# Optimism

## Introduction

[**Optimism**](https://www.optimism.io/) is a Layer 2 scaling solution for Ethereum that employs Optimistic Rollups to significantly improve transaction throughput and reduce gas fees. It provides a seamless experience for developers and users alike, offering a highly-scalable environment for building and deploying Ethereum-based decentralized applications (dApps). Optimism aims to address the scalability challenges of Ethereum while maintaining compatibility with existing Ethereum development tools and resources.

### **Chain Information**

{% embed url="<https://community.optimism.io/>" %}
Official Documentation
{% endembed %}

| chainId (int) | chainName (string) | EVM Chains              |
| ------------- | ------------------ | ----------------------- |
| 10            | optimism           | Optimism Mainnet        |
| 420           | optimism           | Optimism Testnet Goerli |