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(*                                                                           *)
(* Open Source License                                                       *)
(* Copyright (c) 2018 Dynamic Ledger Solutions, Inc. <contact@tezos.com>     *)
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(* copy of this software and associated documentation files (the "Software"),*)
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(* DEALINGS IN THE SOFTWARE.                                                 *)
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type t = private
  | Implicit of Signature.Public_key_hash.t
  | Originated of Contract_hash.t
type contract = t

include Compare.S with type t := contract

(** {2 Implicit contracts} *)

val implicit_contract : Signature.Public_key_hash.t -> contract

(** Only for migration from proto_004  *)
val originated_contract_004 : Contract_hash.t -> contract

val is_implicit : contract -> Signature.Public_key_hash.t option

(** {2 Originated contracts} *)

(** Originated contracts handles are crafted from the hash of the
    operation that triggered their origination (and nothing else).
    As a single operation can trigger several originations, the
    corresponding handles are forged from a deterministic sequence of
    nonces, initialized with the hash of the operation. *)
type origination_nonce

val originated_contract : origination_nonce -> contract

val originated_contracts : since: origination_nonce -> until: origination_nonce -> contract list

val initial_origination_nonce : Operation_hash.t -> origination_nonce

val incr_origination_nonce : origination_nonce -> origination_nonce

val is_originated : contract -> Contract_hash.t option


(** {2 Human readable notation} *)

type error += Invalid_contract_notation of string (* `Permanent *)

val to_b58check: contract -> string

val of_b58check: string -> contract tzresult

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

val pp_short: Format.formatter -> contract -> unit

(** {2 Serializers} *)

val encoding : contract Data_encoding.t

val origination_nonce_encoding : origination_nonce Data_encoding.t

val rpc_arg : contract RPC_arg.arg

module Index : Storage_description.INDEX with type t = t