# Copyright 2019-2023 The Matrix.org Foundation C.I.C.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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type: object
title: Persistent Data Unit
description: A persistent data unit (event) for room version 11 and beyond.
example:
  $ref: "../examples/pdu_v11.json"
allOf:
  # v11 is the v4 event, but without redacts. Copy the auth_events/prev_events
  # from pdu_v4.yaml and hashes and signatures from pdu_v3.yaml.
  - $ref: "unsigned_pdu_base.yaml"
  - type: object
    properties:
      auth_events:
        type: array
        items:
          type: string
          description: Event ID.
        description: |-
          Event IDs for the authorization events that would
          allow this event to be in the room.

          Must contain less than or equal to 10 events. Note that if the relevant
          auth event selection rules are used, this restriction should never be
          encountered.
        example: ["$URLsafe-base64EncodedHash", "$Another_Event"]
      prev_events:
        type: array
        items:
          type: string
          description: Event ID.
        description: |-
          Event IDs for the most recent events in the room
          that the homeserver was aware of when it made this event.

          Must contain less than or equal to 20 events.
        example: ["$URLsafe-base64EncodedHash", "$Another_Event"]
      hashes:
        $ref: "event_hash.yaml"
      signatures:
        type: object
        description: |-
          Signatures for the PDU, following the algorithm specified in [Signing Events](/server-server-api/#signing-events).
        example: {
          "example.com": {
            "ed25519:key_version:": "86BytesOfSignatureOfTheRedactedEvent"
          }
        }
        additionalProperties:
          type: object
          title: Server Signatures
          additionalProperties:
            type: string
    required:
      - auth_events
      - prev_events
      - hashes
      - signatures