Fetching Off-Chain Data
Implement smart contracts that request and receive data from Chainlink oracles, such as price feeds or external API calls.
Data Beyond the Blockchain
Smart contracts are powerful, but they operate in isolation on the blockchain. They can't directly access information from the 'real world' like current stock prices, weather data, or external API responses.
This limitation is known as the oracle problem. To overcome it, we use oracles.
Chainlink's Data Solution
Chainlink is a decentralized oracle network designed to securely connect smart contracts with off-chain data and services.
- It acts as a bridge between the blockchain and external systems.
- Chainlink nodes collect data from various sources.
- They then deliver this data to smart contracts in a reliable and verifiable way.
All lessons in this course
- The Oracle Problem
- Chainlink Fundamentals
- Fetching Off-Chain Data