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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 exchangedb/pg_get_old_coin_by_h_blind.c
* @brief Implementation of the get_old_coin_by_h_blind function for Postgres
* @author Christian Grothoff
*/
#include "platform.h"
#include "taler_error_codes.h"
#include "taler_dbevents.h"
#include "taler_pq_lib.h"
#include "pg_get_old_coin_by_h_blind.h"
#include "pg_helper.h"
enum GNUNET_DB_QueryStatus
TEH_PG_get_old_coin_by_h_blind (
void *cls,
const struct TALER_BlindedCoinHashP *h_blind_ev,
struct TALER_CoinSpendPublicKeyP *old_coin_pub,
uint64_t *rrc_serial)
{
struct PostgresClosure *pg = cls;
struct GNUNET_PQ_QueryParam params[] = {
GNUNET_PQ_query_param_auto_from_type (h_blind_ev),
GNUNET_PQ_query_param_end
};
struct GNUNET_PQ_ResultSpec rs[] = {
GNUNET_PQ_result_spec_auto_from_type ("old_coin_pub",
old_coin_pub),
GNUNET_PQ_result_spec_uint64 ("rrc_serial",
rrc_serial),
GNUNET_PQ_result_spec_end
};
/* Used in #postgres_get_old_coin_by_h_blind() */
PREPARE (pg,
"old_coin_by_h_blind",
"SELECT"
" okc.coin_pub AS old_coin_pub"
",rrc_serial"
" FROM refresh_revealed_coins rrc"
" JOIN refresh_commitments rcom USING (melt_serial_id)"
" JOIN known_coins okc ON (rcom.old_coin_pub = okc.coin_pub)"
" WHERE h_coin_ev=$1"
" LIMIT 1;");
return GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
"old_coin_by_h_blind",
params,
rs);
}
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