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|
/*
This file is part of TALER
Copyright (C) 2018-2021 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 testing/testing_api_cmd_deposit.c
* @brief command for testing /deposit.
* @author Marcello Stanisci
*/
#include "platform.h"
#include "taler_json_lib.h"
#include <gnunet/gnunet_curl_lib.h>
#include "taler_testing_lib.h"
#include "taler_signatures.h"
#include "backoff.h"
/**
* How often do we retry before giving up?
*/
#define NUM_RETRIES 5
/**
* How long do we wait AT MOST when retrying?
*/
#define MAX_BACKOFF GNUNET_TIME_relative_multiply ( \
GNUNET_TIME_UNIT_MILLISECONDS, 100)
/**
* State for a "deposit" CMD.
*/
struct DepositState
{
/**
* Amount to deposit.
*/
struct TALER_Amount amount;
/**
* Deposit fee.
*/
struct TALER_Amount deposit_fee;
/**
* Reference to any command that is able to provide a coin.
*/
const char *coin_reference;
/**
* If @e coin_reference refers to an operation that generated
* an array of coins, this value determines which coin to pick.
*/
unsigned int coin_index;
/**
* Wire details of who is depositing -- this would be merchant
* wire details in a normal scenario.
*/
json_t *wire_details;
/**
* JSON string describing what a proposal is about.
*/
json_t *contract_terms;
/**
* Refund deadline. Zero for no refunds.
*/
struct GNUNET_TIME_Timestamp refund_deadline;
/**
* Wire deadline.
*/
struct GNUNET_TIME_Timestamp wire_deadline;
/**
* Set (by the interpreter) to a fresh private key. This
* key will be used to sign the deposit request.
*/
struct TALER_MerchantPrivateKeyP merchant_priv;
/**
* Deposit handle while operation is running.
*/
struct TALER_EXCHANGE_DepositHandle *dh;
/**
* Timestamp of the /deposit operation in the wallet (contract signing time).
*/
struct GNUNET_TIME_Timestamp wallet_timestamp;
/**
* 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;
/**
* How often should we retry on (transient) failures?
*/
unsigned int do_retry;
/**
* Set to #GNUNET_YES if the /deposit succeeded
* and we now can provide the resulting traits.
*/
int deposit_succeeded;
/**
* When did the exchange receive the deposit?
*/
struct GNUNET_TIME_Timestamp exchange_timestamp;
/**
* Signing key used by the exchange to sign the
* deposit confirmation.
*/
struct TALER_ExchangePublicKeyP exchange_pub;
/**
* Signature from the exchange on the
* deposit confirmation.
*/
struct TALER_ExchangeSignatureP exchange_sig;
/**
* Reference to previous deposit operation.
* Only present if we're supposed to replay the previous deposit.
*/
const char *deposit_reference;
/**
* Did we set the parameters for this deposit command?
*
* When we're referencing another deposit operation,
* this will only be set after the command has been started.
*/
int command_initialized;
/**
* Reference to fetch the merchant private key from.
* If NULL, we generate our own, fresh merchant key.
*/
const char *merchant_priv_reference;
};
/**
* Run the command.
*
* @param cls closure.
* @param cmd the command to execute.
* @param is the interpreter state.
*/
static void
deposit_run (void *cls,
const struct TALER_TESTING_Command *cmd,
struct TALER_TESTING_Interpreter *is);
/**
* Task scheduled to re-try #deposit_run.
*
* @param cls a `struct DepositState`
*/
static void
do_retry (void *cls)
{
struct DepositState *ds = cls;
ds->retry_task = NULL;
ds->is->commands[ds->is->ip].last_req_time
= GNUNET_TIME_absolute_get ();
deposit_run (ds,
NULL,
ds->is);
}
/**
* Callback to analyze the /deposit response, just used to
* check if the response code is acceptable.
*
* @param cls closure.
* @param dr deposit response details
*/
static void
deposit_cb (void *cls,
const struct TALER_EXCHANGE_DepositResult *dr)
{
struct DepositState *ds = cls;
ds->dh = NULL;
if (ds->expected_response_code != dr->hr.http_status)
{
if (0 != ds->do_retry)
{
ds->do_retry--;
if ( (0 == dr->hr.http_status) ||
(TALER_EC_GENERIC_DB_SOFT_FAILURE == dr->hr.ec) ||
(MHD_HTTP_INTERNAL_SERVER_ERROR == dr->hr.http_status) )
{
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
"Retrying deposit failed with %u/%d\n",
dr->hr.http_status,
(int) dr->hr.ec);
/* on DB conflicts, do not use backoff */
if (TALER_EC_GENERIC_DB_SOFT_FAILURE == dr->hr.ec)
ds->backoff = GNUNET_TIME_UNIT_ZERO;
else
ds->backoff = GNUNET_TIME_randomized_backoff (ds->backoff,
MAX_BACKOFF);
ds->is->commands[ds->is->ip].num_tries++;
ds->retry_task
= GNUNET_SCHEDULER_add_delayed (ds->backoff,
&do_retry,
ds);
return;
}
}
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Unexpected response code %u to command %s in %s:%u\n",
dr->hr.http_status,
ds->is->commands[ds->is->ip].label,
__FILE__,
__LINE__);
json_dumpf (dr->hr.reply,
stderr,
0);
TALER_TESTING_interpreter_fail (ds->is);
return;
}
if (MHD_HTTP_OK == dr->hr.http_status)
{
ds->deposit_succeeded = GNUNET_YES;
ds->exchange_timestamp = dr->details.success.deposit_timestamp;
ds->exchange_pub = *dr->details.success.exchange_pub;
ds->exchange_sig = *dr->details.success.exchange_sig;
}
TALER_TESTING_interpreter_next (ds->is);
}
/**
* Run the command.
*
* @param cls closure.
* @param cmd the command to execute.
* @param is the interpreter state.
*/
static void
deposit_run (void *cls,
const struct TALER_TESTING_Command *cmd,
struct TALER_TESTING_Interpreter *is)
{
struct DepositState *ds = cls;
const struct TALER_TESTING_Command *coin_cmd;
const struct TALER_CoinSpendPrivateKeyP *coin_priv;
struct TALER_CoinSpendPublicKeyP coin_pub;
struct TALER_AgeCommitment *age_commitment = NULL;
struct TALER_AgeCommitmentHash h_age_commitment = {0};
const struct TALER_EXCHANGE_DenomPublicKey *denom_pub;
const struct TALER_DenominationSignature *denom_pub_sig;
struct TALER_CoinSpendSignatureP coin_sig;
struct TALER_MerchantPublicKeyP merchant_pub;
struct TALER_PrivateContractHashP h_contract_terms;
enum TALER_ErrorCode ec;
struct TALER_WireSaltP wire_salt;
const char *payto_uri;
struct GNUNET_JSON_Specification spec[] = {
GNUNET_JSON_spec_string ("payto_uri",
&payto_uri),
GNUNET_JSON_spec_fixed_auto ("salt",
&wire_salt),
GNUNET_JSON_spec_end ()
};
(void) cmd;
ds->is = is;
if (NULL != ds->deposit_reference)
{
/* We're copying another deposit operation, initialize here. */
const struct TALER_TESTING_Command *cmd;
struct DepositState *ods;
cmd = TALER_TESTING_interpreter_lookup_command (is,
ds->deposit_reference);
if (NULL == cmd)
{
GNUNET_break (0);
TALER_TESTING_interpreter_fail (is);
return;
}
ods = cmd->cls;
ds->coin_reference = ods->coin_reference;
ds->coin_index = ods->coin_index;
ds->wire_details = json_incref (ods->wire_details);
GNUNET_assert (NULL != ds->wire_details);
ds->contract_terms = json_incref (ods->contract_terms);
ds->wallet_timestamp = ods->wallet_timestamp;
ds->refund_deadline = ods->refund_deadline;
ds->amount = ods->amount;
ds->merchant_priv = ods->merchant_priv;
ds->command_initialized = GNUNET_YES;
}
else if (NULL != ds->merchant_priv_reference)
{
/* We're copying the merchant key from another deposit operation */
const struct TALER_MerchantPrivateKeyP *merchant_priv;
const struct TALER_TESTING_Command *cmd;
cmd = TALER_TESTING_interpreter_lookup_command (is,
ds->merchant_priv_reference);
if (NULL == cmd)
{
GNUNET_break (0);
TALER_TESTING_interpreter_fail (is);
return;
}
if ( (GNUNET_OK !=
TALER_TESTING_get_trait_merchant_priv (cmd,
&merchant_priv)) )
{
GNUNET_break (0);
TALER_TESTING_interpreter_fail (is);
return;
}
ds->merchant_priv = *merchant_priv;
}
GNUNET_assert (NULL != ds->wire_details);
if (GNUNET_OK !=
GNUNET_JSON_parse (ds->wire_details,
spec,
NULL, NULL))
{
json_dumpf (ds->wire_details,
stderr,
JSON_INDENT (2));
GNUNET_break (0);
TALER_TESTING_interpreter_fail (is);
return;
}
GNUNET_assert (ds->coin_reference);
coin_cmd = TALER_TESTING_interpreter_lookup_command (is,
ds->coin_reference);
if (NULL == coin_cmd)
{
GNUNET_break (0);
TALER_TESTING_interpreter_fail (is);
return;
}
if ( (GNUNET_OK !=
TALER_TESTING_get_trait_coin_priv (coin_cmd,
ds->coin_index,
&coin_priv)) ||
(GNUNET_OK !=
TALER_TESTING_get_trait_age_commitment (coin_cmd,
ds->coin_index,
&age_commitment)) ||
(GNUNET_OK !=
TALER_TESTING_get_trait_denom_pub (coin_cmd,
ds->coin_index,
&denom_pub)) ||
(GNUNET_OK !=
TALER_TESTING_get_trait_denom_sig (coin_cmd,
ds->coin_index,
&denom_pub_sig)) ||
(GNUNET_OK !=
TALER_JSON_contract_hash (ds->contract_terms,
&h_contract_terms)) )
{
GNUNET_break (0);
TALER_TESTING_interpreter_fail (is);
return;
}
if (NULL != age_commitment)
{
TALER_age_commitment_hash (age_commitment, &h_age_commitment);
}
ds->deposit_fee = denom_pub->fees.deposit;
GNUNET_CRYPTO_eddsa_key_get_public (&coin_priv->eddsa_priv,
&coin_pub.eddsa_pub);
if (! GNUNET_TIME_absolute_is_zero (ds->refund_deadline.abs_time))
{
struct GNUNET_TIME_Relative refund_deadline;
refund_deadline
= GNUNET_TIME_absolute_get_remaining (ds->refund_deadline.abs_time);
ds->wire_deadline
=
GNUNET_TIME_relative_to_timestamp (
GNUNET_TIME_relative_multiply (refund_deadline,
2));
}
else
{
ds->refund_deadline = ds->wallet_timestamp;
ds->wire_deadline = GNUNET_TIME_timestamp_get ();
}
GNUNET_CRYPTO_eddsa_key_get_public (&ds->merchant_priv.eddsa_priv,
&merchant_pub.eddsa_pub);
{
struct TALER_MerchantWireHashP h_wire;
GNUNET_assert (GNUNET_OK ==
TALER_JSON_merchant_wire_signature_hash (ds->wire_details,
&h_wire));
TALER_wallet_deposit_sign (&ds->amount,
&denom_pub->fees.deposit,
&h_wire,
&h_contract_terms,
&h_age_commitment,
NULL, /* FIXME: add hash of extensions */
&denom_pub->h_key,
ds->wallet_timestamp,
&merchant_pub,
ds->refund_deadline,
coin_priv,
&coin_sig);
}
ds->dh = TALER_EXCHANGE_deposit (is->exchange,
&ds->amount,
ds->wire_deadline,
payto_uri,
&wire_salt,
&h_contract_terms,
&h_age_commitment,
NULL, /* FIXME: add hash of extensions */
&coin_pub,
denom_pub_sig,
&denom_pub->key,
ds->wallet_timestamp,
&merchant_pub,
ds->refund_deadline,
&coin_sig,
&deposit_cb,
ds,
&ec);
if (NULL == ds->dh)
{
GNUNET_break (0);
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Could not create deposit with EC %d\n",
(int) ec);
TALER_TESTING_interpreter_fail (is);
return;
}
}
/**
* Free the state of a "deposit" CMD, and possibly cancel a
* pending operation thereof.
*
* @param cls closure, must be a `struct DepositState`.
* @param cmd the command which is being cleaned up.
*/
static void
deposit_cleanup (void *cls,
const struct TALER_TESTING_Command *cmd)
{
struct DepositState *ds = cls;
if (NULL != ds->dh)
{
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
"Command %u (%s) did not complete\n",
ds->is->ip,
cmd->label);
TALER_EXCHANGE_deposit_cancel (ds->dh);
ds->dh = NULL;
}
if (NULL != ds->retry_task)
{
GNUNET_SCHEDULER_cancel (ds->retry_task);
ds->retry_task = NULL;
}
json_decref (ds->wire_details);
json_decref (ds->contract_terms);
GNUNET_free (ds);
}
/**
* Offer internal data from a "deposit" CMD, to other commands.
*
* @param cls closure.
* @param[out] ret result.
* @param trait name of the trait.
* @param index index number of the object to offer.
* @return #GNUNET_OK on success.
*/
static enum GNUNET_GenericReturnValue
deposit_traits (void *cls,
const void **ret,
const char *trait,
unsigned int index)
{
struct DepositState *ds = cls;
const struct TALER_TESTING_Command *coin_cmd;
/* Will point to coin cmd internals. */
const struct TALER_CoinSpendPrivateKeyP *coin_spent_priv;
struct TALER_AgeCommitment *age_commitment;
if (GNUNET_YES != ds->command_initialized)
{
/* No access to traits yet. */
GNUNET_break (0);
return GNUNET_NO;
}
coin_cmd
= TALER_TESTING_interpreter_lookup_command (ds->is,
ds->coin_reference);
if (NULL == coin_cmd)
{
GNUNET_break (0);
TALER_TESTING_interpreter_fail (ds->is);
return GNUNET_NO;
}
if (GNUNET_OK !=
TALER_TESTING_get_trait_coin_priv (coin_cmd,
ds->coin_index,
&coin_spent_priv) ||
(GNUNET_OK !=
TALER_TESTING_get_trait_age_commitment (coin_cmd,
ds->coin_index,
&age_commitment)))
{
GNUNET_break (0);
TALER_TESTING_interpreter_fail (ds->is);
return GNUNET_NO;
}
{
struct TALER_TESTING_Trait traits[] = {
/* First two traits are only available if
ds->traits is #GNUNET_YES */
TALER_TESTING_make_trait_exchange_pub (0, &ds->exchange_pub),
TALER_TESTING_make_trait_exchange_sig (0, &ds->exchange_sig),
/* These traits are always available */
TALER_TESTING_make_trait_coin_priv (0,
coin_spent_priv),
TALER_TESTING_make_trait_age_commitment (0,
age_commitment),
TALER_TESTING_make_trait_wire_details (ds->wire_details),
TALER_TESTING_make_trait_contract_terms (ds->contract_terms),
TALER_TESTING_make_trait_merchant_priv (&ds->merchant_priv),
TALER_TESTING_make_trait_deposit_amount (&ds->amount),
TALER_TESTING_make_trait_deposit_fee_amount (&ds->deposit_fee),
TALER_TESTING_make_trait_timestamp (0,
&ds->exchange_timestamp),
TALER_TESTING_make_trait_wire_deadline (0,
&ds->wire_deadline),
TALER_TESTING_make_trait_refund_deadline (0,
&ds->refund_deadline),
TALER_TESTING_trait_end ()
};
return TALER_TESTING_get_trait ((ds->deposit_succeeded)
? traits
: &traits[2],
ret,
trait,
index);
}
}
struct TALER_TESTING_Command
TALER_TESTING_cmd_deposit (const char *label,
const char *coin_reference,
unsigned int coin_index,
const char *target_account_payto,
const char *contract_terms,
struct GNUNET_TIME_Relative refund_deadline,
const char *amount,
unsigned int expected_response_code)
{
struct DepositState *ds;
ds = GNUNET_new (struct DepositState);
ds->coin_reference = coin_reference;
ds->coin_index = coin_index;
ds->wire_details = TALER_TESTING_make_wire_details (target_account_payto);
GNUNET_assert (NULL != ds->wire_details);
ds->contract_terms = json_loads (contract_terms,
JSON_REJECT_DUPLICATES,
NULL);
GNUNET_CRYPTO_eddsa_key_create (&ds->merchant_priv.eddsa_priv);
if (NULL == ds->contract_terms)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Failed to parse contract terms `%s' for CMD `%s'\n",
contract_terms,
label);
GNUNET_assert (0);
}
ds->wallet_timestamp = GNUNET_TIME_timestamp_get ();
GNUNET_assert (0 ==
json_object_set_new (ds->contract_terms,
"timestamp",
GNUNET_JSON_from_timestamp (
ds->wallet_timestamp)));
if (! GNUNET_TIME_relative_is_zero (refund_deadline))
{
ds->refund_deadline = GNUNET_TIME_relative_to_timestamp (refund_deadline);
GNUNET_assert (0 ==
json_object_set_new (ds->contract_terms,
"refund_deadline",
GNUNET_JSON_from_timestamp (
ds->refund_deadline)));
}
GNUNET_assert (GNUNET_OK ==
TALER_string_to_amount (amount,
&ds->amount));
ds->expected_response_code = expected_response_code;
ds->command_initialized = GNUNET_YES;
{
struct TALER_TESTING_Command cmd = {
.cls = ds,
.label = label,
.run = &deposit_run,
.cleanup = &deposit_cleanup,
.traits = &deposit_traits
};
return cmd;
}
}
struct TALER_TESTING_Command
TALER_TESTING_cmd_deposit_with_ref (const char *label,
const char *coin_reference,
unsigned int coin_index,
const char *target_account_payto,
const char *contract_terms,
struct GNUNET_TIME_Relative refund_deadline,
const char *amount,
unsigned int expected_response_code,
const char *merchant_priv_reference)
{
struct DepositState *ds;
ds = GNUNET_new (struct DepositState);
ds->merchant_priv_reference = merchant_priv_reference;
ds->coin_reference = coin_reference;
ds->coin_index = coin_index;
ds->wire_details = TALER_TESTING_make_wire_details (target_account_payto);
GNUNET_assert (NULL != ds->wire_details);
ds->contract_terms = json_loads (contract_terms,
JSON_REJECT_DUPLICATES,
NULL);
if (NULL == ds->contract_terms)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Failed to parse contract terms `%s' for CMD `%s'\n",
contract_terms,
label);
GNUNET_assert (0);
}
ds->wallet_timestamp = GNUNET_TIME_timestamp_get ();
json_object_set_new (ds->contract_terms,
"timestamp",
GNUNET_JSON_from_timestamp (ds->wallet_timestamp));
if (0 != refund_deadline.rel_value_us)
{
ds->refund_deadline = GNUNET_TIME_relative_to_timestamp (refund_deadline);
json_object_set_new (ds->contract_terms,
"refund_deadline",
GNUNET_JSON_from_timestamp (ds->refund_deadline));
}
GNUNET_assert (GNUNET_OK ==
TALER_string_to_amount (amount,
&ds->amount));
ds->expected_response_code = expected_response_code;
ds->command_initialized = GNUNET_YES;
{
struct TALER_TESTING_Command cmd = {
.cls = ds,
.label = label,
.run = &deposit_run,
.cleanup = &deposit_cleanup,
.traits = &deposit_traits
};
return cmd;
}
}
struct TALER_TESTING_Command
TALER_TESTING_cmd_deposit_replay (const char *label,
const char *deposit_reference,
unsigned int expected_response_code)
{
struct DepositState *ds;
ds = GNUNET_new (struct DepositState);
ds->deposit_reference = deposit_reference;
ds->expected_response_code = expected_response_code;
{
struct TALER_TESTING_Command cmd = {
.cls = ds,
.label = label,
.run = &deposit_run,
.cleanup = &deposit_cleanup,
.traits = &deposit_traits
};
return cmd;
}
}
struct TALER_TESTING_Command
TALER_TESTING_cmd_deposit_with_retry (struct TALER_TESTING_Command cmd)
{
struct DepositState *ds;
GNUNET_assert (&deposit_run == cmd.run);
ds = cmd.cls;
ds->do_retry = NUM_RETRIES;
return cmd;
}
/* end of testing_api_cmd_deposit.c */
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