report_dispute_lost_unsigned: TxDescriptor<{
    dispute_proof: {
        kind: SlashingOffenceKind;
        time_slot: {
            candidate_hash: FixedSizeBinary<32>;
            session_index: number;
        };
        validator_id: FixedSizeBinary<32>;
        validator_index: number;
    };
    key_owner_proof: {
        session: number;
        trie_nodes: Binary[];
        validator_count: number;
    };
}>