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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_wallet.c
* @brief Implementation of the /kyc-wallet request
* @author Christian Grothoff
*/
#include "platform.h"
#include <microhttpd.h> /* just for HTTP wallet 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-wallet`` handle
*/
struct TALER_EXCHANGE_KycWalletHandle
{
/**
* Context for #TEH_curl_easy_post(). Keeps the data that must
* persist for Curl to make the upload.
*/
struct TALER_CURL_PostContext ctx;
/**
* 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_KycWalletCallback cb;
/**
* Closure for @e cb.
*/
void *cb_cls;
};
/**
* Function called when we're done processing the
* HTTP /kyc-wallet request.
*
* @param cls the `struct TALER_EXCHANGE_KycWalletHandle`
* @param response_code HTTP response code, 0 on error
* @param response parsed JSON result, NULL on error
*/
static void
handle_kyc_wallet_finished (void *cls,
long response_code,
const void *response)
{
struct TALER_EXCHANGE_KycWalletHandle *kwh = cls;
const json_t *j = response;
struct TALER_EXCHANGE_WalletKycResponse ks = {
.http_status = (unsigned int) response_code
};
kwh->job = NULL;
switch (response_code)
{
case 0:
ks.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
break;
case MHD_HTTP_NO_CONTENT:
break;
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_FORBIDDEN:
ks.ec = TALER_JSON_get_error_code (j);
break;
case MHD_HTTP_NOT_FOUND:
ks.ec = TALER_JSON_get_error_code (j);
break;
case MHD_HTTP_UNAVAILABLE_FOR_LEGAL_REASONS:
{
struct GNUNET_JSON_Specification spec[] = {
GNUNET_JSON_spec_fixed_auto (
"h_payto",
&ks.details.unavailable_for_legal_reasons.h_payto),
GNUNET_JSON_spec_uint64 (
"requirement_row",
&ks.details.unavailable_for_legal_reasons.requirement_row),
GNUNET_JSON_spec_end ()
};
if (GNUNET_OK !=
GNUNET_JSON_parse (j,
spec,
NULL, NULL))
{
GNUNET_break_op (0);
ks.http_status = 0;
ks.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
break;
}
break;
}
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-wallet\n",
(unsigned int) response_code,
(int) ks.ec);
break;
}
kwh->cb (kwh->cb_cls,
&ks);
TALER_EXCHANGE_kyc_wallet_cancel (kwh);
}
struct TALER_EXCHANGE_KycWalletHandle *
TALER_EXCHANGE_kyc_wallet (struct TALER_EXCHANGE_Handle *exchange,
const struct TALER_ReservePrivateKeyP *reserve_priv,
const struct TALER_Amount *balance,
TALER_EXCHANGE_KycWalletCallback cb,
void *cb_cls)
{
struct TALER_EXCHANGE_KycWalletHandle *kwh;
CURL *eh;
json_t *req;
struct GNUNET_CURL_Context *ctx;
struct TALER_ReservePublicKeyP reserve_pub;
struct TALER_ReserveSignatureP reserve_sig;
GNUNET_CRYPTO_eddsa_key_get_public (&reserve_priv->eddsa_priv,
&reserve_pub.eddsa_pub);
TALER_wallet_account_setup_sign (reserve_priv,
&reserve_sig);
req = GNUNET_JSON_PACK (
TALER_JSON_pack_amount ("balance",
balance),
GNUNET_JSON_pack_data_auto ("reserve_pub",
&reserve_pub),
GNUNET_JSON_pack_data_auto ("reserve_sig",
&reserve_sig));
GNUNET_assert (NULL != req);
kwh = GNUNET_new (struct TALER_EXCHANGE_KycWalletHandle);
kwh->exchange = exchange;
kwh->cb = cb;
kwh->cb_cls = cb_cls;
kwh->url = TEAH_path_to_url (exchange,
"/kyc-wallet");
if (NULL == kwh->url)
{
json_decref (req);
GNUNET_free (kwh);
return NULL;
}
ctx = TEAH_handle_to_context (exchange);
eh = TALER_EXCHANGE_curl_easy_get_ (kwh->url);
if ( (NULL == eh) ||
(GNUNET_OK !=
TALER_curl_easy_post (&kwh->ctx,
eh,
req)) )
{
GNUNET_break (0);
if (NULL != eh)
curl_easy_cleanup (eh);
json_decref (req);
GNUNET_free (kwh->url);
GNUNET_free (kwh);
return NULL;
}
json_decref (req);
kwh->job = GNUNET_CURL_job_add2 (ctx,
eh,
kwh->ctx.headers,
&handle_kyc_wallet_finished,
kwh);
return kwh;
}
void
TALER_EXCHANGE_kyc_wallet_cancel (struct TALER_EXCHANGE_KycWalletHandle *kwh)
{
if (NULL != kwh->job)
{
GNUNET_CURL_job_cancel (kwh->job);
kwh->job = NULL;
}
GNUNET_free (kwh->url);
TALER_curl_easy_post_finished (&kwh->ctx);
GNUNET_free (kwh);
}
/* end of exchange_api_kyc_wallet.c */
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