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Diffstat (limited to 'src/backenddb/pg_lookup_deposits.c')
-rw-r--r-- | src/backenddb/pg_lookup_deposits.c | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/src/backenddb/pg_lookup_deposits.c b/src/backenddb/pg_lookup_deposits.c new file mode 100644 index 00000000..2440f62c --- /dev/null +++ b/src/backenddb/pg_lookup_deposits.c @@ -0,0 +1,165 @@ +/* + 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 backenddb/pg_lookup_deposits.c + * @brief Implementation of the lookup_deposits function for Postgres + * @author Iván Ávalos + */ +#include "platform.h" +#include <taler/taler_error_codes.h> +#include <taler/taler_dbevents.h> +#include <taler/taler_pq_lib.h> +#include "pg_lookup_deposits.h" +#include "pg_helper.h" + +/** + * Closure for #lookup_deposits_cb(). + */ +struct LookupDepositsContext +{ + /** + * Function to call with results. + */ + TALER_MERCHANTDB_DepositsCallback cb; + + /** + * Closure for @e cls. + */ + void *cb_cls; + + /** + * Plugin context. + */ + struct PostgresClosure *pg; + + /** + * Transaction status (set). + */ + enum GNUNET_DB_QueryStatus qs; +}; + + +/** + * Function to be called with the results of a SELECT statement + * that has returned @a num_results results. + * + * @param[in,out] cls of type `struct LookupDepositsContext *` + * @param result the postgres result + * @param num_results the number of results in @a result + */ +static void +lookup_deposits_cb (void *cls, + PGresult *result, + unsigned int num_results) +{ + struct LookupDepositsContext *ldc = cls; + + for (unsigned int i = 0; i<num_results; i++) + { + struct TALER_CoinSpendPublicKeyP coin_pub; + struct TALER_Amount amount_with_fee; + struct TALER_Amount deposit_fee; + struct TALER_Amount refund_fee; + char *exchange_url; + struct GNUNET_PQ_ResultSpec rs[] = { + GNUNET_PQ_result_spec_string ("exchange_url", + &exchange_url), + GNUNET_PQ_result_spec_auto_from_type ("coin_pub", + &coin_pub), + TALER_PQ_result_spec_amount_with_currency ("amount_with_fee", + &amount_with_fee), + TALER_PQ_result_spec_amount_with_currency ("deposit_fee", + &deposit_fee), + TALER_PQ_result_spec_amount_with_currency ("refund_fee", + &refund_fee), + GNUNET_PQ_result_spec_end + }; + + if (GNUNET_OK != + GNUNET_PQ_extract_result (result, + rs, + i)) + { + GNUNET_break (0); + ldc->qs = GNUNET_DB_STATUS_HARD_ERROR; + return; + } + ldc->cb (ldc->cb_cls, + exchange_url, + &coin_pub, + &amount_with_fee, + &deposit_fee, + &refund_fee); + GNUNET_PQ_cleanup_result (rs); + } + ldc->qs = num_results; +} + + +enum GNUNET_DB_QueryStatus +TMH_PG_lookup_deposits ( + void *cls, + const char *instance_id, + const struct TALER_PrivateContractHashP *h_contract_terms, + TALER_MERCHANTDB_DepositsCallback cb, + void *cb_cls) +{ + struct PostgresClosure *pg = cls; + struct GNUNET_PQ_QueryParam params[] = { + GNUNET_PQ_query_param_string (instance_id), + GNUNET_PQ_query_param_auto_from_type (h_contract_terms), + GNUNET_PQ_query_param_end + }; + struct LookupDepositsContext ldc = { + .cb = cb, + .cb_cls = cb_cls, + .pg = pg + }; + enum GNUNET_DB_QueryStatus qs; + + /* no preflight check here, run in its own transaction by the caller! */ + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "Finding deposits for h_contract_terms '%s'\n", + GNUNET_h2s (&h_contract_terms->hash)); + check_connection (pg); + PREPARE (pg, + "lookup_deposits", + "SELECT" + " dcom.exchange_url" + ",dep.coin_pub" + ",dep.amount_with_fee" + ",dep.deposit_fee" + ",dep.refund_fee" + " FROM merchant_deposits dep" + " JOIN merchant_deposit_confirmations dcom" + " USING (deposit_confirmation_serial)" + " WHERE dcom.order_serial=" + " (SELECT order_serial" + " FROM merchant_contract_terms" + " WHERE h_contract_terms=$2" + " AND merchant_serial=" + " (SELECT merchant_serial" + " FROM merchant_instances" + " WHERE merchant_id=$1))"); + qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn, + "lookup_deposits", + params, + &lookup_deposits_cb, + &ldc); + if (qs <= 0) + return qs; + return ldc.qs; +} |