How I built a counter program in Anchor and learned to trust my tests

<p>I spent a week building a counter program in Anchor — the Rust framework<br /> for writing Solana programs. By the end I had two instructions, one<br /> authorization

<p>Security bugs on Solana do not always come from obscure runtime behaviour or complicated cryptography.</p> <p>Often, a program trusted the wrong account, accepted the wrong

<p>On Solana, programs are stateless. If your program needs to remember something per user, per game, or per configuration, it needs a deterministic address it can find again