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/*
This file is part of TALER
(C) 2014-2023 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 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 taler-merchant-httpd_post-orders-ID-paid.c
* @brief handling of POST /orders/$ID/paid requests
* @author Christian Grothoff
*/
#include "platform.h"
#include <taler/taler_dbevents.h>
#include <taler/taler_signatures.h>
#include <taler/taler_json_lib.h>
#include <taler/taler_exchange_service.h>
#include "taler-merchant-httpd_post-orders-ID-paid.h"
/**
* Function called with information about a refund.
* Sets the boolean in @a cls to true when called.
*
* @param cls closure, a `bool *`
* @param coin_pub public coin from which the refund comes from
* @param refund_amount refund amount which is being taken from @a coin_pub
*/
static void
refund_cb (
void *cls,
const struct TALER_CoinSpendPublicKeyP *coin_pub,
const struct TALER_Amount *refund_amount)
{
bool *refunded = cls;
*refunded = true;
}
/**
* Use database to notify other clients about the
* session being captured.
*
* @param hc http context
* @param session_id the captured session
* @param fulfillment_url the URL that is now paid for by @a session_id
*/
static void
trigger_session_notification (struct TMH_HandlerContext *hc,
const char *session_id,
const char *fulfillment_url)
{
struct TMH_SessionEventP session_eh = {
.header.size = htons (sizeof (session_eh)),
.header.type = htons (TALER_DBEVENT_MERCHANT_SESSION_CAPTURED),
.merchant_pub = hc->instance->merchant_pub
};
GNUNET_CRYPTO_hash (session_id,
strlen (session_id),
&session_eh.h_session_id);
GNUNET_CRYPTO_hash (fulfillment_url,
strlen (fulfillment_url),
&session_eh.h_fulfillment_url);
TMH_db->event_notify (TMH_db->cls,
&session_eh.header,
NULL,
0);
}
MHD_RESULT
TMH_post_orders_ID_paid (const struct TMH_RequestHandler *rh,
struct MHD_Connection *connection,
struct TMH_HandlerContext *hc)
{
const char *order_id = hc->infix;
struct TALER_MerchantSignatureP merchant_sig;
const char *session_id;
struct TALER_PrivateContractHashP hct;
json_t *contract_terms;
const char *fulfillment_url;
enum GNUNET_DB_QueryStatus qs;
{
struct GNUNET_JSON_Specification spec[] = {
GNUNET_JSON_spec_fixed_auto ("sig",
&merchant_sig),
GNUNET_JSON_spec_fixed_auto ("h_contract",
&hct),
GNUNET_JSON_spec_string ("session_id",
&session_id),
GNUNET_JSON_spec_end ()
};
enum GNUNET_GenericReturnValue res;
res = TALER_MHD_parse_json_data (connection,
hc->request_body,
spec);
if (GNUNET_YES != res)
{
GNUNET_break_op (0);
return (GNUNET_NO == res)
? MHD_YES
: MHD_NO;
}
}
if (GNUNET_OK !=
TALER_merchant_pay_verify (&hct,
&hc->instance->merchant_pub,
&merchant_sig))
{
GNUNET_break_op (0);
return TALER_MHD_reply_with_error (connection,
MHD_HTTP_FORBIDDEN,
TALER_EC_MERCHANT_POST_ORDERS_ID_PAID_COIN_SIGNATURE_INVALID,
NULL);
}
TMH_db->preflight (TMH_db->cls);
{
uint64_t order_serial;
qs = TMH_db->lookup_contract_terms (TMH_db->cls,
hc->instance->settings.id,
order_id,
&contract_terms,
&order_serial,
NULL);
}
if (0 > qs)
{
/* single, read-only SQL statements should never cause
serialization problems */
GNUNET_break (GNUNET_DB_STATUS_SOFT_ERROR != qs);
/* Always report on hard error as well to enable diagnostics */
GNUNET_break (GNUNET_DB_STATUS_HARD_ERROR == qs);
return TALER_MHD_reply_with_error (connection,
MHD_HTTP_INTERNAL_SERVER_ERROR,
TALER_EC_GENERIC_DB_FETCH_FAILED,
"lookup_contract_terms");
}
if (GNUNET_DB_STATUS_SUCCESS_NO_RESULTS == qs)
{
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
"Unknown order id given: `%s'\n",
order_id);
return TALER_MHD_reply_with_error (connection,
MHD_HTTP_NOT_FOUND,
TALER_EC_MERCHANT_GENERIC_ORDER_UNKNOWN,
order_id);
}
{
struct TALER_PrivateContractHashP h_contract_terms;
if (GNUNET_OK !=
TALER_JSON_contract_hash (contract_terms,
&h_contract_terms))
{
GNUNET_break (0);
json_decref (contract_terms);
return TALER_MHD_reply_with_error (connection,
MHD_HTTP_INTERNAL_SERVER_ERROR,
TALER_EC_GENERIC_FAILED_COMPUTE_JSON_HASH,
NULL);
}
if (0 != GNUNET_memcmp (&hct,
&h_contract_terms))
{
json_decref (contract_terms);
return TALER_MHD_reply_with_error (connection,
MHD_HTTP_BAD_REQUEST,
TALER_EC_MERCHANT_POST_ORDERS_ID_PAID_CONTRACT_HASH_MISMATCH,
NULL);
}
}
fulfillment_url
= json_string_value (json_object_get (contract_terms,
"fulfillment_url"));
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Marking contract %s with %s/%s as paid\n",
order_id,
session_id,
fulfillment_url);
qs = TMH_db->mark_contract_paid (TMH_db->cls,
hc->instance->settings.id,
&hct,
session_id);
/* If the order was paid already, we get qs == 0. */
if (0 > qs)
{
GNUNET_break (0);
json_decref (contract_terms);
return TALER_MHD_reply_with_error (connection,
MHD_HTTP_INTERNAL_SERVER_ERROR,
TALER_EC_GENERIC_DB_STORE_FAILED,
"mark_contract_paid");
}
/* Wake everybody up who waits for this fulfillment_url and session_id */
if ( (NULL != fulfillment_url) &&
(NULL != session_id) )
trigger_session_notification (hc,
session_id,
fulfillment_url);
/* fulfillment_url is part of the contract_terms */
{
bool refunded = false;
qs = TMH_db->lookup_refunds (TMH_db->cls,
hc->instance->settings.id,
&hct,
&refund_cb,
&refunded);
json_decref (contract_terms);
return TALER_MHD_REPLY_JSON_PACK (
connection,
MHD_HTTP_OK,
GNUNET_JSON_pack_bool ("refunded",
refunded));
}
}
/* end of taler-merchant-httpd_post-orders-ID-paid.c */
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