/*
   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/merchant-database/iterate_refunds.h
 * @brief implementation of the iterate_refunds function for Postgres
 * @author Iván Ávalos
 */
#ifndef MERCHANT_DATABASE_ITERATE_REFUNDS_H
#define MERCHANT_DATABASE_ITERATE_REFUNDS_H

#include <taler/taler_util.h>
#include <taler/taler_json_lib.h>
#include "merchantdb_lib.h"


struct TALER_MERCHANTDB_PostgresContext;
/* Callback typedefs */
/**
 * Function called with information about a refund.
 *
 * @param cls closure
 * @param coin_pub public coin from which the refund comes from
 * @param refund_amount refund amount which is being taken from @a coin_pub
 */
typedef void
(*TALER_MERCHANTDB_RefundCallback)(
  void *cls,
  const struct TALER_CoinSpendPublicKeyP *coin_pub,
  const struct TALER_Amount *refund_amount);

/**
 * Obtain refunds associated with a contract.
 *
 * @param pg database context
 * @param instance_id instance to lookup refunds for
 * @param h_contract_terms hash code of the contract
 * @param rc function to call for each coin on which there is a refund
 * @param rc_cls closure for @a rc
 * @return transaction status
 */
enum GNUNET_DB_QueryStatus
TALER_MERCHANTDB_iterate_refunds (struct TALER_MERCHANTDB_PostgresContext *pg,
                                  const char *instance_id,
                                  const struct TALER_PrivateContractHashP *h_contract_terms,
                                  TALER_MERCHANTDB_RefundCallback rc,
                                  void *rc_cls);

#endif
