val mixture_of :
  'a -> (('a -> Protocols.Handle.t) -> 'a -> Protocols.Handle.protocol list) -> Protocols.Handle.t

val mixture : Protocols.Handle.protocol list -> Protocols.Handle.t

module Directory : sig
  val of_properties : (string * Protocols.Handle.t) list -> Protocols.Handle.protocol

  module OfTree
      (S : Abstract.Storage.STORAGE)
      (K : Merkle.KEY with type t = string)
      (V : Merkle.VALUE) : sig
    module Tree : module type of Merkle.Interface (S) (K) (V)

    val make :
      storage:S.connection ->
      constructor:(V.t -> (Protocols.Handle.t, Concepts.Condition.condition) result) ->
      node:Tree.node ->
      Protocols.Handle.protocol
  end
end

module Associative : sig
  val of_properties :
    ( string
    * (Protocols.Handle.t option -> (Protocols.Handle.t, Concepts.Condition.condition) result) )
    list ->
    Protocols.Handle.protocol

  val update_only :
    (Protocols.Handle.t -> (Protocols.Handle.t, Concepts.Condition.condition) result) ->
    Protocols.Handle.t option ->
    (Protocols.Handle.t, Concepts.Condition.condition) result

  (** how a value is stored once a write has begun, giving its address. *)
  type 'tx admission = 'tx -> (Concepts.Hash.hash, Concepts.Condition.condition) result

  module OfTree (S : Abstract.Storage.STORAGE) (K : Merkle.KEY with type t = string) : sig
    module Tree : module type of Merkle.Make (S) (K)

    (** a value bound under a key must have an address, unless [admit]
        can read it, before the write begins, into an admission. *)
    val make :
      ?admit:
        (string ->
        Protocols.Handle.t ->
        (S.transaction admission, Concepts.Condition.condition) result ) ->
      storage:S.connection ->
      constructor:(Tree.node -> (Protocols.Handle.t, Concepts.Condition.condition) result) ->
      node:Tree.node ->
      unit ->
      Protocols.Handle.protocol
  end
end

module Addressable : sig
  module OfTree (S : Abstract.Storage.STORAGE) (K : Merkle.KEY) : sig
    module Tree : module type of Merkle.Make (S) (K)

    val make : node:Tree.node -> Protocols.Handle.protocol
  end
end