Awesome

frame-metadata

Defines FRAME metadata types for Substrate runtimes.

Originally part of the substrate repository, it was extracted here as part of https://github.com/paritytech/substrate/pull/8615.

Versioning

Starting from v8, all historical metadata type definitions are retained. These can be enabled via features e.g. v13. The latest version is enabled by default. All legacy versions are available under the legacy feature.

Tooling

The intention is to provide tooling here in the future to handle the different versions of metadata.