ReceptionStatus.subject_message_id in case of INVALID_DATA

[lfse-slafleur]

It is possible that a message cannot be read due to various reasons. The S2 standard defines that a ReceptionStatus should be send where the status is set to INVALID_DATA: https://github.com/flexiblepower/s2-ws-json/wiki/Common_messages#receptionstatusvalues
In that case, a message_id is impossible to retrieve.

However, in ReceptionStatus the subject_message_id field is required (https://github.com/flexiblepower/s2-ws-json/wiki/Common_messages#receptionstatus). What should we define as the subject_message_id if the message_id is not retrievable and the ReceptionStatus.status is INVALID_DATA?

[lfse-slafleur]

For now we are using '00000000-0000-0000-0000-000000000000' in s2-python