1 files changed, 44 insertions, 0 deletions
diff --git a/src/util/payto.c b/src/util/payto.c
index d0f3a994b..83a1a7e1d 100644
--- a/src/util/payto.c
+++ b/src/util/payto.c
@@ -312,4 +312,48 @@ TALER_payto_from_reserve (const char *exchange_base_url,
 }
 
 
+char *
+TALER_reserve_make_payto (const char *exchange_url,
+                          const struct TALER_ReservePublicKeyP *reserve_pub)
+{
+  char pub_str[sizeof (*reserve_pub) * 2];
+  char *end;
+  bool is_http;
+  char *reserve_url;
+
+  end = GNUNET_STRINGS_data_to_string (
+    reserve_pub,
+    sizeof (*reserve_pub),
+    pub_str,
+    sizeof (pub_str));
+  *end = '\0';
+  if (0 == strncmp (exchange_url,
+                    "http://",
+                    strlen ("http://")))
+  {
+    is_http = true;
+    exchange_url = &exchange_url[strlen ("http://")];
+  }
+  else if (0 == strncmp (exchange_url,
+                         "https://",
+                         strlen ("https://")))
+  {
+    is_http = false;
+    exchange_url = &exchange_url[strlen ("https://")];
+  }
+  else
+  {
+    GNUNET_break (0);
+    return NULL;
+  }
+  /* exchange_url includes trailing '/' */
+  GNUNET_asprintf (&reserve_url,
+                   "payto://%s/%s%s",
+                   is_http ? "taler+http" : "taler",
+                   exchange_url,
+                   pub_str);
+  return reserve_url;
+}
+
+
 /* end of payto.c */