---
title: OP Stack codebase V1 - Bedrock
lang: en-US
---

## Overview

The first release of the OP Stack codebase is called **Bedrock**. 
The Bedrock release primarily consists of the core software required to run L2 blockchains and was originally designed to power an upgrade to the Optimism Mainnet network.

## Resources

### Rollup Protocol

Learn about the basics of the Rollup protocol used by Bedrock on the [Rollup Protocol](https://community.optimism.io/docs/protocol/2-rollup-protocol/) page.

### Bedrock Explainer

Learn all about the Bedrock release of the OP Stack by reading the [Bedrock Explainer](./explainer.md).

### Specifications

Dive deep into the specifications for the Bedrock release in the [specs folder of the Optimism Monorepo](https://github.com/ethereum-optimism/optimism/blob/d69cb12f6dcbe3d5355beca8997fbac611b7fe37/specs/README.md).

## Components

- [`op-node`](https://github.com/ethereum-optimism/optimism/tree/d69cb12f6dcbe3d5355beca8997fbac611b7fe37/op-node)
- [`op-geth`](https://github.com/ethereum-optimism/op-geth)
- [`op-batcher`](https://github.com/ethereum-optimism/optimism/tree/d69cb12f6dcbe3d5355beca8997fbac611b7fe37/op-batcher)
- [`op-proposer`](https://github.com/ethereum-optimism/optimism/tree/d69cb12f6dcbe3d5355beca8997fbac611b7fe37/op-proposer)
- [`contracts-bedrock`](https://github.com/ethereum-optimism/optimism/tree/d69cb12f6dcbe3d5355beca8997fbac611b7fe37/packages/contracts-bedrock)
- [`fault-detector`](https://github.com/ethereum-optimism/optimism/tree/d69cb12f6dcbe3d5355beca8997fbac611b7fe37/packages/fault-detector)
- [`sdk`](https://github.com/ethereum-optimism/optimism/tree/d69cb12f6dcbe3d5355beca8997fbac611b7fe37/packages/sdk)
- [`chain-mon`](https://github.com/ethereum-optimism/optimism/tree/d69cb12f6dcbe3d5355beca8997fbac611b7fe37/packages/chain-mon)