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matrix-spec/event-schemas/schema/m.key.verification.cancel

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---
allOf:
- $ref: core-event-schema/event.yaml
description: |-
Cancels a key verification process/request. Typically sent as a `to-device`_ event.
properties:
content:
properties:
transaction_id:
type: string
description: |-
The opaque identifier for the verification process/request.
reason:
type: string
description: |-
A human readable description of the ``code``. The client should only rely on this
string if it does not understand the ``code``.
code:
type: string
# Note: this is not an enum because we go into detail about the different
# error codes. If we made this an enum, we'd be repeating information.
# Also, we can't put a real bulleted list in here because the HTML2RST parser
# cuts the text at weird points, breaking the list completely.
description: |-
The error code for why the process/request was cancelled by the user. Error
codes should use the Java package naming convention if not in the following
list:
``m.user``: The user cancelled the verification.
``m.timeout``: The verification process timed out. Verification processes
can define their own timeout parameters.
``m.unknown_transaction``: The device does not know about the given transaction
ID.
``m.unknown_method``: The device does not know how to handle the requested
method. This should be sent for ``m.key.verification.start`` messages and
messages defined by individual verification processes.
``m.unexpected_message``: The device received an unexpected message. Typically
raised when one of the parties is handling the verification out of order.
``m.key_mismatch``: The key was not verified.
``m.user_mismatch``: The expected user did not match the user verified.
``m.invalid_message``: The message received was invalid.
``m.accepted``: A ``m.key.verification.request`` was accepted by a different
device. The device receiving this error can ignore the verification request.
Clients should be careful to avoid error loops. For example, if a device sends
an incorrect message and the client returns ``m.invalid_message`` to which it
gets an unexpected response with ``m.unexpected_message``, the client should not
respond again with ``m.unexpected_message`` to avoid the other device potentially
sending another error response.
.. The above blank line is important for RST.
required:
- transaction_id
- code
- reason
type: object
type:
enum:
- m.key.verification.cancel
type: string
type: object