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/*
This file is part of TALER
Copyright (C) 2022, 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 exchangedb/pg_aggregate.c
* @brief Implementation of the aggregate 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_aggregate.h"
#include "pg_helper.h"
enum GNUNET_DB_QueryStatus
TEH_PG_aggregate (
void *cls,
const struct TALER_PaytoHashP *h_payto,
const struct TALER_MerchantPublicKeyP *merchant_pub,
const struct TALER_WireTransferIdentifierRawP *wtid,
struct TALER_Amount *total)
{
struct PostgresClosure *pg = cls;
struct GNUNET_TIME_Absolute now = {0};
struct GNUNET_PQ_QueryParam params[] = {
GNUNET_PQ_query_param_absolute_time (&now),
GNUNET_PQ_query_param_auto_from_type (merchant_pub),
GNUNET_PQ_query_param_auto_from_type (h_payto),
GNUNET_PQ_query_param_auto_from_type (wtid),
GNUNET_PQ_query_param_end
};
uint64_t sum_deposit_value;
uint64_t sum_deposit_frac;
uint64_t sum_refund_value;
uint64_t sum_refund_frac;
uint64_t sum_fee_value;
uint64_t sum_fee_frac;
struct GNUNET_PQ_ResultSpec rs[] = {
GNUNET_PQ_result_spec_uint64 ("sum_deposit_value",
&sum_deposit_value),
GNUNET_PQ_result_spec_uint64 ("sum_deposit_fraction",
&sum_deposit_frac),
GNUNET_PQ_result_spec_uint64 ("sum_refund_value",
&sum_refund_value),
GNUNET_PQ_result_spec_uint64 ("sum_refund_fraction",
&sum_refund_frac),
GNUNET_PQ_result_spec_uint64 ("sum_fee_value",
&sum_fee_value),
GNUNET_PQ_result_spec_uint64 ("sum_fee_fraction",
&sum_fee_frac),
GNUNET_PQ_result_spec_end
};
enum GNUNET_DB_QueryStatus qs;
struct TALER_Amount sum_deposit;
struct TALER_Amount sum_refund;
struct TALER_Amount sum_fee;
struct TALER_Amount delta;
now = GNUNET_TIME_absolute_round_down (GNUNET_TIME_absolute_get (),
pg->aggregator_shift);
/* Used in #postgres_aggregate() */
PREPARE (pg,
"aggregate",
"WITH dep AS (" /* restrict to our merchant and account and mark as done */
" UPDATE deposits"
" SET done=TRUE"
" WHERE NOT (done OR policy_blocked)" /* only actually executable deposits */
" AND refund_deadline<$1" /* filter by shard */
" AND merchant_pub=$2" /* filter by target merchant */
" AND wire_target_h_payto=$3" /* merchant could have a 2nd bank account */
" RETURNING"
" deposit_serial_id"
" ,coin_pub"
" ,amount_with_fee_val AS amount_val"
" ,amount_with_fee_frac AS amount_frac)"
" ,ref AS (" /* find applicable refunds -- NOTE: may do a full join on the master, maybe find a left-join way to integrate with query above to push it to the shards? */
" SELECT"
" amount_with_fee_val AS refund_val"
" ,amount_with_fee_frac AS refund_frac"
" ,coin_pub"
" ,deposit_serial_id" /* theoretically, coin could be in multiple refunded transactions */
" FROM refunds"
" WHERE coin_pub IN (SELECT coin_pub FROM dep)"
" AND deposit_serial_id IN (SELECT deposit_serial_id FROM dep))"
" ,ref_by_coin AS (" /* total up refunds by coin */
" SELECT"
" SUM(refund_val) AS sum_refund_val"
" ,SUM(refund_frac) AS sum_refund_frac"
" ,coin_pub"
" ,deposit_serial_id" /* theoretically, coin could be in multiple refunded transactions */
" FROM ref"
" GROUP BY coin_pub, deposit_serial_id)"
" ,norm_ref_by_coin AS (" /* normalize */
" SELECT"
" sum_refund_val + sum_refund_frac / 100000000 AS norm_refund_val"
" ,sum_refund_frac % 100000000 AS norm_refund_frac"
" ,coin_pub"
" ,deposit_serial_id" /* theoretically, coin could be in multiple refunded transactions */
" FROM ref_by_coin)"
" ,fully_refunded_coins AS (" /* find applicable refunds -- NOTE: may do a full join on the master, maybe find a left-join way to integrate with query above to push it to the shards? */
" SELECT"
" dep.coin_pub"
" FROM norm_ref_by_coin norm"
" JOIN dep"
" ON (norm.coin_pub = dep.coin_pub"
" AND norm.deposit_serial_id = dep.deposit_Serial_id"
" AND norm.norm_refund_val = dep.amount_val"
" AND norm.norm_refund_frac = dep.amount_frac))"
" ,fees AS (" /* find deposit fees for not fully refunded deposits */
" SELECT"
" denom.fee_deposit_val AS fee_val"
" ,denom.fee_deposit_frac AS fee_frac"
" ,cs.deposit_serial_id" /* ensures we get the fee for each coin, not once per denomination */
" FROM dep cs"
" JOIN known_coins kc" /* NOTE: may do a full join on the master, maybe find a left-join way to integrate with query above to push it to the shards? */
" USING (coin_pub)"
" JOIN denominations denom"
" USING (denominations_serial)"
" WHERE coin_pub NOT IN (SELECT coin_pub FROM fully_refunded_coins))"
" ,dummy AS (" /* add deposits to aggregation_tracking */
" INSERT INTO aggregation_tracking"
" (deposit_serial_id"
" ,wtid_raw)"
" SELECT deposit_serial_id,$4"
" FROM dep)"
"SELECT" /* calculate totals (deposits, refunds and fees) */
" CAST(COALESCE(SUM(dep.amount_val),0) AS INT8) AS sum_deposit_value" /* cast needed, otherwise we get NUMBER */
" ,COALESCE(SUM(dep.amount_frac),0) AS sum_deposit_fraction" /* SUM over INT returns INT8 */
" ,CAST(COALESCE(SUM(ref.refund_val),0) AS INT8) AS sum_refund_value"
" ,COALESCE(SUM(ref.refund_frac),0) AS sum_refund_fraction"
" ,CAST(COALESCE(SUM(fees.fee_val),0) AS INT8) AS sum_fee_value"
" ,COALESCE(SUM(fees.fee_frac),0) AS sum_fee_fraction"
" FROM dep "
" FULL OUTER JOIN ref ON (FALSE)" /* We just want all sums */
" FULL OUTER JOIN fees ON (FALSE);");
qs = GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
"aggregate",
params,
rs);
if (qs < 0)
{
GNUNET_break (GNUNET_DB_STATUS_SOFT_ERROR == qs);
return qs;
}
if (GNUNET_DB_STATUS_SUCCESS_NO_RESULTS == qs)
{
GNUNET_assert (GNUNET_OK ==
TALER_amount_set_zero (pg->currency,
total));
return qs;
}
GNUNET_assert (GNUNET_OK ==
TALER_amount_set_zero (pg->currency,
&sum_deposit));
GNUNET_assert (GNUNET_OK ==
TALER_amount_set_zero (pg->currency,
&sum_refund));
GNUNET_assert (GNUNET_OK ==
TALER_amount_set_zero (pg->currency,
&sum_fee));
sum_deposit.value = sum_deposit_frac / TALER_AMOUNT_FRAC_BASE
+ sum_deposit_value;
sum_deposit.fraction = sum_deposit_frac % TALER_AMOUNT_FRAC_BASE;
sum_refund.value = sum_refund_frac / TALER_AMOUNT_FRAC_BASE
+ sum_refund_value;
sum_refund.fraction = sum_refund_frac % TALER_AMOUNT_FRAC_BASE;
sum_fee.value = sum_fee_frac / TALER_AMOUNT_FRAC_BASE
+ sum_fee_value;
sum_fee.fraction = sum_fee_frac % TALER_AMOUNT_FRAC_BASE; \
GNUNET_assert (0 <=
TALER_amount_subtract (&delta,
&sum_deposit,
&sum_refund));
GNUNET_assert (0 <=
TALER_amount_subtract (total,
&delta,
&sum_fee));
return qs;
}
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