v4.2.2

This release reverts a state-machine breaking improvement that was mistakingly released in v4.2.1 . See the v4.2.2 changelog for more details. Please do not use v4.2.1 .

Please note that the v4 release line contains a bug where fee-enabled Interchain Accounts channels cannot be reopened in case of channel closure due to packet timeout. Regular Interchain Accounts channels (i.e. non fee-enabled) can be reopened. In order to be able to reopen fee-enabled Interchain Accounts channels, please upgrade to v5.2.1 or above.

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 v0.45.10 and ibc-go v4.2.2, please follow:

• 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 .

• The migration from ibc-go v1 to v2 .

• The migration from ibc-go v2 to v3 .

• The migration from ibc-go v3 to v4 .