insert_contract.c (3318B)
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 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 struct GNUNET_PQ_QueryParam params[] = { 35 GNUNET_PQ_query_param_auto_from_type (purse_pub), 36 GNUNET_PQ_query_param_auto_from_type (&econtract->contract_pub), 37 GNUNET_PQ_query_param_fixed_size (econtract->econtract, 38 econtract->econtract_size), 39 GNUNET_PQ_query_param_auto_from_type (&econtract->econtract_sig), 40 GNUNET_PQ_query_param_end 41 }; 42 43 *in_conflict = false; 44 /* Used in #postgres_insert_contract() */ 45 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 qs = GNUNET_PQ_eval_prepared_non_select (pg->conn, 59 "insert_contract", 60 params); 61 if (GNUNET_DB_STATUS_SUCCESS_NO_RESULTS != qs) 62 return qs; 63 { 64 struct TALER_EncryptedContract econtract2; 65 66 qs = TALER_TALER_EXCHANGEDB_select_contract_by_purse (pg, 67 purse_pub, 68 &econtract2); 69 if (GNUNET_DB_STATUS_SUCCESS_ONE_RESULT != qs) 70 { 71 GNUNET_break (0); 72 return GNUNET_DB_STATUS_HARD_ERROR; 73 } 74 if ( (0 == GNUNET_memcmp (&econtract->contract_pub, 75 &econtract2.contract_pub)) && 76 (econtract2.econtract_size == 77 econtract->econtract_size) && 78 (0 == memcmp (econtract2.econtract, 79 econtract->econtract, 80 econtract->econtract_size)) ) 81 { 82 GNUNET_free (econtract2.econtract); 83 return GNUNET_DB_STATUS_SUCCESS_NO_RESULTS; 84 } 85 GNUNET_free (econtract2.econtract); 86 *in_conflict = true; 87 return GNUNET_DB_STATUS_SUCCESS_ONE_RESULT; 88 } 89 }