# Genesis file

To connect to the mainnet, you will need the corresponding genesis file. Visit the [mainnet repo](https://github.com/realiotech/mainnet) and download the correct genesis file by running the following command.

```bash
# Download the existing genesis file for the testnet
# Replace <chain-id> with the id of the testnet you would like to join
curl https://raw.githubusercontent.com/realiotech/mainnet/master/realionetwork_3301-1/genesis.json > $HOME/.realio-network/config/genesis.json
```

{% hint style="warning" %}
**IMPORTANT**\
Always verify the genesis sha256 checksum before starting your node. You can find the checksum in the repository's README.md file.
{% endhint %}


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.realio.network/mainnet/genesis-file.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.