> For the complete documentation index, see [llms.txt](https://dev.uniultra.xyz/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://dev.uniultra.xyz/docs/core-concepts/mirror-nodes/hedera-etl.md).

# Hedera ETL

Hedera ETL populates BigQuery dataset with transactions and records generated by the Hedera Mainnet (or Testnet, if so configured).

* Extract: Stream of transactions (and records) are ingested from a GCP PubSub topic
* Transform: Filters for important fields, formats data types, etc
* Load: Streaming insert into BigQuery dataset

Check out the readme [here](https://github.com/blockchain-etl/hedera-etl) to see how you can get started.