72 lines
2.5 KiB
C
72 lines
2.5 KiB
C
/*
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This file is part of TALER
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Copyright (C) 2022 Taler Systems SA
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TALER is free software; you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation; either version 3, or (at your option) any later version.
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TALER is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
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*/
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/**
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* @file exchangedb/pg_get_coin_denomination.c
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* @brief Implementation of the get_coin_denomination function for Postgres
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* @author Christian Grothoff
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*/
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#include "platform.h"
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#include "taler_error_codes.h"
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#include "taler_dbevents.h"
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#include "taler_pq_lib.h"
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#include "pg_get_coin_denomination.h"
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#include "pg_helper.h"
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enum GNUNET_DB_QueryStatus
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TEH_PG_get_coin_denomination (
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void *cls,
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const struct TALER_CoinSpendPublicKeyP *coin_pub,
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uint64_t *known_coin_id,
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struct TALER_DenominationHashP *denom_hash)
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{
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struct PostgresClosure *pg = cls;
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struct GNUNET_PQ_QueryParam params[] = {
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GNUNET_PQ_query_param_auto_from_type (coin_pub),
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GNUNET_PQ_query_param_end
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};
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struct GNUNET_PQ_ResultSpec rs[] = {
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GNUNET_PQ_result_spec_auto_from_type ("denom_pub_hash",
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denom_hash),
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GNUNET_PQ_result_spec_uint64 ("known_coin_id",
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known_coin_id),
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GNUNET_PQ_result_spec_end
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};
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GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
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"Getting coin denomination of coin %s\n",
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TALER_B2S (coin_pub));
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/* Used in #postgres_get_coin_denomination() to fetch
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the denomination public key hash for
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a coin known to the exchange. */
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PREPARE (pg,
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"get_coin_denomination",
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"SELECT"
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" denominations.denom_pub_hash"
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",known_coin_id"
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" FROM known_coins"
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" JOIN denominations USING (denominations_serial)"
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" WHERE coin_pub=$1"
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" FOR SHARE;");
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return GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
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"get_coin_denomination",
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params,
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rs);
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}
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