/*
   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_denominations.h
 * @brief implementation of the iterate_denominations function for Postgres
 * @author Christian Grothoff
 */
#ifndef EXCHANGE_DATABASE_ITERATE_DENOMINATIONS_H
#define EXCHANGE_DATABASE_ITERATE_DENOMINATIONS_H

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


/**
 * Signature of a function called with information about the exchange's
 * denomination keys.
 *
 * @param cls closure with a `struct TEH_KeyStateHandle *`
 * @param denom_pub public key of the denomination
 * @param h_denom_pub hash of @a denom_pub
 * @param meta meta data information about the denomination type (value, expirations, fees)
 * @param master_sig master signature affirming the validity of this denomination
 * @param recoup_possible true if the key was revoked and clients can currently recoup
 *        coins of this denomination
 */
#ifndef TALER_EXCHANGEDB_DENOMINATIONS_RESULT_CLOSURE
/**
 * Type of the closure for #TALER_EXCHANGEDB_DenominationsCallback.
 */
#define TALER_EXCHANGEDB_DENOMINATIONS_RESULT_CLOSURE void
#endif
typedef void
(*TALER_EXCHANGEDB_DenominationsCallback)(
  TALER_EXCHANGEDB_DENOMINATIONS_RESULT_CLOSURE *cls,
  const struct TALER_DenominationPublicKey *denom_pub,
  const struct TALER_DenominationHashP *h_denom_pub,
  const struct TALER_EXCHANGEDB_DenominationKeyMetaData *meta,
  const struct TALER_MasterSignatureP *master_sig,
  bool recoup_possible);


/**
 * Function called to invoke @a cb on every known denomination key (revoked
 * and non-revoked) that has been signed by the master key. Runs in its own
 * read-only transaction.
 *
 *
 * @param pg the database context
 * @param cb function to call on each denomination key
 * @param cb_cls closure for @a cb
 * @return transaction status code
 */
enum GNUNET_DB_QueryStatus
TALER_EXCHANGEDB_iterate_denominations (struct
                                        TALER_EXCHANGEDB_PostgresContext *pg,
                                        TALER_EXCHANGEDB_DenominationsCallback
                                        cb,
                                        TALER_EXCHANGEDB_DENOMINATIONS_RESULT_CLOSURE
                                        *cb_cls);

#endif
