Blockchain Oracles — How Smart Contracts Use Data From Outside the Blockchain
11-07-2026
Smart contracts are often described as digital agreements that execute automatically when specific conditions are met. This sounds simple, but it creates an important question: how does a smart contract know that something happened outside the blockchain? A blockchain can record transactions, balances, addresses, and contract activity, but it does not naturally know the price of a currency, the result of a match, the weather, delivery status, or information from a company database.