Remove unused import

(would have to move this to UserPasswordChangeForm but decided to remove instead as it's redundant)

.licenseheader

@@ -1,7 +1,7 @@
 This file is part of pretix (Community Edition).
 
-Copyright (C) 2014-2020 Raphael Michel and contributors
+Copyright (C) 2014-2020  Raphael Michel and contributors
-Copyright (C) 2020-2021 rami.io GmbH and contributors
+Copyright (C) 2020-today pretix 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.

README.rst

@@ -8,6 +8,7 @@ pretix
    :target: https://docs.pretix.eu/
 
 .. image:: https://github.com/pretix/pretix/workflows/Tests/badge.svg
+   :target: https://github.com/pretix/pretix/actions/workflows/tests.yml
 
 .. image:: https://codecov.io/gh/pretix/pretix/branch/master/graph/badge.svg
    :target: https://codecov.io/gh/pretix/pretix

doc/api/resources/checkin.rst

@@ -359,3 +359,156 @@ Performing a ticket search
    :statuscode 401: Authentication failure
    :statuscode 403: The requested organizer or check-in list does not exist **or** you have no permission to view this resource.
    :statuscode 404: The requested check-in list does not exist.
+
+.. _`rest-checkin-annul`:
+
+Annulment of a check-in
+-----------------------
+
+.. http:post:: /api/v1/organizers/(organizer)/checkinrpc/annul/
+
+   If a check-in was made in error and the person was not let in, it can be annulled. We do not recommend this to be used
+   in case of manual check-ins or user interfaces because it is too prone for human errors. It is mostly intended for
+   automated entry systems like a turnstile or automated door, where the check-in is first created, then the door is
+   opened, and then the check-in may be annulled if the system knows that the turnstile did not turn or was out of
+   order.
+
+   This endpoint supports passing multiple check-in lists for the context of a multi-event scan. However, each
+   check-in list passed needs to be from a distinct event.
+
+   Check-ins created by a device can only be annulled by the same device. The datetime of annulment may not be more than
+   15 minutes after the datetime of check-in (value subject to change).
+
+   A status code of 404 is returned if no check-in was found for the given nonce. A status code of 400 is returned when
+   multiple check-ins match the nonce, the input is invalid in another way, the annulment is made from the wrong device,
+   the check-in is already in an annulled or failed state, or the datetime constraint is not valid.
+
+   :<json string nonce: ``nonce`` value of the original check-in.
+   :<json array lists: List of check-in list IDs to search on. No two check-in lists may be from the same event.
+   :<json datetime datetime: Specifies the client-side datetime of the annulment. If not supplied, the current time will be used.
+   :<json string error_explanation: A human-readable description of why the check-in was annulled (optional).
+   :>json string status: ``"ok"``
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+      POST /api/v1/organizers/bigevents/checkinrpc/annul/ HTTP/1.1
+      Host: pretix.eu
+      Accept: application/json, text/javascript
+
+      {
+        "lists": [1],
+        "nonce": "Pvrk50vUzQd0DhdpNRL4I4OcXsvg70uA",
+        "error_explanation": "Turnstile did not turn"
+      }
+
+   **Example successful response**:
+
+   .. sourcecode:: http
+
+      HTTP/1.1 200 OK
+      Vary: Accept
+      Content-Type: application/json
+
+      {
+        "status": "ok",
+      }
+
+   :param organizer: The ``slug`` field of the organizer to fetch
+   :statuscode 200: no error
+   :statuscode 400: Invalid or incomplete request, see above
+   :statuscode 401: Authentication failure
+   :statuscode 403: The requested organizer/event does not exist **or** you have no permission to view this resource.
+   :statuscode 404: The requested nonce does not exist.
+
+
+Check-in history
+----------------
+
+.. rst-class:: rest-resource-table
+
+===================================== ========================== =======================================================
+Field                                 Type                       Description
+===================================== ========================== =======================================================
+id                                    integer                    Internal ID of the check-in
+successful                            boolean                    Whether the check-in was successful
+error_reason                          string                     Category of reason why the check-in was unsuccessful. Currently
+                                                                 ``"canceled"``, ``"invalid"``, ``"unpaid"`` ``"product"``,
+                                                                 ``"rules"``, ``"revoked"``, ``"incomplete"``, ``"already_redeemed"``,
+                                                                 ``"ambiguous"``, ``"error"``, ``"blocked"``, ``"unapproved"``,
+                                                                 ``"invalid_time"``, ``"annulled"`` or ``null``
+error_explanation                     string                     Additional, human-readable reason for the check-in to be unsuccessful (or ``null``)
+position                              integer                    Internal ID of the order position (or ``null`` for unknown scans)
+datetime                              datetime                   Logical time when the check-in happened
+created                               datetime                   Time when the check-in appeared on the server
+list                                  integer                    Internal ID of the check-in list
+auto_checked_in                       boolean                    Whether the check-in was performed by the system automatically
+gate                                  integer                    Internal ID of the gate (or ``null``)
+device                                integer                    Internal ID of the device (or ``null``)
+device_id                             integer                    Organizer-internal ID of the device (or ``null``)
+type                                  string                     Type of check-in, currently ``"entry"`` or ``"exit"``
+===================================== ========================== =======================================================
+
+.. http:get:: /api/v1/organizers/(organizer)/events/(event)/checkins/
+
+   Returns a list of all check-in events within a given event.
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+      GET /api/v1/organizers/bigevents/events/sampleconf/checkins/ 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": [
+          {
+            "id": 1,
+            "successful": true,
+            "error_reason": null,
+            "error_explanation": null,
+            "position": 1234,
+            "datetime": "2017-12-25T12:45:23Z",
+            "created": "2017-12-25T12:45:23Z",
+            "list": 2,
+            "auto_checked_in": false,
+            "gate": null,
+            "device": null,
+            "device_id": null,
+            "type": "entry",
+          }
+        ]
+      }
+
+   :query integer page: The page number in case of a multi-page result set, default is 1
+   :query datetime created_since: Only return check-ins that have been created since the given date (inclusive).
+   :query datetime created_before: Only return check-ins that have been created before the given date (exclusive).
+   :query datetime datetime_since: Only return check-ins that have happened since the given date (inclusive).
+   :query datetime datetime_before: Only return check-ins that have happened before the given date (exclusive).
+   :query boolean successful: Only return check-ins that have (not) been successful.
+   :query boolean error_reason: Only return check-ins with a specific error reason.
+   :query integer list: Only return check-ins from a specific list.
+   :query string type: Only return check-ins of a specific type.
+   :query integer gate: Only return check-ins from a specific gate.
+   :query integer device: Only return check-ins from a specific device.
+   :query boolean auto_checked_in: Only return check-ins that are (not) auto-checked in.
+   :query string ordering: Manually set the ordering of results. Valid fields to be used are ``datetime``, ``created``,
+                           and ``id``.
+   :param organizer: The ``slug`` field of the organizer to fetch
+   :param event: The ``slug`` field of the event 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.

doc/api/resources/events.rst

@@ -424,9 +424,9 @@ Endpoints
    :param organizer: The ``slug`` field of the organizer of the event to create.
    :param event: The ``slug`` field of the event to copy settings and items from.
    :statuscode 201: no error
-   :statuscode 400: The event could not be created due to invalid submitted data.
+   :statuscode 400: The event could not be updated due to invalid submitted data.
    :statuscode 401: Authentication failure
-   :statuscode 403: The requested organizer does not exist **or** you have no permission to create this resource.
+   :statuscode 403: The requested organizer does not exist **or** you have no permission to update this resource.
 
 
 .. http:patch:: /api/v1/organizers/(organizer)/events/(event)/

doc/api/resources/exhibitors.rst

@@ -349,6 +349,45 @@ Endpoints
    :statuscode 401: Authentication failure
    :statuscode 403: The requested organizer or event or exhibitor does not exist **or** you have no permission to view it.
 
+.. http:post:: /api/v1/organizers/(organizer)/events/(event)/exhibitors/(id)/vouchers/bulk_attach/
+
+   Attaches many **existing** vouchers to an exhibitor. You need to send either the ``id`` **or** the ``code`` field of
+   the voucher, but you need to send the same field for all entries.
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+      POST /api/v1/organizers/bigevents/events/sampleconf/exhibitors/1/vouchers/bulk_attach/ HTTP/1.1
+      Host: pretix.eu
+      Accept: application/json, text/javascript
+
+     [
+       {
+         "id": 15,
+         "exhibitor_comment": "Free ticket"
+       },
+       ..
+     ]
+
+   **Example response**:
+
+   .. sourcecode:: http
+
+      HTTP/1.1 200 OK
+      Vary: Accept
+      Content-Type: application/json
+
+      {}
+
+   :param organizer: The ``slug`` field of a valid organizer
+   :param event: The ``slug`` field of the event to use
+   :param id: The ``id`` field of the exhibitor to use
+   :statuscode 200: no error
+   :statuscode 400: Invalid data sent, e.g. voucher does not exist
+   :statuscode 401: Authentication failure
+   :statuscode 403: The requested organizer or event or exhibitor does not exist **or** you have no permission to view it.
+
 .. http:post:: /api/v1/organizers/(organizer)/events/(event)/exhibitors/
 
    Create a new exhibitor.

doc/api/resources/index.rst

@@ -55,6 +55,7 @@ at :ref:`plugin-docs`.
    digital
    exhibitors
    imported_secrets
+   offlinesales
    shipping
    billing_invoices
    billing_var

doc/api/resources/invoices.rst

@@ -26,6 +26,8 @@ invoice_from_country                  string                     Sender address:
 invoice_from_tax_id                   string                     Sender address: Local Tax ID
 invoice_from_vat_id                   string                     Sender address: EU VAT ID
 invoice_to                            string                     Full recipient address
+invoice_to_is_business                boolean                    Recipient address: Business vs individual (``null`` for
+                                                                 invoices created before pretix 2025.6).
 invoice_to_company                    string                     Recipient address: Company name
 invoice_to_name                       string                     Recipient address: Person name
 invoice_to_street                     string                     Recipient address: Address lines
@@ -35,6 +37,7 @@ invoice_to_state                      string                     Recipient addre
 invoice_to_country                    string                     Recipient address: Country code
 invoice_to_vat_id                     string                     Recipient address: EU VAT ID
 invoice_to_beneficiary                string                     Invoice beneficiary
+invoice_to_transmission_info          object                     Additional transmission info (see :ref:`rest-transmission-types`)
 custom_field                          string                     Custom invoice address field
 date                                  date                       Invoice date
 refers                                string                     Invoice number of an invoice this invoice refers to
@@ -77,17 +80,12 @@ lines                                 list of objects            The actual invo
                                                                  for all invoice lines
                                                                  created before this field was introduced as well as for
                                                                  all lines not created by a fee (e.g. a product).
-├ event_date_from                     datetime                   Start date of the (sub)event this line was created for as it
+├ period_start                        datetime                   Start date of the service or delivery period of the invoice line.
-                                                                 was set during invoice creation. Can be ``null`` for all invoice
+                                                                 Can be ``null`` if not known.
-                                                                 lines created before this was introduced as well as for lines in
+├ period_end                          datetime                   End date of the service or delivery period of the invoice line.
-                                                                 an event series not created by a product (e.g. shipping or
+                                                                 Can be ``null`` if not known.
-                                                                 cancellation fees).
+├ event_date_from                     datetime                   Deprecated alias of ``period_start``.
-├ event_date_to                       datetime                   End date of the (sub)event this line was created for as it
+├ event_date_to                       datetime                   Deprecated alias of ``period_end``.
-                                                                 was set during invoice creation. Can be ``null`` for all invoice
-                                                                 lines created before this was introduced as well as for lines in
-                                                                 an event series not created by a product (e.g. shipping or
-                                                                 cancellation fees) as well as whenever the respective (sub)event
-                                                                 has no end date set.
 ├ event_location                      string                     Location of the (sub)event this line was created for as it
                                                                  was set during invoice creation. Can be ``null`` for all invoice
                                                                  lines created before this was introduced as well as for lines in
@@ -110,6 +108,12 @@ foreign_currency_rate                 decimal (string)           If ``foreign_cu
 foreign_currency_rate_date            date                       If ``foreign_currency_rate`` is set, this signifies the
                                                                  date at which the currency rate was obtained.
 internal_reference                    string                     Customer's reference to be printed on the invoice.
+transmission_type                     string                     Requested transmission channel (see :ref:`rest-transmission-types`)
+transmission_provider                 string                     Selected transmission provider (depends on installed
+                                                                 plugins). ``null`` if not yet chosen.
+transmission_status                   string                     Transmission status, one of ``unknown`` (pre-2025.6),
+                                                                 ``pending``, ``inflight``, ``failed``, and ``completed``.
+transmission_date                     datetime                   Time of last change in transmission status (may be ``null``).
 ===================================== ========================== =======================================================
 
 
@@ -121,6 +125,76 @@ internal_reference                    string                     Customer's refe
 
    The ``tax_code`` attribute has been added.
 
+.. versionchanged:: 2025.6
+
+   The attributes ``invoice_to_is_business``, ``invoice_to_transmission_info``, ``transmission_type``,
+   ``transmission_provider``, ``transmission_status``, and ``transmission_date`` have been added.
+
+
+.. _`rest-transmission-types`:
+
+Transmission types
+------------------
+
+pretix supports multiple ways to transmit an invoice from the organizer to the invoice recipient.
+For each transmission type, different fields are supported in the ``transmission_info`` object of the
+invoice address. Currently, pretix supports the following transmission types:
+
+Email
+"""""
+
+The identifier ``"email"`` represents the transmission of PDF invoices through email.
+This is the default transmission type in pretix and has some special behavior for backwards compatibility.
+Transmission is always executed through the provider ``"email_pdf"``.
+The ``transmission_info`` object may contain the following properties:
+
+.. rst-class:: rest-resource-table
+
+===================================== ========================== =======================================================
+Field                                 Type                       Description
+===================================== ========================== =======================================================
+transmission_email_address            string                     Optional. An email address other than the order address
+                                                                 that the invoice should be sent to.
+                                                                 Business customers only.
+===================================== ========================== =======================================================
+
+Peppol
+""""""
+
+The identifier ``"peppol"`` represents the transmission of XML invoices through the `Peppol`_ network.
+This is only available for business addresses.
+This is not supported by pretix out of the box and requires the use of a suitable plugin.
+The ``transmission_info`` object may contain the following properties:
+
+.. rst-class:: rest-resource-table
+
+===================================== ========================== =======================================================
+Field                                 Type                       Description
+===================================== ========================== =======================================================
+transmission_peppol_participant_id    string                     Required. The Peppol participant ID of the recipient.
+===================================== ========================== =======================================================
+
+Italian Exchange System
+"""""""""""""""""""""""
+
+The identifier ``"it_sdi"`` represents the transmission of XML invoices through the `Sistema di Interscambio`_ network used in Italy.
+This is only available for addresses with country ``"IT"``.
+This is not supported by pretix out of the box and requires the use of a suitable plugin.
+The ``transmission_info`` object may contain the following properties:
+
+.. rst-class:: rest-resource-table
+
+===================================== ========================== =======================================================
+Field                                 Type                       Description
+===================================== ========================== =======================================================
+transmission_it_sdi_codice_fiscale    string                     Required for non-business address. Fiscal code of the
+                                                                 recipient.
+transmission_it_sdi_pec               string                     Required for business addresses. Address for certified
+                                                                 electronic mail.
+transmission_it_sdi_recipient_code    string                     Required for businesses. SdI recipient code.
+===================================== ========================== =======================================================
+
+If this type is selected, ``vat_id`` is required for business addresses.
 
 List of all invoices
 --------------------
@@ -164,6 +238,7 @@ List of all invoices
             "invoice_from_vat_id":"",
             "invoice_to": "Sample company\nJohn Doe\nTest street 12\n12345 Testington\nTestikistan\nVAT-ID: EU123456789",
             "invoice_to_company": "Sample company",
+            "invoice_to_is_business": true,
             "invoice_to_name": "John Doe",
             "invoice_to_street": "Test street 12",
             "invoice_to_zipcode": "12345",
@@ -172,6 +247,7 @@ List of all invoices
             "invoice_to_country": "TE",
             "invoice_to_vat_id": "EU123456789",
             "invoice_to_beneficiary": "",
+            "invoice_to_transmission_info": {},
             "custom_field": null,
             "date": "2017-12-01",
             "refers": null,
@@ -193,6 +269,8 @@ List of all invoices
                 "fee_internal_type": null,
                 "event_date_from": "2017-12-27T10:00:00Z",
                 "event_date_to": null,
+                "period_start": "2017-12-27T10:00:00Z",
+                "period_end": "2017-12-27T10:00:00Z",
                 "event_location": "Heidelberg",
                 "attendee_name": null,
                 "gross_value": "23.00",
@@ -204,7 +282,11 @@ List of all invoices
             ],
             "foreign_currency_display": "PLN",
             "foreign_currency_rate": "4.2408",
-            "foreign_currency_rate_date": "2017-07-24"
+            "foreign_currency_rate_date": "2017-07-24",
+            "transmission_type": "email",
+            "transmission_provider": "email_pdf",
+            "transmission_status": "completed",
+            "transmission_date": "2017-07-24T10:00:00Z"
           }
         ]
       }
@@ -304,6 +386,7 @@ Fetching individual invoices
         "invoice_from_vat_id":"",
         "invoice_to": "Sample company\nJohn Doe\nTest street 12\n12345 Testington\nTestikistan\nVAT-ID: EU123456789",
         "invoice_to_company": "Sample company",
+        "invoice_to_is_business": true,
         "invoice_to_name": "John Doe",
         "invoice_to_street": "Test street 12",
         "invoice_to_zipcode": "12345",
@@ -312,6 +395,7 @@ Fetching individual invoices
         "invoice_to_country": "TE",
         "invoice_to_vat_id": "EU123456789",
         "invoice_to_beneficiary": "",
+        "invoice_to_transmission_info": {},
         "custom_field": null,
         "date": "2017-12-01",
         "refers": null,
@@ -333,6 +417,8 @@ Fetching individual invoices
             "fee_internal_type": null,
             "event_date_from": "2017-12-27T10:00:00Z",
             "event_date_to": null,
+            "period_start": "2017-12-27T10:00:00Z",
+            "period_end": "2017-12-27T10:00:00Z",
             "event_location": "Heidelberg",
             "attendee_name": null,
             "gross_value": "23.00",
@@ -344,7 +430,11 @@ Fetching individual invoices
         ],
         "foreign_currency_display": "PLN",
         "foreign_currency_rate": "4.2408",
-        "foreign_currency_rate_date": "2017-07-24"
+        "foreign_currency_rate_date": "2017-07-24",
+        "transmission_type": "email",
+        "transmission_provider": "email_pdf",
+        "transmission_status": "completed",
+        "transmission_date": "2017-07-24T10:00:00Z"
       }
 
    :param organizer: The ``slug`` field of the organizer to fetch
@@ -449,3 +539,70 @@ Invoices cannot be edited directly, but the following actions can be triggered:
    :statuscode 400: The invoice has already been canceled
    :statuscode 401: Authentication failure
    :statuscode 403: The requested organizer/event does not exist **or** you have no permission to change this resource.
+
+
+Transmitting invoices
+---------------------
+
+Invoices are transmitted automatically when created during order creation or payment receipt,
+but in other cases transmission may need to be triggered manually.
+
+.. http:post:: /api/v1/organizers/(organizer)/events/(event)/invoices/(number)/transmit/
+
+   Transmits the invoice to the recipient, but only if it is in ``pending`` state.
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+      GET /api/v1/organizers/bigevents/events/sampleconf/invoices/00001/transmit/ HTTP/1.1
+      Host: pretix.eu
+      Accept: application/json, text/javascript
+
+   **Example response**:
+
+   .. sourcecode:: http
+
+      HTTP/1.1 204 No Content
+      Vary: Accept
+      Content-Type: application/pdf
+
+   :param organizer: The ``slug`` field of the organizer to fetch
+   :param event: The ``slug`` field of the event to fetch
+   :param number: The ``number`` field of the invoice to transmit
+   :statuscode 200: no error
+   :statuscode 401: Authentication failure
+   :statuscode 403: The requested organizer/event does not exist **or** you have no permission to transmit this invoice **or** the invoice may not be transmitted
+   :statuscode 409: The invoice is currently in transmission
+
+.. http:post:: /api/v1/organizers/(organizer)/events/(event)/invoices/(number)/retransmit/
+
+   Transmits the invoice to the recipient even if transmission was already attempted previously.
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+      GET /api/v1/organizers/bigevents/events/sampleconf/invoices/00001/retransmit/ HTTP/1.1
+      Host: pretix.eu
+      Accept: application/json, text/javascript
+
+   **Example response**:
+
+   .. sourcecode:: http
+
+      HTTP/1.1 204 No Content
+      Vary: Accept
+      Content-Type: application/pdf
+
+   :param organizer: The ``slug`` field of the organizer to fetch
+   :param event: The ``slug`` field of the event to fetch
+   :param number: The ``number`` field of the invoice to transmit
+   :statuscode 200: no error
+   :statuscode 401: Authentication failure
+   :statuscode 403: The requested organizer/event does not exist **or** you have no permission to transmit this invoice **or** the invoice may not be transmitted
+   :statuscode 409: The invoice is currently in transmission
+
+
+.. _Peppol: https://en.wikipedia.org/wiki/PEPPOL
+.. _Sistema di Interscambio: https://it.wikipedia.org/wiki/Fattura_elettronica_in_Italia

doc/api/resources/offlinesales.rst

@@ -0,0 +1,219 @@
+Offline sales
+=============
+
+.. note:: This API is only available when the plugin **pretix-offlinesales** is installed (pretix Hosted and Enterprise only).
+
+The offline sales module allows you to create batches of tickets intended for the sale outside the system.
+
+Resource description
+--------------------
+
+The offline sales batch resource contains the following public fields:
+
+.. rst-class:: rest-resource-table
+
+===================================== ========================== =======================================================
+Field                                 Type                       Description
+===================================== ========================== =======================================================
+id                                    integer                    Internal batch ID
+creation                              datetime                   Time of creation
+testmode                              boolean                    ``true`` if orders are created in test mode
+sales_channel                         string                     Sales channel of the orders
+layout                                integer                    Internal ID of the chosen ticket layout
+subevent                              integer                    Internal ID of the chosen subevent (or ``null``)
+item                                  integer                    Internal ID of the chosen product
+variation                             integer                    Internal ID of the chosen variation (or ``null``)
+amount                                integer                    Number of tickets in the batch
+comment                               string                     Internal comment
+orders                                list of strings            List of order codes (omitted in list view for performance reasons)
+===================================== ========================== =======================================================
+
+Endpoints
+---------
+
+.. http:get:: /api/v1/organizers/(organizer)/events/(event)/offlinesalesbatches/
+
+   Returns a list of all offline sales batches
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+      GET /api/v1/organizers/bigevents/events/democon/offlinesalesbatches/ HTTP/1.1
+      Host: pretix.eu
+      Accept: application/json, text/javascript
+
+   **Example response**:
+
+   .. sourcecode:: http
+
+      HTTP/1.1 200 OK
+      Vary: Accept
+      Content-Type: text/javascript
+
+      {
+        "count": 1,
+        "next": null,
+        "previous": null,
+        "results": [
+          {
+            "id": 1,
+            "creation": "2025-07-08T18:27:32.134368+02:00",
+            "testmode": False,
+            "sales_channel": "web",
+            "comment": "Batch for sale at the event",
+            "layout": 3,
+            "subevent": null,
+            "item": 23,
+            "variation": null,
+            "amount": 7
+          }
+        ]
+      }
+
+   :query page: The page number in case of a multi-page result set, default is 1
+   :param organizer: The ``slug`` field of a valid organizer
+   :param event: The ``slug`` field of a valid event
+   :statuscode 200: no error
+   :statuscode 401: Authentication failure
+   :statuscode 403: The requested organizer does not exist **or** you have no permission to view it.
+
+.. http:get:: /api/v1/organizers/(organizer)/events/(event)/offlinesalesbatches/(id)/
+
+   Returns information on a given batch.
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+      GET /api/v1/organizers/bigevents/events/democon/offlinesalesbatches/1/ HTTP/1.1
+      Host: pretix.eu
+      Accept: application/json, text/javascript
+
+   **Example response**:
+
+   .. sourcecode:: http
+
+      HTTP/1.1 200 OK
+      Vary: Accept
+      Content-Type: text/javascript
+
+      {
+        "id": 1,
+        "creation": "2025-07-08T18:27:32.134368+02:00",
+        "testmode": False,
+        "sales_channel": "web",
+        "comment": "Batch for sale at the event",
+        "layout": 3,
+        "subevent": null,
+        "item": 23,
+        "variation": null,
+        "amount": 7,
+        "orders": ["TSRNN", "3FBSL", "WMDNJ", "BHW9H", "MXSUG", "DSDAP", "URLLE"]
+      }
+
+   :param organizer: The ``slug`` field of the organizer to fetch
+   :param event: The ``slug`` field of the event to fetch
+   :param id: The ``id`` field of the batch 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 it.
+
+
+.. http:post:: /api/v1/organizers/(organizer)/events/(event)/offlinesalesbatches/
+
+   With this API call, you can instruct the system to create a new batch.
+
+   Since batches can contain up to 10,000 tickets, they are created asynchronously on the server.
+   If your input parameters validate correctly, a ``202 Accepted`` status code is returned.
+   The body points you to the check URL of the result. Running a ``GET`` request on that result URL will
+   yield one of the following status codes:
+
+    * ``200 OK`` – The creation of the batch has succeeded. The body will be your resulting batch with the same information as in the detail endpoint above.
+    * ``409 Conflict`` – Your creation job is still running. The body will be JSON with the structure ``{"status": "running"}``. ``status`` can be ``waiting`` before the task is actually being processed. Please retry, but wait at least one second before you do.
+    * ``410 Gone`` – Creating the batch has failed permanently (e.g. quota no longer available). The body will be JSON with the structure ``{"status": "failed", "message": "Error message"}``
+    * ``404 Not Found`` – The job does not exist / is expired.
+
+   .. note:: To avoid performance issues, a maximum amount of 10000 is currently allowed.
+
+   .. note:: Do not wait multiple hours or more to retrieve your result. After a longer wait time, ``409`` might be returned permanently due to technical constraints, even though nothing will happen any more.
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+      POST /api/v1/organizers/bigevents/events/sampleconf/offlinesalesbatches/ HTTP/1.1
+      Host: pretix.eu
+      Accept: application/json, text/javascript
+      Content-Type: application/json
+
+      {
+        "testmode": True,
+        "layout": 123,
+        "item": 14,
+        "sales_channel": "web",
+        "amount": 10,
+      }
+
+   **Example response**:
+
+   .. sourcecode:: http
+
+      HTTP/1.1 200 OK
+      Vary: Accept
+      Content-Type: application/json
+
+      {
+        "check": "https://pretix.eu/api/v1/organizers/bigevents/events/sampleconf/offlinesalesbatches/check/29891ede-196f-4942-9e26-d055a36e98b8/"
+      }
+
+   :param organizer: The ``slug`` field of the organizer to fetch
+   :param event: The ``slug`` field of the event to fetch
+   :statuscode 202: no error
+   :statuscode 400: Invalid input options
+   :statuscode 401: Authentication failure
+   :statuscode 403: The requested organizer/event does not exist **or** you have no permission to view this resource.
+
+
+.. http:post:: /api/v1/organizers/(organizer)/events/(event)/offlinesalesbatches/(id)/render/
+
+   With this API call, you can render the PDF representation of a batch.
+
+   Since batches can contain up to 10,000 tickets, they are rendered asynchronously on the server.
+   If your input parameters validate correctly, a ``202 Accepted`` status code is returned.
+   The body points you to the download URL of the result. Running a ``GET`` request on that result URL will
+   yield one of the following status codes:
+
+    * ``200 OK`` – The creation of the batch has succeeded. The body will be your resulting batch with the same information as in the detail endpoint above.
+    * ``409 Conflict`` – Your rendering process is still running. The body will be JSON with the structure ``{"status": "running"}``. ``status`` can be ``waiting`` before the task is actually being processed. Please retry, but wait at least one second before you do.
+    * ``410 Gone`` – Rendering the batch has failed permanently. The body will be JSON with the structure ``{"status": "failed", "message": "Error message"}``
+    * ``404 Not Found`` – The rendering job does not exist / is expired.
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+      POST /api/v1/organizers/bigevents/events/sampleconf/offlinesalesbatches/1/render 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
+
+      {
+        "download": "https://pretix.eu/api/v1/organizers/bigevents/events/sampleconf/offlinesalesbatches/1/download/29891ede-196f-4942-9e26-d055a36e98b8/3f279f13-c198-4137-b49b-9b360ce9fcce/"
+      }
+
+   :param organizer: The ``slug`` field of the organizer to fetch
+   :param event: The ``slug`` field of the event to fetch
+   :param id: The ``id`` field of the batch to fetch
+   :statuscode 202: no error
+   :statuscode 400: Invalid input options
+   :statuscode 401: Authentication failure
+   :statuscode 403: The requested organizer/event does not exist **or** you have no permission to view this resource.
+

doc/api/resources/orders.rst

@@ -41,6 +41,7 @@ expires                               datetime                   The order will
 payment_date                          date                       **DEPRECATED AND INACCURATE** Date of payment receipt
 payment_provider                      string                     **DEPRECATED AND INACCURATE** Payment provider used for this order
 total                                 money (string)             Total value of this order
+tax_rounding_mode                     string                     Tax rounding mode, see :ref:`algorithms-rounding`
 comment                               string                     Internal comment on this order
 api_meta                              object                     Meta data for that order. Only available through API, no guarantees
                                                                  on the content structure. You can use this to save references to your system.
@@ -65,11 +66,16 @@ invoice_address                       object                     Invoice address
 ├ state                               string                     Customer state (ISO 3166-2 code). Only supported in
                                                                  AU, BR, CA, CN, MY, MX, and US.
 ├ internal_reference                  string                     Customer's internal reference to be printed on the invoice
+
 ├ custom_field                        string                     Custom invoice address field
 ├ vat_id                              string                     Customer VAT ID
-└ vat_id_validated                    string                     ``true``, if the VAT ID has been validated against the
+├ vat_id_validated                    string                     ``true``, if the VAT ID has been validated against the
                                                                  EU VAT service and validation was successful. This only
                                                                  happens in rare cases.
+├ transmission_type                   string                     Transmission channel for invoice (see also :ref:`rest-transmission-types`).
+                                                                 Defaults to ``email``.
+└ transmission_info                   object                     Transmission-channel specific information (or ``null``).
+                                                                 See also :ref:`rest-transmission-types`.
 positions                             list of objects            List of order positions (see below). By default, only
                                                                  non-canceled positions are included.
 fees                                  list of objects            List of fees included in the order total. By default, only
@@ -142,6 +148,14 @@ plugin_data                           object                     Additional data
 
    The ``plugin_data`` attribute has been added.
 
+.. versionchanged:: 2025.6
+
+   The ``invoice_address.transmission_type`` and ``invoice_address.transmission_info`` attributes have been added.
+
+.. versionchanged:: 2025.10
+
+   The ``tax_rounding_mode`` attribute has been added.
+
 .. _order-position-resource:
 
 Order position resource
@@ -349,6 +363,7 @@ List of all orders
             "payment_provider": "banktransfer",
             "fees": [],
             "total": "23.00",
+            "tax_rounding_mode": "line",
             "comment": "",
             "custom_followup_at": null,
             "checkin_attention": false,
@@ -368,7 +383,9 @@ List of all orders
                 "state": "",
                 "internal_reference": "",
                 "vat_id": "EU123456789",
-                "vat_id_validated": false
+                "vat_id_validated": false,
+                "transmission_type": "email",
+                "transmission_info": {}
             },
             "positions": [
               {
@@ -407,6 +424,7 @@ List of all orders
                 "seat": null,
                 "checkins": [
                   {
+                    "id": 1337,
                     "list": 44,
                     "type": "entry",
                     "gate": null,
@@ -590,6 +608,7 @@ Fetching individual orders
         "payment_provider": "banktransfer",
         "fees": [],
         "total": "23.00",
+        "tax_rounding_mode": "line",
         "comment": "",
         "api_meta": {},
         "custom_followup_at": null,
@@ -610,7 +629,9 @@ Fetching individual orders
             "state": "",
             "internal_reference": "",
             "vat_id": "EU123456789",
-            "vat_id_validated": false
+            "vat_id_validated": false,
+            "transmission_type": "email",
+            "transmission_info": {}
         },
         "positions": [
           {
@@ -649,6 +670,7 @@ Fetching individual orders
             "seat": null,
             "checkins": [
               {
+                "id": 1337,
                 "list": 44,
                 "type": "entry",
                 "gate": null,
@@ -996,6 +1018,7 @@ Creating orders
      provider will not be called to do anything about this (i.e. if you pass a bank account to a debit provider, *no*
      charge will be created), this is just informative in case you *handled the payment already*.
    * ``payment_date`` (optional) – Date and time of the completion of the payment.
+   * ``tax_rounding_mode`` (optional)
    * ``comment`` (optional)
    * ``custom_followup_at`` (optional)
    * ``checkin_attention`` (optional)
@@ -1015,8 +1038,10 @@ Creating orders
       * ``internal_reference``
       * ``vat_id``
       * ``vat_id_validated`` (optional) – If you need support for reverse charge (rarely the case), you need to check
-         yourself if the passed VAT ID is a valid EU VAT ID. In that case, set this to ``true``. Only valid VAT IDs will
+        yourself if the passed VAT ID is a valid EU VAT ID. In that case, set this to ``true``. Only valid VAT IDs will
-         trigger reverse charge taxation. Don't forget to set ``is_business`` as well!
+        trigger reverse charge taxation. Don't forget to set ``is_business`` as well!
+     * ``transmission_type`` (optional, defaults to ``email``)
+     * ``transmission_info`` (optional, see also :ref:`rest-transmission-types`)
 
    * ``positions``
 
@@ -1041,6 +1066,7 @@ Creating orders
       * ``valid_until`` (optional, if both ``valid_from`` and ``valid_until`` are **missing** (not ``null``) the availability will be computed from the given product)
       * ``requested_valid_from`` (optional, can be set **instead** of ``valid_from`` and ``valid_until`` to signal a user choice for the start time that may or may not be respected)
       * ``use_reusable_medium`` (optional, causes the new ticket to take over the given reusable medium, identified by its ID)
+      * ``discount`` (optional, only possible if ``price`` is set; attention: if this is set to not-``null`` on any position, automatic calculation of discounts will not run)
       * ``answers``
 
         * ``question``
@@ -1617,6 +1643,7 @@ List of all order positions
             "blocked": null,
             "checkins": [
               {
+                "id": 1337,
                 "list": 44,
                 "type": "entry",
                 "gate": null,
@@ -1745,6 +1772,7 @@ Fetching individual positions
         "seat": null,
         "checkins": [
           {
+            "id": 1337,
             "list": 44,
             "type": "entry",
             "gate": null,
@@ -1926,6 +1954,7 @@ Manipulating individual positions
 
       (Full order position resource, see above.)
 
+   :query boolean check_quotas: Whether to check quotas before committing item changes, default is ``true``
    :param organizer: The ``slug`` field of the organizer of the event
    :param event: The ``slug`` field of the event
    :param id: The ``id`` field of the order position to update
@@ -2005,6 +2034,7 @@ Manipulating individual positions
 
       (Full order position resource, see above.)
 
+   :query boolean check_quotas: Whether to check quotas before creating the new position, default is ``true``
    :param organizer: The ``slug`` field of the organizer of the event
    :param event: The ``slug`` field of the event
 
@@ -2291,6 +2321,7 @@ otherwise, such as splitting an order or changing fees.
 
       (Full order position resource, see above.)
 
+   :query boolean check_quotas: Whether to check quotas before patching or creating positions, default is ``true``
    :param organizer: The ``slug`` field of the organizer of the event
    :param event: The ``slug`` field of the event
    :param code: The ``code`` field of the order to update
@@ -2486,6 +2517,7 @@ Order payment endpoints
 
       {
         "amount": "23.00",
+        "comment": "Overpayment",
         "mark_canceled": false
       }
 

doc/api/resources/organizers.rst

@@ -19,6 +19,11 @@ name                                  string                     The organizer's
 slug                                  string                     A short form of the name, used e.g. in URLs.
 public_url                            string                     The public, customer-facing URL of the organizer, where
                                                                  the list of all events can be found (read-only).
+plugins                               list                       A list of package names of the enabled plugins for this
+                                                                 organizer. Note that most plugins are enabled on the
+                                                                 event level (or both levels). If you remove a plugin
+                                                                 that is also enabled on some events, it will
+                                                                 automatically be removed from all events as well.
 ===================================== ========================== =======================================================
 
 
@@ -53,7 +58,10 @@ Endpoints
           {
             "name": "Big Events LLC",
             "slug": "Big Events",
-            "public_url": "https://pretix.eu/bigevents/"
+            "public_url": "https://pretix.eu/bigevents/",
+            "plugins": [
+              "pretix_datev"
+            ]
           }
         ]
       }
@@ -87,7 +95,10 @@ Endpoints
       {
         "name": "Big Events LLC",
         "slug": "Big Events",
-        "public_url": "https://pretix.eu/bigevents/"
+        "public_url": "https://pretix.eu/bigevents/",
+        "plugins": [
+          "pretix_datev"
+        ]
       }
 
    :param organizer: The ``slug`` field of the organizer to fetch
@@ -95,6 +106,50 @@ Endpoints
    :statuscode 401: Authentication failure
    :statuscode 403: The requested organizer does not exist **or** you have no permission to view it.
 
+.. http:patch:: /api/v1/organizers/(organizer)/
+
+   Updates an organizer. Currently only the ``plugins`` field may be updated.
+
+   Permission required: "Can change organizer settings"
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+      PATCH /api/v1/organizers/bigevents/ HTTP/1.1
+      Host: pretix.eu
+      Accept: application/json, text/javascript
+      Content-Type: application/json
+
+      {
+        "plugins": [
+          "pretix_seating"
+        ]
+      }
+
+   **Example response**:
+
+   .. sourcecode:: http
+
+      HTTP/1.1 200 OK
+      Vary: Accept
+      Content-Type: application/json
+
+      {
+        "name": "Big Events LLC",
+        "slug": "Big Events",
+        "public_url": "https://pretix.eu/bigevents/",
+        "plugins": [
+          "pretix_seating"
+        ]
+      }
+
+   :param organizer: The ``slug`` field of the organizer to update
+   :statuscode 200: no error
+   :statuscode 400: The organizer could not be updated due to invalid submitted data.
+   :statuscode 401: Authentication failure
+   :statuscode 403: The requested organizer does not exist **or** you have no permission to update this resource.
+
 Organizer settings
 ------------------
 

doc/api/resources/quotas.rst

@@ -28,6 +28,8 @@ closed                                boolean                    Whether the quo
                                                                  field).
 release_after_exit                    boolean                    Whether the quota regains capacity as soon as some tickets
                                                                  have been scanned at an exit.
+ignore_for_event_availability         boolean                    Whether the quota is ignored when calculating the event's
+                                                                 availability of tickets.
 available                             boolean                    Whether this quota is available. Only returned if ``with_availability=true``
                                                                  is set on the request. Do not rely on this value for critical operations, it may be
                                                                  slightly out of date.
@@ -36,6 +38,10 @@ available_number                      integer                    Number of avail
                                                                  slightly out of date. ``null`` means unlimited.
 ===================================== ========================== =======================================================
 
+.. versionchanged:: 2025.7
+
+    The attribute ``ignore_for_event_availability`` has been added.
+
 Endpoints
 ---------
 
@@ -72,7 +78,8 @@ Endpoints
             "variations": [1, 4, 5, 7],
             "subevent": null,
             "close_when_sold_out": false,
-            "closed": false
+            "closed": false,
+            "ignore_for_event_availability": false
           }
         ]
       }
@@ -118,7 +125,8 @@ Endpoints
         "variations": [1, 4, 5, 7],
         "subevent": null,
         "close_when_sold_out": false,
-        "closed": false
+        "closed": false,
+        "ignore_for_event_availability": false
       }
 
    :param organizer: The ``slug`` field of the organizer to fetch
@@ -149,7 +157,8 @@ Endpoints
         "variations": [1, 4, 5, 7],
         "subevent": null,
         "close_when_sold_out": false,
-        "closed": false
+        "closed": false,
+        "ignore_for_event_availability": false
       }
 
    **Example response**:
@@ -168,7 +177,8 @@ Endpoints
         "variations": [1, 4, 5, 7],
         "subevent": null,
         "close_when_sold_out": false,
-        "closed": false
+        "closed": false,
+        "ignore_for_event_availability": false
       }
 
    :param organizer: The ``slug`` field of the organizer of the event/item to create a quota for
@@ -223,7 +233,8 @@ Endpoints
         ],
         "subevent": null,
         "close_when_sold_out": false,
-        "closed": false
+        "closed": false,
+        "ignore_for_event_availability": false
       }
 
    :param organizer: The ``slug`` field of the organizer to modify

doc/api/resources/vouchers.rst

@@ -14,6 +14,7 @@ The voucher resource contains the following public fields:
 Field                                 Type                       Description
 ===================================== ========================== =======================================================
 id                                    integer                    Internal ID of the voucher
+created                               datetime                   The creation date of the voucher. For vouchers created before pretix 2025.7.0, this is guessed retroactively and might not be accurate.
 code                                  string                     The voucher code that is required to redeem the voucher
 max_usages                            integer                    The maximum number of times this voucher can be
                                                                  redeemed (default: 1).
@@ -49,8 +50,14 @@ subevent                              integer                    ID of the date
 show_hidden_items                     boolean                    Only if set to ``true``, this voucher allows to buy products with the property ``hide_without_voucher``. Defaults to ``true``.
 all_addons_included                   boolean                    If set to ``true``, all add-on products for the product purchased with this voucher are included in the base price.
 all_bundles_included                  boolean                    If set to ``true``, all bundled products for the product purchased with this voucher are added without their designated price.
+budget                                money (string)             The budget a voucher is allowed to consume before being used up (or ``null``)
+budget_used                           money (string)             The amount of budget the voucher has already used up.
 ===================================== ========================== =======================================================
 
+.. versionchanged:: 2025.7
+
+    The attributes ``created``, ``budget``, and ``budget_used`` have been added.
+
 
 Endpoints
 ---------
@@ -82,6 +89,7 @@ Endpoints
         "results": [
           {
             "id": 1,
+            "created": "2020-09-18T14:17:40.971519Z",
             "code": "43K6LKM37FBVR2YG",
             "max_usages": 1,
             "redeemed": 0,
@@ -99,7 +107,9 @@ Endpoints
             "subevent": null,
             "show_hidden_items": false,
             "all_addons_included": false,
-            "all_bundles_included": false
+            "all_bundles_included": false,
+            "budget": None,
+            "budget_used": "0.00"
           }
         ]
       }
@@ -152,6 +162,7 @@ Endpoints
 
       {
         "id": 1,
+        "created": "2020-09-18T14:17:40.971519Z",
         "code": "43K6LKM37FBVR2YG",
         "max_usages": 1,
         "redeemed": 0,
@@ -169,7 +180,9 @@ Endpoints
         "subevent": null,
         "show_hidden_items": false,
         "all_addons_included": false,
-        "all_bundles_included": false
+        "all_bundles_included": false,
+        "budget": None,
+        "budget_used": "0.00"
       }
 
    :param organizer: The ``slug`` field of the organizer to fetch
@@ -222,6 +235,7 @@ Endpoints
 
       {
         "id": 1,
+        "created": "2020-09-18T14:17:40.971519Z",
         "code": "43K6LKM37FBVR2YG",
         "max_usages": 1,
         "redeemed": 0,
@@ -239,7 +253,9 @@ Endpoints
         "subevent": null,
         "show_hidden_items": false,
         "all_addons_included": false,
-        "all_bundles_included": false
+        "all_bundles_included": false,
+        "budget": None,
+        "budget_used": "0.00"
       }
 
    :param organizer: The ``slug`` field of the organizer to create a voucher for
@@ -313,6 +329,7 @@ Endpoints
       [
         {
           "id": 1,
+          "created": "2020-09-18T14:17:40.971519Z",
           "code": "43K6LKM37FBVR2YG",
           …
         }, …
@@ -359,6 +376,7 @@ Endpoints
 
       {
         "id": 1,
+        "created": "2020-09-18T14:17:40.971519Z",
         "code": "43K6LKM37FBVR2YG",
         "max_usages": 1,
         "redeemed": 0,
@@ -376,7 +394,9 @@ Endpoints
         "subevent": null,
         "show_hidden_items": false,
         "all_addons_included": false,
-        "all_bundles_included": false
+        "all_bundles_included": false,
+        "budget": None,
+        "budget_used": "0.00"
       }
 
    :param organizer: The ``slug`` field of the organizer to modify

doc/api/resources/webhooks.rst

@@ -60,6 +60,9 @@ The following values for ``action_types`` are valid with pretix core:
     * ``pretix.event.added``
     * ``pretix.event.changed``
     * ``pretix.event.deleted``
+    * ``pretix.voucher.added``
+    * ``pretix.voucher.changed``
+    * ``pretix.voucher.deleted``
     * ``pretix.subevent.added``
     * ``pretix.subevent.changed``
     * ``pretix.subevent.deleted``

doc/development/algorithms/pricing.rst

@@ -178,3 +178,124 @@ Flowchart
 ---------
 
 .. image:: /images/cart_pricing.png
+
+
+.. _`algorithms-rounding`:
+
+Rounding of taxes
+-----------------
+
+pretix internally always stores taxes on a per-line level, like this:
+
+ ========== ========== =========== ======= =============
+   Product   Tax rate   Net price     Tax   Gross price
+ ========== ========== =========== ======= =============
+  Ticket A       19 %       84.03   15.97        100.00
+  Ticket B       19 %       84.03   15.97        100.00
+  Ticket C       19 %       84.03   15.97        100.00
+  Ticket D       19 %       84.03   15.97        100.00
+  Ticket E       19 %       84.03   15.97        100.00
+       Sum                 420.15   79.85        500.00
+ ========== ========== =========== ======= =============
+
+Whether the net price is computed from the gross price or vice versa is configured on the tax rule and may differ for every line.
+
+The line-based computation has a few significant advantages:
+
+- We can report both net and gross prices for every individual ticket.
+
+- We can report both net and gross prices for every filter imaginable, such as the gross sum of all sales of Ticket A
+  or the net sum of all sales for a specific date in an event series. All numbers will be exact.
+
+- When splitting the order into two, both net price and gross price are split without any changes in rounding.
+
+The main disadvantage is that the tax looks "wrong" when computed from the sum. Taking the sum of net prices (420.15)
+and multiplying it with the tax rate (19%) yields a tax amount of 79.83 (instead of 79.85) and a gross sum of 499.98
+(instead of 499.98). This becomes a problem when juristictions, data formats, or external systems expect this calculation
+to work on the level of the entire order. A prominent example is the EN 16931 standard for e-invoicing that
+does not allow the computation as created by pretix.
+
+However, calculating the tax rate from the net total has significant disadvantages:
+
+- It is impossible to guarantee a stable gross price this way, i.e. if you advertise a price of €100 per ticket to
+  consumers, they will be confused when they only need to pay €499.98 for 5 tickets.
+
+- Some prices are impossible, e.g. you cannot sell a ticket for a gross price of €99.99 at a 19% tax rate, since there
+  is no two-decimal net price that would be computed to a gross price of €99.99.
+
+- When splitting an order into two, the combined of the new orders is not guaranteed to be the same as the total of the
+  original order. Therefore, additional payments or refunds of very small amounts might be necessary.
+
+To allow organizers to make their own choices on this matter, pretix provides the following options:
+
+Compute taxes for every line individually
+"""""""""""""""""""""""""""""""""""""""""
+
+Algorithm identifier: ``line``
+
+This is our original algorithm where the tax value is rounded for every line individually.
+
+**This is our current default algorithm and we recommend it whenever you do not have different requirements** (see below).
+For the example above:
+
+ ========== ========== =========== ======= =============
+   Product   Tax rate   Net price     Tax   Gross price
+ ========== ========== =========== ======= =============
+  Ticket A       19 %       84.03   15.97        100.00
+  Ticket B       19 %       84.03   15.97        100.00
+  Ticket C       19 %       84.03   15.97        100.00
+  Ticket D       19 %       84.03   15.97        100.00
+  Ticket E       19 %       84.03   15.97        100.00
+       Sum                 420.15   79.85        500.00
+ ========== ========== =========== ======= =============
+
+
+Compute taxes based on net total
+""""""""""""""""""""""""""""""""
+
+Algorithm identifier: ``sum_by_net``
+
+In this algorithm, the tax value and gross total are computed from the sum of the net prices. To accomplish this within
+our data model, the gross price and tax of some of the tickets will be changed by the minimum currency unit (e.g. €0.01).
+The net price of the tickets always stay the same.
+
+**This is the algorithm intended by EN 16931 invoices and our recommendation to use for e-invoicing when (primarily) business customers are involved.**
+
+The main downside is that it might be confusing when selling to consumers, since the amounts to be paid change in unexpected ways.
+For the example above, the customer expects to pay 5 times 100.00, but they are are in fact charged 499.98:
+
+ ========== ========== =========== ============================== ==============================
+   Product   Tax rate   Net price                            Tax                    Gross price
+ ========== ========== =========== ============================== ==============================
+  Ticket A       19 %       84.03   15.96 (incl. -0.01 rounding)   99.99 (incl. -0.01 rounding)
+  Ticket B       19 %       84.03   15.96 (incl. -0.01 rounding)   99.99 (incl. -0.01 rounding)
+  Ticket C       19 %       84.03                          15.97                         100.00
+  Ticket D       19 %       84.03                          15.97                         100.00
+  Ticket E       19 %       84.03                          15.97                         100.00
+       Sum                 420.15                          78.83                         499.98
+ ========== ========== =========== ============================== ==============================
+
+Compute taxes based on net total with stable gross prices
+"""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+
+Algorithm identifier: ``sum_by_net_keep_gross``
+
+In this algorithm, the tax value and gross total are computed from the sum of the net prices. However, the net prices
+of some of the tickets will be changed automatically by the minimum currency unit (e.g. €0.01) such that the resulting
+gross prices stay the same.
+
+**This is less confusing to consumers and the end result is still compliant to EN 16931, so we recommend this for e-invoicing when (primarily) consumers are involved.**
+
+The main downside is that it might be confusing when selling to business customers, since the prices of the identical tickets appear to be different.
+Full computation for the example above:
+
+ ========== ========== ============================= ============================== =============
+   Product   Tax rate                     Net price                            Tax   Gross price
+ ========== ========== ============================= ============================== =============
+  Ticket A       19 %   84.04 (incl. 0.01 rounding)   15.96 (incl. -0.01 rounding)        100.00
+  Ticket B       19 %   84.04 (incl. 0.01 rounding)   15.96 (incl. -0.01 rounding)        100.00
+  Ticket C       19 %                         84.03                          15.97        100.00
+  Ticket D       19 %                         84.03                          15.97        100.00
+  Ticket E       19 %                         84.03                          15.97        100.00
+       Sum                                   420.17                          79.83        500.00
+ ========== ========== ============================= ============================== =============

doc/development/api/datasync.rst

@@ -0,0 +1,207 @@
+.. highlight:: python
+   :linenothreshold: 5
+
+Data sync providers
+===================
+
+.. warning:: This feature is considered **experimental**. It might change at any time without prior notice.
+
+pretix provides connectivity to many external services through plugins. A common requirement
+is unidirectionally sending (order, customer, ticket, ...) data into external systems.
+The transfer is usually triggered by signals provided by pretix core (e.g. :data:`order_placed`),
+but performed asynchronously.
+
+Such plugins should use the :class:`OutboundSyncProvider` API to utilize the queueing, retry and mapping 
+mechanisms as well as the user interface for configuration and monitoring. Sync providers are registered 
+in the :py:attr:`pretix.base.datasync.datasync.datasync_providers` :ref:`registry <registries>`.
+
+An :class:`OutboundSyncProvider` for subscribing event participants to a mailing list could start
+like this, for example:
+
+.. code-block:: python
+
+    from pretix.base.datasync.datasync import (OutboundSyncProvider, datasync_providers)
+
+    @datasync_providers.register
+    class MyListSyncProvider(OutboundSyncProvider):
+        identifier = "my_list"
+        display_name = "My Mailing List Service"
+        # ...
+
+
+The plugin must register listeners in `signals.py` for all signals that should to trigger a sync and
+within it has to call :meth:`MyListSyncProvider.enqueue_order` to enqueue the order for synchronization:
+
+.. code-block:: python
+
+    @receiver(order_placed, dispatch_uid="mylist_order_placed")
+    def on_order_placed(sender, order, **kwargs):
+        MyListSyncProvider.enqueue_order(order, "order_placed")
+
+
+Property mappings
+-----------------
+
+Most of these plugins need to translate data from some pretix objects (e.g. orders)
+into an external system's data structures. Sometimes, there is only one reasonable way or the
+plugin author makes an opinionated decision what information from which objects should be
+transferred into which data structures in the external system.
+
+Otherwise, you can use a :class:`PropertyMappingFormSet` to let the user set up a mapping from pretix model fields
+to external data fields. You could store the mapping information either in the event settings, or in a separate
+data model. Your implementation of :attr:`OutboundSyncProvider.mappings`
+needs to provide a list of mappings, which can be e.g. static objects or model instances, as long as they
+have at least the properties defined in
+:class:`pretix.base.datasync.datasync.StaticMapping`.
+
+.. code-block:: python
+
+    # class MyListSyncProvider, contd.
+        def mappings(self):
+            return [
+                StaticMapping(
+                    id=1, pretix_model='Order', external_object_type='Contact',
+                    pretix_id_field='email', external_id_field='email',
+                    property_mappings=self.event.settings.mylist_order_mapping,
+                ))
+            ]
+
+
+Currently, we support `orders` and `order positions` as data sources, with the data fields defined in
+:func:`pretix.base.datasync.sourcefields.get_data_fields`.
+
+To perform the actual sync, implement :func:`sync_object_with_properties` and optionally
+:func:`finalize_sync_order`. The former is called for each object to be created according to the ``mappings``.
+For each order that was enqueued using :func:`enqueue_order`:
+
+- each Mapping with ``pretix_model == "Order"`` results in one call to :func:`sync_object_with_properties`,
+- each Mapping with ``pretix_model == "OrderPosition"`` results in one call to
+  :func:`sync_object_with_properties` per order position,
+- :func:`finalize_sync_order` is called one time after all calls to :func:`sync_object_with_properties`.
+
+
+Implementation examples
+-----------------------
+
+For example implementations, see the test cases in :mod:`tests.base.test_datasync`.
+
+In :class:`SimpleOrderSync`, a basic data transfer of order data only is
+shown. Therein, a ``sync_object_with_properties`` method is defined as follows:
+
+.. code-block:: python
+
+    from pretix.base.datasync.utils import assign_properties
+
+    # class MyListSyncProvider, contd.
+    def sync_object_with_properties(
+            self, external_id_field, id_value, properties: list, inputs: dict,
+            mapping, mapped_objects: dict, **kwargs,
+    ):
+        # First, we query the external service if our object-to-sync already exists there.
+        # This is necessary to make sure our method is idempotent, i.e. handles already synced
+        # data gracefully.
+        pre_existing_object = self.fake_api_client.retrieve_object(
+            mapping.external_object_type,
+            external_id_field,
+            id_value
+        )
+
+        # We use the helper function ``assign_properties`` to update a pre-existing object.
+        update_values = assign_properties(
+            new_values=properties,
+            old_values=pre_existing_object or {},
+            is_new=pre_existing_object is None,
+            list_sep=";",
+        )
+
+        # Then we can send our new data to the external service. The specifics of course depends
+        # on your API, e.g. you may need to use different endpoints for creating or updating an
+        # object, or pass the identifier separately instead of in the same dictionary as the
+        # other properties.
+        result = self.fake_api_client.create_or_update_object(mapping.external_object_type, {
+            **update_values,
+            external_id_field: id_value,
+            "_id": pre_existing_object and pre_existing_object.get("_id"),
+        })
+
+        # Finally, return a dictionary containing at least `object_type`, `external_id_field`,
+        # `id_value`, `external_link_href`, and `external_link_display_name` keys.
+        # Further keys may be provided for your internal use. This dictionary is provided
+        # in following calls in the ``mapped_objects`` dict, to allow creating associations
+        # to this object.
+        return {
+            "object_type": mapping.external_object_type,
+            "external_id_field": external_id_field,
+            "id_value": id_value,
+            "external_link_href": f"https://example.org/external-system/{mapping.external_object_type}/{id_value}/",
+            "external_link_display_name": f"Contact #{id_value} - Jane Doe",
+            "my_result": result,
+        }
+
+.. note:: The result dictionaries of earlier invocations of :func:`sync_object_with_properties` are
+          only provided in subsequent calls of the same sync run, such that a mapping can
+          refer to e.g. the external id of an object created by a preceding mapping.
+          However, the result dictionaries are currently not provided across runs. This will
+          likely change in a future revision of this API, to allow easier integration of external
+          systems that do not allow retrieving/updating data by a pretix-provided key.
+
+``mapped_objects`` is a dictionary of lists of dictionaries. The keys to the dictionary are
+the mapping identifiers (``mapping.id``), the lists contain the result dictionaries returned
+by :func:`sync_object_with_properties`.
+
+
+In :class:`OrderAndTicketAssociationSync`, an example is given where orders, order positions,
+and the association between them are transferred.
+
+
+The OutboundSyncProvider base class
+-----------------------------------
+
+.. autoclass:: pretix.base.datasync.datasync.OutboundSyncProvider
+   :members:
+
+
+Property mapping format
+-----------------------
+
+To allow the user to configure property mappings, you can use the PropertyMappingFormSet,
+which will generate the required ``property_mappings`` value automatically. If you need
+to specify the property mappings programmatically, you can refer to the description below
+on their format.
+
+.. autoclass:: pretix.control.forms.mapping.PropertyMappingFormSet
+   :members: to_property_mappings_json
+
+A simple JSON-serialized ``property_mappings`` list for mapping some order information can look like this:
+
+.. code-block:: json
+
+      [
+        {
+            "pretix_field": "email",
+            "external_field": "orderemail",
+            "value_map": "",
+            "overwrite": "overwrite",
+        },
+        {
+            "pretix_field": "order_status",
+            "external_field": "status",
+            "value_map": "{\"n\": \"pending\", \"p\": \"paid\", \"e\": \"expired\", \"c\": \"canceled\", \"r\": \"refunded\"}",
+            "overwrite": "overwrite",
+        },
+        {
+            "pretix_field": "order_total",
+            "external_field": "total",
+            "value_map": "",
+            "overwrite": "overwrite",
+        }
+      ]
+
+
+Translating mappings on Event copy
+----------------------------------
+
+Property mappings can contain references to event-specific primary keys. Therefore, plugins must register to the
+event_copy_data signal and call translate_property_mappings on all property mappings they store.
+
+.. autofunction:: pretix.base.datasync.utils.translate_property_mappings

doc/development/api/general.rst

@@ -23,21 +23,21 @@ There are multiple signals that will be sent out in the ordering cycle:
 
 .. automodule:: pretix.base.signals
    :no-index:
-   :members: validate_cart, validate_cart_addons, validate_order, order_valid_if_pending, order_fee_calculation, order_paid, order_placed, order_canceled, order_reactivated, order_expired, order_expiry_changed, order_modified, order_changed, order_approved, order_denied, order_fee_type_name, allow_ticket_download, order_split, order_gracefully_delete, invoice_line_text
+   :members: validate_cart, validate_cart_addons, validate_order, order_valid_if_pending, order_fee_calculation, order_paid, order_placed, order_canceled, order_reactivated, order_expired, order_expiry_changed, order_modified, order_changed, order_approved, order_denied, order_fee_type_name, allow_ticket_download, order_split, order_gracefully_delete, build_invoice_data, invoice_line_text
 
 Check-ins
 """""""""
 
 .. automodule:: pretix.base.signals
    :no-index:
-   :members: checkin_created
+   :members: checkin_created, checkin_annulled
 
 
 Frontend
 --------
 
 .. automodule:: pretix.presale.signals
-   :members: html_head, html_footer, footer_link, global_footer_link, front_page_top, front_page_bottom, front_page_bottom_widget, fee_calculation_for_cart, contact_form_fields, question_form_fields, contact_form_fields_overrides, question_form_fields_overrides, checkout_confirm_messages, checkout_confirm_page_content, checkout_all_optional, html_page_header, render_seating_plan, checkout_flow_steps, position_info, position_info_top, item_description, global_html_head, global_html_footer, global_html_page_header, seatingframe_html_head
+   :members: html_head, html_footer, footer_link, global_footer_link, front_page_top, front_page_bottom, front_page_bottom_widget, fee_calculation_for_cart, contact_form_fields, question_form_fields, contact_form_fields_overrides, question_form_fields_overrides, checkout_confirm_messages, checkout_confirm_page_content, checkout_all_optional, html_page_header, render_seating_plan, checkout_flow_steps, position_info, position_info_top, item_description, global_html_head, global_html_footer, global_html_page_header, seatingframe_html_head, filter_subevents
 
 
 .. automodule:: pretix.presale.signals

doc/development/api/index.rst

@@ -13,10 +13,12 @@ Contents:
    email
    placeholder
    invoice
+   invoicetransmission
    shredder
    import
    customview
    cookieconsent
    auth
+   datasync
    general
    quality

doc/development/api/invoicetransmission.rst

@@ -0,0 +1,65 @@
+.. highlight:: python
+   :linenothreshold: 5
+
+Writing an invoice transmission plugin
+======================================
+
+An invoice transmission provider transports an invoice from the sender to the recipient.
+There are pre-defined types of invoice transmission in pretix, currently ``"email"``, ``"peppol"``, and ``"it_sdi"``.
+You can find more information about them at :ref:`rest-transmission-types`.
+
+New transmission types can not be added by plugins but need to be added to pretix itself.
+However, plugins can provide implementations for the actual transmission.
+Please read :ref:`Creating a plugin <pluginsetup>` first, if you haven't already.
+
+Output registration
+-------------------
+
+New invoice transmission providers can be registered through the :ref:`registry <registries>` mechanism
+
+.. code-block:: python
+
+   from pretix.base.invoicing.transmission import transmission_providers, TransmissionProvider
+
+   @transmission_providers.new()
+   class SdiTransmissionProvider(TransmissionProvider):
+       identifier = "fatturapa_providerabc"
+       type = "it_sdi"
+       verbose_name = _("FatturaPA through provider ABC")
+       ...
+
+
+The provider class
+------------------
+
+.. class:: pretix.base.invoicing.transmission.TransmissionProvider
+
+   .. autoattribute:: identifier
+
+      This is an abstract attribute, you **must** override this!
+
+   .. autoattribute:: type
+
+      This is an abstract attribute, you **must** override this!
+
+   .. autoattribute:: verbose_name
+
+      This is an abstract attribute, you **must** override this!
+
+   .. autoattribute:: priority
+
+   .. autoattribute:: testmode_supported
+
+   .. automethod:: is_ready
+
+      This is an abstract method, you **must** override this!
+
+   .. automethod:: is_available
+
+      This is an abstract method, you **must** override this!
+
+   .. automethod:: transmit
+
+      This is an abstract method, you **must** override this!
+
+   .. automethod:: settings_url

doc/development/api/plugins.rst

@@ -56,6 +56,20 @@ restricted         boolean (optional)   ``False`` by default, restricts a plugin
                                         for an event by system administrators / superusers.
 experimental       boolean (optional)   ``False`` by default, marks a plugin as an experimental feature in the plugins list.
 compatibility      string               Specifier for compatible pretix versions.
+level              string               System level the plugin can be activated at.
+                                        Set to ``pretix.base.plugins.PLUGIN_LEVEL_EVENT`` for plugins that can be activated
+                                        at event level and then be active for that event only.
+                                        Set to ``pretix.base.plugins.PLUGIN_LEVEL_ORGANIZER`` for plugins that can be
+                                        activated only for the organizer as a whole and are active for any event within
+                                        that organizer.
+                                        Set to ``pretix.base.plugins.PLUGIN_LEVEL_EVENT_ORGANIZER_HYBRID`` for plugins that
+                                        can be activated at organizer level but are considered active only within events
+                                        for which they have also been specifically activated.
+                                        More levels, e.g. user-level plugins, might be invented in the future.
+settings_links     list                 List of ``((menu name, submenu name, …), urlname, url_kwargs)`` tuples that point
+                                        to the plugin's settings.
+navigation_links   list                 List of ``((menu name, submenu name, …), urlname, url_kwargs)`` tuples that point
+                                        to the plugin's system pages.
 ================== ==================== ===========================================================
 
 A working example would be:
@@ -63,9 +77,9 @@ A working example would be:
 .. code-block:: python
 
     try:
-        from pretix.base.plugins import PluginConfig
+        from pretix.base.plugins import PluginConfig, PLUGIN_LEVEL_EVENT
     except ImportError:
-        raise RuntimeError("Please use pretix 2.7 or above to run this plugin!")
+        raise RuntimeError("Please use pretix 2025.7 or above to run this plugin!")
     from django.utils.translation import gettext_lazy as _
 
 
@@ -79,6 +93,7 @@ A working example would be:
             version = '1.0.0'
             category = 'PAYMENT'
             picture = 'pretix_paypal/paypal_logo.svg'
+            level = PLUGIN_LEVEL_EVENT
             visible = True
             featured = False
             restricted = False
@@ -142,14 +157,14 @@ method to make your receivers available:
             from . import signals  # NOQA
 
 You can optionally specify code that is executed when your plugin is activated for an event
-in the ``installed`` method:
+or organizer in the ``installed`` method:
 
 .. code-block:: python
 
     class PaypalApp(AppConfig):
         …
 
-        def installed(self, event):
+        def installed(self, event_or_organizer):
             pass  # Your code here
 
 

doc/development/setup.rst

@@ -5,7 +5,7 @@ Development setup
 
 This tutorial helps you to get started hacking with pretix on your own computer. You need this to
 be able to contribute to pretix, but it might also be helpful if you want to write your own plugins.
-If you want to install pretix on a server for actual usage, go to the [administrator documentation](https://docs.pretix.eu/self-hosting/) instead.
+If you want to install pretix on a server for actual usage, go to the `administrator documentation`_ instead.
 
 Obtain a copy of the source code
 --------------------------------
@@ -221,3 +221,4 @@ your virtual environment.::
 
 .. _Django's documentation: https://docs.djangoproject.com/en/1.11/ref/django-admin/#runserver
 .. _pretixdroid: https://github.com/pretix/pretixdroid
+.. _administrator documentation: https://docs.pretix.eu/self-hosting/

doc/images/cart_pricing.puml

@@ -23,6 +23,7 @@ partition "For every cart position" {
     --> "Store as line_price (gross), tax_rate"
 }
 --> "Apply discount engine"
+--> "Apply tax rounding"
 --> "Store as price (gross)"
 
 @enduml

doc/requirements.rtd.txt

@@ -6,4 +6,4 @@ sphinxcontrib-images
 sphinxcontrib-jquery
 sphinxcontrib-spelling==8.*
 sphinxemoji
-pyenchant==3.2.*
+pyenchant==3.3.*

doc/requirements.txt

@@ -7,4 +7,4 @@ sphinxcontrib-images
 sphinxcontrib-jquery
 sphinxcontrib-spelling==8.*
 sphinxemoji
-pyenchant==3.2.*
+pyenchant==3.3.*

pyproject.toml

@@ -28,23 +28,23 @@ classifiers = [
 dependencies = [
   "arabic-reshaper==3.0.0",  # Support for Arabic in reportlab
   "babel",
-  "BeautifulSoup4==4.13.*",
+  "BeautifulSoup4==4.14.*",
   "bleach==6.2.*",
   "celery==5.5.*",
   "chardet==5.2.*",
   "cryptography>=44.0.0",
-  "css-inline==0.15.*",
+  "css-inline==0.17.*",
   "defusedcsv>=1.1.0",
-  "Django[argon2]==4.2.*,>=4.2.15",
+  "Django[argon2]==4.2.*,>=4.2.24",
-  "django-bootstrap3==25.1",
+  "django-bootstrap3==25.2",
   "django-compressor==4.5.1",
   "django-countries==7.6.*",
   "django-filter==25.1",
-  "django-formset-js-improved==0.5.0.3",
+  "django-formset-js-improved==0.5.0.4",
   "django-formtools==2.5.1",
-  "django-hierarkey==1.2.*",
+  "django-hierarkey==2.0.*,>=2.0.1",
   "django-hijack==3.7.*",
-  "django-i18nfield==1.10.*",
+  "django-i18nfield==1.11.*",
   "django-libsass==0.9",
   "django-localflavor==5.0",
   "django-markup",
@@ -64,7 +64,7 @@ dependencies = [
   "kombu==5.5.*",
   "libsass==0.23.*",
   "lxml",
-  "markdown==3.8.2",  # 3.3.5 requires importlib-metadata>=4.4, but django-bootstrap3 requires importlib-metadata<3.
+  "markdown==3.9",  # 3.3.5 requires importlib-metadata>=4.4, but django-bootstrap3 requires importlib-metadata<3.
   # We can upgrade markdown again once django-bootstrap3 upgrades or once we drop Python 3.6 and 3.7
   "mt-940==4.30.*",
   "oauthlib==3.3.*",
@@ -76,23 +76,23 @@ dependencies = [
   "phonenumberslite==9.0.*",
   "Pillow==11.3.*",
   "pretix-plugin-build",
-  "protobuf==6.31.*",
+  "protobuf==6.33.*",
   "psycopg2-binary",
   "pycountry",
-  "pycparser==2.22",
+  "pycparser==2.23",
   "pycryptodome==3.23.*",
-  "pypdf==5.7.*",
+  "pypdf==6.1.*",
   "python-bidi==0.6.*",  # Support for Arabic in reportlab
   "python-dateutil==2.9.*",
   "pytz",
   "pytz-deprecation-shim==0.1.*",
   "pyuca",
   "qrcode==8.2",
-  "redis==6.2.*",
+  "redis==6.4.*",
   "reportlab==4.4.*",
-  "requests==2.31.*",
+  "requests==2.32.*",
-  "sentry-sdk==2.31.*",
+  "sentry-sdk==2.43.*",
-  "sepaxml==2.6.*",
+  "sepaxml==2.7.*",
   "stripe==7.9.*",
   "text-unidecode==1.*",
   "tlds>=2020041600",
@@ -100,27 +100,27 @@ dependencies = [
   "ua-parser==1.0.*",
   "vat_moss_forked==2020.3.20.0.11.0",
   "vobject==0.9.*",
-  "webauthn==2.6.*",
+  "webauthn==2.7.*",
   "zeep==4.3.*"
 ]
 
 [project.optional-dependencies]
 memcached = ["pylibmc"]
 dev = [
-  "aiohttp==3.12.*",
+  "aiohttp==3.13.*",
   "coverage",
   "coveralls",
-  "fakeredis==2.30.*",
+  "fakeredis==2.32.*",
   "flake8==7.3.*",
   "freezegun",
-  "isort==6.0.*",
+  "isort==6.1.*",
   "pep8-naming==0.15.*",
   "potypo",
   "pytest-asyncio>=0.24",
   "pytest-cache",
   "pytest-cov",
   "pytest-django==4.*",
-  "pytest-mock==3.14.*",
+  "pytest-mock==3.15.*",
   "pytest-sugar",
   "pytest-xdist==3.8.*",
   "pytest==8.4.*",

src/Makefile

@@ -25,8 +25,8 @@ coverage:
 	coverage run -m py.test
 
 npminstall:
-	# keep this in sync with setup.py!
+	# keep this in sync with pretix/_build.py!
 	mkdir -p pretix/static.dist/node_prefix/
 	cp -r pretix/static/npm_dir/* pretix/static.dist/node_prefix/
-	npm install --prefix=pretix/static.dist/node_prefix
+	npm ci --prefix=pretix/static.dist/node_prefix
 

src/manage.py

@@ -2,8 +2,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/__init__.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.
@@ -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__ = "2025.7.0.dev0"
+__version__ = "2025.10.0.dev0"

src/pretix/__main__.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/_base_settings.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.
@@ -115,6 +115,7 @@ ALL_LANGUAGES = [
     ('sk', _('Slovak')),
     ('sv', _('Swedish')),
     ('es', _('Spanish')),
+    ('es-419', _('Spanish (Latin America)')),
     ('tr', _('Turkish')),
     ('uk', _('Ukrainian')),
 ]
@@ -172,6 +173,12 @@ EXTRA_LANG_INFO = {
         'name': 'Norwegian Bokmal',
         'name_local': 'norsk (bokmål)',
     },
+    'es-419': {
+        'bidi': False,
+        'code': 'es-419',
+        'name': 'Spanish (Latin America)',
+        'name_local': 'Español',
+    },
 }
 
 django.conf.locale.LANG_INFO.update(EXTRA_LANG_INFO)

src/pretix/_build.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.
@@ -39,7 +39,7 @@ def npm_install():
         node_prefix = os.path.join(here, 'static.dist', 'node_prefix')
         os.makedirs(node_prefix, exist_ok=True)
         shutil.copytree(os.path.join(here, 'static', 'npm_dir'), node_prefix, dirs_exist_ok=True)
-        subprocess.check_call('npm install', shell=True, cwd=node_prefix)
+        subprocess.check_call('npm ci', shell=True, cwd=node_prefix)
         npm_installed = True
 
 

src/pretix/_build_settings.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/api/__init__.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/api/apps.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/api/auth/__init__.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/api/auth/device.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/api/auth/devicesecurity.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/api/auth/permission.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/api/auth/session.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/api/auth/token.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/api/exception.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/api/filters.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/api/middleware.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/api/models.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/api/oauth.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/api/pagination.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/api/serializers/__init__.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/api/serializers/cart.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/api/serializers/checkin.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.
@@ -104,3 +104,14 @@ class MiniCheckinListSerializer(I18nAwareModelSerializer):
 
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
+
+
+class CheckinRPCAnnulInputSerializer(serializers.Serializer):
+    lists = serializers.PrimaryKeyRelatedField(required=True, many=True, queryset=CheckinList.objects.none())
+    nonce = serializers.CharField(required=True, allow_null=False)
+    datetime = serializers.DateTimeField(required=False, allow_null=True)
+    error_explanation = serializers.CharField(required=False, allow_null=True)
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.fields['lists'].child_relation.queryset = CheckinList.objects.filter(event__in=self.context['events']).select_related('event')

src/pretix/api/serializers/discount.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/api/serializers/event.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.
@@ -50,6 +50,7 @@ from rest_framework.relations import SlugRelatedField
 from pretix.api.serializers import (
     CompatibleJSONField, SalesChannelMigrationMixin,
 )
+from pretix.api.serializers.fields import PluginsField
 from pretix.api.serializers.i18n import I18nAwareModelSerializer
 from pretix.api.serializers.settings import SettingsSerializer
 from pretix.base.models import (
@@ -61,6 +62,9 @@ from pretix.base.models.items import (
     ItemMetaProperty, SubEventItem, SubEventItemVariation,
 )
 from pretix.base.models.tax import CustomRulesValidator
+from pretix.base.plugins import (
+    PLUGIN_LEVEL_EVENT, PLUGIN_LEVEL_EVENT_ORGANIZER_HYBRID,
+)
 from pretix.base.services.seating import (
     SeatProtected, generate_seats, validate_plan_change,
 )
@@ -126,22 +130,6 @@ class SeatCategoryMappingField(Field):
         }
 
 
-class PluginsField(Field):
-
-    def to_representation(self, obj):
-        from pretix.base.plugins import get_all_plugins
-
-        return sorted([
-            p.module for p in get_all_plugins()
-            if not p.name.startswith('.') and getattr(p, 'visible', True) and p.module in obj.get_plugins()
-        ])
-
-    def to_internal_value(self, data):
-        return {
-            'plugins': data
-        }
-
-
 class TimeZoneField(ChoiceField):
     def get_attribute(self, instance):
         return instance.cache.get_or_set(
@@ -283,17 +271,28 @@ class EventSerializer(SalesChannelMigrationMixin, I18nAwareModelSerializer):
         from pretix.base.plugins import get_all_plugins
 
         plugins_available = {
-            p.module: p for p in get_all_plugins(self.instance)
+            p.module: p for p in get_all_plugins(event=self.instance)
             if not p.name.startswith('.') and getattr(p, 'visible', True)
         }
+        current_plugins = self.instance.get_plugins() if self.instance and self.instance.pk else []
         settings_holder = self.instance if self.instance and self.instance.pk else self.context['organizer']
 
+        allowed_levels = (PLUGIN_LEVEL_EVENT, PLUGIN_LEVEL_EVENT_ORGANIZER_HYBRID)
         for plugin in value.get('plugins'):
             if plugin not in plugins_available:
                 raise ValidationError(_('Unknown plugin: \'{name}\'.').format(name=plugin))
             if getattr(plugins_available[plugin], 'restricted', False):
                 if plugin not in settings_holder.settings.allowed_restricted_plugins:
                     raise ValidationError(_('Restricted plugin: \'{name}\'.').format(name=plugin))
+            level = getattr(plugins_available[plugin], 'level', PLUGIN_LEVEL_EVENT)
+            if level not in allowed_levels:
+                raise ValidationError('Plugin cannot be enabled on this level: \'{name}\'.'.format(name=plugin))
+
+            if level == PLUGIN_LEVEL_EVENT_ORGANIZER_HYBRID and plugin not in self.context['organizer'].get_plugins():
+                if plugin not in current_plugins:
+                    # Technically, this is allowed, but consumers might be confused if the API call doesn't do anything
+                    # so we prevent this change.
+                    raise ValidationError('Plugin should be enabled on organizer level first: \'{name}\'.'.format(name=plugin))
 
         return value
 
@@ -806,6 +805,7 @@ class EventSettingsSerializer(SettingsSerializer):
         'invoice_reissue_after_modify',
         'invoice_include_free',
         'invoice_generate',
+        'invoice_period',
         'invoice_numbers_consecutive',
         'invoice_numbers_prefix',
         'invoice_numbers_prefix_cancellations',
@@ -829,6 +829,7 @@ class EventSettingsSerializer(SettingsSerializer):
         'invoice_eu_currencies',
         'invoice_logo_image',
         'invoice_renderer_highlight_order_code',
+        'tax_rounding',
         'cancel_allow_user',
         'cancel_allow_user_until',
         'cancel_allow_user_unpaid_keep',

src/pretix/api/serializers/exporters.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.
@@ -19,45 +19,16 @@
 # 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 django import forms
 from django.conf import settings
 from django.http import QueryDict
 from pytz import common_timezones
 from rest_framework import serializers
 from rest_framework.exceptions import ValidationError
 
+from pretix.api.serializers.forms import form_field_to_serializer_field
 from pretix.base.exporter import OrganizerLevelExportMixin
 from pretix.base.models import ScheduledEventExport, ScheduledOrganizerExport
-from pretix.base.timeframes import DateFrameField, SerializerDateFrameField
+from pretix.base.timeframes import SerializerDateFrameField
-
-
-class FormFieldWrapperField(serializers.Field):
-    def __init__(self, *args, **kwargs):
-        self.form_field = kwargs.pop('form_field')
-        super().__init__(*args, **kwargs)
-
-    def to_representation(self, value):
-        return self.form_field.widget.format_value(value)
-
-    def to_internal_value(self, data):
-        d = self.form_field.widget.value_from_datadict({'name': data}, {}, 'name')
-        d = self.form_field.clean(d)
-        return d
-
-
-simple_mappings = (
-    (forms.DateField, serializers.DateField, ()),
-    (forms.TimeField, serializers.TimeField, ()),
-    (forms.SplitDateTimeField, serializers.DateTimeField, ()),
-    (forms.DateTimeField, serializers.DateTimeField, ()),
-    (forms.DecimalField, serializers.DecimalField, ('max_digits', 'decimal_places', 'min_value', 'max_value')),
-    (forms.FloatField, serializers.FloatField, ()),
-    (forms.IntegerField, serializers.IntegerField, ()),
-    (forms.EmailField, serializers.EmailField, ()),
-    (forms.UUIDField, serializers.UUIDField, ()),
-    (forms.URLField, serializers.URLField, ()),
-    (forms.BooleanField, serializers.BooleanField, ()),
-)
 
 
 class SerializerDescriptionField(serializers.Field):
@@ -81,13 +52,6 @@ class ExporterSerializer(serializers.Serializer):
     input_parameters = SerializerDescriptionField(source='_serializer')
 
 
-class PrimaryKeyRelatedField(serializers.PrimaryKeyRelatedField):
-    def to_representation(self, value):
-        if isinstance(value, int):
-            return value
-        return super().to_representation(value)
-
-
 class JobRunSerializer(serializers.Serializer):
     def __init__(self, *args, **kwargs):
         ex = kwargs.pop('exporter')
@@ -102,59 +66,7 @@ class JobRunSerializer(serializers.Serializer):
                 many=True
             )
         for k, v in ex.export_form_fields.items():
-            for m_from, m_to, m_kwargs in simple_mappings:
+            self.fields[k] = form_field_to_serializer_field(v)
-                if isinstance(v, m_from):
-                    self.fields[k] = m_to(
-                        required=v.required,
-                        allow_null=not v.required,
-                        validators=v.validators,
-                        **{kwarg: getattr(v, kwargs, None) for kwarg in m_kwargs}
-                    )
-                    break
-
-            if isinstance(v, forms.NullBooleanField):
-                self.fields[k] = serializers.BooleanField(
-                    required=v.required,
-                    allow_null=True,
-                    validators=v.validators,
-                )
-            if isinstance(v, forms.ModelMultipleChoiceField):
-                self.fields[k] = PrimaryKeyRelatedField(
-                    queryset=v.queryset,
-                    required=v.required,
-                    allow_empty=not v.required,
-                    validators=v.validators,
-                    many=True
-                )
-            elif isinstance(v, forms.ModelChoiceField):
-                self.fields[k] = PrimaryKeyRelatedField(
-                    queryset=v.queryset,
-                    required=v.required,
-                    allow_null=not v.required,
-                    validators=v.validators,
-                )
-            elif isinstance(v, forms.MultipleChoiceField):
-                self.fields[k] = serializers.MultipleChoiceField(
-                    choices=v.choices,
-                    required=v.required,
-                    allow_empty=not v.required,
-                    validators=v.validators,
-                )
-            elif isinstance(v, forms.ChoiceField):
-                self.fields[k] = serializers.ChoiceField(
-                    choices=v.choices,
-                    required=v.required,
-                    allow_null=not v.required,
-                    validators=v.validators,
-                )
-            elif isinstance(v, DateFrameField):
-                self.fields[k] = SerializerDateFrameField(
-                    required=v.required,
-                    allow_null=not v.required,
-                    validators=v.validators,
-                )
-            else:
-                self.fields[k] = FormFieldWrapperField(form_field=v, required=v.required, allow_null=not v.required)
 
     def to_internal_value(self, data):
         if isinstance(data, QueryDict):

src/pretix/api/serializers/fields.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.
@@ -109,3 +109,19 @@ class UploadedFileField(serializers.Field):
             return None
         request = self.context['request']
         return request.build_absolute_uri(url)
+
+
+class PluginsField(serializers.Field):
+
+    def to_representation(self, obj):
+        from pretix.base.plugins import get_all_plugins
+
+        return sorted([
+            p.module for p in get_all_plugins()
+            if not p.name.startswith('.') and getattr(p, 'visible', True) and p.module in obj.get_plugins()
+        ])
+
+    def to_internal_value(self, data):
+        return {
+            'plugins': data
+        }

src/pretix/api/serializers/forms.py

@@ -0,0 +1,115 @@
+#
+# This file is part of pretix (Community Edition).
+#
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix 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 django import forms
+from rest_framework import serializers
+
+from pretix.base.timeframes import DateFrameField, SerializerDateFrameField
+
+simple_mappings = (
+    (forms.DateField, serializers.DateField, ()),
+    (forms.TimeField, serializers.TimeField, ()),
+    (forms.SplitDateTimeField, serializers.DateTimeField, ()),
+    (forms.DateTimeField, serializers.DateTimeField, ()),
+    (forms.DecimalField, serializers.DecimalField, ('max_digits', 'decimal_places', 'min_value', 'max_value')),
+    (forms.FloatField, serializers.FloatField, ()),
+    (forms.IntegerField, serializers.IntegerField, ()),
+    (forms.EmailField, serializers.EmailField, ()),
+    (forms.UUIDField, serializers.UUIDField, ()),
+    (forms.URLField, serializers.URLField, ()),
+    (forms.BooleanField, serializers.BooleanField, ()),
+)
+
+
+class PrimaryKeyRelatedField(serializers.PrimaryKeyRelatedField):
+    def to_representation(self, value):
+        if isinstance(value, int):
+            return value
+        return super().to_representation(value)
+
+
+class FormFieldWrapperField(serializers.Field):
+    def __init__(self, *args, **kwargs):
+        self.form_field = kwargs.pop('form_field')
+        super().__init__(*args, **kwargs)
+
+    def to_representation(self, value):
+        return self.form_field.widget.format_value(value)
+
+    def to_internal_value(self, data):
+        d = self.form_field.widget.value_from_datadict({'name': data}, {}, 'name')
+        d = self.form_field.clean(d)
+        return d
+
+
+def form_field_to_serializer_field(field):
+    for m_from, m_to, m_kwargs in simple_mappings:
+        if isinstance(field, m_from):
+            return m_to(
+                required=field.required,
+                allow_null=not field.required,
+                validators=field.validators,
+                **{kwarg: getattr(field, kwarg, None) for kwarg in m_kwargs}
+            )
+
+    if isinstance(field, forms.NullBooleanField):
+        return serializers.BooleanField(
+            required=field.required,
+            allow_null=True,
+            validators=field.validators,
+        )
+    if isinstance(field, forms.ModelMultipleChoiceField):
+        return PrimaryKeyRelatedField(
+            queryset=field.queryset,
+            required=field.required,
+            allow_empty=not field.required,
+            validators=field.validators,
+            many=True
+        )
+    elif isinstance(field, forms.ModelChoiceField):
+        return PrimaryKeyRelatedField(
+            queryset=field.queryset,
+            required=field.required,
+            allow_null=not field.required,
+            validators=field.validators,
+        )
+    elif isinstance(field, forms.MultipleChoiceField):
+        return serializers.MultipleChoiceField(
+            choices=field.choices,
+            required=field.required,
+            allow_empty=not field.required,
+            validators=field.validators,
+        )
+    elif isinstance(field, forms.ChoiceField):
+        return serializers.ChoiceField(
+            choices=field.choices,
+            required=field.required,
+            allow_null=not field.required,
+            validators=field.validators,
+        )
+    elif isinstance(field, DateFrameField):
+        return SerializerDateFrameField(
+            required=field.required,
+            allow_null=not field.required,
+            validators=field.validators,
+        )
+    else:
+        return FormFieldWrapperField(form_field=field, required=field.required, allow_null=not field.required)

src/pretix/api/serializers/i18n.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/api/serializers/item.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.
@@ -550,7 +550,7 @@ class QuestionSerializer(I18nAwareModelSerializer):
         if full_data.get('show_during_checkin') and full_data.get('type') in Question.SHOW_DURING_CHECKIN_UNSUPPORTED:
             raise ValidationError(_('This type of question cannot be shown during check-in.'))
 
-        Question.clean_items(event, full_data.get('items'))
+        Question.clean_items(event, full_data.get('items') or [])
         return data
 
     def validate_options(self, value):
@@ -566,7 +566,7 @@ class QuestionSerializer(I18nAwareModelSerializer):
     @transaction.atomic
     def create(self, validated_data):
         options_data = validated_data.pop('options') if 'options' in validated_data else []
-        items = validated_data.pop('items')
+        items = validated_data.pop('items', [])
 
         question = Question.objects.create(**validated_data)
         question.items.set(items)
@@ -582,7 +582,7 @@ class QuotaSerializer(I18nAwareModelSerializer):
     class Meta:
         model = Quota
         fields = ('id', 'name', 'size', 'items', 'variations', 'subevent', 'closed', 'close_when_sold_out',
-                  'release_after_exit', 'available', 'available_number')
+                  'release_after_exit', 'available', 'available_number', 'ignore_for_event_availability')
 
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)

src/pretix/api/serializers/media.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/api/serializers/order.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.
@@ -42,6 +42,7 @@ from rest_framework.reverse import reverse
 
 from pretix.api.serializers import CompatibleJSONField
 from pretix.api.serializers.event import SubEventSerializer
+from pretix.api.serializers.forms import form_field_to_serializer_field
 from pretix.api.serializers.i18n import I18nAwareModelSerializer
 from pretix.api.serializers.item import (
     InlineItemVariationSerializer, ItemSerializer, QuestionSerializer,
@@ -49,10 +50,12 @@ from pretix.api.serializers.item import (
 from pretix.api.signals import order_api_details, orderposition_api_details
 from pretix.base.decimal import round_decimal
 from pretix.base.i18n import language
+from pretix.base.invoicing.transmission import get_transmission_types
 from pretix.base.models import (
-    CachedFile, Checkin, Customer, Invoice, InvoiceAddress, InvoiceLine, Item,
+    CachedFile, Checkin, Customer, Device, Invoice, InvoiceAddress,
-    ItemVariation, Order, OrderPosition, Question, QuestionAnswer,
+    InvoiceLine, Item, ItemVariation, Order, OrderPosition, Question,
-    ReusableMedium, SalesChannel, Seat, SubEvent, TaxRule, Voucher,
+    QuestionAnswer, ReusableMedium, SalesChannel, Seat, SubEvent, TaxRule,
+    Voucher,
 )
 from pretix.base.models.orders import (
     BlockedTicketSecret, CartPosition, OrderFee, OrderPayment, OrderRefund,
@@ -62,10 +65,13 @@ from pretix.base.pdf import get_images, get_variables
 from pretix.base.services.cart import error_messages
 from pretix.base.services.locking import LOCK_TRUST_WINDOW, lock_objects
 from pretix.base.services.pricing import (
-    apply_discounts, get_line_price, get_listed_price, is_included_for_free,
+    apply_discounts, apply_rounding, get_line_price, get_listed_price,
+    is_included_for_free,
 )
 from pretix.base.services.quotas import QuotaAvailability
-from pretix.base.settings import COUNTRIES_WITH_STATE_IN_ADDRESS
+from pretix.base.settings import (
+    COUNTRIES_WITH_STATE_IN_ADDRESS, ROUNDING_MODES,
+)
 from pretix.base.signals import register_ticket_outputs
 from pretix.helpers.countries import CachedCountries
 from pretix.multidomain.urlreverse import build_absolute_uri
@@ -102,6 +108,13 @@ class CountryField(serializers.Field):
         return str(src) if src else None
 
 
+class TransmissionInfoSerializer(serializers.Serializer):
+    def __init__(self, *args, transmission_type, **kwargs):
+        super().__init__(*args, **kwargs)
+        for k, v in transmission_type.invoice_address_form_fields.items():
+            self.fields[k] = form_field_to_serializer_field(v)
+
+
 class InvoiceAddressSerializer(I18nAwareModelSerializer):
     country = CompatibleCountryField(source='*')
     name = serializers.CharField(required=False)
@@ -109,7 +122,8 @@ class InvoiceAddressSerializer(I18nAwareModelSerializer):
     class Meta:
         model = InvoiceAddress
         fields = ('last_modified', 'is_business', 'company', 'name', 'name_parts', 'street', 'zipcode', 'city', 'country',
-                  'state', 'vat_id', 'vat_id_validated', 'custom_field', 'internal_reference')
+                  'state', 'vat_id', 'vat_id_validated', 'custom_field', 'internal_reference', 'transmission_type',
+                  'transmission_info')
         read_only_fields = ('last_modified',)
 
     def __init__(self, *args, **kwargs):
@@ -147,6 +161,48 @@ class InvoiceAddressSerializer(I18nAwareModelSerializer):
                     {'state': ['"{}" is not a known subdivision of the country "{}".'.format(data.get('state'), cc)]}
                 )
 
+        if data.get("transmission_type"):
+            for t in get_transmission_types():
+                if data.get("transmission_type") == t.identifier:
+                    if not t.is_available(self.context["request"].event, data.get("country"), data.get("is_business")):
+                        raise ValidationError({
+                            "transmission_type": "The selected transmission type is not available for this country or address type."
+                        })
+
+                    ts = TransmissionInfoSerializer(transmission_type=t, data=data.get("transmission_info", {}))
+                    try:
+                        ts.is_valid(raise_exception=True)
+                    except ValidationError as e:
+                        raise ValidationError(
+                            {"transmission_info": e.detail}
+                        )
+                    data["transmission_info"] = ts.validated_data
+
+                    required_fields = t.invoice_address_form_fields_required(data.get("country"), data.get("is_business"))
+                    for r in required_fields:
+                        if r in self.fields:
+                            if not data.get(r):
+                                raise ValidationError(
+                                    {r: "This field is required for the selected type of invoice transmission."}
+                                )
+                        else:
+                            if not ts.validated_data.get(r):
+                                raise ValidationError(
+                                    {"transmission_info": {r: "This field is required for the selected type of invoice transmission."}}
+                                )
+                    break  # do not call else branch of for loop
+                elif t.exclusive:
+                    if t.is_available(self.context["request"].event, data.get("country"), data.get("is_business")):
+                        raise ValidationError({
+                            "transmission_type": "The transmission type '%s' must be used for this country or address type." % (
+                                t.identifier,
+                            )
+                        })
+            else:
+                raise ValidationError(
+                    {"transmission_type": "Unknown transmission type."}
+                )
+
         return data
 
 
@@ -273,7 +329,7 @@ class AnswerSerializer(I18nAwareModelSerializer):
         return data
 
 
-class CheckinSerializer(I18nAwareModelSerializer):
+class InlineCheckinSerializer(I18nAwareModelSerializer):
     device_id = serializers.SlugRelatedField(
         source='device',
         slug_field='device_id',
@@ -285,6 +341,21 @@ class CheckinSerializer(I18nAwareModelSerializer):
         fields = ('id', 'datetime', 'list', 'auto_checked_in', 'gate', 'device', 'device_id', 'type')
 
 
+class CheckinSerializer(I18nAwareModelSerializer):
+    device_id = serializers.SlugRelatedField(
+        source='device',
+        slug_field='device_id',
+        read_only=True,
+    )
+
+    class Meta:
+        model = Checkin
+        fields = (
+            'id', 'successful', 'error_reason', 'error_explanation', 'position', 'datetime', 'list', 'created',
+            'auto_checked_in', 'gate', 'device', 'device_id', 'type'
+        )
+
+
 class PrintLogSerializer(serializers.ModelSerializer):
     device_id = serializers.SlugRelatedField(
         source='device',
@@ -508,7 +579,7 @@ class OrderPositionPluginDataField(serializers.Field):
 
 
 class OrderPositionSerializer(I18nAwareModelSerializer):
-    checkins = CheckinSerializer(many=True, read_only=True)
+    checkins = InlineCheckinSerializer(many=True, read_only=True)
     print_logs = PrintLogSerializer(many=True, read_only=True)
     answers = AnswerSerializer(many=True)
     downloads = PositionDownloadsField(source='*', read_only=True)
@@ -781,14 +852,15 @@ class OrderSerializer(I18nAwareModelSerializer):
         list_serializer_class = OrderListSerializer
         fields = (
             'code', 'event', 'status', 'testmode', 'secret', 'email', 'phone', 'locale', 'datetime', 'expires', 'payment_date',
-            'payment_provider', 'fees', 'total', 'comment', 'custom_followup_at', 'invoice_address', 'positions', 'downloads',
+            'payment_provider', 'fees', 'total', 'tax_rounding_mode', 'comment', 'custom_followup_at', 'invoice_address',
-            'checkin_attention', 'checkin_text', 'last_modified', 'payments', 'refunds', 'require_approval', 'sales_channel',
+            'positions', 'downloads', 'checkin_attention', 'checkin_text', 'last_modified', 'payments', 'refunds',
-            'url', 'customer', 'valid_if_pending', 'api_meta', 'cancellation_date', 'plugin_data',
+            'require_approval', 'sales_channel', 'url', 'customer', 'valid_if_pending', 'api_meta', 'cancellation_date',
+            'plugin_data',
         )
         read_only_fields = (
             'code', 'status', 'testmode', 'secret', 'datetime', 'expires', 'payment_date',
-            'payment_provider', 'fees', 'total', 'positions', 'downloads', 'customer',
+            'payment_provider', 'fees', 'total', 'tax_rounding_mode', 'positions', 'downloads', 'customer',
-            'last_modified', 'payments', 'refunds', 'require_approval', 'sales_channel', 'cancellation_date'
+            'last_modified', 'payments', 'refunds', 'require_approval', 'sales_channel', 'cancellation_date',
         )
 
     def __init__(self, *args, **kwargs):
@@ -953,7 +1025,7 @@ class OrderPositionCreateSerializer(I18nAwareModelSerializer):
         fields = ('positionid', 'item', 'variation', 'price', 'attendee_name', 'attendee_name_parts', 'attendee_email',
                   'company', 'street', 'zipcode', 'city', 'country', 'state', 'is_bundled',
                   'secret', 'addon_to', 'subevent', 'answers', 'seat', 'voucher', 'valid_from', 'valid_until',
-                  'requested_valid_from', 'use_reusable_medium')
+                  'requested_valid_from', 'use_reusable_medium', 'discount')
 
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
@@ -1049,6 +1121,10 @@ class OrderPositionCreateSerializer(I18nAwareModelSerializer):
                     {'state': ['"{}" is not a known subdivision of the country "{}".'.format(data.get('state'), cc)]}
                 )
 
+        if data.get('price') is None and data.get('discount'):
+            raise ValidationError(
+                {'discount': ['You can only specify a discount if you do the price computation, but price is not set.']}
+            )
         return data
 
 
@@ -1103,11 +1179,13 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
         queryset=SalesChannel.objects.none(),
         required=False,
     )
+    tax_rounding_mode = serializers.ChoiceField(choices=ROUNDING_MODES, allow_null=True, required=False,)
     locale = serializers.ChoiceField(choices=[], required=False, allow_null=True)
 
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
         self.fields['positions'].child.fields['voucher'].queryset = self.context['event'].vouchers.all()
+        self.fields['positions'].child.fields['discount'].queryset = self.context['event'].discounts.all()
         self.fields['customer'].queryset = self.context['event'].organizer.customers.all()
         self.fields['expires'].required = False
         self.fields["sales_channel"].queryset = self.context["event"].organizer.sales_channels.all()
@@ -1118,7 +1196,7 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
         fields = ('code', 'status', 'testmode', 'email', 'phone', 'locale', 'payment_provider', 'fees', 'comment', 'sales_channel',
                   'invoice_address', 'positions', 'checkin_attention', 'checkin_text', 'payment_info', 'payment_date',
                   'consume_carts', 'force', 'send_email', 'simulate', 'customer', 'custom_followup_at',
-                  'require_approval', 'valid_if_pending', 'expires', 'api_meta')
+                  'require_approval', 'valid_if_pending', 'expires', 'api_meta', 'tax_rounding_mode')
 
     def validate_payment_provider(self, pp):
         if pp is None:
@@ -1515,19 +1593,22 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
                 pos.voucher_budget_use = max(listed_price - price_after_voucher, Decimal('0.00'))
 
         order_positions = [pos_data['__instance'] for pos_data in positions_data]
-        discount_results = apply_discounts(
+        if not any([p.get("discount") for p in positions_data]):
-            self.context['event'],
+            # If any discount is set by the client (i.e. pretixPOS), we do not recalculate but believe the client
-            order.sales_channel,
+            # to avoid differences in end results.
-            [
+            discount_results = apply_discounts(
-                (cp.item_id, cp.subevent_id, cp.subevent.date_from if cp.subevent_id else None, cp.price,
+                self.context['event'],
-                 bool(cp.addon_to), cp.is_bundled, pos._voucher_discount)
+                order.sales_channel,
-                for cp in order_positions
+                [
-            ]
+                    (cp.item_id, cp.subevent_id, cp.subevent.date_from if cp.subevent_id else None, cp.price,
-        )
+                     bool(cp.addon_to), cp.is_bundled, pos._voucher_discount)
-        for cp, (new_price, discount) in zip(order_positions, discount_results):
+                    for cp in order_positions
-            if new_price != pos.price and pos._auto_generated_price:
+                ]
-                pos.price = new_price
+            )
-            pos.discount = discount
+            for cp, (new_price, discount) in zip(order_positions, discount_results):
+                if new_price != pos.price and pos._auto_generated_price:
+                    pos.price = new_price
+                pos.discount = discount
 
         # Save instances
         for pos_data in positions_data:
@@ -1641,7 +1722,31 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
                 else:
                     f.save()
 
-        order.total += sum([f.value for f in fees])
+        rounding_mode = validated_data.get("tax_rounding_mode")
+        if not rounding_mode:
+            if isinstance(self.context.get("auth"), Device):
+                # Safety fallback to avoid differences in tax reporting
+                brand = self.context.get("auth").software_brand or ""
+                if "pretixPOS" in brand or "pretixKIOSK" in brand:
+                    rounding_mode = "line"
+        if not rounding_mode:
+            rounding_mode = self.context["event"].settings.tax_rounding
+        changed = apply_rounding(
+            rounding_mode,
+            self.context["event"].currency,
+            [*pos_map.values(), *fees]
+        )
+        for line in changed:
+            if isinstance(line, OrderPosition):
+                line.save(update_fields=[
+                    "price", "price_includes_rounding_correction", "tax_value", "tax_value_includes_rounding_correction"
+                ])
+            elif isinstance(line, OrderFee):
+                line.save(update_fields=[
+                    "value", "value_includes_rounding_correction", "tax_value", "tax_value_includes_rounding_correction"
+                ])
+
+        order.total = sum([c.price for c in pos_map.values()]) + sum([f.value for f in fees])
         if simulate:
             order.fees = fees
             order.positions = pos_map.values()
@@ -1705,12 +1810,14 @@ class LinePositionField(serializers.IntegerField):
 
 class InlineInvoiceLineSerializer(I18nAwareModelSerializer):
     position = LinePositionField(read_only=True)
+    event_date_from = serializers.DateTimeField(read_only=True, source="period_start")
+    event_date_to = serializers.DateTimeField(read_only=True, source="period_end")
 
     class Meta:
         model = InvoiceLine
         fields = ('position', 'description', 'item', 'variation', 'subevent', 'attendee_name', 'event_date_from',
-                  'event_date_to', 'gross_value', 'tax_value', 'tax_rate', 'tax_code', 'tax_name', 'fee_type',
+                  'event_date_to', 'period_start', 'period_end', 'gross_value', 'tax_value', 'tax_rate', 'tax_code',
-                  'fee_internal_type', 'event_location')
+                  'tax_name', 'fee_type', 'fee_internal_type', 'event_location')
 
 
 class InvoiceSerializer(I18nAwareModelSerializer):
@@ -1725,12 +1832,13 @@ class InvoiceSerializer(I18nAwareModelSerializer):
         model = Invoice
         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', 'invoice_to_is_business', 'invoice_to_company', 'invoice_to_name', 'invoice_to_street',
-                  'invoice_to_city', 'invoice_to_state', 'invoice_to_country', 'invoice_to_vat_id', 'invoice_to_beneficiary',
+                  'invoice_to_zipcode', 'invoice_to_city', 'invoice_to_state', 'invoice_to_country', 'invoice_to_vat_id',
-                  'custom_field', 'date', 'refers', 'locale',
+                  'invoice_to_beneficiary', 'invoice_to_transmission_info', 'custom_field', 'date', 'refers', 'locale',
                   'introductory_text', 'additional_text', 'payment_provider_text', 'payment_provider_stamp',
                   'footer_text', 'lines', 'foreign_currency_display', 'foreign_currency_rate',
-                  'foreign_currency_rate_date', 'internal_reference')
+                  'foreign_currency_rate_date', 'internal_reference', 'transmission_type', 'transmission_provider',
+                  'transmission_status', 'transmission_date')
 
 
 class OrderPaymentCreateSerializer(I18nAwareModelSerializer):

src/pretix/api/serializers/orderchange.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.
@@ -83,6 +83,7 @@ class OrderPositionCreateForExistingOrderSerializer(OrderPositionCreateSerialize
 
     def create(self, validated_data):
         ocm = self.context['ocm']
+        check_quotas = self.context.get('check_quotas', True)
 
         try:
             ocm.add_position(
@@ -96,7 +97,7 @@ class OrderPositionCreateForExistingOrderSerializer(OrderPositionCreateSerialize
                 valid_until=validated_data.get('valid_until'),
             )
             if self.context.get('commit', True):
-                ocm.commit()
+                ocm.commit(check_quotas=check_quotas)
                 return validated_data['order'].positions.order_by('-positionid').first()
             else:
                 return OrderPosition()  # fake to appease DRF
@@ -310,6 +311,7 @@ class OrderPositionChangeSerializer(serializers.ModelSerializer):
 
     def update(self, instance, validated_data):
         ocm = self.context['ocm']
+        check_quotas = self.context.get('check_quotas', True)
         current_seat = {'seat_guid': instance.seat.seat_guid} if instance.seat else None
         item = validated_data.get('item', instance.item)
         variation = validated_data.get('variation', instance.variation)
@@ -356,7 +358,7 @@ class OrderPositionChangeSerializer(serializers.ModelSerializer):
                 ocm.change_ticket_secret(instance, secret)
 
             if self.context.get('commit', True):
-                ocm.commit()
+                ocm.commit(check_quotas=check_quotas)
                 instance.refresh_from_db()
         except OrderError as e:
             raise ValidationError(str(e))

src/pretix/api/serializers/organizer.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.
@@ -24,6 +24,7 @@ from decimal import Decimal
 
 from django.conf import settings
 from django.core.exceptions import ObjectDoesNotExist
+from django.db import transaction
 from django.db.models import Q
 from django.utils.crypto import get_random_string
 from django.utils.translation import gettext_lazy as _
@@ -32,6 +33,7 @@ from rest_framework.exceptions import ValidationError
 
 from pretix.api.auth.devicesecurity import get_all_security_profiles
 from pretix.api.serializers import AsymmetricField
+from pretix.api.serializers.fields import PluginsField
 from pretix.api.serializers.i18n import I18nAwareModelSerializer
 from pretix.api.serializers.order import CompatibleJSONField
 from pretix.api.serializers.settings import SettingsSerializer
@@ -43,6 +45,10 @@ from pretix.base.models import (
     SalesChannel, SeatingPlan, Team, TeamAPIToken, TeamInvite, User,
 )
 from pretix.base.models.seating import SeatingPlanLayoutValidator
+from pretix.base.plugins import (
+    PLUGIN_LEVEL_EVENT, PLUGIN_LEVEL_EVENT_ORGANIZER_HYBRID,
+    PLUGIN_LEVEL_ORGANIZER,
+)
 from pretix.base.services.mail import SendMailException, mail
 from pretix.base.settings import validate_organizer_settings
 from pretix.helpers.urls import build_absolute_uri as build_global_uri
@@ -53,13 +59,47 @@ logger = logging.getLogger(__name__)
 
 class OrganizerSerializer(I18nAwareModelSerializer):
     public_url = serializers.SerializerMethodField('get_organizer_url', read_only=True)
+    plugins = PluginsField(required=False, source='*')
+    name = serializers.CharField(read_only=True)
+    slug = serializers.CharField(read_only=True)
 
     def get_organizer_url(self, organizer):
         return build_absolute_uri(organizer, 'presale:organizer.index')
 
     class Meta:
         model = Organizer
-        fields = ('name', 'slug', 'public_url')
+        fields = ('name', 'slug', 'public_url', 'plugins')
+
+    def validate_plugins(self, value):
+        from pretix.base.plugins import get_all_plugins
+
+        plugins_available = {
+            p.module: p for p in get_all_plugins(organizer=self.instance)
+            if not p.name.startswith('.') and getattr(p, 'visible', True)
+        }
+        settings_holder = self.instance
+
+        allowed_levels = (PLUGIN_LEVEL_ORGANIZER, PLUGIN_LEVEL_EVENT_ORGANIZER_HYBRID)
+        for plugin in value.get('plugins'):
+            if plugin not in plugins_available:
+                raise ValidationError(_('Unknown plugin: \'{name}\'.').format(name=plugin))
+            if getattr(plugins_available[plugin], 'restricted', False):
+                if plugin not in settings_holder.settings.allowed_restricted_plugins:
+                    raise ValidationError(_('Restricted plugin: \'{name}\'.').format(name=plugin))
+            if getattr(plugins_available[plugin], 'level', PLUGIN_LEVEL_EVENT) not in allowed_levels:
+                raise ValidationError('Plugin cannot be enabled on this level: \'{name}\'.'.format(name=plugin))
+
+        return value
+
+    @transaction.atomic
+    def update(self, instance, validated_data):
+        plugins = validated_data.pop('plugins', None)
+        organizer = super().update(instance, validated_data)
+        # Plugins
+        if plugins is not None:
+            organizer.set_active_plugins(plugins)
+            organizer.save()
+        return organizer
 
 
 class SeatingPlanSerializer(I18nAwareModelSerializer):
@@ -444,6 +484,7 @@ class OrganizerSettingsSerializer(SettingsSerializer):
         '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):

src/pretix/api/serializers/settings.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/api/serializers/shredders.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/api/serializers/voucher.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.
@@ -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/>.
 #
+from decimal import Decimal
+
 from rest_framework import serializers
 from rest_framework.exceptions import ValidationError
 
@@ -64,14 +66,15 @@ class SeatGuidField(serializers.CharField):
 
 class VoucherSerializer(I18nAwareModelSerializer):
     seat = SeatGuidField(allow_null=True, required=False)
+    budget_used = serializers.DecimalField(read_only=True, max_digits=13, decimal_places=2, min_value=Decimal('0.00'))
 
     class Meta:
         model = Voucher
-        fields = ('id', 'code', 'max_usages', 'redeemed', 'min_usages', 'valid_until', 'block_quota',
+        fields = ('id', 'created', 'code', 'max_usages', 'redeemed', 'min_usages', 'valid_until', 'block_quota',
                   'allow_ignore_quota', 'price_mode', 'value', 'item', 'variation', 'quota',
                   'tag', 'comment', 'subevent', 'show_hidden_items', 'seat', 'all_addons_included',
-                  'all_bundles_included')
+                  'all_bundles_included', 'budget', 'budget_used')
-        read_only_fields = ('id', 'redeemed')
+        read_only_fields = ('id', 'redeemed', 'budget_used')
         list_serializer_class = VoucherListSerializer
 
     def validate(self, data):

src/pretix/api/serializers/waitinglist.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/api/serializers/webhooks.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/api/signals.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.
@@ -21,22 +21,22 @@
 #
 from datetime import timedelta
 
-from django.dispatch import Signal, receiver
+from django.dispatch import receiver
 from django.utils.timezone import now
 from django_scopes import scopes_disabled
 
 from pretix.api.models import ApiCall, WebHookCall
-from pretix.base.signals import EventPluginSignal, periodic_task
+from pretix.base.signals import EventPluginSignal, GlobalSignal, periodic_task
 from pretix.helpers.periodic import minimum_interval
 
-register_webhook_events = Signal()
+register_webhook_events = GlobalSignal()
 """
 This signal is sent out to get all known webhook events. Receivers should return an
 instance of a subclass of ``pretix.api.webhooks.WebhookEvent`` or a list of such
 instances.
 """
 
-register_device_security_profile = Signal()
+register_device_security_profile = GlobalSignal()
 """
 This signal is sent out to get all known device security_profiles. Receivers should
 return an instance of a subclass of ``pretix.api.auth.devicesecurity.BaseSecurityProfile``

src/pretix/api/urls.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.
@@ -92,6 +92,7 @@ event_router.register(r'taxrules', event.TaxRuleViewSet)
 event_router.register(r'seats', event.SeatViewSet)
 event_router.register(r'waitinglistentries', waitinglist.WaitingListViewSet)
 event_router.register(r'checkinlists', checkin.CheckinListViewSet)
+event_router.register(r'checkins', checkin.CheckinViewSet)
 event_router.register(r'cartpositions', cart.CartPositionViewSet)
 event_router.register(r'scheduled_exports', exporters.ScheduledEventExportViewSet)
 event_router.register(r'exporters', exporters.EventExportersViewSet, basename='exporters')
@@ -132,6 +133,8 @@ urlpatterns = [
             name="checkinrpc.redeem"),
     re_path(r'^organizers/(?P<organizer>[^/]+)/checkinrpc/search/$', checkin.CheckinRPCSearchView.as_view(),
             name="checkinrpc.search"),
+    re_path(r'^organizers/(?P<organizer>[^/]+)/checkinrpc/annul/$', checkin.CheckinRPCAnnulView.as_view(),
+            name="checkinrpc.annul"),
     re_path(r'^organizers/(?P<organizer>[^/]+)/settings/$', organizer.OrganizerSettingsView.as_view(),
             name="organizer.settings"),
     re_path(r'^organizers/(?P<organizer>[^/]+)/giftcards/(?P<giftcard>[^/]+)/', include(giftcard_router.urls)),

src/pretix/api/views/__init__.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/api/views/cart.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/api/views/checkin.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.
@@ -20,12 +20,13 @@
 # <https://www.gnu.org/licenses/>.
 #
 import operator
+from datetime import timedelta
 from functools import reduce
 
 import django_filters
 from django.conf import settings
 from django.core.exceptions import ValidationError as BaseValidationError
-from django.db import transaction
+from django.db import connection, transaction
 from django.db.models import (
     Count, Exists, F, Max, OrderBy, OuterRef, Prefetch, Q, Subquery,
     prefetch_related_objects,
@@ -39,21 +40,24 @@ from django.utils.translation import gettext
 from django_filters.rest_framework import DjangoFilterBackend, FilterSet
 from django_scopes import scopes_disabled
 from packaging.version import parse
-from rest_framework import views, viewsets
+from rest_framework import status, views, viewsets
 from rest_framework.decorators import action
-from rest_framework.exceptions import PermissionDenied, ValidationError
+from rest_framework.exceptions import (
+    NotFound, PermissionDenied, ValidationError,
+)
 from rest_framework.fields import DateTimeField
 from rest_framework.generics import ListAPIView
 from rest_framework.permissions import SAFE_METHODS
 from rest_framework.response import Response
 
 from pretix.api.serializers.checkin import (
-    CheckinListSerializer, CheckinRPCRedeemInputSerializer,
+    CheckinListSerializer, CheckinRPCAnnulInputSerializer,
-    MiniCheckinListSerializer,
+    CheckinRPCRedeemInputSerializer, MiniCheckinListSerializer,
 )
 from pretix.api.serializers.item import QuestionSerializer
 from pretix.api.serializers.order import (
-    CheckinListOrderPositionSerializer, FailedCheckinSerializer,
+    CheckinListOrderPositionSerializer, CheckinSerializer,
+    FailedCheckinSerializer,
 )
 from pretix.api.views import RichOrderingFilter
 from pretix.api.views.order import OrderPositionFilter
@@ -66,6 +70,8 @@ from pretix.base.models.orders import PrintLog
 from pretix.base.services.checkin import (
     CheckInError, RequiredQuestionsError, SQLLogic, perform_checkin,
 )
+from pretix.base.signals import checkin_annulled
+from pretix.helpers import OF_SELF
 
 with scopes_disabled():
     class CheckinListFilter(FilterSet):
@@ -91,6 +97,16 @@ with scopes_disabled():
             )
             return queryset.filter(expr)
 
+    class CheckinFilter(FilterSet):
+        created_since = django_filters.IsoDateTimeFilter(field_name='created', lookup_expr='gte')
+        created_before = django_filters.IsoDateTimeFilter(field_name='created', lookup_expr='lt')
+        datetime_since = django_filters.IsoDateTimeFilter(field_name='datetime', lookup_expr='gte')
+        datetime_before = django_filters.IsoDateTimeFilter(field_name='datetime', lookup_expr='lt')
+
+        class Meta:
+            model = Checkin
+            fields = ['successful', 'error_reason', 'list', 'type', 'gate', 'device', 'auto_checked_in']
+
 
 class CheckinListViewSet(viewsets.ModelViewSet):
     serializer_class = CheckinListSerializer
@@ -813,7 +829,7 @@ class CheckinListPositionViewSet(viewsets.ReadOnlyModelViewSet):
         ctx = super().get_serializer_context()
         ctx['event'] = self.request.event
         ctx['expand'] = self.request.query_params.getlist('expand')
-        ctx['pdf_data'] = self.request.query_params.get('pdf_data', 'false') == 'true'
+        ctx['pdf_data'] = self.request.query_params.get('pdf_data', 'false').lower() == 'true'
         return ctx
 
     def get_filterset_kwargs(self):
@@ -832,9 +848,9 @@ class CheckinListPositionViewSet(viewsets.ReadOnlyModelViewSet):
     def get_queryset(self, ignore_status=False, ignore_products=False):
         qs = _checkin_list_position_queryset(
             [self.checkinlist],
-            ignore_status=self.request.query_params.get('ignore_status', 'false') == 'true' or ignore_status,
+            ignore_status=self.request.query_params.get('ignore_status', 'false').lower() == 'true' or ignore_status,
             ignore_products=ignore_products,
-            pdf_data=self.request.query_params.get('pdf_data', 'false') == 'true',
+            pdf_data=self.request.query_params.get('pdf_data', 'false').lower() == 'true',
             expand=self.request.query_params.getlist('expand'),
         )
 
@@ -876,7 +892,7 @@ class CheckinListPositionViewSet(viewsets.ReadOnlyModelViewSet):
             user=self.request.user,
             auth=self.request.auth,
             expand=self.request.query_params.getlist('expand'),
-            pdf_data=self.request.query_params.get('pdf_data', 'false') == 'true',
+            pdf_data=self.request.query_params.get('pdf_data', 'false').lower() == 'true',
             questions_supported=self.request.data.get('questions_supported', True),
             canceled_supported=self.request.data.get('canceled_supported', False),
             request=self.request,  # this is not clean, but we need it in the serializers for URL generation
@@ -911,7 +927,7 @@ class CheckinRPCRedeemView(views.APIView):
             user=self.request.user,
             auth=self.request.auth,
             expand=self.request.query_params.getlist('expand'),
-            pdf_data=self.request.query_params.get('pdf_data', 'false') == 'true',
+            pdf_data=self.request.query_params.get('pdf_data', 'false').lower() == 'true',
             questions_supported=s.validated_data['questions_supported'],
             use_order_locale=s.validated_data['use_order_locale'],
             canceled_supported=True,
@@ -989,9 +1005,9 @@ class CheckinRPCSearchView(ListAPIView):
     def get_queryset(self, ignore_status=False, ignore_products=False):
         qs = _checkin_list_position_queryset(
             self.lists,
-            ignore_status=self.request.query_params.get('ignore_status', 'false') == 'true' or ignore_status,
+            ignore_status=self.request.query_params.get('ignore_status', 'false').lower() == 'true' or ignore_status,
             ignore_products=ignore_products,
-            pdf_data=self.request.query_params.get('pdf_data', 'false') == 'true',
+            pdf_data=self.request.query_params.get('pdf_data', 'false').lower() == 'true',
             expand=self.request.query_params.getlist('expand'),
         )
 
@@ -999,3 +1015,101 @@ class CheckinRPCSearchView(ListAPIView):
             qs = qs.none()
 
         return qs
+
+
+class CheckinRPCAnnulView(views.APIView):
+    def post(self, request, *args, **kwargs):
+        if isinstance(self.request.auth, (TeamAPIToken, Device)):
+            events = self.request.auth.get_events_with_permission(('can_change_orders', 'can_checkin_orders'))
+        elif self.request.user.is_authenticated:
+            events = self.request.user.get_events_with_permission(('can_change_orders', 'can_checkin_orders'), self.request).filter(
+                organizer=self.request.organizer
+            )
+        else:
+            raise ValueError("unknown authentication method")
+
+        s = CheckinRPCAnnulInputSerializer(data=request.data, context={'events': events})
+        s.is_valid(raise_exception=True)
+
+        with transaction.atomic():
+            try:
+                qs = Checkin.all.all()
+                if isinstance(request.auth, Device):
+                    qs = qs.filter(device=request.auth)
+                ci = qs.select_for_update(
+                    of=OF_SELF,
+                ).select_related("position", "position__order", "position__order__event").get(
+                    list__in=s.validated_data['lists'],
+                    nonce=s.validated_data['nonce'],
+                )
+                if connection.features.has_select_for_update_of and ci.position_id:
+                    # Lock position as well, can't do it with of= above because relation is nullable
+                    OrderPosition.objects.select_for_update(of=OF_SELF).get(pk=ci.position_id)
+
+                if not ci.successful or not ci.position:
+                    raise ValidationError("Cannot annul an unsuccessful checkin")
+            except Checkin.DoesNotExist:
+                raise NotFound("No check-in found based on nonce")
+            except Checkin.MultipleObjectsReturned:
+                raise ValidationError("Multiple check-ins found based on nonce")
+
+            annulment_time = s.validated_data.get("datetime") or now()
+
+            if annulment_time - ci.datetime > timedelta(minutes=15):
+                # Compare to sent datetime, which makes this cheatable, but allows offline annulment of checkins
+                ci.position.order.log_action('pretix.event.checkin.annulment.ignored', data={
+                    'checkin': ci.pk,
+                    'position': ci.position.id,
+                    'positionid': ci.position.positionid,
+                    'datetime': annulment_time,
+                    'error_explanation': s.validated_data.get("error_explanation"),
+                    'type': ci.type,
+                    'list': ci.list_id,
+                }, user=request.user, auth=request.auth)
+                return Response({
+                    "non_field_errors": ["Annulment is not allowed more than 15 minutes after check-in"]
+                }, status=status.HTTP_400_BAD_REQUEST)
+
+            if ci.device and ci.device != request.auth:
+                return Response({
+                    "non_field_errors": ["Annulment is only allowed from the same device"]
+                }, status=status.HTTP_400_BAD_REQUEST)
+
+            ci.successful = False
+            ci.error_reason = Checkin.REASON_ANNULLED
+            ci.error_explanation = s.validated_data.get("error_explanation")
+            ci.save(update_fields=["successful", "error_reason", "error_explanation"])
+            ci.position.order.log_action('pretix.event.checkin.annulled', data={
+                'checkin': ci.pk,
+                'position': ci.position.id,
+                'positionid': ci.position.positionid,
+                'datetime': annulment_time,
+                'error_explanation': s.validated_data.get("error_explanation"),
+                'type': ci.type,
+                'list': ci.list_id,
+            }, user=request.user, auth=request.auth)
+            checkin_annulled.send(ci.position.order.event, checkin=ci)
+
+        return Response({"status": "ok"}, status=status.HTTP_200_OK)
+
+
+class CheckinViewSet(viewsets.ReadOnlyModelViewSet):
+    serializer_class = CheckinSerializer
+    queryset = Checkin.all.none()
+    filter_backends = (DjangoFilterBackend, RichOrderingFilter)
+    filterset_class = CheckinFilter
+    ordering = ('created', 'id')
+    ordering_fields = ('created', 'datetime', 'id',)
+    permission = 'can_view_orders'
+
+    def get_queryset(self):
+        qs = Checkin.all.filter().select_related(
+            "position",
+            "device",
+        )
+        return qs
+
+    def get_serializer_context(self):
+        ctx = super().get_serializer_context()
+        ctx['event'] = self.request.event
+        return ctx

src/pretix/api/views/device.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/api/views/discount.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/api/views/event.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/api/views/exporters.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/api/views/idempotency.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/api/views/item.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/api/views/media.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/api/views/oauth.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/api/views/order.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.
@@ -88,7 +88,7 @@ from pretix.base.secrets import assign_ticket_secret
 from pretix.base.services import tickets
 from pretix.base.services.invoices import (
     generate_cancellation, generate_invoice, invoice_pdf, invoice_qualified,
-    regenerate_invoice,
+    regenerate_invoice, transmit_invoice,
 )
 from pretix.base.services.mail import SendMailException
 from pretix.base.services.orders import (
@@ -228,7 +228,7 @@ class OrderViewSetMixin:
     def get_queryset(self):
         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':
+            if self.request.query_params.get('include_canceled_fees', 'false').lower() == 'true':
                 fqs = OrderFee.all
             else:
                 fqs = OrderFee.objects
@@ -246,11 +246,11 @@ class OrderViewSetMixin:
         return qs
 
     def _positions_prefetch(self, request):
-        if request.query_params.get('include_canceled_positions', 'false') == 'true':
+        if request.query_params.get('include_canceled_positions', 'false').lower() == 'true':
             opq = OrderPosition.all
         else:
             opq = OrderPosition.objects
-        if request.query_params.get('pdf_data', 'false') == 'true' and getattr(request, 'event', None):
+        if request.query_params.get('pdf_data', 'false').lower() == 'true' and getattr(request, 'event', None):
             prefetch_related_objects([request.organizer], 'meta_properties')
             prefetch_related_objects(
                 [request.event],
@@ -344,7 +344,8 @@ class EventOrderViewSet(OrderViewSetMixin, viewsets.ModelViewSet):
     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'
+        ctx['auth'] = self.request.auth
+        ctx['pdf_data'] = self.request.query_params.get('pdf_data', 'false').lower() == 'true'
         return ctx
 
     def get_base_queryset(self):
@@ -743,7 +744,7 @@ class EventOrderViewSet(OrderViewSetMixin, viewsets.ModelViewSet):
                     user=request.user if request.user.is_authenticated else None,
                     auth=request.auth,
                 )
-            order_placed.send(self.request.event, order=order)
+            order_placed.send(self.request.event, order=order, bulk=False)
             if order.status == Order.STATUS_PAID:
                 order_paid.send(self.request.event, order=order)
                 order.log_action(
@@ -764,7 +765,13 @@ class EventOrderViewSet(OrderViewSetMixin, viewsets.ModelViewSet):
             ) and not order.invoices.last()
             invoice = None
             if gen_invoice:
-                invoice = generate_invoice(order, trigger_pdf=True)
+                try:
+                    invoice = generate_invoice(order, trigger_pdf=True)
+                except Exception as e:
+                    logger.exception("Could not generate invoice.")
+                    order.log_action("pretix.event.order.invoice.failed", data={
+                        "exception": str(e)
+                    })
 
             # Refresh serializer only after running signals
             prefetch_related_objects([order], self._positions_prefetch(request))
@@ -943,6 +950,7 @@ class EventOrderViewSet(OrderViewSetMixin, viewsets.ModelViewSet):
     @action(detail=True, methods=['POST'])
     def change(self, request, **kwargs):
         order = self.get_object()
+        check_quotas = self.request.query_params.get('check_quotas', 'true').lower() == 'true'
 
         serializer = OrderChangeOperationSerializer(
             context={'order': order, **self.get_serializer_context()},
@@ -1008,7 +1016,7 @@ class EventOrderViewSet(OrderViewSetMixin, viewsets.ModelViewSet):
             elif serializer.validated_data.get('recalculate_taxes') == 'keep_gross':
                 ocm.recalculate_taxes(keep='gross')
 
-            ocm.commit()
+            ocm.commit(check_quotas=check_quotas)
         except OrderError as e:
             raise ValidationError(str(e))
 
@@ -1086,17 +1094,18 @@ class OrderPositionViewSet(viewsets.ModelViewSet):
     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'
+        ctx['pdf_data'] = self.request.query_params.get('pdf_data', 'false').lower() == 'true'
+        ctx['check_quotas'] = self.request.query_params.get('check_quotas', 'true').lower() == 'true'
         return ctx
 
     def get_queryset(self):
-        if self.request.query_params.get('include_canceled_positions', 'false') == 'true':
+        if self.request.query_params.get('include_canceled_positions', 'false').lower() == 'true':
             qs = OrderPosition.all
         else:
             qs = OrderPosition.objects
 
         qs = qs.filter(order__event=self.request.event)
-        if self.request.query_params.get('pdf_data', 'false') == 'true':
+        if self.request.query_params.get('pdf_data', 'false').lower() == 'true':
             prefetch_related_objects([self.request.organizer], 'meta_properties')
             prefetch_related_objects(
                 [self.request.event],
@@ -1661,6 +1670,9 @@ class PaymentViewSet(CreateModelMixin, viewsets.ReadOnlyModelViewSet):
         else:
             mark_refunded = request.data.get('mark_canceled', False)
 
+        if not isinstance(request.data.get("comment", ""), str):
+            return Response({'comment': 'Invalid type.'}, status=status.HTTP_400_BAD_REQUEST)
+
         if payment.state != OrderPayment.PAYMENT_STATE_CONFIRMED:
             return Response({'detail': 'Invalid state of payment.'}, status=status.HTTP_400_BAD_REQUEST)
 
@@ -1687,6 +1699,7 @@ class PaymentViewSet(CreateModelMixin, viewsets.ReadOnlyModelViewSet):
             amount=amount,
             provider=payment.provider,
             info='{}',
+            comment=request.data.get("comment"),
         )
         payment.order.log_action('pretix.event.order.refund.created', {
             'local_id': r.local_id,
@@ -1889,6 +1902,12 @@ class RetryException(APIException):
     default_code = 'retry_later'
 
 
+class CurrentlyInflightException(APIException):
+    status_code = 409
+    default_detail = 'The requested action is already in progress.'
+    default_code = 'currently_inflight'
+
+
 class InvoiceViewSet(viewsets.ReadOnlyModelViewSet):
     serializer_class = InvoiceSerializer
     queryset = Invoice.objects.none()
@@ -1937,13 +1956,52 @@ class InvoiceViewSet(viewsets.ReadOnlyModelViewSet):
         resp['Content-Disposition'] = 'attachment; filename="{}.pdf"'.format(invoice.number)
         return resp
 
+    @action(detail=True, methods=['POST'])
+    def transmit(self, request, **kwargs):
+        invoice = self.get_object()
+        if invoice.shredded:
+            raise PermissionDenied('The invoice file is no longer stored on the server.')
+
+        if invoice.transmission_status != Invoice.TRANSMISSION_STATUS_PENDING:
+            raise PermissionDenied('The invoice is not in pending state.')
+
+        transmit_invoice.apply_async(args=(self.request.event.pk, invoice.pk, False))
+        return Response(status=204)
+
+    @action(detail=True, methods=['POST'])
+    def retransmit(self, request, **kwargs):
+        invoice = self.get_object()
+        if invoice.shredded:
+            raise PermissionDenied('The invoice file is no longer stored on the server.')
+
+        with transaction.atomic(durable=True):
+            invoice = Invoice.objects.select_for_update(of=OF_SELF).get(pk=invoice.pk)
+
+            if invoice.transmission_status == Invoice.TRANSMISSION_STATUS_INFLIGHT:
+                raise CurrentlyInflightException()
+
+            invoice.transmission_status = Invoice.TRANSMISSION_STATUS_PENDING
+            invoice.transmission_date = now()
+            invoice.save(update_fields=["transmission_status", "transmission_date"])
+            invoice.order.log_action(
+                'pretix.event.order.invoice.retransmitted',
+                user=self.request.user,
+                auth=self.request.auth,
+                data={
+                    'invoice': invoice.pk,
+                    'full_invoice_no': invoice.full_invoice_no,
+                }
+            )
+        transmit_invoice.apply_async(args=(self.request.event.pk, invoice.pk, True))
+        return Response(status=204)
+
     @action(detail=True, methods=['POST'])
     def regenerate(self, request, **kwargs):
         inv = self.get_object()
         if inv.canceled:
             raise ValidationError('The invoice has already been canceled.')
-        if not inv.event.settings.invoice_regenerate_allowed:
+        if not inv.regenerate_allowed:
-            raise PermissionDenied('Invoices may not be changed after they are created.')
+            raise PermissionDenied('Invoice may not be regenerated.')
         elif inv.shredded:
             raise PermissionDenied('The invoice file is no longer stored on the server.')
         elif inv.sent_to_organizer:

src/pretix/api/views/organizer.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.
@@ -19,7 +19,9 @@
 # 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 operator
 from decimal import Decimal
+from functools import reduce
 
 import django_filters
 from django.contrib.auth.hashers import make_password
@@ -48,15 +50,18 @@ from pretix.api.serializers.organizer import (
     TeamInviteSerializer, TeamMemberSerializer, TeamSerializer,
 )
 from pretix.base.models import (
-    Customer, Device, GiftCard, GiftCardTransaction, Membership,
+    Customer, Device, Event, GiftCard, GiftCardTransaction, LogEntry,
-    MembershipType, Organizer, SalesChannel, SeatingPlan, Team, TeamAPIToken,
+    Membership, MembershipType, Organizer, SalesChannel, SeatingPlan, Team,
-    TeamInvite, User,
+    TeamAPIToken, TeamInvite, User,
+)
+from pretix.base.plugins import (
+    PLUGIN_LEVEL_EVENT, PLUGIN_LEVEL_EVENT_ORGANIZER_HYBRID,
 )
 from pretix.helpers import OF_SELF
 from pretix.helpers.dicts import merge_dicts
 
 
-class OrganizerViewSet(viewsets.ReadOnlyModelViewSet):
+class OrganizerViewSet(mixins.UpdateModelMixin, viewsets.ReadOnlyModelViewSet):
     serializer_class = OrganizerSerializer
     queryset = Organizer.objects.none()
     lookup_field = 'slug'
@@ -65,6 +70,7 @@ class OrganizerViewSet(viewsets.ReadOnlyModelViewSet):
     filter_backends = (TotalOrderingFilter,)
     ordering = ('slug',)
     ordering_fields = ('name', 'slug')
+    write_permission = "can_change_organizer_settings"
 
     def get_queryset(self):
         if self.request.user.is_authenticated:
@@ -83,6 +89,67 @@ class OrganizerViewSet(viewsets.ReadOnlyModelViewSet):
         else:
             return Organizer.objects.filter(pk=self.request.auth.team.organizer_id)
 
+    @transaction.atomic()
+    def perform_update(self, serializer):
+        from pretix.base.plugins import get_all_plugins
+
+        original_data = self.get_serializer(instance=serializer.instance).data
+
+        current_plugins_value = serializer.instance.get_plugins()
+        updated_plugins_value = serializer.validated_data.get('plugins', None)
+
+        super().perform_update(serializer)
+
+        if serializer.data == original_data:
+            # Performance optimization: If nothing was changed, we do not need to save or log anything.
+            # This costs us a few cycles on save, but avoids thousands of lines in our log.
+            return
+
+        if updated_plugins_value is not None and set(updated_plugins_value) != set(current_plugins_value):
+            enabled = {m: 'enabled' for m in updated_plugins_value if m not in current_plugins_value}
+            disabled = {m: 'disabled' for m in current_plugins_value if m not in updated_plugins_value}
+            changed = merge_dicts(enabled, disabled)
+
+            plugins_available = {
+                p.module: p
+                for p in get_all_plugins(organizer=serializer.instance)
+                if not p.name.startswith('.') and getattr(p, 'visible', True)
+            }
+            qs = []
+            for module in disabled:
+                pluginmeta = plugins_available[module]
+                level = getattr(pluginmeta, 'level', PLUGIN_LEVEL_EVENT)
+                if level == PLUGIN_LEVEL_EVENT_ORGANIZER_HYBRID:
+                    qs.append(Q(plugins__regex='(^|,)' + module + '(,|$)'))
+
+            if qs:
+                events_to_disable = set(self.request.organizer.events.filter(
+                    reduce(operator.or_, qs)
+                ).values_list("pk", flat=True))
+                logentries_to_save = []
+                events_to_save = []
+
+                for e in self.request.organizer.events.filter(pk__in=events_to_disable):
+                    for module in disabled:
+                        if module in e.get_plugins():
+                            logentries_to_save.append(
+                                e.log_action('pretix.event.plugins.disabled', user=self.request.user, auth=self.request.auth,
+                                             data={'plugin': module}, save=False)
+                            )
+                            e.disable_plugin(module)
+                            events_to_save.append(e)
+
+                Event.objects.bulk_update(events_to_save, fields=["plugins"])
+                LogEntry.objects.bulk_create(logentries_to_save)
+
+            for module, operation in changed.items():
+                serializer.instance.log_action(
+                    'pretix.organizer.plugins.' + operation,
+                    user=self.request.user,
+                    auth=self.request.auth,
+                    data={'plugin': module}
+                )
+
 
 class SeatingPlanViewSet(viewsets.ModelViewSet):
     serializer_class = SeatingPlanSerializer
@@ -479,7 +546,8 @@ class DeviceViewSet(mixins.CreateModelMixin,
 
 
 class OrganizerSettingsView(views.APIView):
-    permission = 'can_change_organizer_settings'
+    permission = None
+    write_permission = 'can_change_organizer_settings'
 
     def get(self, request, *args, **kwargs):
         s = OrganizerSettingsSerializer(instance=request.organizer.settings, organizer=request.organizer, context={

src/pretix/api/views/shredders.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/api/views/upload.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/api/views/user.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/api/views/version.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/api/views/voucher.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/api/views/waitinglist.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/api/views/webhooks.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/api/webhooks.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.
@@ -78,6 +78,13 @@ class WebhookEvent:
         """
         raise NotImplementedError()  # NOQA
 
+    @property
+    def help_text(self) -> str:
+        """
+        A human-readable description
+        """
+        return ""
+
 
 def get_all_webhook_events():
     global _ALL_EVENTS
@@ -97,9 +104,10 @@ def get_all_webhook_events():
 
 
 class ParametrizedWebhookEvent(WebhookEvent):
-    def __init__(self, action_type, verbose_name):
+    def __init__(self, action_type, verbose_name, help_text=""):
         self._action_type = action_type
         self._verbose_name = verbose_name
+        self._help_text = help_text
         super().__init__()
 
     @property
@@ -110,6 +118,10 @@ class ParametrizedWebhookEvent(WebhookEvent):
     def verbose_name(self):
         return self._verbose_name
 
+    @property
+    def help_text(self):
+        return self._help_text
+
 
 class ParametrizedOrderWebhookEvent(ParametrizedWebhookEvent):
     def build_payload(self, logentry: LogEntry):
@@ -161,6 +173,19 @@ class ParametrizedEventWebhookEvent(ParametrizedWebhookEvent):
         }
 
 
+class ParametrizedVoucherWebhookEvent(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,
+            'voucher': logentry.object_id,
+            'action': logentry.action_type,
+        }
+
+
 class ParametrizedSubEventWebhookEvent(ParametrizedWebhookEvent):
 
     def build_payload(self, logentry: LogEntry):
@@ -346,8 +371,9 @@ def register_default_webhook_events(sender, **kwargs):
         ),
         ParametrizedItemWebhookEvent(
             'pretix.event.item.*',
-            _('Product changed (including product added or deleted and including changes to nested objects like '
+            _('Product changed'),
-              'variations or bundles)'),
+            _('This includes product added or deleted and changes to nested objects like '
+              'variations or bundles.'),
         ),
         ParametrizedEventWebhookEvent(
             'pretix.event.live.activated',
@@ -381,6 +407,19 @@ def register_default_webhook_events(sender, **kwargs):
             'pretix.event.orders.waitinglist.voucher_assigned',
             _('Waiting list entry received voucher'),
         ),
+        ParametrizedVoucherWebhookEvent(
+            'pretix.voucher.added',
+            _('Voucher added'),
+        ),
+        ParametrizedVoucherWebhookEvent(
+            'pretix.voucher.changed',
+            _('Voucher changed'),
+            _('Only includes explicit changes to the voucher, not e.g. an increase of the number of redemptions.')
+        ),
+        ParametrizedVoucherWebhookEvent(
+            'pretix.voucher.deleted',
+            _('Voucher deleted'),
+        ),
         ParametrizedCustomerWebhookEvent(
             'pretix.customer.created',
             _('Customer account created'),
@@ -400,8 +439,12 @@ def register_default_webhook_events(sender, **kwargs):
 def notify_webhooks(logentry_ids: list):
     if not isinstance(logentry_ids, list):
         logentry_ids = [logentry_ids]
-    qs = LogEntry.all.select_related('event', 'event__organizer', 'organizer').filter(id__in=logentry_ids)
+    qs = LogEntry.all.select_related(
-    _org, _at, webhooks = None, None, None
+        'event', 'event__organizer', 'organizer'
+    ).order_by(
+        'action_type', 'organizer_id', 'event_id',
+    ).filter(id__in=logentry_ids)
+    _org, _at, _ev, webhooks = None, None, None, None
     for logentry in qs:
         if not logentry.organizer:
             break  # We need to know the organizer
@@ -411,7 +454,7 @@ def notify_webhooks(logentry_ids: list):
         if not notification_type:
             break  # Ignore, no webhooks for this event type
 
-        if _org != logentry.organizer or _at != logentry.action_type or webhooks is None:
+        if _org != logentry.organizer or _at != logentry.action_type or _ev != logentry.event_id or webhooks is None:
             _org = logentry.organizer
             _at = logentry.action_type
 

src/pretix/base/__init__.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/base/addressvalidation.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/base/apps.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.
@@ -43,10 +43,10 @@ class PretixBaseConfig(AppConfig):
         from . import exporter  # NOQA
         from . import payment  # NOQA
         from . import exporters  # NOQA
-        from . import invoice  # NOQA
+        from .invoicing import pdf, transmission, email, peppol, national  # NOQA
         from . import notifications  # NOQA
         from . import email  # NOQA
-        from .services import auth, checkin, currencies, export, mail, tickets, cart, modelimport, orders, invoices, cleanup, update_check, quotas, notifications, vouchers  # NOQA
+        from .services import auth, checkin, currencies, datasync, export, mail, tickets, cart, modelimport, orders, invoices, cleanup, update_check, quotas, notifications, vouchers  # NOQA
         from .models import _transactions  # NOQA
         from django.conf import settings
 

src/pretix/base/auth.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/base/banlist.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/base/cache.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/base/channels.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/base/context.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/base/customersso/__init__.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.

src/pretix/base/customersso/oidc.py

@@ -1,8 +1,8 @@
 #
 # This file is part of pretix (Community Edition).
 #
-# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2014-2020  Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
+# Copyright (C) 2020-today pretix 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.
@@ -199,6 +199,7 @@ def oidc_validate_authorization(provider, code, redirect_uri, pkce_code_verifier
         params['client_id'] = provider.configuration['client_id']
         params['client_secret'] = provider.configuration['client_secret']
 
+    resp = None
     try:
         resp = requests.post(
             endpoint,
@@ -214,7 +215,10 @@ def oidc_validate_authorization(provider, code, redirect_uri, pkce_code_verifier
         resp.raise_for_status()
         data = resp.json()
     except RequestException:
-        logger.exception('Could not retrieve authorization token')
+        if resp:
+            logger.exception(f'Could not retrieve authorization token. Response: {resp.text}')
+        else:
+            logger.exception('Could not retrieve authorization token')
         raise ValidationError(
             _('Login was not successful. Error message: "{error}".').format(
                 error='could not reach login provider',
@@ -222,6 +226,7 @@ def oidc_validate_authorization(provider, code, redirect_uri, pkce_code_verifier
         )
 
     if 'access_token' not in data:
+        logger.error(f'Could not find access token. Response: {data}')
         raise ValidationError(
             _('Login was not successful. Error message: "{error}".').format(
                 error='access token missing',
@@ -229,6 +234,7 @@ def oidc_validate_authorization(provider, code, redirect_uri, pkce_code_verifier
         )
 
     endpoint = provider.configuration['provider_config']['userinfo_endpoint']
+    resp = None
     try:
         # https://openid.net/specs/openid-connect-core-1_0.html#UserInfo
         resp = requests.get(
@@ -240,7 +246,10 @@ def oidc_validate_authorization(provider, code, redirect_uri, pkce_code_verifier
         resp.raise_for_status()
         userinfo = resp.json()
     except RequestException:
-        logger.exception('Could not retrieve user info')
+        if resp:
+            logger.exception(f'Could not retrieve user info. Response: {resp.text}')
+        else:
+            logger.exception('Could not retrieve user info')
         raise ValidationError(
             _('Login was not successful. Error message: "{error}".').format(
                 error='could not fetch user info',

src/pretix/base/datasync/__init__.py

@@ -0,0 +1,21 @@
+#
+# This file is part of pretix (Community Edition).
+#
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix 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/>.
+#

src/pretix/base/datasync/datasync.py

@@ -0,0 +1,450 @@
+#
+# This file is part of pretix (Community Edition).
+#
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix 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/>.
+#
+
+import json
+import logging
+from collections import namedtuple
+from datetime import timedelta
+from functools import cached_property
+from typing import List, Optional, Protocol
+
+import sentry_sdk
+from django.db import DatabaseError, transaction
+from django.utils.timezone import now
+from django.utils.translation import gettext_lazy as _
+
+from pretix.base.datasync.sourcefields import (
+    EVENT, EVENT_OR_SUBEVENT, ORDER, ORDER_POSITION, get_data_fields,
+)
+from pretix.base.i18n import language
+from pretix.base.logentrytype_registry import make_link
+from pretix.base.models.datasync import OrderSyncQueue, OrderSyncResult
+from pretix.base.signals import PluginAwareRegistry
+from pretix.helpers import OF_SELF
+
+logger = logging.getLogger(__name__)
+
+
+datasync_providers = PluginAwareRegistry({"identifier": lambda o: o.identifier})
+
+
+class BaseSyncError(Exception):
+    def __init__(self, messages, full_message=None):
+        self.messages = messages
+        self.full_message = full_message
+
+
+class UnrecoverableSyncError(BaseSyncError):
+    """
+    A SyncProvider encountered a permanent problem, where a retry will not be successful.
+    """
+    failure_mode = "permanent"
+
+
+class SyncConfigError(UnrecoverableSyncError):
+    """
+    A SyncProvider is misconfigured in a way where a retry without configuration change will
+    not be successful.
+    """
+    failure_mode = "config"
+
+
+class RecoverableSyncError(BaseSyncError):
+    """
+    A SyncProvider has encountered a temporary problem, and the sync should be retried
+    at a later time.
+    """
+    pass
+
+
+class ObjectMapping(Protocol):
+    id: int
+    pretix_model: str
+    external_object_type: str
+    pretix_id_field: str
+    external_id_field: str
+    property_mappings: str
+
+
+StaticMapping = namedtuple('StaticMapping', ('id', 'pretix_model', 'external_object_type', 'pretix_id_field', 'external_id_field', 'property_mappings'))
+
+
+class OutboundSyncProvider:
+    max_attempts = 5
+
+    def __init__(self, event):
+        self.event = event
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        self.close()
+
+    @classmethod
+    @property
+    def display_name(cls):
+        return str(cls.identifier)
+
+    @classmethod
+    def enqueue_order(cls, order, triggered_by, not_before=None, immediate=False):
+        """
+        Adds an order to the sync queue. May only be called on derived classes which define an ``identifier`` attribute.
+
+        Should be called in the appropriate signal receivers, e.g.::
+
+            @receiver(order_placed, dispatch_uid="mysync_order_placed")
+            def on_order_placed(sender, order, **kwargs):
+                MySyncProvider.enqueue_order(order, "order_placed")
+
+        :param order: the Order that should be synced
+        :param triggered_by: the reason why the order should be synced, e.g. name of the signal
+                             (currently only used internally for logging)
+        :param immediate: whether a new sync task should run immediately for this order, instead
+                          of waiting for the next periodic_task interval
+        :return: Return a tuple (queue_item, created), where created is a boolean
+                 specifying whether a new queue item was created.
+        """
+        if not hasattr(cls, 'identifier'):
+            raise TypeError('Call this method on a derived class that defines an "identifier" attribute.')
+        queue_item, created = OrderSyncQueue.objects.update_or_create(
+            order=order,
+            sync_provider=cls.identifier,
+            in_flight=False,
+            defaults={
+                "event": order.event,
+                "triggered_by": triggered_by,
+                "not_before": not_before or now(),
+                "need_manual_retry": None,
+            },
+        )
+        if immediate:
+            from pretix.base.services.datasync import sync_single
+            sync_single.apply_async(args=(queue_item.pk,))
+        return queue_item, created
+
+    @classmethod
+    def get_external_link_info(cls, event, external_link_href, external_link_display_name):
+        return {
+            "href": external_link_href,
+            "val": external_link_display_name,
+        }
+
+    @classmethod
+    def get_external_link_html(cls, event, external_link_href, external_link_display_name):
+        info = cls.get_external_link_info(event, external_link_href, external_link_display_name)
+        return make_link(info, '{val}')
+
+    def next_retry_date(self, sq):
+        """
+        Optionally override to configure a different retry backoff behavior
+        """
+        return now() + timedelta(hours=1)
+
+    def should_sync_order(self, order):
+        """
+        Optionally override this method to exclude certain orders from sync by returning ``False``
+        """
+        return True
+
+    @property
+    def mappings(self):
+        """
+        Implementations must override this property to provide the data mappings as a list of objects.
+
+        They can return instances of the ``StaticMapping`` `namedtuple` defined above, or create their own
+        class (e.g. a Django model).
+
+        :return: The returned objects must have at least the following properties:
+
+                - `id`: Unique identifier for this mapping. If the mappings are Django models, the database primary key
+                  should be used. This may be referenced in other mappings, to establish relations between objects.
+                - `pretix_model`: Which pretix model to use as data source in this mapping. Possible values are
+                  the keys of ``sourcefields.AVAILABLE_MODELS``
+                - `external_object_type`: Destination object type in the target system. opaque string of maximum 128 characters.
+                - `pretix_id_field`: Which pretix data field should be used to identify the mapped object. Any ``DataFieldInfo.key``
+                  returned by ``sourcefields.get_data_fields()`` for the combination of ``Event`` and ``pretix_model``.
+                - `external_id_field`: Destination identifier field in the target system.
+                - `property_mappings`: Mapping configuration as generated by ``PropertyMappingFormSet.to_property_mappings_list()``.
+        """
+        raise NotImplementedError
+
+    def sync_queued_orders(self, queued_orders):
+        """
+        This method should catch all Exceptions and handle them appropriately. It should never throw
+        an Exception, as that may block the entire queue.
+        """
+        for queue_item in queued_orders:
+            with transaction.atomic():
+                try:
+                    sq = (
+                        OrderSyncQueue.objects
+                        .select_for_update(of=OF_SELF, nowait=True)
+                        .select_related("order")
+                        .get(pk=queue_item.pk)
+                    )
+                    if sq.in_flight:
+                        continue
+                    sq.in_flight = True
+                    sq.in_flight_since = now()
+                    sq.save()
+                except DatabaseError:
+                    # Either select_for_update failed to lock the row, or we couldn't set in_flight
+                    # as this order is already in flight (UNIQUE violation). In either case, we ignore
+                    # this order for now.
+                    continue
+
+            try:
+                mapped_objects = self.sync_order(sq.order)
+                if not all(all(not res or res.sync_info.get("action", "") == "nothing_to_do" for res in res_list) for res_list in mapped_objects.values()):
+                    sq.order.log_action("pretix.event.order.data_sync.success", {
+                        "provider": self.identifier,
+                        "objects": {
+                            mapping_id: [osr and osr.to_result_dict() for osr in results]
+                            for mapping_id, results in mapped_objects.items()
+                        },
+                    })
+                sq.delete()
+            except UnrecoverableSyncError as e:
+                sq.set_sync_error(e.failure_mode, e.messages, e.full_message)
+            except RecoverableSyncError as e:
+                sq.failed_attempts += 1
+                sq.not_before = self.next_retry_date(sq)
+                # model changes saved by set_sync_error / clear_in_flight calls below
+                if sq.failed_attempts >= self.max_attempts:
+                    logger.exception('Failed to sync order (max attempts exceeded)')
+                    sentry_sdk.capture_exception(e)
+                    sq.set_sync_error("exceeded", e.messages, e.full_message)
+                else:
+                    logger.info(
+                        f"Could not sync order {sq.order.code} to {type(self).__name__} "
+                        f"(transient error, attempt #{sq.failed_attempts}, next {sq.not_before})",
+                        exc_info=True,
+                    )
+                    sq.clear_in_flight()
+            except Exception as e:
+                logger.exception('Failed to sync order (unhandled exception)')
+                sentry_sdk.capture_exception(e)
+                sq.set_sync_error("internal", [], str(e))
+
+    @cached_property
+    def data_fields(self):
+        return {
+            f.key: f
+            for f in get_data_fields(self.event)
+        }
+
+    def get_field_value(self, inputs, mapping_entry):
+        key = mapping_entry["pretix_field"]
+        try:
+            field = self.data_fields[key]
+        except KeyError:
+            with language(self.event.settings.locale):
+                raise SyncConfigError([_(
+                    'Field "{field_name}" does not exist. Please check your {provider_name} settings.'
+                ).format(field_name=key, provider_name=self.display_name)])
+        try:
+            input = inputs[field.required_input]
+        except KeyError:
+            with language(self.event.settings.locale):
+                raise SyncConfigError([_(
+                    'Field "{field_name}" requires {required_input}, but only got {available_inputs}. Please check your {provider_name} settings.'
+                ).format(field_name=key, required_input=field.required_input, available_inputs=", ".join(inputs.keys()), provider_name=self.display_name)])
+        val = field.getter(input)
+        if isinstance(val, list):
+            if field.enum_opts and mapping_entry.get("value_map"):
+                map = json.loads(mapping_entry["value_map"])
+                try:
+                    val = [map[el] for el in val]
+                except KeyError:
+                    with language(self.event.settings.locale):
+                        raise SyncConfigError([_(
+                            'Please update value mapping for field "{field_name}" - option "{val}" not assigned'
+                        ).format(field_name=key, val=val)])
+
+            val = ",".join(val)
+        return val
+
+    def get_properties(self, inputs: dict, property_mappings: List[dict]):
+        return [
+            (m["external_field"], self.get_field_value(inputs, m), m["overwrite"])
+            for m in property_mappings
+        ]
+
+    def sync_object_with_properties(
+            self,
+            external_id_field: str,
+            id_value,
+            properties: list,
+            inputs: dict,
+            mapping: ObjectMapping,
+            mapped_objects: dict,
+            **kwargs,
+    ) -> Optional[dict]:
+        """
+        This method is called for each object that needs to be created/updated in the external system -- which these are is
+        determined by the implementation of the `mapping` property.
+
+        :param external_id_field: Identifier field in the external system as provided in ``mapping.external_identifier``
+        :param id_value: Identifier contents as retrieved from the property specified by ``mapping.pretix_identifier`` of the model
+                         specified by ``mapping.pretix_model``
+        :param properties: All properties defined in ``mapping.property_mappings``, as list of three-tuples
+                           ``(external_field, value, overwrite)``
+        :param inputs: All pretix model instances from which data can be retrieved for this mapping.
+                       Dictionary mapping from sourcefields.ORDER_POSITION, .ORDER, .EVENT, .EVENT_OR_SUBEVENT to the
+                       relevant Django model.
+                       Most providers don't need to use this parameter directly, as `properties` and `id_value`
+                       already contain the values as evaluated from the available inputs.
+        :param mapping: The mapping object as returned by ``self.mappings``
+        :param mapped_objects: Information about objects that were synced in the same sync run, by mapping definitions
+                               *before* the current one in order of ``self.mappings``.
+                               Type is a dictionary ``{mapping.id: [list of OrderSyncResult objects]}``
+                               Useful to create associations between objects in the target system.
+
+        Example code to create return value::
+
+                 return {
+                    # optional:
+                    "action": "nothing_to_do",  # to inform that no action was taken, because the data was already up-to-date.
+                                                # other values for action (e.g. create, update) currently have no special
+                                                # meaning, but are visible for debugging purposes to admins.
+
+                    # optional:
+                    "external_link_href": "https://external-system.example.com/backend/link/to/contact/123/",
+                    "external_link_display_name": "Contact #123 - Jane Doe",
+                    "...optionally further values you need in mapped_objects for association": 123456789,
+                 }
+
+        The return value needs to be a JSON serializable dict, or None.
+
+        Return None only in case you decide this object should not be synced at all in this mapping. Do not return None in
+        case the object is already up-to-date in the target system (return "action": "nothing_to_do" instead).
+
+        This method needs to be idempotent, i.e. calling it multiple times with the same input values should create
+        only a single object in the target system.
+
+        Subsequent calls with the same mapping and id_value should update the existing object, instead of creating a new one.
+        In a SQL database, you might use an `INSERT OR UPDATE` or `UPSERT` statement; many REST APIs provide an equivalent API call.
+        """
+        raise NotImplementedError()
+
+    def sync_object(
+            self,
+            inputs: dict,
+            mapping,
+            mapped_objects: dict,
+    ):
+        logger.debug("Syncing object %r, %r, %r", inputs, mapping, mapped_objects)
+        properties = self.get_properties(inputs, mapping.property_mappings)
+        logger.debug("Properties: %r", properties)
+
+        id_value = self.get_field_value(inputs, {"pretix_field": mapping.pretix_id_field})
+        if not id_value:
+            return None
+
+        info = self.sync_object_with_properties(
+            external_id_field=mapping.external_id_field,
+            id_value=id_value,
+            properties=properties,
+            inputs=inputs,
+            mapping=mapping,
+            mapped_objects=mapped_objects,
+        )
+        if not info:
+            return None
+        external_link_href = info.pop('external_link_href', None)
+        external_link_display_name = info.pop('external_link_display_name', None)
+        obj, created = OrderSyncResult.objects.update_or_create(
+            order=inputs.get(ORDER), order_position=inputs.get(ORDER_POSITION), sync_provider=self.identifier,
+            mapping_id=mapping.id,
+            defaults=dict(
+                external_object_type=mapping.external_object_type,
+                external_id_field=mapping.external_id_field,
+                id_value=id_value,
+                external_link_href=external_link_href,
+                external_link_display_name=external_link_display_name,
+                sync_info=info,
+                transmitted=now(),
+            )
+        )
+        return obj
+
+    def sync_order(self, order):
+        if not self.should_sync_order(order):
+            logger.debug("Skipping order %r", order)
+            return {}
+
+        logger.debug("Syncing order %r", order)
+        positions = list(
+            order.all_positions
+            .prefetch_related("answers", "answers__question")
+            .select_related(
+                "voucher",
+            )
+        )
+        order_inputs = {ORDER: order, EVENT: self.event}
+        mapped_objects = {}
+        for mapping in self.mappings:
+            if mapping.pretix_model == 'Order':
+                mapped_objects[mapping.id] = [
+                    self.sync_object(order_inputs, mapping, mapped_objects)
+                ]
+            elif mapping.pretix_model == 'OrderPosition':
+                mapped_objects[mapping.id] = [
+                    self.sync_object({
+                        **order_inputs, EVENT_OR_SUBEVENT: op.subevent or self.event, ORDER_POSITION: op
+                    }, mapping, mapped_objects)
+                    for op in positions
+                ]
+            else:
+                raise SyncConfigError("Invalid pretix model '{}'".format(mapping.pretix_model))
+        self.finalize_sync_order(order)
+        return mapped_objects
+
+    def filter_mapped_objects(self, mapped_objects, inputs):
+        """
+        For order positions, only
+        """
+        if ORDER_POSITION in inputs:
+            return {
+                mapping_id: [
+                    osr for osr in results
+                    if osr and (osr.order_position_id is None or osr.order_position_id == inputs[ORDER_POSITION].id)
+                ]
+                for mapping_id, results in mapped_objects.items()
+            }
+        else:
+            return mapped_objects
+
+    def finalize_sync_order(self, order):
+        """
+        Called after ``sync_object`` has been called successfully for all objects of a specific order. Can
+        be used for saving bulk information per order.
+        """
+        pass
+
+    def close(self):
+        """
+        Called after all orders of an event have been synced. Can be used for clean-up tasks (e.g. closing
+        a session).
+        """
+        pass