diff options
Diffstat (limited to 'src/exchangedb')
| -rw-r--r-- | src/exchangedb/plugin_exchangedb_postgres.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/src/exchangedb/plugin_exchangedb_postgres.c b/src/exchangedb/plugin_exchangedb_postgres.c index 80f91785..925f2853 100644 --- a/src/exchangedb/plugin_exchangedb_postgres.c +++ b/src/exchangedb/plugin_exchangedb_postgres.c @@ -550,6 +550,15 @@ postgres_get_session (void *cls) " WHERE coin_pub=$1" " FOR UPDATE;", 1), + /* Used in #postgres_get_coin_denomination() to fetch + the denomination public key hash for + a coin known to the exchange. */ + GNUNET_PQ_make_prepare ("get_coin_denomination", + "SELECT" + " denom_pub_hash" + " FROM known_coins" + " WHERE coin_pub=$1", + 1), /* Lock deposit table; NOTE: we may want to eventually shard the deposit table to avoid this lock being the main point of contention limiting transaction performance. */ @@ -3008,6 +3017,45 @@ postgres_get_known_coin (void *cls, /** + * Retrieve the denomination of a known coin. + * + * @param cls the plugin closure + * @param session the database session handle + * @param coin_pub the public key of the coin to search for + * @param denom_hash[out] where to store the hash of the coins denomination + * @return transaction status code + */ +static enum GNUNET_DB_QueryStatus +postgres_get_coin_denomination (void *cls, + struct TALER_EXCHANGEDB_Session *session, + const struct + TALER_CoinSpendPublicKeyP *coin_pub, + struct GNUNET_HashCode *denom_hash) +{ + struct PostgresClosure *pc = cls; + struct GNUNET_PQ_QueryParam params[] = { + GNUNET_PQ_query_param_auto_from_type (coin_pub), + GNUNET_PQ_query_param_end + }; + struct GNUNET_PQ_ResultSpec rs[] = { + GNUNET_PQ_result_spec_auto_from_type ("denom_pub_hash", + denom_hash), + GNUNET_PQ_result_spec_end + }; + + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "Getting coin denomination of coin %s\n", + TALER_B2S (coin_pub)); + if (NULL == session) + session = postgres_get_session (pc); + return GNUNET_PQ_eval_prepared_singleton_select (session->conn, + "get_coin_denomination", + params, + rs); +} + + +/** * Insert a coin we know of into the DB. The coin can then be * referenced by tables for deposits, refresh and refund * functionality. @@ -7263,6 +7311,7 @@ libtaler_plugin_exchangedb_postgres_init (void *cls) plugin->count_known_coins = &postgres_count_known_coins; plugin->ensure_coin_known = &postgres_ensure_coin_known; plugin->get_known_coin = &postgres_get_known_coin; + plugin->get_coin_denomination = &postgres_get_coin_denomination; plugin->have_deposit = &postgres_have_deposit; plugin->mark_deposit_tiny = &postgres_mark_deposit_tiny; plugin->test_deposit_done = &postgres_test_deposit_done; |