iterate_exchange_debit_transfers.c (5931B)
1 /* 2 This file is part of TALER 3 Copyright (C) 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/iterate_exchange_debit_transfers.c 18 * @brief Implementation of the iterate_exchange_debit_transfers function for Postgres 19 * @author Christian Grothoff 20 */ 21 #include "taler/taler_pq_lib.h" 22 #include "exchange-database/iterate_exchange_debit_transfers.h" 23 #include "helper.h" 24 25 26 /** 27 * Hard upper bound on the number of records returned by a single 28 * call, regardless of the limit requested by the client. 29 */ 30 #define MAX_RECORDS 50000 31 32 33 /** 34 * Closure for #handle_aml_result. 35 */ 36 struct SelectTransferContext 37 { 38 /** 39 * Function to call on each result. 40 */ 41 TALER_EXCHANGEDB_AmlTransferCallback cb; 42 43 /** 44 * Closure for @e cb. 45 */ 46 void *cb_cls; 47 48 /** 49 * Plugin context. 50 */ 51 struct TALER_EXCHANGEDB_PostgresContext *pg; 52 53 /** 54 * Set to #GNUNET_SYSERR on serious errors. 55 */ 56 enum GNUNET_GenericReturnValue status; 57 }; 58 59 60 /** 61 * Function to be called with the results of a SELECT statement 62 * that has returned @a num_results results. Helper function 63 * for #TALER_EXCHANGEDB_iterate_exchange_debit_transfers(). 64 * 65 * @param cls closure of type `struct SelectTransferContext *` 66 * @param result the postgres result 67 * @param num_results the number of results in @a result 68 */ 69 static void 70 handle_transfer_cb (void *cls, 71 PGresult *result, 72 unsigned int num_results) 73 { 74 struct SelectTransferContext *stc = cls; 75 struct TALER_EXCHANGEDB_PostgresContext *pg = stc->pg; 76 77 for (unsigned int i = 0; i<num_results; i++) 78 { 79 char *payto_uri; 80 uint64_t rowid; 81 struct GNUNET_TIME_Absolute execution_time; 82 struct TALER_Amount amount; 83 struct GNUNET_PQ_ResultSpec rs[] = { 84 GNUNET_PQ_result_spec_uint64 ("serial_id", 85 &rowid), 86 GNUNET_PQ_result_spec_string ("payto_uri", 87 &payto_uri), 88 GNUNET_PQ_result_spec_absolute_time ("execution_time", 89 &execution_time), 90 TALER_PQ_RESULT_SPEC_AMOUNT ("amount", 91 &amount), 92 GNUNET_PQ_result_spec_end 93 }; 94 95 if (GNUNET_OK != 96 GNUNET_PQ_extract_result (result, 97 rs, 98 i)) 99 { 100 GNUNET_break (0); 101 stc->status = GNUNET_SYSERR; 102 return; 103 } 104 stc->cb (stc->cb_cls, 105 rowid, 106 payto_uri, 107 execution_time, 108 &amount); 109 GNUNET_PQ_cleanup_result (rs); 110 } 111 } 112 113 114 enum GNUNET_DB_QueryStatus 115 TALER_EXCHANGEDB_iterate_exchange_debit_transfers ( 116 struct TALER_EXCHANGEDB_PostgresContext *pg, 117 const struct TALER_Amount *threshold, 118 uint64_t offset, 119 int64_t limit, 120 const struct TALER_NormalizedPaytoHashP *h_payto, 121 TALER_EXCHANGEDB_AmlTransferCallback cb, 122 void *cb_cls) 123 { 124 struct SelectTransferContext stc = { 125 .pg = pg, 126 .cb = cb, 127 .cb_cls = cb_cls, 128 .status = GNUNET_OK 129 }; 130 uint64_t ulimit = GNUNET_MIN ((uint64_t) MAX_RECORDS, 131 TALER_EXCHANGEDB_abs_limit (limit)); 132 struct GNUNET_PQ_QueryParam params[] = { 133 GNUNET_PQ_query_param_uint64 (&offset), 134 GNUNET_PQ_query_param_uint64 (&ulimit), 135 TALER_PQ_query_param_amount (pg->conn, 136 threshold), 137 NULL != h_payto 138 ? GNUNET_PQ_query_param_auto_from_type (h_payto) 139 : GNUNET_PQ_query_param_null (), 140 GNUNET_PQ_query_param_end 141 }; 142 enum GNUNET_DB_QueryStatus qs; 143 144 PREPARE (pg, 145 "iterate_exchange_debit_transfers_inc", 146 "SELECT" 147 " wo.wireout_uuid AS serial_id" 148 ",wt.payto_uri" 149 ",wo.execution_date AS execution_time" 150 ",wo.amount" 151 " FROM wire_out wo" 152 " LEFT JOIN wire_targets wt" 153 " USING (wire_target_h_payto)" 154 " WHERE (wo.wireout_uuid > $1)" 155 " AND ( ($4::BYTEA IS NULL) OR (wt.h_normalized_payto=$4) )" 156 " AND ( ( (wo.amount).val > ($3::taler_amount).val)" 157 " OR ( ( (wo.amount).val >= ($3::taler_amount).val)" 158 " AND ( (wo.amount).frac >= ($3::taler_amount).frac) ) )" 159 " ORDER BY wo.wireout_uuid ASC" 160 " LIMIT $2"); 161 PREPARE (pg, 162 "iterate_exchange_debit_transfers_dec", 163 "SELECT" 164 " wo.wireout_uuid AS serial_id" 165 ",wt.payto_uri" 166 ",wo.execution_date AS execution_time" 167 ",wo.amount" 168 " FROM wire_out wo" 169 " LEFT JOIN wire_targets wt" 170 " USING (wire_target_h_payto)" 171 " WHERE (wo.wireout_uuid < $1)" 172 " AND ( ($4::BYTEA IS NULL) OR (wt.h_normalized_payto=$4) )" 173 " AND ( ( (wo.amount).val > ($3::taler_amount).val)" 174 " OR ( ( (wo.amount).val >= ($3::taler_amount).val)" 175 " AND ( (wo.amount).frac >= ($3::taler_amount).frac) ) )" 176 " ORDER BY wo.wireout_uuid DESC" 177 " LIMIT $2"); 178 qs = GNUNET_PQ_eval_prepared_multi_select ( 179 pg->conn, 180 (limit > 0) 181 ? "iterate_exchange_debit_transfers_inc" 182 : "iterate_exchange_debit_transfers_dec", 183 params, 184 &handle_transfer_cb, 185 &stc); 186 if (GNUNET_OK != stc.status) 187 return GNUNET_DB_STATUS_HARD_ERROR; 188 return qs; 189 }