An oracle plays a crucial role by serving as a bridge between blockchain smart contracts and external data sources. These tools are essential because smart contracts, by design, cannot access or interact with data outside of their native blockchain. Oracles provide a solution to this limitation by fetching data from the outside world and feeding it into the blockchain, enabling smart contracts to execute based on real-world information.
Price feeds are a subset of the Oracles, in which price data is posted to the blockchain by an Oracle.
These providers are often significantly more centralized than the blockchains they operate on, selecting one you can trust is critical. Below are some of the most popular.
Learn what an oracle is and how to build one on the Ethereum blockchain.
Guide - July 3, 2023
Running a Chainlink node allows you to provide external data directly to smart contracts. In this guide, we will configure our Chainlink node and become a node operator on the Ethereum mainnet.
Guide - December 11, 2023
Generating randomness on a blockchain can be difficult since smart contracts are deterministic and can be predicted. However, Chainlink solves this problem. This article will teach you about Chainlink VRF and how it works.
Guide - August 18, 2023