For reporting to the company-wide report system we need to request an issue's remaining estimate at a past date using Jira REST API.
The truth is we seem unable to find an specific request for this. All we get is current remaining estimate, while we need this value at different past dates.
That's correct I'm afraid. The REST API does not have a function for this. In fact, it has no function for "field was X at time Y" (although the issue search is able to do some searches through the history).
But you do get enough from "show me an issue" that would enable you to work it out. There are three parts to an issue to look at:
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