Week 2 of #100DaysOfSolana: on reading public data, comparing accounts to tables, and the moment the "everything is public" thing got real.

Let me tell you about the exact moment week 2 of this challenge stopped feeling theoretical.

I had just written my first getBalance() call. Simple stuff paste an address, get a number back. And then I thought: what if I paste someone else's address?

So I did. I pasted the Token-2022 program address ( TokenzQdBNbLqP5VEhdkAS6EPFLC1PHnBqCXEpPxuEb ) into my script. Same code, different address. And it just... worked. No API key. No authentication. No 403 Forbidden . Full balance, full transaction history, returned immediately.

That's when the "Solana is a public database" framing stopped being a metaphor and started being a fact I could feel.

What I Actually Built This Week

Week 2 was the Reading the Blockchain arc.…