[Dev Only] Freeswitch ESL and SMS (SIP SIMPLE)

Does anyone have experience with freeswitch esl?

I am hooked into freeswitch esl through node. I do this to greatly extend the functionality of freeswitch.

What I am trying to do is catch the event when freeswitch processes an SMS. I can see it on fs_cli (console) but I am not finding ANY event header for it and trying to avoid writing a js script fs side in mod_sms.

I googled for a bit and found that the event header was 'CUSTOM' (Where sofia events fire) and the subclass was 'sms::receive-message'. But this subclass does not exist.

I even looped through all object properties of the event::custom object. I searched for sms and SMS but turned up nothing.

Does anyone have any experience with this?