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-rw-r--r--src/exchangedb/pg_select_refunds_above_serial_id.c223
1 files changed, 223 insertions, 0 deletions
diff --git a/src/exchangedb/pg_select_refunds_above_serial_id.c b/src/exchangedb/pg_select_refunds_above_serial_id.c
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+++ b/src/exchangedb/pg_select_refunds_above_serial_id.c
@@ -0,0 +1,223 @@
+/*
+ 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_refunds_above_serial_id.c
+ * @brief Implementation of the select_refunds_above_serial_id 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_refunds_above_serial_id.h"
+#include "pg_helper.h"
+
+/**
+ * Closure for #refunds_serial_helper_cb().
+ */
+struct RefundsSerialContext
+{
+
+ /**
+ * Callback to call.
+ */
+ TALER_EXCHANGEDB_RefundCallback cb;
+
+ /**
+ * Closure for @e cb.
+ */
+ void *cb_cls;
+
+ /**
+ * Plugin context.
+ */
+ struct PostgresClosure *pg;
+
+ /**
+ * Status code, set to #GNUNET_SYSERR on hard errors.
+ */
+ enum GNUNET_GenericReturnValue status;
+};
+
+
+/**
+ * Helper function to be called with the results of a SELECT statement
+ * that has returned @a num_results results.
+ *
+ * @param cls closure of type `struct RefundsSerialContext`
+ * @param result the postgres result
+ * @param num_results the number of results in @a result
+ */
+static void
+refunds_serial_helper_cb (void *cls,
+ PGresult *result,
+ unsigned int num_results)
+{
+ struct RefundsSerialContext *rsc = cls;
+ struct PostgresClosure *pg = rsc->pg;
+
+ for (unsigned int i = 0; i<num_results; i++)
+ {
+ struct TALER_EXCHANGEDB_Refund refund;
+ struct TALER_DenominationPublicKey denom_pub;
+ uint64_t rowid;
+ bool full_refund;
+ struct GNUNET_PQ_ResultSpec rs[] = {
+ GNUNET_PQ_result_spec_auto_from_type ("merchant_pub",
+ &refund.details.merchant_pub),
+ GNUNET_PQ_result_spec_auto_from_type ("merchant_sig",
+ &refund.details.merchant_sig),
+ GNUNET_PQ_result_spec_auto_from_type ("h_contract_terms",
+ &refund.details.h_contract_terms),
+ GNUNET_PQ_result_spec_uint64 ("rtransaction_id",
+ &refund.details.rtransaction_id),
+ TALER_PQ_result_spec_denom_pub ("denom_pub",
+ &denom_pub),
+ GNUNET_PQ_result_spec_auto_from_type ("coin_pub",
+ &refund.coin.coin_pub),
+ TALER_PQ_RESULT_SPEC_AMOUNT ("amount_with_fee",
+ &refund.details.refund_amount),
+ GNUNET_PQ_result_spec_uint64 ("refund_serial_id",
+ &rowid),
+ GNUNET_PQ_result_spec_end
+ };
+ enum GNUNET_GenericReturnValue ret;
+
+ if (GNUNET_OK !=
+ GNUNET_PQ_extract_result (result,
+ rs,
+ i))
+ {
+ GNUNET_break (0);
+ rsc->status = GNUNET_SYSERR;
+ return;
+ }
+ {
+ struct GNUNET_PQ_QueryParam params[] = {
+ GNUNET_PQ_query_param_uint64 (&rowid),
+ GNUNET_PQ_query_param_end
+ };
+ struct TALER_Amount amount_with_fee;
+ uint64_t s_f;
+ uint64_t s_v;
+ struct GNUNET_PQ_ResultSpec rs2[] = {
+ GNUNET_PQ_result_spec_uint64 ("s_v",
+ &s_v),
+ GNUNET_PQ_result_spec_uint64 ("s_f",
+ &s_f),
+ TALER_PQ_RESULT_SPEC_AMOUNT ("amount_with_fee",
+ &amount_with_fee),
+ GNUNET_PQ_result_spec_end
+ };
+ enum GNUNET_DB_QueryStatus qs;
+
+ qs = GNUNET_PQ_eval_prepared_singleton_select (
+ pg->conn,
+ "test_refund_full",
+ params,
+ rs2);
+ if (qs <= 0)
+ {
+ GNUNET_break (0);
+ rsc->status = GNUNET_SYSERR;
+ return;
+ }
+ /* normalize */
+ s_v += s_f / TALER_AMOUNT_FRAC_BASE;
+ s_f %= TALER_AMOUNT_FRAC_BASE;
+ full_refund = (s_v >= amount_with_fee.value) &&
+ (s_f >= amount_with_fee.fraction);
+ }
+ ret = rsc->cb (rsc->cb_cls,
+ rowid,
+ &denom_pub,
+ &refund.coin.coin_pub,
+ &refund.details.merchant_pub,
+ &refund.details.merchant_sig,
+ &refund.details.h_contract_terms,
+ refund.details.rtransaction_id,
+ full_refund,
+ &refund.details.refund_amount);
+ GNUNET_PQ_cleanup_result (rs);
+ if (GNUNET_OK != ret)
+ break;
+ }
+}
+
+
+enum GNUNET_DB_QueryStatus
+TEH_PG_select_refunds_above_serial_id (
+ void *cls,
+ uint64_t serial_id,
+ TALER_EXCHANGEDB_RefundCallback cb,
+ void *cb_cls)
+{
+ struct PostgresClosure *pg = cls;
+ struct GNUNET_PQ_QueryParam params[] = {
+ GNUNET_PQ_query_param_uint64 (&serial_id),
+ GNUNET_PQ_query_param_end
+ };
+ struct RefundsSerialContext rsc = {
+ .cb = cb,
+ .cb_cls = cb_cls,
+ .pg = pg,
+ .status = GNUNET_OK
+ };
+ enum GNUNET_DB_QueryStatus qs;
+
+ /* Fetch refunds with rowid '\geq' the given parameter */
+ PREPARE (pg,
+ "audit_get_refunds_incr",
+ "SELECT"
+ " bdep.merchant_pub"
+ ",ref.merchant_sig"
+ ",bdep.h_contract_terms"
+ ",ref.rtransaction_id"
+ ",denom.denom_pub"
+ ",kc.coin_pub"
+ ",ref.amount_with_fee"
+ ",ref.refund_serial_id"
+ " FROM refunds ref"
+ " JOIN batch_deposits bdep"
+ " ON (ref.batch_deposit_serial_id=bdep.batch_deposit_serial_id)"
+ " JOIN coin_deposits cdep"
+ " ON (ref.coin_pub=cdep.coin_pub AND ref.batch_deposit_serial_id=cdep.batch_deposit_serial_id)"
+ " JOIN known_coins kc"
+ " ON (cdep.coin_pub=kc.coin_pub)"
+ " JOIN denominations denom"
+ " ON (kc.denominations_serial=denom.denominations_serial)"
+ " WHERE ref.refund_serial_id>=$1"
+ " ORDER BY ref.refund_serial_id ASC;");
+ PREPARE (pg,
+ "test_refund_full",
+ "SELECT"
+ " CAST(SUM(CAST((ref.amount_with_fee).frac AS INT8)) AS INT8) AS s_f"
+ ",CAST(SUM((ref.amount_with_fee).val) AS INT8) AS s_v"
+ ",cdep.amount_with_fee"
+ " FROM refunds ref"
+ " JOIN coin_deposits cdep"
+ " ON (ref.coin_pub=cdep.coin_pub AND ref.batch_deposit_serial_id=cdep.batch_deposit_serial_id)"
+ " WHERE ref.refund_serial_id=$1"
+ " GROUP BY (cdep.amount_with_fee);");
+ qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
+ "audit_get_refunds_incr",
+ params,
+ &refunds_serial_helper_cb,
+ &rsc);
+ if (GNUNET_OK != rsc.status)
+ return GNUNET_DB_STATUS_HARD_ERROR;
+ return qs;
+}