10 Faces of Blockchain Security (Part 1) Smart Contract Code Vulnerabilities When a blockchain security incident hits the news, it gets compressed into a single line: “the code got hacked.” But in reality, blockchain failures span completely different layers — bugs in the code itself, flaws in economic design, limits of the consensus algorithm, and…
Part 4 of “Oracles in Practice” — a hands-on series for smart-contract engineers. Some facts have no market to average and no public feed to read: a model’s risk score, a proof-of-reserves attestation, the output of an off-chain computation. For these you fall back to the oldest trick in distributed systems — make several independent…
Part 3 of “Oracles in Practice” — a hands-on series for smart-contract engineers. With Chainlink the enemy was staleness. With an on-chain TWAP the enemy flips to manipulation — and the whole design is about making a single-block price shove economically pointless. Here’s how a Uniswap V3 TWAP oracle actually works, and the three footguns…
Part 2 of “Oracles in Practice” — a hands-on series for smart-contract engineers. Here’s the Chainlink integration you’ll find in a hundred tutorials: It compiles, it returns a number, and it is dangerous enough to lose a protocol. Let’s build the version you’d actually deploy, one check at a time, and understand why each line…
Part 1 of “Oracles in Practice” — a hands-on series for smart-contract engineers. Every contract in this series was compiled against OpenZeppelin 5.x and exercised on a real EVM. You already know the one-liner: smart contracts can’t call the outside world. This series is about what that actually forces you to do, where the bodies…