I have a custom (journal entry) transaction type. I'm trying to create an approval workflow for this, and setting the "Approval Status" is firing successfully, but doesn't seem to be actually approving/posting the entry and I can't figure out what field to hit to do this. Seems to be the Status field or {transtatus} field that's controlling this, but that doesn't seem accessible via workflow (or at least I can't figure out what that field is actually named in the dropdown). I'm sure I'm missing something obvious. Any advice would be greatly appreciated.

It’s called custom transaction status

Sweet, that does look like what I'm looking for. I'll give it a shot. Thanks!