They already did it, take a look at the bottom of the web page, unfortunately the link that they provide isn't written as whitepaper, but it just a litepaper https://afripay.io/litepaper.pdf

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As I see in the roadmap, It seems that until Q1 2021 they have done well (very simple roadmap), but in Q2 it looks like they will do a lot of things, I wonder if they will be able to finish in time.