66 lines
2.3 KiB
C
66 lines
2.3 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_old_coin_by_h_blind.c
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* @brief Implementation of the get_old_coin_by_h_blind 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_old_coin_by_h_blind.h"
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#include "pg_helper.h"
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enum GNUNET_DB_QueryStatus
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TEH_PG_get_old_coin_by_h_blind (
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void *cls,
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const struct TALER_BlindedCoinHashP *h_blind_ev,
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struct TALER_CoinSpendPublicKeyP *old_coin_pub,
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uint64_t *rrc_serial)
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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 (h_blind_ev),
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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 ("old_coin_pub",
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old_coin_pub),
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GNUNET_PQ_result_spec_uint64 ("rrc_serial",
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rrc_serial),
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GNUNET_PQ_result_spec_end
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};
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/* Used in #postgres_get_old_coin_by_h_blind() */
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PREPARE (pg,
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"old_coin_by_h_blind",
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"SELECT"
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" okc.coin_pub AS old_coin_pub"
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",rrc_serial"
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" FROM refresh_revealed_coins rrc"
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" JOIN refresh_commitments rcom USING (melt_serial_id)"
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" JOIN known_coins okc ON (rcom.old_coin_pub = okc.coin_pub)"
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" WHERE h_coin_ev=$1"
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" LIMIT 1;");
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return GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
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"old_coin_by_h_blind",
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params,
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rs);
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}
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