Questions on recipients search API

[Kenneth Feldt]

Tried posting this on general group with no response - thought I'd try again cross posting to this group:

We are doing some mobile stuff - reconstructing some messaging features and using the search/recipients API. There are some parameters used by the canvas application (when creating messages) that aren't fully explained in the api docs:

- what is the 'synthetic_contexts=true' string doing when fetching recipients. We tried a fetch of recipients that used type=context, bit it returned nothing (even though the user was assigned to both sections and groups). I was able to receive contexts only when adding the 'synthetic_contexts=true' segment to the URL (which I found by sniffing the requests run from the canvas app itself). So what is this string (synthetic_contexts=true) supposed to mean?

- I also noted that the canvas app used the 'permissions[]=send_messages_all' fragment --- where is 'send_messages_all' described as I can't seem to find the API page that describes what the permissions mean - how does it differ from 'permissions[]=send_messages'?

Thanks