MUD logo

MUD - Engine for Autonomous Worlds


MUD is a framework for complex Ethereum applications.

It adds some conventions for organizing data and logic and abstracts away low-level complexities so you can focus on the features of your app.

It standardizes the way data is stored on-chain. With this standard data model, MUD can provide all network code to synchronize contract and client state. This includes synchronizing state directly from an RPC node or a general-purpose MUD indexer.

MUD is MIT-licensed, open source and free to use.

# Features

MUD features
MUD features

# Today

  • State synchronization between contracts and clients without custom networking code
  • General purpose indexers (without custom indexing code)
  • Seamless contract upgrades (+ automatic contract upgrades during development)
  • Shared contract state
  • Optimistic updates
  • Automatic type generation for contracts and systems
  • Query language to interact with contract state
  • Data explorer to inspect and modify contract and local state
  • Bitpacking utilities

# Soon

  • Local simulation of transactions (including optimistic state)
  • Built-in support for account abstraction
  • Contract package manager

# Quickstart

pnpm create mud my-project

Scaffolding a new project with the MUD CLI.
Scaffolding a new project with the MUD CLI.

# Packages

MUD consists of several libraries. They can be used independently, but are best used together.

Package Version
Solidity Entity Component System library
npm version
TypeScript networking library for automatic contract/client state sync
npm version
TypeScript Reactive Entity Component System library
npm version
Go services for indexer, faucet, message relay
npm version
Command line interface for types, testing, faucet, deployment and more
npm version
Solidity standard library
npm version
Typescript standard library
npm version
Solidity and AssemblyScript implementations of Perlin noise
npm version

# Contribute

We'd love your support in improving MUD! This monorepo includes all of MUD's source code, and pull requests are always welcome. To discuss new features or changes join our Discord.

# Local development setup

  1. Install go (required to build packages/services): https://go.dev/doc/install

  2. Install the foundry toolkit (required to build and test MUD solidity packages): https://getfoundry.sh/

  3. Install pnpm

npm install pnpm --global
  1. Clone the MUD monorepo
git clone https://github.com/latticexyz/mud
  1. Install MUD dependencies and setup local environment
cd mud && pnpm install

# Pull requests

MUD follows the conventional commit specification for commit messages and PR titles. Please keep the scope of your PR small (rather open multiple small PRs than one huge PR) and follow the conventional commit spec.

# Library

# Community support

Join our Discord to get support and connect with the community!

# License

MUD is open-source software licensed as MIT.