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deal with aggregation fee lookup and calculations in auditor

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Christian Grothoff 2017-03-20 03:58:51 +01:00
parent 4599b25895
commit 9fe8da0cc6
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GPG Key ID: 939E6BE1E29FC3CC
1 changed files with 160 additions and 4 deletions
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162
src/auditor/taler-auditor.c
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@ -267,6 +267,26 @@ report_reserve_balance (const struct TALER_Amount *total_balance,
}
/**
* Report on the aggregation fees the exchange made.
*
* Note that this is for the "ongoing" reporting period. Historic
* revenue (as stored via the "insert_historic_reserve_revenue")
* is not included in the @a total_fee_balance.
*
* @param total_fee_balance how much money (in total) did the reserve
* make from aggregation fees
*/
static void
report_aggregation_fee_balance (const struct TALER_Amount *total_fee_balance)
{
// TODO: implement proper reporting logic writing to file.
GNUNET_log (GNUNET_ERROR_TYPE_MESSAGE,
_("Total aggregation fees are at %s\n"),
TALER_amount2s (total_fee_balance));
}
/**
* Report state of denomination processing.
*
@ -1092,6 +1112,40 @@ struct WirePlugin
};
/**
* Information about wire fees charged by the exchange.
*/
struct WireFeeInfo
{
/**
* Kept in a DLL.
*/
struct WireFeeInfo *next;
/**
* Kept in a DLL.
*/
struct WireFeeInfo *prev;
/**
* When does the fee go into effect (inclusive).
*/
struct GNUNET_TIME_Absolute start_date;
/**
* When does the fee stop being in effect (exclusive).
*/
struct GNUNET_TIME_Absolute end_date;
/**
* How high is the fee.
*/
struct TALER_Amount wire_fee;
};
/**
* Closure for callbacks during #analyze_merchants().
*/
@ -1108,6 +1162,16 @@ struct AggregationContext
*/
struct WirePlugin *wire_tail;
/**
* DLL of wire fees charged by the exchange.
*/
struct WireFeeInfo *fee_head;
/**
* DLL of wire fees charged by the exchange.
*/
struct WireFeeInfo *fee_tail;
/**
* How much did we make in aggregation fees.
*/
@ -1607,15 +1671,96 @@ wire_transfer_information_cb (void *cls,
* Lookup the wire fee that the exchange charges at @a timestamp.
*
* @param ac context for caching the result
* @param type type of the wire plugin
* @param timestamp time for which we need the fee
* @return NULL on error (fee unknown)
*/
static const struct TALER_Amount *
get_wire_fee (struct AggregationContext *ac,
const char *type,
struct GNUNET_TIME_Absolute timestamp)
{
GNUNET_break (0); /* not implemented! */
struct WireFeeInfo *wfi;
struct WireFeeInfo *pos;
struct TALER_MasterSignatureP master_sig;
/* Check if fee is already loaded in cache */
for (pos = ac->fee_head; NULL != pos; pos = pos->next)
{
if ( (pos->start_date.abs_value_us <= timestamp.abs_value_us) &&
(pos->end_date.abs_value_us > timestamp.abs_value_us) )
return &pos->wire_fee;
if (pos->start_date.abs_value_us > timestamp.abs_value_us)
break;
}
/* Lookup fee in exchange database */
wfi = GNUNET_new (struct WireFeeInfo);
if (GNUNET_OK !=
edb->get_wire_fee (edb->cls,
esession,
type,
timestamp,
&wfi->start_date,
&wfi->end_date,
&wfi->wire_fee,
&master_sig))
{
GNUNET_break (0);
GNUNET_free (wfi);
return NULL;
}
/* Check signature (not terribly meaningful as the exchange can
easily make this one up, but it means that we have proof that
the master key was used for inconsistent wire fees if a
merchant complains. */
{
struct TALER_MasterWireFeePS wp;
wp.purpose.purpose = htonl (TALER_SIGNATURE_MASTER_WIRE_FEES);
wp.purpose.size = htonl (sizeof (wp));
GNUNET_CRYPTO_hash (type,
strlen (type) + 1,
&wp.h_wire_method);
wp.start_date = GNUNET_TIME_absolute_hton (wfi->start_date);
wp.end_date = GNUNET_TIME_absolute_hton (wfi->end_date);
TALER_amount_hton (&wp.wire_fee,
&wfi->wire_fee);
if (GNUNET_OK !=
GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_MASTER_WIRE_FEES,
&wp.purpose,
&master_sig.eddsa_signature,
&master_pub.eddsa_pub))
{
GNUNET_break (0);
GNUNET_free (wfi);
return NULL;
}
}
/* Established fee, keep in sorted list */
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Wire fee is %s starting at %s\n",
TALER_amount2s (&wfi->wire_fee),
GNUNET_STRINGS_absolute_time_to_string (wfi->start_date));
if ( (NULL == pos) ||
(NULL == pos->prev) )
GNUNET_CONTAINER_DLL_insert (ac->fee_head,
ac->fee_tail,
wfi);
else
GNUNET_CONTAINER_DLL_insert_after (ac->fee_head,
ac->fee_tail,
pos->prev,
wfi);
/* Check non-overlaping fee invariant */
/* TODO: maybe report problems more nicely? */
if (NULL != wfi->prev)
GNUNET_break (wfi->prev->end_date.abs_value_us <= wfi->start_date.abs_value_us);
if (NULL != wfi->next)
GNUNET_break (wfi->next->start_date.abs_value_us >= wfi->end_date.abs_value_us);
return &wfi->wire_fee;
}
@ -1688,6 +1833,7 @@ check_wire_out_cb (void *cls,
/* Subtract aggregation fee from total */
wire_fee = get_wire_fee (ac,
wcc.method,
date);
if (NULL == wire_fee)
{
@ -1750,7 +1896,7 @@ check_wire_out_cb (void *cls,
/* Check that calculated amount matches actual amount */
if (0 != TALER_amount_cmp (amount,
&wcc.total_deposits))
&final_amount))
{
report_wire_out_inconsistency (wire,
rowid,
@ -1776,12 +1922,15 @@ analyze_aggregations (void *cls)
{
struct AggregationContext ac;
struct WirePlugin *wc;
struct WireFeeInfo *wfi;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Analyzing aggregations\n");
ac.ret = GNUNET_OK;
ac.wire_head = NULL;
ac.wire_tail = NULL;
ac.fee_head = NULL;
ac.fee_tail = NULL;
/* FIXME: load existing value from DB! */
GNUNET_assert (GNUNET_OK ==
TALER_amount_get_zero (currency,
@ -1805,13 +1954,20 @@ analyze_aggregations (void *cls)
GNUNET_free (wc->type);
GNUNET_free (wc);
}
while (NULL != (wfi = ac.fee_head))
{
GNUNET_CONTAINER_DLL_remove (ac.fee_head,
ac.fee_tail,
wfi);
GNUNET_free (wfi);
}
if (GNUNET_OK != ac.ret)
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
/* FIXME: store aggregation fee total to DB! */
/* FIXME: report aggregation fee total */
report_aggregation_fee_balance (&ac.total_aggregation_fees);
return ac.ret;
}