diff options
Diffstat (limited to 'src/exchangedb/pg_get_unfinished_close_requests.c')
| -rw-r--r-- | src/exchangedb/pg_get_unfinished_close_requests.c | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/src/exchangedb/pg_get_unfinished_close_requests.c b/src/exchangedb/pg_get_unfinished_close_requests.c new file mode 100644 index 000000000..990e8e00e --- /dev/null +++ b/src/exchangedb/pg_get_unfinished_close_requests.c @@ -0,0 +1,166 @@ +/* + 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_get_unfinished_close_requests.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_get_unfinished_close_requests.h" +#include "pg_helper.h" + + +/** + * Closure for #reserve_close_cb(). + */ +struct CloseReserveContext +{ + /** + * Function to call for each to be closed reserve. + */ + TALER_EXCHANGEDB_ReserveExpiredCallback rec; + + /** + * Closure to give to @e rec. + */ + void *rec_cls; + + /** + * Plugin context. + */ + struct PostgresClosure *pg; + + /** + * Set to #GNUNET_SYSERR on error. + */ + enum GNUNET_GenericReturnValue status; +}; + + +/** + * Function to be called with the results of a SELECT statement + * that has returned @a num_results results. + * + * @param cls closure + * @param result the postgres result + * @param num_results the number of results in @a result + */ +static void +reserve_cb (void *cls, + PGresult *result, + unsigned int num_results) +{ + struct CloseReserveContext *erc = cls; + struct PostgresClosure *pg = erc->pg; + enum GNUNET_GenericReturnValue ret; + + ret = GNUNET_OK; + for (unsigned int i = 0; i<num_results; i++) + { + struct GNUNET_TIME_Timestamp exp_date; + char *account_details; + struct TALER_ReservePublicKeyP reserve_pub; + struct TALER_Amount remaining_balance; + uint64_t close_request_row; + struct GNUNET_PQ_ResultSpec rs[] = { + GNUNET_PQ_result_spec_timestamp ("expiration_date", + &exp_date), + GNUNET_PQ_result_spec_string ("account_details", + &account_details), + GNUNET_PQ_result_spec_auto_from_type ("reserve_pub", + &reserve_pub), + TALER_PQ_RESULT_SPEC_AMOUNT ("close", + &remaining_balance), + GNUNET_PQ_result_spec_uint64 ("close_request_serial_id", + &close_request_row), + GNUNET_PQ_result_spec_end + }; + + if (GNUNET_OK != + GNUNET_PQ_extract_result (result, + rs, + i)) + { + GNUNET_break (0); + ret = GNUNET_SYSERR; + break; + } + ret = erc->rec (erc->rec_cls, + &reserve_pub, + &remaining_balance, + account_details, + exp_date, + close_request_row); + GNUNET_PQ_cleanup_result (rs); + if (GNUNET_OK != ret) + break; + } + erc->status = ret; +} + + +enum GNUNET_DB_QueryStatus +TEH_PG_get_unfinished_close_requests ( + void *cls, + TALER_EXCHANGEDB_ReserveExpiredCallback rec, + void *rec_cls) +{ + struct PostgresClosure *pg = cls; + struct GNUNET_PQ_QueryParam params[] = { + GNUNET_PQ_query_param_end + }; + struct CloseReserveContext ectx = { + .rec = rec, + .rec_cls = rec_cls, + .pg = pg, + .status = GNUNET_OK + }; + enum GNUNET_DB_QueryStatus qs; + + PREPARE (pg, + "get_unfinished_close_requests", + "UPDATE close_requests AS rc" + " SET done=TRUE" + " WHERE done=FALSE" + " RETURNING" + " reserve_pub" + " ,close_request_serial_id" + " ,close_timestamp AS expiration_date" + " ,close" + " ,(SELECT payto_uri" + " FROM reserves_in ri" + " JOIN wire_targets wt ON (ri.wire_source_h_payto = wt.wire_target_h_payto)" + " WHERE ri.reserve_pub=rc.reserve_pub)" + " AS account_details;"); + qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn, + "get_unfinished_close_requests", + params, + &reserve_cb, + &ectx); + switch (ectx.status) + { + case GNUNET_SYSERR: + return GNUNET_DB_STATUS_HARD_ERROR; + case GNUNET_NO: + return GNUNET_DB_STATUS_SOFT_ERROR; + case GNUNET_OK: + break; + } + return qs; +} |