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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_select_recoup_above_serial_id.c
* @brief Implementation of the select_recoup_above_serial_id 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_select_recoup_above_serial_id.h"
#include "pg_helper.h"
/**
* Closure for #recoup_serial_helper_cb().
*/
struct RecoupSerialContext
{
/**
* Callback to call.
*/
TALER_EXCHANGEDB_RecoupCallback cb;
/**
* Closure for @e cb.
*/
void *cb_cls;
/**
* Plugin context.
*/
struct PostgresClosure *pg;
/**
* Status code, set to #GNUNET_SYSERR on hard errors.
*/
enum GNUNET_GenericReturnValue status;
};
/**
* Helper function to be called with the results of a SELECT statement
* that has returned @a num_results results.
*
* @param cls closure of type `struct RecoupSerialContext`
* @param result the postgres result
* @param num_results the number of results in @a result
*/
static void
recoup_serial_helper_cb (void *cls,
PGresult *result,
unsigned int num_results)
{
struct RecoupSerialContext *psc = cls;
struct PostgresClosure *pg = psc->pg;
for (unsigned int i = 0; i<num_results; i++)
{
uint64_t rowid;
struct TALER_ReservePublicKeyP reserve_pub;
struct TALER_CoinPublicInfo coin;
struct TALER_CoinSpendSignatureP coin_sig;
union TALER_DenominationBlindingKeyP coin_blind;
struct TALER_Amount amount;
struct TALER_DenominationPublicKey denom_pub;
struct TALER_BlindedCoinHashP h_blind_ev;
struct GNUNET_TIME_Timestamp timestamp;
struct GNUNET_PQ_ResultSpec rs[] = {
GNUNET_PQ_result_spec_uint64 ("recoup_uuid",
&rowid),
GNUNET_PQ_result_spec_timestamp ("recoup_timestamp",
×tamp),
GNUNET_PQ_result_spec_auto_from_type ("reserve_pub",
&reserve_pub),
GNUNET_PQ_result_spec_auto_from_type ("coin_pub",
&coin.coin_pub),
TALER_PQ_result_spec_denom_pub ("denom_pub",
&denom_pub),
GNUNET_PQ_result_spec_auto_from_type ("coin_sig",
&coin_sig),
GNUNET_PQ_result_spec_auto_from_type ("coin_blind",
&coin_blind),
GNUNET_PQ_result_spec_auto_from_type ("h_blind_ev",
&h_blind_ev),
GNUNET_PQ_result_spec_auto_from_type ("denom_pub_hash",
&coin.denom_pub_hash),
GNUNET_PQ_result_spec_allow_null (
GNUNET_PQ_result_spec_auto_from_type ("age_commitment_hash",
&coin.h_age_commitment),
&coin.no_age_commitment),
TALER_PQ_result_spec_denom_sig ("denom_sig",
&coin.denom_sig),
TALER_PQ_RESULT_SPEC_AMOUNT ("amount",
&amount),
GNUNET_PQ_result_spec_end
};
int ret;
if (GNUNET_OK !=
GNUNET_PQ_extract_result (result,
rs,
i))
{
GNUNET_break (0);
psc->status = GNUNET_SYSERR;
return;
}
ret = psc->cb (psc->cb_cls,
rowid,
timestamp,
&amount,
&reserve_pub,
&coin,
&denom_pub,
&coin_sig,
&coin_blind);
GNUNET_PQ_cleanup_result (rs);
if (GNUNET_OK != ret)
break;
}
}
enum GNUNET_DB_QueryStatus
TEH_PG_select_recoup_above_serial_id (
void *cls,
uint64_t serial_id,
TALER_EXCHANGEDB_RecoupCallback cb,
void *cb_cls)
{
struct PostgresClosure *pg = cls;
struct GNUNET_PQ_QueryParam params[] = {
GNUNET_PQ_query_param_uint64 (&serial_id),
GNUNET_PQ_query_param_end
};
struct RecoupSerialContext psc = {
.cb = cb,
.cb_cls = cb_cls,
.pg = pg,
.status = GNUNET_OK
};
enum GNUNET_DB_QueryStatus qs;
/* Used in #postgres_select_recoup_above_serial_id() to obtain recoup transactions */
PREPARE (pg,
"recoup_get_incr",
"SELECT"
" recoup_uuid"
",recoup_timestamp"
",reserves.reserve_pub"
",coins.coin_pub"
",coin_sig"
",coin_blind"
",ro.h_blind_ev"
",denoms.denom_pub_hash"
",coins.denom_sig"
",coins.age_commitment_hash"
",denoms.denom_pub"
",amount_val"
",amount_frac"
" FROM recoup"
" JOIN known_coins coins"
" USING (coin_pub)"
" JOIN reserves_out ro"
" USING (reserve_out_serial_id)"
" JOIN reserves"
" USING (reserve_uuid)"
" JOIN denominations denoms"
" ON (coins.denominations_serial = denoms.denominations_serial)"
" WHERE recoup_uuid>=$1"
" ORDER BY recoup_uuid ASC;");
qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
"recoup_get_incr",
params,
&recoup_serial_helper_cb,
&psc);
if (GNUNET_OK != psc.status)
return GNUNET_DB_STATUS_HARD_ERROR;
return qs;
}
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