_pubkey else []
         })
 
 

src/pretix/api/views/event.py

@@ -71,6 +71,8 @@ with scopes_disabled():
         ends_after = django_filters.rest_framework.IsoDateTimeFilter(method='ends_after_qs')
         sales_channel = django_filters.rest_framework.CharFilter(method='sales_channel_qs')
         search = django_filters.rest_framework.CharFilter(method='search_qs')
+        date_from = django_filters.rest_framework.IsoDateTimeFromToRangeFilter()
+        date_to = django_filters.rest_framework.IsoDateTimeFromToRangeFilter()
 
         class Meta:
             model = Event
@@ -336,6 +338,8 @@ with scopes_disabled():
         modified_since = django_filters.IsoDateTimeFilter(field_name='last_modified', lookup_expr='gte')
         sales_channel = django_filters.rest_framework.CharFilter(method='sales_channel_qs')
         search = django_filters.rest_framework.CharFilter(method='search_qs')
+        date_from = django_filters.rest_framework.IsoDateTimeFromToRangeFilter()
+        date_to = django_filters.rest_framework.IsoDateTimeFromToRangeFilter()
 
         class Meta:
             model = SubEvent
@@ -411,6 +415,7 @@ class SubEventViewSet(ConditionalListView, viewsets.ModelViewSet):
             'subeventitem_set',
             'subeventitemvariation_set',
             'meta_values',
+            'meta_values__property',
             Prefetch(
                 'seat_category_mappings',
                 to_attr='_seat_category_mappings',

src/pretix/api/views/exporters.py

@@ -133,7 +133,12 @@ class EventExportersViewSet(ExportersMixin, viewsets.ViewSet):
     def exporters(self):
         exporters = []
         responses = register_data_exporters.send(self.request.event)
-        for ex in sorted([response(self.request.event, self.request.organizer) for r, response in responses if response], key=lambda ex: str(ex.verbose_name)):
+        raw_exporters = [response(self.request.event, self.request.organizer) for r, response in responses if response]
+        raw_exporters = [
+            ex for ex in raw_exporters
+            if ex.available_for_user(self.request.user if self.request.user and self.request.user.is_authenticated else None)
+        ]
+        for ex in sorted(raw_exporters, key=lambda ex: str(ex.verbose_name)):
             ex._serializer = JobRunSerializer(exporter=ex)
             exporters.append(ex)
         return exporters
@@ -166,7 +171,7 @@ class OrganizerExportersViewSet(ExportersMixin, viewsets.ViewSet):
             if (
                 not isinstance(ex, OrganizerLevelExportMixin) or
                 perm_holder.has_organizer_permission(self.request.organizer, ex.organizer_required_permission, self.request)
-            )
+            ) and ex.available_for_user(self.request.user if self.request.user and self.request.user.is_authenticated else None)
         ]
         for ex in sorted(raw_exporters, key=lambda ex: str(ex.verbose_name)):
             ex._serializer = JobRunSerializer(exporter=ex, events=events)

src/pretix/api/views/media.py

@@ -39,7 +39,8 @@ from pretix.api.serializers.media import (
 )
 from pretix.base.media import MEDIA_TYPES
 from pretix.base.models import (
-    Checkin, GiftCard, GiftCardTransaction, OrderPosition, ReusableMedium,
+    Checkin, GiftCard, GiftCardAcceptance, GiftCardTransaction, OrderPosition,
+    ReusableMedium,
 )
 from pretix.helpers import OF_SELF
 from pretix.helpers.dicts import merge_dicts
@@ -103,6 +104,12 @@ class ReusableMediaViewSet(viewsets.ModelViewSet):
             auth=self.request.auth,
             data=merge_dicts(self.request.data, {'id': inst.pk})
         )
+        mt = MEDIA_TYPES.get(serializer.validated_data["type"])
+        if mt:
+            m = mt.handle_new(self.request.organizer, inst, self.request.user, self.request.auth)
+            if m:
+                s = self.get_serializer(m)
+                return Response({"result": s.data})
 
     @transaction.atomic()
     def perform_update(self, serializer):
@@ -135,12 +142,28 @@ class ReusableMediaViewSet(viewsets.ModelViewSet):
             s = self.get_serializer(m)
             return Response({"result": s.data})
         except ReusableMedium.DoesNotExist:
-            mt = MEDIA_TYPES.get(s.validated_data["type"])
+            try:
-            if mt:
+                with scopes_disabled():
-                m = mt.handle_unknown(request.organizer, s.validated_data["identifier"], request.user, request.auth)
+                    m = ReusableMedium.objects.get(
-                if m:
+                        organizer__in=GiftCardAcceptance.objects.filter(
-                    s = self.get_serializer(m)
+                            acceptor=request.organizer,
-                    return Response({"result": s.data})
+                            active=True,
+                            reusable_media=True,
+                        ).values_list('issuer', flat=True),
+                        type=s.validated_data["type"],
+                        identifier=s.validated_data["identifier"],
+                    )
+                m.linked_orderposition = None  # not relevant for cross-organizer
+                m.customer = None  # not relevant for cross-organizer
+                s = self.get_serializer(m)
+                return Response({"result": s.data})
+            except ReusableMedium.DoesNotExist:
+                mt = MEDIA_TYPES.get(s.validated_data["type"])
+                if mt:
+                    m = mt.handle_unknown(request.organizer, s.validated_data["identifier"], request.user, request.auth)
+                    if m:
+                        s = self.get_serializer(m)
+                        return Response({"result": s.data})
 
             return Response({"result": None})
 

src/pretix/api/views/order.py

@@ -23,9 +23,9 @@ import datetime
 import mimetypes
 import os
 from decimal import Decimal
+from zoneinfo import ZoneInfo
 
 import django_filters
-import pytz
 from django.db import transaction
 from django.db.models import (
     Exists, F, OuterRef, Prefetch, Q, Subquery, prefetch_related_objects,
@@ -44,6 +44,7 @@ from rest_framework.exceptions import (
     APIException, NotFound, PermissionDenied, ValidationError,
 )
 from rest_framework.mixins import CreateModelMixin
+from rest_framework.permissions import SAFE_METHODS
 from rest_framework.response import Response
 
 from pretix.api.models import OAuthAccessToken
@@ -185,7 +186,7 @@ with scopes_disabled():
             )
 
 
-class OrderViewSet(viewsets.ModelViewSet):
+class OrderViewSetMixin:
     serializer_class = OrderSerializer
     queryset = Order.objects.none()
     filter_backends = (DjangoFilterBackend, TotalOrderingFilter)
@@ -193,19 +194,12 @@ class OrderViewSet(viewsets.ModelViewSet):
     ordering_fields = ('datetime', 'code', 'status', 'last_modified')
     filterset_class = OrderFilter
     lookup_field = 'code'
-    permission = 'can_view_orders'
-    write_permission = 'can_change_orders'
 
-    def get_serializer_context(self):
+    def get_base_queryset(self):
-        ctx = super().get_serializer_context()
+        raise NotImplementedError()
-        ctx['event'] = self.request.event
-        ctx['pdf_data'] = self.request.query_params.get('pdf_data', 'false') == 'true'
-        ctx['exclude'] = self.request.query_params.getlist('exclude')
-        ctx['include'] = self.request.query_params.getlist('include')
-        return ctx
 
     def get_queryset(self):
-        qs = self.request.event.orders
+        qs = self.get_base_queryset()
         if 'fees' not in self.request.GET.getlist('exclude'):
             if self.request.query_params.get('include_canceled_fees', 'false') == 'true':
                 fqs = OrderFee.all
@@ -227,11 +221,12 @@ class OrderViewSet(viewsets.ModelViewSet):
             opq = OrderPosition.all
         else:
             opq = OrderPosition.objects
-        if request.query_params.get('pdf_data', 'false') == 'true':
+        if request.query_params.get('pdf_data', 'false') == 'true' and getattr(request, 'event', None):
             prefetch_related_objects([request.organizer], 'meta_properties')
             prefetch_related_objects(
                 [request.event],
-                Prefetch('meta_values', queryset=EventMetaValue.objects.select_related('property'), to_attr='meta_values_cached'),
+                Prefetch('meta_values', queryset=EventMetaValue.objects.select_related('property'),
+                         to_attr='meta_values_cached'),
                 'questions',
                 'item_meta_properties',
             )
@@ -266,13 +261,12 @@ class OrderViewSet(viewsets.ModelViewSet):
                 )
             )
 
-    def _get_output_provider(self, identifier):
+    def get_serializer_context(self):
-        responses = register_ticket_outputs.send(self.request.event)
+        ctx = super().get_serializer_context()
-        for receiver, response in responses:
+        ctx['exclude'] = self.request.query_params.getlist('exclude')
-            prov = response(self.request.event)
+        ctx['include'] = self.request.query_params.getlist('include')
-            if prov.identifier == identifier:
+        ctx['pdf_data'] = False
-                return prov
+        return ctx
-        raise NotFound('Unknown output provider.')
 
     @scopes_disabled()  # we are sure enough that get_queryset() is correct, so we save some perforamnce
     def list(self, request, **kwargs):
@@ -289,6 +283,45 @@ class OrderViewSet(viewsets.ModelViewSet):
         serializer = self.get_serializer(queryset, many=True)
         return Response(serializer.data, headers={'X-Page-Generated': date})
 
+
+class OrganizerOrderViewSet(OrderViewSetMixin, viewsets.ReadOnlyModelViewSet):
+    def get_base_queryset(self):
+        perm = "can_view_orders" if self.request.method in SAFE_METHODS else "can_change_orders"
+        if isinstance(self.request.auth, (TeamAPIToken, Device)):
+            return Order.objects.filter(
+                event__organizer=self.request.organizer,
+                event__in=self.request.auth.get_events_with_permission(perm)
+            )
+        elif self.request.user.is_authenticated:
+            return Order.objects.filter(
+                event__organizer=self.request.organizer,
+                event__in=self.request.user.get_events_with_permission(perm)
+            )
+        else:
+            raise PermissionDenied()
+
+
+class EventOrderViewSet(OrderViewSetMixin, viewsets.ModelViewSet):
+    permission = 'can_view_orders'
+    write_permission = 'can_change_orders'
+
+    def get_serializer_context(self):
+        ctx = super().get_serializer_context()
+        ctx['event'] = self.request.event
+        ctx['pdf_data'] = self.request.query_params.get('pdf_data', 'false') == 'true'
+        return ctx
+
+    def get_base_queryset(self):
+        return self.request.event.orders
+
+    def _get_output_provider(self, identifier):
+        responses = register_ticket_outputs.send(self.request.event)
+        for receiver, response in responses:
+            prov = response(self.request.event)
+            if prov.identifier == identifier:
+                return prov
+        raise NotFound('Unknown output provider.')
+
     @action(detail=True, url_name='download', url_path='download/(?P<output>[^/]+)')
     def download(self, request, output, **kwargs):
         provider = self._get_output_provider(output)
@@ -612,7 +645,7 @@ class OrderViewSet(viewsets.ModelViewSet):
                 status=status.HTTP_400_BAD_REQUEST
             )
 
-        tz = pytz.timezone(self.request.event.settings.timezone)
+        tz = ZoneInfo(self.request.event.settings.timezone)
         new_date = make_aware(datetime.datetime.combine(
             new_date,
             datetime.time(hour=23, minute=59, second=59)
@@ -661,7 +694,16 @@ class OrderViewSet(viewsets.ModelViewSet):
 
         with language(order.locale, self.request.event.settings.region):
             payment = order.payments.last()
-
+            # OrderCreateSerializer creates at most one payment
+            if payment and payment.state == OrderPayment.PAYMENT_STATE_CONFIRMED:
+                order.log_action(
+                    'pretix.event.order.payment.confirmed', {
+                        'local_id': payment.local_id,
+                        'provider': payment.provider,
+                    },
+                    user=request.user if request.user.is_authenticated else None,
+                    auth=request.auth,
+                )
             order_placed.send(self.request.event, order=order)
             if order.status == Order.STATUS_PAID:
                 order_paid.send(self.request.event, order=order)
@@ -936,6 +978,7 @@ with scopes_disabled():
                 | Q(addon_to__attendee_email__icontains=value)
                 | Q(order__code__istartswith=value)
                 | Q(order__invoice_address__name_cached__icontains=value)
+                | Q(order__invoice_address__company__icontains=value)
                 | Q(order__email__icontains=value)
                 | Q(pk__in=matching_media)
             )
@@ -1772,11 +1815,24 @@ class InvoiceViewSet(viewsets.ReadOnlyModelViewSet):
     write_permission = 'can_change_orders'
 
     def get_queryset(self):
-        return self.request.event.invoices.prefetch_related('lines').select_related('order', 'refers').annotate(
+        perm = "can_view_orders" if self.request.method in SAFE_METHODS else "can_change_orders"
+        if getattr(self.request, 'event', None):
+            qs = self.request.event.invoices
+        elif isinstance(self.request.auth, (TeamAPIToken, Device)):
+            qs = Invoice.objects.filter(
+                event__organizer=self.request.organizer,
+                event__in=self.request.auth.get_events_with_permission(perm)
+            )
+        elif self.request.user.is_authenticated:
+            qs = Invoice.objects.filter(
+                event__organizer=self.request.organizer,
+                event__in=self.request.user.get_events_with_permission(perm)
+            )
+        return qs.prefetch_related('lines').select_related('order', 'refers').annotate(
             nr=Concat('prefix', 'invoice_no')
         )
 
-    @action(detail=True, )
+    @action(detail=True)
     def download(self, request, **kwargs):
         invoice = self.get_object()
 
@@ -1795,7 +1851,7 @@ class InvoiceViewSet(viewsets.ReadOnlyModelViewSet):
         return resp
 
     @action(detail=True, methods=['POST'])
-    def regenerate(self, request, **kwarts):
+    def regenerate(self, request, **kwargs):
         inv = self.get_object()
         if inv.canceled:
             raise ValidationError('The invoice has already been canceled.')
@@ -1805,7 +1861,7 @@ class InvoiceViewSet(viewsets.ReadOnlyModelViewSet):
             raise PermissionDenied('The invoice file is no longer stored on the server.')
         elif inv.sent_to_organizer:
             raise PermissionDenied('The invoice file has already been exported.')
-        elif now().astimezone(self.request.event.timezone).date() - inv.date > datetime.timedelta(days=1):
+        elif now().astimezone(inv.event.timezone).date() - inv.date > datetime.timedelta(days=1):
             raise PermissionDenied('The invoice file is too old to be regenerated.')
         else:
             inv = regenerate_invoice(inv)
@@ -1820,7 +1876,7 @@ class InvoiceViewSet(viewsets.ReadOnlyModelViewSet):
             return Response(status=204)
 
     @action(detail=True, methods=['POST'])
-    def reissue(self, request, **kwarts):
+    def reissue(self, request, **kwargs):
         inv = self.get_object()
         if inv.canceled:
             raise ValidationError('The invoice has already been canceled.')

src/pretix/api/webhooks.py

@@ -189,6 +189,34 @@ class ParametrizedOrderPositionWebhookEvent(ParametrizedOrderWebhookEvent):
         return d
 
 
+class ParametrizedWaitingListEntryWebhookEvent(ParametrizedWebhookEvent):
+
+    def build_payload(self, logentry: LogEntry):
+        # do not use content_object, this is also called in deletion
+        return {
+            'notification_id': logentry.pk,
+            'organizer': logentry.event.organizer.slug,
+            'event': logentry.event.slug,
+            'waitinglistentry': logentry.object_id,
+            'action': logentry.action_type,
+        }
+
+
+class ParametrizedCustomerWebhookEvent(ParametrizedWebhookEvent):
+
+    def build_payload(self, logentry: LogEntry):
+        customer = logentry.content_object
+        if not customer:
+            return None
+
+        return {
+            'notification_id': logentry.pk,
+            'organizer': customer.organizer.slug,
+            'customer': customer.identifier,
+            'action': logentry.action_type,
+        }
+
+
 @receiver(register_webhook_events, dispatch_uid="base_register_default_webhook_events")
 def register_default_webhook_events(sender, **kwargs):
     return (
@@ -321,6 +349,34 @@ def register_default_webhook_events(sender, **kwargs):
             'pretix.event.testmode.deactivated',
             _('Test-Mode of shop has been deactivated'),
         ),
+        ParametrizedWaitingListEntryWebhookEvent(
+            'pretix.event.orders.waitinglist.added',
+            _('Waiting list entry added'),
+        ),
+        ParametrizedWaitingListEntryWebhookEvent(
+            'pretix.event.orders.waitinglist.changed',
+            _('Waiting list entry changed'),
+        ),
+        ParametrizedWaitingListEntryWebhookEvent(
+            'pretix.event.orders.waitinglist.deleted',
+            _('Waiting list entry deleted'),
+        ),
+        ParametrizedWaitingListEntryWebhookEvent(
+            'pretix.event.orders.waitinglist.voucher_assigned',
+            _('Waiting list entry received voucher'),
+        ),
+        ParametrizedCustomerWebhookEvent(
+            'pretix.customer.created',
+            _('Customer account created'),
+        ),
+        ParametrizedCustomerWebhookEvent(
+            'pretix.customer.changed',
+            _('Customer account changed'),
+        ),
+        ParametrizedCustomerWebhookEvent(
+            'pretix.customer.anonymized',
+            _('Customer account anonymized'),
+        ),
     )
 
 

src/pretix/base/cache.py

@@ -62,27 +62,27 @@ class NamespacedCache:
             prefix = int(time.time())
             self.cache.set(self.prefixkey, prefix)
 
-    def set(self, key: str, value: str, timeout: int=300):
+    def set(self, key: str, value: any, timeout: int=300):
         return self.cache.set(self._prefix_key(key), value, timeout)
 
-    def get(self, key: str) -> str:
+    def get(self, key: str) -> any:
         return self.cache.get(self._prefix_key(key, known_prefix=self._last_prefix))
 
-    def get_or_set(self, key: str, default: Callable, timeout=300) -> str:
+    def get_or_set(self, key: str, default: Callable, timeout=300) -> any:
         return self.cache.get_or_set(
             self._prefix_key(key, known_prefix=self._last_prefix),
             default=default,
             timeout=timeout
         )
 
-    def get_many(self, keys: List[str]) -> Dict[str, str]:
+    def get_many(self, keys: List[str]) -> Dict[str, any]:
         values = self.cache.get_many([self._prefix_key(key) for key in keys])
         newvalues = {}
         for k, v in values.items():
             newvalues[self._strip_prefix(k)] = v
         return newvalues
 
-    def set_many(self, values: Dict[str, str], timeout=300):
+    def set_many(self, values: Dict[str, any], timeout=300):
         newvalues = {}
         for k, v in values.items():
             newvalues[self._prefix_key(k)] = v

src/pretix/base/email.py

@@ -134,8 +134,11 @@ class TemplateBasedMailRenderer(BaseHTMLMailRenderer):
     def template_name(self):
         raise NotImplementedError()
 
+    def compile_markdown(self, plaintext):
+        return markdown_compile_email(plaintext)
+
     def render(self, plain_body: str, plain_signature: str, subject: str, order, position) -> str:
-        body_md = markdown_compile_email(plain_body)
+        body_md = self.compile_markdown(plain_body)
         htmlctx = {
             'site': settings.PRETIX_INSTANCE_NAME,
             'site_url': settings.SITE_URL,
@@ -153,7 +156,7 @@ class TemplateBasedMailRenderer(BaseHTMLMailRenderer):
 
         if plain_signature:
             signature_md = plain_signature.replace('\n', '<br>\n')
-            signature_md = markdown_compile_email(signature_md)
+            signature_md = self.compile_markdown(signature_md)
             htmlctx['signature'] = signature_md
 
         if order:

src/pretix/base/exporter.py

@@ -37,8 +37,8 @@ import tempfile
 from collections import OrderedDict, namedtuple
 from decimal import Decimal
 from typing import Optional, Tuple
+from zoneinfo import ZoneInfo
 
-import pytz
 from defusedcsv import csv
 from django import forms
 from django.conf import settings
@@ -68,7 +68,7 @@ class BaseExporter:
             self.events = event
             self.event = None
             e = self.events.first()
-            self.timezone = e.timezone if e else pytz.timezone(settings.TIME_ZONE)
+            self.timezone = e.timezone if e else ZoneInfo(settings.TIME_ZONE)
         else:
             self.events = Event.objects.filter(pk=event.pk)
             self.timezone = event.timezone
@@ -140,7 +140,7 @@ class BaseExporter:
         """
         return {}
 
-    def render(self, form_data: dict) -> Tuple[str, str, bytes]:
+    def render(self, form_data: dict) -> Tuple[str, str, Optional[bytes]]:
         """
         Render the exported file and return a tuple consisting of a filename, a file type
         and file content.
@@ -157,6 +157,13 @@ class BaseExporter:
         """
         raise NotImplementedError()  # NOQA
 
+    def available_for_user(self, user) -> bool:
+        """
+        Allows to do additional checks whether an exporter is available based on the user who calls it. Note that
+        ``user`` may be ``None`` e.g. during API usage.
+        """
+        return True
+
 
 class OrganizerLevelExportMixin:
     @property

src/pretix/base/exporters/orderlist.py

@@ -34,8 +34,8 @@
 
 from collections import OrderedDict
 from decimal import Decimal
+from zoneinfo import ZoneInfo
 
-import pytz
 from django import forms
 from django.db.models import (
     Case, CharField, Count, DateTimeField, F, IntegerField, Max, Min, OuterRef,
@@ -326,7 +326,7 @@ class OrderListExporter(MultiSheetListExporter):
 
         yield self.ProgressSetTotal(total=qs.count())
         for order in qs.order_by('datetime').iterator():
-            tz = pytz.timezone(self.event_object_cache[order.event_id].settings.timezone)
+            tz = ZoneInfo(self.event_object_cache[order.event_id].settings.timezone)
 
             row = [
                 self.event_object_cache[order.event_id].slug,
@@ -459,7 +459,7 @@ class OrderListExporter(MultiSheetListExporter):
         yield self.ProgressSetTotal(total=qs.count())
         for op in qs.order_by('order__datetime').iterator():
             order = op.order
-            tz = pytz.timezone(order.event.settings.timezone)
+            tz = ZoneInfo(order.event.settings.timezone)
             row = [
                 self.event_object_cache[order.event_id].slug,
                 order.code,
@@ -549,7 +549,9 @@ class OrderListExporter(MultiSheetListExporter):
             headers.append(_('End date'))
         headers += [
             _('Product'),
+            _('Product ID'),
             _('Variation'),
+            _('Variation ID'),
             _('Price'),
             _('Tax rate'),
             _('Tax rule'),
@@ -631,7 +633,7 @@ class OrderListExporter(MultiSheetListExporter):
 
             for op in ops:
                 order = op.order
-                tz = pytz.timezone(self.event_object_cache[order.event_id].settings.timezone)
+                tz = ZoneInfo(self.event_object_cache[order.event_id].settings.timezone)
                 row = [
                     self.event_object_cache[order.event_id].slug,
                     order.code,
@@ -656,7 +658,9 @@ class OrderListExporter(MultiSheetListExporter):
                         row.append('')
                 row += [
                     str(op.item),
+                    str(op.item_id),
                     str(op.variation) if op.variation else '',
+                    str(op.variation_id) if op.variation_id else '',
                     op.price,
                     op.tax_rate,
                     str(op.tax_rule) if op.tax_rule else '',
@@ -850,6 +854,8 @@ class TransactionListExporter(ListExporter):
             _('Tax rule ID'),
             _('Tax rule'),
             _('Tax value'),
+            _('Gross total'),
+            _('Tax total'),
         ]
 
         if form_data.get('_format') == 'xlsx':
@@ -901,6 +907,8 @@ class TransactionListExporter(ListExporter):
                 t.tax_rule_id or '',
                 str(t.tax_rule.internal_name or t.tax_rule.name) if t.tax_rule_id else '',
                 t.tax_value,
+                t.price * t.count,
+                t.tax_value * t.count,
             ]
 
             if form_data.get('_format') == 'xlsx':
@@ -1024,7 +1032,7 @@ class PaymentListExporter(ListExporter):
 
         yield self.ProgressSetTotal(total=len(objs))
         for obj in objs:
-            tz = pytz.timezone(obj.order.event.settings.timezone)
+            tz = ZoneInfo(obj.order.event.settings.timezone)
             if isinstance(obj, OrderPayment) and obj.payment_date:
                 d2 = obj.payment_date.astimezone(tz).date().strftime('%Y-%m-%d')
             elif isinstance(obj, OrderRefund) and obj.execution_date:
@@ -1143,7 +1151,7 @@ class GiftcardTransactionListExporter(OrganizerLevelExportMixin, ListExporter):
     def iterate_list(self, form_data):
         qs = GiftCardTransaction.objects.filter(
             card__issuer=self.organizer,
-        ).order_by('datetime').select_related('card', 'order', 'order__event')
+        ).order_by('datetime').select_related('card', 'order', 'order__event', 'acceptor')
 
         if form_data.get('date_range'):
             dt_start, dt_end = resolve_timeframe_to_datetime_start_inclusive_end_exclusive(now(), form_data['date_range'], self.timezone)
@@ -1159,6 +1167,7 @@ class GiftcardTransactionListExporter(OrganizerLevelExportMixin, ListExporter):
             _('Amount'),
             _('Currency'),
             _('Order'),
+            _('Organizer'),
         ]
         yield headers
 
@@ -1170,6 +1179,7 @@ class GiftcardTransactionListExporter(OrganizerLevelExportMixin, ListExporter):
                 obj.value,
                 obj.card.currency,
                 obj.order.full_code if obj.order else None,
+                str(obj.acceptor or ""),
             ]
             yield row
 
@@ -1203,7 +1213,7 @@ class GiftcardRedemptionListExporter(ListExporter):
         yield headers
 
         for obj in objs:
-            tz = pytz.timezone(obj.order.event.settings.timezone)
+            tz = ZoneInfo(obj.order.event.settings.timezone)
             gc = GiftCard.objects.get(pk=obj.info_data.get('gift_card'))
             row = [
                 obj.order.event.slug,

src/pretix/base/exporters/waitinglist.py

@@ -20,8 +20,8 @@
 # <https://www.gnu.org/licenses/>.
 #
 from collections import OrderedDict
+from zoneinfo import ZoneInfo
 
-import pytz
 from django import forms
 from django.db.models import F, Q
 from django.dispatch import receiver
@@ -137,7 +137,7 @@ class WaitingListExporter(ListExporter):
 
             # which event should be used to output dates in columns "Start date" and "End date"
             event_for_date_columns = entry.subevent if entry.subevent else entry.event
-            tz = pytz.timezone(entry.event.settings.timezone)
+            tz = ZoneInfo(entry.event.settings.timezone)
             datetime_format = '%Y-%m-%d %H:%M:%S'
 
             row = [

src/pretix/base/forms/__init__.py

@@ -167,6 +167,7 @@ class SettingsForm(i18nfield.forms.I18nFormMixin, HierarkeyForm):
 
 class PrefixForm(forms.Form):
     prefix = forms.CharField(widget=forms.HiddenInput)
+    template_name = "django/forms/table.html"
 
 
 class SafeSessionWizardView(SessionWizardView):

src/pretix/base/forms/questions.py

@@ -38,10 +38,10 @@ import logging
 from datetime import timedelta
 from decimal import Decimal
 from io import BytesIO
+from zoneinfo import ZoneInfo
 
 import dateutil.parser
 import pycountry
-import pytz
 from django import forms
 from django.conf import settings
 from django.contrib import messages
@@ -61,6 +61,7 @@ from django.utils.timezone import get_current_timezone, now
 from django.utils.translation import gettext_lazy as _, pgettext_lazy
 from django_countries import countries
 from django_countries.fields import Country, CountryField
+from geoip2.errors import AddressNotFoundError
 from phonenumber_field.formfields import PhoneNumberField
 from phonenumber_field.phonenumber import PhoneNumber
 from phonenumber_field.widgets import PhoneNumberPrefixWidget
@@ -356,9 +357,12 @@ class WrappedPhoneNumberPrefixWidget(PhoneNumberPrefixWidget):
 def guess_country_from_request(request, event):
     if settings.HAS_GEOIP:
         g = GeoIP2()
-        res = g.country(get_client_ip(request))
+        try:
-        if res['country_code'] and len(res['country_code']) == 2:
+            res = g.country(get_client_ip(request))
-            return Country(res['country_code'])
+            if res['country_code'] and len(res['country_code']) == 2:
+                return Country(res['country_code'])
+        except AddressNotFoundError:
+            pass
     return guess_country(event)
 
 
@@ -733,7 +737,7 @@ class BaseQuestionsForm(forms.Form):
                 initial = answers[0]
             else:
                 initial = None
-            tz = pytz.timezone(event.settings.timezone)
+            tz = ZoneInfo(event.settings.timezone)
             help_text = rich_text(q.help_text)
             label = escape(q.question)  # django-bootstrap3 calls mark_safe
             required = q.required and not self.all_optional

src/pretix/base/forms/renderers.py

@@ -0,0 +1,63 @@
+#
+# This file is part of pretix (Community Edition).
+#
+# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2020-2021 rami.io GmbH and contributors
+#
+# This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
+# Public License as published by the Free Software Foundation in version 3 of the License.
+#
+# ADDITIONAL TERMS APPLY: Pursuant to Section 7 of the GNU Affero General Public License, additional terms are
+# applicable granting you additional permissions and placing additional restrictions on your usage of this software.
+# Please refer to the pretix LICENSE file to obtain the full terms applicable to this work. If you did not receive
+# this file, see <https://pretix.eu/about/en/license>.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
+# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Affero General Public License along with this program.  If not, see
+# <https://www.gnu.org/licenses/>.
+#
+from bootstrap3.renderers import (
+    FieldRenderer as BaseFieldRenderer,
+    InlineFieldRenderer as BaseInlineFieldRenderer,
+)
+from django.forms import (
+    CheckboxInput, CheckboxSelectMultiple, ClearableFileInput, RadioSelect,
+    SelectDateWidget,
+)
+
+
+class FieldRenderer(BaseFieldRenderer):
+    # Local application of https://github.com/zostera/django-bootstrap3/pull/859
+
+    def post_widget_render(self, html):
+        if isinstance(self.widget, CheckboxSelectMultiple):
+            html = self.list_to_class(html, "checkbox")
+        elif isinstance(self.widget, RadioSelect):
+            html = self.list_to_class(html, "radio")
+        elif isinstance(self.widget, SelectDateWidget):
+            html = self.fix_date_select_input(html)
+        elif isinstance(self.widget, ClearableFileInput):
+            html = self.fix_clearable_file_input(html)
+        elif isinstance(self.widget, CheckboxInput):
+            html = self.put_inside_label(html)
+        return html
+
+
+class InlineFieldRenderer(BaseInlineFieldRenderer):
+    # Local application of https://github.com/zostera/django-bootstrap3/pull/859
+
+    def post_widget_render(self, html):
+        if isinstance(self.widget, CheckboxSelectMultiple):
+            html = self.list_to_class(html, "checkbox")
+        elif isinstance(self.widget, RadioSelect):
+            html = self.list_to_class(html, "radio")
+        elif isinstance(self.widget, SelectDateWidget):
+            html = self.fix_date_select_input(html)
+        elif isinstance(self.widget, ClearableFileInput):
+            html = self.fix_clearable_file_input(html)
+        elif isinstance(self.widget, CheckboxInput):
+            html = self.put_inside_label(html)
+        return html

src/pretix/base/management/commands/_migrations.py

@@ -24,7 +24,7 @@ Django, for theoretically very valid reasons, creates migrations for *every sing
 we change on a model. Even the `help_text`! This makes sense, as we don't know if any
 database backend unknown to us might actually use this information for its database schema.
 
-However, pretix only supports PostgreSQL, MySQL, MariaDB and SQLite and we can be pretty
+However, pretix only supports PostgreSQL and SQLite and we can be pretty
 certain that some changes to models will never require a change to the database. In this case,
 not creating a migration for certain changes will save us some performance while applying them
 *and* allow for a cleaner git history. Win-win!

src/pretix/base/management/commands/export.py

@@ -22,7 +22,7 @@
 import json
 import sys
 
-import pytz
+import pytz_deprecation_shim
 from django.core.management.base import BaseCommand
 from django.utils.timezone import override
 from django_scopes import scope
@@ -60,7 +60,7 @@ class Command(BaseCommand):
             sys.exit(1)
 
         locale = options.get("locale", None)
-        timezone = pytz.timezone(options['timezone']) if options.get('timezone') else None
+        timezone = pytz_deprecation_shim.timezone(options['timezone']) if options.get('timezone') else None
 
         with scope(organizer=o):
             if options['event_slug']:

src/pretix/base/media.py

@@ -49,6 +49,9 @@ class BaseMediaType:
     def handle_unknown(self, organizer, identifier, user, auth):
         pass
 
+    def handle_new(self, organizer, medium, user, auth):
+        pass
+
     def __str__(self):
         return str(self.verbose_name)
 
@@ -108,9 +111,43 @@ class NfcUidMediaType(BaseMediaType):
                 return m
 
 
+class NfcMf0aesMediaType(BaseMediaType):
+    identifier = 'nfc_mf0aes'
+    verbose_name = 'NFC Mifare Ultralight AES'
+    medium_created_by_server = False
+    supports_giftcard = True
+    supports_orderposition = False
+
+    def handle_new(self, organizer, medium, user, auth):
+        from pretix.base.models import GiftCard
+
+        if organizer.settings.get(f'reusable_media_type_{self.identifier}_autocreate_giftcard', as_type=bool):
+            with transaction.atomic():
+                gc = GiftCard.objects.create(
+                    issuer=organizer,
+                    expires=organizer.default_gift_card_expiry,
+                    currency=organizer.settings.get(f'reusable_media_type_{self.identifier}_autocreate_giftcard_currency'),
+                )
+                medium.linked_giftcard = gc
+                medium.save()
+                medium.log_action(
+                    'pretix.reusable_medium.linked_giftcard.changed',
+                    user=user, auth=auth,
+                    data={
+                        'linked_giftcard': gc.pk
+                    }
+                )
+                gc.log_action(
+                    'pretix.giftcards.created',
+                    user=user, auth=auth,
+                )
+                return medium
+
+
 MEDIA_TYPES = {
     m.identifier: m for m in [
         BarcodePlainMediaType(),
         NfcUidMediaType(),
+        NfcMf0aesMediaType(),
     ]
 }

src/pretix/base/middleware.py

@@ -21,12 +21,12 @@
 #
 from collections import OrderedDict
 from urllib.parse import urlsplit
+from zoneinfo import ZoneInfo, ZoneInfoNotFoundError
 
-import pytz
 from django.conf import settings
 from django.http import Http404, HttpRequest, HttpResponse
 from django.middleware.common import CommonMiddleware
-from django.urls import get_script_prefix
+from django.urls import get_script_prefix, resolve
 from django.utils import timezone, translation
 from django.utils.cache import patch_vary_headers
 from django.utils.deprecation import MiddlewareMixin
@@ -98,9 +98,9 @@ class LocaleMiddleware(MiddlewareMixin):
             tzname = request.user.timezone
         if tzname:
             try:
-                timezone.activate(pytz.timezone(tzname))
+                timezone.activate(ZoneInfo(tzname))
                 request.timezone = tzname
-            except pytz.UnknownTimeZoneError:
+            except ZoneInfoNotFoundError:
                 pass
         else:
             timezone.deactivate()
@@ -230,6 +230,8 @@ class SecurityMiddleware(MiddlewareMixin):
     )
 
     def process_response(self, request, resp):
+        url = resolve(request.path_info)
+
         if settings.DEBUG and resp.status_code >= 400:
             # Don't use CSP on debug error page as it breaks of Django's fancy error
             # pages
@@ -249,20 +251,28 @@ class SecurityMiddleware(MiddlewareMixin):
 
         h = {
             'default-src': ["{static}"],
-            'script-src': ['{static}', 'https://checkout.stripe.com', 'https://js.stripe.com'],
+            'script-src': ['{static}'],
             'object-src': ["'none'"],
-            'frame-src': ['{static}', 'https://checkout.stripe.com', 'https://js.stripe.com'],
+            'frame-src': ['{static}'],
             'style-src': ["{static}", "{media}"],
-            'connect-src': ["{dynamic}", "{media}", "https://checkout.stripe.com"],
+            'connect-src': ["{dynamic}", "{media}"],
-            'img-src': ["{static}", "{media}", "data:", "https://*.stripe.com"] + img_src,
+            'img-src': ["{static}", "{media}", "data:"] + img_src,
             'font-src': ["{static}"],
             'media-src': ["{static}", "data:"],
             # form-action is not only used to match on form actions, but also on URLs
             # form-actions redirect to. In the context of e.g. payment providers or
-            # single-sign-on this can be nearly anything so we cannot really restrict
+            # single-sign-on this can be nearly anything, so we cannot really restrict
             # this. However, we'll restrict it to HTTPS.
             'form-action': ["{dynamic}", "https:"] + (['http:'] if settings.SITE_URL.startswith('http://') else []),
         }
+        # Only include pay.google.com for wallet detection purposes on the Payment selection page
+        if (
+                url.url_name == "event.order.pay.change" or
+                (url.url_name == "event.checkout" and url.kwargs['step'] == "payment")
+        ):
+            h['script-src'].append('https://pay.google.com')
+            h['frame-src'].append('https://pay.google.com')
+            h['connect-src'].append('https://google.com/pay')
         if settings.LOG_CSP:
             h['report-uri'] = ["/csp_report/"]
         if 'Content-Security-Policy' in resp:

src/pretix/base/migrations/0031_auto_20160816_0648_squashed_0048_auto_20161129_1330.py

@@ -2,6 +2,8 @@
 # Generated by Django 1.10.4 on 2017-02-03 14:21
 from __future__ import unicode_literals
 
+from zoneinfo import ZoneInfo
+
 import django.core.validators
 import django.db.migrations.operations.special
 import django.db.models.deletion
@@ -26,7 +28,7 @@ def forwards42(apps, schema_editor):
         for s in EventSetting.objects.filter(key='timezone').values('object_id', 'value')
         }
     for order in Order.objects.all():
-        tz = pytz.timezone(etz.get(order.event_id, 'UTC'))
+        tz = ZoneInfo(etz.get(order.event_id, 'UTC'))
         order.expires = order.expires.astimezone(tz).replace(hour=23, minute=59, second=59)
         order.save()
 

src/pretix/base/migrations/0042_order_expires.py

@@ -2,9 +2,9 @@
 # Generated by Django 1.10.2 on 2016-10-19 17:57
 from __future__ import unicode_literals
 
-import pytz
+from zoneinfo import ZoneInfo
+
 from django.db import migrations
-from django.utils import timezone
 
 
 def forwards(apps, schema_editor):
@@ -15,7 +15,7 @@ def forwards(apps, schema_editor):
         for s in EventSetting.objects.filter(key='timezone').values('object_id', 'value')
     }
     for order in Order.objects.all():
-        tz = pytz.timezone(etz.get(order.event_id, 'UTC'))
+        tz = ZoneInfo(etz.get(order.event_id, 'UTC'))
         order.expires = order.expires.astimezone(tz).replace(hour=23, minute=59, second=59)
         order.save()
 

src/pretix/base/migrations/0102_auto_20181017_0024.py

@@ -3,7 +3,6 @@
 
 from django.core.exceptions import ImproperlyConfigured
 from django.db import migrations, models
-from django_mysql.checks import mysql_connections
 
 
 def set_attendee_name_parts(apps, schema_editor):
@@ -24,40 +23,12 @@ def set_attendee_name_parts(apps, schema_editor):
         ia.save(update_fields=['name_parts'])
 
 
-def check_mysqlversion(apps, schema_editor):
-    errors = []
-    any_conn_works = False
-    conns = list(mysql_connections())
-    found = 'Unknown version'
-    for alias, conn in conns:
-        if hasattr(conn, 'mysql_is_mariadb') and conn.mysql_is_mariadb and hasattr(conn, 'mysql_version'):
-            if conn.mysql_version >= (10, 2, 7):
-                any_conn_works = True
-            else:
-                found = 'MariaDB ' + '.'.join(str(v) for v in conn.mysql_version)
-        elif hasattr(conn, 'mysql_version'):
-            if conn.mysql_version >= (5, 7):
-                any_conn_works = True
-            else:
-                found = 'MySQL ' + '.'.join(str(v) for v in conn.mysql_version)
-
-    if conns and not any_conn_works:
-        raise ImproperlyConfigured(
-            'As of pretix 2.2, you need MySQL 5.7+ or MariaDB 10.2.7+ to run pretix. However, we detected a '
-            'database connection to {}'.format(found)
-        )
-    return errors
-
-
 class Migration(migrations.Migration):
     dependencies = [
         ('pretixbase', '0101_auto_20181025_2255'),
     ]
 
     operations = [
-        migrations.RunPython(
-            check_mysqlversion, migrations.RunPython.noop
-        ),
         migrations.RenameField(
             model_name='cartposition',
             old_name='attendee_name',

src/pretix/base/migrations/0198_invoice_sent_to_customer.py

@@ -1,8 +1,7 @@
 # Generated by Django 3.2.4 on 2021-09-30 10:25
-from datetime import datetime
+from datetime import datetime, timezone
 
 from django.db import migrations, models
-from pytz import UTC
 
 
 class Migration(migrations.Migration):
@@ -15,7 +14,7 @@ class Migration(migrations.Migration):
         migrations.AddField(
             model_name='invoice',
             name='sent_to_customer',
-            field=models.DateTimeField(blank=True, null=True, default=UTC.localize(datetime(1970, 1, 1, 0, 0, 0, 0))),
+            field=models.DateTimeField(blank=True, null=True, default=datetime(1970, 1, 1, 0, 0, 0, 0, tzinfo=timezone.utc)),
             preserve_default=False,
         ),
     ]

src/pretix/base/migrations/0230_auto_20230208_0939.py

@@ -50,6 +50,6 @@ class Migration(migrations.Migration):
             ],
             options={
                 'unique_together': {('event', 'secret')},
-            } if 'mysql' not in settings.DATABASES['default']['ENGINE'] else {}
+            }
         ),
     ]

src/pretix/base/migrations/0242_auto_20230512_1008.py

@@ -0,0 +1,38 @@
+# Generated by Django 3.2.18 on 2023-05-12 10:08
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0241_itemmetaproperties_required_values'),
+    ]
+
+    operations = [
+        migrations.RenameField(
+            model_name='giftcardacceptance',
+            old_name='collector',
+            new_name='acceptor',
+        ),
+        migrations.AddField(
+            model_name='giftcardacceptance',
+            name='active',
+            field=models.BooleanField(default=True),
+        ),
+        migrations.AddField(
+            model_name='giftcardacceptance',
+            name='reusable_media',
+            field=models.BooleanField(default=False),
+        ),
+        migrations.AlterField(
+            model_name='giftcardacceptance',
+            name='issuer',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='gift_card_acceptor_acceptance', to='pretixbase.organizer'),
+        ),
+        migrations.AlterUniqueTogether(
+            name='giftcardacceptance',
+            unique_together={('issuer', 'acceptor')},
+        ),
+    ]

src/pretix/base/migrations/0243_device_os_name_and_os_version.py

@@ -0,0 +1,23 @@
+# Generated by Django 4.1.9 on 2023-06-26 10:59
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0242_auto_20230512_1008'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='device',
+            name='os_name',
+            field=models.CharField(max_length=190, null=True),
+        ),
+        migrations.AddField(
+            model_name='device',
+            name='os_version',
+            field=models.CharField(max_length=190, null=True),
+        ),
+    ]

src/pretix/base/migrations/0244_mediumkeyset.py

@@ -0,0 +1,35 @@
+# Generated by Django 3.2.18 on 2023-05-17 11:32
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0243_device_os_name_and_os_version'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='device',
+            name='rsa_pubkey',
+            field=models.TextField(null=True),
+        ),
+        migrations.CreateModel(
+            name='MediumKeySet',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False)),
+                ('public_id', models.BigIntegerField(unique=True)),
+                ('media_type', models.CharField(max_length=100)),
+                ('active', models.BooleanField(default=True)),
+                ('uid_key', models.BinaryField()),
+                ('diversification_key', models.BinaryField()),
+                ('organizer', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='medium_key_sets', to='pretixbase.organizer')),
+            ],
+        ),
+        migrations.AddConstraint(
+            model_name='mediumkeyset',
+            constraint=models.UniqueConstraint(condition=models.Q(('active', True)), fields=('organizer', 'media_type'), name='keyset_unique_active'),
+        ),
+    ]

src/pretix/base/migrations/0245_discount_benefit_products.py

@@ -0,0 +1,34 @@
+# Generated by Django 4.2.4 on 2023-08-28 12:30
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("pretixbase", "0244_mediumkeyset"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="discount",
+            name="benefit_apply_to_addons",
+            field=models.BooleanField(default=True),
+        ),
+        migrations.AddField(
+            model_name="discount",
+            name="benefit_ignore_voucher_discounted",
+            field=models.BooleanField(default=False),
+        ),
+        migrations.AddField(
+            model_name="discount",
+            name="benefit_limit_products",
+            field=models.ManyToManyField(
+                related_name="benefit_discounts", to="pretixbase.item"
+            ),
+        ),
+        migrations.AddField(
+            model_name="discount",
+            name="benefit_same_products",
+            field=models.BooleanField(default=True),
+        ),
+    ]

src/pretix/base/models/_transactions.py

@@ -97,7 +97,7 @@ def _transactions_mark_order_dirty(order_id, using=None):
     if getattr(dirty_transactions, 'order_ids', None) is None:
         dirty_transactions.order_ids = set()
 
-    if _check_for_dirty_orders not in [func for savepoint_id, func in conn.run_on_commit]:
+    if _check_for_dirty_orders not in [func for (savepoint_id, func, *__) in conn.run_on_commit]:
         transaction.on_commit(_check_for_dirty_orders, using)
         dirty_transactions.order_ids.clear()  # This is necessary to clean up after old threads with rollbacked transactions
 

src/pretix/base/models/customers.py

@@ -121,14 +121,23 @@ class Customer(LoggedModel):
         if self.email:
             self.email = self.email.lower()
         if 'update_fields' in kwargs and 'last_modified' not in kwargs['update_fields']:
-            kwargs['update_fields'] = list(kwargs['update_fields']) + ['last_modified']
+            kwargs['update_fields'] = {'last_modified'}.union(kwargs['update_fields'])
         if not self.identifier:
             self.assign_identifier()
+            if 'update_fields' in kwargs:
+                kwargs['update_fields'] = {'identifier'}.union(kwargs['update_fields'])
         if self.name_parts:
-            self.name_cached = self.name
+            name = self.name
+            if self.name_cached != name:
+                self.name_cached = name
+                if 'update_fields' in kwargs:
+                    kwargs['update_fields'] = {'name_cached'}.union(kwargs['update_fields'])
         else:
-            self.name_cached = ""
+            if self.name_cached != "" or self.name_parts != {}:
-            self.name_parts = {}
+                self.name_cached = ""
+                self.name_parts = {}
+                if 'update_fields' in kwargs:
+                    kwargs['update_fields'] = {'name_cached', 'name_parts'}.union(kwargs['update_fields'])
         super().save(**kwargs)
 
     def anonymize(self):

src/pretix/base/models/devices.py

@@ -98,6 +98,8 @@ class Gate(LoggedModel):
                 if not Gate.objects.filter(organizer=self.organizer, identifier=code).exists():
                     self.identifier = code
                     break
+            if 'update_fields' in kwargs:
+                kwargs['update_fields'] = {'identifier'}.union(kwargs['update_fields'])
         return super().save(*args, **kwargs)
 
 
@@ -141,6 +143,14 @@ class Device(LoggedModel):
         max_length=190,
         null=True, blank=True
     )
+    os_name = models.CharField(
+        max_length=190,
+        null=True, blank=True
+    )
+    os_version = models.CharField(
+        max_length=190,
+        null=True, blank=True
+    )
     software_brand = models.CharField(
         max_length=190,
         null=True, blank=True
@@ -156,6 +166,10 @@ class Device(LoggedModel):
         null=True,
         blank=False
     )
+    rsa_pubkey = models.TextField(
+        null=True,
+        blank=True,
+    )
     info = models.JSONField(
         null=True, blank=True,
     )
@@ -173,6 +187,8 @@ class Device(LoggedModel):
     def save(self, *args, **kwargs):
         if not self.device_id:
             self.device_id = (self.organizer.devices.aggregate(m=Max('device_id'))['m'] or 0) + 1
+            if 'update_fields' in kwargs:
+                kwargs['update_fields'] = {'device_id'}.union(kwargs['update_fields'])
         super().save(*args, **kwargs)
 
     def permission_set(self) -> set:

src/pretix/base/models/discount.py

@@ -99,7 +99,7 @@ class Discount(LoggedModel):
     )
     condition_apply_to_addons = models.BooleanField(
         default=True,
-        verbose_name=_("Apply to add-on products"),
+        verbose_name=_("Count add-on products"),
         help_text=_("Discounts never apply to bundled products"),
     )
     condition_ignore_voucher_discounted = models.BooleanField(
@@ -107,7 +107,7 @@ class Discount(LoggedModel):
         verbose_name=_("Ignore products discounted by a voucher"),
         help_text=_("If this option is checked, products that already received a discount through a voucher will not "
                     "be considered for this discount. However, products that use a voucher only to e.g. unlock a "
-                    "hidden product or gain access to sold-out quota will still receive the discount."),
+                    "hidden product or gain access to sold-out quota will still be considered."),
     )
     condition_min_count = models.PositiveIntegerField(
         verbose_name=_('Minimum number of matching products'),
@@ -120,6 +120,19 @@ class Discount(LoggedModel):
         default=Decimal('0.00'),
     )
 
+    benefit_same_products = models.BooleanField(
+        default=True,
+        verbose_name=_("Apply discount to same set of products"),
+        help_text=_("By default, the discount is applied across the same selection of products than the condition for "
+                    "the discount given above. If you want, you can however also select a different selection of "
+                    "products.")
+    )
+    benefit_limit_products = models.ManyToManyField(
+        'Item',
+        verbose_name=_("Apply discount to specific products"),
+        related_name='benefit_discounts',
+        blank=True
+    )
     benefit_discount_matching_percent = models.DecimalField(
         verbose_name=_('Percentual discount on matching products'),
         decimal_places=2,
@@ -139,6 +152,18 @@ class Discount(LoggedModel):
         blank=True,
         validators=[MinValueValidator(1)],
     )
+    benefit_apply_to_addons = models.BooleanField(
+        default=True,
+        verbose_name=_("Apply to add-on products"),
+        help_text=_("Discounts never apply to bundled products"),
+    )
+    benefit_ignore_voucher_discounted = models.BooleanField(
+        default=False,
+        verbose_name=_("Ignore products discounted by a voucher"),
+        help_text=_("If this option is checked, products that already received a discount through a voucher will not "
+                    "be discounted. However, products that use a voucher only to e.g. unlock a hidden product or gain "
+                    "access to sold-out quota will still receive the discount."),
+    )
 
     # more feature ideas:
     # - max_usages_per_order
@@ -187,6 +212,14 @@ class Discount(LoggedModel):
                   'on a minimum value.')
             )
 
+        if data.get('subevent_mode') == cls.SUBEVENT_MODE_DISTINCT and not data.get('benefit_same_products'):
+            raise ValidationError(
+                {'benefit_same_products': [
+                    _('You cannot apply the discount to a different set of products if the discount is only valid '
+                      'for bookings of different dates.')
+                ]}
+            )
+
     def allow_delete(self):
         return not self.orderposition_set.exists()
 
@@ -197,6 +230,7 @@ class Discount(LoggedModel):
             'condition_min_value': self.condition_min_value,
             'benefit_only_apply_to_cheapest_n_matches': self.benefit_only_apply_to_cheapest_n_matches,
             'subevent_mode': self.subevent_mode,
+            'benefit_same_products': self.benefit_same_products,
         })
 
     def is_available_by_time(self, now_dt=None) -> bool:
@@ -207,14 +241,14 @@ class Discount(LoggedModel):
             return False
         return True
 
-    def _apply_min_value(self, positions, idx_group, result):
+    def _apply_min_value(self, positions, condition_idx_group, benefit_idx_group, result):
-        if self.condition_min_value and sum(positions[idx][2] for idx in idx_group) < self.condition_min_value:
+        if self.condition_min_value and sum(positions[idx][2] for idx in condition_idx_group) < self.condition_min_value:
             return
 
         if self.condition_min_count or self.benefit_only_apply_to_cheapest_n_matches:
             raise ValueError('Validation invariant violated.')
 
-        for idx in idx_group:
+        for idx in benefit_idx_group:
             previous_price = positions[idx][2]
             new_price = round_decimal(
                 previous_price * (Decimal('100.00') - self.benefit_discount_matching_percent) / Decimal('100.00'),
@@ -222,8 +256,8 @@ class Discount(LoggedModel):
             )
             result[idx] = new_price
 
-    def _apply_min_count(self, positions, idx_group, result):
+    def _apply_min_count(self, positions, condition_idx_group, benefit_idx_group, result):
-        if len(idx_group) < self.condition_min_count:
+        if len(condition_idx_group) < self.condition_min_count:
             return
 
         if not self.condition_min_count or self.condition_min_value:
@@ -233,15 +267,17 @@ class Discount(LoggedModel):
             if not self.condition_min_count:
                 raise ValueError('Validation invariant violated.')
 
-            idx_group = sorted(idx_group, key=lambda idx: (positions[idx][2], -idx))  # sort by line_price
+            condition_idx_group = sorted(condition_idx_group, key=lambda idx: (positions[idx][2], -idx))  # sort by line_price
+            benefit_idx_group = sorted(benefit_idx_group, key=lambda idx: (positions[idx][2], -idx))  # sort by line_price
 
             # Prevent over-consuming of items, i.e. if our discount is "buy 2, get 1 free", we only
             # want to match multiples of 3
-            consume_idx = idx_group[:len(idx_group) // self.condition_min_count * self.condition_min_count]
+            n_groups = min(len(condition_idx_group) // self.condition_min_count, len(benefit_idx_group))
-            benefit_idx = idx_group[:len(idx_group) // self.condition_min_count * self.benefit_only_apply_to_cheapest_n_matches]
+            consume_idx = condition_idx_group[:n_groups * self.condition_min_count]
+            benefit_idx = benefit_idx_group[:n_groups * self.benefit_only_apply_to_cheapest_n_matches]
         else:
-            consume_idx = idx_group
+            consume_idx = condition_idx_group
-            benefit_idx = idx_group
+            benefit_idx = benefit_idx_group
 
         for idx in benefit_idx:
             previous_price = positions[idx][2]
@@ -276,7 +312,7 @@ class Discount(LoggedModel):
             limit_products = {p.pk for p in self.condition_limit_products.all()}
 
         # First, filter out everything not even covered by our product scope
-        initial_candidates = [
+        condition_candidates = [
             idx
             for idx, (item_id, subevent_id, line_price_gross, is_addon_to, voucher_discount) in positions.items()
             if (
@@ -286,11 +322,25 @@ class Discount(LoggedModel):
             )
         ]
 
+        if self.benefit_same_products:
+            benefit_candidates = list(condition_candidates)
+        else:
+            benefit_products = {p.pk for p in self.benefit_limit_products.all()}
+            benefit_candidates = [
+                idx
+                for idx, (item_id, subevent_id, line_price_gross, is_addon_to, voucher_discount) in positions.items()
+                if (
+                    item_id in benefit_products and
+                    (self.benefit_apply_to_addons or not is_addon_to) and
+                    (not self.benefit_ignore_voucher_discounted or voucher_discount is None or voucher_discount == Decimal('0.00'))
+                )
+            ]
+
         if self.subevent_mode == self.SUBEVENT_MODE_MIXED:  # also applies to non-series events
             if self.condition_min_count:
-                self._apply_min_count(positions, initial_candidates, result)
+                self._apply_min_count(positions, condition_candidates, benefit_candidates, result)
             else:
-                self._apply_min_value(positions, initial_candidates, result)
+                self._apply_min_value(positions, condition_candidates, benefit_candidates, result)
 
         elif self.subevent_mode == self.SUBEVENT_MODE_SAME:
             def key(idx):
@@ -299,17 +349,18 @@ class Discount(LoggedModel):
             # Build groups of candidates with the same subevent, then apply our regular algorithm
             # to each group
 
-            _groups = groupby(sorted(initial_candidates, key=key), key=key)
+            _groups = groupby(sorted(condition_candidates, key=key), key=key)
-            candidate_groups = [list(g) for k, g in _groups]
+            candidate_groups = [(k, list(g)) for k, g in _groups]
 
-            for g in candidate_groups:
+            for subevent_id, g in candidate_groups:
+                benefit_g = [idx for idx in benefit_candidates if positions[idx][1] == subevent_id]
                 if self.condition_min_count:
-                    self._apply_min_count(positions, g, result)
+                    self._apply_min_count(positions, g, benefit_g, result)
                 else:
-                    self._apply_min_value(positions, g, result)
+                    self._apply_min_value(positions, g, benefit_g, result)
 
         elif self.subevent_mode == self.SUBEVENT_MODE_DISTINCT:
-            if self.condition_min_value:
+            if self.condition_min_value or not self.benefit_same_products:
                 raise ValueError('Validation invariant violated.')
 
             # Build optimal groups of candidates with distinct subevents, then apply our regular algorithm
@@ -336,7 +387,7 @@ class Discount(LoggedModel):
                 candidates = []
                 cardinality = None
                 for se, l in subevent_to_idx.items():
-                    l = [ll for ll in l if ll in initial_candidates and ll not in current_group]
+                    l = [ll for ll in l if ll in condition_candidates and ll not in current_group]
                     if cardinality and len(l) != cardinality:
                         continue
                     if se not in {positions[idx][1] for idx in current_group}:
@@ -373,5 +424,5 @@ class Discount(LoggedModel):
                                 break
 
             for g in candidate_groups:
-                self._apply_min_count(positions, g, result)
+                self._apply_min_count(positions, g, g, result)
         return result

src/pretix/base/models/event.py

@@ -40,8 +40,9 @@ from collections import Counter, OrderedDict, defaultdict
 from datetime import datetime, time, timedelta
 from operator import attrgetter
 from urllib.parse import urljoin
+from zoneinfo import ZoneInfo
 
-import pytz
+import pytz_deprecation_shim
 from django.conf import settings
 from django.core.exceptions import ValidationError
 from django.core.files.storage import default_storage
@@ -214,7 +215,7 @@ class EventMixin:
 
     @property
     def timezone(self):
-        return pytz.timezone(self.settings.timezone)
+        return pytz_deprecation_shim.timezone(self.settings.timezone)
 
     @property
     def effective_presale_end(self):
@@ -773,7 +774,7 @@ class Event(EventMixin, LoggedModel):
         """
         The last datetime of payments for this event.
         """
-        tz = pytz.timezone(self.settings.timezone)
+        tz = ZoneInfo(self.settings.timezone)
         return make_aware(datetime.combine(
             self.settings.get('payment_term_last', as_type=RelativeDateWrapper).datetime(self).date(),
             time(hour=23, minute=59, second=59)
@@ -906,14 +907,18 @@ class Event(EventMixin, LoggedModel):
             self.items.filter(hidden_if_available_id=oldid).update(hidden_if_available=q)
 
         for d in Discount.objects.filter(event=other).prefetch_related('condition_limit_products'):
-            items = list(d.condition_limit_products.all())
+            c_items = list(d.condition_limit_products.all())
+            b_items = list(d.benefit_limit_products.all())
             d.pk = None
             d.event = self
             d.save(force_insert=True)
             d.log_action('pretix.object.cloned')
-            for i in items:
+            for i in c_items:
                 if i.pk in item_map:
                     d.condition_limit_products.add(item_map[i.pk])
+            for i in b_items:
+                if i.pk in item_map:
+                    d.benefit_limit_products.add(item_map[i.pk])
 
         question_map = {}
         for q in Question.objects.filter(event=other).prefetch_related('items', 'options'):
@@ -1276,6 +1281,9 @@ class Event(EventMixin, LoggedModel):
         return not self.orders.exists() and not self.invoices.exists()
 
     def delete_sub_objects(self):
+        from .checkin import Checkin
+
+        Checkin.all.filter(successful=False, list__event=self).delete()
         self.cartposition_set.filter(addon_to__isnull=False).delete()
         self.cartposition_set.all().delete()
         self.vouchers.all().delete()

src/pretix/base/models/exports.py

@@ -19,10 +19,11 @@
 # You should have received a copy of the GNU Affero General Public License along with this program.  If not, see
 # <https://www.gnu.org/licenses/>.
 #
+import zoneinfo
 from datetime import datetime, timedelta
 
-import pytz
 from dateutil.rrule import rrulestr
+from dateutil.tz import datetime_exists
 from django.conf import settings
 from django.core.serializers.json import DjangoJSONEncoder
 from django.db import models
@@ -108,12 +109,9 @@ class AbstractScheduledExport(LoggedModel):
             self.schedule_next_run = None
             return
 
-        try:
+        self.schedule_next_run = make_aware(datetime.combine(new_d.date(), self.schedule_rrule_time), tz)
-            self.schedule_next_run = make_aware(datetime.combine(new_d.date(), self.schedule_rrule_time), tz)
+        if not datetime_exists(self.schedule_next_run):
-        except pytz.exceptions.AmbiguousTimeError:
+            self.schedule_next_run += timedelta(hours=1)
-            self.schedule_next_run = make_aware(datetime.combine(new_d.date(), self.schedule_rrule_time), tz, is_dst=False)
-        except pytz.exceptions.NonExistentTimeError:
-            self.schedule_next_run = make_aware(datetime.combine(new_d.date(), self.schedule_rrule_time) + timedelta(hours=1), tz)
 
 
 class ScheduledEventExport(AbstractScheduledExport):
@@ -136,4 +134,4 @@ class ScheduledOrganizerExport(AbstractScheduledExport):
 
     @property
     def tz(self):
-        return pytz.timezone(self.timezone)
+        return zoneinfo.ZoneInfo(self.timezone)

src/pretix/base/models/giftcards.py

@@ -46,14 +46,19 @@ def gen_giftcard_secret(length=8):
 class GiftCardAcceptance(models.Model):
     issuer = models.ForeignKey(
         'Organizer',
-        related_name='gift_card_collector_acceptance',
+        related_name='gift_card_acceptor_acceptance',
         on_delete=models.CASCADE
     )
-    collector = models.ForeignKey(
+    acceptor = models.ForeignKey(
         'Organizer',
         related_name='gift_card_issuer_acceptance',
         on_delete=models.CASCADE
     )
+    active = models.BooleanField(default=True)
+    reusable_media = models.BooleanField(default=False)
+
+    class Meta:
+        unique_together = (('issuer', 'acceptor'),)
 
 
 class GiftCard(LoggedModel):
@@ -114,7 +119,7 @@ class GiftCard(LoggedModel):
         return self.transactions.aggregate(s=Sum('value'))['s'] or Decimal('0.00')
 
     def accepted_by(self, organizer):
-        return self.issuer == organizer or GiftCardAcceptance.objects.filter(issuer=self.issuer, collector=organizer).exists()
+        return self.issuer == organizer or GiftCardAcceptance.objects.filter(issuer=self.issuer, acceptor=organizer, active=True).exists()
 
     def save(self, *args, **kwargs):
         if not self.secret:

src/pretix/base/models/invoices.py

@@ -251,14 +251,20 @@ class Invoice(models.Model):
             raise ValueError('Every invoice needs to be connected to an order')
         if not self.event:
             self.event = self.order.event
+            if 'update_fields' in kwargs:
+                kwargs['update_fields'] = {'event'}.union(kwargs['update_fields'])
         if not self.organizer:
             self.organizer = self.order.event.organizer
+            if 'update_fields' in kwargs:
+                kwargs['update_fields'] = {'organizer'}.union(kwargs['update_fields'])
         if not self.prefix:
             self.prefix = self.event.settings.invoice_numbers_prefix or (self.event.slug.upper() + '-')
             if self.is_cancellation:
                 self.prefix = self.event.settings.invoice_numbers_prefix_cancellations or self.prefix
             if '%' in self.prefix:
                 self.prefix = self.date.strftime(self.prefix)
+            if 'update_fields' in kwargs:
+                kwargs['update_fields'] = {'prefix'}.union(kwargs['update_fields'])
 
         if not self.invoice_no:
             if self.order.testmode:
@@ -276,8 +282,13 @@ class Invoice(models.Model):
                     # Suppress duplicate key errors and try again
                     if i == 9:
                         raise
+            if 'update_fields' in kwargs:
+                kwargs['update_fields'] = {'invoice_no'}.union(kwargs['update_fields'])
 
-        self.full_invoice_no = self.prefix + self.invoice_no
+        if self.full_invoice_no != self.prefix + self.invoice_no:
+            self.full_invoice_no = self.prefix + self.invoice_no
+            if 'update_fields' in kwargs:
+                kwargs['update_fields'] = {'full_invoice_no'}.union(kwargs['update_fields'])
         return super().save(*args, **kwargs)
 
     def delete(self, *args, **kwargs):

src/pretix/base/models/items.py

@@ -40,9 +40,11 @@ from collections import Counter, OrderedDict
 from datetime import date, datetime, time, timedelta
 from decimal import Decimal, DecimalException
 from typing import Optional, Tuple
+from zoneinfo import ZoneInfo
 
 import dateutil.parser
-import pytz
+import django_redis
+from dateutil.tz import datetime_exists
 from django.conf import settings
 from django.core.exceptions import ValidationError
 from django.core.validators import (
@@ -56,7 +58,6 @@ from django.utils.functional import cached_property
 from django.utils.timezone import is_naive, make_aware, now
 from django.utils.translation import gettext_lazy as _, pgettext_lazy
 from django_countries.fields import Country
-from django_redis import get_redis_connection
 from django_scopes import ScopedManager
 from i18nfield.fields import I18nCharField, I18nTextField
 
@@ -927,22 +928,22 @@ class Item(LoggedModel):
                 )
                 if self.validity_dynamic_duration_days:
                     replace_date += timedelta(days=self.validity_dynamic_duration_days)
-                valid_until = tz.localize(valid_until.replace(
+                valid_until = valid_until.replace(
                     year=replace_date.year,
                     month=replace_date.month,
                     day=replace_date.day,
                     hour=23, minute=59, second=59, microsecond=0,
-                    tzinfo=None,
+                    tzinfo=tz,
-                ))
+                )
             elif self.validity_dynamic_duration_days:
                 replace_date = valid_until.date() + timedelta(days=self.validity_dynamic_duration_days - 1)
-                valid_until = tz.localize(valid_until.replace(
+                valid_until = valid_until.replace(
                     year=replace_date.year,
                     month=replace_date.month,
                     day=replace_date.day,
                     hour=23, minute=59, second=59, microsecond=0,
-                    tzinfo=None
+                    tzinfo=tz
-                ))
+                )
 
             if self.validity_dynamic_duration_hours:
                 valid_until += timedelta(hours=self.validity_dynamic_duration_hours)
@@ -950,6 +951,9 @@ class Item(LoggedModel):
             if self.validity_dynamic_duration_minutes:
                 valid_until += timedelta(minutes=self.validity_dynamic_duration_minutes)
 
+            if not datetime_exists(valid_until):
+                valid_until += timedelta(hours=1)
+
             return requested_start, valid_until
 
         else:
@@ -1589,6 +1593,8 @@ class Question(LoggedModel):
                 if not Question.objects.filter(event=self.event, identifier=code).exists():
                     self.identifier = code
                     break
+            if 'update_fields' in kwargs:
+                kwargs['update_fields'] = {'identifier'}.union(kwargs['update_fields'])
         super().save(*args, **kwargs)
         if self.event:
             self.event.cache.clear()
@@ -1678,7 +1684,7 @@ class Question(LoggedModel):
             try:
                 dt = dateutil.parser.parse(answer)
                 if is_naive(dt):
-                    dt = make_aware(dt, pytz.timezone(self.event.settings.timezone))
+                    dt = make_aware(dt, ZoneInfo(self.event.settings.timezone))
             except:
                 raise ValidationError(_('Invalid datetime input.'))
             else:
@@ -1736,6 +1742,8 @@ class QuestionOption(models.Model):
                 if not QuestionOption.objects.filter(question__event=self.question.event, identifier=code).exists():
                     self.identifier = code
                     break
+            if 'update_fields' in kwargs:
+                kwargs['update_fields'] = {'identifier'}.union(kwargs['update_fields'])
         super().save(*args, **kwargs)
 
     @staticmethod
@@ -1902,8 +1910,13 @@ class Quota(LoggedModel):
 
     def rebuild_cache(self, now_dt=None):
         if settings.HAS_REDIS:
-            rc = get_redis_connection("redis")
+            rc = django_redis.get_redis_connection("redis")
-            rc.hdel(f'quotas:{self.event_id}:availabilitycache', str(self.pk))
+            p = rc.pipeline()
+            p.hdel(f'quotas:{self.event_id}:availabilitycache', str(self.pk))
+            p.hdel(f'quotas:{self.event_id}:availabilitycache:nocw', str(self.pk))
+            p.hdel(f'quotas:{self.event_id}:availabilitycache:igcl', str(self.pk))
+            p.hdel(f'quotas:{self.event_id}:availabilitycache:nocw:igcl', str(self.pk))
+            p.execute()
             self.availability(now_dt=now_dt)
 
     def availability(

src/pretix/base/models/log.py

@@ -88,9 +88,7 @@ class LogEntry(models.Model):
 
     class Meta:
         ordering = ('-datetime', '-id')
-        index_together = [
+        indexes = [models.Index(fields=["datetime", "id"])]
-            ['datetime', 'id']
-        ]
 
     def display(self):
         from ..signals import logentry_display

src/pretix/base/models/media.py

@@ -121,5 +121,30 @@ class ReusableMedium(LoggedModel):
 
     class Meta:
         unique_together = (("identifier", "type", "organizer"),)
-        index_together = (("identifier", "type", "organizer"), ("updated", "id"))
+        indexes = [
+            models.Index(fields=("identifier", "type", "organizer")),
+            models.Index(fields=("updated", "id")),
+        ]
         ordering = "identifier", "type", "organizer"
+
+
+class MediumKeySet(models.Model):
+    organizer = models.ForeignKey('Organizer', on_delete=models.CASCADE, related_name='medium_key_sets')
+    public_id = models.BigIntegerField(
+        unique=True,
+    )
+    media_type = models.CharField(max_length=100)
+    active = models.BooleanField(default=True)
+    uid_key = models.BinaryField()
+    diversification_key = models.BinaryField()
+
+    objects = ScopedManager(organizer='organizer')
+
+    class Meta:
+        constraints = [
+            models.UniqueConstraint(
+                fields=["organizer", "media_type"],
+                condition=Q(active=True),
+                name="keyset_unique_active",
+            ),
+        ]

src/pretix/base/models/orders.py

@@ -42,10 +42,10 @@ from collections import Counter
 from datetime import datetime, time, timedelta
 from decimal import Decimal
 from typing import Any, Dict, List, Union
+from zoneinfo import ZoneInfo
 
 import dateutil
 import pycountry
-import pytz
 from django.conf import settings
 from django.core.exceptions import ValidationError
 from django.db import models, transaction
@@ -270,9 +270,9 @@ class Order(LockModel, LoggedModel):
         verbose_name = _("Order")
         verbose_name_plural = _("Orders")
         ordering = ("-datetime", "-pk")
-        index_together = [
+        indexes = [
-            ["datetime", "id"],
+            models.Index(fields=["datetime", "id"]),
-            ["last_modified", "id"],
+            models.Index(fields=["last_modified", "id"]),
         ]
 
     def __str__(self):
@@ -461,14 +461,20 @@ class Order(LockModel, LoggedModel):
         return '{event}-{code}'.format(event=self.event.slug.upper(), code=self.code)
 
     def save(self, **kwargs):
-        if 'update_fields' in kwargs and 'last_modified' not in kwargs['update_fields']:
+        if 'update_fields' in kwargs:
-            kwargs['update_fields'] = list(kwargs['update_fields']) + ['last_modified']
+            kwargs['update_fields'] = {'last_modified'}.union(kwargs['update_fields'])
         if not self.code:
             self.assign_code()
+            if 'update_fields' in kwargs:
+                kwargs['update_fields'] = {'code'}.union(kwargs['update_fields'])
         if not self.datetime:
             self.datetime = now()
+            if 'update_fields' in kwargs:
+                kwargs['update_fields'] = {'datetime'}.union(kwargs['update_fields'])
         if not self.expires:
             self.set_expires()
+            if 'update_fields' in kwargs:
+                kwargs['update_fields'] = {'expires'}.union(kwargs['update_fields'])
 
         is_new = not self.pk
         update_fields = kwargs.get('update_fields', [])
@@ -496,7 +502,7 @@ class Order(LockModel, LoggedModel):
 
     def set_expires(self, now_dt=None, subevents=None):
         now_dt = now_dt or now()
-        tz = pytz.timezone(self.event.settings.timezone)
+        tz = ZoneInfo(self.event.settings.timezone)
         mode = self.event.settings.get('payment_term_mode')
         if mode == 'days':
             exp_by_date = now_dt.astimezone(tz) + timedelta(days=self.event.settings.get('payment_term_days', as_type=int))
@@ -870,7 +876,7 @@ class Order(LockModel, LoggedModel):
 
     @property
     def payment_term_last(self):
-        tz = pytz.timezone(self.event.settings.timezone)
+        tz = ZoneInfo(self.event.settings.timezone)
         term_last = self.event.settings.get('payment_term_last', as_type=RelativeDateWrapper)
         if term_last:
             if self.event.has_subevents:
@@ -890,6 +896,33 @@ class Order(LockModel, LoggedModel):
             ), tz)
         return term_last
 
+    @property
+    def payment_term_expire_date(self):
+        delay = self.event.settings.get('payment_term_expire_delay_days', as_type=int)
+        if not delay:  # performance saver + backwards compatibility
+            return self.expires
+
+        term_last = self.payment_term_last
+        if term_last and self.expires > term_last:  # backwards compatibility
+            return self.expires
+
+        expires = self.expires.date() + timedelta(days=delay)
+        if self.event.settings.get('payment_term_weekdays'):
+            if expires.weekday() == 5:
+                expires += timedelta(days=2)
+            elif expires.weekday() == 6:
+                expires += timedelta(days=1)
+
+        tz = ZoneInfo(self.event.settings.timezone)
+        expires = make_aware(datetime.combine(
+            expires,
+            time(hour=23, minute=59, second=59)
+        ), tz)
+        if term_last:
+            return min(expires, term_last)
+        else:
+            return expires
+
     def _can_be_paid(self, count_waitinglist=True, ignore_date=False, force=False) -> Union[bool, str]:
         error_messages = {
             'late_lastdate': _("The payment can not be accepted as the last date of payments configured in the "
@@ -1230,7 +1263,7 @@ class QuestionAnswer(models.Model):
             try:
                 d = dateutil.parser.parse(self.answer)
                 if self.orderposition:
-                    tz = pytz.timezone(self.orderposition.order.event.settings.timezone)
+                    tz = ZoneInfo(self.orderposition.order.event.settings.timezone)
                     d = d.astimezone(tz)
                 return date_format(d, "SHORT_DATETIME_FORMAT")
             except ValueError:
@@ -1442,12 +1475,20 @@ class AbstractPosition(models.Model):
                 else self.variation.quotas.filter(subevent=self.subevent))
 
     def save(self, *args, **kwargs):
-        update_fields = kwargs.get('update_fields', [])
+        update_fields = kwargs.get('update_fields', set())
         if 'attendee_name_parts' in update_fields:
-            update_fields.append('attendee_name_cached')
+            kwargs['update_fields'] = {'attendee_name_cached'}.union(kwargs['update_fields'])
-        self.attendee_name_cached = self.attendee_name
+
+        name = self.attendee_name
+        if name != self.attendee_name_cached:
+            self.attendee_name_cached = name
+            if 'update_fields' in kwargs:
+                kwargs['update_fields'] = {'attendee_name_cached'}.union(kwargs['update_fields'])
+
         if self.attendee_name_parts is None:
             self.attendee_name_parts = {}
+            if 'update_fields' in kwargs:
+                kwargs['update_fields'] = {'attendee_name_parts'}.union(kwargs['update_fields'])
         super().save(*args, **kwargs)
 
     @property
@@ -1631,12 +1672,13 @@ class OrderPayment(models.Model):
         if status_change:
             self.order.create_transactions()
 
-    def fail(self, info=None, user=None, auth=None, log_data=None):
+    def fail(self, info=None, user=None, auth=None, log_data=None, send_mail=True):
         """
         Marks the order as failed and sets info to ``info``, but only if the order is in ``created`` or ``pending``
         state. This is equivalent to setting ``state`` to ``OrderPayment.PAYMENT_STATE_FAILED`` and logging a failure,
-        but it adds strong database logging since we do not want to report a failure for an order that has just
+        but it adds strong database locking since we do not want to report a failure for an order that has just
         been marked as paid.
+        :param send_mail: Whether an email should be sent to the user about this event (default: ``True``).
         """
         with transaction.atomic():
             locked_instance = OrderPayment.objects.select_for_update(of=OF_SELF).get(pk=self.pk)
@@ -1661,6 +1703,17 @@ class OrderPayment(models.Model):
             'info': info,
             'data': log_data,
         }, user=user, auth=auth)
+
+        if send_mail:
+            with language(self.order.locale, self.order.event.settings.region):
+                email_subject = self.order.event.settings.mail_subject_order_payment_failed
+                email_template = self.order.event.settings.mail_text_order_payment_failed
+                email_context = get_email_context(event=self.order.event, order=self.order)
+                self.order.send_mail(
+                    email_subject, email_template, email_context,
+                    'pretix.event.order.email.payment_failed', user=user, auth=auth,
+                )
+
         return True
 
     def confirm(self, count_waitinglist=True, send_mail=True, force=False, user=None, auth=None, mail_text='',
@@ -1827,6 +1880,8 @@ class OrderPayment(models.Model):
     def save(self, *args, **kwargs):
         if not self.local_id:
             self.local_id = (self.order.payments.aggregate(m=Max('local_id'))['m'] or 0) + 1
+            if 'update_fields' in kwargs:
+                kwargs['update_fields'] = {'local_id'}.union(kwargs['update_fields'])
         super().save(*args, **kwargs)
 
     def create_external_refund(self, amount=None, execution_date=None, info='{}'):
@@ -2025,6 +2080,8 @@ class OrderRefund(models.Model):
     def save(self, *args, **kwargs):
         if not self.local_id:
             self.local_id = (self.order.refunds.aggregate(m=Max('local_id'))['m'] or 0) + 1
+            if 'update_fields' in kwargs:
+                kwargs['update_fields'] = {'local_id'}.union(kwargs['update_fields'])
         super().save(*args, **kwargs)
 
 
@@ -2443,14 +2500,20 @@ class OrderPosition(AbstractPosition):
                 assign_ticket_secret(
                     event=self.order.event, position=self, force_invalidate=True, save=False
                 )
+                if 'update_fields' in kwargs:
+                    kwargs['update_fields'] = {'secret'}.union(kwargs['update_fields'])
 
-        if not self.blocked:
+        if not self.blocked and self.blocked is not None:
             self.blocked = None
-        elif not isinstance(self.blocked, list) or any(not isinstance(b, str) for b in self.blocked):
+            if 'update_fields' in kwargs:
+                kwargs['update_fields'] = {'blocked'}.union(kwargs['update_fields'])
+        elif self.blocked and (not isinstance(self.blocked, list) or any(not isinstance(b, str) for b in self.blocked)):
             raise TypeError("blocked needs to be a list of strings")
 
         if not self.pseudonymization_id:
             self.assign_pseudonymization_id()
+            if 'update_fields' in kwargs:
+                kwargs['update_fields'] = {'pseudonymization_id'}.union(kwargs['update_fields'])
 
         if not self.get_deferred_fields():
             if Transaction.key(self) != self.__initial_transaction_key or self.canceled != self.__initial_canceled or not self.pk:
@@ -2693,8 +2756,8 @@ class Transaction(models.Model):
 
     class Meta:
         ordering = 'datetime', 'pk'
-        index_together = [
+        indexes = [
-            ['datetime', 'id']
+            models.Index(fields=['datetime', 'id'])
         ]
 
     def save(self, *args, **kwargs):
@@ -2936,10 +2999,17 @@ class InvoiceAddress(models.Model):
             self.order.touch()
 
         if self.name_parts:
-            self.name_cached = self.name
+            name = self.name
+            if self.name_cached != name:
+                self.name_cached = self.name
+                if 'update_fields' in kwargs:
+                    kwargs['update_fields'] = {'name_cached'}.union(kwargs['update_fields'])
         else:
-            self.name_cached = ""
+            if self.name_cached != "" or self.name_parts != {}:
-            self.name_parts = {}
+                self.name_cached = ""
+                self.name_parts = {}
+                if 'update_fields' in kwargs:
+                    kwargs['update_fields'] = {'name_cached', 'name_parts'}.union(kwargs['update_fields'])
         super().save(**kwargs)
 
     def describe(self):
@@ -3085,11 +3155,7 @@ class BlockedTicketSecret(models.Model):
     updated = models.DateTimeField(auto_now=True)
 
     class Meta:
-        if 'mysql' not in settings.DATABASES['default']['ENGINE']:
+        unique_together = (('event', 'secret'),)
-            # MySQL does not support indexes on TextField(). Django knows this and just ignores db_index, but it will
-            # not silently ignore the UNIQUE index, causing this table to fail. I'm so glad we're deprecating MySQL
-            # in a few months, so we'll just live without an unique index until then.
-            unique_together = (('event', 'secret'),)
 
 
 @receiver(post_delete, sender=CachedTicket)

src/pretix/base/models/organizer.py

@@ -35,12 +35,12 @@
 import string
 from datetime import date, datetime, time
 
-import pytz
+import pytz_deprecation_shim
 from django.conf import settings
 from django.core.mail import get_connection
 from django.core.validators import MinLengthValidator, RegexValidator
 from django.db import models
-from django.db.models import Exists, OuterRef, Q
+from django.db.models import Q
 from django.urls import reverse
 from django.utils.crypto import get_random_string
 from django.utils.functional import cached_property
@@ -102,6 +102,7 @@ class Organizer(LoggedModel):
         is_new = not self.pk
         obj = super().save(*args, **kwargs)
         if is_new:
+            kwargs.pop('update_fields', None)  # does not make sense here
             self.set_defaults()
         else:
             self.get_cache().clear()
@@ -140,7 +141,7 @@ class Organizer(LoggedModel):
 
     @property
     def timezone(self):
-        return pytz.timezone(self.settings.timezone)
+        return pytz_deprecation_shim.timezone(self.settings.timezone)
 
     @cached_property
     def all_logentries_link(self):
@@ -156,17 +157,19 @@ class Organizer(LoggedModel):
         return self.cache.get_or_set(
             key='has_gift_cards',
             timeout=15,
-            default=lambda: self.issued_gift_cards.exists() or self.gift_card_issuer_acceptance.exists()
+            default=lambda: self.issued_gift_cards.exists() or self.gift_card_issuer_acceptance.filter(active=True).exists()
         )
 
     @property
     def accepted_gift_cards(self):
         from .giftcards import GiftCard, GiftCardAcceptance
 
-        return GiftCard.objects.annotate(
+        return GiftCard.objects.filter(
-            accepted=Exists(GiftCardAcceptance.objects.filter(issuer=OuterRef('issuer'), collector=self))
+            Q(issuer=self) |
-        ).filter(
+            Q(issuer__in=GiftCardAcceptance.objects.filter(
-            Q(issuer=self) | Q(accepted=True)
+                acceptor=self,
+                active=True,
+            ).values_list('issuer', flat=True))
         )
 
     @property

src/pretix/base/models/tax.py

@@ -22,9 +22,12 @@
 import json
 from decimal import Decimal
 
+import jsonschema
+from django.contrib.staticfiles import finders
 from django.core.exceptions import ValidationError
 from django.core.validators import MaxValueValidator, MinValueValidator
 from django.db import models
+from django.utils.deconstruct import deconstructible
 from django.utils.formats import localize
 from django.utils.translation import gettext_lazy as _, pgettext
 from i18nfield.fields import I18nCharField
@@ -135,6 +138,25 @@ def cc_to_vat_prefix(country_code):
     return country_code
 
 
+@deconstructible
+class CustomRulesValidator:
+    def __call__(self, value):
+        if not isinstance(value, dict):
+            try:
+                val = json.loads(value)
+            except ValueError:
+                raise ValidationError(_('Your layout file is not a valid JSON file.'))
+        else:
+            val = value
+        with open(finders.find('schema/tax-rules-custom.schema.json'), 'r') as f:
+            schema = json.loads(f.read())
+        try:
+            jsonschema.validate(val, schema)
+        except jsonschema.ValidationError as e:
+            e = str(e).replace('%', '%%')
+            raise ValidationError(_('Your set of rules is not valid. Error message: {}').format(e))
+
+
 class TaxRule(LoggedModel):
     event = models.ForeignKey('Event', related_name='tax_rules', on_delete=models.CASCADE)
     internal_name = models.CharField(
@@ -318,10 +340,17 @@ class TaxRule(LoggedModel):
         rules = self._custom_rules
         if invoice_address:
             for r in rules:
-                if r['country'] == 'EU' and not is_eu_country(invoice_address.country):
+                if r['country'] == 'ZZ':    # Rule: Any country
-                    continue
+                    pass
-                if r['country'] not in ('ZZ', 'EU') and r['country'] != str(invoice_address.country):
+                elif r['country'] == 'EU':  # Rule: Any EU country
-                    continue
+                    if not is_eu_country(invoice_address.country):
+                        continue
+                elif '-' in r['country']:   # Rule: Specific country and state
+                    if r['country'] != str(invoice_address.country) + '-' + str(invoice_address.state):
+                        continue
+                else:                       # Rule: Specific country
+                    if r['country'] != str(invoice_address.country):
+                        continue
                 if r['address_type'] == 'individual' and invoice_address.is_business:
                     continue
                 if r['address_type'] in ('business', 'business_vat_id') and not invoice_address.is_business:

src/pretix/base/models/vouchers.py

@@ -502,7 +502,10 @@ class Voucher(LoggedModel):
         return seat
 
     def save(self, *args, **kwargs):
-        self.code = self.code.upper()
+        if self.code != self.code.upper():
+            self.code = self.code.upper()
+            if 'update_fields' in kwargs:
+                kwargs['update_fields'] = {'code'}.union(kwargs['update_fields'])
         super().save(*args, **kwargs)
         self.event.cache.set('vouchers_exist', True)
 

src/pretix/base/models/waitinglist.py

@@ -126,12 +126,19 @@ class WaitingListEntry(LoggedModel):
             raise ValidationError('Invalid input')
 
     def save(self, *args, **kwargs):
-        update_fields = kwargs.get('update_fields', [])
+        update_fields = kwargs.get('update_fields', set())
         if 'name_parts' in update_fields:
-            update_fields.append('name_cached')
+            kwargs['update_fields'] = {'name_cached'}.union(kwargs['update_fields'])
-        self.name_cached = self.name
+        name = self.name
+        if name != self.name_cached:
+            self.name_cached = name
+            if 'update_fields' in kwargs:
+                kwargs['update_fields'] = {'name_cached'}.union(kwargs['update_fields'])
+
         if self.name_parts is None:
             self.name_parts = {}
+            if 'update_fields' in kwargs:
+                kwargs['update_fields'] = {'name_parts'}.union(kwargs['update_fields'])
         super().save(*args, **kwargs)
 
     @property
@@ -211,7 +218,7 @@ class WaitingListEntry(LoggedModel):
                 'waitinglistentry': self.pk,
                 'subevent': self.subevent.pk if self.subevent else None,
             }, user=user, auth=auth)
-            self.log_action('pretix.waitinglist.voucher', user=user, auth=auth)
+            self.log_action('pretix.event.orders.waitinglist.voucher_assigned', user=user, auth=auth)
             self.voucher = v
             self.save()
 

src/pretix/base/orderimport.py

@@ -28,6 +28,7 @@ import pycountry
 from django.conf import settings
 from django.core.exceptions import ValidationError
 from django.core.validators import EmailValidator
+from django.db.models import Q
 from django.utils import formats
 from django.utils.functional import cached_property
 from django.utils.translation import (
@@ -42,8 +43,8 @@ from phonenumbers import SUPPORTED_REGIONS
 from pretix.base.channels import get_all_sales_channels
 from pretix.base.forms.questions import guess_country
 from pretix.base.models import (
-    ItemVariation, OrderPosition, Question, QuestionAnswer, QuestionOption,
+    Customer, ItemVariation, OrderPosition, Question, QuestionAnswer,
-    Seat, SubEvent,
+    QuestionOption, Seat, SubEvent,
 )
 from pretix.base.services.pricing import get_price
 from pretix.base.settings import (
@@ -210,7 +211,7 @@ class SubeventColumn(ImportColumn):
         for format in input_formats:
             try:
                 d = datetime.datetime.strptime(value, format)
-                d = self.event.timezone.localize(d)
+                d = d.replace(tzinfo=self.event.timezone)
                 try:
                     se = self.event.subevents.get(
                         active=True,
@@ -660,7 +661,7 @@ class ValidFrom(ImportColumn):
         for format in input_formats:
             try:
                 d = datetime.datetime.strptime(value, format)
-                d = self.event.timezone.localize(d)
+                d = d.replace(tzinfo=self.event.timezone)
                 return d
             except (ValueError, TypeError):
                 pass
@@ -683,7 +684,7 @@ class ValidUntil(ImportColumn):
         for format in input_formats:
             try:
                 d = datetime.datetime.strptime(value, format)
-                d = self.event.timezone.localize(d)
+                d = d.replace(tzinfo=self.event.timezone)
                 return d
             except (ValueError, TypeError):
                 pass
@@ -804,7 +805,7 @@ class QuestionColumn(ImportColumn):
                 return self.q.clean_answer(value)
 
     def assign(self, value, order, position, invoice_address, **kwargs):
-        if value:
+        if value is not None:
             if not hasattr(order, '_answers'):
                 order._answers = []
             if isinstance(value, QuestionOption):
@@ -826,6 +827,28 @@ class QuestionColumn(ImportColumn):
                 a.options.add(*a._options)
 
 
+class CustomerColumn(ImportColumn):
+    identifier = 'customer'
+    verbose_name = gettext_lazy('Customer')
+
+    def clean(self, value, previous_values):
+        if value:
+            try:
+                value = self.event.organizer.customers.get(
+                    Q(identifier=value) | Q(email__iexact=value) | Q(external_identifier=value)
+                )
+            except Customer.MultipleObjectsReturned:
+                value = self.event.organizer.customers.get(
+                    Q(identifier=value)
+                )
+            except Customer.DoesNotExist:
+                raise ValidationError(_('No matching customer was found.'))
+        return value
+
+    def assign(self, value, order, position, invoice_address, **kwargs):
+        order.customer = value
+
+
 def get_all_columns(event):
     default = []
     if event.has_subevents:
@@ -837,6 +860,10 @@ def get_all_columns(event):
         Variation(event),
         InvoiceAddressCompany(event),
     ]
+    if event.settings.customer_accounts:
+        default += [
+            CustomerColumn(event),
+        ]
     scheme = PERSON_NAME_SCHEMES.get(event.settings.name_scheme)
     for n, l, w in scheme['fields']:
         default.append(InvoiceAddressNamePart(event, n, l))

src/pretix/base/payment.py

@@ -39,8 +39,8 @@ import logging
 from collections import OrderedDict
 from decimal import ROUND_HALF_UP, Decimal
 from typing import Any, Dict, Union
+from zoneinfo import ZoneInfo
 
-import pytz
 from django import forms
 from django.conf import settings
 from django.contrib import messages
@@ -60,7 +60,7 @@ from pretix.base.channels import get_all_sales_channels
 from pretix.base.forms import PlaceholderValidator
 from pretix.base.models import (
     CartPosition, Event, GiftCard, InvoiceAddress, Order, OrderPayment,
-    OrderRefund, Quota,
+    OrderRefund, Quota, TaxRule,
 )
 from pretix.base.reldate import RelativeDateField, RelativeDateWrapper
 from pretix.base.settings import SettingsSandbox
@@ -78,6 +78,16 @@ from pretix.presale.views.cart import cart_session, get_or_create_cart_id
 logger = logging.getLogger(__name__)
 
 
+class WalletQueries:
+    APPLEPAY = 'applepay'
+    GOOGLEPAY = 'googlepay'
+
+    WALLETS = (
+        (APPLEPAY, pgettext_lazy('payment', 'Apple Pay')),
+        (GOOGLEPAY, pgettext_lazy('payment', 'Google Pay')),
+    )
+
+
 class PaymentProviderForm(Form):
     def clean(self):
         cleaned_data = super().clean()
@@ -436,6 +446,19 @@ class BasePaymentProvider:
         d['_restrict_to_sales_channels']._as_type = list
         return d
 
+    @property
+    def walletqueries(self):
+        """
+        .. warning:: This property is considered **experimental**. It might change or get removed at any time without
+                     prior notice.
+
+        A list of wallet payment methods that should be dynamically joined to the public name of the payment method,
+        if they are available to the user.
+        The detection is made on a best effort basis with no guarantees of correctness and actual availability.
+        Wallets that pretix can check for are exposed through ``pretix.base.payment.WalletQueries``.
+        """
+        return []
+
     def settings_form_clean(self, cleaned_data):
         """
         Overriding this method allows you to inject custom validation into the settings form.
@@ -518,7 +541,7 @@ class BasePaymentProvider:
 
     def _is_still_available(self, now_dt=None, cart_id=None, order=None):
         now_dt = now_dt or now()
-        tz = pytz.timezone(self.event.settings.timezone)
+        tz = ZoneInfo(self.event.settings.timezone)
 
         availability_date = self.settings.get('_availability_date', as_type=RelativeDateWrapper)
         if availability_date:
@@ -1015,7 +1038,11 @@ class FreeOrderProvider(BasePaymentProvider):
 
         cart = get_cart(request)
         total = get_cart_total(request)
-        total += sum([f.value for f in get_fees(self.event, request, total, None, None, cart)])
+        try:
+            total += sum([f.value for f in get_fees(self.event, request, total, None, None, cart)])
+        except TaxRule.SaleNotAllowed:
+            # ignore for now, will fail on order creation
+            pass
         return total == 0
 
     def order_change_allowed(self, order: Order) -> bool:

src/pretix/base/pdf.py

@@ -43,16 +43,18 @@ import subprocess
 import tempfile
 import unicodedata
 import uuid
-from collections import OrderedDict
+from collections import OrderedDict, defaultdict
 from functools import partial
 from io import BytesIO
 
 import jsonschema
+import reportlab.rl_config
 from bidi.algorithm import get_display
 from django.conf import settings
 from django.contrib.staticfiles import finders
 from django.core.exceptions import ValidationError
 from django.db.models import Max, Min
+from django.db.models.fields.files import FieldFile
 from django.dispatch import receiver
 from django.utils.deconstruct import deconstructible
 from django.utils.formats import date_format
@@ -60,8 +62,8 @@ from django.utils.html import conditional_escape
 from django.utils.timezone import now
 from django.utils.translation import gettext_lazy as _, pgettext
 from i18nfield.strings import LazyI18nString
-from pypdf import PdfReader
+from pypdf import PdfReader, PdfWriter, Transformation
-from pytz import timezone
+from pypdf.generic import RectangleObject
 from reportlab.graphics import renderPDF
 from reportlab.graphics.barcode.qr import QrCodeWidget
 from reportlab.graphics.shapes import Drawing
@@ -86,6 +88,9 @@ from pretix.presale.style import get_fonts
 
 logger = logging.getLogger(__name__)
 
+if not settings.DEBUG:
+    reportlab.rl_config.shapeChecking = 0
+
 
 DEFAULT_VARIABLES = OrderedDict((
     ("secret", {
@@ -103,7 +108,10 @@ DEFAULT_VARIABLES = OrderedDict((
     ("positionid", {
         "label": _("Order position number"),
         "editor_sample": "1",
-        "evaluate": lambda orderposition, order, event: str(orderposition.positionid)
+        "evaluate": lambda orderposition, order, event: str(orderposition.positionid),
+        # There is no performance gain in using evaluate_bulk here, but we want to make sure it is used somewhere
+        # in core to make sure we notice if the implementation of the API breaks.
+        "evaluate_bulk": lambda orderpositions: [str(p.positionid) for p in orderpositions],
     }),
     ("order_positionid", {
         "label": _("Order code and position number"),
@@ -237,7 +245,7 @@ DEFAULT_VARIABLES = OrderedDict((
         "label": _("Event begin date and time"),
         "editor_sample": _("2017-05-31 20:00"),
         "evaluate": lambda op, order, ev: date_format(
-            ev.date_from.astimezone(timezone(ev.settings.timezone)),
+            ev.date_from.astimezone(ev.timezone),
             "SHORT_DATETIME_FORMAT"
         ) if ev.date_from else ""
     }),
@@ -245,7 +253,7 @@ DEFAULT_VARIABLES = OrderedDict((
         "label": _("Event begin date"),
         "editor_sample": _("2017-05-31"),
         "evaluate": lambda op, order, ev: date_format(
-            ev.date_from.astimezone(timezone(ev.settings.timezone)),
+            ev.date_from.astimezone(ev.timezone),
             "SHORT_DATE_FORMAT"
         ) if ev.date_from else ""
     }),
@@ -263,7 +271,7 @@ DEFAULT_VARIABLES = OrderedDict((
         "label": _("Event end date and time"),
         "editor_sample": _("2017-05-31 22:00"),
         "evaluate": lambda op, order, ev: date_format(
-            ev.date_to.astimezone(timezone(ev.settings.timezone)),
+            ev.date_to.astimezone(ev.timezone),
             "SHORT_DATETIME_FORMAT"
         ) if ev.date_to else ""
     }),
@@ -271,7 +279,7 @@ DEFAULT_VARIABLES = OrderedDict((
         "label": _("Event end date"),
         "editor_sample": _("2017-05-31"),
         "evaluate": lambda op, order, ev: date_format(
-            ev.date_to.astimezone(timezone(ev.settings.timezone)),
+            ev.date_to.astimezone(ev.timezone),
             "SHORT_DATE_FORMAT"
         ) if ev.date_to else ""
     }),
@@ -279,7 +287,7 @@ DEFAULT_VARIABLES = OrderedDict((
         "label": _("Event end time"),
         "editor_sample": _("22:00"),
         "evaluate": lambda op, order, ev: date_format(
-            ev.date_to.astimezone(timezone(ev.settings.timezone)),
+            ev.date_to.astimezone(ev.timezone),
             "TIME_FORMAT"
         ) if ev.date_to else ""
     }),
@@ -292,7 +300,7 @@ DEFAULT_VARIABLES = OrderedDict((
         "label": _("Event admission date and time"),
         "editor_sample": _("2017-05-31 19:00"),
         "evaluate": lambda op, order, ev: date_format(
-            ev.date_admission.astimezone(timezone(ev.settings.timezone)),
+            ev.date_admission.astimezone(ev.timezone),
             "SHORT_DATETIME_FORMAT"
         ) if ev.date_admission else ""
     }),
@@ -300,7 +308,7 @@ DEFAULT_VARIABLES = OrderedDict((
         "label": _("Event admission time"),
         "editor_sample": _("19:00"),
         "evaluate": lambda op, order, ev: date_format(
-            ev.date_admission.astimezone(timezone(ev.settings.timezone)),
+            ev.date_admission.astimezone(ev.timezone),
             "TIME_FORMAT"
         ) if ev.date_admission else ""
     }),
@@ -356,14 +364,9 @@ DEFAULT_VARIABLES = OrderedDict((
     }),
     ("addons", {
         "label": _("List of Add-Ons"),
-        "editor_sample": _("Add-on 1\nAdd-on 2"),
+        "editor_sample": _("Add-on 1\n2x Add-on 2"),
         "evaluate": lambda op, order, ev: "\n".join([
-            '{} - {}'.format(p.item.name, p.variation.value) if p.variation else str(p.item.name)
+            str(p) for p in generate_compressed_addon_list(op, order, ev)
-            for p in (
-                op.addons.all() if 'addons' in getattr(op, '_prefetched_objects_cache', {})
-                else op.addons.select_related('item', 'variation')
-            )
-            if not p.canceled
         ])
     }),
     ("organizer", {
@@ -385,7 +388,7 @@ DEFAULT_VARIABLES = OrderedDict((
         "label": _("Printing date"),
         "editor_sample": _("2017-05-31"),
         "evaluate": lambda op, order, ev: date_format(
-            now().astimezone(timezone(ev.settings.timezone)),
+            now().astimezone(ev.timezone),
             "SHORT_DATE_FORMAT"
         )
     }),
@@ -393,7 +396,7 @@ DEFAULT_VARIABLES = OrderedDict((
         "label": _("Printing date and time"),
         "editor_sample": _("2017-05-31 19:00"),
         "evaluate": lambda op, order, ev: date_format(
-            now().astimezone(timezone(ev.settings.timezone)),
+            now().astimezone(ev.timezone),
             "SHORT_DATETIME_FORMAT"
         )
     }),
@@ -401,7 +404,7 @@ DEFAULT_VARIABLES = OrderedDict((
         "label": _("Printing time"),
         "editor_sample": _("19:00"),
         "evaluate": lambda op, order, ev: date_format(
-            now().astimezone(timezone(ev.settings.timezone)),
+            now().astimezone(ev.timezone),
             "TIME_FORMAT"
         )
     }),
@@ -409,7 +412,7 @@ DEFAULT_VARIABLES = OrderedDict((
         "label": _("Validity start date"),
         "editor_sample": _("2017-05-31"),
         "evaluate": lambda op, order, ev: date_format(
-            op.valid_from.astimezone(timezone(ev.settings.timezone)),
+            op.valid_from.astimezone(ev.timezone),
             "SHORT_DATE_FORMAT"
         ) if op.valid_from else ""
     }),
@@ -417,7 +420,7 @@ DEFAULT_VARIABLES = OrderedDict((
         "label": _("Validity start date and time"),
         "editor_sample": _("2017-05-31 19:00"),
         "evaluate": lambda op, order, ev: date_format(
-            op.valid_from.astimezone(timezone(ev.settings.timezone)),
+            op.valid_from.astimezone(ev.timezone),
             "SHORT_DATETIME_FORMAT"
         ) if op.valid_from else ""
     }),
@@ -425,7 +428,7 @@ DEFAULT_VARIABLES = OrderedDict((
         "label": _("Validity start time"),
         "editor_sample": _("19:00"),
         "evaluate": lambda op, order, ev: date_format(
-            op.valid_from.astimezone(timezone(ev.settings.timezone)),
+            op.valid_from.astimezone(ev.timezone),
             "TIME_FORMAT"
         ) if op.valid_from else ""
     }),
@@ -433,7 +436,7 @@ DEFAULT_VARIABLES = OrderedDict((
         "label": _("Validity end date"),
         "editor_sample": _("2017-05-31"),
         "evaluate": lambda op, order, ev: date_format(
-            op.valid_until.astimezone(timezone(ev.settings.timezone)),
+            op.valid_until.astimezone(ev.timezone),
             "SHORT_DATE_FORMAT"
         ) if op.valid_until else ""
     }),
@@ -441,7 +444,7 @@ DEFAULT_VARIABLES = OrderedDict((
         "label": _("Validity end date and time"),
         "editor_sample": _("2017-05-31 19:00"),
         "evaluate": lambda op, order, ev: date_format(
-            op.valid_until.astimezone(timezone(ev.settings.timezone)),
+            op.valid_until.astimezone(ev.timezone),
             "SHORT_DATETIME_FORMAT"
         ) if op.valid_until else ""
     }),
@@ -449,7 +452,7 @@ DEFAULT_VARIABLES = OrderedDict((
         "label": _("Validity end time"),
         "editor_sample": _("19:00"),
         "evaluate": lambda op, order, ev: date_format(
-            op.valid_until.astimezone(timezone(ev.settings.timezone)),
+            op.valid_until.astimezone(ev.timezone),
             "TIME_FORMAT"
         ) if op.valid_until else ""
     }),
@@ -697,6 +700,30 @@ def get_seat(op: OrderPosition):
     return None
 
 
+def generate_compressed_addon_list(op, order, event):
+    itemcount = defaultdict(int)
+    addons = [p for p in (
+        op.addons.all() if 'addons' in getattr(op, '_prefetched_objects_cache', {})
+        else op.addons.select_related('item', 'variation')
+    ) if not p.canceled]
+    for pos in addons:
+        itemcount[pos.item, pos.variation] += 1
+
+    addonlist = []
+    for (item, variation), count in itemcount.items():
+        if variation:
+            if count > 1:
+                addonlist.append('{}x {} - {}'.format(count, item.name, variation.value))
+            else:
+                addonlist.append('{} - {}'.format(item.name, variation.value))
+        else:
+            if count > 1:
+                addonlist.append('{}x {}'.format(count, item.name))
+            else:
+                addonlist.append(item.name)
+    return addonlist
+
+
 class Renderer:
 
     def __init__(self, event, layout, background_file):
@@ -861,22 +888,37 @@ class Renderer:
                 image_file = None
 
         if image_file:
-            ir = ThumbnailingImageReader(image_file)
             try:
+                ir = ThumbnailingImageReader(image_file)
                 ir.resize(float(o['width']) * mm, float(o['height']) * mm, 300)
+                canvas.drawImage(
+                    image=ir,
+                    x=float(o['left']) * mm,
+                    y=float(o['bottom']) * mm,
+                    width=float(o['width']) * mm,
+                    height=float(o['height']) * mm,
+                    preserveAspectRatio=True,
+                    anchor='c',  # centered in frame
+                    mask='auto'
+                )
+                if isinstance(image_file, FieldFile):
+                    # ThumbnailingImageReader "closes" the file, so it's no use to use the same file pointer
+                    # in case we need it again. For FieldFile, fortunately, there is an easy way to make the file
+                    # refresh itself when it is used next.
+                    del image_file.file
             except:
-                logger.exception("Can not resize image")
+                logger.exception("Can not load or resize image")
-                pass
+                canvas.saveState()
-            canvas.drawImage(
+                canvas.setFillColorRGB(.8, .8, .8, alpha=1)
-                image=ir,
+                canvas.rect(
-                x=float(o['left']) * mm,
+                    x=float(o['left']) * mm,
-                y=float(o['bottom']) * mm,
+                    y=float(o['bottom']) * mm,
-                width=float(o['width']) * mm,
+                    width=float(o['width']) * mm,
-                height=float(o['height']) * mm,
+                    height=float(o['height']) * mm,
-                preserveAspectRatio=True,
+                    stroke=0,
-                anchor='c',  # centered in frame
+                    fill=1,
-                mask='auto'
+                )
-            )
+                canvas.restoreState()
         else:
             canvas.saveState()
             canvas.setFillColorRGB(.8, .8, .8, alpha=1)
@@ -930,7 +972,7 @@ class Renderer:
 
         # reportlab does not support unicode combination characters
         # It's important we do this before we use ArabicReshaper
-        text = unicodedata.normalize("NFKC", text)
+        text = unicodedata.normalize("NFC", text)
 
         # reportlab does not support RTL, ligature-heavy scripts like Arabic. Therefore, we use ArabicReshaper
         # to resolve all ligatures and python-bidi to switch RTL texts.
@@ -983,7 +1025,10 @@ class Renderer:
                 elif o['type'] == "poweredby":
                     self._draw_poweredby(canvas, op, o)
                 if self.bg_pdf:
-                    page_size = (self.bg_pdf.pages[0].mediabox[2], self.bg_pdf.pages[0].mediabox[3])
+                    page_size = (
+                        self.bg_pdf.pages[0].mediabox[2] - self.bg_pdf.pages[0].mediabox[0],
+                        self.bg_pdf.pages[0].mediabox[3] - self.bg_pdf.pages[0].mediabox[1]
+                    )
                     if self.bg_pdf.pages[0].get('/Rotate') in (90, 270):
                         # swap dimensions due to pdf being rotated
                         page_size = page_size[::-1]
@@ -1011,14 +1056,12 @@ class Renderer:
                 with open(os.path.join(d, 'out.pdf'), 'rb') as f:
                     return BytesIO(f.read())
         else:
-            from pypdf import PdfReader, PdfWriter, Transformation
-            from pypdf.generic import RectangleObject
             buffer.seek(0)
             new_pdf = PdfReader(buffer)
             output = PdfWriter()
 
             for i, page in enumerate(new_pdf.pages):
-                bg_page = copy.copy(self.bg_pdf.pages[i])
+                bg_page = copy.deepcopy(self.bg_pdf.pages[i])
                 bg_rotation = bg_page.get('/Rotate')
                 if bg_rotation:
                     # /Rotate is clockwise, transformation.rotate is counter-clockwise
@@ -1055,6 +1098,56 @@ class Renderer:
             return outbuffer
 
 
+def merge_background(fg_pdf, bg_pdf, out_file, compress):
+    if settings.PDFTK:
+        with tempfile.TemporaryDirectory() as d:
+            fg_filename = os.path.join(d, 'fg.pdf')
+            bg_filename = os.path.join(d, 'bg.pdf')
+            fg_pdf.write(fg_filename)
+            bg_pdf.write(bg_filename)
+            pdftk_cmd = [
+                settings.PDFTK,
+                fg_filename,
+                'multibackground',
+                bg_filename,
+                'output',
+                '-',
+            ]
+            if compress:
+                pdftk_cmd.append('compress')
+            subprocess.run(pdftk_cmd, check=True, stdout=out_file)
+    else:
+        output = PdfWriter()
+        for i, page in enumerate(fg_pdf.pages):
+            bg_page = copy.deepcopy(bg_pdf.pages[i])
+            bg_rotation = bg_page.get('/Rotate')
+            if bg_rotation:
+                # /Rotate is clockwise, transformation.rotate is counter-clockwise
+                t = Transformation().rotate(bg_rotation)
+                w = float(page.mediabox.getWidth())
+                h = float(page.mediabox.getHeight())
+                if bg_rotation in (90, 270):
+                    # offset due to rotation base
+                    if bg_rotation == 90:
+                        t = t.translate(h, 0)
+                    else:
+                        t = t.translate(0, w)
+                    # rotate mediabox as well
+                    page.mediabox = RectangleObject((
+                        page.mediabox.left.as_numeric(),
+                        page.mediabox.bottom.as_numeric(),
+                        page.mediabox.top.as_numeric(),
+                        page.mediabox.right.as_numeric(),
+                    ))
+                    page.trimbox = page.mediabox
+                elif bg_rotation == 180:
+                    t = t.translate(w, h)
+                page.add_transformation(t)
+            bg_page.merge_page(page)
+            output.add_page(bg_page)
+        output.write(out_file)
+
+
 @deconstructible
 class PdfLayoutValidator:
     def __call__(self, value):

src/pretix/base/reldate.py

@@ -22,8 +22,8 @@
 import datetime
 from collections import namedtuple
 from typing import Union
+from zoneinfo import ZoneInfo
 
-import pytz
 from dateutil import parser
 from django import forms
 from django.core.exceptions import ValidationError
@@ -67,7 +67,7 @@ class RelativeDateWrapper:
             if self.data.minutes_before is not None:
                 raise ValueError('A minute-based relative datetime can not be used as a date')
 
-            tz = pytz.timezone(event.settings.timezone)
+            tz = ZoneInfo(event.settings.timezone)
             if isinstance(event, SubEvent):
                 base_date = (
                     getattr(event, self.data.base_date_name)
@@ -86,7 +86,7 @@ class RelativeDateWrapper:
         if isinstance(self.data, (datetime.datetime, datetime.date)):
             return self.data
         else:
-            tz = pytz.timezone(event.settings.timezone)
+            tz = ZoneInfo(event.settings.timezone)
             if isinstance(event, SubEvent):
                 base_date = (
                     getattr(event, self.data.base_date_name)
@@ -99,8 +99,7 @@ class RelativeDateWrapper:
             if self.data.minutes_before is not None:
                 return base_date.astimezone(tz) - datetime.timedelta(minutes=self.data.minutes_before)
             else:
-                oldoffset = base_date.astimezone(tz).utcoffset()
+                new_date = (base_date.astimezone(tz) - datetime.timedelta(days=self.data.days_before)).astimezone(tz)
-                new_date = base_date.astimezone(tz) - datetime.timedelta(days=self.data.days_before)
                 if self.data.time:
                     new_date = new_date.replace(
                         hour=self.data.time.hour,
@@ -108,8 +107,6 @@ class RelativeDateWrapper:
                         second=self.data.time.second
                     )
                 new_date = new_date.astimezone(tz)
-                new_offset = new_date.utcoffset()
-                new_date += oldoffset - new_offset
                 return new_date
 
     def to_string(self) -> str:

src/pretix/base/services/cart.py

@@ -141,9 +141,10 @@ error_messages = {
     'price_not_a_number': gettext_lazy('The entered price is not a number.'),
     'price_too_high': gettext_lazy('The entered price is to high.'),
     'voucher_invalid': gettext_lazy('This voucher code is not known in our database.'),
-    'voucher_min_usages': gettext_lazy(
+    'voucher_min_usages': ngettext_lazy(
-        'The voucher code "%(voucher)s" can only be used if you select at least %(number)s '
+        'The voucher code "%(voucher)s" can only be used if you select at least %(number)s matching products.',
-        'matching products.'
+        'The voucher code "%(voucher)s" can only be used if you select at least %(number)s matching products.',
+        'number'
     ),
     'voucher_min_usages_removed': ngettext_lazy(
         'The voucher code "%(voucher)s" can only be used if you select at least %(number)s matching products. '
@@ -317,6 +318,9 @@ class CartManager:
     def _delete_out_of_timeframe(self):
         err = None
         for cp in self.positions:
+            if not cp.pk:
+                continue
+
             if cp.subevent and cp.subevent.presale_start and self.now_dt < cp.subevent.presale_start:
                 err = error_messages['some_subevent_not_started']
                 cp.addons.all().delete()
@@ -1074,6 +1078,7 @@ class CartManager:
         quotas_ok = _get_quota_availability(self._quota_diff, self.now_dt)
         err = None
         new_cart_positions = []
+        deleted_positions = set()
 
         err = err or self._check_min_max_per_product()
 
@@ -1085,7 +1090,10 @@ class CartManager:
                 if op.position.expires > self.now_dt:
                     for q in op.position.quotas:
                         quotas_ok[q] += 1
-                op.position.addons.all().delete()
+                addons = op.position.addons.all()
+                deleted_positions |= {a.pk for a in addons}
+                addons.delete()
+                deleted_positions.add(op.position.pk)
                 op.position.delete()
 
             elif isinstance(op, (self.AddOperation, self.ExtendOperation)):
@@ -1235,20 +1243,28 @@ class CartManager:
                     if op.seat and not op.seat.is_available(ignore_cart=op.position, sales_channel=self._sales_channel,
                                                             ignore_voucher_id=op.position.voucher_id):
                         err = err or error_messages['seat_unavailable']
-                        op.position.addons.all().delete()
+
+                        addons = op.position.addons.all()
+                        deleted_positions |= {a.pk for a in addons}
+                        deleted_positions.add(op.position.pk)
+                        addons.delete()
                         op.position.delete()
                     elif available_count == 1:
                         op.position.expires = self._expiry
                         op.position.listed_price = op.listed_price
                         op.position.price_after_voucher = op.price_after_voucher
                         # op.position.price will be updated by recompute_final_prices_and_taxes()
-                        try:
+                        if op.position.pk not in deleted_positions:
-                            op.position.save(force_update=True, update_fields=['expires', 'listed_price', 'price_after_voucher'])
+                            try:
-                        except DatabaseError:
+                                op.position.save(force_update=True, update_fields=['expires', 'listed_price', 'price_after_voucher'])
-                            # Best effort... The position might have been deleted in the meantime!
+                            except DatabaseError:
-                            pass
+                                # Best effort... The position might have been deleted in the meantime!
+                                pass
                     elif available_count == 0:
-                        op.position.addons.all().delete()
+                        addons = op.position.addons.all()
+                        deleted_positions |= {a.pk for a in addons}
+                        deleted_positions.add(op.position.pk)
+                        addons.delete()
                         op.position.delete()
                     else:
                         raise AssertionError("ExtendOperation cannot affect more than one item")

src/pretix/base/services/checkin.py

@@ -32,12 +32,12 @@
 # distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 # License for the specific language governing permissions and limitations under the License.
 import os
-from datetime import datetime, timedelta
+from datetime import datetime, timedelta, timezone
 from functools import partial, reduce
 
 import dateutil
 import dateutil.parser
-import pytz
+from dateutil.tz import datetime_exists
 from django.core.files import File
 from django.db import IntegrityError, transaction
 from django.db.models import (
@@ -53,7 +53,8 @@ from django.utils.translation import gettext as _
 from django_scopes import scope, scopes_disabled
 
 from pretix.base.models import (
-    Checkin, CheckinList, Device, Order, OrderPosition, QuestionOption,
+    Checkin, CheckinList, Device, Event, ItemVariation, Order, OrderPosition,
+    QuestionOption,
 )
 from pretix.base.signals import checkin_created, order_placed, periodic_task
 from pretix.helpers import OF_SELF
@@ -65,12 +66,13 @@ from pretix.helpers.jsonlogic_query import (
 )
 
 
-def _build_time(t=None, value=None, ev=None):
+def _build_time(t=None, value=None, ev=None, now_dt=None):
+    now_dt = now_dt or now()
     if t == "custom":
         return dateutil.parser.parse(value)
     elif t == "customtime":
         parsed = dateutil.parser.parse(value)
-        return now().astimezone(ev.timezone).replace(
+        return now_dt.astimezone(ev.timezone).replace(
             hour=parsed.hour,
             minute=parsed.minute,
             second=parsed.second,
@@ -84,7 +86,42 @@ def _build_time(t=None, value=None, ev=None):
         return ev.date_admission or ev.date_from
 
 
-def _logic_explain(rules, ev, rule_data):
+def _logic_annotate_for_graphic_explain(rules, ev, rule_data, now_dt):
+    logic_environment = _get_logic_environment(ev, now_dt)
+    event = ev if isinstance(ev, Event) else ev.event
+
+    def _evaluate_inners(r):
+        if not isinstance(r, dict):
+            return r
+        operator = list(r.keys())[0]
+        values = r[operator]
+        if operator in ("and", "or"):
+            return {operator: [_evaluate_inners(v) for v in values]}
+        result = logic_environment.apply(r, rule_data)
+        return {**r, '__result': result}
+
+    def _add_var_values(r):
+        if not isinstance(r, dict):
+            return r
+        operator = [k for k in r.keys() if not k.startswith("__")][0]
+        values = r[operator]
+        if operator == "var":
+            var = values[0] if isinstance(values, list) else values
+            val = rule_data[var]
+            if var == "product":
+                val = str(event.items.get(pk=val))
+            elif var == "variation":
+                val = str(ItemVariation.objects.get(item__event=event, pk=val))
+            elif isinstance(val, datetime):
+                val = date_format(val.astimezone(ev.timezone), "SHORT_DATETIME_FORMAT")
+            return {"var": var, "__result": val}
+        else:
+            return {**r, operator: [_add_var_values(v) for v in values]}
+
+    return _add_var_values(_evaluate_inners(rules))
+
+
+def _logic_explain(rules, ev, rule_data, now_dt=None):
     """
     Explains when the logic denied the check-in. Only works for a denied check-in.
 
@@ -114,7 +151,8 @@ def _logic_explain(rules, ev, rule_data):
     Additionally, we favor a "close failure". Therefore, in the above example, we'd show "You can only
     get in before 17:00". In the middle of the night it would switch to "You can only get in after 09:00".
     """
-    logic_environment = _get_logic_environment(ev)
+    now_dt = now_dt or now()
+    logic_environment = _get_logic_environment(ev, now_dt)
     _var_values = {'False': False, 'True': True}
     _var_explanations = {}
 
@@ -191,16 +229,16 @@ def _logic_explain(rules, ev, rule_data):
     for vname, data in _var_explanations.items():
         var, operator, rhs = data['var'], data['operator'], data['rhs']
         if var == 'now':
-            compare_to = _build_time(*rhs[0]['buildTime'], ev=ev).astimezone(ev.timezone)
+            compare_to = _build_time(*rhs[0]['buildTime'], ev=ev, now_dt=now_dt).astimezone(ev.timezone)
             tolerance = timedelta(minutes=float(rhs[1])) if len(rhs) > 1 and rhs[1] else timedelta(seconds=0)
             if operator == 'isBefore':
                 compare_to += tolerance
             else:
                 compare_to -= tolerance
 
-            var_weights[vname] = (200, abs(now() - compare_to).total_seconds())
+            var_weights[vname] = (200, abs(now_dt - compare_to).total_seconds())
 
-            if abs(now() - compare_to) < timedelta(hours=12):
+            if abs(now_dt - compare_to) < timedelta(hours=12):
                 compare_to_text = date_format(compare_to, 'TIME_FORMAT')
             else:
                 compare_to_text = date_format(compare_to, 'SHORT_DATETIME_FORMAT')
@@ -299,7 +337,7 @@ def _logic_explain(rules, ev, rule_data):
     return ', '.join(var_texts[v] for v in paths_with_min_weight[0] if not _var_values[v])
 
 
-def _get_logic_environment(ev):
+def _get_logic_environment(ev, now_dt):
     # Every change to our supported JSON logic must be done
     # * in pretix.base.services.checkin
     # * in pretix.base.models.checkin
@@ -316,7 +354,7 @@ def _get_logic_environment(ev):
     logic.add_operation('objectList', lambda *objs: list(objs))
     logic.add_operation('lookup', lambda model, pk, str: int(pk))
     logic.add_operation('inList', lambda a, b: a in b)
-    logic.add_operation('buildTime', partial(_build_time, ev=ev))
+    logic.add_operation('buildTime', partial(_build_time, ev=ev, now_dt=now_dt))
     logic.add_operation('isBefore', is_before)
     logic.add_operation('isAfter', lambda t1, t2, tol=None: is_before(t2, t1, tol))
     return logic
@@ -357,7 +395,7 @@ class LazyRuleVars:
     @cached_property
     def entries_today(self):
         tz = self._clist.event.timezone
-        midnight = now().astimezone(tz).replace(hour=0, minute=0, second=0, microsecond=0)
+        midnight = self._dt.astimezone(tz).replace(hour=0, minute=0, second=0, microsecond=0)
         return self._position.checkins.filter(type=Checkin.TYPE_ENTRY, list=self._clist, datetime__gte=midnight).count()
 
     @cached_property
@@ -378,7 +416,7 @@ class LazyRuleVars:
                 # between platforms (None<1 is true on some, but not all), we rather choose something that is at least
                 # consistent.
                 return -1
-            return (now() - last_entry.datetime).total_seconds() // 60
+            return (self._dt - last_entry.datetime).total_seconds() // 60
 
     @cached_property
     def minutes_since_first_entry(self):
@@ -390,7 +428,7 @@ class LazyRuleVars:
                 # between platforms (None<1 is true on some, but not all), we rather choose something that is at least
                 # consistent.
                 return -1
-            return (now() - last_entry.datetime).total_seconds() // 60
+            return (self._dt - last_entry.datetime).total_seconds() // 60
 
 
 class SQLLogic:
@@ -439,7 +477,7 @@ class SQLLogic:
 
         if operator == 'buildTime':
             if values[0] == "custom":
-                return Value(dateutil.parser.parse(values[1]).astimezone(pytz.UTC))
+                return Value(dateutil.parser.parse(values[1]).astimezone(timezone.utc))
             elif values[0] == "customtime":
                 parsed = dateutil.parser.parse(values[1])
                 return Value(now().astimezone(self.list.event.timezone).replace(
@@ -447,7 +485,7 @@ class SQLLogic:
                     minute=parsed.minute,
                     second=parsed.second,
                     microsecond=parsed.microsecond,
-                ).astimezone(pytz.UTC))
+                ).astimezone(timezone.utc))
             elif values[0] == 'date_from':
                 return Coalesce(
                     F('subevent__date_from'),
@@ -475,7 +513,7 @@ class SQLLogic:
             return int(values[1])
         elif operator == 'var':
             if values[0] == 'now':
-                return Value(now().astimezone(pytz.UTC))
+                return Value(now().astimezone(timezone.utc))
             elif values[0] == 'now_isoweekday':
                 return Value(now().astimezone(self.list.event.timezone).isoweekday())
             elif values[0] == 'product':
@@ -693,7 +731,7 @@ def _save_answers(op, answers, given_answers):
 def perform_checkin(op: OrderPosition, clist: CheckinList, given_answers: dict, force=False,
                     ignore_unpaid=False, nonce=None, datetime=None, questions_supported=True,
                     user=None, auth=None, canceled_supported=False, type=Checkin.TYPE_ENTRY,
-                    raw_barcode=None, raw_source_type=None, from_revoked_secret=False):
+                    raw_barcode=None, raw_source_type=None, from_revoked_secret=False, simulate=False):
     """
     Create a checkin for this particular order position and check-in list. Fails with CheckInError if the check in is
     not valid at this time.
@@ -707,6 +745,7 @@ def perform_checkin(op: OrderPosition, clist: CheckinList, given_answers: dict,
     :param questions_supported: When set to False, questions are ignored
     :param nonce: A random nonce to prevent race conditions.
     :param datetime: The datetime of the checkin, defaults to now.
+    :param simulate: If true, the check-in is not saved.
     """
 
     # !!!!!!!!!
@@ -734,7 +773,7 @@ def perform_checkin(op: OrderPosition, clist: CheckinList, given_answers: dict,
                 'blocked'
             )
 
-    if type != Checkin.TYPE_EXIT and op.valid_from and op.valid_from > now():
+    if type != Checkin.TYPE_EXIT and op.valid_from and op.valid_from > dt:
         if force:
             force_used = True
         else:
@@ -748,7 +787,7 @@ def perform_checkin(op: OrderPosition, clist: CheckinList, given_answers: dict,
                 ),
             )
 
-    if type != Checkin.TYPE_EXIT and op.valid_until and op.valid_until < now():
+    if type != Checkin.TYPE_EXIT and op.valid_until and op.valid_until < dt:
         if force:
             force_used = True
         else:
@@ -773,7 +812,8 @@ def perform_checkin(op: OrderPosition, clist: CheckinList, given_answers: dict,
             if q not in given_answers and q not in answers:
                 require_answers.append(q)
 
-        _save_answers(op, answers, given_answers)
+        if not simulate:
+            _save_answers(op, answers, given_answers)
 
     with transaction.atomic():
         # Lock order positions, if it is an entry. We don't need it for exits, as a race condition wouldn't be problematic
@@ -821,7 +861,7 @@ def perform_checkin(op: OrderPosition, clist: CheckinList, given_answers: dict,
 
         if type == Checkin.TYPE_ENTRY and clist.rules:
             rule_data = LazyRuleVars(op, clist, dt)
-            logic = _get_logic_environment(op.subevent or clist.event)
+            logic = _get_logic_environment(op.subevent or clist.event, now_dt=dt)
             if not logic.apply(clist.rules, rule_data):
                 if force:
                     force_used = True
@@ -846,7 +886,7 @@ def perform_checkin(op: OrderPosition, clist: CheckinList, given_answers: dict,
         if isinstance(auth, Device):
             device = auth
 
-        last_cis = list(op.checkins.order_by('-datetime').filter(list=clist).only('type', 'nonce'))
+        last_cis = list(op.checkins.order_by('-datetime').filter(list=clist).only('type', 'nonce', 'position_id'))
         entry_allowed = (
             type == Checkin.TYPE_EXIT or
             clist.allow_multiple_entries or
@@ -859,30 +899,33 @@ def perform_checkin(op: OrderPosition, clist: CheckinList, given_answers: dict,
             return
 
         if entry_allowed or force:
-            ci = Checkin.objects.create(
+            if simulate:
-                position=op,
+                return True
-                type=type,
+            else:
-                list=clist,
+                ci = Checkin.objects.create(
-                datetime=dt,
+                    position=op,
-                device=device,
+                    type=type,
-                gate=device.gate if device else None,
+                    list=clist,
-                nonce=nonce,
+                    datetime=dt,
-                forced=force and (not entry_allowed or from_revoked_secret or force_used),
+                    device=device,
-                force_sent=force,
+                    gate=device.gate if device else None,
-                raw_barcode=raw_barcode,
+                    nonce=nonce,
-                raw_source_type=raw_source_type,
+                    forced=force and (not entry_allowed or from_revoked_secret or force_used),
-            )
+                    force_sent=force,
-            op.order.log_action('pretix.event.checkin', data={
+                    raw_barcode=raw_barcode,
-                'position': op.id,
+                    raw_source_type=raw_source_type,
-                'positionid': op.positionid,
+                )
-                'first': True,
+                op.order.log_action('pretix.event.checkin', data={
-                'forced': force or op.order.status != Order.STATUS_PAID,
+                    'position': op.id,
-                'datetime': dt,
+                    'positionid': op.positionid,
-                'type': type,
+                    'first': True,
-                'answers': {k.pk: str(v) for k, v in given_answers.items()},
+                    'forced': force or op.order.status != Order.STATUS_PAID,
-                'list': clist.pk
+                    'datetime': dt,
-            }, user=user, auth=auth)
+                    'type': type,
-            checkin_created.send(op.order.event, checkin=ci)
+                    'answers': {k.pk: str(v) for k, v in given_answers.items()},
+                    'list': clist.pk
+                }, user=user, auth=auth)
+                checkin_created.send(op.order.event, checkin=ci)
         else:
             raise CheckInError(
                 _('This ticket has already been redeemed.'),
@@ -926,14 +969,11 @@ def process_exit_all(sender, **kwargs):
         if cl.event.settings.get(f'autocheckin_dst_hack_{cl.pk}'):  # move time back if yesterday was DST switch
             d -= timedelta(hours=1)
             cl.event.settings.delete(f'autocheckin_dst_hack_{cl.pk}')
-        try:
+
-            cl.exit_all_at = make_aware(datetime.combine(d.date() + timedelta(days=1), d.time()), cl.event.timezone)
+        cl.exit_all_at = make_aware(datetime.combine(d.date() + timedelta(days=1), d.time().replace(fold=1)), cl.event.timezone)
-        except pytz.exceptions.AmbiguousTimeError:
+        if not datetime_exists(cl.exit_all_at):
-            cl.exit_all_at = make_aware(datetime.combine(d.date() + timedelta(days=1), d.time()), cl.event.timezone,
-                                        is_dst=False)
-        except pytz.exceptions.NonExistentTimeError:
             cl.event.settings.set(f'autocheckin_dst_hack_{cl.pk}', True)
             d += timedelta(hours=1)
-            cl.exit_all_at = make_aware(datetime.combine(d.date() + timedelta(days=1), d.time()), cl.event.timezone)
+            cl.exit_all_at = make_aware(datetime.combine(d.date() + timedelta(days=1), d.time().replace(fold=1)), cl.event.timezone)
             # AmbiguousTimeError shouldn't be possible since d.time() includes fold=0
         cl.save(update_fields=['exit_all_at'])