> For the complete documentation index, see [llms.txt](https://docs.creditcoin.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.creditcoin.org/creditcoin-usc/usc-operator-guides.md).

# USC Operator Guides

### Attestor Role

Attestors have two main roles:

1. **Following and attesting to source-chain blocks.** Attestors follow new blocks on a source chain and attest to them. This is done eagerly, and enables inexpensive and rapid readability of source-chain data.
2. **Signing writability messages** *(not yet released).* In an upcoming release, Attestors will also sign writability messages. This will enable Universal Smart Contracts to send data to a destination chain, effectively providing full two-way interoperability.

### Relayer Role

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The Relayer role is evolving quickly. To keep up with the latest Relayer news, stay in touch with us through the Creditcoin [blog](https://creditcoin.org/blog), [Discord](https://discord.gg/creditcoin), and [X](https://x.com/creditcoin).
{% endhint %}