finish implementing #6935

1 files changed, 7 insertions, 12 deletions

diff --git a/src/lib/merchant_api_lock_product.c b/src/lib/merchant_api_lock_product.c
index e9593fdb..a3c345d5 100644
--- a/src/lib/merchant_api_lock_product.c
+++ b/src/lib/merchant_api_lock_product.c
@@ -168,18 +168,13 @@ TALER_MERCHANT_product_lock (
   struct TALER_MERCHANT_ProductLockHandle *plh;
   json_t *req_obj;
 
-  req_obj = json_pack ("{s:o, s:o, s:I}",
-                       "lock_uuid",
-                       GNUNET_JSON_from_data_auto (uuid),
-                       "duration",
-                       GNUNET_JSON_from_time_rel (duration),
-                       "quantity",
-                       (json_int_t) quantity);
-  if (NULL == req_obj)
-  {
-    GNUNET_break (0);
-    return NULL;
-  }
+  req_obj = GNUNET_JSON_PACK (
+    GNUNET_JSON_pack_data_auto ("lock_uuid",
+                                uuid),
+    GNUNET_JSON_pack_time_rel ("duration",
+                               duration),
+    GNUNET_JSON_pack_uint64 ("quantity",
+                             quantity));
   plh = GNUNET_new (struct TALER_MERCHANT_ProductLockHandle);
   plh->ctx = ctx;
   plh->cb = cb;