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module Level_map =
  Aches.Vache.Map (Aches.Vache.FIFO_Precise) (Aches.Vache.Strong)
    (struct
      include Int32

      let hash = Hashtbl.hash
    end)

type shard_indices = {start_index : int; offset : int}

type committee = shard_indices Tezos_crypto.Signature.Public_key_hash.Map.t

type t = committee Level_map.t

let create ~max_size = Level_map.create max_size

let find t ~level = Level_map.find_opt t level

let add t ~level ~committee = Level_map.replace t level committee