In a swarm, if something is wrong, the peer will retry the connection
but for the sender, they have the file so they should be able to see
it and should not see any "Cancelled" error here.
However, in the future, we will need to update the API to provide
status per users and what peers received the file.

Change-Id: Id02ea3f6552557bdc01d3f13504b5b81efb443e9