Definition ∞ A real-world data oracle is a service that connects blockchain networks with external information sources. Blockchains, by design, cannot access data outside their own network. Oracles provide verified off-chain data, such as price feeds or event outcomes, to smart contracts. This enables smart contracts to react to external conditions, broadening their utility.
Context ∞ Real-world data oracles are a critical component for the functionality of many decentralized applications (dApps) and decentralized finance (DeFi) protocols. News frequently covers the importance of secure and reliable oracles to prevent data manipulation and ensure the integrity of smart contract executions. The development of robust oracle networks is a key area of innovation for expanding blockchain utility beyond purely on-chain operations.