The Interoperable State Machine Protocol

Rust implementation of the Interoperable State Machine Protocol. This library is intended to aid state machines communicate over ISMP with other ISMP supported state machines.

Overview

This repo provides an implementation of the neccessary components laid out in the ISMP protocol specification.

• Message Definitions
• Message Handlers
• ConsensusClient and StateMachineClient definitions
• IsmpHost definitions
• IsmpRouter definitions
• IsmpDispatcher definitions

NOTE: All timestamps are denominated in seconds Some useful imports in the crate prelude.

Rust implementation of the Interoperable State Machine Protocol. This project is funded by the web3 foundation.

Overview

This repo provides an implementation of the neccessary components laid out in the ISMP specifications.

• Message Definitions
• Message Handlers
• ConsensusClient and StateMachineClient definitions
• IsmpHost definitions
• IsmpRouter definitions
• IsmpDispatcher definitions

License

This library is licensed under the Apache 2.0 License, Copyright (c) 2025 Polytope Labs.