fix #6065

8 files changed, 34 insertions, 47 deletions

diff --git a/src/exchange/taler-exchange-httpd_mhd.c b/src/exchange/taler-exchange-httpd_mhd.c
index 53944b6a7..0f2ce033a 100644
--- a/src/exchange/taler-exchange-httpd_mhd.c
+++ b/src/exchange/taler-exchange-httpd_mhd.c
@@ -128,11 +128,10 @@ TEH_MHD_handler_send_json_pack_error (struct TEH_RequestHandler *rh,
   (void) connection_cls;
   (void) upload_data;
   (void) upload_data_size;
-  return TALER_MHD_reply_json_pack (connection,
-                                    rh->response_code,
-                                    "{s:s}",
-                                    "error",
-                                    rh->data);
+  return TALER_MHD_reply_with_error (connection,
+                                     rh->response_code,
+                                     TALER_EC_METHOD_INVALID,
+                                     rh->data);
 }
 
 
diff --git a/src/exchange/taler-exchange-httpd_refresh_melt.c b/src/exchange/taler-exchange-httpd_refresh_melt.c
index 71200037d..c7dc700f7 100644
--- a/src/exchange/taler-exchange-httpd_refresh_melt.c
+++ b/src/exchange/taler-exchange-httpd_refresh_melt.c
@@ -69,7 +69,7 @@ reply_refresh_melt_insufficient_funds (struct MHD_Connection *connection,
   return TALER_MHD_reply_json_pack (connection,
                                     MHD_HTTP_CONFLICT,
                                     "{s:s, s:I, s:o, s:o, s:o, s:o, s:o}",
-                                    "error",
+                                    "hint",
                                     "insufficient funds",
                                     "code",
                                     (json_int_t)
diff --git a/src/exchange/taler-exchange-httpd_refresh_reveal.c b/src/exchange/taler-exchange-httpd_refresh_reveal.c
index 3619f9a39..1e03c8e7d 100644
--- a/src/exchange/taler-exchange-httpd_refresh_reveal.c
+++ b/src/exchange/taler-exchange-httpd_refresh_reveal.c
@@ -108,7 +108,7 @@ reply_refresh_reveal_mismatch (struct MHD_Connection *connection,
   return TALER_MHD_reply_json_pack (connection,
                                     MHD_HTTP_CONFLICT,
                                     "{s:s, s:I, s:o}",
-                                    "error", "commitment violation",
+                                    "hint", "commitment violation",
                                     "code",
                                     (json_int_t)
                                     TALER_EC_REFRESH_REVEAL_COMMITMENT_VIOLATION,
diff --git a/src/exchange/taler-exchange-httpd_refund.c b/src/exchange/taler-exchange-httpd_refund.c
index 8c6e90302..8e24b9b47 100644
--- a/src/exchange/taler-exchange-httpd_refund.c
+++ b/src/exchange/taler-exchange-httpd_refund.c
@@ -83,28 +83,6 @@ reply_refund_success (struct MHD_Connection *connection,
 
 
 /**
- * Generate generic refund failure message. All the details
- * are in the @a response_code.  The body can be empty.
- *
- * @param connection connection to the client
- * @param response_code response code to generate
- * @param ec taler error code to include
- * @return MHD result code
- */
-static int
-reply_refund_failure (struct MHD_Connection *connection,
-                      unsigned int response_code,
-                      enum TALER_ErrorCode ec)
-{
-  return TALER_MHD_reply_json_pack (connection,
-                                    response_code,
-                                    "{s:s, s:I}",
-                                    "hint", "refund failure",
-                                    "code", (json_int_t) ec);
-}
-
-
-/**
  * Generate refund conflict failure message. Returns the
  * transaction list @a tl with the details about the conflict.
  *
@@ -194,9 +172,10 @@ refund_transaction (void *cls,
   if (0 > qs)
   {
     if (GNUNET_DB_STATUS_HARD_ERROR == qs)
-      *mhd_ret = reply_refund_failure (connection,
-                                       MHD_HTTP_NOT_FOUND,
-                                       TALER_EC_REFUND_COIN_NOT_FOUND);
+      *mhd_ret = TALER_MHD_reply_with_error (connection,
+                                             MHD_HTTP_NOT_FOUND,
+                                             TALER_EC_REFUND_COIN_NOT_FOUND,
+                                             "database transaction failure");
     return qs;
   }
   deposit_found = GNUNET_NO;
@@ -319,9 +298,10 @@ refund_transaction (void *cls,
     GNUNET_break_op (0); /* currency mismatch */
     TEH_plugin->free_coin_transaction_list (TEH_plugin->cls,
                                             tl);
-    *mhd_ret = reply_refund_failure (connection,
-                                     MHD_HTTP_PRECONDITION_FAILED,
-                                     TALER_EC_REFUND_CURRENCY_MISSMATCH);
+    *mhd_ret = TALER_MHD_reply_with_error (connection,
+                                           MHD_HTTP_PRECONDITION_FAILED,
+                                           TALER_EC_REFUND_CURRENCY_MISSMATCH,
+                                           "currencies involved do not match");
     return GNUNET_DB_STATUS_HARD_ERROR;
   }
 
@@ -353,9 +333,10 @@ refund_transaction (void *cls,
     /* money was already transferred to merchant, can no longer refund */
     TEH_plugin->free_coin_transaction_list (TEH_plugin->cls,
                                             tl);
-    *mhd_ret = reply_refund_failure (connection,
-                                     MHD_HTTP_GONE,
-                                     TALER_EC_REFUND_MERCHANT_ALREADY_PAID);
+    *mhd_ret = TALER_MHD_reply_with_error (connection,
+                                           MHD_HTTP_GONE,
+                                           TALER_EC_REFUND_MERCHANT_ALREADY_PAID,
+                                           "money already sent to merchant");
     return GNUNET_DB_STATUS_HARD_ERROR;
   }
 
@@ -366,9 +347,10 @@ refund_transaction (void *cls,
     GNUNET_break_op (0); /* cannot refund more than original value */
     TEH_plugin->free_coin_transaction_list (TEH_plugin->cls,
                                             tl);
-    *mhd_ret = reply_refund_failure (connection,
-                                     MHD_HTTP_PRECONDITION_FAILED,
-                                     TALER_EC_REFUND_INSUFFICIENT_FUNDS);
+    *mhd_ret = TALER_MHD_reply_with_error (connection,
+                                           MHD_HTTP_PRECONDITION_FAILED,
+                                           TALER_EC_REFUND_INSUFFICIENT_FUNDS,
+                                           "refund requested exceeds original value");
     return GNUNET_DB_STATUS_HARD_ERROR;
   }
   /* Check refund fee matches fee of denomination key! */
@@ -481,9 +463,10 @@ verify_and_execute_refund (struct MHD_Connection *connection,
     if (0 > qs)
     {
       GNUNET_break (GNUNET_DB_STATUS_HARD_ERROR == qs);
-      return reply_refund_failure (connection,
-                                   MHD_HTTP_NOT_FOUND,
-                                   TALER_EC_REFUND_COIN_NOT_FOUND);
+      return TALER_MHD_reply_with_error (connection,
+                                         MHD_HTTP_NOT_FOUND,
+                                         TALER_EC_REFUND_COIN_NOT_FOUND,
+                                         "denomination of coin to be refunded not found in DB");
     }
   }
 
diff --git a/src/exchange/taler-exchange-httpd_reserve_status.c b/src/exchange/taler-exchange-httpd_reserve_status.c
index 89bf8b38a..e2d35aaec 100644
--- a/src/exchange/taler-exchange-httpd_reserve_status.c
+++ b/src/exchange/taler-exchange-httpd_reserve_status.c
@@ -164,7 +164,7 @@ TEH_RESERVE_handler_reserve_status (struct TEH_RequestHandler *rh,
     return TALER_MHD_reply_json_pack (connection,
                                       MHD_HTTP_NOT_FOUND,
                                       "{s:s, s:s, s:I}",
-                                      "error", "Reserve not found",
+                                      "hint", "Reserve not found",
                                       "parameter", "reserve_pub",
                                       "code",
                                       (json_int_t)
diff --git a/src/exchange/taler-exchange-httpd_reserve_withdraw.c b/src/exchange/taler-exchange-httpd_reserve_withdraw.c
index 86633cd98..9daad0a02 100644
--- a/src/exchange/taler-exchange-httpd_reserve_withdraw.c
+++ b/src/exchange/taler-exchange-httpd_reserve_withdraw.c
@@ -74,7 +74,7 @@ reply_reserve_withdraw_insufficient_funds (struct MHD_Connection *connection,
   return TALER_MHD_reply_json_pack (connection,
                                     MHD_HTTP_CONFLICT,
                                     "{s:s, s:I, s:o, s:o}",
-                                    "error", "Insufficient funds",
+                                    "hint", "insufficient funds",
                                     "code",
                                     (json_int_t)
                                     TALER_EC_WITHDRAW_INSUFFICIENT_FUNDS,
diff --git a/src/exchange/taler-exchange-httpd_responses.c b/src/exchange/taler-exchange-httpd_responses.c
index c88a8a254..90ca14c88 100644
--- a/src/exchange/taler-exchange-httpd_responses.c
+++ b/src/exchange/taler-exchange-httpd_responses.c
@@ -446,7 +446,7 @@ TEH_RESPONSE_reply_coin_insufficient_funds (struct MHD_Connection *connection,
   return TALER_MHD_reply_json_pack (connection,
                                     MHD_HTTP_CONFLICT,
                                     "{s:s, s:I, s:o}",
-                                    "error", "insufficient funds",
+                                    "hint", "insufficient funds",
                                     "code", (json_int_t) ec,
                                     "history", history);
 }
diff --git a/src/include/taler_error_codes.h b/src/include/taler_error_codes.h
index ac7f92888..917ac36db 100644
--- a/src/include/taler_error_codes.h
+++ b/src/include/taler_error_codes.h
@@ -81,6 +81,11 @@ enum TALER_ErrorCode
   TALER_EC_JSON_ALLOCATION_FAILURE = 7,
 
   /**
+   * HTTP method invalid for this URL.
+   */
+  TALER_EC_METHOD_INVALID = 8,
+
+  /**
    * The exchange failed to even just initialize its connection to the
    * database.  This response is provided with HTTP status code
    * MHD_HTTP_INTERNAL_SERVER_ERROR.