merchant

Merchant backend to process payments, run by merchants
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insert_unclaim_signature.c (3878B)

      1 /*
      2    This file is part of TALER
      3    Copyright (C) 2026 Taler Systems SA
      4 
      5    TALER is free software; you can redistribute it and/or modify it under the
      6    terms of the GNU General Public License as published by the Free Software
      7    Foundation; either version 3, or (at your option) any later version.
      8 
      9    TALER is distributed in the hope that it will be useful, but WITHOUT ANY
     10    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
     11    A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
     12 
     13    You should have received a copy of the GNU General Public License along with
     14    TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
     15  */
     16 /**
     17  * @file src/backenddb/insert_unclaim_signature.c
     18  * @brief Implementation of the insert_unclaim_signature function for Postgres
     19  * @author Christian Grothoff
     20  */
     21 #include "platform.h"
     22 #include <taler/taler_dbevents.h>
     23 #include <taler/taler_pq_lib.h>
     24 #include "merchant-database/insert_unclaim_signature.h"
     25 #include "helper.h"
     26 
     27 /**
     28  * Compute the notification code for the given
     29  * @a order_id and @a merchant_pub.
     30  *
     31  * @param order_id order to notify for
     32  * @param merchant_pub merchant to notify for
     33  * @return notification code, to be freed by caller
     34  */
     35 static char *
     36 get_notify_str (const char *order_id,
     37                 const struct TALER_MerchantPublicKeyP *merchant_pub)
     38 {
     39   struct TMH_OrderPayEventP pay_eh = {
     40     .header.size = htons (sizeof (pay_eh)),
     41     .header.type = htons (TALER_DBEVENT_MERCHANT_ORDER_STATUS_CHANGED),
     42     .merchant_pub = *merchant_pub
     43   };
     44 
     45   GNUNET_log (GNUNET_ERROR_TYPE_INFO,
     46               "Notifying clients about status change of order %s\n",
     47               order_id);
     48   GNUNET_CRYPTO_hash (order_id,
     49                       strlen (order_id),
     50                       &pay_eh.h_order_id);
     51   return GNUNET_PQ_get_event_notify_channel (&pay_eh.header);
     52 }
     53 
     54 
     55 enum GNUNET_DB_QueryStatus
     56 TALER_MERCHANTDB_insert_unclaim_signature (
     57   struct TALER_MERCHANTDB_PostgresContext *pg,
     58   const char *instance_id,
     59   const char *order_id,
     60   const struct GNUNET_CRYPTO_EddsaPublicKey *nonce,
     61   const struct GNUNET_HashCode *h_contract,
     62   const struct GNUNET_CRYPTO_EddsaSignature *nsig)
     63 {
     64   char nonce_str[sizeof (*nonce) * 2];
     65   char *end;
     66   char *notify_str = get_notify_str (order_id,
     67                                      &pg->current_merchant_pub);
     68   struct GNUNET_PQ_QueryParam params[] = {
     69     GNUNET_PQ_query_param_string (order_id),
     70     GNUNET_PQ_query_param_string (nonce_str),
     71     GNUNET_PQ_query_param_string (notify_str),
     72     GNUNET_PQ_query_param_auto_from_type (h_contract),
     73     GNUNET_PQ_query_param_auto_from_type (nsig),
     74     GNUNET_PQ_query_param_end
     75   };
     76   bool found;
     77   struct GNUNET_PQ_ResultSpec rs[] = {
     78     GNUNET_PQ_result_spec_bool ("out_found",
     79                                 &found),
     80     GNUNET_PQ_result_spec_end
     81   };
     82   enum GNUNET_DB_QueryStatus qs;
     83 
     84   GNUNET_assert (NULL != pg->current_merchant_id);
     85   GNUNET_assert (0 == strcmp (instance_id,
     86                               pg->current_merchant_id));
     87   check_connection (pg);
     88   end = GNUNET_STRINGS_data_to_string (nonce,
     89                                        sizeof (*nonce),
     90                                        nonce_str,
     91                                        sizeof (nonce_str));
     92   GNUNET_assert (NULL != end);
     93   *end = '\0';
     94   TMH_PQ_prepare_anon (pg,
     95                        "SELECT"
     96                        "  out_found"
     97                        "  FROM merchant_do_insert_unclaim_signature"
     98                        "($1, $2, $3, $4, $5);");
     99   qs = GNUNET_PQ_eval_prepared_singleton_select (
    100     pg->conn,
    101     "",
    102     params,
    103     rs);
    104   GNUNET_free (notify_str);
    105   if (qs <= 0)
    106     return qs;
    107   /* FIXME: not a precise set of possible errors... (see stored proc!) */
    108   return found
    109     ? GNUNET_DB_STATUS_SUCCESS_ONE_RESULT
    110     : GNUNET_DB_STATUS_SUCCESS_NO_RESULTS;
    111 }