From bf8c5982a2e79f0b5198a0033dd41e9702d093f9 Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Sun, 5 Apr 2020 22:05:38 +0200
Subject: make exchange API more uniform in how information is returned

---
 src/lib/exchange_api_wire.c | 67 +++++++++++++++++++++++----------------------
 1 file changed, 34 insertions(+), 33 deletions(-)

(limited to 'src/lib/exchange_api_wire.c')

diff --git a/src/lib/exchange_api_wire.c b/src/lib/exchange_api_wire.c
index 3f3998f5b..2602038b7 100644
--- a/src/lib/exchange_api_wire.c
+++ b/src/lib/exchange_api_wire.c
@@ -1,6 +1,6 @@
 /*
   This file is part of TALER
-  Copyright (C) 2014-2018 Taler Systems SA
+  Copyright (C) 2014-2020 Taler Systems SA
 
   TALER is free software; you can redistribute it and/or modify it under the
   terms of the GNU General Public License as published by the Free Software
@@ -208,15 +208,18 @@ handle_wire_finished (void *cls,
                       const void *response)
 {
   struct TALER_EXCHANGE_WireHandle *wh = cls;
-  enum TALER_ErrorCode ec;
   const json_t *j = response;
+  struct TALER_EXCHANGE_HttpResponse hr = {
+    .reply = j,
+    .http_status = (unsigned int) response_code
+  };
 
   TALER_LOG_DEBUG ("Checking raw /wire response\n");
   wh->job = NULL;
   switch (response_code)
   {
   case 0:
-    ec = TALER_EC_INVALID_RESPONSE;
+    hr.ec = TALER_EC_INVALID_RESPONSE;
     break;
   case MHD_HTTP_OK:
     {
@@ -238,8 +241,8 @@ handle_wire_finished (void *cls,
       {
         /* bogus reply */
         GNUNET_break_op (0);
-        response_code = 0;
-        ec = TALER_EC_SERVER_JSON_INVALID;
+        hr.http_status = 0;
+        hr.ec = TALER_EC_SERVER_JSON_INVALID;
         break;
       }
       if (0 == (num_accounts = json_array_size (accounts)))
@@ -247,8 +250,8 @@ handle_wire_finished (void *cls,
         /* bogus reply */
         GNUNET_break_op (0);
         GNUNET_JSON_parse_free (spec);
-        response_code = 0;
-        ec = TALER_EC_SERVER_JSON_INVALID;
+        hr.http_status = 0;
+        hr.ec = TALER_EC_SERVER_JSON_INVALID;
         break;
       }
       if (NULL == (fm = parse_fees (fees)))
@@ -256,12 +259,11 @@ handle_wire_finished (void *cls,
         /* bogus reply */
         GNUNET_break_op (0);
         GNUNET_JSON_parse_free (spec);
-        response_code = 0;
-        ec = TALER_EC_SERVER_JSON_INVALID;
+        hr.http_status = 0;
+        hr.ec = TALER_EC_SERVER_JSON_INVALID;
         break;
       }
 
-      ec = TALER_EC_NONE;
       key_state = TALER_EXCHANGE_get_keys (wh->exchange);
       /* parse accounts */
       {
@@ -286,8 +288,8 @@ handle_wire_finished (void *cls,
           {
             /* bogus reply */
             GNUNET_break_op (0);
-            response_code = 0;
-            ec = TALER_EC_SERVER_SIGNATURE_INVALID;
+            hr.http_status = 0;
+            hr.ec = TALER_EC_SERVER_SIGNATURE_INVALID;
             break;
           }
           if (GNUNET_OK !=
@@ -297,16 +299,16 @@ handle_wire_finished (void *cls,
           {
             /* bogus reply */
             GNUNET_break_op (0);
-            response_code = 0;
-            ec = TALER_EC_SERVER_JSON_INVALID;
+            hr.http_status = 0;
+            hr.ec = TALER_EC_SERVER_JSON_INVALID;
             break;
           }
           if (NULL == (method = TALER_payto_get_method (wa->payto_uri)))
           {
             /* bogus reply */
             GNUNET_break_op (0);
-            response_code = 0;
-            ec = TALER_EC_SERVER_JSON_INVALID;
+            hr.http_status = 0;
+            hr.ec = TALER_EC_SERVER_JSON_INVALID;
             break;
           }
           if (NULL == (wa->fees = lookup_fee (fm,
@@ -314,8 +316,8 @@ handle_wire_finished (void *cls,
           {
             /* bogus reply */
             GNUNET_break_op (0);
-            response_code = 0;
-            ec = TALER_EC_SERVER_JSON_INVALID;
+            hr.http_status = 0;
+            hr.ec = TALER_EC_SERVER_JSON_INVALID;
             GNUNET_free (method);
             break;
           }
@@ -325,11 +327,9 @@ handle_wire_finished (void *cls,
              (NULL != wh->cb) )
         {
           wh->cb (wh->cb_cls,
-                  response_code,
-                  ec,
+                  &hr,
                   num_accounts,
-                  was,
-                  j);
+                  was);
           wh->cb = NULL;
         }
       } /* end of 'parse accounts */
@@ -340,36 +340,37 @@ handle_wire_finished (void *cls,
   case MHD_HTTP_BAD_REQUEST:
     /* This should never happen, either us or the exchange is buggy
        (or API version conflict); just pass JSON reply to the application */
-    ec = TALER_JSON_get_error_code (j);
+    hr.ec = TALER_JSON_get_error_code (j);
+    hr.hint = TALER_JSON_get_error_hint (j);
     break;
   case MHD_HTTP_NOT_FOUND:
     /* Nothing really to verify, this should never
        happen, we should pass the JSON reply to the application */
-    ec = TALER_JSON_get_error_code (j);
+    hr.ec = TALER_JSON_get_error_code (j);
+    hr.hint = TALER_JSON_get_error_hint (j);
     break;
   case MHD_HTTP_INTERNAL_SERVER_ERROR:
     /* Server had an internal issue; we should retry, but this API
        leaves this to the application */
-    ec = TALER_JSON_get_error_code (j);
+    hr.ec = TALER_JSON_get_error_code (j);
+    hr.hint = TALER_JSON_get_error_hint (j);
     break;
   default:
     /* unexpected response code */
-    ec = TALER_JSON_get_error_code (j);
+    GNUNET_break_op (0);
+    hr.ec = TALER_JSON_get_error_code (j);
+    hr.hint = TALER_JSON_get_error_hint (j);
     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                 "Unexpected response code %u/%d\n",
                 (unsigned int) response_code,
-                (int) ec);
-    GNUNET_break (0);
-    response_code = 0;
+                (int) hr.ec);
     break;
   }
   if (NULL != wh->cb)
     wh->cb (wh->cb_cls,
-            response_code,
-            ec,
+            &hr,
             0,
-            NULL,
-            j);
+            NULL);
   TALER_EXCHANGE_wire_cancel (wh);
 }
 
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