Un Oracle It's like a messenger that connects the blockchain to the real world. Smart contracts can't look off the chain on their own, so the oracle tells them things like the price of bitcoin, if it rained in a city or who won a game. This way they can make decisions based on current information.

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Un Oracle In blockchain it is a external system that provides real-world data to smart contracts, allowing them to execute automatic actions based on events or conditions that occur outside the network. Since smart contracts are closed by design and have no native access to external data sources, oracles act like communication bridges between the blockchain and the off-chain environment.

An oracle can provide information such as:

• Asset prices (e.g. BTC/USD, ETH/USDT),
• Sports or election results,
• Meteorological data,
• Logistic conditions in the supply chain,
• IoT sensor states,
• Identity signatures or KYC verification.

There are different types of oracles:

• Software oracles: extract data from APIs, web pages or digital sources.
• Hardware Oracles: connect physical devices such as sensors or RFID.
• Entry oracles (inbound): they bring data from outside to the blockchain.
• Outbound oracles: they allow the blockchain to send signals to the real world.
• Decentralized oracles: such as Chainlink, Witnet or Band Protocol, which aggregate data from multiple sources to reduce the risk of manipulation.

Its operation usually involves cryptography, digital signatures, external consensus validation and reputation systems, since oracles can become critical points of vulnerability if they are not well designed (known as the “Oracle problem”).

In DeFi, gaming, security, tokenization and governance environments, oracles are key to creating advanced conditional logic and connect smart contracts with reality in real time.

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