(*****************************************************************************)
(*                                                                           *)
(* Open Source License                                                       *)
(* Copyright (c) 2018 Dynamic Ledger Solutions, Inc. <contact@tezos.com>     *)
(* Copyright (c) 2018-2021 Nomadic Labs. <contact@nomadic-labs.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 *)
(* the rights to use, copy, modify, merge, publish, distribute, sublicense,  *)
(* and/or sell copies of the Software, and to permit persons to whom the     *)
(* Software is furnished to do so, subject to the following conditions:      *)
(*                                                                           *)
(* The above copyright notice and this permission notice shall be included   *)
(* in all copies or substantial portions of the Software.                    *)
(*                                                                           *)
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(* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,  *)
(* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL   *)
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(* DEALINGS IN THE SOFTWARE.                                                 *)
(*                                                                           *)
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type block_error =
  | Cannot_parse_operation of Operation_hash.t
  | Invalid_fitness of {expected : Fitness.t; found : Fitness.t}
  | Non_increasing_timestamp
  | Non_increasing_fitness
  | Invalid_level of {expected : Int32.t; found : Int32.t}
  | Invalid_proto_level of {expected : int; found : int}
  | Replayed_operation of Operation_hash.t
  | Outdated_operation of {
      operation : Operation_hash.t;
      originating_block : Block_hash.t;
    }
  | Expired_chain of {
      chain_id : Chain_id.t;
      expiration : Time.Protocol.t;
      timestamp : Time.Protocol.t;
    }
  | Unexpected_number_of_validation_passes of int (* uint8 *)
  | Too_many_operations of {pass : int; found : int; max : int}
  | Oversized_operation of {operation : Operation_hash.t; size : int; max : int}
  | Unallowed_pass of {
      operation : Operation_hash.t;
      pass : int;
      allowed_pass : int option;
    }
  | Cannot_parse_block_header
  | Economic_protocol_error
  | Invalid_protocol_environment_transition of
      Protocol.env_version * Protocol.env_version

type validation_process_error =
  | Missing_handshake
  | Inconsistent_handshake of string
  | Protocol_dynlink_failure of string
  | Socket_path_too_long of string
  | Socket_path_wrong_permission of string
  | Cannot_run_external_validator of string

type error +=
  | Invalid_block of {block : Block_hash.t; error : block_error}
  | Unavailable_protocol of {block : Block_hash.t; protocol : Protocol_hash.t}
  | Inconsistent_operations_hash of {
      block : Block_hash.t;
      expected : Operation_list_list_hash.t;
      found : Operation_list_list_hash.t;
    }
  | Applying_non_validated_block of Block_hash.t
  | Failed_to_checkout_context of Context_hash.t
  | System_error of {errno : string; fn : string; msg : string}
  | Missing_test_protocol of Protocol_hash.t
  | Validation_process_failed of validation_process_error
  | Cannot_validate_while_shutting_down

val invalid_block : Block_hash.t -> block_error -> error