what's MUD?

MUD is an open-source framework designed to simplify the development of onchain applications and autonomous worlds on Ethereum and other EVM-compatible blockchains. It addresses key challenges in smart contract state management by introducing a modular architecture that decouples application logic from the underlying blockchain, enabling developers to build complex, interactive experiences with reduced complexity. At its core, MUD uses an Entity-Component-System (ECS) pattern adapted for blockchain, where state is stored in tables that can be queried and updated efficiently. This allows for real-time synchronization between onchain data and offchain clients, making it ideal for games, social apps, and decentralized simulations. Developers define schemas for tables, write contracts in Solidity, and deploy worlds with simple CLI commands, while tools like the world explorer provide immediate access to functions and state. The framework integrates with existing Ethereum tooling and supports multichain deployments, fostering composability across ecosystems. By handling indexing, syncing, and gas optimization automatically, MUD empowers builders to focus on creativity rather than boilerplate code, as seen in hackathons and prototypes like onchain games.

MUD is audited, open source, feature complete, with a migration tool; Lattice is shutting down.