I can't say this is exactly what you're after, but this article is really interesting https://calpaterson.com/bank-python.html https://calpaterson.com/bank-pyt

I can't say this is exactly what you're after, but this article is really interesting https://calpaterson.com/bank-python.html https://calpaterson.com/bank-python.html Similar to what the author describes, I wouldn't be surprised if a lot of this information is generally not public.