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[taler-exchange] branch master updated: make code compiler without warni


From: gnunet
Subject: [taler-exchange] branch master updated: make code compiler without warnings with latest libmicrohttpd API
Date: Thu, 09 Apr 2020 00:59:57 +0200

This is an automated email from the git hooks/post-receive script.

grothoff pushed a commit to branch master
in repository exchange.

The following commit(s) were added to refs/heads/master by this push:
     new 543fe4ae make code compiler without warnings with latest libmicrohttpd 
API
543fe4ae is described below

commit 543fe4ae36649cf64eabb1b1447539bfb0c3c7c2
Author: Christian Grothoff <address@hidden>
AuthorDate: Thu Apr 9 00:59:55 2020 +0200

    make code compiler without warnings with latest libmicrohttpd API
---
 src/auditor/taler-auditor-httpd.c                  |  4 +--
 src/auditor/taler-auditor-httpd.h                  | 12 +++----
 .../taler-auditor-httpd_deposit-confirmation.c     |  8 ++---
 .../taler-auditor-httpd_deposit-confirmation.h     |  2 +-
 src/auditor/taler-auditor-httpd_exchanges.c        |  2 +-
 src/auditor/taler-auditor-httpd_exchanges.h        |  2 +-
 src/auditor/taler-auditor-httpd_mhd.c              |  4 +--
 src/auditor/taler-auditor-httpd_mhd.h              |  4 +--
 src/bank-lib/fakebank.c                            | 19 +++++-----
 src/exchange/taler-exchange-httpd.c                | 22 ++++++------
 src/exchange/taler-exchange-httpd.h                | 15 ++++----
 src/exchange/taler-exchange-httpd_db.c             |  6 ++--
 src/exchange/taler-exchange-httpd_db.h             |  9 ++---
 src/exchange/taler-exchange-httpd_deposit.c        | 12 +++----
 src/exchange/taler-exchange-httpd_deposit.h        |  2 +-
 src/exchange/taler-exchange-httpd_deposits_get.c   | 12 +++----
 src/exchange/taler-exchange-httpd_deposits_get.h   |  2 +-
 src/exchange/taler-exchange-httpd_keystate.c       |  8 ++---
 src/exchange/taler-exchange-httpd_keystate.h       |  2 +-
 src/exchange/taler-exchange-httpd_link.c           |  6 ++--
 src/exchange/taler-exchange-httpd_link.h           |  2 +-
 src/exchange/taler-exchange-httpd_melt.c           | 27 +++++++-------
 src/exchange/taler-exchange-httpd_melt.h           |  2 +-
 src/exchange/taler-exchange-httpd_mhd.c            |  4 +--
 src/exchange/taler-exchange-httpd_mhd.h            |  4 +--
 src/exchange/taler-exchange-httpd_recoup.c         | 38 +++++++++++---------
 src/exchange/taler-exchange-httpd_recoup.h         |  2 +-
 .../taler-exchange-httpd_refreshes_reveal.c        | 41 +++++++++++-----------
 .../taler-exchange-httpd_refreshes_reveal.h        |  2 +-
 src/exchange/taler-exchange-httpd_refund.c         | 14 ++++----
 src/exchange/taler-exchange-httpd_refund.h         |  4 +--
 src/exchange/taler-exchange-httpd_reserves_get.c   |  8 ++---
 src/exchange/taler-exchange-httpd_reserves_get.h   |  2 +-
 src/exchange/taler-exchange-httpd_responses.c      |  2 +-
 src/exchange/taler-exchange-httpd_responses.h      |  3 +-
 src/exchange/taler-exchange-httpd_terms.c          |  4 +--
 src/exchange/taler-exchange-httpd_terms.h          |  4 +--
 src/exchange/taler-exchange-httpd_transfers_get.c  |  8 ++---
 src/exchange/taler-exchange-httpd_transfers_get.h  |  2 +-
 src/exchange/taler-exchange-httpd_wire.c           |  2 +-
 src/exchange/taler-exchange-httpd_wire.h           |  2 +-
 src/exchange/taler-exchange-httpd_withdraw.c       | 12 +++----
 src/exchange/taler-exchange-httpd_withdraw.h       |  2 +-
 src/include/taler_mhd_lib.h                        | 32 +++++++++--------
 src/mhd/mhd_config.c                               |  2 +-
 src/mhd/mhd_legal.c                                |  6 ++--
 src/mhd/mhd_responses.c                            | 34 +++++++++---------
 47 files changed, 215 insertions(+), 203 deletions(-)

diff --git a/src/auditor/taler-auditor-httpd.c 
b/src/auditor/taler-auditor-httpd.c
index 4f7e11f8..627950ae 100644
--- a/src/auditor/taler-auditor-httpd.c
+++ b/src/auditor/taler-auditor-httpd.c
@@ -302,7 +302,7 @@ handle_mhd_completion_callback (void *cls,
  * @param[in,out] upload_data_size number of bytes (left) in @a upload_data
  * @return MHD result code
   */
-static int
+static MHD_RESULT
 handle_version (struct TAH_RequestHandler *rh,
                 struct MHD_Connection *connection,
                 void **connection_cls,
@@ -347,7 +347,7 @@ handle_version (struct TAH_RequestHandler *rh,
  * @param con_cls closure for request (a `struct Buffer *`)
  * @return MHD result code
  */
-static int
+static MHD_RESULT
 handle_mhd_request (void *cls,
                     struct MHD_Connection *connection,
                     const char *url,
diff --git a/src/auditor/taler-auditor-httpd.h 
b/src/auditor/taler-auditor-httpd.h
index 3e7e79a1..127c4dd8 100644
--- a/src/auditor/taler-auditor-httpd.h
+++ b/src/auditor/taler-auditor-httpd.h
@@ -75,16 +75,16 @@ struct TAH_RequestHandler
    * @param[in,out] upload_data_size number of bytes (left) in @a upload_data
    * @return MHD result code
    */
-  int (*handler)(struct TAH_RequestHandler *rh,
-                 struct MHD_Connection *connection,
-                 void **connection_cls,
-                 const char *upload_data,
-                 size_t *upload_data_size);
+  MHD_RESULT (*handler)(struct TAH_RequestHandler *rh,
+                        struct MHD_Connection *connection,
+                        void **connection_cls,
+                        const char *upload_data,
+                        size_t *upload_data_size);
 
   /**
    * Default response code.
    */
-  int response_code;
+  unsigned int response_code;
 };
 
 
diff --git a/src/auditor/taler-auditor-httpd_deposit-confirmation.c 
b/src/auditor/taler-auditor-httpd_deposit-confirmation.c
index fd48ff93..5f84a725 100644
--- a/src/auditor/taler-auditor-httpd_deposit-confirmation.c
+++ b/src/auditor/taler-auditor-httpd_deposit-confirmation.c
@@ -56,7 +56,7 @@ static pthread_mutex_t lock;
  * @param es information about the exchange's signing key
  * @return MHD result code
  */
-static int
+static MHD_RESULT
 verify_and_execute_deposit_confirmation (
   struct MHD_Connection *connection,
   const struct TALER_AUDITORDB_DepositConfirmation *dc,
@@ -212,7 +212,7 @@ verify_and_execute_deposit_confirmation (
  * @param[in,out] upload_data_size number of bytes (left) in @a upload_data
  * @return MHD result code
   */
-int
+MHD_RESULT
 TAH_DEPOSIT_CONFIRMATION_handler (struct TAH_RequestHandler *rh,
                                   struct MHD_Connection *connection,
                                   void **connection_cls,
@@ -245,7 +245,7 @@ TAH_DEPOSIT_CONFIRMATION_handler (struct TAH_RequestHandler 
*rh,
   (void) upload_data_size;
   {
     json_t *json;
-    int res;
+    enum GNUNET_GenericReturnValue res;
 
     res = TALER_MHD_parse_post_json (connection,
                                      connection_cls,
@@ -270,7 +270,7 @@ TAH_DEPOSIT_CONFIRMATION_handler (struct TAH_RequestHandler 
*rh,
   es.exchange_pub = dc.exchange_pub; /* used twice! */
   dc.master_public_key = es.master_public_key;
   {
-    int res;
+    MHD_RESULT res;
 
     res = verify_and_execute_deposit_confirmation (connection,
                                                    &dc,
diff --git a/src/auditor/taler-auditor-httpd_deposit-confirmation.h 
b/src/auditor/taler-auditor-httpd_deposit-confirmation.h
index 531f3c93..a7c33191 100644
--- a/src/auditor/taler-auditor-httpd_deposit-confirmation.h
+++ b/src/auditor/taler-auditor-httpd_deposit-confirmation.h
@@ -49,7 +49,7 @@ TEAH_DEPOSIT_CONFIRMATION_done (void);
  * @param[in,out] upload_data_size number of bytes (left) in @a upload_data
  * @return MHD result code
   */
-int
+MHD_RESULT
 TAH_DEPOSIT_CONFIRMATION_handler (struct TAH_RequestHandler *rh,
                                   struct MHD_Connection *connection,
                                   void **connection_cls,
diff --git a/src/auditor/taler-auditor-httpd_exchanges.c 
b/src/auditor/taler-auditor-httpd_exchanges.c
index 237b973f..f117b608 100644
--- a/src/auditor/taler-auditor-httpd_exchanges.c
+++ b/src/auditor/taler-auditor-httpd_exchanges.c
@@ -68,7 +68,7 @@ add_exchange (void *cls,
  * @param[in,out] upload_data_size number of bytes (left) in @a upload_data
  * @return MHD result code
   */
-int
+MHD_RESULT
 TAH_EXCHANGES_handler (struct TAH_RequestHandler *rh,
                        struct MHD_Connection *connection,
                        void **connection_cls,
diff --git a/src/auditor/taler-auditor-httpd_exchanges.h 
b/src/auditor/taler-auditor-httpd_exchanges.h
index c356d7e9..c7d8dd5f 100644
--- a/src/auditor/taler-auditor-httpd_exchanges.h
+++ b/src/auditor/taler-auditor-httpd_exchanges.h
@@ -36,7 +36,7 @@
  * @param[in,out] upload_data_size number of bytes (left) in @a upload_data
  * @return MHD result code
   */
-int
+MHD_RESULT
 TAH_EXCHANGES_handler (struct TAH_RequestHandler *rh,
                        struct MHD_Connection *connection,
                        void **connection_cls,
diff --git a/src/auditor/taler-auditor-httpd_mhd.c 
b/src/auditor/taler-auditor-httpd_mhd.c
index a8322a83..e5d2f71e 100644
--- a/src/auditor/taler-auditor-httpd_mhd.c
+++ b/src/auditor/taler-auditor-httpd_mhd.c
@@ -43,7 +43,7 @@
  * @param[in,out] upload_data_size number of bytes (left) in @a upload_data
  * @return MHD result code
  */
-int
+MHD_RESULT
 TAH_MHD_handler_static_response (struct TAH_RequestHandler *rh,
                                  struct MHD_Connection *connection,
                                  void **connection_cls,
@@ -77,7 +77,7 @@ TAH_MHD_handler_static_response (struct TAH_RequestHandler 
*rh,
  * @param[in,out] upload_data_size number of bytes (left) in @a upload_data
  * @return MHD result code
  */
-int
+MHD_RESULT
 TAH_MHD_handler_agpl_redirect (struct TAH_RequestHandler *rh,
                                struct MHD_Connection *connection,
                                void **connection_cls,
diff --git a/src/auditor/taler-auditor-httpd_mhd.h 
b/src/auditor/taler-auditor-httpd_mhd.h
index 1096ee34..1804a186 100644
--- a/src/auditor/taler-auditor-httpd_mhd.h
+++ b/src/auditor/taler-auditor-httpd_mhd.h
@@ -39,7 +39,7 @@
  * @param[in,out] upload_data_size number of bytes (left) in @a upload_data
  * @return MHD result code
  */
-int
+MHD_RESULT
 TAH_MHD_handler_static_response (struct TAH_RequestHandler *rh,
                                  struct MHD_Connection *connection,
                                  void **connection_cls,
@@ -58,7 +58,7 @@ TAH_MHD_handler_static_response (struct TAH_RequestHandler 
*rh,
  * @param[in,out] upload_data_size number of bytes (left) in @a upload_data
  * @return MHD result code
  */
-int
+MHD_RESULT
 TAH_MHD_handler_agpl_redirect (struct TAH_RequestHandler *rh,
                                struct MHD_Connection *connection,
                                void **connection_cls,
diff --git a/src/bank-lib/fakebank.c b/src/bank-lib/fakebank.c
index 9c4aeb6e..6df6cdfa 100644
--- a/src/bank-lib/fakebank.c
+++ b/src/bank-lib/fakebank.c
@@ -25,6 +25,7 @@
 #include "taler_fakebank_lib.h"
 #include "taler_bank_service.h"
 #include "taler_mhd_lib.h"
+#include <gnunet/gnunet_mhd_compat.h>
 
 /**
  * Maximum POST request size (for /admin/add-incoming)
@@ -585,7 +586,7 @@ handle_mhd_completion_callback (void *cls,
  * @param con_cls closure for request (a `struct Buffer *`)
  * @return MHD result code
  */
-static int
+static MHD_RESULT
 handle_admin_add_incoming (struct TALER_FAKEBANK_Handle *h,
                            struct MHD_Connection *connection,
                            const char *account,
@@ -680,7 +681,7 @@ handle_admin_add_incoming (struct TALER_FAKEBANK_Handle *h,
  * @param con_cls closure for request (a `struct Buffer *`)
  * @return MHD result code
  */
-static int
+static MHD_RESULT
 handle_transfer (struct TALER_FAKEBANK_Handle *h,
                  struct MHD_Connection *connection,
                  const char *account,
@@ -800,12 +801,12 @@ handle_transfer (struct TALER_FAKEBANK_Handle *h,
  * @param con_cls place to store state, not used
  * @return MHD result code
  */
-static int
+static MHD_RESULT
 handle_home_page (struct TALER_FAKEBANK_Handle *h,
                   struct MHD_Connection *connection,
                   void **con_cls)
 {
-  int ret;
+  MHD_RESULT ret;
   struct MHD_Response *resp;
 #define HELLOMSG "Hello, Fakebank!"
 
@@ -936,7 +937,7 @@ parse_history_common_args (struct MHD_Connection 
*connection,
  * @param account which account the request is about
  * @return MHD result code
  */
-static int
+static MHD_RESULT
 handle_debit_history (struct TALER_FAKEBANK_Handle *h,
                       struct MHD_Connection *connection,
                       const char *account)
@@ -1051,7 +1052,7 @@ handle_debit_history (struct TALER_FAKEBANK_Handle *h,
  * @param account which account the request is about
  * @return MHD result code
  */
-static int
+static MHD_RESULT
 handle_credit_history (struct TALER_FAKEBANK_Handle *h,
                        struct MHD_Connection *connection,
                        const char *account)
@@ -1198,7 +1199,7 @@ handle_credit_history (struct TALER_FAKEBANK_Handle *h,
  * @param con_cls closure for request (a `struct Buffer *`)
  * @return MHD result code
  */
-static int
+static MHD_RESULT
 serve (struct TALER_FAKEBANK_Handle *h,
        struct MHD_Connection *connection,
        const char *account,
@@ -1279,7 +1280,7 @@ serve (struct TALER_FAKEBANK_Handle *h,
  * @param con_cls closure for request (a `struct Buffer *`)
  * @return MHD result code
  */
-static int
+static MHD_RESULT
 handle_mhd_request (void *cls,
                     struct MHD_Connection *connection,
                     const char *url,
@@ -1292,7 +1293,7 @@ handle_mhd_request (void *cls,
   struct TALER_FAKEBANK_Handle *h = cls;
   char *account = NULL;
   char *end;
-  int ret;
+  MHD_RESULT ret;
 
   (void) version;
   GNUNET_log (GNUNET_ERROR_TYPE_INFO,
diff --git a/src/exchange/taler-exchange-httpd.c 
b/src/exchange/taler-exchange-httpd.c
index de251acb..a8e29d30 100644
--- a/src/exchange/taler-exchange-httpd.c
+++ b/src/exchange/taler-exchange-httpd.c
@@ -42,7 +42,7 @@
 #include "taler-exchange-httpd_keystate.h"
 #include "taler-exchange-httpd_wire.h"
 #include "taler_exchangedb_plugin.h"
-
+#include <gnunet/gnunet_mhd_compat.h>
 
 /**
  * Backlog for listen operation on unix domain sockets.
@@ -158,7 +158,7 @@ static unsigned long long req_max;
  * @param root uploaded JSON data
  * @return MHD result code
  */
-typedef int
+typedef MHD_RESULT
 (*CoinOpHandler)(struct MHD_Connection *connection,
                  const struct TALER_CoinSpendPublicKeyP *coin_pub,
                  const json_t *root);
@@ -175,7 +175,7 @@ typedef int
  *         reserve public key, the second one should be "withdraw")
  * @return MHD result code
  */
-static int
+static MHD_RESULT
 handle_post_coins (const struct TEH_RequestHandler *rh,
                    struct MHD_Connection *connection,
                    const json_t *root,
@@ -297,7 +297,7 @@ handle_mhd_completion_callback (void *cls,
  * @param[in,out] upload_data_size number of bytes in @a upload_data
  * @return MHD result code
  */
-static int
+static MHD_RESULT
 proceed_with_handler (const struct TEH_RequestHandler *rh,
                       struct MHD_Connection *connection,
                       const char *url,
@@ -308,7 +308,7 @@ proceed_with_handler (const struct TEH_RequestHandler *rh,
   const char *args[rh->nargs + 1];
   size_t ulen = strlen (url) + 1;
   json_t *root = NULL;
-  int ret;
+  MHD_RESULT ret;
 
   /* We do check for "ulen" here, because we'll later stack-allocate a buffer
      of that size and don't want to enable malicious clients to cause us
@@ -331,7 +331,7 @@ proceed_with_handler (const struct TEH_RequestHandler *rh,
   if (0 == strcasecmp (rh->method,
                        MHD_HTTP_METHOD_POST))
   {
-    int res;
+    enum GNUNET_GenericReturnValue res;
 
     res = TALER_MHD_parse_post_json (connection,
                                      inner_cls,
@@ -433,7 +433,7 @@ proceed_with_handler (const struct TEH_RequestHandler *rh,
  * @param con_cls closure for request (a `struct Buffer *`)
  * @return MHD result code
  */
-static int
+static MHD_RESULT
 handle_mhd_request (void *cls,
                     struct MHD_Connection *connection,
                     const char *url,
@@ -606,7 +606,7 @@ handle_mhd_request (void *cls,
   /* on repeated requests, check our cache first */
   if (NULL != ecls->rh)
   {
-    int ret;
+    MHD_RESULT ret;
     const char *start;
 
     if ('\0' == url[0])
@@ -669,7 +669,7 @@ handle_mhd_request (void *cls,
       if (0 == strcasecmp (method,
                            rh->method))
       {
-        int ret;
+        MHD_RESULT ret;
 
         /* cache to avoid the loop next time */
         ecls->rh = rh;
@@ -698,7 +698,7 @@ handle_mhd_request (void *cls,
 
   /* No handler matches, generate not found */
   {
-    int ret;
+    MHD_RESULT ret;
 
     ret = TALER_MHD_reply_with_error (connection,
                                       MHD_HTTP_NOT_FOUND,
@@ -716,7 +716,7 @@ handle_mhd_request (void *cls,
  *
  * @return #GNUNET_OK on success
  */
-static int
+static enum GNUNET_GenericReturnValue
 exchange_serve_process_config (void)
 {
   if (GNUNET_OK !=
diff --git a/src/exchange/taler-exchange-httpd.h 
b/src/exchange/taler-exchange-httpd.h
index 512fae8f..b1e8079f 100644
--- a/src/exchange/taler-exchange-httpd.h
+++ b/src/exchange/taler-exchange-httpd.h
@@ -26,6 +26,7 @@
 #include <microhttpd.h>
 #include "taler_json_lib.h"
 #include "taler_crypto_lib.h"
+#include <gnunet/gnunet_mhd_compat.h>
 
 
 /**
@@ -100,9 +101,9 @@ struct TEH_RequestHandler
      * @param args array of arguments, needs to be of length @e args_expected
      * @return MHD result code
      */
-    int (*get)(const struct TEH_RequestHandler *rh,
-               struct MHD_Connection *connection,
-               const char *const args[]);
+    MHD_RESULT (*get)(const struct TEH_RequestHandler *rh,
+                      struct MHD_Connection *connection,
+                      const char *const args[]);
 
 
     /**
@@ -115,10 +116,10 @@ struct TEH_RequestHandler
      * @param args array of arguments, needs to be of length @e args_expected
      * @return MHD result code
      */
-    int (*post)(const struct TEH_RequestHandler *rh,
-                struct MHD_Connection *connection,
-                const json_t *root,
-                const char *const args[]);
+    MHD_RESULT (*post)(const struct TEH_RequestHandler *rh,
+                       struct MHD_Connection *connection,
+                       const json_t *root,
+                       const char *const args[]);
 
   } handler;
 
diff --git a/src/exchange/taler-exchange-httpd_db.c 
b/src/exchange/taler-exchange-httpd_db.c
index f9811622..2e8f0a02 100644
--- a/src/exchange/taler-exchange-httpd_db.c
+++ b/src/exchange/taler-exchange-httpd_db.c
@@ -58,7 +58,7 @@ enum GNUNET_DB_QueryStatus
 TEH_DB_know_coin_transaction (void *cls,
                               struct MHD_Connection *connection,
                               struct TALER_EXCHANGEDB_Session *session,
-                              int *mhd_ret)
+                              MHD_RESULT *mhd_ret)
 {
   struct TEH_DB_KnowCoinContext *kcc = cls;
   enum GNUNET_DB_QueryStatus qs;
@@ -96,10 +96,10 @@ TEH_DB_know_coin_transaction (void *cls,
  * @param cb_cls closure for @a cb, must be read-only!
  * @return #GNUNET_OK on success, #GNUNET_SYSERR on failure
  */
-int
+enum GNUNET_GenericReturnValue
 TEH_DB_run_transaction (struct MHD_Connection *connection,
                         const char *name,
-                        int *mhd_ret,
+                        MHD_RESULT *mhd_ret,
                         TEH_DB_TransactionCallback cb,
                         void *cb_cls)
 {
diff --git a/src/exchange/taler-exchange-httpd_db.h 
b/src/exchange/taler-exchange-httpd_db.h
index 380f00d3..f97f488d 100644
--- a/src/exchange/taler-exchange-httpd_db.h
+++ b/src/exchange/taler-exchange-httpd_db.h
@@ -23,6 +23,7 @@
 
 #include <microhttpd.h>
 #include "taler_exchangedb_plugin.h"
+#include <gnunet/gnunet_mhd_compat.h>
 
 
 /**
@@ -60,7 +61,7 @@ enum GNUNET_DB_QueryStatus
 TEH_DB_know_coin_transaction (void *cls,
                               struct MHD_Connection *connection,
                               struct TALER_EXCHANGEDB_Session *session,
-                              int *mhd_ret);
+                              MHD_RESULT *mhd_ret);
 
 
 /**
@@ -82,7 +83,7 @@ typedef enum GNUNET_DB_QueryStatus
 (*TEH_DB_TransactionCallback)(void *cls,
                               struct MHD_Connection *connection,
                               struct TALER_EXCHANGEDB_Session *session,
-                              int *mhd_ret);
+                              MHD_RESULT *mhd_ret);
 
 
 /**
@@ -101,10 +102,10 @@ typedef enum GNUNET_DB_QueryStatus
  * @param cb_cls closure for @a cb, must be read-only!
  * @return #GNUNET_OK on success, #GNUNET_SYSERR on failure
  */
-int
+enum GNUNET_GenericReturnValue
 TEH_DB_run_transaction (struct MHD_Connection *connection,
                         const char *name,
-                        int *mhd_ret,
+                        MHD_RESULT *mhd_ret,
                         TEH_DB_TransactionCallback cb,
                         void *cb_cls);
 
diff --git a/src/exchange/taler-exchange-httpd_deposit.c 
b/src/exchange/taler-exchange-httpd_deposit.c
index d3439165..ad5b8286 100644
--- a/src/exchange/taler-exchange-httpd_deposit.c
+++ b/src/exchange/taler-exchange-httpd_deposit.c
@@ -53,7 +53,7 @@
  * @param amount_without_fee fraction of coin value to deposit, without the fee
  * @return MHD result code
  */
-static int
+static MHD_RESULT
 reply_deposit_success (struct MHD_Connection *connection,
                        const struct TALER_CoinSpendPublicKeyP *coin_pub,
                        const struct GNUNET_HashCode *h_wire,
@@ -133,7 +133,7 @@ static enum GNUNET_DB_QueryStatus
 deposit_transaction (void *cls,
                      struct MHD_Connection *connection,
                      struct TALER_EXCHANGEDB_Session *session,
-                     int *mhd_ret)
+                     MHD_RESULT *mhd_ret)
 {
   struct DepositContext *dc = cls;
   const struct TALER_EXCHANGEDB_Deposit *deposit = dc->deposit;
@@ -301,7 +301,7 @@ check_timestamp_current (struct GNUNET_TIME_Absolute ts)
  * @param root uploaded JSON data
  * @return MHD result code
   */
-int
+MHD_RESULT
 TEH_handler_deposit (struct MHD_Connection *connection,
                      const struct TALER_CoinSpendPublicKeyP *coin_pub,
                      const json_t *root)
@@ -471,7 +471,7 @@ TEH_handler_deposit (struct MHD_Connection *connection,
 
   /* make sure coin is 'known' in database */
   {
-    int mhd_ret;
+    MHD_RESULT mhd_ret;
     struct TEH_DB_KnowCoinContext kcc = {
       .coin = &deposit.coin,
       .connection = connection
@@ -524,7 +524,7 @@ TEH_handler_deposit (struct MHD_Connection *connection,
   /* execute transaction */
   dc.deposit = &deposit;
   {
-    int mhd_ret;
+    MHD_RESULT mhd_ret;
 
     if (GNUNET_OK !=
         TEH_DB_run_transaction (connection,
@@ -541,7 +541,7 @@ TEH_handler_deposit (struct MHD_Connection *connection,
   /* generate regular response */
   {
     struct TALER_Amount amount_without_fee;
-    int res;
+    MHD_RESULT res;
 
     GNUNET_assert (0 <=
                    TALER_amount_subtract (&amount_without_fee,
diff --git a/src/exchange/taler-exchange-httpd_deposit.h 
b/src/exchange/taler-exchange-httpd_deposit.h
index 642e29dd..a4d598a6 100644
--- a/src/exchange/taler-exchange-httpd_deposit.h
+++ b/src/exchange/taler-exchange-httpd_deposit.h
@@ -40,7 +40,7 @@
  * @param root uploaded JSON data
  * @return MHD result code
   */
-int
+MHD_RESULT
 TEH_handler_deposit (struct MHD_Connection *connection,
                      const struct TALER_CoinSpendPublicKeyP *coin_pub,
                      const json_t *root);
diff --git a/src/exchange/taler-exchange-httpd_deposits_get.c 
b/src/exchange/taler-exchange-httpd_deposits_get.c
index 04d24f49..a2226b7e 100644
--- a/src/exchange/taler-exchange-httpd_deposits_get.c
+++ b/src/exchange/taler-exchange-httpd_deposits_get.c
@@ -45,7 +45,7 @@
  * @param exec_time execution time of the wire transfer
  * @return MHD result code
  */
-static int
+static MHD_RESULT
 reply_deposit_details (struct MHD_Connection *connection,
                        const struct GNUNET_HashCode *h_contract_terms,
                        const struct GNUNET_HashCode *h_wire,
@@ -213,7 +213,7 @@ static enum GNUNET_DB_QueryStatus
 deposits_get_transaction (void *cls,
                           struct MHD_Connection *connection,
                           struct TALER_EXCHANGEDB_Session *session,
-                          int *mhd_ret)
+                          MHD_RESULT *mhd_ret)
 {
   struct DepositWtidContext *ctx = cls;
   enum GNUNET_DB_QueryStatus qs;
@@ -258,13 +258,13 @@ deposits_get_transaction (void *cls,
  * @param merchant_pub public key from the merchant
  * @return MHD result code
  */
-static int
+static MHD_RESULT
 handle_track_transaction_request (
   struct MHD_Connection *connection,
   const struct TALER_DepositTrackPS *tps,
   const struct TALER_MerchantPublicKeyP *merchant_pub)
 {
-  int mhd_ret;
+  MHD_RESULT mhd_ret;
   struct DepositWtidContext ctx = {
     .pending = GNUNET_NO,
     .tps = tps,
@@ -310,12 +310,12 @@ handle_track_transaction_request (
  *      h_wire, merchant_pub, h_contract_terms and coin_pub)
  * @return MHD result code
   */
-int
+MHD_RESULT
 TEH_handler_deposits_get (const struct TEH_RequestHandler *rh,
                           struct MHD_Connection *connection,
                           const char *const args[4])
 {
-  int res;
+  enum GNUNET_GenericReturnValue res;
   struct TALER_MerchantSignatureP merchant_sig;
   struct TALER_DepositTrackPS tps = {
     .purpose.size = htonl (sizeof (tps)),
diff --git a/src/exchange/taler-exchange-httpd_deposits_get.h 
b/src/exchange/taler-exchange-httpd_deposits_get.h
index 36d072aa..a745c5de 100644
--- a/src/exchange/taler-exchange-httpd_deposits_get.h
+++ b/src/exchange/taler-exchange-httpd_deposits_get.h
@@ -36,7 +36,7 @@
  *      h_wire, merchant_pub, h_contract_terms and coin_pub)
  * @return MHD result code
   */
-int
+MHD_RESULT
 TEH_handler_deposits_get (const struct TEH_RequestHandler *rh,
                           struct MHD_Connection *connection,
                           const char *const args[4]);
diff --git a/src/exchange/taler-exchange-httpd_keystate.c 
b/src/exchange/taler-exchange-httpd_keystate.c
index acdec8d7..152d2dad 100644
--- a/src/exchange/taler-exchange-httpd_keystate.c
+++ b/src/exchange/taler-exchange-httpd_keystate.c
@@ -669,7 +669,7 @@ static enum GNUNET_DB_QueryStatus
 add_revocations_transaction (void *cls,
                              struct MHD_Connection *connection,
                              struct TALER_EXCHANGEDB_Session *session,
-                             int *mhd_ret)
+                             MHD_RESULT *mhd_ret)
 {
   struct AddRevocationContext *arc = cls;
   enum GNUNET_DB_QueryStatus qs;
@@ -709,7 +709,7 @@ static enum GNUNET_DB_QueryStatus
 add_denomination_transaction (void *cls,
                               struct MHD_Connection *connection,
                               struct TALER_EXCHANGEDB_Session *session,
-                              int *mhd_ret)
+                              MHD_RESULT *mhd_ret)
 {
   const struct TALER_EXCHANGEDB_DenominationKey *dki = cls;
   enum GNUNET_DB_QueryStatus qs;
@@ -2467,12 +2467,12 @@ krd_search_comparator (const void *key,
  * @param args array of additional options (must be empty for this function)
  * @return MHD result code
  */
-int
+MHD_RESULT
 TEH_handler_keys (const struct TEH_RequestHandler *rh,
                   struct MHD_Connection *connection,
                   const char *const args[])
 {
-  int ret;
+  MHD_RESULT ret;
   const char *have_cherrypick;
   const char *have_fakenow;
   struct GNUNET_TIME_Absolute last_issue_date;
diff --git a/src/exchange/taler-exchange-httpd_keystate.h 
b/src/exchange/taler-exchange-httpd_keystate.h
index 65a006bb..86bdc59b 100644
--- a/src/exchange/taler-exchange-httpd_keystate.h
+++ b/src/exchange/taler-exchange-httpd_keystate.h
@@ -220,7 +220,7 @@ TEH_KS_sign_ (const struct 
GNUNET_CRYPTO_EccSignaturePurpose *purpose,
  * @param args array of additional options (must be empty for this function)
  * @return MHD result code
  */
-int
+MHD_RESULT
 TEH_handler_keys (const struct TEH_RequestHandler *rh,
                   struct MHD_Connection *connection,
                   const char *const args[]);
diff --git a/src/exchange/taler-exchange-httpd_link.c 
b/src/exchange/taler-exchange-httpd_link.c
index 4738a435..948c8eb0 100644
--- a/src/exchange/taler-exchange-httpd_link.c
+++ b/src/exchange/taler-exchange-httpd_link.c
@@ -142,7 +142,7 @@ static enum GNUNET_DB_QueryStatus
 link_transaction (void *cls,
                   struct MHD_Connection *connection,
                   struct TALER_EXCHANGEDB_Session *session,
-                  int *mhd_ret)
+                  MHD_RESULT *mhd_ret)
 {
   struct HTD_Context *ctx = cls;
   enum GNUNET_DB_QueryStatus qs;
@@ -180,13 +180,13 @@ link_transaction (void *cls,
  * @param args array of additional options (length: 2, first is the coin_pub, 
second must be "link")
  * @return MHD result code
   */
-int
+MHD_RESULT
 TEH_handler_link (const struct TEH_RequestHandler *rh,
                   struct MHD_Connection *connection,
                   const char *const args[2])
 {
   struct HTD_Context ctx;
-  int mhd_ret;
+  MHD_RESULT mhd_ret;
 
   (void) rh;
   memset (&ctx,
diff --git a/src/exchange/taler-exchange-httpd_link.h 
b/src/exchange/taler-exchange-httpd_link.h
index 6fdcf1cf..4c9651a9 100644
--- a/src/exchange/taler-exchange-httpd_link.h
+++ b/src/exchange/taler-exchange-httpd_link.h
@@ -36,7 +36,7 @@
  * @param args array of additional options (length: 2, first is the coin_pub, 
second must be "link")
  * @return MHD result code
   */
-int
+MHD_RESULT
 TEH_handler_link (const struct TEH_RequestHandler *rh,
                   struct MHD_Connection *connection,
                   const char *const args[2]);
diff --git a/src/exchange/taler-exchange-httpd_melt.c 
b/src/exchange/taler-exchange-httpd_melt.c
index c08c9773..3a0195cf 100644
--- a/src/exchange/taler-exchange-httpd_melt.c
+++ b/src/exchange/taler-exchange-httpd_melt.c
@@ -47,7 +47,7 @@
  * @param residual remaining value of the coin (after subtracting @a tl)
  * @return a MHD result code
  */
-static int
+static MHD_RESULT
 reply_melt_insufficient_funds (
   struct MHD_Connection *connection,
   const struct TALER_CoinSpendPublicKeyP *coin_pub,
@@ -94,7 +94,7 @@ reply_melt_insufficient_funds (
  * @param noreveal_index which index will the client not have to reveal
  * @return a MHD status code
  */
-static int
+static MHD_RESULT
 reply_melt_success (struct MHD_Connection *connection,
                     const struct TALER_RefreshCommitmentP *rc,
                     uint32_t noreveal_index)
@@ -174,7 +174,7 @@ static enum GNUNET_DB_QueryStatus
 refresh_check_melt (struct MHD_Connection *connection,
                     struct TALER_EXCHANGEDB_Session *session,
                     struct MeltContext *rmc,
-                    int *mhd_ret)
+                    MHD_RESULT *mhd_ret)
 {
   struct TALER_EXCHANGEDB_TransactionList *tl;
   struct TALER_Amount spent;
@@ -296,7 +296,7 @@ static enum GNUNET_DB_QueryStatus
 melt_transaction (void *cls,
                   struct MHD_Connection *connection,
                   struct TALER_EXCHANGEDB_Session *session,
-                  int *mhd_ret)
+                  MHD_RESULT *mhd_ret)
 {
   struct MeltContext *rmc = cls;
   enum GNUNET_DB_QueryStatus qs;
@@ -370,7 +370,7 @@ melt_transaction (void *cls,
  * @param[in,out] rmc details about the melt request
  * @return MHD result code
  */
-static int
+static MHD_RESULT
 handle_melt (struct MHD_Connection *connection,
              struct MeltContext *rmc)
 {
@@ -405,7 +405,7 @@ handle_melt (struct MHD_Connection *connection,
 
   /* run database transaction */
   {
-    int mhd_ret;
+    MHD_RESULT mhd_ret;
 
     if (GNUNET_OK !=
         TEH_DB_run_transaction (connection,
@@ -431,7 +431,7 @@ handle_melt (struct MHD_Connection *connection,
  * @param rmc parsed request information
  * @return MHD status code
  */
-static int
+static MHD_RESULT
 check_for_denomination_key (struct MHD_Connection *connection,
                             struct MeltContext *rmc)
 {
@@ -572,7 +572,7 @@ check_for_denomination_key (struct MHD_Connection 
*connection,
   if (GNUNET_NO == coin_is_dirty)
   {
     struct TEH_DB_KnowCoinContext kcc;
-    int mhd_ret;
+    MHD_RESULT mhd_ret;
 
     kcc.coin = &rmc->refresh_session.coin;
     kcc.connection = connection;
@@ -612,13 +612,14 @@ check_for_denomination_key (struct MHD_Connection 
*connection,
  * @param root uploaded JSON data
  * @return MHD result code
  */
-int
+MHD_RESULT
 TEH_handler_melt (struct MHD_Connection *connection,
                   const struct TALER_CoinSpendPublicKeyP *coin_pub,
                   const json_t *root)
 {
   struct MeltContext rmc;
-  int res;
+  enum GNUNET_GenericReturnValue ret;
+  MHD_RESULT res;
   struct GNUNET_JSON_Specification spec[] = {
     TALER_JSON_spec_denomination_signature ("denom_sig",
                                             
&rmc.refresh_session.coin.denom_sig),
@@ -637,11 +638,11 @@ TEH_handler_melt (struct MHD_Connection *connection,
           0,
           sizeof (rmc));
   rmc.refresh_session.coin.coin_pub = *coin_pub;
-  res = TALER_MHD_parse_json_data (connection,
+  ret = TALER_MHD_parse_json_data (connection,
                                    root,
                                    spec);
-  if (GNUNET_OK != res)
-    return (GNUNET_SYSERR == res) ? MHD_NO : MHD_YES;
+  if (GNUNET_OK != ret)
+    return (GNUNET_SYSERR == ret) ? MHD_NO : MHD_YES;
 
   res = check_for_denomination_key (connection,
                                     &rmc);
diff --git a/src/exchange/taler-exchange-httpd_melt.h 
b/src/exchange/taler-exchange-httpd_melt.h
index ad25b471..0edaf247 100644
--- a/src/exchange/taler-exchange-httpd_melt.h
+++ b/src/exchange/taler-exchange-httpd_melt.h
@@ -39,7 +39,7 @@
  * @param root uploaded JSON data
  * @return MHD result code
  */
-int
+MHD_RESULT
 TEH_handler_melt (struct MHD_Connection *connection,
                   const struct TALER_CoinSpendPublicKeyP *coin_pub,
                   const json_t *root);
diff --git a/src/exchange/taler-exchange-httpd_mhd.c 
b/src/exchange/taler-exchange-httpd_mhd.c
index 6d5df6ff..c9c6303b 100644
--- a/src/exchange/taler-exchange-httpd_mhd.c
+++ b/src/exchange/taler-exchange-httpd_mhd.c
@@ -43,7 +43,7 @@
  * @param args array of additional options (must be empty for this function)
  * @return MHD result code
  */
-int
+MHD_RESULT
 TEH_handler_static_response (const struct TEH_RequestHandler *rh,
                              struct MHD_Connection *connection,
                              const char *const args[])
@@ -71,7 +71,7 @@ TEH_handler_static_response (const struct TEH_RequestHandler 
*rh,
  * @param args array of additional options (must be empty for this function)
  * @return MHD result code
  */
-int
+MHD_RESULT
 TEH_handler_agpl_redirect (const struct TEH_RequestHandler *rh,
                            struct MHD_Connection *connection,
                            const char *const args[])
diff --git a/src/exchange/taler-exchange-httpd_mhd.h 
b/src/exchange/taler-exchange-httpd_mhd.h
index 1605032a..7547780d 100644
--- a/src/exchange/taler-exchange-httpd_mhd.h
+++ b/src/exchange/taler-exchange-httpd_mhd.h
@@ -37,7 +37,7 @@
  * @param args array of additional options (must be empty for this function)
  * @return MHD result code
  */
-int
+MHD_RESULT
 TEH_handler_static_response (const struct TEH_RequestHandler *rh,
                              struct MHD_Connection *connection,
                              const char *const args[]);
@@ -52,7 +52,7 @@ TEH_handler_static_response (const struct TEH_RequestHandler 
*rh,
  * @param args array of additional options (must be empty for this function)
  * @return MHD result code
  */
-int
+MHD_RESULT
 TEH_handler_agpl_redirect (const struct TEH_RequestHandler *rh,
                            struct MHD_Connection *connection,
                            const char *const args[]);
diff --git a/src/exchange/taler-exchange-httpd_recoup.c 
b/src/exchange/taler-exchange-httpd_recoup.c
index a3014e78..c1f6ff33 100644
--- a/src/exchange/taler-exchange-httpd_recoup.c
+++ b/src/exchange/taler-exchange-httpd_recoup.c
@@ -123,7 +123,7 @@ static enum GNUNET_DB_QueryStatus
 recoup_transaction (void *cls,
                     struct MHD_Connection *connection,
                     struct TALER_EXCHANGEDB_Session *session,
-                    int *mhd_ret)
+                    MHD_RESULT *mhd_ret)
 {
   struct RecoupContext *pc = cls;
   struct TALER_EXCHANGEDB_TransactionList *tl;
@@ -260,7 +260,7 @@ recoup_transaction (void *cls,
        (0 == pc->amount.value) )
   {
     /* Recoup has no effect: coin fully spent! */
-    int ret;
+    enum GNUNET_DB_QueryStatus ret;
 
     TEH_plugin->rollback (TEH_plugin->cls,
                           session);
@@ -342,7 +342,7 @@ recoup_transaction (void *cls,
  * @param refreshed #GNUNET_YES if the coin was refreshed
  * @return MHD result code
  */
-static int
+static MHD_RESULT
 verify_and_execute_recoup (struct MHD_Connection *connection,
                            const struct TALER_CoinPublicInfo *coin,
                            const struct
@@ -453,7 +453,7 @@ verify_and_execute_recoup (struct MHD_Connection 
*connection,
   /* make sure coin is 'known' in database */
   {
     struct TEH_DB_KnowCoinContext kcc;
-    int mhd_ret;
+    MHD_RESULT mhd_ret;
 
     kcc.coin = coin;
     kcc.connection = connection;
@@ -472,7 +472,7 @@ verify_and_execute_recoup (struct MHD_Connection 
*connection,
   pc.coin = coin;
   pc.refreshed = refreshed;
   {
-    int mhd_ret;
+    MHD_RESULT mhd_ret;
 
     if (GNUNET_OK !=
         TEH_DB_run_transaction (connection,
@@ -512,12 +512,12 @@ verify_and_execute_recoup (struct MHD_Connection 
*connection,
  * @param root uploaded JSON data
  * @return MHD result code
   */
-int
+MHD_RESULT
 TEH_handler_recoup (struct MHD_Connection *connection,
                     const struct TALER_CoinSpendPublicKeyP *coin_pub,
                     const json_t *root)
 {
-  int res;
+  enum GNUNET_GenericReturnValue ret;
   struct TALER_CoinPublicInfo coin;
   struct TALER_DenominationBlindingKeyP coin_bks;
   struct TALER_CoinSpendSignatureP coin_sig;
@@ -538,20 +538,24 @@ TEH_handler_recoup (struct MHD_Connection *connection,
   };
 
   coin.coin_pub = *coin_pub;
-  res = TALER_MHD_parse_json_data (connection,
+  ret = TALER_MHD_parse_json_data (connection,
                                    root,
                                    spec);
-  if (GNUNET_SYSERR == res)
+  if (GNUNET_SYSERR == ret)
     return MHD_NO; /* hard failure */
-  if (GNUNET_NO == res)
+  if (GNUNET_NO == ret)
     return MHD_YES; /* failure */
-  res = verify_and_execute_recoup (connection,
-                                   &coin,
-                                   &coin_bks,
-                                   &coin_sig,
-                                   refreshed);
-  GNUNET_JSON_parse_free (spec);
-  return res;
+  {
+    MHD_RESULT res;
+
+    res = verify_and_execute_recoup (connection,
+                                     &coin,
+                                     &coin_bks,
+                                     &coin_sig,
+                                     refreshed);
+    GNUNET_JSON_parse_free (spec);
+    return res;
+  }
 }
 
 
diff --git a/src/exchange/taler-exchange-httpd_recoup.h 
b/src/exchange/taler-exchange-httpd_recoup.h
index 85fdc139..95e60773 100644
--- a/src/exchange/taler-exchange-httpd_recoup.h
+++ b/src/exchange/taler-exchange-httpd_recoup.h
@@ -37,7 +37,7 @@
  * @param root uploaded JSON data
  * @return MHD result code
   */
-int
+MHD_RESULT
 TEH_handler_recoup (struct MHD_Connection *connection,
                     const struct TALER_CoinSpendPublicKeyP *coin_pub,
                     const json_t *root);
diff --git a/src/exchange/taler-exchange-httpd_refreshes_reveal.c 
b/src/exchange/taler-exchange-httpd_refreshes_reveal.c
index da1b3eb9..916277b9 100644
--- a/src/exchange/taler-exchange-httpd_refreshes_reveal.c
+++ b/src/exchange/taler-exchange-httpd_refreshes_reveal.c
@@ -52,7 +52,7 @@
  * @param sigs array of @a num_freshcoins signatures revealed
  * @return a MHD result code
  */
-static int
+static MHD_RESULT
 reply_refreshes_reveal_success (struct MHD_Connection *connection,
                                 unsigned int num_freshcoins,
                                 const struct TALER_DenominationSignature *sigs)
@@ -235,7 +235,7 @@ static enum GNUNET_DB_QueryStatus
 refreshes_reveal_preflight (void *cls,
                             struct MHD_Connection *connection,
                             struct TALER_EXCHANGEDB_Session *session,
-                            int *mhd_ret)
+                            MHD_RESULT *mhd_ret)
 {
   struct RevealContext *rctx = cls;
   enum GNUNET_DB_QueryStatus qs;
@@ -292,7 +292,7 @@ static enum GNUNET_DB_QueryStatus
 refreshes_reveal_transaction (void *cls,
                               struct MHD_Connection *connection,
                               struct TALER_EXCHANGEDB_Session *session,
-                              int *mhd_ret)
+                              MHD_RESULT *mhd_ret)
 {
   struct RevealContext *rctx = cls;
   struct TALER_EXCHANGEDB_Melt melt;
@@ -482,7 +482,7 @@ static enum GNUNET_DB_QueryStatus
 refreshes_reveal_persist (void *cls,
                           struct MHD_Connection *connection,
                           struct TALER_EXCHANGEDB_Session *session,
-                          int *mhd_ret)
+                          MHD_RESULT *mhd_ret)
 {
   struct RevealContext *rctx = cls;
   enum GNUNET_DB_QueryStatus qs;
@@ -532,7 +532,7 @@ refreshes_reveal_persist (void *cls,
  * @param coin_evs envelopes of gamma-selected coins to be signed
  * @return MHD result code
  */
-static int
+static MHD_RESULT
 resolve_refreshes_reveal_denominations (struct TEH_KS_StateHandle *key_state,
                                         struct MHD_Connection *connection,
                                         struct RevealContext *rctx,
@@ -547,7 +547,8 @@ resolve_refreshes_reveal_denominations (struct 
TEH_KS_StateHandle *key_state,
   struct TALER_RefreshCoinData rcds[num_fresh_coins];
   struct TALER_CoinSpendSignatureP link_sigs[num_fresh_coins];
   struct TALER_EXCHANGEDB_Melt melt;
-  int res;
+  enum GNUNET_GenericReturnValue res;
+  MHD_RESULT ret;
 
   /* Parse denomination key hashes */
   for (unsigned int i = 0; i<num_fresh_coins; i++)
@@ -624,13 +625,13 @@ resolve_refreshes_reveal_denominations (struct 
TEH_KS_StateHandle *key_state,
       switch (qs)
       {
       case GNUNET_DB_STATUS_SUCCESS_NO_RESULTS:
-        res = TALER_MHD_reply_with_error (connection,
+        ret = TALER_MHD_reply_with_error (connection,
                                           MHD_HTTP_NOT_FOUND,
                                           TALER_EC_REVEAL_SESSION_UNKNOWN,
                                           "rc");
         break;
       case GNUNET_DB_STATUS_HARD_ERROR:
-        res = TALER_MHD_reply_with_error (connection,
+        ret = TALER_MHD_reply_with_error (connection,
                                           MHD_HTTP_INTERNAL_SERVER_ERROR,
                                           
TALER_EC_REVEAL_DB_FETCH_SESSION_ERROR,
                                           "failed to fetch session data");
@@ -638,7 +639,7 @@ resolve_refreshes_reveal_denominations (struct 
TEH_KS_StateHandle *key_state,
       case GNUNET_DB_STATUS_SOFT_ERROR:
       default:
         GNUNET_break (0);   /* should be impossible */
-        res = TALER_MHD_reply_with_error (connection,
+        ret = TALER_MHD_reply_with_error (connection,
                                           MHD_HTTP_INTERNAL_SERVER_ERROR,
                                           TALER_EC_INTERNAL_INVARIANT_FAILURE,
                                           "assertion failed (unexpected 
database serialization error)");
@@ -683,7 +684,7 @@ resolve_refreshes_reveal_denominations (struct 
TEH_KS_StateHandle *key_state,
             &melt.session.coin.coin_pub.eddsa_pub))
       {
         GNUNET_break_op (0);
-        res = TALER_MHD_reply_with_error (connection,
+        ret = TALER_MHD_reply_with_error (connection,
                                           MHD_HTTP_FORBIDDEN,
                                           
TALER_EC_REVEAL_LINK_SIGNATURE_INVALID,
                                           "link_sig");
@@ -710,7 +711,7 @@ resolve_refreshes_reveal_denominations (struct 
TEH_KS_StateHandle *key_state,
     if (NULL == rctx->ev_sigs[i].rsa_signature)
     {
       GNUNET_break (0);
-      res = TALER_MHD_reply_with_error (connection,
+      ret = TALER_MHD_reply_with_error (connection,
                                         MHD_HTTP_INTERNAL_SERVER_ERROR,
                                         TALER_EC_REVEAL_SIGNING_ERROR,
                                         "internal signing error");
@@ -729,17 +730,17 @@ resolve_refreshes_reveal_denominations (struct 
TEH_KS_StateHandle *key_state,
     if ( (GNUNET_OK ==
           TEH_DB_run_transaction (connection,
                                   "reveal pre-check",
-                                  &res,
+                                  &ret,
                                   &refreshes_reveal_preflight,
                                   rctx)) &&
          (GNUNET_YES == rctx->preflight_ok) )
     {
       /* Generate final (positive) response */
       GNUNET_assert (NULL != rctx->ev_sigs);
-      res = reply_refreshes_reveal_success (connection,
+      ret = reply_refreshes_reveal_success (connection,
                                             num_fresh_coins,
                                             rctx->ev_sigs);
-      GNUNET_break (MHD_NO != res);
+      GNUNET_break (MHD_NO != ret);
       goto cleanup;   /* aka 'break' */
     }
     if (GNUNET_SYSERR == rctx->preflight_ok)
@@ -750,7 +751,7 @@ resolve_refreshes_reveal_denominations (struct 
TEH_KS_StateHandle *key_state,
     if (GNUNET_OK !=
         TEH_DB_run_transaction (connection,
                                 "run reveal",
-                                &res,
+                                &ret,
                                 &refreshes_reveal_transaction,
                                 rctx))
     {
@@ -761,13 +762,13 @@ resolve_refreshes_reveal_denominations (struct 
TEH_KS_StateHandle *key_state,
     if (GNUNET_OK ==
         TEH_DB_run_transaction (connection,
                                 "persist reveal",
-                                &res,
+                                &ret,
                                 &refreshes_reveal_persist,
                                 rctx))
     {
       /* Generate final (positive) response */
       GNUNET_assert (NULL != rctx->ev_sigs);
-      res = reply_refreshes_reveal_success (connection,
+      ret = reply_refreshes_reveal_success (connection,
                                             num_fresh_coins,
                                             rctx->ev_sigs);
       break;
@@ -778,7 +779,7 @@ resolve_refreshes_reveal_denominations (struct 
TEH_KS_StateHandle *key_state,
   }   /* end for (retries...) */
 
 cleanup:
-  GNUNET_break (MHD_NO != res);
+  GNUNET_break (MHD_NO != ret);
   /* free resources */
   if (NULL != rctx->ev_sigs)
   {
@@ -790,7 +791,7 @@ cleanup:
   }
   for (unsigned int i = 0; i<num_fresh_coins; i++)
     GNUNET_free_non_null (rcds[i].coin_ev);
-  return res;
+  return ret;
 }
 
 
@@ -908,7 +909,7 @@ handle_refreshes_reveal_json (struct MHD_Connection 
*connection,
  * @param args array of additional options (length: 2, session hash and the 
string "reveal")
  * @return MHD result code
  */
-int
+MHD_RESULT
 TEH_handler_reveal (const struct TEH_RequestHandler *rh,
                     struct MHD_Connection *connection,
                     const json_t *root,
diff --git a/src/exchange/taler-exchange-httpd_refreshes_reveal.h 
b/src/exchange/taler-exchange-httpd_refreshes_reveal.h
index 076ec52d..b9806dbd 100644
--- a/src/exchange/taler-exchange-httpd_refreshes_reveal.h
+++ b/src/exchange/taler-exchange-httpd_refreshes_reveal.h
@@ -43,7 +43,7 @@
  * @param args array of additional options (length: 2, session hash and the 
string "reveal")
  * @return MHD result code
  */
-int
+MHD_RESULT
 TEH_handler_reveal (const struct TEH_RequestHandler *rh,
                     struct MHD_Connection *connection,
                     const json_t *root,
diff --git a/src/exchange/taler-exchange-httpd_refund.c 
b/src/exchange/taler-exchange-httpd_refund.c
index 036a0473..7c2b149f 100644
--- a/src/exchange/taler-exchange-httpd_refund.c
+++ b/src/exchange/taler-exchange-httpd_refund.c
@@ -43,7 +43,7 @@
  * @param refund details about the successful refund
  * @return MHD result code
  */
-static int
+static MHD_RESULT
 reply_refund_success (struct MHD_Connection *connection,
                       const struct TALER_CoinSpendPublicKeyP *coin_pub,
                       const struct TALER_EXCHANGEDB_RefundListEntry *refund)
@@ -104,7 +104,7 @@ static enum GNUNET_DB_QueryStatus
 refund_transaction (void *cls,
                     struct MHD_Connection *connection,
                     struct TALER_EXCHANGEDB_Session *session,
-                    int *mhd_ret)
+                    MHD_RESULT *mhd_ret)
 {
   const struct TALER_EXCHANGEDB_Refund *refund = cls;
   struct TALER_EXCHANGEDB_TransactionList *tl;
@@ -342,7 +342,7 @@ refund_transaction (void *cls,
  * @param refund information about the refund
  * @return MHD result code
  */
-static int
+static MHD_RESULT
 verify_and_execute_refund (struct MHD_Connection *connection,
                            const struct TALER_EXCHANGEDB_Refund *refund)
 {
@@ -468,7 +468,7 @@ verify_and_execute_refund (struct MHD_Connection 
*connection,
 
   /* Finally run the actual transaction logic */
   {
-    int mhd_ret;
+    MHD_RESULT mhd_ret;
 
     if (GNUNET_OK !=
         TEH_DB_run_transaction (connection,
@@ -497,7 +497,7 @@ verify_and_execute_refund (struct MHD_Connection 
*connection,
  * @param root uploaded JSON data
  * @return MHD result code
   */
-int
+MHD_RESULT
 TEH_handler_refund (struct MHD_Connection *connection,
                     const struct TALER_CoinSpendPublicKeyP *coin_pub,
                     const json_t *root)
@@ -517,7 +517,7 @@ TEH_handler_refund (struct MHD_Connection *connection,
 
   refund.coin.coin_pub = *coin_pub;
   {
-    int res;
+    enum GNUNET_GenericReturnValue res;
 
     res = TALER_MHD_parse_json_data (connection,
                                      root,
@@ -549,7 +549,7 @@ TEH_handler_refund (struct MHD_Connection *connection,
                                        "refund_amount");
   }
   {
-    int res;
+    MHD_RESULT res;
 
     res = verify_and_execute_refund (connection,
                                      &refund);
diff --git a/src/exchange/taler-exchange-httpd_refund.h 
b/src/exchange/taler-exchange-httpd_refund.h
index ad6387d6..92480b77 100644
--- a/src/exchange/taler-exchange-httpd_refund.h
+++ b/src/exchange/taler-exchange-httpd_refund.h
@@ -38,8 +38,8 @@
  * @param coin_pub public key of the coin
  * @param root uploaded JSON data
  * @return MHD result code
-  */
-int
+ */
+MHD_RESULT
 TEH_handler_refund (struct MHD_Connection *connection,
                     const struct TALER_CoinSpendPublicKeyP *coin_pub,
                     const json_t *root);
diff --git a/src/exchange/taler-exchange-httpd_reserves_get.c 
b/src/exchange/taler-exchange-httpd_reserves_get.c
index dbbb7270..cbc6b422 100644
--- a/src/exchange/taler-exchange-httpd_reserves_get.c
+++ b/src/exchange/taler-exchange-httpd_reserves_get.c
@@ -37,7 +37,7 @@
  * @param rh reserve history to return
  * @return MHD result code
  */
-static int
+static MHD_RESULT
 reply_reserve_history_success (struct MHD_Connection *connection,
                                const struct TALER_EXCHANGEDB_ReserveHistory 
*rh)
 {
@@ -100,7 +100,7 @@ static enum GNUNET_DB_QueryStatus
 reserve_history_transaction (void *cls,
                              struct MHD_Connection *connection,
                              struct TALER_EXCHANGEDB_Session *session,
-                             int *mhd_ret)
+                             MHD_RESULT *mhd_ret)
 {
   struct ReserveHistoryContext *rsc = cls;
 
@@ -124,13 +124,13 @@ reserve_history_transaction (void *cls,
  * @param args array of additional options (length: 1, just the reserve_pub)
  * @return MHD result code
  */
-int
+MHD_RESULT
 TEH_handler_reserves_get (const struct TEH_RequestHandler *rh,
                           struct MHD_Connection *connection,
                           const char *const args[1])
 {
   struct ReserveHistoryContext rsc;
-  int mhd_ret;
+  MHD_RESULT mhd_ret;
 
   (void) rh;
   if (GNUNET_OK !=
diff --git a/src/exchange/taler-exchange-httpd_reserves_get.h 
b/src/exchange/taler-exchange-httpd_reserves_get.h
index e59d3e03..b46a6a44 100644
--- a/src/exchange/taler-exchange-httpd_reserves_get.h
+++ b/src/exchange/taler-exchange-httpd_reserves_get.h
@@ -38,7 +38,7 @@
  * @param args array of additional options (length: 1, just the reserve_pub)
  * @return MHD result code
  */
-int
+MHD_RESULT
 TEH_handler_reserves_get (const struct TEH_RequestHandler *rh,
                           struct MHD_Connection *connection,
                           const char *const args[1]);
diff --git a/src/exchange/taler-exchange-httpd_responses.c 
b/src/exchange/taler-exchange-httpd_responses.c
index 3870db14..06673afc 100644
--- a/src/exchange/taler-exchange-httpd_responses.c
+++ b/src/exchange/taler-exchange-httpd_responses.c
@@ -411,7 +411,7 @@ TEH_RESPONSE_compile_transaction_history (
  * @param tl transaction list to use to build reply
  * @return MHD result code
  */
-int
+MHD_RESULT
 TEH_RESPONSE_reply_coin_insufficient_funds (
   struct MHD_Connection *connection,
   enum TALER_ErrorCode ec,
diff --git a/src/exchange/taler-exchange-httpd_responses.h 
b/src/exchange/taler-exchange-httpd_responses.h
index 5dd98174..6486b5d9 100644
--- a/src/exchange/taler-exchange-httpd_responses.h
+++ b/src/exchange/taler-exchange-httpd_responses.h
@@ -31,6 +31,7 @@
 #include "taler_error_codes.h"
 #include "taler-exchange-httpd.h"
 #include "taler-exchange-httpd_db.h"
+#include <gnunet/gnunet_mhd_compat.h>
 
 
 /**
@@ -59,7 +60,7 @@ TEH_RESPONSE_compile_reserve_history (
  * @param tl transaction list to use to build reply
  * @return MHD result code
  */
-int
+MHD_RESULT
 TEH_RESPONSE_reply_coin_insufficient_funds (
   struct MHD_Connection *connection,
   enum TALER_ErrorCode ec,
diff --git a/src/exchange/taler-exchange-httpd_terms.c 
b/src/exchange/taler-exchange-httpd_terms.c
index 121e1c78..1c703021 100644
--- a/src/exchange/taler-exchange-httpd_terms.c
+++ b/src/exchange/taler-exchange-httpd_terms.c
@@ -46,7 +46,7 @@ static struct TALER_MHD_Legal *pp;
  * @param args array of additional options (must be empty for this function)
  * @return MHD result code
  */
-int
+MHD_RESULT
 TEH_handler_terms (const struct TEH_RequestHandler *rh,
                    struct MHD_Connection *connection,
                    const char *const args[])
@@ -66,7 +66,7 @@ TEH_handler_terms (const struct TEH_RequestHandler *rh,
  * @param args array of additional options (must be empty for this function)
  * @return MHD result code
  */
-int
+MHD_RESULT
 TEH_handler_privacy (const struct TEH_RequestHandler *rh,
                      struct MHD_Connection *connection,
                      const char *const args[])
diff --git a/src/exchange/taler-exchange-httpd_terms.h 
b/src/exchange/taler-exchange-httpd_terms.h
index 7fe7774a..3cbd3688 100644
--- a/src/exchange/taler-exchange-httpd_terms.h
+++ b/src/exchange/taler-exchange-httpd_terms.h
@@ -37,7 +37,7 @@
  * @param args array of additional options (must be empty for this function)
  * @return MHD result code
  */
-int
+MHD_RESULT
 TEH_handler_terms (const struct TEH_RequestHandler *rh,
                    struct MHD_Connection *connection,
                    const char *const args[]);
@@ -51,7 +51,7 @@ TEH_handler_terms (const struct TEH_RequestHandler *rh,
  * @param args array of additional options (must be empty for this function)
  * @return MHD result code
  */
-int
+MHD_RESULT
 TEH_handler_privacy (const struct TEH_RequestHandler *rh,
                      struct MHD_Connection *connection,
                      const char *const args[]);
diff --git a/src/exchange/taler-exchange-httpd_transfers_get.c 
b/src/exchange/taler-exchange-httpd_transfers_get.c
index 2aa9a5c9..a5b21244 100644
--- a/src/exchange/taler-exchange-httpd_transfers_get.c
+++ b/src/exchange/taler-exchange-httpd_transfers_get.c
@@ -83,7 +83,7 @@ struct AggregatedDepositDetail
  * @param wdd_head linked list with details about the combined deposits
  * @return MHD result code
  */
-static int
+static MHD_RESULT
 reply_transfer_details (struct MHD_Connection *connection,
                         const struct TALER_Amount *total,
                         const struct TALER_MerchantPublicKeyP *merchant_pub,
@@ -421,7 +421,7 @@ static enum GNUNET_DB_QueryStatus
 get_transfer_deposits (void *cls,
                        struct MHD_Connection *connection,
                        struct TALER_EXCHANGEDB_Session *session,
-                       int *mhd_ret)
+                       MHD_RESULT *mhd_ret)
 {
   struct WtidTransactionContext *ctx = cls;
   enum GNUNET_DB_QueryStatus qs;
@@ -513,13 +513,13 @@ get_transfer_deposits (void *cls,
  * @param args array of additional options (length: 1, just the wtid)
  * @return MHD result code
  */
-int
+MHD_RESULT
 TEH_handler_transfers_get (const struct TEH_RequestHandler *rh,
                            struct MHD_Connection *connection,
                            const char *const args[1])
 {
   struct WtidTransactionContext ctx;
-  int mhd_ret;
+  MHD_RESULT mhd_ret;
 
   (void) rh;
   memset (&ctx,
diff --git a/src/exchange/taler-exchange-httpd_transfers_get.h 
b/src/exchange/taler-exchange-httpd_transfers_get.h
index 37f7dfbd..83c17334 100644
--- a/src/exchange/taler-exchange-httpd_transfers_get.h
+++ b/src/exchange/taler-exchange-httpd_transfers_get.h
@@ -34,7 +34,7 @@
  * @param args array of additional options (length: 1, just the wtid)
  * @return MHD result code
  */
-int
+MHD_RESULT
 TEH_handler_transfers_get (const struct TEH_RequestHandler *rh,
                            struct MHD_Connection *connection,
                            const char *const args[1]);
diff --git a/src/exchange/taler-exchange-httpd_wire.c 
b/src/exchange/taler-exchange-httpd_wire.c
index cb63355b..38bbad4a 100644
--- a/src/exchange/taler-exchange-httpd_wire.c
+++ b/src/exchange/taler-exchange-httpd_wire.c
@@ -295,7 +295,7 @@ load_account (void *cls,
  * @param args array of additional options (must be empty for this function)
  * @return MHD result code
   */
-int
+MHD_RESULT
 TEH_handler_wire (const struct TEH_RequestHandler *rh,
                   struct MHD_Connection *connection,
                   const char *const args[])
diff --git a/src/exchange/taler-exchange-httpd_wire.h 
b/src/exchange/taler-exchange-httpd_wire.h
index 219f1711..7df87432 100644
--- a/src/exchange/taler-exchange-httpd_wire.h
+++ b/src/exchange/taler-exchange-httpd_wire.h
@@ -52,7 +52,7 @@ TEH_WIRE_done (void);
  * @param args array of additional options (must be empty for this function)
  * @return MHD result code
  */
-int
+MHD_RESULT
 TEH_handler_wire (const struct TEH_RequestHandler *rh,
                   struct MHD_Connection *connection,
                   const char *const args[]);
diff --git a/src/exchange/taler-exchange-httpd_withdraw.c 
b/src/exchange/taler-exchange-httpd_withdraw.c
index 152ebfbb..4d662e71 100644
--- a/src/exchange/taler-exchange-httpd_withdraw.c
+++ b/src/exchange/taler-exchange-httpd_withdraw.c
@@ -51,7 +51,7 @@
  * @param rh reserve history to return
  * @return MHD result code
  */
-static int
+static MHD_RESULT
 reply_withdraw_insufficient_funds (
   struct MHD_Connection *connection,
   const struct TALER_Amount *ebalance,
@@ -173,7 +173,7 @@ static enum GNUNET_DB_QueryStatus
 withdraw_transaction (void *cls,
                       struct MHD_Connection *connection,
                       struct TALER_EXCHANGEDB_Session *session,
-                      int *mhd_ret)
+                      MHD_RESULT *mhd_ret)
 {
   struct WithdrawContext *wc = cls;
   struct TALER_EXCHANGEDB_Reserve r;
@@ -343,7 +343,7 @@ withdraw_transaction (void *cls,
  *         reserve public key, the second one should be "withdraw")
  * @return MHD result code
  */
-int
+MHD_RESULT
 TEH_handler_withdraw (const struct TEH_RequestHandler *rh,
                       struct MHD_Connection *connection,
                       const json_t *root,
@@ -376,7 +376,7 @@ TEH_handler_withdraw (const struct TEH_RequestHandler *rh,
   }
 
   {
-    int res;
+    enum GNUNET_GenericReturnValue res;
 
     res = TALER_MHD_parse_json_data (connection,
                                      root,
@@ -486,7 +486,7 @@ TEH_handler_withdraw (const struct TEH_RequestHandler *rh,
 
   /* run transaction and sign (if not optimistically signed before) */
   {
-    int mhd_ret;
+    MHD_RESULT mhd_ret;
 
     if (GNUNET_OK !=
         TEH_DB_run_transaction (connection,
@@ -510,7 +510,7 @@ TEH_handler_withdraw (const struct TEH_RequestHandler *rh,
   GNUNET_JSON_parse_free (spec);
 
   {
-    int ret;
+    MHD_RESULT ret;
 
     ret = TALER_MHD_reply_json_pack (
       connection,
diff --git a/src/exchange/taler-exchange-httpd_withdraw.h 
b/src/exchange/taler-exchange-httpd_withdraw.h
index 7fc2fa01..8b248597 100644
--- a/src/exchange/taler-exchange-httpd_withdraw.h
+++ b/src/exchange/taler-exchange-httpd_withdraw.h
@@ -42,7 +42,7 @@
  *         reserve public key, the second one should be "withdraw")
  * @return MHD result code
   */
-int
+MHD_RESULT
 TEH_handler_withdraw (const struct TEH_RequestHandler *rh,
                       struct MHD_Connection *connection,
                       const json_t *root,
diff --git a/src/include/taler_mhd_lib.h b/src/include/taler_mhd_lib.h
index 7100ad95..71006e8b 100644
--- a/src/include/taler_mhd_lib.h
+++ b/src/include/taler_mhd_lib.h
@@ -27,6 +27,8 @@
 #include <jansson.h>
 #include <microhttpd.h>
 #include "taler_error_codes.h"
+#include <gnunet/gnunet_mhd_compat.h>
+
 
 /**
  * Global options for response generation.
@@ -79,7 +81,7 @@ TALER_MHD_add_global_headers (struct MHD_Response *response);
  * @param[in,out] buf_size pointer to initial size of @a buf
  * @return #MHD_YES if @a buf was compressed
  */
-int
+MHD_RESULT
 TALER_MHD_body_compress (void **buf,
                          size_t *buf_size);
 
@@ -90,7 +92,7 @@ TALER_MHD_body_compress (void **buf,
  * @param connection connection to check
  * @return #MHD_YES if 'deflate' compression is allowed
  */
-int
+MHD_RESULT
 TALER_MHD_can_compress (struct MHD_Connection *connection);
 
 
@@ -102,7 +104,7 @@ TALER_MHD_can_compress (struct MHD_Connection *connection);
  * @param response_code the http response code
  * @return MHD result code
  */
-int
+MHD_RESULT
 TALER_MHD_reply_json (struct MHD_Connection *connection,
                       const json_t *json,
                       unsigned int response_code);
@@ -118,7 +120,7 @@ TALER_MHD_reply_json (struct MHD_Connection *connection,
  * @param ... varargs
  * @return MHD result code
  */
-int
+MHD_RESULT
 TALER_MHD_reply_json_pack (struct MHD_Connection *connection,
                            unsigned int response_code,
                            const char *fmt,
@@ -134,7 +136,7 @@ TALER_MHD_reply_json_pack (struct MHD_Connection 
*connection,
  * @param hint human readable hint about the error
  * @return a MHD result code
  */
-int
+MHD_RESULT
 TALER_MHD_reply_with_error (struct MHD_Connection *connection,
                             unsigned int http_status,
                             enum TALER_ErrorCode ec,
@@ -181,7 +183,7 @@ TALER_MHD_make_error (enum TALER_ErrorCode ec,
  * @param connection the MHD connection to use
  * @return a MHD result code
  */
-int
+MHD_RESULT
 TALER_MHD_reply_request_too_large (struct MHD_Connection *connection);
 
 
@@ -193,7 +195,7 @@ TALER_MHD_reply_request_too_large (struct MHD_Connection 
*connection);
  * @param url where to redirect for the sources
  * @return MHD result code
  */
-int
+MHD_RESULT
 TALER_MHD_reply_agpl (struct MHD_Connection *connection,
                       const char *url);
 
@@ -209,7 +211,7 @@ TALER_MHD_reply_agpl (struct MHD_Connection *connection,
  * @param body_size number of bytes in @a body
  * @return MHD result code
  */
-int
+MHD_RESULT
 TALER_MHD_reply_static (struct MHD_Connection *connection,
                         unsigned int http_status,
                         const char *mime_type,
@@ -241,7 +243,7 @@ TALER_MHD_reply_static (struct MHD_Connection *connection,
  *               (we could not even queue an error message,
  *                close HTTP session with MHD_NO)
  */
-int
+enum GNUNET_GenericReturnValue
 TALER_MHD_parse_post_json (struct MHD_Connection *connection,
                            void **con_cls,
                            const char *upload_data,
@@ -274,7 +276,7 @@ TALER_MHD_parse_post_cleanup_callback (void *con_cls);
  *    #GNUNET_NO if json is malformed, error response was generated
  *    #GNUNET_SYSERR on internal error
  */
-int
+enum GNUNET_GenericReturnValue
 TALER_MHD_parse_json_data (struct MHD_Connection *connection,
                            const json_t *root,
                            struct GNUNET_JSON_Specification *spec);
@@ -295,7 +297,7 @@ TALER_MHD_parse_json_data (struct MHD_Connection 
*connection,
  *    #GNUNET_NO if json is malformed, error response was generated
  *    #GNUNET_SYSERR on internal error
  */
-int
+enum GNUNET_GenericReturnValue
 TALER_MHD_parse_json_array (struct MHD_Connection *connection,
                             const json_t *root,
                             struct GNUNET_JSON_Specification *spec,
@@ -317,7 +319,7 @@ TALER_MHD_parse_json_array (struct MHD_Connection 
*connection,
  *   #GNUNET_NO if the argument is absent or malformed
  *   #GNUNET_SYSERR on internal error (error response could not be sent)
  */
-int
+enum GNUNET_GenericReturnValue
 TALER_MHD_parse_request_arg_data (struct MHD_Connection *connection,
                                   const char *param_name,
                                   void *out_data,
@@ -335,7 +337,7 @@ TALER_MHD_parse_request_arg_data (struct MHD_Connection 
*connection,
  * @param[out] unix_mode set to the mode to be used for @a unix_path
  * @return #GNUNET_OK on success
  */
-int
+enum GNUNET_GenericReturnValue
 TALER_MHD_parse_config (const struct GNUNET_CONFIGURATION_Handle *cfg,
                         const char *section,
                         uint16_t *rport,
@@ -431,7 +433,7 @@ TALER_MHD_legal_free (struct TALER_MHD_Legal *legal);
  * @param legal legal document to serve
  * @return MHD result code
  */
-int
+MHD_RESULT
 TALER_MHD_reply_legal (struct MHD_Connection *conn,
                        struct TALER_MHD_Legal *legal);
 
@@ -443,7 +445,7 @@ TALER_MHD_reply_legal (struct MHD_Connection *conn,
  * @param connection the MHD connection
  * @return MHD result code
  */
-int
+MHD_RESULT
 TALER_MHD_reply_cors_preflight (struct MHD_Connection *connection);
 
 #endif
diff --git a/src/mhd/mhd_config.c b/src/mhd/mhd_config.c
index d8ae1da7..e2471e9b 100644
--- a/src/mhd/mhd_config.c
+++ b/src/mhd/mhd_config.c
@@ -42,7 +42,7 @@
  * @param[out] unix_mode set to the mode to be used for @a unix_path
  * @return #GNUNET_OK on success
  */
-int
+enum GNUNET_GenericReturnValue
 TALER_MHD_parse_config (const struct GNUNET_CONFIGURATION_Handle *cfg,
                         const char *section,
                         uint16_t *rport,
diff --git a/src/mhd/mhd_legal.c b/src/mhd/mhd_legal.c
index 7b1ba1c1..b7859da1 100644
--- a/src/mhd/mhd_legal.c
+++ b/src/mhd/mhd_legal.c
@@ -155,7 +155,7 @@ language_matches (const char *language_pattern,
  * @param legal legal document to serve
  * @return MHD result code
  */
-int
+MHD_RESULT
 TALER_MHD_reply_legal (struct MHD_Connection *conn,
                        struct TALER_MHD_Legal *legal)
 {
@@ -174,7 +174,7 @@ TALER_MHD_reply_legal (struct MHD_Connection *conn,
          (0 == strcasecmp (etag,
                            legal->terms_etag)) )
     {
-      int ret;
+      MHD_RESULT ret;
 
       resp = MHD_create_response_from_buffer (0,
                                               NULL,
@@ -292,7 +292,7 @@ TALER_MHD_reply_legal (struct MHD_Connection *conn,
                                          MHD_HTTP_HEADER_CONTENT_TYPE,
                                          t->mime_type));
   {
-    int ret;
+    MHD_RESULT ret;
 
     ret = MHD_queue_response (conn,
                               MHD_HTTP_OK,
diff --git a/src/mhd/mhd_responses.c b/src/mhd/mhd_responses.c
index 67b9097b..45a9932d 100644
--- a/src/mhd/mhd_responses.c
+++ b/src/mhd/mhd_responses.c
@@ -80,7 +80,7 @@ TALER_MHD_add_global_headers (struct MHD_Response *response)
  * itself.  This should eventually be fixed, see also
  * https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html
  */
-int
+MHD_RESULT
 TALER_MHD_can_compress (struct MHD_Connection *connection)
 {
   const char *ae;
@@ -118,13 +118,13 @@ TALER_MHD_can_compress (struct MHD_Connection *connection)
  * @param[in,out] buf_size pointer to initial size of @a buf
  * @return #MHD_YES if @a buf was compressed
  */
-int
+MHD_RESULT
 TALER_MHD_body_compress (void **buf,
                          size_t *buf_size)
 {
   Bytef *cbuf;
   uLongf cbuf_size;
-  int ret;
+  MHD_RESULT ret;
 
   cbuf_size = compressBound (*buf_size);
   cbuf = malloc (cbuf_size);
@@ -193,7 +193,7 @@ TALER_MHD_make_json (const json_t *json)
  * @param response_code the http response code
  * @return MHD result code
  */
-int
+MHD_RESULT
 TALER_MHD_reply_json (struct MHD_Connection *connection,
                       const json_t *json,
                       unsigned int response_code)
@@ -201,7 +201,7 @@ TALER_MHD_reply_json (struct MHD_Connection *connection,
   struct MHD_Response *response;
   void *json_str;
   size_t json_len;
-  int is_compressed;
+  MHD_RESULT is_compressed;
 
   json_str = json_dumps (json,
                          JSON_INDENT (2));
@@ -253,7 +253,7 @@ TALER_MHD_reply_json (struct MHD_Connection *connection,
   }
 
   {
-    int ret;
+    MHD_RESULT ret;
 
     ret = MHD_queue_response (connection,
                               response_code,
@@ -271,7 +271,7 @@ TALER_MHD_reply_json (struct MHD_Connection *connection,
  * @param connection the MHD connection
  * @return MHD result code
  */
-int
+MHD_RESULT
 TALER_MHD_reply_cors_preflight (struct MHD_Connection *connection)
 {
   struct MHD_Response *response;
@@ -291,7 +291,7 @@ TALER_MHD_reply_cors_preflight (struct MHD_Connection 
*connection)
                                          "*"));
 
   {
-    int ret;
+    MHD_RESULT ret;
 
     ret = MHD_queue_response (connection,
                               MHD_HTTP_NO_CONTENT,
@@ -312,7 +312,7 @@ TALER_MHD_reply_cors_preflight (struct MHD_Connection 
*connection)
  * @param ... varargs
  * @return MHD result code
  */
-int
+MHD_RESULT
 TALER_MHD_reply_json_pack (struct MHD_Connection *connection,
                            unsigned int response_code,
                            const char *fmt,
@@ -344,7 +344,7 @@ TALER_MHD_reply_json_pack (struct MHD_Connection 
*connection,
   }
 
   {
-    int ret;
+    MHD_RESULT ret;
 
     ret = TALER_MHD_reply_json (connection,
                                 json,
@@ -426,7 +426,7 @@ TALER_MHD_make_error (enum TALER_ErrorCode ec,
  * @param hint human readable hint about the error
  * @return a MHD result code
  */
-int
+MHD_RESULT
 TALER_MHD_reply_with_error (struct MHD_Connection *connection,
                             unsigned int http_status,
                             enum TALER_ErrorCode ec,
@@ -446,7 +446,7 @@ TALER_MHD_reply_with_error (struct MHD_Connection 
*connection,
  * @param connection the MHD connection to use
  * @return a MHD result code
  */
-int
+MHD_RESULT
 TALER_MHD_reply_request_too_large (struct MHD_Connection *connection)
 {
   struct MHD_Response *response;
@@ -459,7 +459,7 @@ TALER_MHD_reply_request_too_large (struct MHD_Connection 
*connection)
   TALER_MHD_add_global_headers (response);
 
   {
-    int ret;
+    MHD_RESULT ret;
 
     ret = MHD_queue_response (connection,
                               MHD_HTTP_REQUEST_ENTITY_TOO_LARGE,
@@ -478,7 +478,7 @@ TALER_MHD_reply_request_too_large (struct MHD_Connection 
*connection)
  * @param url where to redirect for the sources
  * @return MHD result code
  */
-int
+MHD_RESULT
 TALER_MHD_reply_agpl (struct MHD_Connection *connection,
                       const char *url)
 {
@@ -510,7 +510,7 @@ TALER_MHD_reply_agpl (struct MHD_Connection *connection,
   }
 
   {
-    int ret;
+    MHD_RESULT ret;
 
     ret = MHD_queue_response (connection,
                               MHD_HTTP_FOUND,
@@ -532,7 +532,7 @@ TALER_MHD_reply_agpl (struct MHD_Connection *connection,
  * @param body_size number of bytes in @a body
  * @return MHD result code
  */
-int
+MHD_RESULT
 TALER_MHD_reply_static (struct MHD_Connection *connection,
                         unsigned int http_status,
                         const char *mime_type,
@@ -556,7 +556,7 @@ TALER_MHD_reply_static (struct MHD_Connection *connection,
                                            MHD_HTTP_HEADER_CONTENT_TYPE,
                                            mime_type));
   {
-    int ret;
+    MHD_RESULT ret;
 
     ret = MHD_queue_response (connection,
                               http_status,

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