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Diffstat (limited to 'src/lib/exchange_api_kyc_wallet.c')
| -rw-r--r-- | src/lib/exchange_api_kyc_wallet.c | 230 |
1 files changed, 230 insertions, 0 deletions
diff --git a/src/lib/exchange_api_kyc_wallet.c b/src/lib/exchange_api_kyc_wallet.c new file mode 100644 index 000000000..7197694ae --- /dev/null +++ b/src/lib/exchange_api_kyc_wallet.c @@ -0,0 +1,230 @@ +/* + 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 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 GNUNET_CURL_Context *ctx, + const char *url, + 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 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, + balance, + &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->cb = cb; + kwh->cb_cls = cb_cls; + kwh->url = TALER_url_join (url, + "kyc-wallet", + NULL); + if (NULL == kwh->url) + { + json_decref (req); + GNUNET_free (kwh); + return NULL; + } + 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 */ |