convert amount from string in /proposal

1 files changed, 31 insertions, 0 deletions

diff --git a/src/backend/taler-merchant-httpd_proposal.c b/src/backend/taler-merchant-httpd_proposal.c
index 31e3fb39..dcbe3d96 100644
--- a/src/backend/taler-merchant-httpd_proposal.c
+++ b/src/backend/taler-merchant-httpd_proposal.c
@@ -122,6 +122,31 @@ json_parse_cleanup (struct TM_HandlerContext *hc)
 
 
 /**
+ * Convert an amount in a JSON object from the string amount format to the JSON
+ * amount format.  Does nothing if the field is missing or already a JSON
+ * object.
+ *
+ * @param json json with the amount to convert
+ * @param field_name name of the field to convert
+ * @returns #GNUNET_OK on success, #GNUNET_SYSERR on invalid format
+ */
+static int
+convert_amount (json_t *json, char *field_name)
+{
+  if (! json_is_string (json_object_get (json, field_name)))
+    return GNUNET_OK;
+  const char *amount_str = json_string_value (json_object_get (json, field_name));
+  GNUNET_assert (NULL != amount_str);
+  struct TALER_Amount amount;
+  if (GNUNET_OK != TALER_string_to_amount (amount_str, &amount))
+    return GNUNET_SYSERR;
+  json_object_del (json, field_name);
+  json_object_set_new (json, field_name, TALER_JSON_from_amount (&amount));
+  return GNUNET_OK;
+}
+
+
+/**
  * Transform an order into a proposal and store it in the database.
  * Write the resulting proposal or an error message ot a MHD connection
  *
@@ -190,6 +215,12 @@ proposal_put (struct MHD_Connection *connection,
                          json_string (buf));
   }
 
+  if (GNUNET_OK != convert_amount (order, "amount"))
+    return TMH_RESPONSE_reply_arg_invalid (connection,
+                                           TALER_EC_PARAMETER_MALFORMED,
+                                           "amount");
+
+  /* Add timestamp if it doesn't exist */
   if (NULL == json_object_get (order,
                                "timestamp"))
   {