---
title: "execution/exex"
description: "Execution Extensions for OP-Reth, including the proofs ExEx that emits trie updates."
source: https://basehub.org/crates/execution/exex/
---
import { LinkCard } from '@astrojs/starlight/components';

## Overview

The `execution/exex` sub-crate (`reth-optimism-exex`) is part of the [execution crate group](/crates/execution/overview/).

It hosts Execution Extensions for OP-Reth, including the proofs ExEx that streams trie updates alongside committed blocks.

## Source

<LinkCard title="View source on GitHub" href="https://github.com/base/base/tree/main/crates/execution/exex" />