1 files changed, 153 insertions, 0 deletions
diff --git a/src/exchangedb/pg_select_purse_deposits_by_purse.c b/src/exchangedb/pg_select_purse_deposits_by_purse.c
new file mode 100644
index 000000000..94b935cb4
--- /dev/null
+++ b/src/exchangedb/pg_select_purse_deposits_by_purse.c
@@ -0,0 +1,153 @@
+/*
+   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_purse_deposits_by_purse.c
+ * @brief Implementation of the select_purse_deposits_by_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_select_purse_deposits_by_purse.h"
+#include "pg_helper.h"
+
+/**
+ * Closure for #purse_refund_coin_helper_cb().
+ */
+struct PurseRefundCoinContext
+{
+
+  /**
+   * Callback to call.
+   */
+  TALER_EXCHANGEDB_PurseRefundCoinCallback 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 PurseRefundCoinContext`
+ * @param result the postgres result
+ * @param num_results the number of results in @a result
+ */
+static void
+purse_refund_coin_helper_cb (void *cls,
+                             PGresult *result,
+                             unsigned int num_results)
+{
+  struct PurseRefundCoinContext *dsc = cls;
+  struct PostgresClosure *pg = dsc->pg;
+
+  for (unsigned int i = 0; i<num_results; i++)
+  {
+    struct TALER_Amount amount_with_fee;
+    struct TALER_CoinSpendPublicKeyP coin_pub;
+    struct TALER_DenominationPublicKey denom_pub;
+    uint64_t rowid;
+    struct GNUNET_PQ_ResultSpec rs[] = {
+      TALER_PQ_result_spec_denom_pub ("denom_pub",
+                                      &denom_pub),
+      TALER_PQ_RESULT_SPEC_AMOUNT ("amount_with_fee",
+                                   &amount_with_fee),
+      GNUNET_PQ_result_spec_auto_from_type ("coin_pub",
+                                            &coin_pub),
+      GNUNET_PQ_result_spec_uint64 ("purse_deposit_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);
+      dsc->status = GNUNET_SYSERR;
+      return;
+    }
+    ret = dsc->cb (dsc->cb_cls,
+                   rowid,
+                   &amount_with_fee,
+                   &coin_pub,
+                   &denom_pub);
+    GNUNET_PQ_cleanup_result (rs);
+    if (GNUNET_OK != ret)
+      break;
+  }
+}
+
+
+enum GNUNET_DB_QueryStatus
+TEH_PG_select_purse_deposits_by_purse (
+  void *cls,
+  const struct TALER_PurseContractPublicKeyP *purse_pub,
+  TALER_EXCHANGEDB_PurseRefundCoinCallback cb,
+  void *cb_cls)
+{
+  struct PostgresClosure *pg = cls;
+  struct GNUNET_PQ_QueryParam params[] = {
+    GNUNET_PQ_query_param_auto_from_type (purse_pub),
+    GNUNET_PQ_query_param_end
+  };
+  struct PurseRefundCoinContext dsc = {
+    .cb = cb,
+    .cb_cls = cb_cls,
+    .pg = pg,
+    .status = GNUNET_OK
+  };
+  enum GNUNET_DB_QueryStatus qs;
+
+  PREPARE (pg,
+           "audit_get_purse_deposits_by_purse",
+           "SELECT"
+           " pd.purse_deposit_serial_id"
+           ",pd.amount_with_fee"
+           ",pd.coin_pub"
+           ",denom.denom_pub"
+           " FROM purse_deposits pd"
+           " JOIN known_coins kc"
+           "   USING (coin_pub)"
+           " JOIN denominations denom"
+           "   USING (denominations_serial)"
+           " WHERE purse_pub=$1;");
+  qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
+                                             "audit_get_purse_deposits_by_purse",
+                                             params,
+                                             &purse_refund_coin_helper_cb,
+                                             &dsc);
+  if (GNUNET_OK != dsc.status)
+    return GNUNET_DB_STATUS_HARD_ERROR;
+  return qs;
+}