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Implements #46
Currently there is no way to retrieve elapsed, remaining or absolute time of a window for TOTP. The
RemainingSeconds()
method returns an integer and is therefore not satisfactory to trigger actions on new time window (such as updating UI).While
Step
is now available, the calculation of required values is non-trivial and requires knowledge of implementation details (such as the used epoch).This PR adds
WindowStart()
method that returns absolute time of the current TOTP window. That way, users can get:DateTime
of when current window started ...WindowStart()
TimeSpan
asWindowStart() - now
TimeSpan
asnow + TimeSpan.FromSeconds(Step) - WindowStart()