diff --git a/src/api.ml b/src/api.ml
index b92ff019..074149bc 100644
--- a/src/api.ml
+++ b/src/api.ml
@@ -922,6 +922,19 @@ module SignKey = struct
     master_sig: ExchangeSigningKeyValidity.t;
   }
 
+  (* TODO rm one of them *)
+  let of_signkey
+      Signkey.
+        {
+          pub;
+          stamp_start;
+          stamp_expire;
+          stamp_end;
+          master_sig;
+          revoked_sig= _;
+        } =
+    { key= pub; stamp_start; stamp_expire; stamp_end; master_sig }
+
   let jsont =
     let make key stamp_start stamp_expire stamp_end master_sig =
       { key; stamp_start; stamp_expire; stamp_end; master_sig }
diff --git a/src/http_information.ml b/src/http_information.ml
index bbc53b20..17186d5a 100644
--- a/src/http_information.ml
+++ b/src/http_information.ml
@@ -41,7 +41,6 @@ let denomgroup_of_denomdata
         master_sig;
         revoked_sig= _;
       } =
-  let master_sig = match master_sig with None -> assert false | Some v -> v in
   let denoms =
     [
       RsaDenom.
@@ -112,92 +111,66 @@ let mk_keys ~db_conn (module Sm : Secmod.S) ~last_issue_date =
   let wallet_balance_limit_without_kyc = None in
   let hard_limits = [] in
   let zero_limits = [] in
-  let denom_data_l =
-    (* TODO sm-db *)
+  let dn_l =
     (*Pg.get_denominations db_conn |> unwrap_err_caqti *)
-    Sm.get_denoms_data ()
-  in
-  let denom_data_l =
+    Sm.get_denominations ()
+    |>
     (* reverse chronological order *)
-    List.sort
-      (fun a b -> Stdlib.compare b.Denomination.stamp_start a.stamp_start)
-      denom_data_l
+    List.sort (fun a b ->
+        Stdlib.compare b.Denomination.stamp_start a.stamp_start)
   in
   let list_issue_date =
-    match denom_data_l with
-    | [] -> Time.Timestamp.never
-    | v :: _ -> v.Denomination.stamp_start
+    match dn_l with
+    | [] -> Timestamp.never
+    | dn :: _ -> dn.Denomination.stamp_start
   in
   let denominations =
-    let open Denomination in
     (* if `?last_issue_date` query param does not exactly match the `stamp_start`
        of one of the denomination keys, all keys are returned *)
+    let open Denomination in
     let l =
       match last_issue_date with
-      | None -> denom_data_l
+      | None -> dn_l
       | Some last_issue_date -> (
           match
             List.find_opt
-              (fun v ->
-                Time.Timestamp.compare v.stamp_start last_issue_date = 0)
-              denom_data_l
+              (fun v -> Timestamp.compare v.stamp_start last_issue_date = 0)
+              dn_l
           with
-          | None -> denom_data_l
+          | None -> dn_l
           | Some _ ->
               List.filter
                 (fun v ->
                   Time.Timestamp.compare v.stamp_start last_issue_date >= 0)
-                denom_data_l)
+                dn_l)
     in
     List.map denomgroup_of_denomdata l
   in
 
   let signkeys =
-    (* TODO sm-db
-       use database signkey data / verify secmod and database are in sync *)
     (*
     let now = Ptime_clock.now () |> Option.some in
     let+ signkey_data_l = Pg.get_active_signkeys db_conn ~now |> unwrap_err_caqti in*)
-    let signkey_data_l = Sm.get_signkeys_data () in
-    let signkey_data_l =
-      List.sort
-        (fun a b ->
-          let open Signkey in
-          Stdlib.compare b.stamp_start a.stamp_start)
-        signkey_data_l
-    in
-    List.filter_map
-      (fun Signkey.
-             {
-               pub;
-               stamp_start;
-               stamp_expire;
-               stamp_end;
-               master_sig;
-               revoked_sig= _;
-             } ->
-        match master_sig with
-        | None -> None
-        | Some master_sig ->
-            Some
-              SignKey.
-                { key= pub; stamp_start; stamp_expire; stamp_end; master_sig })
-      signkey_data_l
+    Sm.get_signkeys ()
+    |> List.sort (fun a b ->
+        let open Signkey in
+        Stdlib.compare b.stamp_start a.stamp_start)
+    |> List.map Api.SignKey.of_signkey
   in
 
   let exchange_pub =
     (* the eddsa pub key used to sign exchange_sig *)
     match signkeys with
     | [] -> Fmt.failwith "exchange has no active signkey"
-    | v :: _ -> v.SignKey.key
+    | sk :: _ -> sk.SignKey.key
   in
   let exchange_sig =
     (* Compact EdDSA signature (binary-only) over the
        contatentation of all of the master_sigs (in reverse
        chronological order by group) in the arrays under "denominations". *)
     let hc =
-      denom_data_l
-      |> List.filter_map (fun v -> v.Denomination.master_sig)
+      dn_l
+      |> List.map (fun dn -> dn.Denomination.master_sig)
       |> List.map Signatures.DenominationKeyValidity.to_octets
       |> String.concat ""
       |> Hash.H64.hash
diff --git a/src/signkey.ml b/src/signkey.ml
index 611b894c..a710aee6 100644
--- a/src/signkey.ml
+++ b/src/signkey.ml
@@ -1,5 +1,6 @@
 open Crypto
 
+(* TODO replace by Api.SignKey.t instead? (no revoked_sig) *)
 type t = {
   pub: eddsa_pub;
   stamp_start: Timestamp.t;