select_refreshes_above_serial_id.c (5564B)
1 /* 2 This file is part of TALER 3 Copyright (C) 2022, 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 exchangedb/select_refreshes_above_serial_id.c 18 * @brief Implementation of the select_refreshes_above_serial_id function for Postgres 19 * @author Christian Grothoff 20 */ 21 #include "taler/taler_pq_lib.h" 22 #include "exchange-database/select_refreshes_above_serial_id.h" 23 #include "helper.h" 24 25 26 /** 27 * Closure for #refreshs_serial_helper_cb(). 28 */ 29 struct RefreshsSerialContext 30 { 31 32 /** 33 * Callback to call. 34 */ 35 TALER_EXCHANGEDB_RefreshesCallback cb; 36 37 /** 38 * Closure for @e cb. 39 */ 40 void *cb_cls; 41 42 /** 43 * Plugin context. 44 */ 45 struct TALER_EXCHANGEDB_PostgresContext *pg; 46 47 /** 48 * Status code, set to #GNUNET_SYSERR on hard errors. 49 */ 50 enum GNUNET_GenericReturnValue status; 51 }; 52 53 54 /** 55 * Helper function to be called with the results of a SELECT statement 56 * that has returned @a num_results results. 57 * 58 * @param cls closure of type `struct RefreshsSerialContext` 59 * @param result the postgres result 60 * @param num_results the number of results in @a result 61 */ 62 static void 63 refreshs_serial_helper_cb (void *cls, 64 PGresult *result, 65 unsigned int num_results) 66 { 67 struct RefreshsSerialContext *rsc = cls; 68 struct TALER_EXCHANGEDB_PostgresContext *pg = rsc->pg; 69 70 for (unsigned int i = 0; i<num_results; i++) 71 { 72 struct TALER_DenominationPublicKey old_denom_pub; 73 struct TALER_CoinSpendPublicKeyP coin_pub; 74 struct TALER_CoinSpendSignatureP coin_sig; 75 struct TALER_AgeCommitmentHashP h_age_commitment; 76 bool ac_isnull; 77 struct TALER_Amount amount_with_fee; 78 uint64_t rowid; 79 struct TALER_RefreshCommitmentP rc; 80 size_t num_nds; 81 uint64_t *nds; 82 struct GNUNET_PQ_ResultSpec rs[] = { 83 TALER_PQ_result_spec_denom_pub ("old_denom_pub", 84 &old_denom_pub), 85 GNUNET_PQ_result_spec_auto_from_type ("old_coin_pub", 86 &coin_pub), 87 GNUNET_PQ_result_spec_allow_null ( 88 GNUNET_PQ_result_spec_auto_from_type ("age_commitment_hash", 89 &h_age_commitment), 90 &ac_isnull), 91 GNUNET_PQ_result_spec_auto_from_type ("old_coin_sig", 92 &coin_sig), 93 TALER_PQ_RESULT_SPEC_AMOUNT ("amount_with_fee", 94 &amount_with_fee), 95 GNUNET_PQ_result_spec_uint64 ("refresh_id", 96 &rowid), 97 GNUNET_PQ_result_spec_auto_from_type ("rc", 98 &rc), 99 GNUNET_PQ_result_spec_array_uint64 (pg->conn, 100 "new_denominations_serials", 101 &num_nds, 102 &nds), 103 GNUNET_PQ_result_spec_end 104 }; 105 enum GNUNET_GenericReturnValue ret; 106 107 if (GNUNET_OK != 108 GNUNET_PQ_extract_result (result, 109 rs, 110 i)) 111 { 112 GNUNET_break (0); 113 rsc->status = GNUNET_SYSERR; 114 return; 115 } 116 117 ret = rsc->cb (rsc->cb_cls, 118 rowid, 119 &old_denom_pub, 120 &coin_pub, 121 &coin_sig, 122 ac_isnull ? NULL : &h_age_commitment, 123 &amount_with_fee, 124 num_nds, 125 nds, 126 &rc); 127 GNUNET_PQ_cleanup_result (rs); 128 if (GNUNET_OK != ret) 129 break; 130 } 131 } 132 133 134 enum GNUNET_DB_QueryStatus 135 TALER_EXCHANGEDB_select_refreshes_above_serial_id ( 136 struct TALER_EXCHANGEDB_PostgresContext *pg, 137 uint64_t serial_id, 138 TALER_EXCHANGEDB_RefreshesCallback cb, 139 void *cb_cls) 140 { 141 struct GNUNET_PQ_QueryParam params[] = { 142 GNUNET_PQ_query_param_uint64 (&serial_id), 143 GNUNET_PQ_query_param_end 144 }; 145 struct RefreshsSerialContext rsc = { 146 .cb = cb, 147 .cb_cls = cb_cls, 148 .pg = pg, 149 .status = GNUNET_OK 150 }; 151 enum GNUNET_DB_QueryStatus qs; 152 153 PREPARE (pg, 154 "select_refreshes_above_serial_id", 155 "SELECT" 156 " denom.denom_pub AS old_denom_pub" 157 ",r.old_coin_pub" 158 ",kc.age_commitment_hash" 159 ",r.old_coin_sig" 160 ",r.amount_with_fee" 161 ",r.refresh_id" 162 ",r.rc" 163 ",r.denom_serials AS new_denominations_serials" 164 " FROM refresh r" 165 " JOIN known_coins kc" 166 " ON (r.old_coin_pub = kc.coin_pub)" 167 " JOIN denominations denom" 168 " ON (kc.denominations_serial = denom.denominations_serial)" 169 " WHERE refresh_id>=$1" 170 " ORDER BY refresh_id ASC;"); 171 qs = GNUNET_PQ_eval_prepared_multi_select ( 172 pg->conn, 173 "select_refreshes_above_serial_id", 174 params, 175 &refreshs_serial_helper_cb, 176 &rsc); 177 if (GNUNET_OK != rsc.status) 178 return GNUNET_DB_STATUS_HARD_ERROR; 179 return qs; 180 }