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/*
This file is part of TALER
Copyright (C) 2021 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 lib/exchange_api_kyc_check.c
* @brief Implementation of the /kyc-check request
* @author Christian Grothoff
*/
#include "platform.h"
#include <microhttpd.h> /* just for HTTP check codes */
#include <gnunet/gnunet_util_lib.h>
#include <gnunet/gnunet_curl_lib.h>
#include "taler_exchange_service.h"
#include "taler_json_lib.h"
#include "exchange_api_handle.h"
#include "taler_signatures.h"
#include "exchange_api_curl_defaults.h"
/**
* @brief A ``/kyc-check`` handle
*/
struct TALER_EXCHANGE_KycCheckHandle
{
/**
* The connection to exchange this request handle will use
*/
struct TALER_EXCHANGE_Handle *exchange;
/**
* The url for this request.
*/
char *url;
/**
* Handle for the request.
*/
struct GNUNET_CURL_Job *job;
/**
* Function to call with the result.
*/
TALER_EXCHANGE_KycStatusCallback cb;
/**
* Closure for @e cb.
*/
void *cb_cls;
};
/**
* Function called when we're done processing the
* HTTP /kyc-check request.
*
* @param cls the `struct TALER_EXCHANGE_KycCheckHandle`
* @param response_code HTTP response code, 0 on error
* @param response parsed JSON result, NULL on error
*/
static void
handle_kyc_check_finished (void *cls,
long response_code,
const void *response)
{
struct TALER_EXCHANGE_KycCheckHandle *kch = cls;
const json_t *j = response;
struct TALER_EXCHANGE_KycStatus ks = {
.http_status = (unsigned int) response_code
};
kch->job = NULL;
switch (response_code)
{
case 0:
ks.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
break;
case MHD_HTTP_OK:
GNUNET_break (0); // FIXME
TALER_EXCHANGE_kyc_check_cancel (kch);
return;
case MHD_HTTP_ACCEPTED:
GNUNET_break (0); // FIXME
TALER_EXCHANGE_kyc_check_cancel (kch);
return;
case MHD_HTTP_NO_CONTENT:
GNUNET_break (0); // FIXME
TALER_EXCHANGE_kyc_check_cancel (kch);
return;
case MHD_HTTP_BAD_REQUEST:
ks.ec = TALER_JSON_get_error_code (j);
/* This should never happen, either us or the exchange is buggy
(or API version conflict); just pass JSON reply to the application */
break;
case MHD_HTTP_UNAUTHORIZED:
GNUNET_break (0); // FIXME
TALER_EXCHANGE_kyc_check_cancel (kch);
return;
case MHD_HTTP_NOT_FOUND:
ks.ec = TALER_JSON_get_error_code (j);
TALER_EXCHANGE_kyc_check_cancel (kch);
return;
case MHD_HTTP_INTERNAL_SERVER_ERROR:
ks.ec = TALER_JSON_get_error_code (j);
/* Server had an internal issue; we should retry, but this API
leaves this to the application */
break;
default:
/* unexpected response code */
GNUNET_break_op (0);
ks.ec = TALER_JSON_get_error_code (j);
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Unexpected response code %u/%d for exchange kyc_check\n",
(unsigned int) response_code,
(int) ks.ec);
break;
}
TALER_EXCHANGE_kyc_check_cancel (kch);
}
/**
* Submit a kyc_check request to the exchange and get the exchange's response.
*
* This API is typically not used by anyone, it is more a threat against those
* trying to receive a funds transfer by abusing the refresh protocol.
*
* @param exchange the exchange handle; the exchange must be ready to operate
* @param coin_priv private key to request kyc_check data for
* @param kyc_check_cb the callback to call with the useful result of the
* refresh operation the @a coin_priv was involved in (if any)
* @param kyc_check_cb_cls closure for @a kyc_check_cb
* @return a handle for this request
*/
struct TALER_EXCHANGE_KycCheckHandle *
TALER_EXCHANGE_kyc_check (struct TALER_EXCHANGE_Handle *exchange,
uint64_t payment_target,
const struct GNUNET_HashCode *h_wire,
struct GNUNET_TIME_Relative timeout,
TALER_EXCHANGE_KycStatusCallback cb,
void *cb_cls)
{
struct TALER_EXCHANGE_KycCheckHandle *kch;
CURL *eh;
struct GNUNET_CURL_Context *ctx;
if (GNUNET_YES !=
TEAH_handle_is_ready (exchange))
{
GNUNET_break (0);
return NULL;
}
kch = GNUNET_new (struct TALER_EXCHANGE_KycCheckHandle);
kch->exchange = exchange;
kch->cb = cb;
kch->cb_cls = cb_cls;
kch->url = TEAH_path_to_url (exchange,
"FIXME");
if (NULL == kch->url)
{
GNUNET_free (kch);
return NULL;
}
eh = TALER_EXCHANGE_curl_easy_get_ (kch->url);
if (NULL == eh)
{
GNUNET_break (0);
GNUNET_free (kch->url);
GNUNET_free (kch);
return NULL;
}
ctx = TEAH_handle_to_context (exchange);
kch->job = GNUNET_CURL_job_add_with_ct_json (ctx,
eh,
&handle_kyc_check_finished,
kch);
return kch;
}
/**
* Cancel a kyc_check request. This function cannot be used
* on a request handle if the callback was already invoked.
*
* @param kch the kyc_check handle
*/
void
TALER_EXCHANGE_kyc_check_cancel (struct TALER_EXCHANGE_KycCheckHandle *kch)
{
if (NULL != kch->job)
{
GNUNET_CURL_job_cancel (kch->job);
kch->job = NULL;
}
GNUNET_free (kch->url);
GNUNET_free (kch);
}
/* end of exchange_api_kyc_check.c */
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