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    RingMembers: StorageDescriptor<
        [
            { digest: FixedSizeBinary<4>; geohash: FixedSizeBinary<5> },
            number,
            number,
            number,
        ],
        FixedSizeBinary<32>[],
        true,
        never,
    >

    Ordered member list (Bandersnatch pubkeys) per (community, ceremony_index, reputation_level, sub_ring_index). The N/5 ring contains pubkeys of accounts that attended >= N of the last 5 ceremonies. When a level has more members than MaxRingSize, it is split into multiple sub-rings.