
Denial Of Service Attack An overview of Denial-of-Service (DoS) vulnerabilities in smart contracts, covering three common attack types (unbounded loops, external data manipulation, and failing external calls) with vulnerable code examples and recommended fixes such as the pull-over-push pattern, independent token ID counters, and withdrawal-based refunds.

Solana Security Pitfalls and How to Prevent ThemA practical guide to four common security flaws in Solana programs: missing signer checks, missing ownership checks, division by zero, and integer overflow/underflow. Each is shown with vulnerable Rust code, an exploit scenario, and a simple fix.

The Internet Finally Has a Payment Layer : x402An introduction to x402, Coinbase's open payment protocol that uses the HTTP 402 "Payment Required" status code to let AI agents and applications pay for APIs and online resources instantly with stablecoins, with no accounts, KYC, or API keys needed.