Notitia
Bridging chains to real-world data.
A blockchain cannot, on its own, know a market price or a sports result. Oracles (like Chainlink) feed such external data to smart contracts in a decentralised, verifiable way.
They are essential to DeFi (asset prices, liquidations) but are a sensitive point: a corrupted feed can be exploited - ‘oracle risk’.
Test your understanding with a quick interactive quiz.