cosmos/ibc-go v7.3.0 on GitHub

This release main additions are:

Support for JSON encoding of ICA transactions

We have added support for JSON encoding of transactions in the Interchain Accounts packet data. During ICA channel handshake it is possible, using the encoding of the channel version metadata , to indicate that the ICA transactions in the data field of InterchainAccountPacketData will be proto3 JSON encoded. See the Transaction Encoding section in the documentation for more information.

Support for ADR 8 middleware

We have added a set of optional interfaces that IBC applications can implement, so that the callbacks middleware can target these interfaces in order to get the desired callback addresses on the source and destination chains and execute actions on packet lifecycle events. See the Callbacks Middleware section in the documentation for more information.

Shout-out to @srdtrk for all the 🌟🦄 amazing🥇🙇 work on both features.

Please see the v7.3.0 changelog for the full set of changes included in this release. Please also note that this release requires a coordinated upgrade. We present here a summary of other relevant changes included in this release:

dependencies

Cosmos SDK has been bumped to v0.47.4.

light-clients/06-solomachine

Solo machines are now expected to sign data on a path that 1) does not include a connection prefix (e.g. ibc) and 2) does not escape any characters. Because of this change we recommend NOT using the solo machine light client of versions lower than v7.3.0.

To learn more about ibc-go versioning, please read our RELEASES.md.

IMPORTANT: Please read the migration guides for any versions of ibc-go that you might be going through when upgrading to this version. For example: if you upgrade from the IBC module contained in the Cosmos SDK 0.42.0 to SDK v0.47.4 and ibc-go v7.3.0, please follow: