merge /wire into /keys response

src/exchange/Makefile.am

@@ -184,7 +184,6 @@ taler_exchange_httpd_SOURCES = \
   taler-exchange-httpd_responses.c taler-exchange-httpd_responses.h \
   taler-exchange-httpd_terms.c taler-exchange-httpd_terms.h \
   taler-exchange-httpd_transfers_get.c taler-exchange-httpd_transfers_get.h \
-  taler-exchange-httpd_wire.c taler-exchange-httpd_wire.h \
   taler-exchange-httpd_withdraw.c taler-exchange-httpd_withdraw.h
 
 taler_exchange_httpd_LDADD = \

src/exchange/taler-exchange-httpd.c

@@ -70,7 +70,6 @@
 #include "taler-exchange-httpd_reserves_status.h"
 #include "taler-exchange-httpd_terms.h"
 #include "taler-exchange-httpd_transfers_get.h"
-#include "taler-exchange-httpd_wire.h"
 #include "taler-exchange-httpd_withdraw.h"
 #include "taler_exchangedb_lib.h"
 #include "taler_exchangedb_plugin.h"

src/exchange/taler-exchange-httpd_keys.c

@@ -388,6 +388,117 @@ struct SuspendedKeysRequests
   struct GNUNET_TIME_Absolute timeout;
 };
 
+
+/**
+ * Information we track about wire fees.
+ */
+struct WireFeeSet
+{
+
+  /**
+   * Kept in a DLL.
+   */
+  struct WireFeeSet *next;
+
+  /**
+   * Kept in a DLL.
+   */
+  struct WireFeeSet *prev;
+
+  /**
+   * Actual fees.
+   */
+  struct TALER_WireFeeSet fees;
+
+  /**
+   * Start date of fee validity (inclusive).
+   */
+  struct GNUNET_TIME_Timestamp start_date;
+
+  /**
+   * End date of fee validity (exclusive).
+   */
+  struct GNUNET_TIME_Timestamp end_date;
+
+  /**
+   * Wire method the fees apply to.
+   */
+  char *method;
+};
+
+
+/**
+ * State we keep per thread to cache the /wire response.
+ */
+struct WireStateHandle
+{
+  /**
+   * Cached reply for /wire response.
+   */
+  struct MHD_Response *wire_reply;
+
+  /**
+   * JSON reply for /wire response.
+   */
+  json_t *json_reply;
+
+  /**
+   * ETag for this response (if any).
+   */
+  char *etag;
+
+  /**
+   * head of DLL of wire fees.
+   */
+  struct WireFeeSet *wfs_head;
+
+  /**
+   * Tail of DLL of wire fees.
+   */
+  struct WireFeeSet *wfs_tail;
+
+  /**
+   * Earliest timestamp of all the wire methods when we have no more fees.
+   */
+  struct GNUNET_TIME_Absolute cache_expiration;
+
+  /**
+   * @e cache_expiration time, formatted.
+   */
+  char dat[128];
+
+  /**
+   * For which (global) wire_generation was this data structure created?
+   * Used to check when we are outdated and need to be re-generated.
+   */
+  uint64_t wire_generation;
+
+  /**
+   * HTTP status to return with this response.
+   */
+  unsigned int http_status;
+
+};
+
+
+/**
+ * Stores the latest generation of our wire response.
+ */
+static struct WireStateHandle *wire_state;
+
+/**
+ * Handler listening for wire updates by other exchange
+ * services.
+ */
+static struct GNUNET_DB_EventHandler *wire_eh;
+
+/**
+ * Counter incremented whenever we have a reason to re-build the #wire_state
+ * because something external changed.
+ */
+static uint64_t wire_generation;
+
+
 /**
  * Stores the latest generation of our key state.
  */
@@ -465,6 +576,543 @@ static struct TALER_SecurityModulePublicKeyP esign_sm_pub;
 static bool terminating;
 
 
+/**
+ * Free memory associated with @a wsh
+ *
+ * @param[in] wsh wire state to destroy
+ */
+static void
+destroy_wire_state (struct WireStateHandle *wsh)
+{
+  struct WireFeeSet *wfs;
+
+  while (NULL != (wfs = wsh->wfs_head))
+  {
+    GNUNET_CONTAINER_DLL_remove (wsh->wfs_head,
+                                 wsh->wfs_tail,
+                                 wfs);
+    GNUNET_free (wfs->method);
+    GNUNET_free (wfs);
+  }
+  MHD_destroy_response (wsh->wire_reply);
+  json_decref (wsh->json_reply);
+  GNUNET_free (wsh->etag);
+  GNUNET_free (wsh);
+}
+
+
+/**
+ * Function called whenever another exchange process has updated
+ * the wire data in the database.
+ *
+ * @param cls NULL
+ * @param extra unused
+ * @param extra_size number of bytes in @a extra unused
+ */
+static void
+wire_update_event_cb (void *cls,
+                      const void *extra,
+                      size_t extra_size)
+{
+  (void) cls;
+  (void) extra;
+  (void) extra_size;
+  GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+              "Received /wire update event\n");
+  TEH_check_invariants ();
+  wire_generation++;
+}
+
+
+enum GNUNET_GenericReturnValue
+TEH_wire_init ()
+{
+  struct GNUNET_DB_EventHeaderP es = {
+    .size = htons (sizeof (es)),
+    .type = htons (TALER_DBEVENT_EXCHANGE_KEYS_UPDATED),
+  };
+
+  wire_eh = TEH_plugin->event_listen (TEH_plugin->cls,
+                                      GNUNET_TIME_UNIT_FOREVER_REL,
+                                      &es,
+                                      &wire_update_event_cb,
+                                      NULL);
+  if (NULL == wire_eh)
+  {
+    GNUNET_break (0);
+    return GNUNET_SYSERR;
+  }
+  return GNUNET_OK;
+}
+
+
+void
+TEH_wire_done ()
+{
+  if (NULL != wire_state)
+  {
+    destroy_wire_state (wire_state);
+    wire_state = NULL;
+  }
+  if (NULL != wire_eh)
+  {
+    TEH_plugin->event_listen_cancel (TEH_plugin->cls,
+                                     wire_eh);
+    wire_eh = NULL;
+  }
+}
+
+
+/**
+ * Add information about a wire account to @a cls.
+ *
+ * @param cls a `json_t *` object to expand with wire account details
+ * @param payto_uri the exchange bank account URI to add
+ * @param conversion_url URL of a conversion service, NULL if there is no conversion
+ * @param debit_restrictions JSON array with debit restrictions on the account
+ * @param credit_restrictions JSON array with credit restrictions on the account
+ * @param master_sig master key signature affirming that this is a bank
+ *                   account of the exchange (of purpose #TALER_SIGNATURE_MASTER_WIRE_DETAILS)
+ */
+static void
+add_wire_account (void *cls,
+                  const char *payto_uri,
+                  const char *conversion_url,
+                  const json_t *debit_restrictions,
+                  const json_t *credit_restrictions,
+                  const struct TALER_MasterSignatureP *master_sig)
+{
+  json_t *a = cls;
+
+  if (0 !=
+      json_array_append_new (
+        a,
+        GNUNET_JSON_PACK (
+          GNUNET_JSON_pack_string ("payto_uri",
+                                   payto_uri),
+          GNUNET_JSON_pack_allow_null (
+            GNUNET_JSON_pack_string ("conversion_url",
+                                     conversion_url)),
+          GNUNET_JSON_pack_array_incref ("debit_restrictions",
+                                         (json_t *) debit_restrictions),
+          GNUNET_JSON_pack_array_incref ("credit_restrictions",
+                                         (json_t *) credit_restrictions),
+          GNUNET_JSON_pack_data_auto ("master_sig",
+                                      master_sig))))
+  {
+    GNUNET_break (0);   /* out of memory!? */
+    return;
+  }
+}
+
+
+/**
+ * Closure for #add_wire_fee().
+ */
+struct AddContext
+{
+  /**
+   * Wire method the fees are for.
+   */
+  char *wire_method;
+
+  /**
+   * Wire state we are building.
+   */
+  struct WireStateHandle *wsh;
+
+  /**
+   * Array to append the fee to.
+   */
+  json_t *a;
+
+  /**
+   * Context we hash "everything" we add into. This is used
+   * to compute the etag. Technically, we only hash the
+   * master_sigs, as they imply the rest.
+   */
+  struct GNUNET_HashContext *hc;
+
+  /**
+   * Set to the maximum end-date seen.
+   */
+  struct GNUNET_TIME_Absolute max_seen;
+};
+
+
+/**
+ * Add information about a wire account to @a cls.
+ *
+ * @param cls a `struct AddContext`
+ * @param fees the wire fees we charge
+ * @param start_date from when are these fees valid (start date)
+ * @param end_date until when are these fees valid (end date, exclusive)
+ * @param master_sig master key signature affirming that this is the correct
+ *                   fee (of purpose #TALER_SIGNATURE_MASTER_WIRE_FEES)
+ */
+static void
+add_wire_fee (void *cls,
+              const struct TALER_WireFeeSet *fees,
+              struct GNUNET_TIME_Timestamp start_date,
+              struct GNUNET_TIME_Timestamp end_date,
+              const struct TALER_MasterSignatureP *master_sig)
+{
+  struct AddContext *ac = cls;
+  struct WireFeeSet *wfs;
+
+  GNUNET_CRYPTO_hash_context_read (ac->hc,
+                                   master_sig,
+                                   sizeof (*master_sig));
+  ac->max_seen = GNUNET_TIME_absolute_max (ac->max_seen,
+                                           end_date.abs_time);
+  wfs = GNUNET_new (struct WireFeeSet);
+  wfs->start_date = start_date;
+  wfs->end_date = end_date;
+  wfs->fees = *fees;
+  wfs->method = GNUNET_strdup (ac->wire_method);
+  GNUNET_CONTAINER_DLL_insert (ac->wsh->wfs_head,
+                               ac->wsh->wfs_tail,
+                               wfs);
+  if (0 !=
+      json_array_append_new (
+        ac->a,
+        GNUNET_JSON_PACK (
+          TALER_JSON_pack_amount ("wire_fee",
+                                  &fees->wire),
+          TALER_JSON_pack_amount ("closing_fee",
+                                  &fees->closing),
+          GNUNET_JSON_pack_timestamp ("start_date",
+                                      start_date),
+          GNUNET_JSON_pack_timestamp ("end_date",
+                                      end_date),
+          GNUNET_JSON_pack_data_auto ("sig",
+                                      master_sig))))
+  {
+    GNUNET_break (0);   /* out of memory!? */
+    return;
+  }
+}
+
+
+/**
+ * Create the /wire response from our database state.
+ *
+ * @return NULL on error
+ */
+static struct WireStateHandle *
+build_wire_state (void)
+{
+  json_t *wire_accounts_array;
+  json_t *wire_fee_object;
+  uint64_t wg = wire_generation; /* must be obtained FIRST */
+  enum GNUNET_DB_QueryStatus qs;
+  struct WireStateHandle *wsh;
+  struct GNUNET_HashContext *hc;
+  json_t *wads;
+
+  wsh = GNUNET_new (struct WireStateHandle);
+  wsh->wire_generation = wg;
+  wire_accounts_array = json_array ();
+  GNUNET_assert (NULL != wire_accounts_array);
+  qs = TEH_plugin->get_wire_accounts (TEH_plugin->cls,
+                                      &add_wire_account,
+                                      wire_accounts_array);
+  if (0 > qs)
+  {
+    GNUNET_break (0);
+    json_decref (wire_accounts_array);
+    wsh->http_status = MHD_HTTP_INTERNAL_SERVER_ERROR;
+    wsh->wire_reply
+      = TALER_MHD_make_error (TALER_EC_GENERIC_DB_FETCH_FAILED,
+                              "get_wire_accounts");
+    return wsh;
+  }
+  if (0 == json_array_size (wire_accounts_array))
+  {
+    json_decref (wire_accounts_array);
+    wsh->http_status = MHD_HTTP_INTERNAL_SERVER_ERROR;
+    wsh->wire_reply
+      = TALER_MHD_make_error (TALER_EC_EXCHANGE_WIRE_NO_ACCOUNTS_CONFIGURED,
+                              NULL);
+    return wsh;
+  }
+  wire_fee_object = json_object ();
+  GNUNET_assert (NULL != wire_fee_object);
+  wsh->cache_expiration = GNUNET_TIME_UNIT_FOREVER_ABS;
+  hc = GNUNET_CRYPTO_hash_context_start ();
+  {
+    json_t *account;
+    size_t index;
+
+    json_array_foreach (wire_accounts_array, index, account) {
+      char *wire_method;
+      const char *payto_uri = json_string_value (json_object_get (account,
+                                                                  "payto_uri"));
+
+      GNUNET_assert (NULL != payto_uri);
+      wire_method = TALER_payto_get_method (payto_uri);
+      if (NULL == wire_method)
+      {
+        wsh->http_status = MHD_HTTP_INTERNAL_SERVER_ERROR;
+        wsh->wire_reply
+          = TALER_MHD_make_error (
+              TALER_EC_EXCHANGE_WIRE_INVALID_PAYTO_CONFIGURED,
+              payto_uri);
+        json_decref (wire_accounts_array);
+        json_decref (wire_fee_object);
+        GNUNET_CRYPTO_hash_context_abort (hc);
+        return wsh;
+      }
+      if (NULL == json_object_get (wire_fee_object,
+                                   wire_method))
+      {
+        struct AddContext ac = {
+          .wire_method = wire_method,
+          .wsh = wsh,
+          .a = json_array (),
+          .hc = hc
+        };
+
+        GNUNET_assert (NULL != ac.a);
+        qs = TEH_plugin->get_wire_fees (TEH_plugin->cls,
+                                        wire_method,
+                                        &add_wire_fee,
+                                        &ac);
+        if (0 > qs)
+        {
+          GNUNET_break (0);
+          json_decref (ac.a);
+          json_decref (wire_fee_object);
+          json_decref (wire_accounts_array);
+          GNUNET_free (wire_method);
+          wsh->http_status = MHD_HTTP_INTERNAL_SERVER_ERROR;
+          wsh->wire_reply
+            = TALER_MHD_make_error (TALER_EC_GENERIC_DB_FETCH_FAILED,
+                                    "get_wire_fees");
+          GNUNET_CRYPTO_hash_context_abort (hc);
+          return wsh;
+        }
+        if (0 == json_array_size (ac.a))
+        {
+          json_decref (ac.a);
+          json_decref (wire_accounts_array);
+          json_decref (wire_fee_object);
+          wsh->http_status = MHD_HTTP_INTERNAL_SERVER_ERROR;
+          wsh->wire_reply
+            = TALER_MHD_make_error (TALER_EC_EXCHANGE_WIRE_FEES_NOT_CONFIGURED,
+                                    wire_method);
+          GNUNET_free (wire_method);
+          GNUNET_CRYPTO_hash_context_abort (hc);
+          return wsh;
+        }
+        wsh->cache_expiration = GNUNET_TIME_absolute_min (ac.max_seen,
+                                                          wsh->cache_expiration);
+        GNUNET_assert (0 ==
+                       json_object_set_new (wire_fee_object,
+                                            wire_method,
+                                            ac.a));
+      }
+      GNUNET_free (wire_method);
+    }
+  }
+
+  wads = json_array (); /* #7271 */
+  GNUNET_assert (NULL != wads);
+  wsh->json_reply = GNUNET_JSON_PACK (
+    GNUNET_JSON_pack_array_incref ("accounts",
+                                   wire_accounts_array),
+    GNUNET_JSON_pack_array_incref ("wads",
+                                   wads),
+    GNUNET_JSON_pack_object_incref ("fees",
+                                    wire_fee_object));
+  wsh->wire_reply = TALER_MHD_MAKE_JSON_PACK (
+    GNUNET_JSON_pack_array_steal ("accounts",
+                                  wire_accounts_array),
+    GNUNET_JSON_pack_array_steal ("wads",
+                                  wads),
+    GNUNET_JSON_pack_object_steal ("fees",
+                                   wire_fee_object),
+    GNUNET_JSON_pack_data_auto ("master_public_key",
+                                &TEH_master_public_key));
+  {
+    struct GNUNET_TIME_Timestamp m;
+
+    m = GNUNET_TIME_absolute_to_timestamp (wsh->cache_expiration);
+    TALER_MHD_get_date_string (m.abs_time,
+                               wsh->dat);
+    GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+                "Setting 'Expires' header for '/wire' to '%s'\n",
+                wsh->dat);
+    GNUNET_break (MHD_YES ==
+                  MHD_add_response_header (wsh->wire_reply,
+                                           MHD_HTTP_HEADER_EXPIRES,
+                                           wsh->dat));
+  }
+  /* Set cache control headers: our response varies depending on these headers */
+  GNUNET_break (MHD_YES ==
+                MHD_add_response_header (wsh->wire_reply,
+                                         MHD_HTTP_HEADER_VARY,
+                                         MHD_HTTP_HEADER_ACCEPT_ENCODING));
+  /* Information is always public, revalidate after 1 day */
+  GNUNET_break (MHD_YES ==
+                MHD_add_response_header (wsh->wire_reply,
+                                         MHD_HTTP_HEADER_CACHE_CONTROL,
+                                         "public,max-age=86400"));
+
+  {
+    struct GNUNET_HashCode h;
+    char etag[sizeof (h) * 2];
+    char *end;
+
+    GNUNET_CRYPTO_hash_context_finish (hc,
+                                       &h);
+    end = GNUNET_STRINGS_data_to_string (&h,
+                                         sizeof (h),
+                                         etag,
+                                         sizeof (etag));
+    *end = '\0';
+    wsh->etag = GNUNET_strdup (etag);
+    GNUNET_break (MHD_YES ==
+                  MHD_add_response_header (wsh->wire_reply,
+                                           MHD_HTTP_HEADER_ETAG,
+                                           etag));
+  }
+  wsh->http_status = MHD_HTTP_OK;
+  return wsh;
+}
+
+
+void
+TEH_wire_update_state (void)
+{
+  struct GNUNET_DB_EventHeaderP es = {
+    .size = htons (sizeof (es)),
+    .type = htons (TALER_DBEVENT_EXCHANGE_WIRE_UPDATED),
+  };
+
+  TEH_plugin->event_notify (TEH_plugin->cls,
+                            &es,
+                            NULL,
+                            0);
+  wire_generation++;
+}
+
+
+/**
+ * Return the current key state for this thread.  Possibly
+ * re-builds the key state if we have reason to believe
+ * that something changed.
+ *
+ * @return NULL on error
+ */
+struct WireStateHandle *
+get_wire_state (void)
+{
+  struct WireStateHandle *old_wsh;
+
+  old_wsh = wire_state;
+  if ( (NULL == old_wsh) ||
+       (old_wsh->wire_generation < wire_generation) )
+  {
+    struct WireStateHandle *wsh;
+
+    TEH_check_invariants ();
+    wsh = build_wire_state ();
+    wire_state = wsh;
+    if (NULL != old_wsh)
+      destroy_wire_state (old_wsh);
+    TEH_check_invariants ();
+    return wsh;
+  }
+  return old_wsh;
+}
+
+
+MHD_RESULT
+TEH_handler_wire (struct TEH_RequestContext *rc,
+                  const char *const args[])
+{
+  struct WireStateHandle *wsh;
+
+  (void) args;
+  wsh = get_wire_state ();
+  if (NULL == wsh)
+    return TALER_MHD_reply_with_error (rc->connection,
+                                       MHD_HTTP_INTERNAL_SERVER_ERROR,
+                                       TALER_EC_EXCHANGE_GENERIC_BAD_CONFIGURATION,
+                                       NULL);
+  {
+    const char *etag;
+
+    etag = MHD_lookup_connection_value (rc->connection,
+                                        MHD_HEADER_KIND,
+                                        MHD_HTTP_HEADER_IF_NONE_MATCH);
+    if ( (NULL != etag) &&
+         (MHD_HTTP_OK == wsh->http_status) &&
+         (NULL != wsh->etag) &&
+         (0 == strcmp (etag,
+                       wsh->etag)) )
+    {
+      MHD_RESULT ret;
+      struct MHD_Response *resp;
+
+      resp = MHD_create_response_from_buffer (0,
+                                              NULL,
+                                              MHD_RESPMEM_PERSISTENT);
+      TALER_MHD_add_global_headers (resp);
+      GNUNET_break (MHD_YES ==
+                    MHD_add_response_header (resp,
+                                             MHD_HTTP_HEADER_EXPIRES,
+                                             wsh->dat));
+      GNUNET_break (MHD_YES ==
+                    MHD_add_response_header (resp,
+                                             MHD_HTTP_HEADER_ETAG,
+                                             wsh->etag));
+      ret = MHD_queue_response (rc->connection,
+                                MHD_HTTP_NOT_MODIFIED,
+                                resp);
+      GNUNET_break (MHD_YES == ret);
+      MHD_destroy_response (resp);
+      return ret;
+    }
+  }
+  return MHD_queue_response (rc->connection,
+                             wsh->http_status,
+                             wsh->wire_reply);
+}
+
+
+const struct TALER_WireFeeSet *
+TEH_wire_fees_by_time (
+  struct GNUNET_TIME_Timestamp ts,
+  const char *method)
+{
+  struct WireStateHandle *wsh = get_wire_state ();
+
+  for (struct WireFeeSet *wfs = wsh->wfs_head;
+       NULL != wfs;
+       wfs = wfs->next)
+  {
+    if (0 != strcmp (method,
+                     wfs->method))
+      continue;
+    if ( (GNUNET_TIME_timestamp_cmp (wfs->start_date,
+                                     >,
+                                     ts)) ||
+         (GNUNET_TIME_timestamp_cmp (ts,
+                                     >=,
+                                     wfs->end_date)) )
+      continue;
+    return &wfs->fees;
+  }
+  GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+              "No wire fees for method `%s' at %s configured\n",
+              method,
+              GNUNET_TIME_timestamp2s (ts));
+  return NULL;
+}
+
+
 /**
  * Function called to forcefully resume suspended keys requests.
  *
@@ -1673,6 +2321,7 @@ add_denom_key_cb (void *cls,
  */
 static enum GNUNET_GenericReturnValue
 setup_general_response_headers (struct TEH_KeyStateHandle *ksh,
+                                struct WireStateHandle *wsh,
                                 struct MHD_Response *response)
 {
   char dat[128];
@@ -1692,12 +2341,17 @@ setup_general_response_headers (struct TEH_KeyStateHandle *ksh,
   {
     struct GNUNET_TIME_Relative r;
     struct GNUNET_TIME_Absolute a;
+    struct GNUNET_TIME_Timestamp km;
     struct GNUNET_TIME_Timestamp m;
+    struct GNUNET_TIME_Timestamp we;
 
     r = GNUNET_TIME_relative_min (TEH_max_keys_caching,
                                   ksh->rekey_frequency);
     a = GNUNET_TIME_relative_to_absolute (r);
-    m = GNUNET_TIME_absolute_to_timestamp (a);
+    km = GNUNET_TIME_absolute_to_timestamp (a);
+    we = GNUNET_TIME_absolute_to_timestamp (wsh->cache_expiration);
+    m = GNUNET_TIME_timestamp_min (we,
+                                   km);
     TALER_MHD_get_date_string (m.abs_time,
                                dat);
     GNUNET_log (GNUNET_ERROR_TYPE_INFO,
@@ -1777,8 +2431,10 @@ create_krd (struct TEH_KeyStateHandle *ksh,
   struct TALER_ExchangeSignatureP exchange_sig;
   struct TALER_ExchangePublicKeyP grouped_exchange_pub;
   struct TALER_ExchangeSignatureP grouped_exchange_sig;
+  struct WireStateHandle *wsh;
   json_t *keys;
 
+  wsh = get_wire_state ();
   GNUNET_assert (! GNUNET_TIME_absolute_is_zero (
                    last_cherry_pick_date.abs_time));
   GNUNET_assert (NULL != signkeys);
@@ -1874,6 +2530,8 @@ create_krd (struct TEH_KeyStateHandle *ksh,
                                    recoup),
     GNUNET_JSON_pack_array_incref ("denoms",
                                    denoms),
+    GNUNET_JSON_pack_object_incref ("wire",
+                                    wsh->json_reply),
     GNUNET_JSON_pack_array_incref ("denominations",
                                    grouped_denominations),
     GNUNET_JSON_pack_array_incref ("auditors",
@@ -2010,6 +2668,7 @@ create_krd (struct TEH_KeyStateHandle *ksh,
     GNUNET_assert (NULL != krd.response_uncompressed);
     GNUNET_assert (GNUNET_OK ==
                    setup_general_response_headers (ksh,
+                                                   wsh,
                                                    krd.response_uncompressed));
     GNUNET_break (MHD_YES ==
                   MHD_add_response_header (krd.response_uncompressed,
@@ -2032,7 +2691,18 @@ create_krd (struct TEH_KeyStateHandle *ksh,
                                               "deflate")) );
     GNUNET_assert (GNUNET_OK ==
                    setup_general_response_headers (ksh,
+                                                   wsh,
                                                    krd.response_compressed));
+    /* Set cache control headers: our response varies depending on these headers */
+    GNUNET_break (MHD_YES ==
+                  MHD_add_response_header (wsh->wire_reply,
+                                           MHD_HTTP_HEADER_VARY,
+                                           MHD_HTTP_HEADER_ACCEPT_ENCODING));
+    /* Information is always public, revalidate after 1 day */
+    GNUNET_break (MHD_YES ==
+                  MHD_add_response_header (wsh->wire_reply,
+                                           MHD_HTTP_HEADER_CACHE_CONTROL,
+                                           "public,max-age=86400"));
     GNUNET_break (MHD_YES ==
                   MHD_add_response_header (krd.response_compressed,
                                            MHD_HTTP_HEADER_ETAG,
@@ -3195,7 +3865,9 @@ TEH_keys_get_handler (struct TEH_RequestContext *rc,
 {
   struct GNUNET_TIME_Timestamp last_issue_date;
   const char *etag;
+  struct WireStateHandle *wsh;
 
+  wsh = get_wire_state ();
   etag = MHD_lookup_connection_value (rc->connection,
                                       MHD_HEADER_KIND,
                                       MHD_HTTP_HEADER_IF_NONE_MATCH);
@@ -3293,6 +3965,7 @@ TEH_keys_get_handler (struct TEH_RequestContext *rc,
       TALER_MHD_add_global_headers (resp);
       GNUNET_break (GNUNET_OK ==
                     setup_general_response_headers (ksh,
+                                                    wsh,
                                                     resp));
       GNUNET_break (MHD_YES ==
                     MHD_add_response_header (resp,

src/exchange/taler-exchange-httpd_keys.h

@@ -154,6 +154,60 @@ struct TEH_KeyStateHandle;
 void
 TEH_check_invariants (void);
 
+/**
+ * Clean up wire subsystem.
+ */
+void
+TEH_wire_done (void);
+
+
+/**
+ * Look up wire fee structure by @a ts.
+ *
+ * @param ts timestamp to lookup wire fees at
+ * @param method wire method to lookup fees for
+ * @return the wire fee details, or
+ *         NULL if none are configured for @a ts and @a method
+ */
+const struct TALER_WireFeeSet *
+TEH_wire_fees_by_time (
+  struct GNUNET_TIME_Timestamp ts,
+  const char *method);
+
+
+/**
+ * Initialize wire subsystem.
+ *
+ * @return #GNUNET_OK on success
+ */
+enum GNUNET_GenericReturnValue
+TEH_wire_init (void);
+
+
+/**
+ * Something changed in the database. Rebuild the wire replies.  This function
+ * should be called if the exchange learns about a new signature from our
+ * master key.
+ *
+ * (We do not do so immediately, but merely signal to all threads that they
+ * need to rebuild their wire state upon the next call to
+ * #TEH_handler_wire()).
+ */
+void
+TEH_wire_update_state (void);
+
+
+/**
+ * Handle a "/wire" request.
+ *
+ * @param rc request context
+ * @param args array of additional options (must be empty for this function)
+ * @return MHD result code
+ */
+MHD_RESULT
+TEH_handler_wire (struct TEH_RequestContext *rc,
+                  const char *const args[]);
+
 
 /**
  * Return the current key state for this thread.  Possibly re-builds the key

src/exchange/taler-exchange-httpd_management_wire_disable.c

@@ -28,7 +28,7 @@
 #include "taler_mhd_lib.h"
 #include "taler-exchange-httpd_management.h"
 #include "taler-exchange-httpd_responses.h"
-#include "taler-exchange-httpd_wire.h"
+#include "taler-exchange-httpd_keys.h"
 
 
 /**

src/exchange/taler-exchange-httpd_management_wire_enable.c

@@ -29,7 +29,7 @@
 #include "taler_signatures.h"
 #include "taler-exchange-httpd_management.h"
 #include "taler-exchange-httpd_responses.h"
-#include "taler-exchange-httpd_wire.h"
+#include "taler-exchange-httpd_keys.h"
 
 
 /**

src/exchange/taler-exchange-httpd_management_wire_fees.c

@@ -29,7 +29,7 @@
 #include "taler_signatures.h"
 #include "taler-exchange-httpd_management.h"
 #include "taler-exchange-httpd_responses.h"
-#include "taler-exchange-httpd_wire.h"
+#include "taler-exchange-httpd_keys.h"
 
 
 /**

src/exchange/taler-exchange-httpd_purses_merge.c

@@ -34,7 +34,6 @@
 #include "taler-exchange-httpd_responses.h"
 #include "taler_exchangedb_lib.h"
 #include "taler-exchange-httpd_keys.h"
-#include "taler-exchange-httpd_wire.h"
 
 
 /**

src/exchange/taler-exchange-httpd_reserves_close.c

@@ -27,7 +27,7 @@
 #include "taler_mhd_lib.h"
 #include "taler_json_lib.h"
 #include "taler_dbevents.h"
-#include "taler-exchange-httpd_wire.h"
+#include "taler-exchange-httpd_keys.h"
 #include "taler-exchange-httpd_reserves_close.h"
 #include "taler-exchange-httpd_responses.h"
 

src/exchange/taler-exchange-httpd_wire.c

@@ -1,663 +0,0 @@
-/*
-  This file is part of TALER
-  Copyright (C) 2015-2023 Taler Systems SA
-
-  TALER is free software; you can redistribute it and/or modify it under the
-  terms of the GNU Affero General Public License as published by the Free Software
-  Foundation; either version 3, or (at your option) any later version.
-
-  TALER is distributed in the hope that it will be useful, but WITHOUT ANY
-  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
-  A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more details.
-
-  You should have received a copy of the GNU Affero General Public License along with
-  TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
-*/
-/**
- * @file taler-exchange-httpd_wire.c
- * @brief Handle /wire requests
- * @author Christian Grothoff
- */
-#include "platform.h"
-#include <gnunet/gnunet_json_lib.h>
-#include "taler_dbevents.h"
-#include "taler-exchange-httpd_responses.h"
-#include "taler-exchange-httpd_keys.h"
-#include "taler-exchange-httpd_wire.h"
-#include "taler_json_lib.h"
-#include "taler_mhd_lib.h"
-#include <jansson.h>
-
-/**
- * Information we track about wire fees.
- */
-struct WireFeeSet
-{
-
-  /**
-   * Kept in a DLL.
-   */
-  struct WireFeeSet *next;
-
-  /**
-   * Kept in a DLL.
-   */
-  struct WireFeeSet *prev;
-
-  /**
-   * Actual fees.
-   */
-  struct TALER_WireFeeSet fees;
-
-  /**
-   * Start date of fee validity (inclusive).
-   */
-  struct GNUNET_TIME_Timestamp start_date;
-
-  /**
-   * End date of fee validity (exclusive).
-   */
-  struct GNUNET_TIME_Timestamp end_date;
-
-  /**
-   * Wire method the fees apply to.
-   */
-  char *method;
-};
-
-
-/**
- * State we keep per thread to cache the /wire response.
- */
-struct WireStateHandle
-{
-  /**
-   * Cached reply for /wire response.
-   */
-  struct MHD_Response *wire_reply;
-
-  /**
-   * ETag for this response (if any).
-   */
-  char *etag;
-
-  /**
-   * head of DLL of wire fees.
-   */
-  struct WireFeeSet *wfs_head;
-
-  /**
-   * Tail of DLL of wire fees.
-   */
-  struct WireFeeSet *wfs_tail;
-
-  /**
-   * Earliest timestamp of all the wire methods when we have no more fees.
-   */
-  struct GNUNET_TIME_Absolute cache_expiration;
-
-  /**
-   * @e cache_expiration time, formatted.
-   */
-  char dat[128];
-
-  /**
-   * For which (global) wire_generation was this data structure created?
-   * Used to check when we are outdated and need to be re-generated.
-   */
-  uint64_t wire_generation;
-
-  /**
-   * HTTP status to return with this response.
-   */
-  unsigned int http_status;
-
-};
-
-
-/**
- * Stores the latest generation of our wire response.
- */
-static struct WireStateHandle *wire_state;
-
-/**
- * Handler listening for wire updates by other exchange
- * services.
- */
-static struct GNUNET_DB_EventHandler *wire_eh;
-
-/**
- * Counter incremented whenever we have a reason to re-build the #wire_state
- * because something external changed.
- */
-static uint64_t wire_generation;
-
-
-/**
- * Free memory associated with @a wsh
- *
- * @param[in] wsh wire state to destroy
- */
-static void
-destroy_wire_state (struct WireStateHandle *wsh)
-{
-  struct WireFeeSet *wfs;
-
-  while (NULL != (wfs = wsh->wfs_head))
-  {
-    GNUNET_CONTAINER_DLL_remove (wsh->wfs_head,
-                                 wsh->wfs_tail,
-                                 wfs);
-    GNUNET_free (wfs->method);
-    GNUNET_free (wfs);
-  }
-  MHD_destroy_response (wsh->wire_reply);
-  GNUNET_free (wsh->etag);
-  GNUNET_free (wsh);
-}
-
-
-/**
- * Function called whenever another exchange process has updated
- * the wire data in the database.
- *
- * @param cls NULL
- * @param extra unused
- * @param extra_size number of bytes in @a extra unused
- */
-static void
-wire_update_event_cb (void *cls,
-                      const void *extra,
-                      size_t extra_size)
-{
-  (void) cls;
-  (void) extra;
-  (void) extra_size;
-  GNUNET_log (GNUNET_ERROR_TYPE_INFO,
-              "Received /wire update event\n");
-  TEH_check_invariants ();
-  wire_generation++;
-}
-
-
-enum GNUNET_GenericReturnValue
-TEH_wire_init ()
-{
-  struct GNUNET_DB_EventHeaderP es = {
-    .size = htons (sizeof (es)),
-    .type = htons (TALER_DBEVENT_EXCHANGE_KEYS_UPDATED),
-  };
-
-  wire_eh = TEH_plugin->event_listen (TEH_plugin->cls,
-                                      GNUNET_TIME_UNIT_FOREVER_REL,
-                                      &es,
-                                      &wire_update_event_cb,
-                                      NULL);
-  if (NULL == wire_eh)
-  {
-    GNUNET_break (0);
-    return GNUNET_SYSERR;
-  }
-  return GNUNET_OK;
-}
-
-
-void
-TEH_wire_done ()
-{
-  if (NULL != wire_state)
-  {
-    destroy_wire_state (wire_state);
-    wire_state = NULL;
-  }
-  if (NULL != wire_eh)
-  {
-    TEH_plugin->event_listen_cancel (TEH_plugin->cls,
-                                     wire_eh);
-    wire_eh = NULL;
-  }
-}
-
-
-/**
- * Add information about a wire account to @a cls.
- *
- * @param cls a `json_t *` object to expand with wire account details
- * @param payto_uri the exchange bank account URI to add
- * @param conversion_url URL of a conversion service, NULL if there is no conversion
- * @param debit_restrictions JSON array with debit restrictions on the account
- * @param credit_restrictions JSON array with credit restrictions on the account
- * @param master_sig master key signature affirming that this is a bank
- *                   account of the exchange (of purpose #TALER_SIGNATURE_MASTER_WIRE_DETAILS)
- */
-static void
-add_wire_account (void *cls,
-                  const char *payto_uri,
-                  const char *conversion_url,
-                  const json_t *debit_restrictions,
-                  const json_t *credit_restrictions,
-                  const struct TALER_MasterSignatureP *master_sig)
-{
-  json_t *a = cls;
-
-  if (0 !=
-      json_array_append_new (
-        a,
-        GNUNET_JSON_PACK (
-          GNUNET_JSON_pack_string ("payto_uri",
-                                   payto_uri),
-          GNUNET_JSON_pack_allow_null (
-            GNUNET_JSON_pack_string ("conversion_url",
-                                     conversion_url)),
-          GNUNET_JSON_pack_array_incref ("debit_restrictions",
-                                         (json_t *) debit_restrictions),
-          GNUNET_JSON_pack_array_incref ("credit_restrictions",
-                                         (json_t *) credit_restrictions),
-          GNUNET_JSON_pack_data_auto ("master_sig",
-                                      master_sig))))
-  {
-    GNUNET_break (0);   /* out of memory!? */
-    return;
-  }
-}
-
-
-/**
- * Closure for #add_wire_fee().
- */
-struct AddContext
-{
-  /**
-   * Wire method the fees are for.
-   */
-  char *wire_method;
-
-  /**
-   * Wire state we are building.
-   */
-  struct WireStateHandle *wsh;
-
-  /**
-   * Array to append the fee to.
-   */
-  json_t *a;
-
-  /**
-   * Context we hash "everything" we add into. This is used
-   * to compute the etag. Technically, we only hash the
-   * master_sigs, as they imply the rest.
-   */
-  struct GNUNET_HashContext *hc;
-
-  /**
-   * Set to the maximum end-date seen.
-   */
-  struct GNUNET_TIME_Absolute max_seen;
-};
-
-
-/**
- * Add information about a wire account to @a cls.
- *
- * @param cls a `struct AddContext`
- * @param fees the wire fees we charge
- * @param start_date from when are these fees valid (start date)
- * @param end_date until when are these fees valid (end date, exclusive)
- * @param master_sig master key signature affirming that this is the correct
- *                   fee (of purpose #TALER_SIGNATURE_MASTER_WIRE_FEES)
- */
-static void
-add_wire_fee (void *cls,
-              const struct TALER_WireFeeSet *fees,
-              struct GNUNET_TIME_Timestamp start_date,
-              struct GNUNET_TIME_Timestamp end_date,
-              const struct TALER_MasterSignatureP *master_sig)
-{
-  struct AddContext *ac = cls;
-  struct WireFeeSet *wfs;
-
-  GNUNET_CRYPTO_hash_context_read (ac->hc,
-                                   master_sig,
-                                   sizeof (*master_sig));
-  ac->max_seen = GNUNET_TIME_absolute_max (ac->max_seen,
-                                           end_date.abs_time);
-  wfs = GNUNET_new (struct WireFeeSet);
-  wfs->start_date = start_date;
-  wfs->end_date = end_date;
-  wfs->fees = *fees;
-  wfs->method = GNUNET_strdup (ac->wire_method);
-  GNUNET_CONTAINER_DLL_insert (ac->wsh->wfs_head,
-                               ac->wsh->wfs_tail,
-                               wfs);
-  if (0 !=
-      json_array_append_new (
-        ac->a,
-        GNUNET_JSON_PACK (
-          TALER_JSON_pack_amount ("wire_fee",
-                                  &fees->wire),
-          TALER_JSON_pack_amount ("closing_fee",
-                                  &fees->closing),
-          GNUNET_JSON_pack_timestamp ("start_date",
-                                      start_date),
-          GNUNET_JSON_pack_timestamp ("end_date",
-                                      end_date),
-          GNUNET_JSON_pack_data_auto ("sig",
-                                      master_sig))))
-  {
-    GNUNET_break (0);   /* out of memory!? */
-    return;
-  }
-}
-
-
-/**
- * Create the /wire response from our database state.
- *
- * @return NULL on error
- */
-static struct WireStateHandle *
-build_wire_state (void)
-{
-  json_t *wire_accounts_array;
-  json_t *wire_fee_object;
-  uint64_t wg = wire_generation; /* must be obtained FIRST */
-  enum GNUNET_DB_QueryStatus qs;
-  struct WireStateHandle *wsh;
-  struct GNUNET_HashContext *hc;
-
-  wsh = GNUNET_new (struct WireStateHandle);
-  wsh->wire_generation = wg;
-  wire_accounts_array = json_array ();
-  GNUNET_assert (NULL != wire_accounts_array);
-  qs = TEH_plugin->get_wire_accounts (TEH_plugin->cls,
-                                      &add_wire_account,
-                                      wire_accounts_array);
-  if (0 > qs)
-  {
-    GNUNET_break (0);
-    json_decref (wire_accounts_array);
-    wsh->http_status = MHD_HTTP_INTERNAL_SERVER_ERROR;
-    wsh->wire_reply
-      = TALER_MHD_make_error (TALER_EC_GENERIC_DB_FETCH_FAILED,
-                              "get_wire_accounts");
-    return wsh;
-  }
-  if (0 == json_array_size (wire_accounts_array))
-  {
-    json_decref (wire_accounts_array);
-    wsh->http_status = MHD_HTTP_INTERNAL_SERVER_ERROR;
-    wsh->wire_reply
-      = TALER_MHD_make_error (TALER_EC_EXCHANGE_WIRE_NO_ACCOUNTS_CONFIGURED,
-                              NULL);
-    return wsh;
-  }
-  wire_fee_object = json_object ();
-  GNUNET_assert (NULL != wire_fee_object);
-  wsh->cache_expiration = GNUNET_TIME_UNIT_FOREVER_ABS;
-  hc = GNUNET_CRYPTO_hash_context_start ();
-  {
-    json_t *account;
-    size_t index;
-
-    json_array_foreach (wire_accounts_array, index, account) {
-      char *wire_method;
-      const char *payto_uri = json_string_value (json_object_get (account,
-                                                                  "payto_uri"));
-
-      GNUNET_assert (NULL != payto_uri);
-      wire_method = TALER_payto_get_method (payto_uri);
-      if (NULL == wire_method)
-      {
-        wsh->http_status = MHD_HTTP_INTERNAL_SERVER_ERROR;
-        wsh->wire_reply
-          = TALER_MHD_make_error (
-              TALER_EC_EXCHANGE_WIRE_INVALID_PAYTO_CONFIGURED,
-              payto_uri);
-        json_decref (wire_accounts_array);
-        json_decref (wire_fee_object);
-        GNUNET_CRYPTO_hash_context_abort (hc);
-        return wsh;
-      }
-      if (NULL == json_object_get (wire_fee_object,
-                                   wire_method))
-      {
-        struct AddContext ac = {
-          .wire_method = wire_method,
-          .wsh = wsh,
-          .a = json_array (),
-          .hc = hc
-        };
-
-        GNUNET_assert (NULL != ac.a);
-        qs = TEH_plugin->get_wire_fees (TEH_plugin->cls,
-                                        wire_method,
-                                        &add_wire_fee,
-                                        &ac);
-        if (0 > qs)
-        {
-          GNUNET_break (0);
-          json_decref (ac.a);
-          json_decref (wire_fee_object);
-          json_decref (wire_accounts_array);
-          GNUNET_free (wire_method);
-          wsh->http_status = MHD_HTTP_INTERNAL_SERVER_ERROR;
-          wsh->wire_reply
-            = TALER_MHD_make_error (TALER_EC_GENERIC_DB_FETCH_FAILED,
-                                    "get_wire_fees");
-          GNUNET_CRYPTO_hash_context_abort (hc);
-          return wsh;
-        }
-        if (0 == json_array_size (ac.a))
-        {
-          json_decref (ac.a);
-          json_decref (wire_accounts_array);
-          json_decref (wire_fee_object);
-          wsh->http_status = MHD_HTTP_INTERNAL_SERVER_ERROR;
-          wsh->wire_reply
-            = TALER_MHD_make_error (TALER_EC_EXCHANGE_WIRE_FEES_NOT_CONFIGURED,
-                                    wire_method);
-          GNUNET_free (wire_method);
-          GNUNET_CRYPTO_hash_context_abort (hc);
-          return wsh;
-        }
-        wsh->cache_expiration = GNUNET_TIME_absolute_min (ac.max_seen,
-                                                          wsh->cache_expiration);
-        GNUNET_assert (0 ==
-                       json_object_set_new (wire_fee_object,
-                                            wire_method,
-                                            ac.a));
-      }
-      GNUNET_free (wire_method);
-    }
-  }
-
-
-  wsh->wire_reply = TALER_MHD_MAKE_JSON_PACK (
-    GNUNET_JSON_pack_array_steal ("accounts",
-                                  wire_accounts_array),
-    GNUNET_JSON_pack_array_steal ("wads", /* #7271 */
-                                  json_array ()),
-    GNUNET_JSON_pack_object_steal ("fees",
-                                   wire_fee_object),
-    GNUNET_JSON_pack_data_auto ("master_public_key",
-                                &TEH_master_public_key));
-  {
-    struct GNUNET_TIME_Timestamp m;
-
-    m = GNUNET_TIME_absolute_to_timestamp (wsh->cache_expiration);
-    TALER_MHD_get_date_string (m.abs_time,
-                               wsh->dat);
-    GNUNET_log (GNUNET_ERROR_TYPE_INFO,
-                "Setting 'Expires' header for '/wire' to '%s'\n",
-                wsh->dat);
-    GNUNET_break (MHD_YES ==
-                  MHD_add_response_header (wsh->wire_reply,
-                                           MHD_HTTP_HEADER_EXPIRES,
-                                           wsh->dat));
-  }
-  /* Set cache control headers: our response varies depending on these headers */
-  GNUNET_break (MHD_YES ==
-                MHD_add_response_header (wsh->wire_reply,
-                                         MHD_HTTP_HEADER_VARY,
-                                         MHD_HTTP_HEADER_ACCEPT_ENCODING));
-  /* Information is always public, revalidate after 1 day */
-  GNUNET_break (MHD_YES ==
-                MHD_add_response_header (wsh->wire_reply,
-                                         MHD_HTTP_HEADER_CACHE_CONTROL,
-                                         "public,max-age=86400"));
-
-  {
-    struct GNUNET_HashCode h;
-    char etag[sizeof (h) * 2];
-    char *end;
-
-    GNUNET_CRYPTO_hash_context_finish (hc,
-                                       &h);
-    end = GNUNET_STRINGS_data_to_string (&h,
-                                         sizeof (h),
-                                         etag,
-                                         sizeof (etag));
-    *end = '\0';
-    wsh->etag = GNUNET_strdup (etag);
-    GNUNET_break (MHD_YES ==
-                  MHD_add_response_header (wsh->wire_reply,
-                                           MHD_HTTP_HEADER_ETAG,
-                                           etag));
-  }
-  wsh->http_status = MHD_HTTP_OK;
-  return wsh;
-}
-
-
-void
-TEH_wire_update_state (void)
-{
-  struct GNUNET_DB_EventHeaderP es = {
-    .size = htons (sizeof (es)),
-    .type = htons (TALER_DBEVENT_EXCHANGE_WIRE_UPDATED),
-  };
-
-  TEH_plugin->event_notify (TEH_plugin->cls,
-                            &es,
-                            NULL,
-                            0);
-  wire_generation++;
-}
-
-
-/**
- * Return the current key state for this thread.  Possibly
- * re-builds the key state if we have reason to believe
- * that something changed.
- *
- * @return NULL on error
- */
-struct WireStateHandle *
-get_wire_state (void)
-{
-  struct WireStateHandle *old_wsh;
-
-  old_wsh = wire_state;
-  if ( (NULL == old_wsh) ||
-       (old_wsh->wire_generation < wire_generation) )
-  {
-    struct WireStateHandle *wsh;
-
-    TEH_check_invariants ();
-    wsh = build_wire_state ();
-    wire_state = wsh;
-    if (NULL != old_wsh)
-      destroy_wire_state (old_wsh);
-    TEH_check_invariants ();
-    return wsh;
-  }
-  return old_wsh;
-}
-
-
-MHD_RESULT
-TEH_handler_wire (struct TEH_RequestContext *rc,
-                  const char *const args[])
-{
-  struct WireStateHandle *wsh;
-
-  (void) args;
-  wsh = get_wire_state ();
-  if (NULL == wsh)
-    return TALER_MHD_reply_with_error (rc->connection,
-                                       MHD_HTTP_INTERNAL_SERVER_ERROR,
-                                       TALER_EC_EXCHANGE_GENERIC_BAD_CONFIGURATION,
-                                       NULL);
-  {
-    const char *etag;
-
-    etag = MHD_lookup_connection_value (rc->connection,
-                                        MHD_HEADER_KIND,
-                                        MHD_HTTP_HEADER_IF_NONE_MATCH);
-    if ( (NULL != etag) &&
-         (MHD_HTTP_OK == wsh->http_status) &&
-         (NULL != wsh->etag) &&
-         (0 == strcmp (etag,
-                       wsh->etag)) )
-    {
-      MHD_RESULT ret;
-      struct MHD_Response *resp;
-
-      resp = MHD_create_response_from_buffer (0,
-                                              NULL,
-                                              MHD_RESPMEM_PERSISTENT);
-      TALER_MHD_add_global_headers (resp);
-      GNUNET_break (MHD_YES ==
-                    MHD_add_response_header (resp,
-                                             MHD_HTTP_HEADER_EXPIRES,
-                                             wsh->dat));
-      GNUNET_break (MHD_YES ==
-                    MHD_add_response_header (resp,
-                                             MHD_HTTP_HEADER_ETAG,
-                                             wsh->etag));
-      ret = MHD_queue_response (rc->connection,
-                                MHD_HTTP_NOT_MODIFIED,
-                                resp);
-      GNUNET_break (MHD_YES == ret);
-      MHD_destroy_response (resp);
-      return ret;
-    }
-  }
-  return MHD_queue_response (rc->connection,
-                             wsh->http_status,
-                             wsh->wire_reply);
-}
-
-
-const struct TALER_WireFeeSet *
-TEH_wire_fees_by_time (
-  struct GNUNET_TIME_Timestamp ts,
-  const char *method)
-{
-  struct WireStateHandle *wsh = get_wire_state ();
-
-  for (struct WireFeeSet *wfs = wsh->wfs_head;
-       NULL != wfs;
-       wfs = wfs->next)
-  {
-    if (0 != strcmp (method,
-                     wfs->method))
-      continue;
-    if ( (GNUNET_TIME_timestamp_cmp (wfs->start_date,
-                                     >,
-                                     ts)) ||
-         (GNUNET_TIME_timestamp_cmp (ts,
-                                     >=,
-                                     wfs->end_date)) )
-      continue;
-    return &wfs->fees;
-  }
-  GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
-              "No wire fees for method `%s' at %s configured\n",
-              method,
-              GNUNET_TIME_timestamp2s (ts));
-  return NULL;
-}
-
-
-/* end of taler-exchange-httpd_wire.c */

src/exchange/taler-exchange-httpd_wire.h

@@ -1,84 +0,0 @@
-/*
-  This file is part of TALER
-  Copyright (C) 2014--2021 Taler Systems SA
-
-  TALER is free software; you can redistribute it and/or modify it under the
-  terms of the GNU Affero General Public License as published by the Free Software
-  Foundation; either version 3, or (at your option) any later version.
-
-  TALER is distributed in the hope that it will be useful, but WITHOUT ANY
-  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
-  A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more details.
-
-  You should have received a copy of the GNU Affero General Public License along with
-  TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
-*/
-/**
- * @file taler-exchange-httpd_wire.h
- * @brief Handle /wire requests
- * @author Christian Grothoff
- */
-#ifndef TALER_EXCHANGE_HTTPD_WIRE_H
-#define TALER_EXCHANGE_HTTPD_WIRE_H
-
-#include <gnunet/gnunet_util_lib.h>
-#include <microhttpd.h>
-#include "taler-exchange-httpd.h"
-
-
-/**
- * Clean up wire subsystem.
- */
-void
-TEH_wire_done (void);
-
-
-/**
- * Look up wire fee structure by @a ts.
- *
- * @param ts timestamp to lookup wire fees at
- * @param method wire method to lookup fees for
- * @return the wire fee details, or
- *         NULL if none are configured for @a ts and @a method
- */
-const struct TALER_WireFeeSet *
-TEH_wire_fees_by_time (
-  struct GNUNET_TIME_Timestamp ts,
-  const char *method);
-
-
-/**
- * Initialize wire subsystem.
- *
- * @return #GNUNET_OK on success
- */
-enum GNUNET_GenericReturnValue
-TEH_wire_init (void);
-
-
-/**
- * Something changed in the database. Rebuild the wire replies.  This function
- * should be called if the exchange learns about a new signature from our
- * master key.
- *
- * (We do not do so immediately, but merely signal to all threads that they
- * need to rebuild their wire state upon the next call to
- * #TEH_handler_wire()).
- */
-void
-TEH_wire_update_state (void);
-
-
-/**
- * Handle a "/wire" request.
- *
- * @param rc request context
- * @param args array of additional options (must be empty for this function)
- * @return MHD result code
- */
-MHD_RESULT
-TEH_handler_wire (struct TEH_RequestContext *rc,
-                  const char *const args[]);
-
-
-#endif