Query a devnet wallet balance in SOL and lamports, inspect transaction fees. Why Solana uses integer lamports end-to-end, and why you must never cast bigint balances to Number.

Generate a Solana keypair once, persist it to wallet.json, reload on every future run, check devnet balance. PKCS8 export quirks + 64-byte secret key format explained.

Kicking off 100 Days of Solana. Day 1: generate a keypair with @solana/kit, fund it from the devnet faucet, and verify the balance.