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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_refunds_above_serial_id.c
* @brief Implementation of the select_refunds_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_refunds_above_serial_id.h"
#include "pg_helper.h"
/**
* Closure for #refunds_serial_helper_cb().
*/
struct RefundsSerialContext
{
/**
* Callback to call.
*/
TALER_EXCHANGEDB_RefundCallback 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 RefundsSerialContext`
* @param result the postgres result
* @param num_results the number of results in @a result
*/
static void
refunds_serial_helper_cb (void *cls,
PGresult *result,
unsigned int num_results)
{
struct RefundsSerialContext *rsc = cls;
struct PostgresClosure *pg = rsc->pg;
for (unsigned int i = 0; i<num_results; i++)
{
struct TALER_EXCHANGEDB_Refund refund;
struct TALER_DenominationPublicKey denom_pub;
uint64_t rowid;
bool full_refund;
struct GNUNET_PQ_ResultSpec rs[] = {
GNUNET_PQ_result_spec_auto_from_type ("merchant_pub",
&refund.details.merchant_pub),
GNUNET_PQ_result_spec_auto_from_type ("merchant_sig",
&refund.details.merchant_sig),
GNUNET_PQ_result_spec_auto_from_type ("h_contract_terms",
&refund.details.h_contract_terms),
GNUNET_PQ_result_spec_uint64 ("rtransaction_id",
&refund.details.rtransaction_id),
TALER_PQ_result_spec_denom_pub ("denom_pub",
&denom_pub),
GNUNET_PQ_result_spec_auto_from_type ("coin_pub",
&refund.coin.coin_pub),
TALER_PQ_RESULT_SPEC_AMOUNT ("amount_with_fee",
&refund.details.refund_amount),
GNUNET_PQ_result_spec_uint64 ("refund_serial_id",
&rowid),
GNUNET_PQ_result_spec_end
};
enum GNUNET_GenericReturnValue ret;
if (GNUNET_OK !=
GNUNET_PQ_extract_result (result,
rs,
i))
{
GNUNET_break (0);
rsc->status = GNUNET_SYSERR;
return;
}
{
struct GNUNET_PQ_QueryParam params[] = {
GNUNET_PQ_query_param_uint64 (&rowid),
GNUNET_PQ_query_param_end
};
struct TALER_Amount amount_with_fee;
uint64_t s_f;
uint64_t s_v;
struct GNUNET_PQ_ResultSpec rs2[] = {
GNUNET_PQ_result_spec_uint64 ("s_v",
&s_v),
GNUNET_PQ_result_spec_uint64 ("s_f",
&s_f),
TALER_PQ_RESULT_SPEC_AMOUNT ("amount_with_fee",
&amount_with_fee),
GNUNET_PQ_result_spec_end
};
enum GNUNET_DB_QueryStatus qs;
qs = GNUNET_PQ_eval_prepared_singleton_select (
pg->conn,
"test_refund_full",
params,
rs2);
if (qs <= 0)
{
GNUNET_break (0);
rsc->status = GNUNET_SYSERR;
return;
}
/* normalize */
s_v += s_f / TALER_AMOUNT_FRAC_BASE;
s_f %= TALER_AMOUNT_FRAC_BASE;
full_refund = (s_v >= amount_with_fee.value) &&
(s_f >= amount_with_fee.fraction);
}
ret = rsc->cb (rsc->cb_cls,
rowid,
&denom_pub,
&refund.coin.coin_pub,
&refund.details.merchant_pub,
&refund.details.merchant_sig,
&refund.details.h_contract_terms,
refund.details.rtransaction_id,
full_refund,
&refund.details.refund_amount);
GNUNET_PQ_cleanup_result (rs);
if (GNUNET_OK != ret)
break;
}
}
enum GNUNET_DB_QueryStatus
TEH_PG_select_refunds_above_serial_id (
void *cls,
uint64_t serial_id,
TALER_EXCHANGEDB_RefundCallback 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 RefundsSerialContext rsc = {
.cb = cb,
.cb_cls = cb_cls,
.pg = pg,
.status = GNUNET_OK
};
enum GNUNET_DB_QueryStatus qs;
/* Fetch refunds with rowid '\geq' the given parameter */
PREPARE (pg,
"audit_get_refunds_incr",
"SELECT"
" bdep.merchant_pub"
",ref.merchant_sig"
",bdep.h_contract_terms"
",ref.rtransaction_id"
",denom.denom_pub"
",kc.coin_pub"
",ref.amount_with_fee"
",ref.refund_serial_id"
" FROM refunds ref"
" JOIN batch_deposits bdep"
" ON (ref.batch_deposit_serial_id=bdep.batch_deposit_serial_id)"
" JOIN coin_deposits cdep"
" ON (ref.coin_pub=cdep.coin_pub AND ref.batch_deposit_serial_id=cdep.batch_deposit_serial_id)"
" JOIN known_coins kc"
" ON (cdep.coin_pub=kc.coin_pub)"
" JOIN denominations denom"
" ON (kc.denominations_serial=denom.denominations_serial)"
" WHERE ref.refund_serial_id>=$1"
" ORDER BY ref.refund_serial_id ASC;");
PREPARE (pg,
"test_refund_full",
"SELECT"
" CAST(SUM(CAST((ref.amount_with_fee).frac AS INT8)) AS INT8) AS s_f"
",CAST(SUM((ref.amount_with_fee).val) AS INT8) AS s_v"
",cdep.amount_with_fee"
" FROM refunds ref"
" JOIN coin_deposits cdep"
" ON (ref.coin_pub=cdep.coin_pub AND ref.batch_deposit_serial_id=cdep.batch_deposit_serial_id)"
" WHERE ref.refund_serial_id=$1"
" GROUP BY (cdep.amount_with_fee);");
qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
"audit_get_refunds_incr",
params,
&refunds_serial_helper_cb,
&rsc);
if (GNUNET_OK != rsc.status)
return GNUNET_DB_STATUS_HARD_ERROR;
return qs;
}
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