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1 : /* 2 : This file is part of TALER 3 : Copyright (C) 2022 Taler Systems SA 4 : 5 : TALER is free software; you can redistribute it and/or modify it under the 6 : terms of the GNU General Public License as published by the Free Software 7 : Foundation; either version 3, or (at your option) any later version. 8 : 9 : TALER is distributed in the hope that it will be useful, but WITHOUT ANY 10 : WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR 11 : A PARTICULAR PURPOSE. See the GNU General Public License for more details. 12 : 13 : You should have received a copy of the GNU General Public License along with 14 : TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/> 15 : */ 16 : /** 17 : * @file exchangedb/pg_get_coin_denomination.c 18 : * @brief Implementation of the get_coin_denomination function for Postgres 19 : * @author Christian Grothoff 20 : */ 21 : #include "platform.h" 22 : #include "taler_error_codes.h" 23 : #include "taler_dbevents.h" 24 : #include "taler_pq_lib.h" 25 : #include "pg_get_coin_denomination.h" 26 : #include "pg_helper.h" 27 : 28 : enum GNUNET_DB_QueryStatus 29 48 : TEH_PG_get_coin_denomination ( 30 : void *cls, 31 : const struct TALER_CoinSpendPublicKeyP *coin_pub, 32 : uint64_t *known_coin_id, 33 : struct TALER_DenominationHashP *denom_hash) 34 : { 35 48 : struct PostgresClosure *pg = cls; 36 48 : struct GNUNET_PQ_QueryParam params[] = { 37 48 : GNUNET_PQ_query_param_auto_from_type (coin_pub), 38 : GNUNET_PQ_query_param_end 39 : }; 40 48 : struct GNUNET_PQ_ResultSpec rs[] = { 41 48 : GNUNET_PQ_result_spec_auto_from_type ("denom_pub_hash", 42 : denom_hash), 43 48 : GNUNET_PQ_result_spec_uint64 ("known_coin_id", 44 : known_coin_id), 45 : GNUNET_PQ_result_spec_end 46 : }; 47 : 48 48 : GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, 49 : "Getting coin denomination of coin %s\n", 50 : TALER_B2S (coin_pub)); 51 : 52 : /* Used in #postgres_get_coin_denomination() to fetch 53 : the denomination public key hash for 54 : a coin known to the exchange. */ 55 48 : PREPARE (pg, 56 : "get_coin_denomination", 57 : "SELECT" 58 : " denominations.denom_pub_hash" 59 : ",known_coin_id" 60 : " FROM known_coins" 61 : " JOIN denominations USING (denominations_serial)" 62 : " WHERE coin_pub=$1" 63 : " FOR SHARE;"); 64 : 65 48 : return GNUNET_PQ_eval_prepared_singleton_select (pg->conn, 66 : "get_coin_denomination", 67 : params, 68 : rs); 69 : }