Why do DeFi protocols need oracles?

Smart contracts can only access data that exists on their own blockchain. Oracles like Chainlink securely report off-chain prices and events so contracts can react to real-world conditions.

Chainlink (LINK)

The leading decentralized oracle network.

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Category: Oracle · Infrastructure
Launched: 2017
Founders: Sergey Nazarov, Steve Ellis
Consensus: Decentralized oracle network (off-chain)

About Chainlink

Chainlink provides decentralized oracles that bring real-world data — prices, weather, sports scores — onto blockchains. It is used by the majority of DeFi protocols for price feeds.

LINK is the token used to pay node operators for retrieving and reporting data on-chain.

What is LINK used for?

Price oracles for DeFi
Verifiable random functions (VRF)
Cross-chain interoperability (CCIP)

Chainlink FAQ

Why do DeFi protocols need oracles?: Smart contracts can only access data that exists on their own blockchain. Oracles like Chainlink securely report off-chain prices and events so contracts can react to real-world conditions.

Disclaimer: The content on this page is for educational purposes only and does not constitute financial advice. Cryptocurrency markets are volatile. Always do your own research and never invest more than you can afford to lose. See our methodology for details on how we generate analysis.