merchant

Merchant backend to process payments, run by merchants
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pg_lookup_deposits_by_order.c (5211B)

      1 /*
      2    This file is part of TALER
      3    Copyright (C) 2023, 2024 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_lookup_deposits_by_order.c
     18  * @brief Implementation of the lookup_deposits_by_order function for Postgres
     19  * @author Iván Ávalos
     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_lookup_deposits_by_order.h"
     26 #include "pg_helper.h"
     27 
     28 /**
     29  * Closure for lookup_deposits_by_order_cb().
     30  */
     31 struct LookupDepositsByOrderContext
     32 {
     33 
     34   /**
     35    * Plugin context.
     36    */
     37   struct PostgresClosure *pg;
     38 
     39   /**
     40    * Function to call with all results.
     41    */
     42   TALER_MERCHANTDB_DepositedCoinsCallback cb;
     43 
     44   /**
     45    * Closure for @e cb.
     46    */
     47   void *cb_cls;
     48 
     49   /**
     50    * Set to the query result.
     51    */
     52   enum GNUNET_DB_QueryStatus qs;
     53 };
     54 
     55 
     56 /**
     57  * Function to be called with the results of a SELECT statement
     58  * that has returned @a num_results results.
     59  *
     60  * @param cls of type `struct LookupDepositsByOrderContext *`
     61  * @param result the postgres result
     62  * @param num_results the number of results in @a result
     63  */
     64 static void
     65 lookup_deposits_by_order_cb (void *cls,
     66                              PGresult *result,
     67                              unsigned int num_results)
     68 {
     69   struct LookupDepositsByOrderContext *ldoc = cls;
     70 
     71   for (unsigned int i = 0; i<num_results; i++)
     72   {
     73     uint64_t deposit_serial;
     74     char *exchange_url;
     75     struct TALER_MerchantWireHashP h_wire;
     76     struct TALER_CoinSpendPublicKeyP coin_pub;
     77     struct GNUNET_TIME_Timestamp deposit_timestamp;
     78     struct TALER_Amount amount_with_fee;
     79     struct TALER_Amount deposit_fee;
     80     struct GNUNET_PQ_ResultSpec rs[] = {
     81       GNUNET_PQ_result_spec_uint64 ("deposit_serial",
     82                                     &deposit_serial),
     83       GNUNET_PQ_result_spec_string ("exchange_url",
     84                                     &exchange_url),
     85       GNUNET_PQ_result_spec_timestamp ("deposit_timestamp",
     86                                        &deposit_timestamp),
     87       GNUNET_PQ_result_spec_auto_from_type ("h_wire",
     88                                             &h_wire),
     89       TALER_PQ_result_spec_amount_with_currency ("amount_with_fee",
     90                                                  &amount_with_fee),
     91       TALER_PQ_result_spec_amount_with_currency ("deposit_fee",
     92                                                  &deposit_fee),
     93       GNUNET_PQ_result_spec_auto_from_type ("coin_pub",
     94                                             &coin_pub),
     95       GNUNET_PQ_result_spec_end
     96     };
     97 
     98     if (GNUNET_OK !=
     99         GNUNET_PQ_extract_result (result,
    100                                   rs,
    101                                   i))
    102     {
    103       GNUNET_break (0);
    104       ldoc->qs = GNUNET_DB_STATUS_HARD_ERROR;
    105       return;
    106     }
    107     ldoc->cb (ldoc->cb_cls,
    108               deposit_serial,
    109               exchange_url,
    110               &h_wire,
    111               deposit_timestamp,
    112               &amount_with_fee,
    113               &deposit_fee,
    114               &coin_pub);
    115     GNUNET_PQ_cleanup_result (rs); /* technically useless here */
    116   }
    117   ldoc->qs = num_results;
    118 }
    119 
    120 
    121 enum GNUNET_DB_QueryStatus
    122 TMH_PG_lookup_deposits_by_order (void *cls,
    123                                  uint64_t order_serial,
    124                                  TALER_MERCHANTDB_DepositedCoinsCallback cb,
    125                                  void *cb_cls)
    126 {
    127   struct PostgresClosure *pg = cls;
    128   struct LookupDepositsByOrderContext ldoc = {
    129     .pg = pg,
    130     .cb = cb,
    131     .cb_cls = cb_cls
    132   };
    133   struct GNUNET_PQ_QueryParam params[] = {
    134     GNUNET_PQ_query_param_uint64 (&order_serial),
    135     GNUNET_PQ_query_param_end
    136   };
    137   enum GNUNET_DB_QueryStatus qs;
    138 
    139   check_connection (pg);
    140   PREPARE (pg,
    141            "lookup_deposits_by_order",
    142            "SELECT"
    143            " dep.deposit_serial"
    144            ",mcon.exchange_url"
    145            ",acc.h_wire"
    146            ",mcon.deposit_timestamp"
    147            ",dep.amount_with_fee"
    148            ",dep.deposit_fee"
    149            ",dep.coin_pub"
    150            " FROM merchant_deposits dep"
    151            " JOIN merchant_deposit_confirmations mcon"
    152            "   USING(deposit_confirmation_serial)"
    153            " JOIN merchant_accounts acc"
    154            "   USING (account_serial)"
    155            " WHERE mcon.order_serial=$1");
    156 
    157   qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
    158                                              "lookup_deposits_by_order",
    159                                              params,
    160                                              &lookup_deposits_by_order_cb,
    161                                              &ldoc);
    162 
    163   if (qs < 0)
    164     return qs;
    165   return ldoc.qs;
    166 }