diff options
Diffstat (limited to 'src/exchange/taler-exchange-httpd_reserves_history.c')
| -rw-r--r-- | src/exchange/taler-exchange-httpd_reserves_history.c | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/src/exchange/taler-exchange-httpd_reserves_history.c b/src/exchange/taler-exchange-httpd_reserves_history.c new file mode 100644 index 000000000..4115988f9 --- /dev/null +++ b/src/exchange/taler-exchange-httpd_reserves_history.c @@ -0,0 +1,228 @@ +/* + 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 Affero 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 Affero General Public License for more details. + + You should have received a copy of the GNU Affero General Public License along with + TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/> +*/ +/** + * @file taler-exchange-httpd_reserves_history.c + * @brief Handle /reserves/$RESERVE_PUB/history requests + * @author Florian Dold + * @author Benedikt Mueller + * @author Christian Grothoff + */ +#include "platform.h" +#include <gnunet/gnunet_util_lib.h> +#include <jansson.h> +#include "taler_mhd_lib.h" +#include "taler_json_lib.h" +#include "taler_dbevents.h" +#include "taler-exchange-httpd_keys.h" +#include "taler-exchange-httpd_reserves_history.h" +#include "taler-exchange-httpd_responses.h" + + +/** + * Closure for #reserve_history_transaction. + */ +struct ReserveHistoryContext +{ + /** + * Public key of the reserve the inquiry is about. + */ + const struct TALER_ReservePublicKeyP *reserve_pub; + + /** + * Timestamp of the request. + */ + struct GNUNET_TIME_Timestamp timestamp; + + /** + * Client signature approving the request. + */ + struct TALER_ReserveSignatureP reserve_sig; + + /** + * History of the reserve, set in the callback. + */ + struct TALER_EXCHANGEDB_ReserveHistory *rh; + + /** + * Global fees applying to the request. + */ + const struct TEH_GlobalFee *gf; + + /** + * Current reserve balance. + */ + struct TALER_Amount balance; +}; + + +/** + * Send reserve history to client. + * + * @param connection connection to the client + * @param rh reserve history to return + * @return MHD result code + */ +static MHD_RESULT +reply_reserve_history_success (struct MHD_Connection *connection, + const struct ReserveHistoryContext *rhc) +{ + const struct TALER_EXCHANGEDB_ReserveHistory *rh = rhc->rh; + json_t *json_history; + + json_history = TEH_RESPONSE_compile_reserve_history (rh); + if (NULL == json_history) + return TALER_MHD_reply_with_error (connection, + MHD_HTTP_INTERNAL_SERVER_ERROR, + TALER_EC_GENERIC_JSON_ALLOCATION_FAILURE, + NULL); + return TALER_MHD_REPLY_JSON_PACK ( + connection, + MHD_HTTP_OK, + TALER_JSON_pack_amount ("balance", + &rhc->balance), + GNUNET_JSON_pack_array_steal ("history", + json_history)); +} + + +/** + * Function implementing /reserves/$RID/history transaction. Given the public + * key of a reserve, return the associated transaction history. Runs the + * transaction logic; IF it returns a non-error code, the transaction logic + * MUST NOT queue a MHD response. IF it returns an hard error, the + * transaction logic MUST queue a MHD response and set @a mhd_ret. IF it + * returns the soft error code, the function MAY be called again to retry and + * MUST not queue a MHD response. + * + * @param cls a `struct ReserveHistoryContext *` + * @param connection MHD request which triggered the transaction + * @param[out] mhd_ret set to MHD response status for @a connection, + * if transaction failed (!); unused + * @return transaction status + */ +static enum GNUNET_DB_QueryStatus +reserve_history_transaction (void *cls, + struct MHD_Connection *connection, + MHD_RESULT *mhd_ret) +{ + struct ReserveHistoryContext *rsc = cls; + enum GNUNET_DB_QueryStatus qs; + + // FIXME: first deduct rsc->gf->fees.history from balance! + // FIXME: pass rsc.gf->history_expiration? + qs = TEH_plugin->get_reserve_history (TEH_plugin->cls, + rsc->reserve_pub, + &rsc->balance, + &rsc->rh); + if (GNUNET_DB_STATUS_HARD_ERROR == qs) + { + GNUNET_break (0); + *mhd_ret + = TALER_MHD_reply_with_error (connection, + MHD_HTTP_INTERNAL_SERVER_ERROR, + TALER_EC_GENERIC_DB_FETCH_FAILED, + "get_reserve_history"); + } + return qs; +} + + +MHD_RESULT +TEH_handler_reserves_history (struct TEH_RequestContext *rc, + const struct TALER_ReservePublicKeyP *reserve_pub, + const json_t *root) +{ + struct ReserveHistoryContext rsc; + MHD_RESULT mhd_ret; + struct GNUNET_JSON_Specification spec[] = { + GNUNET_JSON_spec_timestamp ("request_timestamp", + &rsc.timestamp), + GNUNET_JSON_spec_fixed_auto ("reserve_sig", + &rsc.reserve_sig), + GNUNET_JSON_spec_end () + }; + struct GNUNET_TIME_Timestamp now; + + rsc.reserve_pub = reserve_pub; + { + enum GNUNET_GenericReturnValue res; + + res = TALER_MHD_parse_json_data (rc->connection, + root, + spec); + if (GNUNET_SYSERR == res) + { + GNUNET_break (0); + return MHD_NO; /* hard failure */ + } + if (GNUNET_NO == res) + { + GNUNET_break_op (0); + return MHD_YES; /* failure */ + } + } + now = GNUNET_TIME_timestamp_get (); + /* FIXME: check that 'timestamp' is close to 'now' */ + + rsc.gf = TEH_keys_global_fee_by_time (TEH_keys_get_state (), + rsc.timestamp); + if (NULL == rsc.gf) + { + GNUNET_break_op (0); + return TALER_MHD_reply_with_error (rc->connection, + MHD_HTTP_INTERNAL_SERVER_ERROR, + TALER_EC_EXCHANGE_GENERIC_BAD_CONFIGURATION, + NULL); + } + if (GNUNET_OK != + TALER_wallet_reserve_history_verify (rsc.timestamp, + &rsc.gf->fees.history, + reserve_pub, + &rsc.reserve_sig)) + { + GNUNET_break_op (0); + return TALER_MHD_reply_with_error (rc->connection, + MHD_HTTP_FORBIDDEN, + TALER_EC_EXCHANGE_RESERVES_HISTORY_BAD_SIGNATURE, + NULL); + } + rsc.rh = NULL; + if (GNUNET_OK != + TEH_DB_run_transaction (rc->connection, + "get reserve history", + TEH_MT_REQUEST_OTHER, + &mhd_ret, + &reserve_history_transaction, + &rsc)) + { + return mhd_ret; + } + if (NULL == rsc.rh) + { + return TALER_MHD_reply_with_error (rc->connection, + MHD_HTTP_NOT_FOUND, + TALER_EC_EXCHANGE_RESERVES_STATUS_UNKNOWN, + NULL); + } + mhd_ret = reply_reserve_history_success (rc->connection, + &rsc); + TEH_plugin->free_reserve_history (TEH_plugin->cls, + rsc.rh); + return mhd_ret; +} + + +/* end of taler-exchange-httpd_reserves_history.c */ |