Oracle Integration and Data Feeds

Smart contracts are, by their very nature, isolated from the outside world. They can only access data stored on their native blockchain. This limitation, often called the "oracle problem," means a smart contract cannot independently verify real-world events or access external data like stock prices, weather conditions, or sports scores. Oracles are the essential bridge that solves this problem. They are third-party services that securely and reliably feed off-chain data into on-chain smart contracts, enabling them to execute based on real-world conditions.

The Role of Oracles in DApp Functionality
Without an oracle, a decentralized finance (DeFi) lending protocol would be unable to liquidate a borrower's collateral when its value drops below a certain threshold. It has no way of knowing the real-time market price.
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