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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 backenddb/pg_lookup_reserves.c
* @brief Implementation of the lookup_reserves function for Postgres
* @author Christian Grothoff
*/
#include "platform.h"
#include <taler/taler_error_codes.h>
#include <taler/taler_dbevents.h>
#include <taler/taler_pq_lib.h>
#include "pg_lookup_reserves.h"
#include "pg_helper.h"
/**
* Closure for #lookup_reserves_cb.
*/
struct LookupReservesContext
{
/**
* Postgres context.
*/
struct PostgresClosure *pg;
/**
* Function to call with the results
*/
TALER_MERCHANTDB_ReservesCallback cb;
/**
* Closure for @e cb
*/
void *cb_cls;
/**
* Filter by active reserves.
*/
enum TALER_EXCHANGE_YesNoAll active;
/**
* Filter by failures (mismatch in exchange claimed and
* merchant claimed initial amounts).
*/
enum TALER_EXCHANGE_YesNoAll failures;
/**
* Set in case of errors.
*/
enum GNUNET_DB_QueryStatus qs;
};
/**
* 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 LookupReservesContext *`
* @param result the postgres result
* @param num_results the number of results in @a result
*/
static void
lookup_reserves_cb (void *cls,
PGresult *result,
unsigned int num_results)
{
struct LookupReservesContext *lrc = cls;
struct PostgresClosure *pg = lrc->pg;
for (unsigned int i = 0; i < num_results; i++)
{
struct TALER_ReservePublicKeyP reserve_pub;
struct GNUNET_TIME_Timestamp creation_time;
struct GNUNET_TIME_Timestamp expiration_time;
struct TALER_Amount merchant_initial_balance;
struct TALER_Amount exchange_initial_balance;
struct TALER_Amount pickup_amount;
struct TALER_Amount committed_amount;
uint8_t active;
struct GNUNET_PQ_ResultSpec rs[] = {
GNUNET_PQ_result_spec_auto_from_type ("reserve_pub",
&reserve_pub),
GNUNET_PQ_result_spec_timestamp ("creation_time",
&creation_time),
GNUNET_PQ_result_spec_timestamp ("expiration",
&expiration_time),
TALER_PQ_RESULT_SPEC_AMOUNT ("merchant_initial_balance",
&merchant_initial_balance),
TALER_PQ_RESULT_SPEC_AMOUNT ("exchange_initial_balance",
&exchange_initial_balance),
TALER_PQ_RESULT_SPEC_AMOUNT ("rewards_committed",
&committed_amount),
TALER_PQ_RESULT_SPEC_AMOUNT ("rewards_picked_up",
&pickup_amount),
GNUNET_PQ_result_spec_auto_from_type ("active",
&active),
GNUNET_PQ_result_spec_end
};
if (GNUNET_OK !=
GNUNET_PQ_extract_result (result,
rs,
i))
{
GNUNET_break (0);
lrc->qs = GNUNET_DB_STATUS_HARD_ERROR;
return;
}
switch (lrc->active)
{
case TALER_EXCHANGE_YNA_YES:
if (0 == active)
continue;
break;
case TALER_EXCHANGE_YNA_NO:
if (0 != active)
continue;
break;
case TALER_EXCHANGE_YNA_ALL:
break;
}
switch (lrc->failures)
{
case TALER_EXCHANGE_YNA_YES:
if (0 ==
TALER_amount_cmp (&merchant_initial_balance,
&exchange_initial_balance))
continue;
break;
case TALER_EXCHANGE_YNA_NO:
if (0 !=
TALER_amount_cmp (&merchant_initial_balance,
&exchange_initial_balance))
continue;
break;
case TALER_EXCHANGE_YNA_ALL:
break;
}
lrc->cb (lrc->cb_cls,
&reserve_pub,
creation_time,
expiration_time,
&merchant_initial_balance,
&exchange_initial_balance,
&pickup_amount,
&committed_amount,
(0 != active));
}
}
enum GNUNET_DB_QueryStatus
TMH_PG_lookup_reserves (void *cls,
const char *instance_id,
struct GNUNET_TIME_Timestamp created_after,
enum TALER_EXCHANGE_YesNoAll active,
enum TALER_EXCHANGE_YesNoAll failures,
TALER_MERCHANTDB_ReservesCallback cb,
void *cb_cls)
{
struct PostgresClosure *pg = cls;
struct LookupReservesContext lrc = {
.pg = pg,
.active = active,
.failures = failures,
.cb = cb,
.cb_cls = cb_cls
};
struct GNUNET_PQ_QueryParam params[] = {
GNUNET_PQ_query_param_string (instance_id),
GNUNET_PQ_query_param_timestamp (&created_after),
GNUNET_PQ_query_param_end
};
enum GNUNET_DB_QueryStatus qs;
check_connection (pg);
PREPARE (pg,
"lookup_reserves",
"SELECT"
" reserve_pub"
",creation_time"
",expiration"
",merchant_initial_balance_val"
",merchant_initial_balance_frac"
",exchange_initial_balance_val"
",exchange_initial_balance_frac"
",rewards_committed_val"
",rewards_committed_frac"
",rewards_picked_up_val"
",rewards_picked_up_frac"
",reserve_priv IS NOT NULL AS active"
" FROM merchant_reward_reserves"
" FULL OUTER JOIN merchant_reward_reserve_keys USING (reserve_serial)"
" WHERE creation_time > $2"
" AND merchant_serial ="
" (SELECT merchant_serial"
" FROM merchant_instances"
" WHERE merchant_id=$1)");
qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
"lookup_reserves",
params,
&lookup_reserves_cb,
&lrc);
if (lrc.qs < 0)
return lrc.qs;
return qs;
}
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