From dee45bf02284716d5dea18e94193d74e64f7e5bf Mon Sep 17 00:00:00 2001 From: Christian Grothoff Date: Sun, 20 Mar 2022 09:44:42 +0100 Subject: return new global fees from /keys --- src/lib/exchange_api_reserves_history.c | 368 ++++++++++++++++++++++++++++++++ 1 file changed, 368 insertions(+) create mode 100644 src/lib/exchange_api_reserves_history.c (limited to 'src/lib/exchange_api_reserves_history.c') diff --git a/src/lib/exchange_api_reserves_history.c b/src/lib/exchange_api_reserves_history.c new file mode 100644 index 000000000..f7191b2ad --- /dev/null +++ b/src/lib/exchange_api_reserves_history.c @@ -0,0 +1,368 @@ +/* + 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 + +*/ +/** + * @file lib/exchange_api_reserves_history.c + * @brief Implementation of the POST /reserves/$RESERVE_PUB/history requests + * @author Christian Grothoff + */ +#include "platform.h" +#include +#include /* just for HTTP history codes */ +#include +#include +#include +#include "taler_exchange_service.h" +#include "taler_json_lib.h" +#include "exchange_api_handle.h" +#include "taler_signatures.h" +#include "exchange_api_curl_defaults.h" + + +/** + * @brief A /reserves/$RID/history Handle + */ +struct TALER_EXCHANGE_ReservesHistoryHandle +{ + + /** + * 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_ReservesHistoryCallback cb; + + /** + * Public key of the reserve we are querying. + */ + struct TALER_ReservePublicKeyP reserve_pub; + + /** + * Closure for @a cb. + */ + void *cb_cls; + +}; + + +/** + * We received an #MHD_HTTP_OK history code. Handle the JSON + * response. + * + * @param rgh handle of the request + * @param j JSON response + * @return #GNUNET_OK on success + */ +static enum GNUNET_GenericReturnValue +handle_reserves_history_ok (struct TALER_EXCHANGE_ReservesHistoryHandle *rgh, + const json_t *j) +{ + json_t *history; + unsigned int len; + bool kyc_ok; + bool kyc_required; + struct TALER_Amount balance; + struct TALER_Amount balance_from_history; + struct GNUNET_JSON_Specification spec[] = { + TALER_JSON_spec_amount_any ("balance", + &balance), + GNUNET_JSON_spec_bool ("kyc_passed", + &kyc_ok), + GNUNET_JSON_spec_bool ("kyc_required", + &kyc_required), + GNUNET_JSON_spec_json ("history", + &history), + GNUNET_JSON_spec_end () + }; + struct TALER_EXCHANGE_HttpResponse hr = { + .reply = j, + .http_history = MHD_HTTP_OK + }; + + if (GNUNET_OK != + GNUNET_JSON_parse (j, + spec, + NULL, + NULL)) + { + GNUNET_break_op (0); + return GNUNET_SYSERR; + } + len = json_array_size (history); + { + struct TALER_EXCHANGE_ReserveHistory *rhistory; + + rhistory = GNUNET_new_array (len, + struct TALER_EXCHANGE_ReserveHistory); + if (GNUNET_OK != + TALER_EXCHANGE_parse_reserve_history (rgh->exchange, + history, + &rgh->reserve_pub, + balance.currency, + &balance_from_history, + len, + rhistory)) + { + GNUNET_break_op (0); + TALER_EXCHANGE_free_reserve_history (rhistory, + len); + GNUNET_JSON_parse_free (spec); + return GNUNET_SYSERR; + } + if (0 != + TALER_amount_cmp (&balance_from_history, + &balance)) + { + /* exchange cannot add up balances!? */ + GNUNET_break_op (0); + TALER_EXCHANGE_free_reserve_history (rhistory, + len); + GNUNET_JSON_parse_free (spec); + return GNUNET_SYSERR; + } + if (NULL != rgh->cb) + { + rgh->cb (rgh->cb_cls, + &hr, + &balance, + len, + rhistory); + rgh->cb = NULL; + } + TALER_EXCHANGE_free_reserve_history (rhistory, + len); + } + GNUNET_JSON_parse_free (spec); + return GNUNET_OK; +} + + +/** + * Function called when we're done processing the + * HTTP /reserves/$RID/history request. + * + * @param cls the `struct TALER_EXCHANGE_ReservesHistoryHandle` + * @param response_code HTTP response code, 0 on error + * @param response parsed JSON result, NULL on error + */ +static void +handle_reserves_history_finished (void *cls, + long response_code, + const void *response) +{ + struct TALER_EXCHANGE_ReservesHistoryHandle *rgh = cls; + const json_t *j = response; + struct TALER_EXCHANGE_HttpResponse hr = { + .reply = j, + .http_history = (unsigned int) response_code + }; + + rgh->job = NULL; + switch (response_code) + { + case 0: + hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE; + break; + case MHD_HTTP_OK: + if (GNUNET_OK != + handle_reserves_history_ok (rgh, + j)) + { + hr.http_history = 0; + 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); + hr.ec = TALER_JSON_history_error_code (j); + hr.hint = TALER_JSON_history_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); + hr.ec = TALER_JSON_history_error_code (j); + hr.hint = TALER_JSON_history_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 */ + hr.ec = TALER_JSON_history_error_code (j); + hr.hint = TALER_JSON_history_error_hint (j); + break; + case MHD_HTTP_INTERNAL_SERVER_ERROR: + /* Server had an internal issue; we should retry, but this API + leaves this to the application */ + hr.ec = TALER_JSON_history_error_code (j); + hr.hint = TALER_JSON_history_error_hint (j); + break; + default: + /* unexpected response code */ + GNUNET_break_op (0); + hr.ec = TALER_JSON_history_error_code (j); + hr.hint = TALER_JSON_history_error_hint (j); + GNUNET_log (GNUNET_ERROR_TYPE_ERROR, + "Unexpected response code %u/%d for reserves history\n", + (unsigned int) response_code, + (int) hr.ec); + break; + } + if (NULL != rgh->cb) + { + rgh->cb (rgh->cb_cls, + &hr, + NULL, + 0, + NULL); + rgh->cb = NULL; + } + TALER_EXCHANGE_reserves_history_cancel (rgh); +} + + +struct TALER_EXCHANGE_ReservesHistoryHandle * +TALER_EXCHANGE_reserves_history ( + struct TALER_EXCHANGE_Handle *exchange, + const struct TALER_ReservePrivateKeyP *reserve_priv, + TALER_EXCHANGE_ReservesHistoryCallback cb, + void *cb_cls) +{ + struct TALER_EXCHANGE_ReservesHistoryHandle *rgh; + struct GNUNET_CURL_Context *ctx; + CURL *eh; + char arg_str[sizeof (struct TALER_ReservePublicKeyP) * 2 + 32]; + const struct TALER_Amount *history_fee; + const struct TALER_EXCHANGE_Keys *keys; + struct GNUNET_TIME_Timestamp ts + = GNUNET_TIME_timestamp_get (); + + if (GNUNET_YES != + TEAH_handle_is_ready (exchange)) + { + GNUNET_break (0); + return NULL; + } + keys = TALER_EXCHANGE_get_keys (exchange); + // FIXME: extract history_fee from keys! + history_fee = FIXME; + rgh = GNUNET_new (struct TALER_EXCHANGE_ReservesHistoryHandle); + rgh->exchange = exchange; + rgh->cb = cb; + rgh->cb_cls = cb_cls; + GNUNET_CRYPTO_eddsa_key_get_public (&reserve_priv->eddsa_priv, + &rgh->reserve_pub.eddsa_pub); + { + char pub_str[sizeof (struct TALER_ReservePublicKeyP) * 2]; + char *end; + + end = GNUNET_STRINGS_data_to_string ( + &rgh->reserve_pub, + sizeof (rgh->reserve_pub), + pub_str, + sizeof (pub_str)); + *end = '\0'; + GNUNET_snprintf (arg_str, + sizeof (arg_str), + "/reserves/%s/history", + pub_str); + } + rgh->url = TEAH_path_to_url (exchange, + arg_str); + if (NULL == rgh->url) + { + GNUNET_free (rgh); + return NULL; + } + eh = TALER_EXCHANGE_curl_easy_history_ (rgh->url); + if (NULL == eh) + { + GNUNET_break (0); + GNUNET_free (rgh->url); + GNUNET_free (rgh); + return NULL; + } + TALER_wallet_reserve_history_sign (ts, + history_fee, + reserve_priv, + &reserve_sig); + { + json_t *history_obj = GNUNET_JSON_PACK ( + GNUNET_JSON_pack_timestamp ("request_timestamp", + &ts), + GNUNET_JSON_pack_data_auto ("reserve_sig", + &reserve_sig)); + + if (GNUNET_OK != + TALER_curl_easy_post (&rgh->post_ctx, + eh, + history_obj)) + ) + { + GNUNET_break (0); + curl_easy_cleanup (eh); + json_decref (history_obj); + GNUNET_free (rgh->url); + GNUNET_free (rgh); + return NULL; + } + json_decref (history_obj); + } + ctx = TEAH_handle_to_context (exchange); + rgh->job = GNUNET_CURL_job_add (ctx, + eh, + &handle_reserves_history_finished, + rgh); + return rgh; +} + + +void +TALER_EXCHANGE_reserves_history_cancel ( + struct TALER_EXCHANGE_ReservesHistoryHandle *rgh) +{ + if (NULL != rgh->job) + { + GNUNET_CURL_job_cancel (rgh->job); + rgh->job = NULL; + } + TALER_curl_easy_post_finished (&rgh->post_ctx); + GNUNET_free (rgh->url); + GNUNET_free (rgh); +} + + +/* end of exchange_api_reserves_history.c */ -- cgit v1.2.3