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/*
This file is part of TALER
Copyright (C) 2018 Taler Systems SA
TALER is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your
option) any later version.
TALER is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public
License along with TALER; see the file COPYING. If not, see
<http://www.gnu.org/licenses/>
*/
/**
* @file lib/testing_auditor_api_cmd_deposit_confirmation.c
* @brief command for testing /deposit_confirmation.
* @author Christian Grothoff
*/
#include "platform.h"
#include "taler_json_lib.h"
#include <gnunet/gnunet_curl_lib.h>
#include "taler_auditor_service.h"
#include "taler_testing_lib.h"
#include "taler_signatures.h"
#include "backoff.h"
/**
* State for a "deposit confirmation" CMD.
*/
struct DepositConfirmationState
{
/**
* Reference to any command that is able to provide a deposit.
*/
const char *deposit_reference;
/**
* What is the deposited amount without the fee (i.e. the
* amount we expect in the deposit confirmation)?
*/
const char *amount_without_fee;
/**
* Which coin of the @e deposit_reference should we confirm.
*/
unsigned int coin_index;
/**
* DepositConfirmation handle while operation is running.
*/
struct TALER_AUDITOR_DepositConfirmationHandle *dc;
/**
* Auditor connection.
*/
struct TALER_AUDITOR_Handle *auditor;
/**
* Interpreter state.
*/
struct TALER_TESTING_Interpreter *is;
/**
* Task scheduled to try later.
*/
struct GNUNET_SCHEDULER_Task *retry_task;
/**
* How long do we wait until we retry?
*/
struct GNUNET_TIME_Relative backoff;
/**
* Expected HTTP response code.
*/
unsigned int expected_response_code;
/**
* Should we retry on (transient) failures?
*/
int do_retry;
};
/**
* Run the command.
*
* @param cls closure.
* @param cmd the command to execute.
* @param is the interpreter state.
*/
static void
deposit_confirmation_run (void *cls,
const struct TALER_TESTING_Command *cmd,
struct TALER_TESTING_Interpreter *is);
/**
* Task scheduled to re-try #deposit_confirmation_run.
*
* @param cls a `struct DepositConfirmationState`
*/
static void
do_retry (void *cls)
{
struct DepositConfirmationState *dcs = cls;
dcs->retry_task = NULL;
deposit_confirmation_run (dcs,
NULL,
dcs->is);
}
/**
* Callback to analyze the /deposit-confirmation response, just used
* to check if the response code is acceptable.
*
* @param cls closure.
* @param http_status HTTP response code.
* @param ec taler-specific error code.
* @param obj raw response from the auditor.
*/
static void
deposit_confirmation_cb (void *cls,
unsigned int http_status,
enum TALER_ErrorCode ec,
const json_t *obj)
{
struct DepositConfirmationState *dcs = cls;
dcs->dc = NULL;
if (dcs->expected_response_code != http_status)
{
if (GNUNET_YES == dcs->do_retry)
{
if ( (0 == http_status) ||
(TALER_EC_DB_COMMIT_FAILED_ON_RETRY == ec) ||
(MHD_HTTP_INTERNAL_SERVER_ERROR == http_status) )
{
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
"Retrying deposit confirmation failed with %u/%d\n",
http_status,
(int) ec);
/* on DB conflicts, do not use backoff */
if (TALER_EC_DB_COMMIT_FAILED_ON_RETRY == ec)
dcs->backoff = GNUNET_TIME_UNIT_ZERO;
else
dcs->backoff = EXCHANGE_LIB_BACKOFF (dcs->backoff);
dcs->retry_task = GNUNET_SCHEDULER_add_delayed (dcs->backoff,
&do_retry,
dcs);
return;
}
}
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Unexpected response code %u to command %s in %s:%u\n",
http_status,
dcs->is->commands[dcs->is->ip].label,
__FILE__,
__LINE__);
json_dumpf (obj, stderr, 0);
TALER_TESTING_interpreter_fail (dcs->is);
return;
}
TALER_TESTING_interpreter_next (dcs->is);
}
/**
* Run the command.
*
* @param cls closure.
* @param cmd the command to execute.
* @param is the interpreter state.
*/
static void
deposit_confirmation_run (void *cls,
const struct TALER_TESTING_Command *cmd,
struct TALER_TESTING_Interpreter *is)
{
struct DepositConfirmationState *dcs = cls;
const struct TALER_TESTING_Command *deposit_cmd;
struct GNUNET_HashCode h_wire;
struct GNUNET_HashCode h_contract_terms;
struct GNUNET_TIME_Absolute timestamp;
struct GNUNET_TIME_Absolute refund_deadline;
struct TALER_Amount amount_without_fee;
struct TALER_CoinSpendPublicKeyP coin_pub;
const struct TALER_MerchantPrivateKeyP *merchant_priv;
struct TALER_MerchantPublicKeyP merchant_pub;
const struct TALER_ExchangePublicKeyP *exchange_pub;
const struct TALER_ExchangeSignatureP *exchange_sig;
const json_t *wire_details;
const json_t *contract_terms;
const struct TALER_CoinSpendPrivateKeyP *coin_priv;
const struct TALER_EXCHANGE_Keys *keys;
const struct TALER_EXCHANGE_SigningPublicKey *spk;
dcs->is = is;
GNUNET_assert (NULL != dcs->deposit_reference);
deposit_cmd
= TALER_TESTING_interpreter_lookup_command (is,
dcs->deposit_reference);
if (NULL == deposit_cmd)
{
GNUNET_break (0);
TALER_TESTING_interpreter_fail (is);
return;
}
GNUNET_assert (GNUNET_OK ==
TALER_TESTING_get_trait_exchange_pub (deposit_cmd,
dcs->coin_index,
&exchange_pub));
GNUNET_assert (GNUNET_OK ==
TALER_TESTING_get_trait_exchange_sig (deposit_cmd,
dcs->coin_index,
&exchange_sig));
keys = TALER_EXCHANGE_get_keys (dcs->is->exchange);
GNUNET_assert (NULL != keys);
spk = TALER_EXCHANGE_get_exchange_signing_key_info (keys,
exchange_pub);
GNUNET_assert (GNUNET_OK ==
TALER_TESTING_get_trait_contract_terms (deposit_cmd,
dcs->coin_index,
&contract_terms));
/* Very unlikely to fail */
GNUNET_assert (NULL != contract_terms);
GNUNET_assert (GNUNET_OK ==
TALER_JSON_hash (contract_terms,
&h_contract_terms));
GNUNET_assert (GNUNET_OK ==
TALER_TESTING_get_trait_wire_details (deposit_cmd,
dcs->coin_index,
&wire_details));
GNUNET_assert (GNUNET_OK ==
TALER_JSON_merchant_wire_signature_hash (wire_details,
&h_wire));
GNUNET_assert (GNUNET_OK ==
TALER_TESTING_get_trait_coin_priv (deposit_cmd,
dcs->coin_index,
&coin_priv));
GNUNET_CRYPTO_eddsa_key_get_public (&coin_priv->eddsa_priv,
&coin_pub.eddsa_pub);
GNUNET_assert (GNUNET_OK ==
TALER_TESTING_get_trait_merchant_priv (deposit_cmd,
dcs->coin_index,
&merchant_priv));
GNUNET_CRYPTO_eddsa_key_get_public (&merchant_priv->eddsa_priv,
&merchant_pub.eddsa_pub);
GNUNET_assert (GNUNET_OK ==
TALER_string_to_amount (dcs->amount_without_fee,
&amount_without_fee));
/* timestamp is mandatory */
{
struct GNUNET_JSON_Specification spec[] = {
GNUNET_JSON_spec_absolute_time ("timestamp", ×tamp),
GNUNET_JSON_spec_end ()
};
if (GNUNET_OK !=
GNUNET_JSON_parse (contract_terms,
spec,
NULL, NULL))
{
GNUNET_break (0);
TALER_TESTING_interpreter_fail (is);
return;
}
}
/* refund deadline is optional, defaults to zero */
{
struct GNUNET_JSON_Specification spec[] = {
GNUNET_JSON_spec_absolute_time ("refund_deadline", &refund_deadline),
GNUNET_JSON_spec_end ()
};
if (GNUNET_OK !=
GNUNET_JSON_parse (contract_terms,
spec,
NULL, NULL))
{
refund_deadline = timestamp;
}
}
dcs->dc = TALER_AUDITOR_deposit_confirmation
(dcs->auditor,
&h_wire,
&h_contract_terms,
timestamp,
refund_deadline,
&amount_without_fee,
&coin_pub,
&merchant_pub,
exchange_pub,
exchange_sig,
&keys->master_pub,
spk->valid_from,
spk->valid_until,
spk->valid_legal,
&spk->master_sig,
&deposit_confirmation_cb,
dcs);
if (NULL == dcs->dc)
{
GNUNET_break (0);
TALER_TESTING_interpreter_fail (is);
return;
}
return;
}
/**
* Free the state of a "deposit_confirmation" CMD, and possibly cancel a
* pending operation thereof.
*
* @param cls closure, a `struct DepositConfirmationState`
* @param cmd the command which is being cleaned up.
*/
static void
deposit_confirmation_cleanup (void *cls,
const struct TALER_TESTING_Command *cmd)
{
struct DepositConfirmationState *dcs = cls;
if (NULL != dcs->dc)
{
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
"Command %u (%s) did not complete\n",
dcs->is->ip,
cmd->label);
TALER_AUDITOR_deposit_confirmation_cancel (dcs->dc);
dcs->dc = NULL;
}
if (NULL != dcs->retry_task)
{
GNUNET_SCHEDULER_cancel (dcs->retry_task);
dcs->retry_task = NULL;
}
GNUNET_free (dcs);
}
/**
* Offer internal data to other commands.
*
* @param cls closure.
* @param ret[out] set to the wanted data.
* @param trait name of the trait.
* @param index index number of the traits to be returned.
*
* @return #GNUNET_OK on success
*/
static int
deposit_confirmation_traits (void *cls,
const void **ret,
const char *trait,
unsigned int index)
{
/* Must define this function because some callbacks
* look for certain traits on _all_ the commands. */
return GNUNET_SYSERR;
}
/**
* Create a "deposit-confirmation" command.
*
* @param label command label.
* @param auditor auditor connection.
* @param deposit_reference reference to any operation that can
* provide a coin.
* @param coin_index if @a deposit_reference offers an array of
* coins, this parameter selects which one in that array.
* This value is currently ignored, as only one-coin
* deposits are implemented.
* @param amount_without_fee deposited amount without the fee
* @param expected_response_code expected HTTP response code.
* @return the command.
*/
struct TALER_TESTING_Command
TALER_TESTING_cmd_deposit_confirmation
(const char *label,
struct TALER_AUDITOR_Handle *auditor,
const char *deposit_reference,
unsigned int coin_index,
const char *amount_without_fee,
unsigned int expected_response_code)
{
struct TALER_TESTING_Command cmd = {0}; /* need explicit zeroing..*/
struct DepositConfirmationState *dcs;
dcs = GNUNET_new (struct DepositConfirmationState);
dcs->auditor = auditor;
dcs->deposit_reference = deposit_reference;
dcs->coin_index = coin_index;
dcs->amount_without_fee = amount_without_fee;
dcs->expected_response_code = expected_response_code;
cmd.cls = dcs;
cmd.label = label;
cmd.run = &deposit_confirmation_run;
cmd.cleanup = &deposit_confirmation_cleanup;
cmd.traits = &deposit_confirmation_traits;
return cmd;
}
/**
* Modify a deposit confirmation command to enable retries when we get
* transient errors from the auditor.
*
* @param cmd a deposit confirmation command
* @return the command with retries enabled
*/
struct TALER_TESTING_Command
TALER_TESTING_cmd_deposit_confirmation_with_retry (struct TALER_TESTING_Command
cmd)
{
struct DepositConfirmationState *dcs;
GNUNET_assert (&deposit_confirmation_run == cmd.run);
dcs = cmd.cls;
dcs->do_retry = GNUNET_YES;
return cmd;
}
/* end of testing_auditor_api_cmd_deposit_confirmation.c */
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