(*****************************************************************************)
(*                                                                           *)
(* Open Source License                                                       *)
(* Copyright (c) 2022 Marigold <contact@marigold.dev>                        *)
(* Copyright (c) 2022 Nomadic Labs <contact@nomadic-labs.com>                *)
(* Copyright (c) 2022 Oxhead Alpha <info@oxhead-alpha.com>                   *)
(*                                                                           *)
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(* copy of this software and associated documentation files (the "Software"),*)
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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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(* DEALINGS IN THE SOFTWARE.                                                 *)
(*                                                                           *)
(*****************************************************************************)

let record ctxt tx_rollup level ~message_position =
  Storage.Tx_rollup.Revealed_withdrawals.find (ctxt, tx_rollup) level
  >>=? fun (ctxt, revealed_withdrawals_opt) ->
  Bitset.add
    (Option.value ~default:Bitset.empty revealed_withdrawals_opt)
    message_position
  >>?= fun revealed_withdrawals ->
  Storage.Tx_rollup.Revealed_withdrawals.add
    (ctxt, tx_rollup)
    level
    revealed_withdrawals
  >>=? fun (ctxt, _new_size, _is_new) -> return ctxt
(* See {{Note}} in [Tx_rollup_commitment_storage] for a rationale on
   why ignoring storage allocation is safe. *)

let mem ctxt tx_rollup level ~message_position =
  Storage.Tx_rollup.Revealed_withdrawals.find (ctxt, tx_rollup) level
  >>=? fun (ctxt, revealed_withdrawals_opt) ->
  match revealed_withdrawals_opt with
  | Some field ->
      Bitset.mem field message_position >>?= fun res -> return (ctxt, res)
  | None -> return (ctxt, false)

let remove ctxt tx_rollup level =
  Storage.Tx_rollup.Revealed_withdrawals.remove (ctxt, tx_rollup) level
  >>=? fun (ctxt, _freed_size, _existed) -> return ctxt
(* See {{Note}} in [Tx_rollup_commitment_storage] for a rationale on
   why ignoring storage allocation is safe. *)