lock_product.h (2216B)
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 src/include/merchant-database/lock_product.h 18 * @brief implementation of the lock_product function for Postgres 19 * @author Iván Ávalos 20 */ 21 #ifndef MERCHANT_DATABASE_LOCK_PRODUCT_H 22 #define MERCHANT_DATABASE_LOCK_PRODUCT_H 23 24 #include <taler/taler_util.h> 25 #include <taler/taler_json_lib.h> 26 #include "merchantdb_lib.h" 27 28 29 struct TALER_MERCHANTDB_PostgresContext; 30 /** 31 * Lock stocks of a particular product. Note that the transaction must 32 * enforce that the "stocked-sold-lost >= locked" constraint holds. 33 * 34 * @param pg database context 35 * @param instance_id instance to lookup products for 36 * @param product_id product to lookup 37 * @param uuid the UUID that holds the lock 38 * @param quantity how many units should be locked 39 * @param quantity_frac fractional component of quantity in units of 40 * 1/1000000 of the base value 41 * @param expiration_time when should the lock expire 42 * @return database result code, #GNUNET_DB_STATUS_SUCCESS_NO_RESULTS if the 43 * product is unknown OR if there insufficient stocks remaining 44 */ 45 enum GNUNET_DB_QueryStatus 46 TALER_MERCHANTDB_lock_product (struct TALER_MERCHANTDB_PostgresContext *pg, 47 const char *instance_id, 48 const char *product_id, 49 const struct GNUNET_Uuid *uuid, 50 uint64_t quantity, 51 uint32_t quantity_frac, 52 struct GNUNET_TIME_Timestamp expiration_time); 53 54 #endif