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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_iterate_denomination_info.c
* @brief Implementation of the iterate_denomination_info 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_iterate_denomination_info.h"
#include "pg_helper.h"
/**
* Closure for #domination_cb_helper()
*/
struct DenomIteratorContext
{
/**
* Function to call with the results.
*/
TALER_EXCHANGEDB_DenominationCallback cb;
/**
* Closure to pass to @e cb
*/
void *cb_cls;
/**
* Plugin context.
*/
struct PostgresClosure *pg;
};
/**
* Helper function for #TEH_PG_iterate_denomination_info().
* Calls the callback with each denomination key.
*
* @param cls a `struct DenomIteratorContext`
* @param result db results
* @param num_results number of results in @a result
*/
static void
domination_cb_helper (void *cls,
PGresult *result,
unsigned int num_results)
{
struct DenomIteratorContext *dic = cls;
struct PostgresClosure *pg = dic->pg;
for (unsigned int i = 0; i<num_results; i++)
{
struct TALER_EXCHANGEDB_DenominationKeyInformation issue;
struct TALER_DenominationPublicKey denom_pub;
struct TALER_DenominationHashP denom_hash;
struct GNUNET_PQ_ResultSpec rs[] = {
GNUNET_PQ_result_spec_auto_from_type ("master_sig",
&issue.signature),
GNUNET_PQ_result_spec_auto_from_type ("denom_pub_hash",
&denom_hash),
GNUNET_PQ_result_spec_timestamp ("valid_from",
&issue.start),
GNUNET_PQ_result_spec_timestamp ("expire_withdraw",
&issue.expire_withdraw),
GNUNET_PQ_result_spec_timestamp ("expire_deposit",
&issue.expire_deposit),
GNUNET_PQ_result_spec_timestamp ("expire_legal",
&issue.expire_legal),
TALER_PQ_RESULT_SPEC_AMOUNT ("coin",
&issue.value),
TALER_PQ_RESULT_SPEC_AMOUNT ("fee_withdraw",
&issue.fees.withdraw),
TALER_PQ_RESULT_SPEC_AMOUNT ("fee_deposit",
&issue.fees.deposit),
TALER_PQ_RESULT_SPEC_AMOUNT ("fee_refresh",
&issue.fees.refresh),
TALER_PQ_RESULT_SPEC_AMOUNT ("fee_refund",
&issue.fees.refund),
TALER_PQ_result_spec_denom_pub ("denom_pub",
&denom_pub),
GNUNET_PQ_result_spec_uint32 ("age_mask",
&issue.age_mask.bits),
GNUNET_PQ_result_spec_end
};
if (GNUNET_OK !=
GNUNET_PQ_extract_result (result,
rs,
i))
{
GNUNET_break (0);
return;
}
/* Unfortunately we have to carry the age mask in both, the
* TALER_DenominationPublicKey and
* TALER_EXCHANGEDB_DenominationKeyInformation at different times.
* Here we use _both_ so let's make sure the values are the same. */
denom_pub.age_mask = issue.age_mask;
TALER_denom_pub_hash (&denom_pub,
&issue.denom_hash);
if (0 !=
GNUNET_memcmp (&issue.denom_hash,
&denom_hash))
{
GNUNET_break (0);
}
else
{
dic->cb (dic->cb_cls,
&denom_pub,
&issue);
}
TALER_denom_pub_free (&denom_pub);
}
}
/**
* Fetch information about all known denomination keys.
*
* @param cls the @e cls of this struct with the plugin-specific state
* @param cb function to call on each denomination key
* @param cb_cls closure for @a cb
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
TEH_PG_iterate_denomination_info (void *cls,
TALER_EXCHANGEDB_DenominationCallback cb,
void *cb_cls)
{
struct PostgresClosure *pg = cls;
struct GNUNET_PQ_QueryParam params[] = {
GNUNET_PQ_query_param_end
};
struct DenomIteratorContext dic = {
.cb = cb,
.cb_cls = cb_cls,
.pg = pg
};
PREPARE (pg,
"denomination_iterate",
"SELECT"
" master_sig"
",denom_pub_hash"
",valid_from"
",expire_withdraw"
",expire_deposit"
",expire_legal"
",coin" /* value of this denom */
",fee_withdraw"
",fee_deposit"
",fee_refresh"
",fee_refund"
",denom_pub"
",age_mask"
" FROM denominations;");
return GNUNET_PQ_eval_prepared_multi_select (pg->conn,
"denomination_iterate",
params,
&domination_cb_helper,
&dic);
}
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