Witnet
Witnet is a decentralized oracle network that connects smart contracts on blockchains like Ethereum to real-world data and external APIs. It enables blockchain applications to securely access off-chain information such as price feeds, weather data, or IoT sensor readings without relying on centralized intermediaries. The platform uses a distributed network of nodes to retrieve, attest, and deliver data in a trust-minimized manner.
Developers should learn Witnet when building decentralized applications (dApps) that require reliable external data inputs, such as DeFi protocols needing price oracles, insurance smart contracts using weather data, or supply chain systems tracking real-world events. It provides a censorship-resistant and tamper-proof alternative to centralized oracles, reducing single points of failure and enhancing security for blockchain-based systems.