Chainlink
Decentralized oracle network — bridge between blockchain and real-world data.
Chainlink (LINK) is an infrastructure protocol solving a key blockchain problem: lack of access to real-world data.
How it works:
•Node operators (Chainlink oracles) fetch data from off-chain sources
•Aggregate data from multiple sources for accuracy
•Write them to the blockchain for smart contracts
What is transferred:
•Crypto and stock prices (price feeds)
•Weather forecasts, sports results
•Random numbers (VRF — Verifiable Random Function for NFT/gaming)
•Banking system confirmations (SWIFT integration)
Chainlink is used by: Aave, Synthetix, dYdX, Compound and virtually every major DeFi protocol.
STAKE: LINK staking v0.2 with ~4.5% APY and slashing mechanism for dishonest node operators.