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more documenting, checking for consistency between prepared statements and functional logic

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This commit is contained in:
Christian Grothoff 2015-06-03 15:41:09 +02:00
parent d4f5af2151
commit c3ab96b242
3 changed files with 124 additions and 28 deletions
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14
src/include/taler_amount_lib.h
View File

@ -181,6 +181,20 @@ TALER_amount_cmp_currency (const struct TALER_Amount *a1,
const struct TALER_Amount *a2);
/**
* Test if @a a1 and @a a2 are the same currency, NBO variant.
*
* @param a1 amount to test
* @param a2 amount to test
* @return #GNUNET_YES if @a a1 and @a a2 are the same currency
* #GNUNET_NO if the currencies are different
* #GNUNET_SYSERR if either amount is invalid
*/
int
TALER_amount_cmp_currency_nbo (const struct TALER_AmountNBO *a1,
const struct TALER_AmountNBO *a2);
/**
* Perform saturating subtraction of amounts.
*

101
src/mintdb/plugin_mintdb_postgres.c
View File

@ -208,7 +208,7 @@ postgres_create_tables (void *cls,
/* Denomination table for holding the publicly available information of
denominations keys. The denominations are to be referred to by using
foreign keys. The denominations are deleted by a housekeeping tool;
hence, do not use `ON DELETE CASCASE' on these rows in the tables
hence, do not use `ON DELETE CASCADE' on these rows in the tables
referencing these rows */
SQLEXEC ("CREATE TABLE IF NOT EXISTS denominations"
"(pub BYTEA PRIMARY KEY"
@ -267,9 +267,9 @@ postgres_create_tables (void *cls,
TODO: maybe add timestamp of when the operation was performed, so we
can influence the reserves' expiration_date not just based on
incoming but also based on outgoing transactions?
TODO: is blind_ev really a _primary key_? Is this constraint useful? */
TODO: is h_blind_ev really a _primary key_? Is this constraint useful? */
SQLEXEC ("CREATE TABLE IF NOT EXISTS collectable_blindcoins"
"(blind_ev BYTEA PRIMARY KEY"
"(h_blind_ev BYTEA PRIMARY KEY"
",denom_pub BYTEA NOT NULL REFERENCES denominations (pub)"
",denom_sig BYTEA NOT NULL"
",reserve_pub BYTEA NOT NULL CHECK (LENGTH(reserve_pub)=32) REFERENCES reserves (reserve_pub) ON DELETE CASCADE"
@ -431,6 +431,7 @@ postgres_prepare (PGconn *db_conn)
PQclear (result); result = NULL; \
} while (0);
/* Used in #postgres_insert_denomination() */
PREPARE ("insert_denomination",
"INSERT INTO denominations "
"(pub"
@ -454,17 +455,23 @@ postgres_prepare (PGconn *db_conn)
"($1, $2, $3, $4, $5, $6,"
"$7, $8, $9, $10, $11, $12, $13, $14, $15, $16, $17);",
14, NULL);
PREPARE ("get_reserve",
/* FIXME: #3808: need a 'select_denominations' for auditor */
/* Used in #postgres_reserve_get() */
PREPARE ("reserve_get",
"SELECT"
" current_balance_val"
",current_balance_frac"
",current_balance_curr"
",expiration_date "
"FROM reserves "
"WHERE reserve_pub=$1 "
"LIMIT 1; ",
",expiration_date"
" FROM reserves"
" WHERE reserve_pub=$1"
" LIMIT 1;",
1, NULL);
PREPARE ("create_reserve",
/* Used in #postgres_reserves_in_insert() when the reserve is new */
PREPARE ("reserve_create",
"INSERT INTO reserves "
"(reserve_pub"
",current_balance_val"
@ -474,7 +481,8 @@ postgres_prepare (PGconn *db_conn)
") VALUES "
"($1, $2, $3, $4, $5);",
5, NULL);
PREPARE ("update_reserve",
/* Used in #postgres_reserves_update() when the reserve is updated */
PREPARE ("reserve_update",
"UPDATE reserves"
" SET"
" expiration_date=$1 "
@ -482,7 +490,8 @@ postgres_prepare (PGconn *db_conn)
",current_balance_frac=$3 "
"WHERE current_balance_curr=$4 AND reserve_pub=$5",
5, NULL);
PREPARE ("create_reserves_in_transaction",
/* Used in #postgres_reserves_in_insert() to store transaction details */
PREPARE ("reserves_in_add_transaction",
"INSERT INTO reserves_in "
"(reserve_pub"
",balance_val"
@ -493,19 +502,28 @@ postgres_prepare (PGconn *db_conn)
") VALUES "
"($1, $2, $3, $4, $5, $6);",
6, NULL);
PREPARE ("get_reserves_in_transactions",
/* Used in #postgres_get_reserve_history() to obtain inbound transactions
for a reserve */
PREPARE ("reserves_in_get_transactions",
"SELECT"
" balance_val"
",balance_frac"
",balance_curr"
",expiration_date"
",details"
",expiration_date" /* NOTE: not used (yet), #3817 */
",details" /* NOTE: not used (yet), #3817 */
" FROM reserves_in"
" WHERE reserve_pub=$1",
1, NULL);
/* Used in #postgres_insert_collectable_blindcoin() to store
the signature of a blinded coin with the blinded coin's
details before returning it during /withdraw/sign. We store
the coin's denomination information (public key, signature)
and the blinded message as well as the reserve that the coin
is being withdrawn from and the signature of the message
authorizing the withdrawal. */
PREPARE ("insert_collectable_blindcoin",
"INSERT INTO collectable_blindcoins "
"(blind_ev"
"(h_blind_ev"
",denom_pub"
",denom_sig"
",reserve_pub"
@ -513,6 +531,10 @@ postgres_prepare (PGconn *db_conn)
") VALUES "
"($1, $2, $3, $4, $5);",
5, NULL);
/* Used in #postgres_get_collectable_blindcoin() to
locate the response for a /withdraw/sign request
using the hash of the blinded message. Used to
make sure /withdraw/sign requests are idempotent. */
PREPARE ("get_collectable_blindcoin",
"SELECT"
" denom_pub"
@ -520,17 +542,23 @@ postgres_prepare (PGconn *db_conn)
",reserve_sig"
",reserve_pub"
" FROM collectable_blindcoins"
" WHERE blind_ev=$1",
" WHERE h_blind_ev=$1",
1, NULL);
/* Used during #postgres_get_reserve_history() to
obtain all of the /withdraw/sign operations that
have been performed on a given reserve. (i.e. to
demonstrate double-spending) */
PREPARE ("get_reserves_blindcoins",
"SELECT"
" blind_ev"
" h_blind_ev"
",denom_pub"
",denom_sig"
",reserve_sig"
" FROM collectable_blindcoins"
" WHERE reserve_pub=$1;",
1, NULL);
/* refreshing */
PREPARE ("get_refresh_session",
"SELECT"
@ -914,6 +942,17 @@ postgres_insert_denomination (void *cls,
TALER_PQ_query_param_amount_nbo (&issue->fee_refresh),
TALER_PQ_query_param_end
};
/* check fees match coin currency */
GNUNET_assert (GNUNET_YES ==
TALER_amount_cmp_currency_nbo (&issue->value,
&issue->fee_withdraw));
GNUNET_assert (GNUNET_YES ==
TALER_amount_cmp_currency_nbo (&issue->value,
&issue->fee_deposit));
GNUNET_assert (GNUNET_YES ==
TALER_amount_cmp_currency_nbo (&issue->value,
&issue->fee_refresh));
result = TALER_PQ_exec_prepared (session->conn,
"insert_denomination",
params);
@ -958,7 +997,7 @@ postgres_reserve_get (void *cls,
};
result = TALER_PQ_exec_prepared (session->conn,
"get_reserve",
"reserve_get",
params);
if (PGRES_TUPLES_OK != PQresultStatus (result))
{
@ -1010,7 +1049,7 @@ postgres_reserves_update (void *cls,
TALER_PQ_query_param_end
};
result = TALER_PQ_exec_prepared (session->conn,
"update_reserve",
"reserve_update",
params);
if (PGRES_COMMAND_OK != PQresultStatus(result))
{
@ -1082,7 +1121,7 @@ postgres_reserves_in_insert (void *cls,
TALER_PQ_query_param_end
};
result = TALER_PQ_exec_prepared (session->conn,
"create_reserve",
"reserve_create",
params);
if (PGRES_COMMAND_OK != PQresultStatus(result))
{
@ -1122,7 +1161,7 @@ postgres_reserves_in_insert (void *cls,
TALER_PQ_query_param_end
};
result = TALER_PQ_exec_prepared (session->conn,
"create_reserves_in_transaction",
"reserves_in_add_transaction",
params);
if (PGRES_COMMAND_OK != PQresultStatus(result))
{
@ -1165,7 +1204,7 @@ postgres_reserves_in_insert (void *cls,
/**
* Locate the response for a /withdraw request under the
* Locate the response for a /withdraw/sign request under the
* key of the hash of the blinded message.
*
* @param cls the `struct PostgresClosure` with the plugin-specific state
@ -1239,8 +1278,8 @@ postgres_get_collectable_blindcoin (void *cls,
* @param cls the `struct PostgresClosure` with the plugin-specific state
* @param session database connection to use
* @param h_blind hash of the blinded message
* @param withdraw amount by which the reserve will be withdrawn with this
* transaction
* @param withdraw amount by which the reserve will be reduced with this
* transaction (coin value plus fee)
* @param collectable corresponding collectable coin (blind signature)
* if a coin is found
* @return #GNUNET_SYSERR on internal error
@ -1341,7 +1380,7 @@ postgres_get_reserve_history (void *cls,
};
result = TALER_PQ_exec_prepared (session->conn,
"get_reserves_in_transactions",
"reserves_in_get_transactions",
params);
if (PGRES_TUPLES_OK != PQresultStatus (result))
{
@ -1354,6 +1393,12 @@ postgres_get_reserve_history (void *cls,
"Asked to fetch history for an unknown reserve.\n");
goto cleanup;
}
/* FIXME: maybe also use the 'expiration_date' and 'details'
values and return those as well? While right now they
are unnecessary, the 'expiration_date' should become the
original transfer date, and then it will be useful;
similarly, 'details' might become useful for reserve refunds
in the future. (#3817) */
while (0 < rows)
{
bt = GNUNET_new (struct TALER_MINTDB_BankTransfer);
@ -1386,7 +1431,7 @@ postgres_get_reserve_history (void *cls,
PQclear (result);
result = NULL;
{
struct GNUNET_HashCode blind_ev;
struct GNUNET_HashCode h_blind_ev;
struct TALER_ReserveSignatureP reserve_sig;
struct TALER_MINTDB_CollectableBlindcoin *cbc;
struct GNUNET_CRYPTO_rsa_PublicKey *denom_pub;
@ -1410,7 +1455,7 @@ postgres_get_reserve_history (void *cls,
goto cleanup;
}
struct TALER_PQ_ResultSpec rs[] = {
TALER_PQ_result_spec_auto_from_type ("blind_ev", &blind_ev),
TALER_PQ_result_spec_auto_from_type ("h_blind_ev", &h_blind_ev),
TALER_PQ_result_spec_rsa_public_key ("denom_pub", &denom_pub),
TALER_PQ_result_spec_rsa_signature ("denom_sig", &denom_sig),
TALER_PQ_result_spec_auto_from_type ("reserve_sig", &reserve_sig),
@ -1430,7 +1475,7 @@ postgres_get_reserve_history (void *cls,
cbc = GNUNET_new (struct TALER_MINTDB_CollectableBlindcoin);
cbc->sig.rsa_signature = denom_sig;
cbc->denom_pub.rsa_public_key = denom_pub;
cbc->h_coin_envelope = blind_ev;
cbc->h_coin_envelope = h_blind_ev;
cbc->reserve_pub = *reserve_pub;
cbc->reserve_sig = reserve_sig;
rh_head->next = GNUNET_new (struct TALER_MINTDB_ReserveHistory);

37
src/util/amount.c
View File

@ -237,6 +237,20 @@ test_valid (const struct TALER_Amount *a)
}
/**
* Test if @a a is valid, NBO variant.
*
* @param a amount to test
* @return #GNUNET_YES if valid,
* #GNUNET_NO if invalid
*/
static int
test_valid_nbo (const struct TALER_AmountNBO *a)
{
return ('\0' != a->currency[0]);
}
/**
* Test if @a a1 and @a a2 are the same currency.
*
@ -260,6 +274,29 @@ TALER_amount_cmp_currency (const struct TALER_Amount *a1,
}
/**
* Test if @a a1 and @a a2 are the same currency, NBO variant.
*
* @param a1 amount to test
* @param a2 amount to test
* @return #GNUNET_YES if @a a1 and @a a2 are the same currency
* #GNUNET_NO if the currencies are different,
* #GNUNET_SYSERR if either amount is invalid
*/
int
TALER_amount_cmp_currency_nbo (const struct TALER_AmountNBO *a1,
const struct TALER_AmountNBO *a2)
{
if ( (GNUNET_NO == test_valid_nbo (a1)) ||
(GNUNET_NO == test_valid_nbo (a2)) )
return GNUNET_SYSERR;
if (0 == strcasecmp (a1->currency,
a2->currency))
return GNUNET_YES;
return GNUNET_NO;
}
/**
* Compare the value/fraction of two amounts. Does not compare the currency.
* Comparing amounts of different currencies will cause the program to abort().