Substreams is a powerful indexing technology, which allows you to:

• Extract data from several blockchains (Solana, Ethereum, Polygon, BNB...).
• Apply custom transformations to the data.
• Send the data to a place of your choice (for example, a Postgres database or a file).

You can use Substreams packages to define which specific data you want to extract from the blockchain. For example, consider that you want to retrieve data from the Uniswap v3 smart contract. You can simply use the Uniswap v3 Substreams Package and send that data wherever you want!

Watch the following video and visit the Getting Started to learn more about how Substreams works.

{% embed url="https://www.youtube.com/watch?v=gVqGCqKVM08" %} Get an overview of Substreams {% endembed %}