Cosmos SDK Twilight (v0.47) #6

julienrbrt · 2023-03-14T17:24:45Z

julienrbrt
Mar 14, 2023

Cosmos SDK v0.47.0 Release Notes

The Twilight release of Cosmos SDK (version 0.47) brings a number of changes to the platform, aimed at improving the overall performance and functionality of all Cosmos SDK based chains.

📝 Changelog

Check out the changelog for an exhaustive list of changes, or compare changes from last release.

Refer to the upgrading guide when migrating from v0.46.x to v0.47.0.

🚀 Highlights

Upgrade to CometBFT v0.37.0.
- With the notable introduction of ABCI 1.0.
- Changes of events keys and values from []byte to string.
Support of ABCI 1.0 in the SDK.
- Allows chains to set their own mempool implementation. Follow the guide here.
- Support of the new PrepareProposal and ProcessProposal ABCI methods.
Deprecation of the x/params module.
- Modules params are now handled directly by the modules themselves, via the MsgUpdateParams message.
- All core SDK modules have migrated away from using x/params. It is recommended to migrate your custom modules as well.
Migration from gogo/protobuf to cosmos/gogoproto.
- The SDK was using the now unmaintained gogo/protobuf library. This has been replaced by cosmos/gogoproto which is a fork of gogo/protobuf with some improvements and fixes, that is maintained by the Cosmos SDK team.
- This change is not transparent for applications developers. All proto files should be regenerated with the new library.
- Use the ghcr.io/cosmos/proto-builder image (version >= 0.11.5) for generating protobuf files.
App Wiring with dependency injection.
- App Wiring is ready for community feedback. It allows developers to build a chain with less boilerplate by removing the need to manually wire a chain.
- Community feedback will be implemented in the following releases which can lead to API breakage (runtime and depinject are pre-1.0).
- Manually wiring an application is still possible and will always remain supported.
Removal of the proposer-based rewards from x/distribution.
- This removes unfairness towards smaller validators.
Re-addition of title and summary fields on group and gov proposals.
- In v0.46 with x/gov v1, these fields were not present (while present in v1beta1). After community feedback, they have been added in x/gov v1.
Refactoring of tests in the SDK and addition of the simtestutil package, for facilitating testing without depending on simapp.
- Any dependencies on simapp in an application must be removed going forward.