Summary:
From first glance, it would seem that the progress of each channel.hype_train.progress is determined by the contribution; however, there seems to be no way to determine from the single progress event payload to determine by how much it changed. There is a 'total' amount provided by the last_contribution, but this does not determine the progress provided in that event.

Suggestion:
Add a 'progress_added' value in the event object indicating how much this one event "helped".

Related Topics:
-channel.hype_train.begin
-channel.hype_train.progress