It seems the API for retrieving data always expects a range of dates, batch ID, or transaction ID (http://www.authorize.net/support/ReportingGuide_SOAP.pdf).
Is there a way to get the date of last ARB payment for a customer, given the customer's ID or email address?
I want to figure out the date of their last payment so we can prorate them when they upgrade their account.
Using webhooks is not an ideal solution.
