Source file `metrics_plugin.ml`

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(*****************************************************************************)
(*                                                                           *)
(* Open Source License                                                       *)
(* Copyright (c) 2022 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.                    *)
(*                                                                           *)
(* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR*)
(* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,  *)
(* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL   *)
(* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER*)
(* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING   *)
(* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER       *)
(* DEALINGS IN THE SOFTWARE.                                                 *)
(*                                                                           *)
(*****************************************************************************)

open Protocol
open Alpha_context

let update_metrics ~protocol_metadata (fitness : Tezos_base.Fitness.t)
    update_metrics_callback =
  let open Lwt_result_syntax in
  let*! _ =
    let*! (r :
            ( unit,
              Environment.Error_monad.error Environment.Error_monad.trace )
            result) =
      let*? round = Alpha_context.Fitness.round_from_raw fitness in
      let proto_metrics =
        match
          Data_encoding.Binary.of_bytes_opt
            Protocol.block_header_metadata_encoding
            protocol_metadata
        with
        | None ->
            (* this is the case of the genesis block and the activation block
               in a sandbox environment *)
            None
        | Some protocol_data ->
            let cycle =
              Int32.to_float (Cycle.to_int32 protocol_data.level_info.cycle)
            in
            let consumed_gas =
              Z.to_float
                (Gas.Arith.integral_to_z
                   (Gas.Arith.ceil protocol_data.consumed_gas))
            in
            Some (cycle, consumed_gas)
      in
      match proto_metrics with
      | Some (cycle, consumed_gas) ->
          return
          @@ update_metrics_callback
               ~cycle
               ~consumed_gas
               ~round:(Int32.to_float (Round.to_int32 round))
      | None -> return_unit
    in
    Lwt.return @@ Environment.wrap_tzresult r
  in
  Lwt.return_unit