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Diffstat (limited to 'src/exchangedb/pg_select_aml_process.c')
-rw-r--r-- | src/exchangedb/pg_select_aml_process.c | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/src/exchangedb/pg_select_aml_process.c b/src/exchangedb/pg_select_aml_process.c new file mode 100644 index 000000000..c34cae4bb --- /dev/null +++ b/src/exchangedb/pg_select_aml_process.c @@ -0,0 +1,170 @@ +/* + 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_select_aml_process.c + * @brief Implementation of the select_aml_process 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_select_aml_process.h" +#include "pg_helper.h" + + +/** + * Closure for #handle_aml_result. + */ +struct AmlProcessResultContext +{ + /** + * Function to call on each result. + */ + TALER_EXCHANGEDB_AmlStatusCallback cb; + + /** + * Closure for @e cb. + */ + void *cb_cls; + + /** + * Plugin context. + */ + struct PostgresClosure *pg; + + /** + * Set to #GNUNET_SYSERR on serious errors. + */ + enum GNUNET_GenericReturnValue status; +}; + + +/** + * Function to be called with the results of a SELECT statement + * that has returned @a num_results results. Helper function + * for #TEH_PG_select_aml_process(). + * + * @param cls closure of type `struct AmlProcessResultContext *` + * @param result the postgres result + * @param num_results the number of results in @a result + */ +static void +handle_aml_result (void *cls, + PGresult *result, + unsigned int num_results) +{ + struct AmlProcessResultContext *ctx = cls; + struct PostgresClosure *pg = ctx->pg; + + for (unsigned int i = 0; i<num_results; i++) + { + struct TALER_PaytoHashP h_payto; + struct TALER_Amount threshold; + uint64_t rowid; + uint32_t sv; + struct GNUNET_PQ_ResultSpec rs[] = { + GNUNET_PQ_result_spec_uint64 ("aml_status_serial_id", + &rowid), + GNUNET_PQ_result_spec_auto_from_type ("h_payto", + &h_payto), + TALER_PQ_RESULT_SPEC_AMOUNT ("threshold", + &threshold), + GNUNET_PQ_result_spec_uint32 ("status", + &sv), + GNUNET_PQ_result_spec_end + }; + + if (GNUNET_OK != + GNUNET_PQ_extract_result (result, + rs, + i)) + { + GNUNET_break (0); + ctx->status = GNUNET_SYSERR; + return; + } + ctx->cb (ctx->cb_cls, + rowid, + &h_payto, + &threshold, + (enum TALER_AmlDecisionState) sv); + GNUNET_PQ_cleanup_result (rs); + } +} + + +enum GNUNET_DB_QueryStatus +TEH_PG_select_aml_process ( + void *cls, + enum TALER_AmlDecisionState decision, + uint64_t row_off, + uint64_t limit, + bool forward, + TALER_EXCHANGEDB_AmlStatusCallback cb, + void *cb_cls) +{ + struct PostgresClosure *pg = cls; + struct GNUNET_PQ_QueryParam params[] = { + GNUNET_PQ_query_param_uint32 (&decision), + GNUNET_PQ_query_param_uint64 (&row_off), + GNUNET_PQ_query_param_uint64 (&limit), + GNUNET_PQ_query_param_end + }; + struct AmlProcessResultContext ctx = { + .cb = cb, + .cb_cls = cb_cls, + .pg = pg, + .status = GNUNET_OK + }; + enum GNUNET_DB_QueryStatus qs; + const char *stmt = forward + ? "select_aml_process_inc" + : "select_aml_process_dec"; + + PREPARE (pg, + "select_aml_process_inc", + "SELECT" + " aml_status_serial_id" + ",h_payto" + ",threshold" + ",status" + " FROM aml_status" + " WHERE aml_status_serial_id > $2" + " AND status = $1" + " ORDER BY aml_status_serial_id ASC" + " LIMIT $3"); + PREPARE (pg, + "select_aml_process_dec", + "SELECT" + " aml_status_serial_id" + ",h_payto" + ",threshold" + ",status" + " FROM aml_status" + " WHERE aml_status_serial_id < $2" + " AND status = $1" + " ORDER BY aml_status_serial_id DESC" + " LIMIT $3"); + qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn, + stmt, + params, + &handle_aml_result, + &ctx); + if (GNUNET_OK != ctx.status) + return GNUNET_DB_STATUS_HARD_ERROR; + return qs; +} |