TL;DR if you can’t read the code: the client architecture is heavily reliant on a centralized caching server and often trusts it as is

your relays determine maybe some and reads, and event writes, that is it nostr:note1lmvcjjls0zwh49sexphrzg3rp5l9l5lu9wpfm8f8qd5x07kd7zcs5p4zyx