implement libtalerexchange:reserve_open API
This commit is contained in:
Christian Grothoff
parent
326f99266e
commit
7d8c49b3c7
@ -4916,7 +4916,6 @@ struct TALER_EXCHANGE_AccountMergeResponse
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uint64_t requirement_row;
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} unavailable_for_legal_reasons;
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} details;
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};
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@ -5496,7 +5495,7 @@ TALER_EXCHANGE_reserves_attest (
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/**
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* Cancel a reserve status request. This function cannot be used
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* Cancel a reserve attestation request. This function cannot be used
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* on a request handle if a response is already served for it.
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*
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* @param rah the reserve attest request handle
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@ -62,6 +62,7 @@ libtalerexchange_la_SOURCES = \
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exchange_api_refund.c \
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exchange_api_reserves_get.c \
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exchange_api_reserves_history.c \
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exchange_api_reserves_open.c \
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exchange_api_reserves_status.c \
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exchange_api_transfers_get.c \
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exchange_api_withdraw.c \
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493
src/lib/exchange_api_reserves_open.c
Normal file
493
src/lib/exchange_api_reserves_open.c
Normal file
@ -0,0 +1,493 @@
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/*
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This file is part of TALER
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Copyright (C) 2014-2022 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 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 General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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TALER; see the file COPYING. If not, see
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<http://www.gnu.org/licenses/>
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*/
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/**
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* @file lib/exchange_api_reserves_open.c
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* @brief Implementation of the POST /reserves/$RESERVE_PUB/open requests
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* @author Christian Grothoff
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*/
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#include "platform.h"
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#include <jansson.h>
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#include <microhttpd.h> /* just for HTTP open codes */
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#include <gnunet/gnunet_util_lib.h>
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#include <gnunet/gnunet_json_lib.h>
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#include <gnunet/gnunet_curl_lib.h>
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#include "taler_exchange_service.h"
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#include "taler_json_lib.h"
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#include "exchange_api_handle.h"
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#include "taler_signatures.h"
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#include "exchange_api_curl_defaults.h"
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/**
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* @brief A /reserves/$RID/open Handle
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*/
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struct TALER_EXCHANGE_ReservesOpenHandle
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{
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/**
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* The connection to exchange this request handle will use
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*/
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struct TALER_EXCHANGE_Handle *exchange;
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/**
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* The url for this request.
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*/
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char *url;
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/**
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* Handle for the request.
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*/
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struct GNUNET_CURL_Job *job;
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/**
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* Context for #TEH_curl_easy_post(). Keeps the data that must
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* persist for Curl to make the upload.
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*/
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struct TALER_CURL_PostContext post_ctx;
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/**
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* Function to call with the result.
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*/
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TALER_EXCHANGE_ReservesOpenCallback cb;
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/**
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* Closure for @a cb.
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*/
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void *cb_cls;
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/**
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* Public key of the reserve we are querying.
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*/
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struct TALER_ReservePublicKeyP reserve_pub;
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/**
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* Our signature.
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*/
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struct TALER_ReserveSignatureP reserve_sig;
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/**
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* When did we make the request.
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*/
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struct GNUNET_TIME_Timestamp ts;
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};
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/**
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* We received an #MHD_HTTP_OK open code. Handle the JSON
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* response.
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*
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* @param roh handle of the request
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* @param j JSON response
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* @return #GNUNET_OK on success
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*/
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static enum GNUNET_GenericReturnValue
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handle_reserves_open_ok (struct TALER_EXCHANGE_ReservesOpenHandle *roh,
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const json_t *j)
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{
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struct TALER_EXCHANGE_ReserveOpenResult rs = {
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.hr.reply = j,
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.hr.http_status = MHD_HTTP_OK,
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};
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struct GNUNET_JSON_Specification spec[] = {
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TALER_JSON_spec_amount_any ("open_cost",
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&rs.details.ok.open_cost),
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GNUNET_JSON_spec_timestamp ("reserve_expiration",
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&rs.details.ok.expiration_time),
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GNUNET_JSON_spec_end ()
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};
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if (GNUNET_OK !=
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GNUNET_JSON_parse (j,
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spec,
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NULL,
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NULL))
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{
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GNUNET_break_op (0);
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return GNUNET_SYSERR;
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}
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roh->cb (roh->cb_cls,
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&rs);
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roh->cb = NULL;
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GNUNET_JSON_parse_free (spec);
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return GNUNET_OK;
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}
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/**
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* We received an #MHD_HTTP_PAYMENT_REQUIRED open code. Handle the JSON
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* response.
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*
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* @param roh handle of the request
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* @param j JSON response
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* @return #GNUNET_OK on success
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*/
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static enum GNUNET_GenericReturnValue
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handle_reserves_open_pr (struct TALER_EXCHANGE_ReservesOpenHandle *roh,
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const json_t *j)
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{
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struct TALER_EXCHANGE_ReserveOpenResult rs = {
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.hr.reply = j,
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.hr.http_status = MHD_HTTP_PAYMENT_REQUIRED,
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};
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struct GNUNET_JSON_Specification spec[] = {
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TALER_JSON_spec_amount_any ("open_cost",
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&rs.details.payment_required.open_cost),
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GNUNET_JSON_spec_timestamp ("reserve_expiration",
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&rs.details.payment_required.expiration_time),
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GNUNET_JSON_spec_end ()
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};
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if (GNUNET_OK !=
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GNUNET_JSON_parse (j,
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spec,
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NULL,
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NULL))
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{
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GNUNET_break_op (0);
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return GNUNET_SYSERR;
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}
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roh->cb (roh->cb_cls,
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&rs);
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roh->cb = NULL;
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GNUNET_JSON_parse_free (spec);
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return GNUNET_OK;
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}
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/**
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* We received an #MHD_HTTP_UNAVAILABLE_FOR_LEGAL_REASONS open code. Handle the JSON
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* response.
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*
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* @param roh handle of the request
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* @param j JSON response
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* @return #GNUNET_OK on success
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*/
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static enum GNUNET_GenericReturnValue
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handle_reserves_open_kyc (struct TALER_EXCHANGE_ReservesOpenHandle *roh,
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const json_t *j)
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{
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struct TALER_EXCHANGE_ReserveOpenResult rs = {
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.hr.reply = j,
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.hr.http_status = MHD_HTTP_UNAVAILABLE_FOR_LEGAL_REASONS,
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};
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struct GNUNET_JSON_Specification spec[] = {
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GNUNET_JSON_spec_fixed_auto (
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"h_payto",
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&rs.details.unavailable_for_legal_reasons.h_payto),
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GNUNET_JSON_spec_uint64 (
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"requirement_row",
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&rs.details.unavailable_for_legal_reasons.requirement_row),
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GNUNET_JSON_spec_end ()
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};
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if (GNUNET_OK !=
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GNUNET_JSON_parse (j,
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spec,
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NULL,
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NULL))
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{
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GNUNET_break_op (0);
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return GNUNET_SYSERR;
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}
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roh->cb (roh->cb_cls,
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&rs);
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roh->cb = NULL;
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GNUNET_JSON_parse_free (spec);
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return GNUNET_OK;
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}
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/**
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* Function called when we're done processing the
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* HTTP /reserves/$RID/open request.
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*
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* @param cls the `struct TALER_EXCHANGE_ReservesOpenHandle`
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* @param response_code HTTP response code, 0 on error
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* @param response parsed JSON result, NULL on error
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*/
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static void
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handle_reserves_open_finished (void *cls,
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long response_code,
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const void *response)
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{
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struct TALER_EXCHANGE_ReservesOpenHandle *roh = cls;
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const json_t *j = response;
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struct TALER_EXCHANGE_ReserveOpenResult rs = {
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.hr.reply = j,
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.hr.http_status = (unsigned int) response_code
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};
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roh->job = NULL;
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switch (response_code)
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{
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case 0:
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rs.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
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break;
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case MHD_HTTP_OK:
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if (GNUNET_OK !=
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handle_reserves_open_ok (roh,
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j))
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{
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GNUNET_break_op (0);
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rs.hr.http_status = 0;
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rs.hr.ec = TALER_EC_GENERIC_REPLY_MALFORMED;
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}
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break;
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case MHD_HTTP_BAD_REQUEST:
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/* This should never happen, either us or the exchange is buggy
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(or API version conflict); just pass JSON reply to the application */
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GNUNET_break (0);
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rs.hr.ec = TALER_JSON_get_error_code (j);
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rs.hr.hint = TALER_JSON_get_error_hint (j);
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break;
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case MHD_HTTP_PAYMENT_REQUIRED:
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if (GNUNET_OK !=
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handle_reserves_open_pr (roh,
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j))
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{
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GNUNET_break_op (0);
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rs.hr.http_status = 0;
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rs.hr.ec = TALER_EC_GENERIC_REPLY_MALFORMED;
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}
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break;
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case MHD_HTTP_FORBIDDEN:
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/* This should never happen, either us or the exchange is buggy
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(or API version conflict); just pass JSON reply to the application */
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GNUNET_break (0);
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rs.hr.ec = TALER_JSON_get_error_code (j);
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rs.hr.hint = TALER_JSON_get_error_hint (j);
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break;
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case MHD_HTTP_NOT_FOUND:
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/* Nothing really to verify, this should never
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happen, we should pass the JSON reply to the application */
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rs.hr.ec = TALER_JSON_get_error_code (j);
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rs.hr.hint = TALER_JSON_get_error_hint (j);
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break;
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case MHD_HTTP_UNAVAILABLE_FOR_LEGAL_REASONS:
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if (GNUNET_OK !=
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handle_reserves_open_kyc (roh,
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j))
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{
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GNUNET_break_op (0);
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rs.hr.http_status = 0;
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rs.hr.ec = TALER_EC_GENERIC_REPLY_MALFORMED;
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}
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break;
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case MHD_HTTP_INTERNAL_SERVER_ERROR:
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/* Server had an internal issue; we should retry, but this API
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leaves this to the application */
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rs.hr.ec = TALER_JSON_get_error_code (j);
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rs.hr.hint = TALER_JSON_get_error_hint (j);
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break;
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default:
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/* unexpected response code */
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GNUNET_break_op (0);
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rs.hr.ec = TALER_JSON_get_error_code (j);
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rs.hr.hint = TALER_JSON_get_error_hint (j);
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GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
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"Unexpected response code %u/%d for reserves open\n",
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(unsigned int) response_code,
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(int) rs.hr.ec);
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break;
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}
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if (NULL != roh->cb)
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{
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roh->cb (roh->cb_cls,
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&rs);
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roh->cb = NULL;
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}
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TALER_EXCHANGE_reserves_open_cancel (roh);
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}
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struct TALER_EXCHANGE_ReservesOpenHandle *
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TALER_EXCHANGE_reserves_open (
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struct TALER_EXCHANGE_Handle *exchange,
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const struct TALER_ReservePrivateKeyP *reserve_priv,
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const struct TALER_Amount *reserve_contribution,
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unsigned int coin_payments_length,
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const struct TALER_EXCHANGE_PurseDeposit *coin_payments,
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struct GNUNET_TIME_Timestamp expiration_time,
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uint32_t min_purses,
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TALER_EXCHANGE_ReservesOpenCallback cb,
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void *cb_cls)
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{
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struct TALER_EXCHANGE_ReservesOpenHandle *roh;
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struct GNUNET_CURL_Context *ctx;
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CURL *eh;
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char arg_str[sizeof (struct TALER_ReservePublicKeyP) * 2 + 32];
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const struct TALER_EXCHANGE_Keys *keys;
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json_t *cpa;
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if (GNUNET_YES !=
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TEAH_handle_is_ready (exchange))
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{
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GNUNET_break (0);
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return NULL;
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}
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roh = GNUNET_new (struct TALER_EXCHANGE_ReservesOpenHandle);
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roh->exchange = exchange;
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roh->cb = cb;
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roh->cb_cls = cb_cls;
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roh->ts = GNUNET_TIME_timestamp_get ();
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GNUNET_CRYPTO_eddsa_key_get_public (&reserve_priv->eddsa_priv,
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&roh->reserve_pub.eddsa_pub);
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{
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char pub_str[sizeof (struct TALER_ReservePublicKeyP) * 2];
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char *end;
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end = GNUNET_STRINGS_data_to_string (
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&roh->reserve_pub,
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sizeof (roh->reserve_pub),
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pub_str,
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sizeof (pub_str));
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*end = '\0';
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GNUNET_snprintf (arg_str,
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sizeof (arg_str),
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"/reserves/%s/open",
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pub_str);
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}
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roh->url = TEAH_path_to_url (exchange,
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arg_str);
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if (NULL == roh->url)
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{
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GNUNET_free (roh);
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return NULL;
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}
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eh = TALER_EXCHANGE_curl_easy_get_ (roh->url);
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if (NULL == eh)
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{
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GNUNET_break (0);
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GNUNET_free (roh->url);
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GNUNET_free (roh);
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return NULL;
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}
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keys = TALER_EXCHANGE_get_keys (exchange);
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if (NULL == keys)
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{
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GNUNET_break (0);
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curl_easy_cleanup (eh);
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GNUNET_free (roh->url);
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GNUNET_free (roh);
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return NULL;
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}
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cpa = json_array ();
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GNUNET_assert (NULL != cpa);
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for (unsigned int i = 0; i<coin_payments_length; i++)
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{
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const struct TALER_EXCHANGE_PurseDeposit *pd = &coin_payments[i];
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struct TALER_CoinSpendSignatureP coin_sig;
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struct TALER_CoinSpendPublicKeyP coin_pub;
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const struct TALER_AgeCommitmentProof *acp = pd->age_commitment_proof;
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struct TALER_AgeCommitmentHash ahac;
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struct TALER_AgeCommitmentHash *achp = NULL;
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json_t *cp;
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if (NULL != acp)
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{
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TALER_age_commitment_hash (&acp->commitment,
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&ahac);
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achp = &ahac;
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}
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TALER_wallet_reserve_open_deposit_sign (&pd->amount,
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&roh->reserve_pub,
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roh->ts,
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&pd->coin_priv,
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&coin_sig);
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GNUNET_CRYPTO_eddsa_key_get_public (&pd->coin_priv.eddsa_priv,
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&coin_pub.eddsa_pub);
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cp = GNUNET_JSON_PACK (
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GNUNET_JSON_pack_allow_null (
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GNUNET_JSON_pack_data_auto ("h_age_commitment",
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achp)),
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TALER_JSON_pack_amount ("amount",
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&pd->amount),
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GNUNET_JSON_pack_data_auto ("denom_pub_hash",
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&pd->h_denom_pub),
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TALER_JSON_pack_denom_sig ("ub_sig",
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&pd->denom_sig),
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GNUNET_JSON_pack_data_auto ("coin_pub",
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&coin_pub),
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GNUNET_JSON_pack_data_auto ("coin_sig",
|
||||
&coin_sig));
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GNUNET_assert (0 ==
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json_array_append_new (cpa,
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cp));
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||||
}
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TALER_wallet_reserve_open_sign (reserve_contribution,
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roh->ts,
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expiration_time,
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min_purses,
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reserve_priv,
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&roh->reserve_sig);
|
||||
{
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json_t *open_obj = GNUNET_JSON_PACK (
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GNUNET_JSON_pack_timestamp ("request_timestamp",
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roh->ts),
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||||
GNUNET_JSON_pack_timestamp ("reserve_expiration",
|
||||
expiration_time),
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||||
GNUNET_JSON_pack_array_steal ("payments",
|
||||
cpa),
|
||||
TALER_JSON_pack_amount ("reserve_payment",
|
||||
reserve_contribution),
|
||||
GNUNET_JSON_pack_uint64 ("min_purses",
|
||||
min_purses),
|
||||
GNUNET_JSON_pack_data_auto ("reserve_sig",
|
||||
&roh->reserve_sig));
|
||||
|
||||
if (GNUNET_OK !=
|
||||
TALER_curl_easy_post (&roh->post_ctx,
|
||||
eh,
|
||||
open_obj))
|
||||
{
|
||||
GNUNET_break (0);
|
||||
curl_easy_cleanup (eh);
|
||||
json_decref (open_obj);
|
||||
GNUNET_free (roh->url);
|
||||
GNUNET_free (roh);
|
||||
return NULL;
|
||||
}
|
||||
json_decref (open_obj);
|
||||
}
|
||||
ctx = TEAH_handle_to_context (exchange);
|
||||
roh->job = GNUNET_CURL_job_add2 (ctx,
|
||||
eh,
|
||||
roh->post_ctx.headers,
|
||||
&handle_reserves_open_finished,
|
||||
roh);
|
||||
return roh;
|
||||
}
|
||||
|
||||
|
||||
void
|
||||
TALER_EXCHANGE_reserves_open_cancel (
|
||||
struct TALER_EXCHANGE_ReservesOpenHandle *roh)
|
||||
{
|
||||
if (NULL != roh->job)
|
||||
{
|
||||
GNUNET_CURL_job_cancel (roh->job);
|
||||
roh->job = NULL;
|
||||
}
|
||||
TALER_curl_easy_post_finished (&roh->post_ctx);
|
||||
GNUNET_free (roh->url);
|
||||
GNUNET_free (roh);
|
||||
}
|
||||
|
||||
|
||||
/* end of exchange_api_reserves_open.c */
|
||||
Loading…
Reference in New Issue
Block a user