Oracles & Off-Chain Data — Lesson overview

Connect on-chain logic to off-chain reality using oracles (price feeds, VRF, custom jobs) without trusting a single signer.

Defend against stale data, sudden spikes, and oracle outages so your contract fails safe instead of draining funds.

Ship pricing/VRF-dependent flows with clear bounds, circuit breakers, and observability.

Context Many DeFi incidents start with oracle misuse. We’ll wire feeds, sanity-check them, and design fallbacks.