diff options
Diffstat (limited to 'src/lib')
| -rw-r--r-- | src/lib/Makefile.am | 1 | ||||
| -rw-r--r-- | src/lib/exchange_api_reserves_close.c | 385 | ||||
| -rw-r--r-- | src/lib/exchange_api_reserves_open.c | 7 |
3 files changed, 393 insertions, 0 deletions
diff --git a/src/lib/Makefile.am b/src/lib/Makefile.am index 959cdc7ed..73ae3003d 100644 --- a/src/lib/Makefile.am +++ b/src/lib/Makefile.am @@ -60,6 +60,7 @@ libtalerexchange_la_SOURCES = \ exchange_api_refresh_common.c exchange_api_refresh_common.h \ exchange_api_refreshes_reveal.c \ exchange_api_refund.c \ + exchange_api_reserves_close.c \ exchange_api_reserves_get.c \ exchange_api_reserves_history.c \ exchange_api_reserves_open.c \ diff --git a/src/lib/exchange_api_reserves_close.c b/src/lib/exchange_api_reserves_close.c new file mode 100644 index 000000000..278d13101 --- /dev/null +++ b/src/lib/exchange_api_reserves_close.c @@ -0,0 +1,385 @@ +/* + This file is part of TALER + Copyright (C) 2014-2022 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_reserves_close.c + * @brief Implementation of the POST /reserves/$RESERVE_PUB/close requests + * @author Christian Grothoff + */ +#include "platform.h" +#include <jansson.h> +#include <microhttpd.h> /* just for HTTP close codes */ +#include <gnunet/gnunet_util_lib.h> +#include <gnunet/gnunet_json_lib.h> +#include <gnunet/gnunet_curl_lib.h> +#include "taler_exchange_service.h" +#include "taler_json_lib.h" +#include "exchange_api_handle.h" +#include "taler_signatures.h" +#include "exchange_api_curl_defaults.h" + + +/** + * @brief A /reserves/$RID/close Handle + */ +struct TALER_EXCHANGE_ReservesCloseHandle +{ + + /** + * 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; + + /** + * Context for #TEH_curl_easy_post(). Keeps the data that must + * persist for Curl to make the upload. + */ + struct TALER_CURL_PostContext post_ctx; + + /** + * Function to call with the result. + */ + TALER_EXCHANGE_ReservesCloseCallback cb; + + /** + * Closure for @a cb. + */ + void *cb_cls; + + /** + * Public key of the reserve we are querying. + */ + struct TALER_ReservePublicKeyP reserve_pub; + + /** + * Our signature. + */ + struct TALER_ReserveSignatureP reserve_sig; + + /** + * When did we make the request. + */ + struct GNUNET_TIME_Timestamp ts; + +}; + + +/** + * We received an #MHD_HTTP_OK close code. Handle the JSON + * response. + * + * @param rch handle of the request + * @param j JSON response + * @return #GNUNET_OK on success + */ +static enum GNUNET_GenericReturnValue +handle_reserves_close_ok (struct TALER_EXCHANGE_ReservesCloseHandle *rch, + const json_t *j) +{ + struct TALER_EXCHANGE_ReserveCloseResult rs = { + .hr.reply = j, + .hr.http_status = MHD_HTTP_OK, + }; + struct GNUNET_JSON_Specification spec[] = { + TALER_JSON_spec_amount_any ("wire_amount", + &rs.details.ok.wire_amount), + GNUNET_JSON_spec_end () + }; + + if (GNUNET_OK != + GNUNET_JSON_parse (j, + spec, + NULL, + NULL)) + { + GNUNET_break_op (0); + return GNUNET_SYSERR; + } + rch->cb (rch->cb_cls, + &rs); + rch->cb = NULL; + GNUNET_JSON_parse_free (spec); + return GNUNET_OK; +} + + +/** + * We received an #MHD_HTTP_UNAVAILABLE_FOR_LEGAL_REASONS close code. Handle the JSON + * response. + * + * @param rch handle of the request + * @param j JSON response + * @return #GNUNET_OK on success + */ +static enum GNUNET_GenericReturnValue +handle_reserves_close_kyc (struct TALER_EXCHANGE_ReservesCloseHandle *rch, + const json_t *j) +{ + struct TALER_EXCHANGE_ReserveCloseResult rs = { + .hr.reply = j, + .hr.http_status = MHD_HTTP_UNAVAILABLE_FOR_LEGAL_REASONS, + }; + struct GNUNET_JSON_Specification spec[] = { + GNUNET_JSON_spec_fixed_auto ( + "h_payto", + &rs.details.unavailable_for_legal_reasons.h_payto), + GNUNET_JSON_spec_uint64 ( + "requirement_row", + &rs.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); + return GNUNET_SYSERR; + } + rch->cb (rch->cb_cls, + &rs); + rch->cb = NULL; + GNUNET_JSON_parse_free (spec); + return GNUNET_OK; +} + + +/** + * Function called when we're done processing the + * HTTP /reserves/$RID/close request. + * + * @param cls the `struct TALER_EXCHANGE_ReservesCloseHandle` + * @param response_code HTTP response code, 0 on error + * @param response parsed JSON result, NULL on error + */ +static void +handle_reserves_close_finished (void *cls, + long response_code, + const void *response) +{ + struct TALER_EXCHANGE_ReservesCloseHandle *rch = cls; + const json_t *j = response; + struct TALER_EXCHANGE_ReserveCloseResult rs = { + .hr.reply = j, + .hr.http_status = (unsigned int) response_code + }; + + rch->job = NULL; + switch (response_code) + { + case 0: + rs.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE; + break; + case MHD_HTTP_OK: + if (GNUNET_OK != + handle_reserves_close_ok (rch, + j)) + { + GNUNET_break_op (0); + rs.hr.http_status = 0; + rs.hr.ec = TALER_EC_GENERIC_REPLY_MALFORMED; + } + break; + case MHD_HTTP_BAD_REQUEST: + /* This should never happen, either us or the exchange is buggy + (or API version conflict); just pass JSON reply to the application */ + GNUNET_break (0); + rs.hr.ec = TALER_JSON_get_error_code (j); + rs.hr.hint = TALER_JSON_get_error_hint (j); + break; + case MHD_HTTP_FORBIDDEN: + /* This should never happen, either us or the exchange is buggy + (or API version conflict); just pass JSON reply to the application */ + GNUNET_break (0); + rs.hr.ec = TALER_JSON_get_error_code (j); + rs.hr.hint = TALER_JSON_get_error_hint (j); + break; + case MHD_HTTP_NOT_FOUND: + /* Nothing really to verify, this should never + happen, we should pass the JSON reply to the application */ + rs.hr.ec = TALER_JSON_get_error_code (j); + rs.hr.hint = TALER_JSON_get_error_hint (j); + break; + case MHD_HTTP_CONFLICT: + /* Insufficient balance to inquire for reserve close */ + rs.hr.ec = TALER_JSON_get_error_code (j); + rs.hr.hint = TALER_JSON_get_error_hint (j); + break; + case MHD_HTTP_UNAVAILABLE_FOR_LEGAL_REASONS: + if (GNUNET_OK != + handle_reserves_close_kyc (rch, + j)) + { + GNUNET_break_op (0); + rs.hr.http_status = 0; + rs.hr.ec = TALER_EC_GENERIC_REPLY_MALFORMED; + } + break; + case MHD_HTTP_INTERNAL_SERVER_ERROR: + /* Server had an internal issue; we should retry, but this API + leaves this to the application */ + rs.hr.ec = TALER_JSON_get_error_code (j); + rs.hr.hint = TALER_JSON_get_error_hint (j); + break; + default: + /* unexpected response code */ + GNUNET_break_op (0); + rs.hr.ec = TALER_JSON_get_error_code (j); + rs.hr.hint = TALER_JSON_get_error_hint (j); + GNUNET_log (GNUNET_ERROR_TYPE_ERROR, + "Unexpected response code %u/%d for reserves close\n", + (unsigned int) response_code, + (int) rs.hr.ec); + break; + } + if (NULL != rch->cb) + { + rch->cb (rch->cb_cls, + &rs); + rch->cb = NULL; + } + TALER_EXCHANGE_reserves_close_cancel (rch); +} + + +struct TALER_EXCHANGE_ReservesCloseHandle * +TALER_EXCHANGE_reserves_close ( + struct TALER_EXCHANGE_Handle *exchange, + const struct TALER_ReservePrivateKeyP *reserve_priv, + const char *target_payto_uri, + TALER_EXCHANGE_ReservesCloseCallback cb, + void *cb_cls) +{ + struct TALER_EXCHANGE_ReservesCloseHandle *rch; + struct GNUNET_CURL_Context *ctx; + CURL *eh; + char arg_str[sizeof (struct TALER_ReservePublicKeyP) * 2 + 32]; + struct TALER_PaytoHashP h_payto; + + if (GNUNET_YES != + TEAH_handle_is_ready (exchange)) + { + GNUNET_break (0); + return NULL; + } + rch = GNUNET_new (struct TALER_EXCHANGE_ReservesCloseHandle); + rch->exchange = exchange; + rch->cb = cb; + rch->cb_cls = cb_cls; + rch->ts = GNUNET_TIME_timestamp_get (); + GNUNET_CRYPTO_eddsa_key_get_public (&reserve_priv->eddsa_priv, + &rch->reserve_pub.eddsa_pub); + { + char pub_str[sizeof (struct TALER_ReservePublicKeyP) * 2]; + char *end; + + end = GNUNET_STRINGS_data_to_string ( + &rch->reserve_pub, + sizeof (rch->reserve_pub), + pub_str, + sizeof (pub_str)); + *end = '\0'; + GNUNET_snprintf (arg_str, + sizeof (arg_str), + "/reserves/%s/close", + pub_str); + } + rch->url = TEAH_path_to_url (exchange, + arg_str); + if (NULL == rch->url) + { + GNUNET_free (rch); + return NULL; + } + eh = TALER_EXCHANGE_curl_easy_get_ (rch->url); + if (NULL == eh) + { + GNUNET_break (0); + GNUNET_free (rch->url); + GNUNET_free (rch); + return NULL; + } + if (NULL != target_payto_uri) + TALER_payto_hash (target_payto_uri, + &h_payto); + TALER_wallet_reserve_close_sign (rch->ts, + (NULL != target_payto_uri) + ? &h_payto + : NULL, + reserve_priv, + &rch->reserve_sig); + { + json_t *close_obj = GNUNET_JSON_PACK ( + GNUNET_JSON_pack_allow_null ( + GNUNET_JSON_pack_string ("payto_uri", + target_payto_uri)), + GNUNET_JSON_pack_timestamp ("request_timestamp", + rch->ts), + GNUNET_JSON_pack_data_auto ("reserve_sig", + &rch->reserve_sig)); + + if (GNUNET_OK != + TALER_curl_easy_post (&rch->post_ctx, + eh, + close_obj)) + { + GNUNET_break (0); + curl_easy_cleanup (eh); + json_decref (close_obj); + GNUNET_free (rch->url); + GNUNET_free (rch); + return NULL; + } + json_decref (close_obj); + } + ctx = TEAH_handle_to_context (exchange); + rch->job = GNUNET_CURL_job_add2 (ctx, + eh, + rch->post_ctx.headers, + &handle_reserves_close_finished, + rch); + return rch; +} + + +void +TALER_EXCHANGE_reserves_close_cancel ( + struct TALER_EXCHANGE_ReservesCloseHandle *rch) +{ + if (NULL != rch->job) + { + GNUNET_CURL_job_cancel (rch->job); + rch->job = NULL; + } + TALER_curl_easy_post_finished (&rch->post_ctx); + GNUNET_free (rch->url); + GNUNET_free (rch); +} + + +/* end of exchange_api_reserves_close.c */ diff --git a/src/lib/exchange_api_reserves_open.c b/src/lib/exchange_api_reserves_open.c index 8f3fab172..eb63f8fe9 100644 --- a/src/lib/exchange_api_reserves_open.c +++ b/src/lib/exchange_api_reserves_open.c @@ -278,6 +278,13 @@ handle_reserves_open_finished (void *cls, rs.hr.ec = TALER_JSON_get_error_code (j); rs.hr.hint = TALER_JSON_get_error_hint (j); break; + case MHD_HTTP_CONFLICT: + // FIXME: not yet specified, but needed in + // case of double-spending or insufficient + // reserve balance! + rs.hr.ec = TALER_JSON_get_error_code (j); + rs.hr.hint = TALER_JSON_get_error_hint (j); + break; case MHD_HTTP_UNAVAILABLE_FOR_LEGAL_REASONS: if (GNUNET_OK != handle_reserves_open_kyc (roh, |