ADVANCED
Understand how blockchains access real-world data — Chainlink's decentralized oracle network, Pyth's high-frequency feeds, UMA's optimistic oracle, and how oracle design determines DeFi's security guarantees.
The oracle problem, why it exists, and how decentralized oracle networks solve it.
How Chainlink's decentralized oracle network aggregates data from dozens of independent node operators.
Pyth's pull model, UMA's optimistic oracle, and specialized oracle networks.
Economic security, circuit breakers, and how oracle failures cascade into DeFi exploits.
How to integrate oracles correctly — interface patterns, staleness checks, and multi-oracle architecture.
Design a production-grade oracle architecture for a multi-collateral lending protocol.
