sketch logic for wire-fee management endpoint
This commit is contained in:
Christian Grothoff
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3d8abcc041
commit
b65a2f77eb
276
src/exchange/taler-exchange-httpd_management_wire_fees.c
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276
src/exchange/taler-exchange-httpd_management_wire_fees.c
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/*
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This file is part of TALER
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Copyright (C) 2020 Taler Systems SA
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TALER is free software; you can redistribute it and/or modify it under the
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terms of the GNU Affero General Public License as published by the Free Software
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Foundation; either version 3, or (at your option) any later version.
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TALER is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License along with
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TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
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*/
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/**
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* @file taler-exchange-httpd_management_wire_fees.c
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* @brief Handle request to add wire fee details
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* @author Christian Grothoff
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*/
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#include "platform.h"
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#include <gnunet/gnunet_util_lib.h>
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#include <gnunet/gnunet_json_lib.h>
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#include <jansson.h>
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#include <microhttpd.h>
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#include <pthread.h>
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#include "taler_json_lib.h"
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#include "taler_mhd_lib.h"
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#include "taler-exchange-httpd_refund.h"
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#include "taler-exchange-httpd_responses.h"
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#include "taler-exchange-httpd_keystate.h"
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/**
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* Closure for the #add_fee transaction.
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*/
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struct AddFeeContext
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{
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/**
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* Fee's signature affirming the #TALER_SIGNATURE_MASTER_WIRE_FEES operation.
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*/
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struct TALER_MasterSignatureP master_sig;
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/**
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* Wire method this is about.
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*/
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const char *wire_method;
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/**
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* Starting period.
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*/
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struct GNUNET_TIME_Absolute start_time;
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/**
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* End of period.
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*/
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struct GNUNET_TIME_Absolute end_time;
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/**
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* Wire fee amount.
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*/
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struct TALER_Amount wire_fee;
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/**
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* Closing fee amount.
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*/
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struct TALER_Amount closing_fee;
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};
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/**
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* Function implementing database transaction to add a fee. Runs the
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* transaction logic; IF it returns a non-error code, the transaction logic
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* MUST NOT queue a MHD response. IF it returns an hard error, the
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* transaction logic MUST queue a MHD response and set @a mhd_ret. IF it
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* returns the soft error code, the function MAY be called again to retry and
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* MUST not queue a MHD response.
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*
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* @param cls closure with a `struct AddFeeContext`
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* @param connection MHD request which triggered the transaction
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* @param session database session to use
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* @param[out] mhd_ret set to MHD response status for @a connection,
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* if transaction failed (!)
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* @return transaction status
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*/
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static enum GNUNET_DB_QueryStatus
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add_fee (void *cls,
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struct MHD_Connection *connection,
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struct TALER_EXCHANGEDB_Session *session,
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MHD_RESULT *mhd_ret)
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{
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struct AddFeeContext *afc = cls;
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enum GNUNET_DB_QueryStatus qs;
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struct TALER_Amount wire_fee;
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struct TALER_Amount closing_fee;
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qs = TEH_plugin->lookup_wire_fee (
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TEH_plugin->cls,
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session,
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aws->wire_method,
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aws->start_time,
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aws->end_time,
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&wire_fee,
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&closing_fee);
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if (qs < 0)
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{
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if (GNUNET_DB_STATUS_SOFT_ERROR == qs)
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return qs;
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GNUNET_break (0);
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*mhd_ret = TALER_MHD_reply_with_error (connection,
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MHD_HTTP_INTERNAL_SERVER_ERROR,
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TALER_EC_GENERIC_DB_LOOKUP_FAILED,
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"lookup wire fee");
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return qs;
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}
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if (GNUNET_DB_STATUS_SUCCESS_NO_RESULTS != qs)
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{
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if ( (GNUNET_OK ==
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TALER_amount_is_valid (&wire_fee)) &&
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(0 ==
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TALER_amount_cmp (&wire_fee,
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&afc->wire_fee)) &&
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(0 ==
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TALER_amount_cmp (&closing_fee,
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&afc->closing_fee)) )
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{
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/* this will trigger the 'success' response */
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return GNUNET_DB_STATUS_SUCCESS_NO_RESULTS;
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}
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else
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{
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*mhd_ret = TALER_MHD_reply_with_error (connection,
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MHD_HTTP_CONFLICT,
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TALER_EC_XXX,
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NULL);
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}
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return GNUNET_DB_STATUS_HARD_ERROR;
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}
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qs = TEH_plugin->insert_wire_fee (
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TEH_plugin->cls,
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session,
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aws->wire_method,
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aws->start_time,
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aws->end_time,
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&aws->wire_fee,
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&aws->closing_fee,
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&aws->master_sig);
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if (qs < 0)
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{
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if (GNUNET_DB_STATUS_SOFT_ERROR == qs)
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return qs;
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GNUNET_break (0);
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*mhd_ret = TALER_MHD_reply_with_error (connection,
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MHD_HTTP_INTERNAL_SERVER_ERROR,
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TALER_EC_GENERIC_DB_STORE_FAILED,
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"insert fee");
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return qs;
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}
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return qs;
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}
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/**
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* Handle a POST "/management/wire-fees" request.
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*
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* @param connection the MHD connection to handle
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* @param root uploaded JSON data
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* @return MHD result code
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*/
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MHD_RESULT
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TEH_handler_management_post_wire_fees (
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struct MHD_Connection *connection,
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const json_t *root)
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{
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struct AddFeeContext afc;
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struct GNUNET_JSON_Specification spec[] = {
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GNUNET_JSON_spec_fixed_auto ("master_sig",
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&afc.master_sig),
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GNUNET_JSON_spec_string ("wire_method",
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&afc.wire_method),
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TALER_JSON_spec_time_abs ("fee_start",
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&afc.start_time),
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TALER_JSON_spec_time_abs ("fee_end",
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&afc.end_time),
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TALER_JSON_spec_amount ("closing_fee",
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&afc.closing_fee),
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TALER_JSON_spec_amount ("wire_fee",
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&afc.wire_fee),
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GNUNET_JSON_spec_end ()
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};
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enum GNUNET_DB_QueryStatus qs;
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{
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enum GNUNET_GenericReturnValue res;
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res = TALER_MHD_parse_json_data (connection,
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root,
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spec);
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if (GNUNET_SYSERR == res)
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return MHD_NO; /* hard failure */
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if (GNUNET_NO == res)
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return MHD_YES; /* failure */
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}
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if (0 !=
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TALER_amount_cmp_currency (&afc.closing_fee,
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&afc.wire_fee))
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{
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/* currencies of the two fees must be identical */
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GNUNET_break_op (0);
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return TALER_MHD_reply_with_error (connection,
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MHD_HTTP_BAD_REQUEST,
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TALER_EC_GENERIC_BAD_CURRENCY,
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NULL);
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}
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if (0 !=
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strcasecmp (afc.wire_fee.currency,
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TEH_currency))
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{
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/* currency does not match exchange's currency */
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return TALER_MHD_reply_with_error (connection,
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MHD_HTTP_PRECONDITION_FAILED,
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TALER_EC_GENERIC_BAD_CURRENCY,
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TEH_currency);
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}
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{
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struct TALER_MasterWireFeePS wf = {
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.purpose.purpose = htonl (TALER_SIGNATURE_MASTER_WIRE_FEES),
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.purpose.size = htonl (wf),
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.start_date = GNUNET_TIME_absolute_hton (afc.start_date),
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.end_date = GNUNET_TIME_absolute_hton (afc.end_date),
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};
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TALER_amount_hton (&kv.wire_fee,
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&afc.wire_fee);
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TALER_amount_hton (&kv.closing_fee,
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&afc.closing_fee);
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GNUNET_CRYPTO_hash (afc.wire_method,
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strlen (afc.wire_method) + 1,
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&wf.h_wire_method);
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if (GNUNET_OK !=
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GNUNET_CRYPTO_eddsa_verify (
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TALER_SIGNATURE_MASTER_WIRE_FEES,
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&wf,
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&afc.master_sig.eddsa_sig,
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&TEH_master_public_key.eddsa_pub))
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{
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/* signature invalid */
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GNUNET_break_op (0);
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*mhd_ret = TALER_MHD_reply_with_error (connection,
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MHD_HTTP_FORBIDDEN,
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TALER_EC_EXCHANGE_XXX,
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NULL);
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return GNUNET_DB_STATUS_HARD_ERROR;
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}
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}
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qs = TEH_DB_run_transaction (connection,
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"add wire fee",
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&res,
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&add_fee,
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&afc);
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if (qs < 0)
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return res;
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return TALER_MHD_reply_static (
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connection,
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MHD_HTTP_NO_CONTENT,
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NULL,
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NULL,
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0);
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}
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/* end of taler-exchange-httpd_management_wire_fees.c */
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@ -3172,12 +3172,41 @@ struct TALER_EXCHANGEDB_Plugin
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* @return transaction status code
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*/
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enum GNUNET_DB_QueryStatus
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(*insert_auditor_denom_sig)(void *cls,
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struct TALER_EXCHANGEDB_Session *session,
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const struct GNUNET_HashCode *h_denom_pub,
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const struct TALER_AuditorPublicKeyP *auditor_pub,
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const struct
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TALER_AuditorSignatureP *auditor_sig);
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(*insert_auditor_denom_sig)(
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void *cls,
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struct TALER_EXCHANGEDB_Session *session,
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const struct GNUNET_HashCode *h_denom_pub,
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const struct TALER_AuditorPublicKeyP *auditor_pub,
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const struct TALER_AuditorSignatureP *auditor_sig);
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/**
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* Lookup information about known wire fees.
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*
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* @param cls closure
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* @param session a session
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* @param wire_method the wire method to lookup fees for
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* @param start_time starting time of fee
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* @param end_time end time of fee
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* @param[out] wire_fee wire fee for that time period; if
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* different wire fee exists within this time
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* period, an 'invalid' amount is returned.
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* @param[out] closing_fee wire fee for that time period; if
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* different wire fee exists within this time
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* period, an 'invalid' amount is returned.
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* @return transaction status code
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*/
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enum GNUNET_DB_QueryStatus
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(*lookup_wire_fee_by_time)(
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void *cls,
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struct TALER_EXCHANGEDB_Session *session,
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const char *wire_method,
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struct GNUNET_TIME_Absolute start_time,
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struct GNUNET_TIME_Absolute end_time,
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struct TALER_Amount *wire_fee,
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struct TALER_Amount *closing_fee);
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};
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#endif /* _TALER_EXCHANGE_DB_H */
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