Oracle
smart-contracts · data
A system that supplies on-chain smart contracts with trustworthy off-chain data.
An oracle bridges blockchains with real-world or off-chain information. Because blockchains can’t fetch external data directly, contracts rely on oracles to provide prices, event outcomes, or other verified facts.
Oracle designs vary from centralized feeds to decentralized networks of reporters. Robust systems use aggregation, staking, and cryptographic proofs to reduce manipulation risk.
Related terms
On-Chain
→Recorded or executed directly in transactions governed by a blockchain's base-layer rules.
blockchain · transaction
Off-chain
→Activity that occurs outside the base blockchain, often for speed, privacy, or cost efficiency.
blockchain
Decentralized Exchange
→A decentralized exchange (DEX) lets users trade digital assets from their wallets through smart contracts or peer-to-peer settlement.
trading · exchange · blockchain