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A m.key.verification.request was accepted by a different device. The device receiving this error can ignore the verification request.

Internal error.

The message received was invalid.

The key was not verified.

For SAS: The hash commitment did not match.

For SAS: The SAS did not match.

The verification process timed out. Verification processes can define their own timeout parameters.

The device received an unexpected message. Typically raised, when one of the parties is handling the verification out of order.

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.

The device does not know about the given transaction ID.

The user cancelled the verification.

The expected user did not match the user verified.