Line data    Source code

       1             : /*
       2             :    This file is part of TALER
       3             :    Copyright (C) 2023 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_transfer.c
      18             :  * @brief Implementation of the lookup_transfer 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_transfer.h"
      26             : #include "pg_helper.h"
      27             : 
      28             : enum GNUNET_DB_QueryStatus
      29           2 : TMH_PG_lookup_transfer (void *cls,
      30             :                         const char *instance_id,
      31             :                         const char *exchange_url,
      32             :                         const struct TALER_WireTransferIdentifierRawP *wtid,
      33             :                         struct TALER_Amount *total_amount,
      34             :                         struct TALER_Amount *wire_fee,
      35             :                         struct TALER_Amount *exchange_amount,
      36             :                         struct GNUNET_TIME_Timestamp *execution_time,
      37             :                         bool *have_exchange_sig,
      38             :                         bool *verified)
      39             : {
      40           2 :   struct PostgresClosure *pg = cls;
      41           2 :   struct GNUNET_PQ_QueryParam params[] = {
      42           2 :     GNUNET_PQ_query_param_string (exchange_url),
      43           2 :     GNUNET_PQ_query_param_auto_from_type (wtid),
      44           2 :     GNUNET_PQ_query_param_string (instance_id),
      45             :     GNUNET_PQ_query_param_end
      46             :   };
      47             :   uint8_t verified8;
      48             :   /** Amount we got actually credited, _excludes_ the wire fee */
      49             :   bool no_sig;
      50             :   struct TALER_Amount credit_amount;
      51           2 :   struct GNUNET_PQ_ResultSpec rs[] = {
      52           2 :     TALER_PQ_result_spec_amount_with_currency ("credit_amount",
      53             :                                                &credit_amount),
      54           2 :     GNUNET_PQ_result_spec_allow_null (
      55             :       TALER_PQ_result_spec_amount_with_currency ("wire_fee",
      56             :                                                  wire_fee),
      57             :       &no_sig),
      58           2 :     GNUNET_PQ_result_spec_allow_null (
      59             :       TALER_PQ_result_spec_amount_with_currency ("exchange_amount",
      60             :                                                  exchange_amount),
      61             :       NULL),
      62           2 :     GNUNET_PQ_result_spec_allow_null (
      63             :       GNUNET_PQ_result_spec_timestamp ("execution_time",
      64             :                                        execution_time),
      65             :       NULL),
      66           2 :     GNUNET_PQ_result_spec_auto_from_type ("verified",
      67             :                                           &verified8),
      68             :     GNUNET_PQ_result_spec_end
      69             :   };
      70             :   enum GNUNET_DB_QueryStatus qs;
      71             : 
      72           2 :   check_connection (pg);
      73           2 :   *execution_time = GNUNET_TIME_UNIT_ZERO_TS;
      74             : 
      75           2 :   PREPARE (pg,
      76             :            "lookup_transfer",
      77             :            "SELECT"
      78             :            " mt.credit_amount AS credit_amount"
      79             :            ",mts.credit_amount AS exchange_amount"
      80             :            ",wire_fee"
      81             :            ",execution_time"
      82             :            ",verified"
      83             :            " FROM merchant_transfers mt"
      84             :            "  JOIN merchant_accounts USING (account_serial)"
      85             :            "  JOIN merchant_instances USING (merchant_serial)"
      86             :            "  LEFT JOIN merchant_transfer_signatures mts USING (credit_serial)"
      87             :            " WHERE wtid=$2"
      88             :            "   AND exchange_url=$1"
      89             :            "   AND merchant_id=$3;");
      90             : 
      91           2 :   qs = GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
      92             :                                                  "lookup_transfer",
      93             :                                                  params,
      94             :                                                  rs);
      95           2 :   GNUNET_log (GNUNET_ERROR_TYPE_INFO,
      96             :               "Lookup transfer returned %d\n",
      97             :               qs);
      98           2 :   if (qs > 0)
      99             :   {
     100           2 :     *have_exchange_sig = ! no_sig;
     101           2 :     *verified = (0 != verified8);
     102           2 :     if (GNUNET_OK !=
     103           2 :         TALER_amount_cmp_currency (&credit_amount,
     104             :                                    wire_fee))
     105             :     {
     106           0 :       GNUNET_break (0);
     107           0 :       return GNUNET_DB_STATUS_HARD_ERROR;
     108             :     }
     109           4 :     if ( (! no_sig) &&
     110             :          (0 >
     111           2 :           TALER_amount_add (total_amount,
     112             :                             &credit_amount,
     113             :                             wire_fee)) )
     114             :     {
     115           0 :       GNUNET_break (0);
     116           0 :       return GNUNET_DB_STATUS_HARD_ERROR;
     117             :     }
     118             :   }
     119             :   else
     120             :   {
     121           0 :     *verified = false;
     122           0 :     *have_exchange_sig = false;
     123             :   }
     124           2 :   return qs;
     125             : }