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.
For a high-level explanation of what IBC is and how it works, please read this blog post.
All standards at or past the "Draft" stage are listed here in order of their ICS numbers, sorted by category.
| Interchain Standard Number | Standard Title | Stage |
|---|---|---|
| 1 | ICS Specification Standard | N/A |
| Interchain Standard Number | Standard Title | Stage | Implementations |
|---|---|---|---|
| 2 | Client Semantics | Candidate | ibc-go |
| 3 | Connection Semantics | Candidate | ibc-go |
| 4 | Channel & Packet Semantics | Candidate | ibc-go |
| 5 | Port Allocation | Candidate | ibc-go |
| 23 | Vector Commitments | Candidate | ibc-go |
| 24 | Host Requirements | Candidate | ibc-go |
| 25 | Handler Interface | Candidate | ibc-go |
| 26 | Routing Module | Candidate | ibc-go |
| Interchain Standard Number | Standard Title | Stage | Implementations |
|---|---|---|---|
| 6 | Solo Machine Client | Candidate | ibc-go |
| 7 | Tendermint Client | Candidate | ibc-go |
| 8 | Wasm Client | Draft | |
| 10 | GRANDPA Client | Draft |
| Interchain Standard Number | Standard Title | Stage | Implementations |
|---|---|---|---|
| 18 | Relayer Algorithms | Finalised | go-relayer, rust-relayer, ts-relayer |
| Interchain Standard Number | Standard Title | Stage | Implementations |
|---|---|---|---|
| 20 | Fungible Token Transfer | Candidate | ibc-go |
| 27 | Interchain Accounts | Candidate | ibc-go |
| 28 | Cross-Chain Validation | Draft | |
| 29 | General Relayer Incentivisation Mechanism | Candidate | ibc-go |
| 30 | IBC Application Middleware | N/A | N/A |
| 31 | Cross-Chain Queries | Draft | N/A |
| 721 | Non-Fungible Token Transfer | Candidate | bianjieai |
The Interchain Standards are also translated into the following languages: