cosmos/ibc-go v7.3.0-rc1 on GitHub

This pre-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 (link to v1.0.0 release not available yet) 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.

Additionally, this release also makes an improvement to 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.

Please see the v7.3.0-rc1 changelog for the full set of changes included in this pre-release.

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-rc1, please follow: