select_exchanges.h (2164B)
1 /* 2 This file is part of TALER 3 Copyright (C) 2026 Taler Systems SA 4 5 TALER is free software; you can redistribute it and/or modify it under the 6 terms of the GNU General Public License as published by the Free Software 7 Foundation; either version 3, or (at your option) any later version. 8 9 TALER is distributed in the hope that it will be useful, but WITHOUT ANY 10 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR 11 A PARTICULAR PURPOSE. See the GNU General Public License for more details. 12 13 You should have received a copy of the GNU General Public License along with 14 TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/> 15 */ 16 /** 17 * @file src/include/merchant-database/select_exchanges.h 18 * @brief implementation of the select_exchanges function for Postgres 19 * @author Christian Grothoff 20 */ 21 #ifndef MERCHANT_DATABASE_SELECT_EXCHANGES_H 22 #define MERCHANT_DATABASE_SELECT_EXCHANGES_H 23 24 #include <taler/taler_util.h> 25 #include <taler/taler_json_lib.h> 26 #include "merchantdb_lib.h" 27 28 29 /** 30 * Function called about the ``/keys`` status of every exchange 31 * we are working with. 32 * 33 * @param cls closure 34 * @param exchange_url base URL of the exchange 35 * @param keys keys of the exchange, NULL if we do not have any yet 36 * @param next_download when will be the next download 37 * @param keys_expiration when does the current ``/keys`` response expire 38 * @param http_status last HTTP status from ``/keys`` 39 * @param ec last error code from fetching ``/keys`` 40 */ 41 typedef void 42 (*TALER_MERCHANTDB_ExchangesCallback)( 43 void *cls, 44 const char *exchange_url, 45 const json_t *keys, 46 struct GNUNET_TIME_Absolute next_download, 47 struct GNUNET_TIME_Absolute keys_expiration, 48 unsigned int http_status, 49 enum TALER_ErrorCode ec); 50 51 52 /** 53 * Call @a cb on each exchange we have in the database. 54 * 55 * @param pg database context 56 * @param cb callback to invoke 57 * @param cb_cls closure for @a cb 58 * @return transaction status code 59 */ 60 enum GNUNET_DB_QueryStatus 61 TALER_MERCHANTDB_select_exchanges ( 62 struct TALER_MERCHANTDB_PostgresContext *pg, 63 TALER_MERCHANTDB_ExchangesCallback cb, 64 void *cb_cls); 65 66 67 #endif