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

const GRANDPA_V2_V3 = {
    generate_key_ownership_proof: {
        description: 'Generates a proof of key ownership for the given authority in the given set.',
        params: [
            {
                name: 'setId',
                type: 'SetId'
            },
            {
                name: 'authorityId',
                type: 'AuthorityId'
            }
        ],
        type: 'Option<OpaqueKeyOwnershipProof>'
    },
    grandpa_authorities: {
        description: 'Get the current GRANDPA authorities and weights. This should not change except for when changes are scheduled and the corresponding delay has passed.',
        params: [],
        type: 'AuthorityList'
    },
    submit_report_equivocation_unsigned_extrinsic: {
        description: 'Submits an unsigned extrinsic to report an equivocation.',
        params: [
            {
                name: 'equivocationProof',
                type: 'GrandpaEquivocationProof'
            },
            {
                name: 'keyOwnerProof',
                type: 'OpaqueKeyOwnershipProof'
            }
        ],
        type: 'Option<Null>'
    }
};
export const runtime = {
    GrandpaApi: [
        {
            methods: {
                current_set_id: {
                    description: 'Get current GRANDPA authority set id.',
                    params: [],
                    type: 'SetId'
                },
                ...GRANDPA_V2_V3
            },
            version: 3
        },
        {
            methods: GRANDPA_V2_V3,
            version: 2
        }
    ]
};