upgrade_registration: TxDescriptor<{
    cid: {
        digest: FixedSizeBinary<4>;
        geohash: FixedSizeBinary<5>;
    };
    proof: {
        attendee_public: SS58String;
        attendee_signature: MultiSignature;
        ceremony_index: number;
        community_identifier: {
            digest: FixedSizeBinary<4>;
            geohash: FixedSizeBinary<5>;
        };
        prover_public: SS58String;
    };
}>