---
title: "proof/executor"
description: "no_std stateless OP Stack block builder that runs the EVM inside the FPVM."
source: https://basehub.org/crates/proof/executor/
---
import { LinkCard } from '@astrojs/starlight/components';

## Overview

The `proof/executor` sub-crate (`kona-executor`) is part of the [proof crate group](/crates/proof/overview/).

It builds OP Stack blocks statelessly inside the FPVM, executing the EVM against witness data supplied through the preimage oracle.

## Source

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