Line data    Source code

       1             : /*
       2             :    This file is part of TALER
       3             :    Copyright (C) 2025 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 backenddb/pg_select_order_blinded_sigs.c
      18             :  * @brief Implementation of the select blinded sigs by order_id function for Postgres
      19             :  * @author Bohdan Potuzhnyi
      20             :  */
      21             : #include "platform.h"
      22             : #include <taler/taler_error_codes.h>
      23             : #include <taler/taler_dbevents.h>
      24             : #include <taler/taler_pq_lib.h>
      25             : #include "pg_select_order_blinded_sigs.h"
      26             : #include "pg_helper.h"
      27             : 
      28             : /**
      29             :  * @brief Context for the callback to handle the result of the blinded sigs selection.
      30             :  */
      31             : struct SelectBlindedSigsContext
      32             : {
      33             :   /**
      34             :    * @brief Callback to be called with the result of the blinded sigs selection.
      35             :    */
      36             :   void *cb_cls;
      37             : 
      38             :   /**
      39             :    * @brief Callback to be called with the result of the blinded sigs selection.
      40             :    */
      41             :   TALER_MERCHANTDB_BlindedSigCallback cb;
      42             : 
      43             :   /**
      44             :    * @brief Result status of the query.
      45             :    */
      46             :   enum GNUNET_DB_QueryStatus qs;
      47             : };
      48             : 
      49             : 
      50             : /**
      51             :  * @brief Callback to handle the result of the blinded sigs selection.
      52             :  *
      53             :  * @param cls the closure containing the callback and its context
      54             :  * @param result the result of the query
      55             :  * @param num_results number of results in the result set
      56             :  */
      57             : static void
      58           2 : restore_sig_cb (void *cls,
      59             :                 PGresult *result,
      60             :                 unsigned int num_results)
      61             : {
      62           2 :   struct SelectBlindedSigsContext *ctx = cls;
      63             : 
      64           2 :   for (unsigned int i = 0; i < num_results; i++)
      65             :   {
      66             :     struct GNUNET_HashCode h_issue;
      67             :     struct GNUNET_CRYPTO_BlindedSignature *sig;
      68           0 :     struct GNUNET_PQ_ResultSpec rs[] = {
      69           0 :       GNUNET_PQ_result_spec_auto_from_type ("token_hash",
      70             :                                             &h_issue),
      71           0 :       GNUNET_PQ_result_spec_blinded_sig ("token_blinded_signature",
      72             :                                          &sig),
      73             :       GNUNET_PQ_result_spec_end
      74             :     };
      75             : 
      76           0 :     if (GNUNET_OK !=
      77           0 :         GNUNET_PQ_extract_result (result,
      78             :                                   rs,
      79             :                                   i))
      80             :     {
      81           0 :       ctx->qs = GNUNET_DB_STATUS_HARD_ERROR;
      82           0 :       return;
      83             :     }
      84           0 :     ctx->cb (ctx->cb_cls,
      85             :              &h_issue,
      86             :              sig);
      87           0 :     GNUNET_PQ_cleanup_result (rs);
      88             :   }
      89             : }
      90             : 
      91             : 
      92             : enum GNUNET_DB_QueryStatus
      93           2 : TMH_PG_select_order_blinded_sigs (
      94             :   void *cls,
      95             :   const char *order_id,
      96             :   TALER_MERCHANTDB_BlindedSigCallback cb,
      97             :   void *cb_cls)
      98             : {
      99           2 :   struct PostgresClosure *pg = cls;
     100           2 :   struct SelectBlindedSigsContext ctx = {
     101             :     .cb = cb,
     102             :     .cb_cls = cb_cls,
     103             :     .qs = GNUNET_DB_STATUS_SUCCESS_NO_RESULTS
     104             :   };
     105             : 
     106           2 :   struct GNUNET_PQ_QueryParam params[] = {
     107           2 :     GNUNET_PQ_query_param_string (order_id),
     108             :     GNUNET_PQ_query_param_end
     109             :   };
     110             : 
     111           2 :   check_connection (pg);
     112           2 :   PREPARE (pg,
     113             :            "select_blinded_sigs",
     114             :            "SELECT"
     115             :            "  motbs.token_blinded_signature"
     116             :            " ,motbs.token_hash"
     117             :            " FROM merchant_order_token_blinded_sigs AS motbs"
     118             :            " JOIN merchant_contract_terms AS mct USING (order_serial)"
     119             :            " WHERE mct.order_id = $1"
     120             :            " ORDER BY motbs.token_index ASC");
     121           2 :   return GNUNET_PQ_eval_prepared_multi_select (
     122             :     pg->conn,
     123             :     "select_blinded_sigs",
     124             :     params,
     125             :     &restore_sig_cb,
     126             :     &ctx);
     127             : }