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    register_participant: TxDescriptor<
        {
            cid: { digest: FixedSizeBinary<4>; geohash: FixedSizeBinary<5> };
            proof?: {
                attendee_public: SS58String;
                attendee_signature: Enum<
                    {
                        Ecdsa: FixedSizeBinary<65>;
                        Ed25519: FixedSizeBinary<64>;
                        Eth: FixedSizeBinary<65>;
                        Sr25519: FixedSizeBinary<64>;
                    },
                >;
                ceremony_index: number;
                community_identifier: {
                    digest: FixedSizeBinary<4>;
                    geohash: FixedSizeBinary<5>;
                };
                prover_public: SS58String;
            };
        },
    >