@polkadot/types/interfaces/metadata/runtime.js

Implementation of the Parity codec

const META_V1_TO_V2 = {
    metadata: {
        description: 'Returns the metadata of a runtime',
        params: [],
        type: 'OpaqueMetadata'
    }
};
export const runtime = {
    Metadata: [
        {
            methods: {
                metadata_at_version: {
                    description: 'Returns the metadata at a given version.',
                    params: [
                        {
                            name: 'version',
                            type: 'u32'
                        }
                    ],
                    type: 'Option<OpaqueMetadata>'
                },
                metadata_versions: {
                    description: 'Returns the supported metadata versions.',
                    params: [],
                    type: 'Vec<u32>'
                },
                ...META_V1_TO_V2
            },
            version: 2
        },
        {
            methods: {
                ...META_V1_TO_V2
            },
            version: 1
        }
    ]
};