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

---
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 sent by another user, is
  defined by `invite`, `kick`, `ban`, and `redact`, respectively.  The levels
  for `kick`, `ban` and `redact` default 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. `invite` defaults to 0 in either case.

  **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: integer
      events:
        additionalProperties:
          type: integer
        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: integer
      invite:
        description: The level required to invite a user. Defaults to 0 if unspecified.
        type: integer
      kick:
        description: The level required to kick a user. Defaults to 50 if unspecified.
        type: integer
      redact:
        description: The level required to redact an event sent by another user. Defaults to 50 if unspecified.
        type: integer
      state_default:
        description: |-
            The default level required to send state events. Can be overridden
            by the `events` key. Defaults to 50 if unspecified.
        type: integer
      users:
        additionalProperties:
          type: integer
        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: integer
      notifications:
        properties:
          room:
            type: integer
            description: The level required to trigger an `@room` notification. Defaults to 50 if unspecified.
        additionalProperties:
          type: integer
        description: |-
            The power level requirements for specific notification types.
            This is a mapping from `key` to power level for that notifications key.
        title: Notifications
        type: object
    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