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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_melt.c
* @brief Implementation of the get_melt 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_melt.h"
#include "pg_helper.h"
enum GNUNET_DB_QueryStatus
TEH_PG_get_melt (void *cls,
const struct TALER_RefreshCommitmentP *rc,
struct TALER_EXCHANGEDB_Melt *melt,
uint64_t *melt_serial_id)
{
struct PostgresClosure *pg = cls;
bool h_age_commitment_is_null;
struct GNUNET_PQ_QueryParam params[] = {
GNUNET_PQ_query_param_auto_from_type (rc),
GNUNET_PQ_query_param_end
};
struct GNUNET_PQ_ResultSpec rs[] = {
GNUNET_PQ_result_spec_auto_from_type ("denom_pub_hash",
&melt->session.coin.
denom_pub_hash),
TALER_PQ_RESULT_SPEC_AMOUNT ("fee_refresh",
&melt->melt_fee),
GNUNET_PQ_result_spec_uint32 ("noreveal_index",
&melt->session.noreveal_index),
GNUNET_PQ_result_spec_auto_from_type ("old_coin_pub",
&melt->session.coin.coin_pub),
GNUNET_PQ_result_spec_auto_from_type ("old_coin_sig",
&melt->session.coin_sig),
GNUNET_PQ_result_spec_allow_null (
GNUNET_PQ_result_spec_auto_from_type ("age_commitment_hash",
&melt->session.coin.h_age_commitment),
&h_age_commitment_is_null),
TALER_PQ_RESULT_SPEC_AMOUNT ("amount_with_fee",
&melt->session.amount_with_fee),
GNUNET_PQ_result_spec_uint64 ("melt_serial_id",
melt_serial_id),
GNUNET_PQ_result_spec_end
};
enum GNUNET_DB_QueryStatus qs;
memset (&melt->session.coin.denom_sig,
0,
sizeof (melt->session.coin.denom_sig));
/* Used in #postgres_get_melt() to fetch
high-level information about a melt operation */
PREPARE (pg,
"get_melt",
/* "SELECT"
" denoms.denom_pub_hash"
",denoms.fee_refresh_val"
",denoms.fee_refresh_frac"
",old_coin_pub"
",old_coin_sig"
",kc.age_commitment_hash"
",amount_with_fee_val"
",amount_with_fee_frac"
",noreveal_index"
",melt_serial_id"
" FROM refresh_commitments"
" JOIN known_coins kc"
" ON (old_coin_pub = kc.coin_pub)"
" JOIN denominations denoms"
" ON (kc.denominations_serial = denoms.denominations_serial)"
" WHERE rc=$1;", */
"WITH rc AS MATERIALIZED ( "
" SELECT"
" * FROM refresh_commitments"
" WHERE rc=$1"
")"
"SELECT"
" denoms.denom_pub_hash"
",denoms.fee_refresh_val"
",denoms.fee_refresh_frac"
",rc.old_coin_pub"
",rc.old_coin_sig"
",kc.age_commitment_hash"
",amount_with_fee_val"
",amount_with_fee_frac"
",noreveal_index"
",melt_serial_id "
"FROM ("
" SELECT"
" * "
" FROM known_coins"
" WHERE coin_pub=(SELECT old_coin_pub from rc)"
") kc "
"JOIN rc"
" ON (kc.coin_pub=rc.old_coin_pub) "
"JOIN denominations denoms"
" USING (denominations_serial);");
qs = GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
"get_melt",
params,
rs);
if (h_age_commitment_is_null)
memset (&melt->session.coin.h_age_commitment,
0,
sizeof(melt->session.coin.h_age_commitment));
melt->session.rc = *rc;
return qs;
}
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