The maximum number of bytes of plain-text a given message could decode to.
* The actual size could be different due to padding. The input message buffer
* is destroyed. Returns olm_error() on failure. If the message base64
* couldn't be decoded then olm_session_last_error() will be
* "INVALID_BASE64". If the message is for an unsupported version of the
* protocol then olm_session_last_error() will be "BAD_MESSAGE_VERSION".
* If the message couldn't be decoded then olm_session_last_error() will be
* "BAD_MESSAGE_FORMAT".
The maximum number of bytes of plain-text a given message could decode to. * The actual size could be different due to padding. The input message buffer * is destroyed. Returns olm_error() on failure. If the message base64 * couldn't be decoded then olm_session_last_error() will be * "INVALID_BASE64". If the message is for an unsupported version of the * protocol then olm_session_last_error() will be "BAD_MESSAGE_VERSION". * If the message couldn't be decoded then olm_session_last_error() will be * "BAD_MESSAGE_FORMAT".