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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