From Keypairs to Identity: My First 4 Days Learning Solana as a Web2 Dev

When I started the #100DaysOfSolana challenge, I expected to learn tools and APIs. What I didn’t expect was how quickly my understanding of identity would change. In Web2, identity = usernames + passwords stored by companies. On Solana, identity = a cryptographic keypair that you own . This post breaks that down with real code and what I built in my first 4 days. 🧠 Identity = Keypair (The Core Idea) Every Solana identity is: Public Key → your address (shareable) Private Key → your authority (mu