diff --git a/src/lib_protocol_environment_sigs/v1/RPC_path.mli b/src/lib_protocol_environment_sigs/v1/RPC_path.mli
index 8fdd626bf..1fbe98e2b 100644
--- a/src/lib_protocol_environment_sigs/v1/RPC_path.mli
+++ b/src/lib_protocol_environment_sigs/v1/RPC_path.mli
@@ -28,9 +28,3 @@ val add_final_args:
   ('prefix, 'params) path -> 'a RPC_arg.t -> ('prefix, 'params * 'a list) path
 val (/:*):
   ('prefix, 'params) path -> 'a RPC_arg.t -> ('prefix, 'params * 'a list) path
-
-val prefix:
-  ('prefix, 'a) path -> ('a, 'params) path -> ('prefix, 'params) path
-
-val map:
-  ('a -> 'b) -> ('b -> 'a) -> ('prefix, 'a) path -> ('prefix, 'b) path
diff --git a/src/lib_protocol_environment_sigs/v1/RPC_service.mli b/src/lib_protocol_environment_sigs/v1/RPC_service.mli
index b81f53970..0fac2a381 100644
--- a/src/lib_protocol_environment_sigs/v1/RPC_service.mli
+++ b/src/lib_protocol_environment_sigs/v1/RPC_service.mli
@@ -43,19 +43,6 @@ val error_encoding:
   ('meth, 'prefix, 'params, 'query, 'input, 'output) service ->
   unit Data_encoding.t
 
-val prefix:
-  ('prefix, 'inner_prefix) RPC_path.t ->
-  ('meth, 'inner_prefix, 'params, 'query,
-   'input, 'output) service ->
-  ('meth, 'prefix, 'params,
-   'query, 'input, 'output) service
-
-val map:
-  ('a -> 'b) ->
-  ('b -> 'a) ->
-  ('meth, 'pr, 'a, 'q, 'i, 'o) service ->
-  ('meth, 'pr, 'b, 'q, 'i, 'o) service
-
 val get_service:
   ?description: string ->
   query: 'query RPC_query.t ->
diff --git a/vendors/ocplib-resto/lib_ezresto-directory/test/ezDirectory.ml b/vendors/ocplib-resto/lib_ezresto-directory/test/ezDirectory.ml
index f909c77b8..5be2ca08d 100644
--- a/vendors/ocplib-resto/lib_ezresto-directory/test/ezDirectory.ml
+++ b/vendors/ocplib-resto/lib_ezresto-directory/test/ezDirectory.ml
@@ -26,7 +26,7 @@ let dir =
     (fun i j () () -> Lwt.return (`Ok (float_of_int i+.j)))
 let dir =
   register dir alternate_add_service'
-    (fun (i,j) () () -> Lwt.return (`Ok (i+j)))
+    (fun (((), i),j) () () -> Lwt.return (`Ok (i+ int_of_float j)))
 let dir =
   register_describe_directory_service
     dir describe_service
diff --git a/vendors/ocplib-resto/lib_ezresto-directory/test/ezResto_test.ml b/vendors/ocplib-resto/lib_ezresto-directory/test/ezResto_test.ml
index 5a9ce5092..a3c344566 100644
--- a/vendors/ocplib-resto/lib_ezresto-directory/test/ezResto_test.ml
+++ b/vendors/ocplib-resto/lib_ezresto-directory/test/ezResto_test.ml
@@ -48,7 +48,7 @@ module Test(Request : sig
     assert (test repeat_service ((), 3) (`A []) (`A (repeat 3 (`A [])))) ;
     assert (test add_service ((), 2) 3 5) ;
     assert (test alternate_add_service (((), 1), 2.5) () 3.5) ;
-    assert (test alternate_add_service' (1, 2) () 3) ;
+    assert (test alternate_add_service' (((), 1), 2.) () 3) ;
     ()
 end
 
diff --git a/vendors/ocplib-resto/lib_ezresto-directory/test/ezServices.ml b/vendors/ocplib-resto/lib_ezresto-directory/test/ezServices.ml
index 98bdd64a5..4b5b9bee9 100644
--- a/vendors/ocplib-resto/lib_ezresto-directory/test/ezServices.ml
+++ b/vendors/ocplib-resto/lib_ezresto-directory/test/ezServices.ml
@@ -41,10 +41,7 @@ let alternate_add_service' =
     ~input:Json_encoding.null
     ~output:Json_encoding.int
     ~error:Json_encoding.empty
-    Path.(map
-            (fun (((),i),f) -> (i,int_of_float f))
-            (fun (i,f) -> (((),i),float_of_int f))
-            (root / "bar" /: Arg.int /: Arg.float / "add"))
+    Path.(root / "bar" /: Arg.int /: Arg.float / "add")
 
 let minus_service r =
   post_service
diff --git a/vendors/ocplib-resto/lib_ezresto/ezResto.ml b/vendors/ocplib-resto/lib_ezresto/ezResto.ml
index e30a5091e..13eb6547a 100644
--- a/vendors/ocplib-resto/lib_ezresto/ezResto.ml
+++ b/vendors/ocplib-resto/lib_ezresto/ezResto.ml
@@ -23,7 +23,6 @@ module Path = struct
   let add_arg = Path.add_arg
   let (/) = add_suffix
   let (/:) = add_arg
-  let map = Path.map
 end
 module Query = Query
 type ('meth, 'params, 'query, 'input, 'output, 'error) service =
diff --git a/vendors/ocplib-resto/lib_ezresto/ezResto.mli b/vendors/ocplib-resto/lib_ezresto/ezResto.mli
index 2c06cb929..ca378b905 100644
--- a/vendors/ocplib-resto/lib_ezresto/ezResto.mli
+++ b/vendors/ocplib-resto/lib_ezresto/ezResto.mli
@@ -49,8 +49,6 @@ module Path : sig
   val add_arg: 'params path -> 'a Arg.arg -> ('params * 'a) path
   val (/:): 'params path -> 'a Arg.arg -> ('params * 'a) path
 
-  val map: ('a -> 'b) -> ('b -> 'a) -> 'a path -> 'b path
-
 end
 
 module Query : sig
diff --git a/vendors/ocplib-resto/lib_resto-directory/resto_directory.ml b/vendors/ocplib-resto/lib_resto-directory/resto_directory.ml
index f98fe5c22..0ed751556 100644
--- a/vendors/ocplib-resto/lib_resto-directory/resto_directory.ml
+++ b/vendors/ocplib-resto/lib_resto-directory/resto_directory.ml
@@ -181,7 +181,7 @@ module Make (Encoding : ENCODING) = struct
     : type p pr. (pr, p) Path.path -> p directory -> pr directory
     = fun path dir ->
       let rec prefix
-        : type k pr. (pr, k) Resto.Internal.rpath -> k directory -> pr directory
+        : type k pr. (pr, k) Resto.Internal.path -> k directory -> pr directory
         = fun path dir ->
           match path with
           | Root -> dir
@@ -195,9 +195,7 @@ module Make (Encoding : ENCODING) = struct
                                     services = MethMap.empty })
           | DynamicTail _ ->
               invalid_arg "RestoDirectory.prefix" in
-      match Resto.Internal.to_path path with
-      | Path path -> prefix path dir
-      | MappedPath (path, map, _) -> prefix path (map_directory map dir)
+      prefix (Resto.Internal.to_path path) dir
 
   let conflict steps kind = raise (Conflict (steps, kind))
 
@@ -431,7 +429,7 @@ module Make (Encoding : ENCODING) = struct
 
   let rec transparent_resolve
     : type pr p.
-      pr directory -> (pr, p) rpath -> p -> p directory option Lwt.t
+      pr directory -> (pr, p) path -> p -> p directory option Lwt.t
     = fun dir path rargs ->
       match path with
       | Root -> Lwt.return_some dir
@@ -488,16 +486,7 @@ module Make (Encoding : ENCODING) = struct
     params -> query -> input -> (output, error) Answer.t Lwt.t =
     fun dir service params query body ->
       let service = Service.Internal.to_service service in
-      begin
-        match service.path with
-        | Service.Internal.Path p ->
-            transparent_resolve dir p params
-        | Service.Internal.MappedPath (p, _, f) -> begin
-            transparent_resolve dir p (f params) >>= function
-            | None -> Lwt.return_none
-            | Some dir -> Lwt.return_some (map f dir)
-          end
-      end >>= function
+      transparent_resolve dir service.path params >>= function
       | None -> Lwt.return (`Not_found None)
       | Some (Static { services ; _ }) -> begin
           try
@@ -522,7 +511,7 @@ module Make (Encoding : ENCODING) = struct
 
   let rec describe_rpath
     : type a b. Description.path_item list ->
-      (a, b) rpath -> Description.path_item list
+      (a, b) path -> Description.path_item list
     = fun acc path ->
       match path with
       | Root -> acc
@@ -538,7 +527,7 @@ module Make (Encoding : ENCODING) = struct
    ****************************************************************************)
 
   let rec step_of_path
-    : type p rk. (rk, p) rpath -> step list -> step list
+    : type p rk. (rk, p) path -> step list -> step list
     = fun path acc ->
       match path with
       | Root -> acc
@@ -551,7 +540,7 @@ module Make (Encoding : ENCODING) = struct
 
   let rec insert
     : type k rk.
-      (rk, k) rpath -> rk directory -> k directory * (k directory -> rk directory)
+      (rk, k) path -> rk directory -> k directory * (k directory -> rk directory)
     = fun path dir ->
       match path with
       | Root -> dir, (fun x -> x)
@@ -629,7 +618,7 @@ module Make (Encoding : ENCODING) = struct
     fun root s handler ->
       let s = Service.Internal.to_service s in
       let register
-        : type k. (pr, k) rpath -> (k -> q -> i -> (o, e) Answer.t Lwt.t) ->
+        : type k. (pr, k) path -> (k -> q -> i -> (o, e) Answer.t Lwt.t) ->
           pr directory =
         fun path handler ->
           let dir, insert = insert path root in
@@ -662,9 +651,7 @@ module Make (Encoding : ENCODING) = struct
           | Static _ -> conflict path (CService s.meth)
           | Dynamic _ -> conflict path CBuilder
           | DynamicTail _ -> conflict path CTail in
-      match s.path with
-      | Path p -> register p handler
-      | MappedPath (p, map, _) -> register p (fun p i -> handler (map p) i)
+      register s.path handler
 
   let register =
     (register
@@ -681,7 +668,7 @@ module Make (Encoding : ENCODING) = struct
     fun ?descr root path builder ->
       let path = Resto.Internal.to_path path in
       let register
-        : type k. (pr, k) rpath -> (k -> k directory Lwt.t) -> pr directory =
+        : type k. (pr, k) path -> (k -> k directory Lwt.t) -> pr directory =
         fun path builder ->
           let dir, insert = insert path root in
           match dir with
@@ -692,11 +679,7 @@ module Make (Encoding : ENCODING) = struct
           | Static ({ subdirs = Some _ ; _ }) -> conflict path CDir
           | Dynamic _ -> conflict path CBuilder
           | DynamicTail _ -> conflict path CTail in
-      match path with
-      | Path p -> register p builder
-      | MappedPath (p, map, _) ->
-          register p
-            (fun args -> builder (map args) >|= map_directory map)
+      register path builder
 
   let register_describe_directory_service
     : type pr.
diff --git a/vendors/ocplib-resto/lib_resto-directory/test/directory.ml b/vendors/ocplib-resto/lib_resto-directory/test/directory.ml
index 675a5b2bb..107f60c54 100644
--- a/vendors/ocplib-resto/lib_resto-directory/test/directory.ml
+++ b/vendors/ocplib-resto/lib_resto-directory/test/directory.ml
@@ -28,7 +28,7 @@ let dir =
     (fun i j () () -> Lwt.return (`Ok (float_of_int i+.j)))
 let dir =
   register dir alternate_add_service'
-    (fun (i,j) () () -> Lwt.return (`Ok (i+j)))
+    (fun (((),i),j) () () -> Lwt.return (`Ok (i+ int_of_float j)))
 let dir =
   register dir dummy_service
     (fun ((((((((),_a), _b), _c), _d), _e), _f), _g) () () -> Lwt.return (`Ok ()))
diff --git a/vendors/ocplib-resto/lib_resto-directory/test/resto_test.ml b/vendors/ocplib-resto/lib_resto-directory/test/resto_test.ml
index f6a21e26e..fa095641e 100644
--- a/vendors/ocplib-resto/lib_resto-directory/test/resto_test.ml
+++ b/vendors/ocplib-resto/lib_resto-directory/test/resto_test.ml
@@ -69,7 +69,7 @@ module Test(Request : sig
     assert (test add_service ((), 2) 3 5) ;
     assert (test alternate_add_service (((), 1), 2.5) () 3.5) ;
     assert (test real_minus_service1 (((), 2.5), 1) () 1.5) ;
-    assert (test alternate_add_service' (1, 2) () 3) ;
+    assert (test alternate_add_service' (((), 1), 2.) () 3) ;
     ()
 
 end
diff --git a/vendors/ocplib-resto/lib_resto-directory/test/services.ml b/vendors/ocplib-resto/lib_resto-directory/test/services.ml
index 51a48b7b9..21c677b64 100644
--- a/vendors/ocplib-resto/lib_resto-directory/test/services.ml
+++ b/vendors/ocplib-resto/lib_resto-directory/test/services.ml
@@ -43,10 +43,7 @@ let alternate_add_service' =
     ~input:Json_encoding.null
     ~output:Json_encoding.int
     ~error:Json_encoding.empty
-    Path.(map
-            (fun (((),i),f) -> (i,int_of_float f))
-            (fun (i,f) -> (((),i),float_of_int f))
-            (root / "bar" /: Arg.int /: Arg.float / "add"))
+    Path.(root / "bar" /: Arg.int /: Arg.float / "add")
 
 let minus_service =
   post_service
diff --git a/vendors/ocplib-resto/lib_resto/resto.ml b/vendors/ocplib-resto/lib_resto/resto.ml
index 3d8998030..d020c613f 100644
--- a/vendors/ocplib-resto/lib_resto/resto.ml
+++ b/vendors/ocplib-resto/lib_resto/resto.ml
@@ -69,57 +69,35 @@ module Internal = struct
   let from_arg x = x
   let to_arg x = x
 
-  type (_,_) rpath =
-    | Root : ('rkey, 'rkey) rpath
-    | Static : ('rkey, 'key) rpath * string -> ('rkey, 'key) rpath
-    | Dynamic : ('rkey, 'key) rpath * 'a arg -> ('rkey, 'key * 'a) rpath
-    | DynamicTail : ('rkey, 'key) rpath * 'a arg -> ('rkey, 'key * 'a list) rpath
-
   type (_,_) path =
-    | Path: ('prefix, 'params) rpath -> ('prefix, 'params) path
-    | MappedPath:
-        ('prefix, 'key) rpath * ('key -> 'params) * ('params -> 'key) ->
-      ('prefix, 'params) path
+    | Root : ('rkey, 'rkey) path
+    | Static : ('rkey, 'key) path * string -> ('rkey, 'key) path
+    | Dynamic : ('rkey, 'key) path * 'a arg -> ('rkey, 'key * 'a) path
+    | DynamicTail : ('rkey, 'key) path * 'a arg -> ('rkey, 'key * 'a list) path
 
-  let rec rsubst0 : type a b. (a, a) rpath -> (b, b) rpath = function
+  let rec subst0 : type a b. (a, a) path -> (b, b) path = function
     | Root -> Root
-    | Static (rpath, name) -> Static (rsubst0 rpath, name)
-    | Dynamic (rpath, arg) -> assert false (* impossible *)
-    | DynamicTail (rpath, arg) -> assert false (* impossible *)
+    | Static (path, name) -> Static (subst0 path, name)
+    | Dynamic (path, arg) -> assert false (* impossible *)
+    | DynamicTail (path, arg) -> assert false (* impossible *)
 
-  let subst0 = function
-    | Path rpath -> Path (rsubst0 rpath)
-    | MappedPath _ -> invalid_arg "Resto.Path.subst0"
-
-  let rec rsubst1 : type a b c. (a, a * c) rpath -> (b, b * c) rpath = function
+  let rec subst1 : type a b c. (a, a * c) path -> (b, b * c) path = function
     | Root -> assert false (* impossible *)
-    | Static (rpath, name) -> Static (rsubst1 rpath, name)
-    | Dynamic (rpath, arg) -> Dynamic (rsubst0 rpath, arg)
-    | DynamicTail (rpath, arg) -> DynamicTail (rsubst0 rpath, arg)
+    | Static (path, name) -> Static (subst1 path, name)
+    | Dynamic (path, arg) -> Dynamic (subst0 path, arg)
+    | DynamicTail (path, arg) -> DynamicTail (subst0 path, arg)
 
-  let subst1 = function
-    | Path rpath -> Path (rsubst1 rpath)
-    | MappedPath _ -> invalid_arg "Resto.Path.subst1"
-
-  let rec rsubst2 : type a b c d. (a, (a * c) * d) rpath -> (b, (b * c) * d) rpath = function
+  let rec subst2 : type a b c d. (a, (a * c) * d) path -> (b, (b * c) * d) path = function
     | Root -> assert false (* impossible *)
-    | Static (rpath, name) -> Static (rsubst2 rpath, name)
-    | Dynamic (rpath, arg) -> Dynamic (rsubst1 rpath, arg)
-    | DynamicTail (rpath, arg) -> DynamicTail (rsubst1 rpath, arg)
+    | Static (path, name) -> Static (subst2 path, name)
+    | Dynamic (path, arg) -> Dynamic (subst1 path, arg)
+    | DynamicTail (path, arg) -> DynamicTail (subst1 path, arg)
 
-  let subst2 = function
-    | Path rpath -> Path (rsubst2 rpath)
-    | MappedPath _ -> invalid_arg "Resto.Path.subst2"
-
-  let rec rsubst3 : type a b c d e. (a, ((a * c) * d) * e) rpath -> (b, ((b * c) * d) * e) rpath = function
+  let rec subst3 : type a b c d e. (a, ((a * c) * d) * e) path -> (b, ((b * c) * d) * e) path = function
     | Root -> assert false (* impossible *)
-    | Static (rpath, name) -> Static (rsubst3 rpath, name)
-    | Dynamic (rpath, arg) -> Dynamic (rsubst2 rpath, arg)
-    | DynamicTail (rpath, arg) -> DynamicTail (rsubst2 rpath, arg)
-
-  let subst3 = function
-    | Path rpath -> Path (rsubst3 rpath)
-    | MappedPath _ -> invalid_arg "Resto.Path.subst3"
+    | Static (path, name) -> Static (subst3 path, name)
+    | Dynamic (path, arg) -> Dynamic (subst2 path, arg)
+    | DynamicTail (path, arg) -> DynamicTail (subst2 path, arg)
 
   let from_path x = x
   let to_path x = x
@@ -245,52 +223,33 @@ module Path = struct
 
   type ('a, 'b) t = ('a, 'b) Internal.path
   type ('a, 'b) path = ('a, 'b) Internal.path
-  type ('a, 'b) rpath = ('a, 'b) Internal.rpath
 
   type 'prefix context = ('prefix, 'prefix) path
 
-  let root = Path Root
-  let open_root = Path Root
+  let root = Root
+  let open_root = Root
 
   let add_suffix (type p pr) (path : (p, pr) path) name =
     match path with
-    | Path (DynamicTail _) -> invalid_arg "Resto.Path.add_suffix"
-    | MappedPath (DynamicTail _, _, _) -> invalid_arg "Resto.Path.add_suffix"
-    | Path path -> Path (Static (path, name))
-    | MappedPath (path, map, rmap) ->
-        MappedPath (Static (path, name), map, rmap)
+    | DynamicTail _ -> invalid_arg "Resto.Path.add_suffix"
+    | path -> Static (path, name)
 
   let add_arg (type p pr) (path : (p, pr) path)  arg =
     match path with
-    | Path (DynamicTail _) -> invalid_arg "Resto.Path.add_arg"
-    | MappedPath (DynamicTail _, _, _) -> invalid_arg "Resto.Path.add_arg"
-    | Path path -> Path (Dynamic (path, arg))
-    | MappedPath (path, map, rmap) ->
-        MappedPath (Dynamic (path, arg),
-                    (fun (x, y) -> (map x, y)),
-                    (fun (x, y) -> (rmap x, y)))
+    | DynamicTail _ -> invalid_arg "Resto.Path.add_arg"
+    | path -> Dynamic (path, arg)
 
   let add_final_args (type p pr) (path : (p, pr) path)  arg =
     match path with
-    | Path (DynamicTail _) -> invalid_arg "Resto.Path.add_final_arg"
-    | MappedPath (DynamicTail _, _, _) -> invalid_arg "Resto.Path.add_final_arg"
-    | Path path -> Path (DynamicTail (path, arg))
-    | MappedPath (path, map, rmap) ->
-        MappedPath (DynamicTail (path, arg),
-                    (fun (x, y) -> (map x, y)),
-                    (fun (x, y) -> (rmap x, y)))
-
-  let map map rmap = function
-    | Path p -> MappedPath (p, map, rmap)
-    | MappedPath (p, map', rmap') ->
-        MappedPath (p, (fun x -> map (map' x)), (fun x -> rmap' (rmap x)))
+    | DynamicTail _ -> invalid_arg "Resto.Path.add_final_arg"
+    | path -> DynamicTail (path, arg)
 
   let prefix
     : type p pr a. (pr, a) path -> (a, p) path -> (pr, p) path
     = fun p1 p2 ->
       let rec prefix
         : type pr a k.
-          (pr, a) path -> (a, k) rpath -> (pr, k) path
+          (pr, a) path -> (a, k) path -> (pr, k) path
         = fun p1 p2 ->
           match p2 with
           | Root -> p1
@@ -299,12 +258,8 @@ module Path = struct
           | DynamicTail (path, arg) -> add_final_args (prefix p1 path) arg
       in
       match p1 with
-      | Path (DynamicTail _) -> invalid_arg "Resto.Path.prefix"
-      | MappedPath (DynamicTail _, _, _) -> invalid_arg "Resto.Path.prefix"
-      | _ ->
-          match p2 with
-          | Path p2 -> prefix p1 p2
-          | MappedPath (p2, m, rm) -> map m rm (prefix p1 p2)
+      | DynamicTail _ -> invalid_arg "Resto.Path.prefix"
+      | _ -> prefix p1 p2
 
   let (/) = add_suffix
   let (/:) = add_arg
@@ -658,10 +613,6 @@ module MakeService(Encoding : ENCODING) = struct
   let subst2 s = { s with path = Internal.subst2 s.path }
   let subst3 s = { s with path = Internal.subst3 s.path }
 
-  let map f g (s : (_,_,_,_,_,_,_) service) =
-    { s with path = Path.map f g s.path }
-
-
   let meth = fun { meth } -> meth
 
   let query
@@ -711,7 +662,7 @@ module MakeService(Encoding : ENCODING) = struct
     : type pr p. (pr, p) path -> p -> string list
     = fun path args ->
       let rec forge_request_args
-        : type k. (pr, k) rpath -> k -> string list -> string list
+        : type k. (pr, k) path -> k -> string list -> string list
         = fun path args acc ->
           match path, args with
           | Root, _ ->
@@ -723,9 +674,7 @@ module MakeService(Encoding : ENCODING) = struct
           | DynamicTail (path, arg), (args, xs) ->
               forge_request_args path args
                 (List.fold_right (fun x acc -> arg.construct x :: acc) xs acc) in
-      match path with
-      | Path path -> forge_request_args path args []
-      | MappedPath (path, _, rmap) -> forge_request_args path (rmap args) []
+      forge_request_args path args []
 
   let forge_request_query
     : type q. q query -> q -> (string * string) list
diff --git a/vendors/ocplib-resto/lib_resto/resto.mli b/vendors/ocplib-resto/lib_resto/resto.mli
index 1218fa9ec..eda4b4ac0 100644
--- a/vendors/ocplib-resto/lib_resto/resto.mli
+++ b/vendors/ocplib-resto/lib_resto/resto.mli
@@ -75,9 +75,6 @@ module Path : sig
   val prefix:
     ('prefix, 'a) path -> ('a, 'params) path -> ('prefix, 'params) path
 
-  val map:
-    ('a -> 'b) -> ('b -> 'a) -> ('prefix, 'a) path -> ('prefix, 'b) path
-
 end
 
 (** Service directory description *)
@@ -192,17 +189,11 @@ module Internal : sig
   val from_arg : 'a arg -> 'a Arg.t
   val to_arg : 'a Arg.t -> 'a arg
 
-  type (_, _) rpath =
-    | Root : ('rkey, 'rkey) rpath
-    | Static : ('rkey, 'key) rpath * string -> ('rkey, 'key) rpath
-    | Dynamic : ('rkey, 'key) rpath * 'a arg -> ('rkey, 'key * 'a) rpath
-    | DynamicTail : ('rkey, 'key) rpath * 'a arg -> ('rkey, 'key * 'a list) rpath
-
   type (_, _) path =
-    | Path: ('prefix, 'params) rpath -> ('prefix, 'params) path
-    | MappedPath:
-        ('prefix, 'key) rpath * ('key -> 'params) * ('params -> 'key) ->
-      ('prefix, 'params) path
+    | Root : ('rkey, 'rkey) path
+    | Static : ('rkey, 'key) path * string -> ('rkey, 'key) path
+    | Dynamic : ('rkey, 'key) path * 'a arg -> ('rkey, 'key * 'a) path
+    | DynamicTail : ('rkey, 'key) path * 'a arg -> ('rkey, 'key * 'a list) path
 
   val from_path : ('a, 'b) path -> ('a, 'b) Path.t
   val to_path : ('a, 'b) Path.t -> ('a, 'b) path
@@ -338,12 +329,6 @@ module MakeService(Encoding : ENCODING) : sig
     ('meth, 'prefix, 'params,
      'query, 'input, 'output, 'error) service
 
-  val map:
-    ('a -> 'b) ->
-    ('b -> 'a) ->
-    ('meth, 'pr, 'a, 'q, 'i, 'o, 'e) service ->
-    ('meth, 'pr, 'b, 'q, 'i, 'o, 'e) service
-
   val subst0:
     ([< meth ] as 'm, 'p, 'p, 'q, 'i, 'o, 'e) service ->
     ('m, 'p2, 'p2, 'q, 'i, 'o, 'e) service