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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_coin_denomination.c
* @brief Implementation of the get_coin_denomination 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_coin_denomination.h"
#include "pg_helper.h"
enum GNUNET_DB_QueryStatus
TEH_PG_get_coin_denomination (
void *cls,
const struct TALER_CoinSpendPublicKeyP *coin_pub,
uint64_t *known_coin_id,
struct TALER_DenominationHashP *denom_hash)
{
struct PostgresClosure *pg = cls;
struct GNUNET_PQ_QueryParam params[] = {
GNUNET_PQ_query_param_auto_from_type (coin_pub),
GNUNET_PQ_query_param_end
};
struct GNUNET_PQ_ResultSpec rs[] = {
GNUNET_PQ_result_spec_auto_from_type ("denom_pub_hash",
denom_hash),
GNUNET_PQ_result_spec_uint64 ("known_coin_id",
known_coin_id),
GNUNET_PQ_result_spec_end
};
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Getting coin denomination of coin %s\n",
TALER_B2S (coin_pub));
/* Used in #postgres_get_coin_denomination() to fetch
the denomination public key hash for
a coin known to the exchange. */
PREPARE (pg,
"get_coin_denomination",
"SELECT"
" denominations.denom_pub_hash"
",known_coin_id"
" FROM known_coins"
" JOIN denominations USING (denominations_serial)"
" WHERE coin_pub=$1"
" FOR SHARE;");
return GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
"get_coin_denomination",
params,
rs);
}
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