donau

Donation authority for GNU Taler (experimental)
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lookup_issued_receipts.c (2669B)

      1 /*
      2    This file is part of TALER
      3    Copyright (C) 2024, 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 src/donaudb/lookup_issued_receipts.c
     18  * @brief Implementation of the lookup_issued_receipts function for Postgres
     19  * @author Lukas Matyja
     20  */
     21 #include <donau_config.h>
     22 #include <taler/taler_error_codes.h>
     23 #include <taler/taler_dbevents.h>
     24 #include <taler/taler_pq_lib.h>
     25 #include "lookup_issued_receipts.h"
     26 #include "helper.h"
     27 #include "donau_pq_lib.h"
     28 
     29 enum GNUNET_DB_QueryStatus
     30 DONAUDB_lookup_issued_receipts (struct DONAUDB_PostgresContext *ctx,
     31                                 struct DONAU_DonationReceiptHashP *h_receipts,
     32                                 struct DONAUDB_IssuedReceiptsMetaData *meta)
     33 {
     34   struct GNUNET_PQ_QueryParam params[] = {
     35     GNUNET_PQ_query_param_auto_from_type (h_receipts),
     36     GNUNET_PQ_query_param_end
     37   };
     38   struct DONAU_BlindedDonationUnitSignature *du_sigs;
     39   size_t num_sigs;
     40   struct GNUNET_PQ_ResultSpec rs[] = {
     41     DONAU_PQ_result_spec_array_blinded_donation_unit_sig (
     42       ctx->conn,
     43       "blinded_sig",
     44       &num_sigs,
     45       &du_sigs),
     46     TALER_PQ_RESULT_SPEC_AMOUNT ("amount",
     47                                  &meta->amount),
     48     GNUNET_PQ_result_spec_uint64 ("charity_id",
     49                                   &meta->charity_id),
     50     GNUNET_PQ_result_spec_end
     51   };
     52   enum GNUNET_DB_QueryStatus qs;
     53 
     54   PREPARE (ctx,
     55            "lookup_issued_receipts",
     56            "SELECT "
     57            " blinded_sig"
     58            " ,amount"
     59            " ,charity_id"
     60            " FROM receipts_issued"
     61            " WHERE receipt_hash=$1;");
     62   qs = GNUNET_PQ_eval_prepared_singleton_select (ctx->conn,
     63                                                  "lookup_issued_receipts",
     64                                                  params,
     65                                                  rs);
     66   if (qs > 0)
     67   {
     68     /* prevent the result cleanup from freeing the signatures */
     69     meta->num_sig = num_sigs;
     70     meta->blinded_sigs = du_sigs;
     71     num_sigs = 0;
     72     du_sigs = NULL;
     73   }
     74   GNUNET_PQ_cleanup_result (rs);
     75   return qs;
     76 }