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/*
This file is part of TALER
Copyright (C) 2022 Taler Systems SA
TALER is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation; either version 3, or (at your option) any later version.
TALER is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
/**
* @file backenddb/pg_lock_product.h
* @brief implementation of the lock_product function for Postgres
* @author Iván Ávalos
*/
#ifndef PG_LOCK_PRODUCT_H
#define PG_LOCK_PRODUCT_H
#include <taler/taler_util.h>
#include <taler/taler_json_lib.h>
#include "taler_merchantdb_plugin.h"
/**
* Lock stocks of a particular product. Note that the transaction must
* enforce that the "stocked-sold-lost >= locked" constraint holds.
*
* @param cls closure
* @param instance_id instance to lookup products for
* @param product_id product to lookup
* @param uuid the UUID that holds the lock
* @param quantity how many units should be locked
* @param expiration_time when should the lock expire
* @return database result code, #GNUNET_DB_STATUS_SUCCESS_NO_RESULTS if the
* product is unknown OR if there insufficient stocks remaining
*/
enum GNUNET_DB_QueryStatus
TMH_PG_lock_product (void *cls,
const char *instance_id,
const char *product_id,
const struct GNUNET_Uuid *uuid,
uint64_t quantity,
struct GNUNET_TIME_Timestamp expiration_time);
#endif
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