Line data    Source code

       1              : /*
       2              :    This file is part of TALER
       3              :    Copyright (C) 2022 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 exchangedb/insert_contract.c
      18              :  * @brief Implementation of the insert_contract function for Postgres
      19              :  * @author Christian Grothoff
      20              :  */
      21              : #include "taler/taler_pq_lib.h"
      22              : #include "exchange-database/insert_contract.h"
      23              : #include "exchange-database/select_contract_by_purse.h"
      24              : #include "helper.h"
      25              : 
      26              : enum GNUNET_DB_QueryStatus
      27           20 : TALER_EXCHANGEDB_insert_contract (
      28              :   struct TALER_EXCHANGEDB_PostgresContext *pg,
      29              :   const struct TALER_PurseContractPublicKeyP *purse_pub,
      30              :   const struct TALER_EncryptedContract *econtract,
      31              :   bool *in_conflict)
      32              : {
      33              :   enum GNUNET_DB_QueryStatus qs;
      34           20 :   struct GNUNET_PQ_QueryParam params[] = {
      35           20 :     GNUNET_PQ_query_param_auto_from_type (purse_pub),
      36           20 :     GNUNET_PQ_query_param_auto_from_type (&econtract->contract_pub),
      37           20 :     GNUNET_PQ_query_param_fixed_size (econtract->econtract,
      38           20 :                                       econtract->econtract_size),
      39           20 :     GNUNET_PQ_query_param_auto_from_type (&econtract->econtract_sig),
      40              :     GNUNET_PQ_query_param_end
      41              :   };
      42              : 
      43           20 :   *in_conflict = false;
      44              :   /* Used in #postgres_insert_contract() */
      45           20 :   PREPARE (pg,
      46              :            "insert_contract",
      47              :            "INSERT INTO contracts"
      48              :            "  (purse_pub"
      49              :            "  ,pub_ckey"
      50              :            "  ,e_contract"
      51              :            "  ,contract_sig"
      52              :            "  ,purse_expiration"
      53              :            "  ) SELECT "
      54              :            "  $1, $2, $3, $4, purse_expiration"
      55              :            "  FROM purse_requests"
      56              :            "  WHERE purse_pub=$1"
      57              :            "  ON CONFLICT DO NOTHING;");
      58           20 :   qs = GNUNET_PQ_eval_prepared_non_select (pg->conn,
      59              :                                            "insert_contract",
      60              :                                            params);
      61           20 :   if (GNUNET_DB_STATUS_SUCCESS_NO_RESULTS != qs)
      62           20 :     return qs;
      63              :   {
      64              :     struct TALER_EncryptedContract econtract2;
      65              : 
      66            0 :     qs = TALER_TALER_EXCHANGEDB_select_contract_by_purse (pg,
      67              :                                                           purse_pub,
      68              :                                                           &econtract2);
      69            0 :     if (GNUNET_DB_STATUS_SUCCESS_ONE_RESULT != qs)
      70              :     {
      71            0 :       GNUNET_break (0);
      72            0 :       return GNUNET_DB_STATUS_HARD_ERROR;
      73              :     }
      74            0 :     if ( (0 == GNUNET_memcmp (&econtract->contract_pub,
      75            0 :                               &econtract2.contract_pub)) &&
      76            0 :          (econtract2.econtract_size ==
      77            0 :           econtract->econtract_size) &&
      78            0 :          (0 == memcmp (econtract2.econtract,
      79            0 :                        econtract->econtract,
      80            0 :                        econtract->econtract_size)) )
      81              :     {
      82            0 :       GNUNET_free (econtract2.econtract);
      83            0 :       return GNUNET_DB_STATUS_SUCCESS_NO_RESULTS;
      84              :     }
      85            0 :     GNUNET_free (econtract2.econtract);
      86            0 :     *in_conflict = true;
      87            0 :     return GNUNET_DB_STATUS_SUCCESS_ONE_RESULT;
      88              :   }
      89              : }