From 34619cecdbd04135b3b11c52616d0add4c7945dc Mon Sep 17 00:00:00 2001
From: swrup <swrup@protonmail.com>
Date: Fri, 28 Nov 2025 17:43:27 +0100
Subject: [PATCH]

---
 tools/offline_signature.ml | 29 ++++++++++++++++++++++++++---
 1 file changed, 26 insertions(+), 3 deletions(-)

diff --git a/tools/offline_signature.ml b/tools/offline_signature.ml
index 4d88aff9..219d96da 100644
--- a/tools/offline_signature.ml
+++ b/tools/offline_signature.ml
@@ -1,4 +1,27 @@
-let _denom_signature ~key ~key_pub
+let _signkey_signature ~master_key ~master_key_pub:_
+    Api.FutureSignKey.
+      {
+        key;
+        stamp_start;
+        stamp_expire;
+        stamp_end;
+        (* TODO check sigs *)
+        signkey_secmod_sig= _;
+      } =
+  let master_sig =
+    let open Bin_signature.ExchangeSigningKeyValidityPS in
+    {
+      start= stamp_start;
+      expire= stamp_expire;
+      end_= stamp_end;
+      signkey_pub= key;
+    }
+    |> Bin.to_string bin
+    |> Crypto.EddsaSignature.sign ~key:master_key
+  in
+  Api.SignKeySignature.{ key; master_sig }
+
+let _denom_signature ~master_key ~master_key_pub
     Api.FutureDenom.
       {
         section_name= _;
@@ -29,7 +52,7 @@ let _denom_signature ~key ~key_pub
     let open Bin_type in
     let open Bin_signature.DenominationKeyValidityPS in
     {
-      master= key_pub;
+      master= master_key_pub;
       start= stamp_start;
       expire_withdraw= stamp_expire_withdraw;
       expire_spend= stamp_expire_deposit;
@@ -41,7 +64,7 @@ let _denom_signature ~key ~key_pub
       denom_hash= DenominationHash.hash pub_octets;
     }
     |> Bin.to_string bin
-    |> Crypto.EddsaSignature.sign ~key
+    |> Crypto.EddsaSignature.sign ~key:master_key
   in
   Api.DenomSignature.{ h_denom_pub; master_sig }