matrix-spec/event-schemas/schema/m.room.power_levels

---
allOf:
  - $ref: core-event-schema/state_event.yaml
description: |-
  This event specifies the minimum level a user must have in order to perform a
  certain action. It also specifies the levels of each user in the room.

  If a ``user_id`` is in the ``users`` list, then that ``user_id`` has the
  associated power level. Otherwise they have the default level
  ``users_default``. If ``users_default`` is not supplied, it is assumed to be
  0. If the room contains no ``m.room.power_levels`` event, the room's creator has
  a power level of 100, and all other users have a power level of 0.

  The level required to send a certain event is governed by ``events``,
  ``state_default`` and ``events_default``. If an event type is specified in
  ``events``, then the user must have at least the level specified in order to
  send that event. If the event type is not supplied, it defaults to
  ``events_default`` for Message Events and ``state_default`` for State
  Events.

  If there is no ``state_default`` in the ``m.room.power_levels`` event, the
  ``state_default`` is 50. If there is no ``events_default`` in the
  ``m.room.power_levels`` event, the ``events_default`` is 0. If the room
  contains no ``m.room.power_levels`` event, *both* the ``state_default`` and
  ``events_default`` are 0.

  The power level required to invite a user to the room, kick a user from the
  room, ban a user from the room, or redact an event, is defined by ``invite``,
  ``kick``, ``ban``, and ``redact``, respectively. Each of these levels defaults
  to 50 if they are not specified in the ``m.room.power_levels`` event, or if
  the room contains no ``m.room.power_levels`` event.

  .. NOTE::

    As noted above, in the absence of an ``m.room.power_levels`` event, the
    ``state_default`` is 0, and all users are considered to have power level 0.
    That means that **any** member of the room can send an
    ``m.room.power_levels`` event, changing the permissions in the room.

    Server implementations should therefore ensure that each room has an
    ``m.room.power_levels`` event as soon as it is created. See also the
    documentation of the ``/createRoom`` API.

properties:
  content:
    properties:
      ban:
        description: The level required to ban a user. Defaults to 50 if unspecified.
        type: number
      events:
        additionalProperties:
          type: number
        description: The level required to send specific event types. This is a mapping from event type to power level required.
        title: Event power levels
        type: object
      events_default:
        description: |-
            The default level required to send message events. Can be
            overridden by the ``events`` key.  Defaults to 0 if unspecified.
        type: number
      invite:
        description: The level required to invite a user. Defaults to 50 if unspecified.
        type: number
      kick:
        description: The level required to kick a user. Defaults to 50 if unspecified.
        type: number
      redact:
        description: The level required to redact an event. Defaults to 50 if unspecified.
        type: number
      state_default:
        description: |-
            The default level required to send state events. Can be overridden
            by the ``events`` key. Defaults to 50 if unspecified, but 0 if
            there is no ``m.room.power_levels`` event at all.
        type: number
      users:
        additionalProperties:
          type: number
        description: The power levels for specific users. This is a mapping from ``user_id`` to power level for that user.
        title: User power levels
        type: object
      users_default:
        description: |-
            The default power level for every user in the room, unless their
            ``user_id`` is mentioned in the ``users`` key. Defaults to 0 if
            unspecified.
        type: number
    type: object
  state_key:
    description: A zero-length string.
    pattern: '^$'
    type: string
  type:
    enum:
      - m.room.power_levels
    type: string
title: Defines the power levels (privileges) of users in the room.
type: object