/*
   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 src/include/exchange-database/iterate_auditor_denominations.h
 * @brief implementation of the iterate_auditor_denominations function for Postgres
 * @author Christian Grothoff
 */
#ifndef EXCHANGE_DATABASE_ITERATE_AUDITOR_DENOMINATIONS_H
#define EXCHANGE_DATABASE_ITERATE_AUDITOR_DENOMINATIONS_H

#include "taler/taler_json_lib.h"
#include "exchangedb_lib.h"


/**
 * Function called with information about the denominations
 * audited by the exchange's auditors.
 *
 * @param cls closure with a `struct TEH_KeyStateHandle *`
 * @param auditor_pub the public key of an auditor
 * @param h_denom_pub hash of a denomination key audited by this auditor
 * @param auditor_sig signature from the auditor affirming this
 */
#ifndef TALER_EXCHANGEDB_AUDITOR_DENOMINATIONS_RESULT_CLOSURE
/**
 * Type of the closure for #TALER_EXCHANGEDB_AuditorDenominationsCallback.
 */
#define TALER_EXCHANGEDB_AUDITOR_DENOMINATIONS_RESULT_CLOSURE void
#endif
typedef void
(*TALER_EXCHANGEDB_AuditorDenominationsCallback)(
  TALER_EXCHANGEDB_AUDITOR_DENOMINATIONS_RESULT_CLOSURE *cls,
  const struct TALER_AuditorPublicKeyP *auditor_pub,
  const struct TALER_DenominationHashP *h_denom_pub,
  const struct TALER_AuditorSignatureP *auditor_sig);


/* Callback typedefs */
/**
 * Function called with information about the denominations
 * audited by the exchange's auditors.
 *
 * @param cls closure with a `struct TEH_KeyStateHandle *`
 * @param auditor_pub the public key of an auditor
 * @param h_denom_pub hash of a denomination key audited by this auditor
 * @param auditor_sig signature from the auditor affirming this
 */
typedef void
(*TALER_EXCHANGEDB_AuditorDenominationsCallback)(
  TALER_EXCHANGEDB_AUDITOR_DENOMINATIONS_RESULT_CLOSURE *cls,
  const struct TALER_AuditorPublicKeyP *auditor_pub,
  const struct TALER_DenominationHashP *h_denom_pub,
  const struct TALER_AuditorSignatureP *auditor_sig);

/**
 * Function called to invoke @a cb on every denomination with an active
 * auditor. Disabled auditors and denominations without auditor are
 * skipped. Runs in its own read-only transaction.
 *
 * @param pg the database context
 * @param cb function to call on each active auditor
 * @param cb_cls closure for @a cb
 * @return transaction status code
 */
enum GNUNET_DB_QueryStatus
TALER_EXCHANGEDB_iterate_auditor_denominations (struct
                                                TALER_EXCHANGEDB_PostgresContext
                                                *pg
                                                ,
                                                TALER_EXCHANGEDB_AuditorDenominationsCallback
                                                cb,
                                                TALER_EXCHANGEDB_AUDITOR_DENOMINATIONS_RESULT_CLOSURE
                                                *cb_cls);

#endif
