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-rw-r--r--src/exchangedb/pg_do_reserve_purse.c121
1 files changed, 121 insertions, 0 deletions
diff --git a/src/exchangedb/pg_do_reserve_purse.c b/src/exchangedb/pg_do_reserve_purse.c
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+++ b/src/exchangedb/pg_do_reserve_purse.c
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+/*
+ 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_do_reserve_purse.c
+ * @brief Implementation of the do_reserve_purse 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_do_reserve_purse.h"
+#include "pg_helper.h"
+/**
+ * Function called insert request to merge a purse into a reserve by the
+ * respective purse merge key. The purse must not have been merged into a
+ * different reserve.
+ *
+ * @param cls the @e cls of this struct with the plugin-specific state
+ * @param purse_pub purse to merge
+ * @param merge_sig signature affirming the merge
+ * @param merge_timestamp time of the merge
+ * @param reserve_sig signature of the reserve affirming the merge
+ * @param purse_fee amount to charge the reserve for the purse creation, NULL to use the quota
+ * @param reserve_pub public key of the reserve to credit
+ * @param[out] in_conflict set to true if @a purse_pub was merged into a different reserve already
+ * @param[out] no_reserve set to true if @a reserve_pub is not a known reserve
+ * @param[out] insufficient_funds set to true if @a reserve_pub has insufficient capacity to create another purse
+ * @return transaction status code
+ */
+enum GNUNET_DB_QueryStatus
+TEH_PG_do_reserve_purse (
+ void *cls,
+ const struct TALER_PurseContractPublicKeyP *purse_pub,
+ const struct TALER_PurseMergeSignatureP *merge_sig,
+ const struct GNUNET_TIME_Timestamp merge_timestamp,
+ const struct TALER_ReserveSignatureP *reserve_sig,
+ const struct TALER_Amount *purse_fee,
+ const struct TALER_ReservePublicKeyP *reserve_pub,
+ bool *in_conflict,
+ bool *no_reserve,
+ bool *insufficient_funds)
+{
+ struct PostgresClosure *pg = cls;
+ struct TALER_Amount zero_fee;
+ struct TALER_PaytoHashP h_payto;
+ struct GNUNET_TIME_Timestamp reserve_expiration
+ = GNUNET_TIME_absolute_to_timestamp (
+ GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
+ pg->idle_reserve_expiration_time));
+ struct GNUNET_TIME_Timestamp reserve_gc
+ = GNUNET_TIME_absolute_to_timestamp (
+ GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
+ pg->legal_reserve_expiration_time));
+
+ struct GNUNET_PQ_QueryParam params[] = {
+ GNUNET_PQ_query_param_auto_from_type (purse_pub),
+ GNUNET_PQ_query_param_auto_from_type (merge_sig),
+ GNUNET_PQ_query_param_timestamp (&merge_timestamp),
+ GNUNET_PQ_query_param_timestamp (&reserve_expiration),
+ GNUNET_PQ_query_param_timestamp (&reserve_gc),
+ GNUNET_PQ_query_param_auto_from_type (reserve_sig),
+ GNUNET_PQ_query_param_bool (NULL == purse_fee),
+ TALER_PQ_query_param_amount (pg->conn,
+ NULL == purse_fee
+ ? &zero_fee
+ : purse_fee),
+ GNUNET_PQ_query_param_auto_from_type (reserve_pub),
+ GNUNET_PQ_query_param_auto_from_type (&h_payto),
+ GNUNET_PQ_query_param_end
+ };
+ struct GNUNET_PQ_ResultSpec rs[] = {
+ GNUNET_PQ_result_spec_bool ("insufficient_funds",
+ insufficient_funds),
+ GNUNET_PQ_result_spec_bool ("conflict",
+ in_conflict),
+ GNUNET_PQ_result_spec_bool ("no_reserve",
+ no_reserve),
+ GNUNET_PQ_result_spec_end
+ };
+
+ {
+ char *payto_uri;
+
+ payto_uri = TALER_reserve_make_payto (pg->exchange_url,
+ reserve_pub);
+ TALER_payto_hash (payto_uri,
+ &h_payto);
+ GNUNET_free (payto_uri);
+ }
+ GNUNET_assert (GNUNET_OK ==
+ TALER_amount_set_zero (pg->currency,
+ &zero_fee));
+ /* Used in #postgres_do_reserve_purse() */
+ PREPARE (pg,
+ "call_reserve_purse",
+ "SELECT"
+ " out_no_funds AS insufficient_funds"
+ ",out_no_reserve AS no_reserve"
+ ",out_conflict AS conflict"
+ " FROM exchange_do_reserve_purse"
+ " ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10);");
+
+ return GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
+ "call_reserve_purse",
+ params,
+ rs);
+}