This release retracts versions v4.1.2 and v4.2.1 since they were erroneously released with a state-machine breaking improvement. See the v4.4.2 changelog for more information.
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 v0.45.15 and ibc-go v4.4.2, please follow: