---
title: "execution/payload"
description: "Builds OP execution payloads from pending transactions for the engine API."
source: https://basehub.org/crates/execution/payload/
---
import { LinkCard } from '@astrojs/starlight/components';

## Overview

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

It builds OP execution payloads from the pending transaction set, returning blocks ready for the engine API to commit.

## Source

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