What can you read about the development of fintech?

Question

Programming

Please suggest books/videos/articles etc. on developing financial applications.

Topics of interest:

1. Internal arrangement of payment systems;
   
2. internal structure of banking software;
   
3. Cryptocurrencies, blockchain development.
   

I had to develop accounting systems for cash transactions, I decided to delve into this topic.)

Answer 1

The only thing that is available in the public is the blockchain. You can google any articles, videos, and even books. One resource is not enough. As for the rest - there you need to know 2 topics; safety and guaranteed delivery (moreover, exactly one delivery). More about transactions in distributed systems