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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_add_policy_fulfillment_proof.c
* @brief Implementation of the add_policy_fulfillment_proof 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_add_policy_fulfillment_proof.h"
#include "pg_helper.h"
/**
* Compares two indices into an array of hash codes according to
* GNUNET_CRYPTO_hash_cmp of the content at those index positions.
*
* Used in a call qsort_t in order to generate sorted policy_hash_codes.
*/
static int
hash_code_cmp (
const void *hc1,
const void *hc2,
void *arg)
{
size_t i1 = *(size_t *) hc1;
size_t i2 = *(size_t *) hc2;
const struct TALER_PolicyDetails *d = arg;
return GNUNET_CRYPTO_hash_cmp (&d[i1].hash_code,
&d[i2].hash_code);
}
enum GNUNET_DB_QueryStatus
TEH_PG_add_policy_fulfillment_proof (
void *cls,
struct TALER_PolicyFulfillmentTransactionData *fulfillment)
{
enum GNUNET_DB_QueryStatus qs;
struct PostgresClosure *pg = cls;
size_t count = fulfillment->details_count;
/* FIXME: this seems to be prone to VLA attacks */
struct GNUNET_HashCode hcs[count];
/* Create the sorted policy_hash_codes */
{
size_t idx[count];
for (size_t i = 0; i < count; i++)
idx[i] = i;
/* Sort the indices according to the hash codes of the corresponding
* details. */
qsort_r (idx,
count,
sizeof(size_t),
hash_code_cmp,
fulfillment->details);
/* Finally, concatenate all hash_codes in sorted order */
for (size_t i = 0; i < count; i++)
hcs[i] = fulfillment->details[idx[i]].hash_code;
}
/* Now, add the proof to the policy_fulfillments table, retrieve the
* record_id */
{
struct GNUNET_PQ_QueryParam params[] = {
GNUNET_PQ_query_param_timestamp (&fulfillment->timestamp),
TALER_PQ_query_param_json (fulfillment->proof),
GNUNET_PQ_query_param_auto_from_type (&fulfillment->h_proof),
TALER_PQ_query_param_array_hash_code (count, hcs, pg->conn),
GNUNET_PQ_query_param_end
};
struct GNUNET_PQ_ResultSpec rs[] = {
GNUNET_PQ_result_spec_uint64 ("fulfillment_id",
&fulfillment->fulfillment_id),
GNUNET_PQ_result_spec_end
};
PREPARE (pg,
"insert_proof_into_policy_fulfillments",
"INSERT INTO policy_fulfillments"
"(fulfillment_timestamp"
",fulfillment_proof"
",h_fulfillment_proof"
",policy_hash_codes"
") VALUES ($1, $2, $3, $4)"
" ON CONFLICT DO NOTHING;");
qs = GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
"insert_proof_into_policy_fulfillments",
params,
rs);
if (GNUNET_DB_STATUS_SUCCESS_ONE_RESULT != qs)
return qs;
}
/* Now, set the states of each entry corresponding to the hash_codes in
* policy_details accordingly */
for (size_t i = 0; i < count; i++)
{
struct TALER_PolicyDetails *pos = &fulfillment->details[i];
{
struct GNUNET_PQ_QueryParam params[] = {
GNUNET_PQ_query_param_auto_from_type (&pos->hash_code),
GNUNET_PQ_query_param_timestamp (&pos->deadline),
TALER_PQ_query_param_amount (pg->conn,
&pos->commitment),
TALER_PQ_query_param_amount (pg->conn,
&pos->accumulated_total),
TALER_PQ_query_param_amount (pg->conn,
&pos->policy_fee),
TALER_PQ_query_param_amount (pg->conn,
&pos->transferable_amount),
GNUNET_PQ_query_param_auto_from_type (&pos->fulfillment_state),
GNUNET_PQ_query_param_end
};
PREPARE (pg,
"update_policy_details",
"UPDATE policy_details SET"
" deadline=$2"
",commitment=$3"
",accumulated_total=$4"
",fee=$5"
",transferable=$6"
",fulfillment_state=$7"
" WHERE policy_hash_code=$1;");
qs = GNUNET_PQ_eval_prepared_non_select (pg->conn,
"update_policy_details",
params);
if (qs < 0)
return qs;
}
}
/*
* FIXME[oec]-#7999: When all policies of a deposit are fulfilled,
* unblock it and trigger a wire-transfer.
*/
return qs;
}
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