ibc-rs

Rust implementation of the Inter-Blockchain Communication (IBC) protocol.

This project comprises primarily seven crates:

• The ibc crate defines the main data structures and on-chain logic for the IBC protocol.
• The ibc-chain-registry provides functions to fetch data from the chain registry and automatically generate chain configuration for hermes.
• The ibc-relayer crate provides an implementation of an IBC relayer, as a library.
• The ibc-relayer-cli crate is a CLI (a wrapper over the ibc-relayer library), comprising the hermes binary.
• The ibc-proto crate is a library with Rust types generated from .proto definitions necessary for interacting with Cosmos SDK and its IBC structs.
• The ibc-telemetry crate is a library for use in the hermes CLI, for gathering telemetry data and exposing that in a Prometheus endpoint.
• The ibc-test-framework crate provides the infrastructure and framework for writing end-to-end (E2E) tests that include the spawning of the relayer together with Cosmos full nodes.

See the table below for more details.

Includes TLA+ specifications.

Crate name	Type	Version	Docs
ibc	lib
ibc-relayer	lib
ibc-relayer-cli	bin: hermes
ibc-relayer-rest	lib
ibc-proto	lib
ibc-telemetry	lib
ibc-test-framework	lib
ibc-chain-registry	lib

Requirements

The crates in this project require the latest stable version of Rust: 1.60.0.

Hermes Guide

The relayer CLI binary, called hermes, has a comprehensive guide at hermes.informal.systems.

Contributing

IBC is specified in English in the cosmos/ibc repo. Any protocol changes or clarifications should be contributed there.

This repo contains the TLA+ specification and Rust implementation for the IBC modules and relayer. If you're interested in contributing, please comment on an issue or open a new one!

See also CONTRIBUTING.md.

Versioning

We follow Semantic Versioning, though APIs are still under active development.

Resources

• IBC Website
• IBC Specification
• IBC Modules in Go
• IBC Relayer in Typescript
• IBC Relayer in Go

License

Copyright © 2022 Informal Systems Inc. and ibc-rs authors.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use the files in this repository except in compliance with the License. You may obtain a copy of the License at

https://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.