diff options
Diffstat (limited to 'src/exchangedb/pg_find_aggregation_transient.c')
-rw-r--r-- | src/exchangedb/pg_find_aggregation_transient.c | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/src/exchangedb/pg_find_aggregation_transient.c b/src/exchangedb/pg_find_aggregation_transient.c new file mode 100644 index 000000000..a5f367b5f --- /dev/null +++ b/src/exchangedb/pg_find_aggregation_transient.c @@ -0,0 +1,151 @@ +/* + 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 exchangedb/pg_find_aggregation_transient.c + * @brief Implementation of the find_aggregation_transient function for Postgres + * @author Christian Grothoff + */ +#include "platform.h" +#include "taler_error_codes.h" +#include "taler_dbevents.h" +#include "taler_pq_lib.h" +#include "pg_find_aggregation_transient.h" +#include "pg_helper.h" + + +/** + * Closure for #get_refunds_cb(). + */ +struct FindAggregationTransientContext +{ + /** + * Function to call on each result. + */ + TALER_EXCHANGEDB_TransientAggregationCallback cb; + + /** + * Closure for @a cb. + */ + void *cb_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 of type `struct SelectRefundContext *` + * @param result the postgres result + * @param num_results the number of results in @a result + */ +static void +get_transients_cb (void *cls, + PGresult *result, + unsigned int num_results) +{ + struct FindAggregationTransientContext *srctx = cls; + struct PostgresClosure *pg = srctx->pg; + + for (unsigned int i = 0; i<num_results; i++) + { + struct TALER_Amount amount; + char *payto_uri; + struct TALER_WireTransferIdentifierRawP wtid; + struct TALER_MerchantPublicKeyP merchant_pub; + struct GNUNET_PQ_ResultSpec rs[] = { + GNUNET_PQ_result_spec_auto_from_type ("merchant_pub", + &merchant_pub), + GNUNET_PQ_result_spec_auto_from_type ("wtid_raw", + &wtid), + GNUNET_PQ_result_spec_string ("payto_uri", + &payto_uri), + TALER_PQ_RESULT_SPEC_AMOUNT ("amount", + &amount), + GNUNET_PQ_result_spec_end + }; + bool cont; + + if (GNUNET_OK != + GNUNET_PQ_extract_result (result, + rs, + i)) + { + GNUNET_break (0); + srctx->status = GNUNET_SYSERR; + return; + } + cont = srctx->cb (srctx->cb_cls, + payto_uri, + &wtid, + &merchant_pub, + &amount); + GNUNET_free (payto_uri); + if (! cont) + break; + } +} + + +enum GNUNET_DB_QueryStatus +TEH_PG_find_aggregation_transient ( + void *cls, + const struct TALER_PaytoHashP *h_payto, + TALER_EXCHANGEDB_TransientAggregationCallback cb, + void *cb_cls) +{ + struct PostgresClosure *pg = cls; + enum GNUNET_DB_QueryStatus qs; + struct GNUNET_PQ_QueryParam params[] = { + GNUNET_PQ_query_param_auto_from_type (h_payto), + GNUNET_PQ_query_param_end + }; + struct FindAggregationTransientContext srctx = { + .cb = cb, + .cb_cls = cb_cls, + .pg = pg, + .status = GNUNET_OK + }; + /* Used in #postgres_find_aggregation_transient() */ + PREPARE (pg, + "find_transient_aggregations", + "SELECT" + " amount_val" + " ,amount_frac" + " ,wtid_raw" + " ,merchant_pub" + " ,payto_uri" + " FROM aggregation_transient atr" + " JOIN wire_targets wt USING (wire_target_h_payto)" + " WHERE atr.wire_target_h_payto=$1;"); + qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn, + "find_transient_aggregations", + params, + &get_transients_cb, + &srctx); + if (GNUNET_SYSERR == srctx.status) + return GNUNET_DB_STATUS_HARD_ERROR; + return qs; +} |