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-rw-r--r--src/auditor/taler-helper-auditor-aggregation.c170
1 files changed, 96 insertions, 74 deletions
diff --git a/src/auditor/taler-helper-auditor-aggregation.c b/src/auditor/taler-helper-auditor-aggregation.c
index 5b07a1fd..cf2afd7b 100644
--- a/src/auditor/taler-helper-auditor-aggregation.c
+++ b/src/auditor/taler-helper-auditor-aggregation.c
@@ -370,14 +370,14 @@ struct WireCheckContext
* the amounts for the aggregation table and checks that the total
* claimed coin value is within the value of the coin's denomination.
*
- * @param coin_pub public key of the coin (for TALER_ARL_reporting)
+ * @param coin_pub public key of the coin (for reporting)
* @param h_contract_terms hash of the proposal for which we calculate the amount
* @param merchant_pub public key of the merchant (who is allowed to issue refunds)
* @param issue denomination information about the coin
* @param tl_head head of transaction history to verify
* @param[out] merchant_gain amount the coin contributes to the wire transfer to the merchant
* @param[out] deposit_gain amount the coin contributes excluding refunds
- * @return #GNUNET_OK on success, #GNUNET_SYSERR on error
+ * @return #GNUNET_OK on success, #GNUNET_SYSERR if the transaction must fail (hard error)
*/
static int
check_transaction_history_for_deposit (
@@ -392,17 +392,13 @@ check_transaction_history_for_deposit (
struct TALER_Amount expenditures;
struct TALER_Amount refunds;
struct TALER_Amount spent;
- struct TALER_Amount value;
struct TALER_Amount merchant_loss;
- struct TALER_Amount final_gain;
const struct TALER_Amount *deposit_fee;
int refund_deposit_fee;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Checking transaction history of coin %s\n",
TALER_B2S (coin_pub));
-
- GNUNET_assert (NULL != tl_head);
GNUNET_assert (GNUNET_OK ==
TALER_amount_get_zero (TALER_ARL_currency,
&expenditures));
@@ -415,10 +411,11 @@ check_transaction_history_for_deposit (
GNUNET_assert (GNUNET_OK ==
TALER_amount_get_zero (TALER_ARL_currency,
&merchant_loss));
- /* Go over transaction history to compute totals; note that we do not
- know the order, so instead of subtracting we compute positive
- (deposit, melt) and negative (refund) values separately here,
- and then subtract the negative from the positive after the loop. */
+ /* Go over transaction history to compute totals; note that we do not bother
+ to reconstruct the order of the events, so instead of subtracting we
+ compute positive (deposit, melt) and negative (refund) values separately
+ here, and then subtract the negative from the positive at the end (after
+ the loops). *///
refund_deposit_fee = GNUNET_NO;
deposit_fee = NULL;
for (const struct TALER_EXCHANGEDB_TransactionList *tl = tl_head;
@@ -426,9 +423,7 @@ check_transaction_history_for_deposit (
tl = tl->next)
{
const struct TALER_Amount *amount_with_fee;
- const struct TALER_Amount *fee;
- const struct TALER_AmountNBO *fee_dki;
- struct TALER_Amount tmp;
+ const struct TALER_Amount *fee_claimed;
switch (tl->type)
{
@@ -444,7 +439,7 @@ check_transaction_history_for_deposit (
{
report_row_inconsistency ("deposits",
tl->serial_id,
- "wire value malformed");
+ "wire account given is malformed");
}
else if (0 !=
GNUNET_memcmp (&hw,
@@ -455,9 +450,8 @@ check_transaction_history_for_deposit (
"h(wire) does not match wire");
}
}
- amount_with_fee = &tl->details.deposit->amount_with_fee;
- fee = &tl->details.deposit->deposit_fee;
- fee_dki = &issue->fee_deposit;
+ amount_with_fee = &tl->details.deposit->amount_with_fee; /* according to exchange*/
+ fee_claimed = &tl->details.deposit->deposit_fee; /* Fee according to exchange DB */
if (GNUNET_OK !=
TALER_amount_add (&expenditures,
&expenditures,
@@ -478,7 +472,7 @@ check_transaction_history_for_deposit (
if (GNUNET_OK !=
TALER_amount_subtract (&amount_without_fee,
amount_with_fee,
- fee))
+ fee_claimed))
{
GNUNET_break (0);
return GNUNET_SYSERR;
@@ -494,24 +488,30 @@ check_transaction_history_for_deposit (
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Detected applicable deposit of %s\n",
TALER_amount2s (&amount_without_fee));
- deposit_fee = fee;
+ deposit_fee = fee_claimed; /* We had a deposit, remember the fee, we may need it */
}
/* Check that the fees given in the transaction list and in dki match */
- TALER_amount_ntoh (&tmp,
- fee_dki);
- if (0 !=
- TALER_amount_cmp (&tmp,
- fee))
{
- /* Disagreement in fee structure within DB, should be impossible! */
- GNUNET_break (0);
- return GNUNET_SYSERR;
+ struct TALER_Amount fee_expected;
+
+ TALER_amount_ntoh (&fee_expected,
+ &issue->fee_deposit);
+ if (0 !=
+ TALER_amount_cmp (&fee_expected,
+ fee_claimed))
+ {
+ /* Disagreement in fee structure between auditor and exchange DB! */
+ report_amount_arithmetic_inconsistency ("deposit fee",
+ UINT64_MAX,
+ fee_claimed,
+ &fee_expected,
+ 1);
+ }
}
break;
case TALER_EXCHANGEDB_TT_MELT:
amount_with_fee = &tl->details.melt->amount_with_fee;
- fee = &tl->details.melt->melt_fee;
- fee_dki = &issue->fee_refresh;
+ fee_claimed = &tl->details.melt->melt_fee;
if (GNUNET_OK !=
TALER_amount_add (&expenditures,
&expenditures,
@@ -520,22 +520,28 @@ check_transaction_history_for_deposit (
GNUNET_break (0);
return GNUNET_SYSERR;
}
- /* Check that the fees given in the transaction list and in dki match */
- TALER_amount_ntoh (&tmp,
- fee_dki);
- if (0 !=
- TALER_amount_cmp (&tmp,
- fee))
{
- /* Disagreement in fee structure within DB, should be impossible! */
- GNUNET_break (0);
- return GNUNET_SYSERR;
+ struct TALER_Amount fee_expected;
+
+ /* Check that the fees given in the transaction list and in dki match */
+ TALER_amount_ntoh (&fee_expected,
+ &issue->fee_refresh);
+ if (0 !=
+ TALER_amount_cmp (&fee_expected,
+ fee_claimed))
+ {
+ /* Disagreement in fee structure between exchange and auditor */
+ report_amount_arithmetic_inconsistency ("melt fee",
+ UINT64_MAX,
+ fee_claimed,
+ &fee_expected,
+ 1);
+ }
}
break;
case TALER_EXCHANGEDB_TT_REFUND:
amount_with_fee = &tl->details.refund->refund_amount;
- fee = &tl->details.refund->refund_fee;
- fee_dki = &issue->fee_refund;
+ fee_claimed = &tl->details.refund->refund_fee;
if (GNUNET_OK !=
TALER_amount_add (&refunds,
&refunds,
@@ -547,7 +553,7 @@ check_transaction_history_for_deposit (
if (GNUNET_OK !=
TALER_amount_add (&expenditures,
&expenditures,
- fee))
+ fee_claimed))
{
GNUNET_break (0);
return GNUNET_SYSERR;
@@ -572,19 +578,28 @@ check_transaction_history_for_deposit (
}
refund_deposit_fee = GNUNET_YES;
}
- /* Check that the fees given in the transaction list and in dki match */
- TALER_amount_ntoh (&tmp,
- fee_dki);
- if (0 !=
- TALER_amount_cmp (&tmp,
- fee))
{
- /* Disagreement in fee structure within DB, should be impossible! */
- GNUNET_break (0);
- return GNUNET_SYSERR;
+ struct TALER_Amount fee_expected;
+
+ /* Check that the fees given in the transaction list and in dki match */
+ TALER_amount_ntoh (&fee_expected,
+ &issue->fee_refund);
+ if (0 !=
+ TALER_amount_cmp (&fee_expected,
+ fee_claimed))
+ {
+ /* Disagreement in fee structure between exchange and auditor! */
+ report_amount_arithmetic_inconsistency ("refund fee",
+ UINT64_MAX,
+ fee_claimed,
+ &fee_expected,
+ 1);
+ }
}
break;
case TALER_EXCHANGEDB_TT_OLD_COIN_RECOUP:
+ /* We count recoups of the coin as expenditures, as it
+ equivalently decreases the remaining value of the recouped coin. */
amount_with_fee = &tl->details.old_coin_recoup->value;
if (GNUNET_OK !=
TALER_amount_add (&refunds,
@@ -643,19 +658,22 @@ check_transaction_history_for_deposit (
return GNUNET_SYSERR;
}
- /* Now check that 'spent' is less or equal than the total coin value */
- TALER_amount_ntoh (&value,
- &issue->value);
- if (1 == TALER_amount_cmp (&spent,
- &value))
{
- /* spent > value */
- report_coin_arithmetic_inconsistency ("spend",
- coin_pub,
- &spent,
- &value,
- -1);
- return GNUNET_SYSERR;
+ struct TALER_Amount value;
+ /* Now check that 'spent' is less or equal than the total coin value */
+ TALER_amount_ntoh (&value,
+ &issue->value);
+ if (1 == TALER_amount_cmp (&spent,
+ &value))
+ {
+ /* spent > value */
+ report_coin_arithmetic_inconsistency ("spend",
+ coin_pub,
+ &spent,
+ &value,
+ -1);
+ return GNUNET_SYSERR;
+ }
}
/* Finally, update @a merchant_gain by subtracting what he "lost"
@@ -674,20 +692,24 @@ check_transaction_history_for_deposit (
merchant_gain,
deposit_fee));
}
- if (GNUNET_SYSERR ==
- TALER_amount_subtract (&final_gain,
- merchant_gain,
- &merchant_loss))
{
- /* refunds above deposits? Bad! */
- report_coin_arithmetic_inconsistency ("refund (merchant)",
- coin_pub,
- merchant_gain,
- &merchant_loss,
- 1);
- return GNUNET_SYSERR;
+ struct TALER_Amount final_gain;
+
+ if (GNUNET_SYSERR ==
+ TALER_amount_subtract (&final_gain,
+ merchant_gain,
+ &merchant_loss))
+ {
+ /* refunds above deposits? Bad! */
+ report_coin_arithmetic_inconsistency ("refund (merchant)",
+ coin_pub,
+ merchant_gain,
+ &merchant_loss,
+ 1);
+ return GNUNET_SYSERR;
+ }
+ *merchant_gain = final_gain;
}
- *merchant_gain = final_gain;
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
"Final merchant gain after refunds is %s\n",
TALER_amount2s (deposit_gain));