Connect Your Smart Contracts to the Outside World

Chainlink Data Feeds are the quickest way to connect your smart contracts to the real-world data such as asset prices. One use for data feeds is to retrieve the latest pricing data of an asset in a single call and use that data either on-chain in a smart contract or off-chain in another application of your choice.

If you already have a project started and would like to integrate Chainlink, you can add Chainlink to your existing project by using the chainlink NPM package.

See the Data Feeds Contract Addresses page for a list of networks and proxy addresses. You can also use data.chain.link or the Chainlink Market to select nodes for your requests.

Retrieve the Latest Asset Prices

Often, smart contracts need to act in real-time on data such as prices of assets. This is especially true in DeFi.

For example, Synthetix uses Data Feeds to determine prices on their derivatives platform. Lending and borrowing platforms like AAVE use Data Feeds to ensure the total value of the collateral.

Data Feeds aggregate many data sources and publish them on-chain using the Off-chain Reporting Model.