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(* Open Source License                                                       *)
(* Copyright (c) 2018 Dynamic Ledger Solutions, Inc. <contact@tezos.com>     *)
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(** The shell's notion of a level: an integer indicating the number of blocks
    since genesis: genesis is 0, all other blocks have increasing levels from
    there. *)
type t

type raw_level = t

val encoding : raw_level Data_encoding.t

val rpc_arg : raw_level RPC_arg.arg

val pp : Format.formatter -> raw_level -> unit

include Compare.S with type t := raw_level

val to_int32 : raw_level -> int32

val of_int32_exn : int32 -> raw_level

val of_int32 : int32 -> raw_level tzresult

val diff : raw_level -> raw_level -> int32

val root : raw_level

val succ : raw_level -> raw_level

val pred : raw_level -> raw_level option

module Index : Storage_description.INDEX with type t = raw_level