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ibc-go

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The Inter-Blockchain Communication protocol (IBC) allows blockchains to talk to each other. IBC handles transport across different sovereign blockchains. This end-to-end, connection-oriented, stateful protocol provides reliable, ordered, and authenticated communication between heterogeneous blockchains. This IBC implementation in Golang is built as a Cosmos SDK module.

Contents

  1. Core IBC Implementation

    1.1 ICS 02 Client

    1.2 ICS 03 Connection

    1.3 ICS 04 Channel

    1.4 ICS 05 Port

    1.5 ICS 23 Commitment

    1.6 ICS 24 Host

  2. Applications

    2.1 ICS 20 Fungible Token Transfers

    2.2 ICS 27 Interchain Accounts

  3. Light Clients

    3.1 ICS 07 Tendermint

    3.2 ICS 06 Solo Machine

Roadmap

For an overview of upcoming changes to ibc-go take a look at the roadmap.

Ecosystem

Discover the applications, middleware and light clients developed by other awesome teams in the ecosystem:

In the table below app refers to IBC application modules for custom use cases and middleware refers to modules that wrap an IBC application enabling custom logic to be executed.

Description Repository Type
An application that enables on chain querying of another IBC enabled chain utilizing baseapp.Query. Both chains must have implemented the query application and ICA (for queries requiring consensus). ICQ app
An application that enables on chain querying of another IBC enabled chains state without the need for the chain being queried to implement the application. interchain-queries app
An application that enables on chain querying of another IBC enabled chains state without the need for the chain being queried to implement the application. Similar to the interchain-queries application in the row above but without callbacks. query app
An application that enables cross chain NFT transfer. NFT Transfer (ICS 721) app
Middleware enabling a packet to be sent to a destination chain via an intermediate chain, e.g. going from Juno to Osmosis via the Hub. packet-forward-middleware middleware
Middleware enabling the recovery of tokens sent to unsupported addresses. recovery middleware
Middleware that limits the in or out flow of an asset in a certain time period to minimise the risks of cross chain token transfers. IBC-rate-limiting middleware

Support

We have active, helpful communities on Discord and Telegram.

For questions and support please use the new-devs-support channel in the Cosmos Network Discord server or join the IBC Gang Discord server. The issue list of this repo is exclusively for bug reports and feature requests.

To receive announcements of new releases or other technical updates, please join the IBC is expansive Telegram group.

Resources