implement libtalerexchange:reserve_close API
This commit is contained in:
Christian Grothoff
parent
7d8c49b3c7
commit
0de4db7755
@ -3059,7 +3059,16 @@ TALER_wallet_account_merge_verify (
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/**
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* FIXME.
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* Sign a request to keep a reserve open.
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*
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* @param reserve_payment how much to pay from the
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* reserve's own balance for opening the reserve
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* @param request_timestamp when was the request created
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* @param reserve_expiration desired expiration time for the reserve
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* @param purse_limit minimum number of purses the client
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* wants to have concurrently open for this reserve
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* @param reserve_priv key identifying the reserve
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* @param[out] reserve_sig resulting signature
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*/
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void
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TALER_wallet_reserve_open_sign (
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@ -3072,7 +3081,17 @@ TALER_wallet_reserve_open_sign (
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/**
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* FIXME.
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* Verify a request to keep a reserve open.
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*
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* @param reserve_payment how much to pay from the
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* reserve's own balance for opening the reserve
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* @param request_timestamp when was the request created
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* @param reserve_expiration desired expiration time for the reserve
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* @param purse_limit minimum number of purses the client
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* wants to have concurrently open for this reserve
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* @param reserve_pub key identifying the reserve
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* @param reserve_sig resulting signature
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* @return #GNUNET_OK if the signature is valid
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*/
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enum GNUNET_GenericReturnValue
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TALER_wallet_reserve_open_verify (
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@ -3085,7 +3104,13 @@ TALER_wallet_reserve_open_verify (
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/**
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* FIXME.
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* Sign to deposit coin to pay for keeping a reserve open.
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*
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* @param coin_contribution how much the coin should contribute
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* @param reserve_pub public key of the reserve
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* @param request_timestamp time of the open request
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* @param coin_priv private key of the coin
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* @param[out] coin_sig signature by the coin
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*/
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void
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TALER_wallet_reserve_open_deposit_sign (
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@ -3097,7 +3122,14 @@ TALER_wallet_reserve_open_deposit_sign (
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/**
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* FIXME.
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* Verify signature that deposits coin to pay for keeping a reserve open.
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*
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* @param coin_contribution how much the coin should contribute
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* @param reserve_pub public key of the reserve
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* @param request_timestamp time of the open request
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* @param coin_pub public key of the coin
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* @param coin_sig signature by the coin
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* @return #GNUNET_OK if the signature is valid
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*/
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enum GNUNET_GenericReturnValue
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TALER_wallet_reserve_open_deposit_verify (
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@ -5538,8 +5538,31 @@ struct TALER_EXCHANGE_ReserveCloseResult
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struct
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{
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/**
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* Amount wired to the target account.
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*/
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struct TALER_Amount wire_amount;
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} ok;
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/**
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* Information returned if KYC is required to proceed, set if
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* @e hr.http_status is #MHD_HTTP_UNAVAILABLE_FOR_LEGAL_REASONS.
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*/
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struct
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{
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/**
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* Requirement row that the merchant should use
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* to check for its KYC status.
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*/
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uint64_t requirement_row;
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/**
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* Hash of the payto-URI of the account to KYC;
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*/
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struct TALER_PaytoHashP h_payto;
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} unavailable_for_legal_reasons;
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} details;
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};
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@ -60,6 +60,7 @@ libtalerexchange_la_SOURCES = \
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exchange_api_refresh_common.c exchange_api_refresh_common.h \
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exchange_api_refreshes_reveal.c \
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exchange_api_refund.c \
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exchange_api_reserves_close.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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385
src/lib/exchange_api_reserves_close.c
Normal file
385
src/lib/exchange_api_reserves_close.c
Normal file
@ -0,0 +1,385 @@
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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_close.c
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* @brief Implementation of the POST /reserves/$RESERVE_PUB/close requests
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* @author Christian Grothoff
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*/
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#include "platform.h"
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#include <jansson.h>
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#include <microhttpd.h> /* just for HTTP close codes */
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#include <gnunet/gnunet_util_lib.h>
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#include <gnunet/gnunet_json_lib.h>
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#include <gnunet/gnunet_curl_lib.h>
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#include "taler_exchange_service.h"
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#include "taler_json_lib.h"
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#include "exchange_api_handle.h"
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#include "taler_signatures.h"
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#include "exchange_api_curl_defaults.h"
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/**
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* @brief A /reserves/$RID/close Handle
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*/
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struct TALER_EXCHANGE_ReservesCloseHandle
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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_ReservesCloseCallback 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 close code. Handle the JSON
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* response.
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*
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* @param rch 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_close_ok (struct TALER_EXCHANGE_ReservesCloseHandle *rch,
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const json_t *j)
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{
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struct TALER_EXCHANGE_ReserveCloseResult 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 ("wire_amount",
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&rs.details.ok.wire_amount),
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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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rch->cb (rch->cb_cls,
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&rs);
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rch->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 close code. Handle the JSON
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* response.
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*
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* @param rch 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_close_kyc (struct TALER_EXCHANGE_ReservesCloseHandle *rch,
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const json_t *j)
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{
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struct TALER_EXCHANGE_ReserveCloseResult 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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rch->cb (rch->cb_cls,
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&rs);
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rch->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/close request.
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*
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* @param cls the `struct TALER_EXCHANGE_ReservesCloseHandle`
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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_close_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_ReservesCloseHandle *rch = cls;
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const json_t *j = response;
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struct TALER_EXCHANGE_ReserveCloseResult 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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rch->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_close_ok (rch,
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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_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_CONFLICT:
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/* Insufficient balance to inquire for reserve close */
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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_close_kyc (rch,
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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 close\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 != rch->cb)
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{
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rch->cb (rch->cb_cls,
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&rs);
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rch->cb = NULL;
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}
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TALER_EXCHANGE_reserves_close_cancel (rch);
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}
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struct TALER_EXCHANGE_ReservesCloseHandle *
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TALER_EXCHANGE_reserves_close (
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struct TALER_EXCHANGE_Handle *exchange,
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const struct TALER_ReservePrivateKeyP *reserve_priv,
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const char *target_payto_uri,
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TALER_EXCHANGE_ReservesCloseCallback cb,
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void *cb_cls)
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{
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struct TALER_EXCHANGE_ReservesCloseHandle *rch;
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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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struct TALER_PaytoHashP h_payto;
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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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rch = GNUNET_new (struct TALER_EXCHANGE_ReservesCloseHandle);
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rch->exchange = exchange;
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rch->cb = cb;
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rch->cb_cls = cb_cls;
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rch->ts = GNUNET_TIME_timestamp_get ();
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GNUNET_CRYPTO_eddsa_key_get_public (&reserve_priv->eddsa_priv,
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&rch->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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&rch->reserve_pub,
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sizeof (rch->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/close",
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pub_str);
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}
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rch->url = TEAH_path_to_url (exchange,
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arg_str);
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if (NULL == rch->url)
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{
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GNUNET_free (rch);
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return NULL;
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}
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eh = TALER_EXCHANGE_curl_easy_get_ (rch->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 (rch->url);
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GNUNET_free (rch);
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return NULL;
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}
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if (NULL != target_payto_uri)
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TALER_payto_hash (target_payto_uri,
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&h_payto);
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TALER_wallet_reserve_close_sign (rch->ts,
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(NULL != target_payto_uri)
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? &h_payto
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: NULL,
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reserve_priv,
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&rch->reserve_sig);
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{
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json_t *close_obj = GNUNET_JSON_PACK (
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GNUNET_JSON_pack_allow_null (
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GNUNET_JSON_pack_string ("payto_uri",
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target_payto_uri)),
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GNUNET_JSON_pack_timestamp ("request_timestamp",
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rch->ts),
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GNUNET_JSON_pack_data_auto ("reserve_sig",
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&rch->reserve_sig));
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if (GNUNET_OK !=
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TALER_curl_easy_post (&rch->post_ctx,
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eh,
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close_obj))
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{
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GNUNET_break (0);
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curl_easy_cleanup (eh);
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json_decref (close_obj);
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GNUNET_free (rch->url);
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GNUNET_free (rch);
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return NULL;
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}
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json_decref (close_obj);
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}
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ctx = TEAH_handle_to_context (exchange);
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rch->job = GNUNET_CURL_job_add2 (ctx,
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eh,
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rch->post_ctx.headers,
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&handle_reserves_close_finished,
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rch);
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return rch;
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}
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void
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TALER_EXCHANGE_reserves_close_cancel (
|
||||
struct TALER_EXCHANGE_ReservesCloseHandle *rch)
|
||||
{
|
||||
if (NULL != rch->job)
|
||||
{
|
||||
GNUNET_CURL_job_cancel (rch->job);
|
||||
rch->job = NULL;
|
||||
}
|
||||
TALER_curl_easy_post_finished (&rch->post_ctx);
|
||||
GNUNET_free (rch->url);
|
||||
GNUNET_free (rch);
|
||||
}
|
||||
|
||||
|
||||
/* end of exchange_api_reserves_close.c */
|
||||
@ -278,6 +278,13 @@ handle_reserves_open_finished (void *cls,
|
||||
rs.hr.ec = TALER_JSON_get_error_code (j);
|
||||
rs.hr.hint = TALER_JSON_get_error_hint (j);
|
||||
break;
|
||||
case MHD_HTTP_CONFLICT:
|
||||
// FIXME: not yet specified, but needed in
|
||||
// case of double-spending or insufficient
|
||||
// reserve balance!
|
||||
rs.hr.ec = TALER_JSON_get_error_code (j);
|
||||
rs.hr.hint = TALER_JSON_get_error_hint (j);
|
||||
break;
|
||||
case MHD_HTTP_UNAVAILABLE_FOR_LEGAL_REASONS:
|
||||
if (GNUNET_OK !=
|
||||
handle_reserves_open_kyc (roh,
|
||||
|
||||
Loading…
Reference in New Issue
Block a user