(*****************************************************************************)
(*                                                                           *)
(* 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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(* in all copies or substantial portions of the Software.                    *)
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(* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,  *)
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(* DEALINGS IN THE SOFTWARE.                                                 *)
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type t = Unaccounted | Limited of {remaining : Z.t}

type internal_gas

val encoding : t Data_encoding.encoding

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

type cost

val cost_encoding : cost Data_encoding.encoding

val pp_cost : Format.formatter -> cost -> unit

type error += Block_quota_exceeded (* `Temporary *)

type error += Operation_quota_exceeded (* `Temporary *)

val consume :
  Z.t -> t -> internal_gas -> cost -> (Z.t * t * internal_gas) tzresult

val check_enough : Z.t -> t -> internal_gas -> cost -> unit tzresult

val internal_gas_zero : internal_gas

val free : cost

val atomic_step_cost : int -> cost

val step_cost : int -> cost

val alloc_cost : int -> cost

val alloc_bytes_cost : int -> cost

val alloc_mbytes_cost : int -> cost

val alloc_bits_cost : int -> cost

val read_bytes_cost : Z.t -> cost

val write_bytes_cost : Z.t -> cost

val ( *@ ) : int -> cost -> cost

val ( +@ ) : cost -> cost -> cost