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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 Affero 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License along with
TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
/**
* @file taler-exchange-httpd_purses_delete.c
* @brief Handle DELETE /purses/$PID requests; parses the request and
* verifies the signature before handing deletion to the database.
* @author Christian Grothoff
*/
#include "platform.h"
#include <gnunet/gnunet_util_lib.h>
#include <gnunet/gnunet_json_lib.h>
#include <jansson.h>
#include <microhttpd.h>
#include "taler_dbevents.h"
#include "taler_json_lib.h"
#include "taler_mhd_lib.h"
#include "taler-exchange-httpd_common_deposit.h"
#include "taler-exchange-httpd_purses_delete.h"
#include "taler-exchange-httpd_responses.h"
#include "taler_exchangedb_lib.h"
#include "taler-exchange-httpd_keys.h"
MHD_RESULT
TEH_handler_purses_delete (
struct TEH_RequestContext *rc,
const char *const args[1])
{
struct MHD_Connection *connection = rc->connection;
struct TALER_PurseContractPublicKeyP purse_pub;
struct TALER_PurseContractSignatureP purse_sig;
bool found;
bool decided;
if (GNUNET_OK !=
GNUNET_STRINGS_string_to_data (args[0],
strlen (args[0]),
&purse_pub,
sizeof (purse_pub)))
{
GNUNET_break_op (0);
return TALER_MHD_reply_with_error (connection,
MHD_HTTP_BAD_REQUEST,
TALER_EC_EXCHANGE_GENERIC_PURSE_PUB_MALFORMED,
args[0]);
}
TALER_MHD_parse_request_header_auto_t (connection,
"Taler-Purse-Signature",
&purse_sig);
if (GNUNET_OK !=
TALER_wallet_purse_delete_verify (&purse_pub,
&purse_sig))
{
TALER_LOG_WARNING ("Invalid signature on /purses/$PID/delete request\n");
return TALER_MHD_reply_with_error (connection,
MHD_HTTP_FORBIDDEN,
TALER_EC_EXCHANGE_PURSE_DELETE_SIGNATURE_INVALID,
NULL);
}
if (GNUNET_SYSERR ==
TEH_plugin->preflight (TEH_plugin->cls))
{
GNUNET_break (0);
return TALER_MHD_reply_with_error (connection,
MHD_HTTP_INTERNAL_SERVER_ERROR,
TALER_EC_GENERIC_DB_START_FAILED,
"preflight failure");
}
{
enum GNUNET_DB_QueryStatus qs;
qs = TEH_plugin->do_purse_delete (TEH_plugin->cls,
&purse_pub,
&purse_sig,
&decided,
&found);
if (qs <= 0)
{
TALER_LOG_WARNING (
"Failed to store delete purse information in database\n");
return TALER_MHD_reply_with_error (connection,
MHD_HTTP_INTERNAL_SERVER_ERROR,
TALER_EC_GENERIC_DB_STORE_FAILED,
"purse delete");
}
}
if (! found)
{
return TALER_MHD_reply_with_ec (
connection,
TALER_EC_EXCHANGE_GENERIC_PURSE_UNKNOWN,
NULL);
}
if (decided)
{
return TALER_MHD_reply_with_ec (
connection,
TALER_EC_EXCHANGE_PURSE_DELETE_ALREADY_DECIDED,
NULL);
}
{
/* Possible minor optimization: integrate notification with
transaction above... */
struct TALER_PurseEventP rep = {
.header.size = htons (sizeof (rep)),
.header.type = htons (TALER_DBEVENT_EXCHANGE_PURSE_DEPOSITED),
.purse_pub = purse_pub
};
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
"Notifying about purse deletion %s\n",
TALER_B2S (&purse_pub));
TEH_plugin->event_notify (TEH_plugin->cls,
&rep.header,
NULL,
0);
}
/* success */
return TALER_MHD_reply_static (connection,
MHD_HTTP_NO_CONTENT,
NULL,
NULL,
0);
}
/* end of taler-exchange-httpd_purses_delete.c */
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