diff options
Diffstat (limited to 'src/exchangedb/pg_select_reserve_open_above_serial_id.c')
| -rw-r--r-- | src/exchangedb/pg_select_reserve_open_above_serial_id.c | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/src/exchangedb/pg_select_reserve_open_above_serial_id.c b/src/exchangedb/pg_select_reserve_open_above_serial_id.c new file mode 100644 index 000000000..1675e71a7 --- /dev/null +++ b/src/exchangedb/pg_select_reserve_open_above_serial_id.c @@ -0,0 +1,168 @@ +/* + 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 pg_select_reserve_open_above_serial_id.c + * @brief Low-level (statement-level) Postgres database access for the exchange + * @author Christian Grothoff + */ +#include "platform.h" +#include "taler_error_codes.h" +#include "taler_dbevents.h" +#include "taler_pq_lib.h" +#include "pg_select_reserve_open_above_serial_id.h" +#include "plugin_exchangedb_common.h" +#include "pg_helper.h" + + +/** + * Closure for #reserve_open_serial_helper_cb(). + */ +struct ReserveOpenSerialContext +{ + + /** + * Callback to call. + */ + TALER_EXCHANGEDB_ReserveOpenCallback cb; + + /** + * Closure for @e cb. + */ + void *cb_cls; + + /** + * Plugin's context. + */ + struct PostgresClosure *pg; + + /** + * Status code, set to #GNUNET_SYSERR on hard errors. + */ + enum GNUNET_GenericReturnValue status; +}; + + +/** + * Helper function to be called with the results of a SELECT statement + * that has returned @a num_results results. + * + * @param cls closure of type `struct ReserveOpenSerialContext` + * @param result the postgres result + * @param num_results the number of results in @a result + */ +static void +reserve_open_serial_helper_cb (void *cls, + PGresult *result, + unsigned int num_results) +{ + struct ReserveOpenSerialContext *rcsc = cls; + struct PostgresClosure *pg = rcsc->pg; + + for (unsigned int i = 0; i<num_results; i++) + { + uint64_t rowid; + struct TALER_ReservePublicKeyP reserve_pub; + struct TALER_ReserveSignatureP reserve_sig; + uint32_t requested_purse_limit; + struct GNUNET_TIME_Timestamp request_timestamp; + struct GNUNET_TIME_Timestamp reserve_expiration; + struct TALER_Amount reserve_payment; + struct GNUNET_PQ_ResultSpec rs[] = { + GNUNET_PQ_result_spec_uint64 ("open_request_uuid", + &rowid), + GNUNET_PQ_result_spec_auto_from_type ("reserve_pub", + &reserve_pub), + GNUNET_PQ_result_spec_auto_from_type ("reserve_sig", + &reserve_sig), + GNUNET_PQ_result_spec_timestamp ("request_timestamp", + &request_timestamp), + GNUNET_PQ_result_spec_timestamp ("expiration_date", + &reserve_expiration), + GNUNET_PQ_result_spec_uint32 ("requested_purse_limit", + &requested_purse_limit), + TALER_PQ_RESULT_SPEC_AMOUNT ("reserve_payment", + &reserve_payment), + GNUNET_PQ_result_spec_end + }; + enum GNUNET_GenericReturnValue ret; + + if (GNUNET_OK != + GNUNET_PQ_extract_result (result, + rs, + i)) + { + GNUNET_break (0); + rcsc->status = GNUNET_SYSERR; + return; + } + ret = rcsc->cb (rcsc->cb_cls, + rowid, + &reserve_payment, + request_timestamp, + reserve_expiration, + requested_purse_limit, + &reserve_pub, + &reserve_sig); + GNUNET_PQ_cleanup_result (rs); + if (GNUNET_OK != ret) + break; + } +} + + +enum GNUNET_DB_QueryStatus +TEH_PG_select_reserve_open_above_serial_id ( + void *cls, + uint64_t serial_id, + TALER_EXCHANGEDB_ReserveOpenCallback cb, + void *cb_cls) +{ + struct PostgresClosure *pg = cls; + struct GNUNET_PQ_QueryParam params[] = { + GNUNET_PQ_query_param_uint64 (&serial_id), + GNUNET_PQ_query_param_end + }; + struct ReserveOpenSerialContext rcsc = { + .cb = cb, + .cb_cls = cb_cls, + .pg = pg, + .status = GNUNET_OK + }; + enum GNUNET_DB_QueryStatus qs; + + PREPARE ( + pg, + "reserves_open_get_incr", + "SELECT" + " open_request_uuid" + ",reserve_pub" + ",request_timestamp" + ",expiration_date" + ",reserve_sig" + ",reserve_payment" + ",requested_purse_limit" + " FROM reserves_open_requests" + " WHERE open_request_uuid>=$1" + " ORDER BY open_request_uuid ASC;"); + qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn, + "reserves_open_get_incr", + params, + &reserve_open_serial_helper_cb, + &rcsc); + if (GNUNET_OK != rcsc.status) + return GNUNET_DB_STATUS_HARD_ERROR; + return qs; +} |