> For the complete documentation index, see [llms.txt](https://docs.blocktorch.xyz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.blocktorch.xyz/concepts/data-sources.md).

# Data Sources

At Blocktorch we believe a hollistic approach to DevOps in web3 is necessary, so instead of pure smart contract observability we are integrating with multiple layers of the architecture of web3

<figure><img src="https://4201788747-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F5vTnL6SrT2qX7rXjH96E%2Fuploads%2FEjhmQojiWpevTLvQXSE2%2FUntitled%20(54).png?alt=media&amp;token=9429ac6d-c0d7-48fe-99ee-b83114147a45" alt=""><figcaption></figcaption></figure>

### Backend Infrastructure aka Nodes

{% content-ref url="/pages/OhqF5pvsFvor3fqpabun" %}
[EVM Chains](/concepts/data-sources/evm-chains.md)
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{% content-ref url="/pages/37eWvCCvknEkIhxP3bpT" %}
[Roll-ups](/concepts/data-sources/roll-ups.md)
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{% content-ref url="/pages/2dZHwzvwPNczH9cV81QO" %}
[Local forks](/concepts/data-sources/local-forks.md)
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{% content-ref url="/pages/fw0AZZu3P3bgZ7ZaiZg8" %}
[Custom Event Data](/concepts/data-sources/custom-event-data.md)
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### Functions & Logic

{% content-ref url="/pages/g0KJGfUIdRqgqjbmJSLO" %}
[Smart Contracts](/concepts/data-sources/smart-contracts.md)
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### Datafeeds

{% content-ref url="/pages/gzX3mzhfANVvXm9fUOPy" %}
[Oracles](/concepts/data-sources/oracles.md)
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### Storage

{% content-ref url="/pages/7BlbyD66mibIPZEUXE0G" %}
[Decentralized Datastorage](/concepts/data-sources/decentralized-datastorage.md)
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### Authentication & Signing

{% content-ref url="/pages/7E9WIODDSBI8dUnAOE5t" %}
[Account Abstraction modules](/concepts/data-sources/account-abstraction-modules.md)
{% endcontent-ref %}

### Frontends

{% content-ref url="/pages/eTpiE9dlBqJB5jjMLfXP" %}
[React Frontends](/concepts/data-sources/react-frontends.md)
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