(*****************************************************************************)
(*                                                                           *)
(* Open Source License                                                       *)
(* Copyright (c) 2018 Dynamic Ledger Solutions, Inc. <contact@tezos.com>     *)
(*                                                                           *)
(* Permission is hereby granted, free of charge, to any person obtaining a   *)
(* copy of this software and associated documentation files (the "Software"),*)
(* to deal in the Software without restriction, including without limitation *)
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(* Software is furnished to do so, subject to the following conditions:      *)
(*                                                                           *)
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(* DEALINGS IN THE SOFTWARE.                                                 *)
(*                                                                           *)
(*****************************************************************************)

type shell_header = {
  level : Int32.t;  (** Height of the block, from the genesis block. *)
  proto_level : int;
      (* uint8 *)
      (** Number of protocol changes since genesis modulo 256. *)
  predecessor : Block_hash.t;  (** Hash of the preceding block. *)
  timestamp : Time.Protocol.t;
      (** Timestamp at which the block is claimed to have been created. *)
  validation_passes : int;
      (* uint8 *)
      (** Number of validation passes (also number of lists of operations). *)
  operations_hash : Operation_list_list_hash.t;
      (** Hash of the list of lists (actually root hashes of merkle trees)
      of operations included in the block. There is one list of
      operations per validation pass. *)
  fitness : Fitness.t;
      (** A sequence of sequences of unsigned bytes, ordered by length and
      then lexicographically. It represents the claimed fitness of the
      chain ending in this block. *)
  context : Context_hash.t;
      (** Hash of the state of the context after application of this block. *)
}

val shell_header_encoding : shell_header Data_encoding.t

type t = {shell : shell_header; protocol_data : Bytes.t}

include S.HASHABLE with type t := t and type hash := Block_hash.t

val of_bytes_exn : Bytes.t -> t

val to_b58check : t -> string

val of_b58check : string -> t option

val bounded_encoding : ?max_size:int -> unit -> t Data_encoding.t

val get_forced_protocol_upgrade :
  user_activated_upgrades:User_activated.upgrades ->
  level:Int32.t ->
  Protocol_hash.t option

val get_voted_protocol_overrides :
  user_activated_protocol_overrides:User_activated.protocol_overrides ->
  Protocol_hash.t ->
  Protocol_hash.t option