Chainlink is the largest provider of decentralized oracles in the crypto industry. The technology is particularly in demand in the field of decentralized finance. Oracles are also used by large companies that are not related to the blockchain. LINK is a native Chainlink token. It is used mainly to pay for the work of node operators, on the basis of which oracles work.

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Chainlink

Here's how #Chainlink delivers data to #Web3: 

Individual nodes fetch off-chain data
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Decentralized oracle networks publish aggregated data on-chain 
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Smart contracts access the data
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Hyper-reliable data underpins Web3

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Here's how #Chainlink delivers data to #Web3:. Individual nodes fetch off-chain data.