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/*
This file is part of TALER
Copyright (C) 2023 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 backenddb/pg_lookup_pickup.c
* @brief Implementation of the lookup_pickup function for Postgres
* @author Iván Ávalos
*/
#include "platform.h"
#include <taler/taler_error_codes.h>
#include <taler/taler_dbevents.h>
#include <taler/taler_pq_lib.h>
#include "pg_lookup_pickup.h"
#include "pg_helper.h"
/**
* Closure for #lookup_signatures_cb().
*/
struct LookupSignaturesContext
{
/**
* Length of the @e sigs array
*/
unsigned int sigs_length;
/**
* Where to store the signatures.
*/
struct TALER_BlindedDenominationSignature *sigs;
};
/**
* Function to be called with the results of a SELECT statement
* that has returned @a num_results results about accounts.
*
* @param[in,out] cls of type `struct LookupSignaturesContext *`
* @param result the postgres result
* @param num_results the number of results in @a result
*/
static void
lookup_signatures_cb (void *cls,
PGresult *result,
unsigned int num_results)
{
struct LookupSignaturesContext *lsc = cls;
for (unsigned int i = 0; i < num_results; i++)
{
uint32_t offset;
struct TALER_BlindedDenominationSignature bsig;
struct GNUNET_PQ_ResultSpec rs[] = {
GNUNET_PQ_result_spec_uint32 ("coin_offset",
&offset),
TALER_PQ_result_spec_blinded_denom_sig ("blind_sig",
&bsig),
GNUNET_PQ_result_spec_end
};
if (GNUNET_OK !=
GNUNET_PQ_extract_result (result,
rs,
i))
{
GNUNET_break (0);
return;
}
if (offset >= lsc->sigs_length)
{
GNUNET_break_op (0);
GNUNET_PQ_cleanup_result (rs);
continue;
}
/* Must be NULL due to UNIQUE constraint on offset and
requirement that client launched us with 'sigs'
pre-initialized to NULL. */
lsc->sigs[offset] = bsig;
}
}
enum GNUNET_DB_QueryStatus
TMH_PG_lookup_pickup (void *cls,
const char *instance_id,
const struct TALER_RewardIdentifierP *reward_id,
const struct TALER_PickupIdentifierP *pickup_id,
char **exchange_url,
struct TALER_ReservePrivateKeyP *reserve_priv,
unsigned int sigs_length,
struct TALER_BlindedDenominationSignature sigs[])
{
struct PostgresClosure *pg = cls;
uint64_t pickup_serial;
{
struct GNUNET_PQ_QueryParam params[] = {
GNUNET_PQ_query_param_string (instance_id),
GNUNET_PQ_query_param_auto_from_type (reward_id),
GNUNET_PQ_query_param_auto_from_type (pickup_id),
GNUNET_PQ_query_param_end
};
struct GNUNET_PQ_ResultSpec rs[] = {
GNUNET_PQ_result_spec_string ("exchange_url",
exchange_url),
GNUNET_PQ_result_spec_auto_from_type ("reserve_priv",
reserve_priv),
GNUNET_PQ_result_spec_uint64 ("pickup_serial",
&pickup_serial),
GNUNET_PQ_result_spec_end
};
enum GNUNET_DB_QueryStatus qs;
check_connection (pg);
PREPARE (pg,
"lookup_pickup",
"SELECT"
" exchange_url"
",reserve_priv"
",pickup_serial"
" FROM merchant_reward_pickups"
" JOIN merchant_rewards USING (reward_serial)"
" JOIN merchant_reward_reserves USING (reserve_serial)"
" JOIN merchant_reward_reserve_keys USING (reserve_serial)"
" WHERE pickup_id = $3"
" AND reward_id = $2"
" AND merchant_serial ="
" (SELECT merchant_serial"
" FROM merchant_instances"
" WHERE merchant_id=$1)");
qs = GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
"lookup_pickup",
params,
rs);
if (qs <= 0)
return qs;
}
{
struct GNUNET_PQ_QueryParam params[] = {
GNUNET_PQ_query_param_uint64 (&pickup_serial),
GNUNET_PQ_query_param_end
};
struct LookupSignaturesContext lsc = {
.sigs_length = sigs_length,
.sigs = sigs
};
PREPARE (pg,
"lookup_pickup_signatures",
"SELECT"
" coin_offset"
",blind_sig"
" FROM merchant_reward_pickup_signatures"
" WHERE pickup_serial = $1");
return GNUNET_PQ_eval_prepared_multi_select (pg->conn,
"lookup_pickup_signatures",
params,
&lookup_signatures_cb,
&lsc);
}
}
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