(**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *)

type t

val add:
  ?singleton:string ->
  commit:(unit -> unit Lwt.t) ->
  rollback:(unit -> unit Lwt.t) ->
  t ->
  unit
val with_transaction: (t -> 'a Lwt.t) -> 'a Lwt.t
