tkzktk / ibc

Interchain Standards (ICS) for the Cosmos network & interchain ecosystem.

IBC

Synopsis

This repository is the canonical location for development and documentation of the inter-blockchain communication protocol (IBC).

It shall be used to consolidate design rationale, protocol semantics, and encoding descriptions for IBC, including both the core transport, authentication, & ordering layer (IBC/TAO) and the application layers describing packet encoding & processing semantics (IBC/APP).

Contributions are welcome. See CONTRIBUTING.md for contribution guidelines.

See ROADMAP.md for a public up-to-date version of our roadmap.

What is IBC?

For a high-level explanation of what IBC is and how it works, please read this blog post.

Interchain Standards

All standards at or past the "Draft" stage are listed here in order of their ICS numbers, sorted by category.

Meta

Interchain Standard Number	Standard Title	Stage	Maintainer
1	ICS Specification Standard	N/A	Protocol team

Core

Interchain Standard Number	Standard Title	Stage	Implementations	Maintainer
2	Client Semantics	Candidate	ibc-go	Protocol team
3	Connection Semantics	Candidate	ibc-go	Protocol team
4	Channel & Packet Semantics	Candidate	ibc-go	Protocol team
5	Port Allocation	Candidate	ibc-go	Protocol team
23	Vector Commitments	Candidate	ibc-go	Protocol team
24	Host Requirements	Candidate	ibc-go	Protocol team
25	Handler Interface	Candidate	ibc-go	Protocol team
26	Routing Module	Candidate	ibc-go	Protocol team
33	Multi-hop Messaging	Candidate	ibc-go	Protocol team

Client

Interchain Standard Number	Standard Title	Stage	Implementations	Maintainer
6	Solo Machine Client	Candidate	ibc-go	Protocol team
7	Tendermint Client	Candidate	ibc-go	Protocol team
8	Wasm Client	Draft		Protocol team / Composable Finance
9	Loopback Client	Draft	ibc-go	Protocol team
10	GRANDPA Client	Draft		Octopus Network

Relayer

Interchain Standard Number	Standard Title	Stage	Implementations	Maintainer
18	Relayer Algorithms	Finalized	go-relayer, rust-relayer, ts-relayer	Protocol team

App

Interchain Standard Number	Standard Title	Stage	Implementations	Maintainer
20	Fungible Token Transfer	Candidate	ibc-go	Protocol team
27	Interchain Accounts	Candidate	ibc-go	Protocol team
28	Cross-Chain Validation	Draft		Protocol team
29	General Relayer Incentivization Mechanism	Candidate	ibc-go	Protocol team
30	IBC Application Middleware	N/A	N/A	Protocol team
31	Cross-Chain Queries	Draft	N/A	Protocol team
32	Interchain Queries	Candidate	async-icq	Strangelove Ventures
100	Interchain Atomic Swap	Candidate	ibcswap	Side Labs
721	Non-Fungible Token Transfer	Candidate	nft-transfer	IRIS Network

Translations

The Interchain Standards are also translated into the following languages:

• Chinese