cosmos/ibc-go v4.0.0-rc2

on GitHub

This release includes v1 of the Fee Middleware module. 🍾 Please read the introduction blog post and the documentation!

It also bumps the Go version to v1.18 and the Cosmos SDK to v0.45.6 (for more information, see Cosmos SDK v0.45.6 Release Notes), and introduces several improvements and bug fixes. We present here a summary of the most relevant changes in comparison to v4.0.0-rc1. Please see the v4.0.0 changelog for the full set of changes included in this pre-release.

core/03-connection

• The PreviousConnectionID argument has been removed from NewMsgConnectionOpenTry. MsgConnectionOpenTry.ValidateBasic() returns now an error if the deprecated PreviousConnectionID is not empty.

core/04-channel

• The PreviousChannelID argument has been removed from NewMsgChannelOpenTry. MsgChannelOpenTry.ValidateBasic() returns now an error if the deprecated PreviousChannelID is not empty.

apps/29-fee

• The import/export for genesis upgrades has been fixed.

Special thanks to our external contributors on this release: @faddat @vuong177

This is potentially the last RC before the final v4.0.0 release. If no issues are found, in approximately two weeks the final release will be created.

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 v0.45.6 and ibc-go v4.0.0-rc2, please follow:

1. The migration from SDK 0.41.x or 0.42.x to the IBC module in the ibc-go repository based on the SDK v0.44.x.
2. The migration from ibc-go v1 to v2.
3. The migration from ibc-go v2 to v3.
4. The migration from ibc-go v3 to v4.