diff options
Diffstat (limited to 'src/exchange/taler-exchange-httpd_management_global_fees.c')
| -rw-r--r-- | src/exchange/taler-exchange-httpd_management_global_fees.c | 261 |
1 files changed, 261 insertions, 0 deletions
diff --git a/src/exchange/taler-exchange-httpd_management_global_fees.c b/src/exchange/taler-exchange-httpd_management_global_fees.c new file mode 100644 index 000000000..8203ddefb --- /dev/null +++ b/src/exchange/taler-exchange-httpd_management_global_fees.c @@ -0,0 +1,261 @@ +/* + This file is part of TALER + Copyright (C) 2020, 2021, 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_management_global_fees.c + * @brief Handle request to add global fee details + * @author Christian Grothoff + */ +#include "platform.h" +#include <gnunet/gnunet_util_lib.h> +#include <gnunet/gnunet_json_lib.h> +#include <jansson.h> +#include <microhttpd.h> +#include <pthread.h> +#include "taler_json_lib.h" +#include "taler_mhd_lib.h" +#include "taler_signatures.h" +#include "taler-exchange-httpd_keys.h" +#include "taler-exchange-httpd_management.h" +#include "taler-exchange-httpd_responses.h" + + +/** + * Closure for the #add_fee transaction. + */ +struct AddFeeContext +{ + /** + * Fee's signature affirming the #TALER_SIGNATURE_MASTER_GLOBAL_FEES operation. + */ + struct TALER_MasterSignatureP master_sig; + + /** + * Starting period. + */ + struct GNUNET_TIME_Timestamp start_time; + + /** + * End of period. + */ + struct GNUNET_TIME_Timestamp end_time; + + /** + * Global fee amounts. + */ + struct TALER_GlobalFeeSet fees; + + /** + * When does an unmerged purse expire? + */ + struct GNUNET_TIME_Relative purse_timeout; + + /** + * When does an account without KYC expire? + */ + struct GNUNET_TIME_Relative kyc_timeout; + + /** + * When does an account history expire? + */ + struct GNUNET_TIME_Relative history_expiration; + + /** + * Number of free purses per account. + */ + uint32_t purse_account_limit; + +}; + + +/** + * Function implementing database transaction to add a fee. 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 closure with a `struct AddFeeContext` + * @param connection MHD request which triggered the transaction + * @param[out] mhd_ret set to MHD response status for @a connection, + * if transaction failed (!) + * @return transaction status + */ +static enum GNUNET_DB_QueryStatus +add_fee (void *cls, + struct MHD_Connection *connection, + MHD_RESULT *mhd_ret) +{ + struct AddFeeContext *afc = cls; + enum GNUNET_DB_QueryStatus qs; + struct TALER_GlobalFeeSet fees; + struct GNUNET_TIME_Relative purse_timeout; + struct GNUNET_TIME_Relative history_expiration; + uint32_t purse_account_limit; + + qs = TEH_plugin->lookup_global_fee_by_time ( + TEH_plugin->cls, + afc->start_time, + afc->end_time, + &fees, + &purse_timeout, + &history_expiration, + &purse_account_limit); + if (qs < 0) + { + if (GNUNET_DB_STATUS_SOFT_ERROR == qs) + return qs; + GNUNET_break (0); + *mhd_ret = TALER_MHD_reply_with_error (connection, + MHD_HTTP_INTERNAL_SERVER_ERROR, + TALER_EC_GENERIC_DB_FETCH_FAILED, + "lookup global fee"); + return qs; + } + if (GNUNET_DB_STATUS_SUCCESS_NO_RESULTS != qs) + { + if ( (GNUNET_OK == + TALER_amount_is_valid (&fees.history)) && + (0 == + TALER_global_fee_set_cmp (&fees, + &afc->fees)) ) + { + /* this will trigger the 'success' response */ + return GNUNET_DB_STATUS_SUCCESS_NO_RESULTS; + } + else + { + *mhd_ret = TALER_MHD_reply_with_error ( + connection, + MHD_HTTP_CONFLICT, + TALER_EC_EXCHANGE_MANAGEMENT_GLOBAL_FEE_MISMATCH, + NULL); + } + return GNUNET_DB_STATUS_HARD_ERROR; + } + + qs = TEH_plugin->insert_global_fee ( + TEH_plugin->cls, + afc->start_time, + afc->end_time, + &afc->fees, + afc->purse_timeout, + afc->history_expiration, + afc->purse_account_limit, + &afc->master_sig); + if (qs < 0) + { + if (GNUNET_DB_STATUS_SOFT_ERROR == qs) + return qs; + GNUNET_break (0); + *mhd_ret = TALER_MHD_reply_with_error (connection, + MHD_HTTP_INTERNAL_SERVER_ERROR, + TALER_EC_GENERIC_DB_STORE_FAILED, + "insert fee"); + return qs; + } + return qs; +} + + +MHD_RESULT +TEH_handler_management_post_global_fees ( + struct MHD_Connection *connection, + const json_t *root) +{ + struct AddFeeContext afc; + struct GNUNET_JSON_Specification spec[] = { + GNUNET_JSON_spec_fixed_auto ("master_sig", + &afc.master_sig), + GNUNET_JSON_spec_timestamp ("fee_start", + &afc.start_time), + GNUNET_JSON_spec_timestamp ("fee_end", + &afc.end_time), + TALER_JSON_spec_amount ("history_fee", + TEH_currency, + &afc.fees.history), + TALER_JSON_spec_amount ("account_fee", + TEH_currency, + &afc.fees.account), + TALER_JSON_spec_amount ("purse_fee", + TEH_currency, + &afc.fees.purse), + GNUNET_JSON_spec_relative_time ("purse_timeout", + &afc.purse_timeout), + GNUNET_JSON_spec_relative_time ("history_expiration", + &afc.history_expiration), + GNUNET_JSON_spec_uint32 ("purse_account_limit", + &afc.purse_account_limit), + GNUNET_JSON_spec_end () + }; + + { + enum GNUNET_GenericReturnValue res; + + res = TALER_MHD_parse_json_data (connection, + root, + spec); + if (GNUNET_SYSERR == res) + return MHD_NO; /* hard failure */ + if (GNUNET_NO == res) + return MHD_YES; /* failure */ + } + + TEH_METRICS_num_verifications[TEH_MT_SIGNATURE_EDDSA]++; + if (GNUNET_OK != + TALER_exchange_offline_global_fee_verify ( + afc.start_time, + afc.end_time, + &afc.fees, + afc.purse_timeout, + afc.history_expiration, + afc.purse_account_limit, + &TEH_master_public_key, + &afc.master_sig)) + { + /* signature invalid */ + GNUNET_break_op (0); + return TALER_MHD_reply_with_error ( + connection, + MHD_HTTP_FORBIDDEN, + TALER_EC_EXCHANGE_MANAGEMENT_GLOBAL_FEE_SIGNATURE_INVALID, + NULL); + } + + { + enum GNUNET_GenericReturnValue res; + MHD_RESULT ret; + + res = TEH_DB_run_transaction (connection, + "add global fee", + TEH_MT_REQUEST_OTHER, + &ret, + &add_fee, + &afc); + if (GNUNET_SYSERR == res) + return ret; + } + TEH_keys_update_states (); + return TALER_MHD_reply_static ( + connection, + MHD_HTTP_NO_CONTENT, + NULL, + NULL, + 0); +} + + +/* end of taler-exchange-httpd_management_global_fees.c */ |