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Interchain Standards

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Synopsis

This repository is the canonical location for development and documentation of inter-chain standards utilised by the Cosmos network & interchain ecosystem.

It shall be used to consolidate design rationale, protocol semantics, and encoding descriptions for the inter-blockchain protocol (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.

The rendered, ordered set of all interchain standards written so far can be read as a single PDF.

Ecosystem

For a list of IBC implementations, IBC-supporting blockchains, and special IBC bridges, see ECOSYSTEM.md.

To add your project to this list, submit a pull request.

Learn more about the IBC Ecosystem Working Group.

Check out a list of frequently asked questions.

Standardisation

Please see ICS 1 for a description of what a standard entails.

To propose a new standard, open an issue.

To start a new standardisation document, copy the template and open a PR.

See PROCESS.md for a description of the standardisation process.

Learn more about the IBC Steering Committee.

IBC Quick References

If you are planning to review inter-blockchain communication protocol specifications, the following are required reading:

Translated versions of some of these documents can be found in the translation folder.

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 Kind Standard Title Stage
1 Meta ICS Specification Standard Draft

IBC/TAO

Interchain Standard Number Kind Standard Title Stage
2 Interface Client Semantics Draft
3 Instantiation Connection Semantics Draft
4 Instantiation Channel & Packet Semantics Draft
5 Interface Port Allocation Draft
6 Instantiation Solo Machine Client Draft
7 Instantiation Tendermint Client Draft
18 Interface Relayer Algorithms Draft
23 Interface Vector Commitments Draft
24 Interface Host Requirements Draft
25 Interface Handler Interface Draft
26 Interface Routing Module Draft

IBC/APP

Interchain Standard Number Kind Standard Title Stage
20 Instantiation Fungible Token Transfer Draft
27 Instantiation Interchain Accounts Draft

Standard Dependency Visualisation

Directed arrows indicate a dependency relationship (that origin depends on destination).

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