/*
  This file is part of Anastasis
  Copyright (C) 2020-2022 Anastasis SARL

  Anastasis is free software; you can redistribute it and/or modify it under the
  terms of the GNU Affero General Public License as published by the Free Software
  Foundation; either version 3, or (at your option) any later version.

  Anastasis 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 Affero General Public License for more details.

  You should have received a copy of the GNU Affero General Public License along with
  Anastasis; see the file COPYING.GPL.  If not, see <http://www.gnu.org/licenses/>
*/
/**
 * @file stasis/get_truth_key_share.c
 * @brief Anastasis database: get truth key share
 * @author Christian Grothoff
 */
#include "platform.h"
#include "anastasis-db_pg.h"
#include "anastasis/anastasis-database/get_truth_key_share.h"
#include "anastasis/anastasis-database/transaction.h"
#include "anastasis/anastasis-database/preflight.h"
#include <taler/taler_pq_lib.h>


/**
 * Lookup (encrypted) key share by @a truth_uuid.
 *
 * @param truth_uuid the identifier for the Truth
 * @param[out] key_share contains the encrypted Keyshare
 * @return transaction status
 */
enum GNUNET_DB_QueryStatus
ANASTASIS_DB_get_truth_key_share (
  const struct ANASTASIS_CRYPTO_TruthUUIDP *truth_uuid,
  struct ANASTASIS_CRYPTO_EncryptedKeyShareP *key_share)
{
  struct GNUNET_PQ_QueryParam params[] = {
    GNUNET_PQ_query_param_auto_from_type (truth_uuid),
    GNUNET_PQ_query_param_end
  };
  struct GNUNET_PQ_ResultSpec rs[] = {
    GNUNET_PQ_result_spec_auto_from_type ("key_share_data",
                                          key_share),
    GNUNET_PQ_result_spec_end
  };

  PREPARE ("get_truth_key_share",
           "SELECT "
           "key_share_data "
           "FROM "
           "anastasis_truth "
           "WHERE truth_uuid =$1;");
  return GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
                                                   "get_truth_key_share",
                                                   params,
                                                   rs);
}


/* end of get_truth_key_share.c */
