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author | Christian Grothoff <christian@grothoff.org> | 2017-05-08 13:31:28 +0200 |
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committer | Christian Grothoff <christian@grothoff.org> | 2017-05-08 13:31:28 +0200 |
commit | 8f854fb04c02f2e10ab41be3140bdf9aa05e0a83 (patch) | |
tree | 08802e0ea0dc5648b5ac7d668cae7286b393b33b /src/exchangedb/plugin_exchangedb_postgres.c | |
parent | 20aad54c3e010020185c76d9e0727f3f497c2f73 (diff) | |
download | exchange-8f854fb04c02f2e10ab41be3140bdf9aa05e0a83.tar.xz |
add 'get_latest_reserve_in_reference' to exchangedb API
Diffstat (limited to 'src/exchangedb/plugin_exchangedb_postgres.c')
-rw-r--r-- | src/exchangedb/plugin_exchangedb_postgres.c | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/src/exchangedb/plugin_exchangedb_postgres.c b/src/exchangedb/plugin_exchangedb_postgres.c index 0bf82f048..1ba9914fd 100644 --- a/src/exchangedb/plugin_exchangedb_postgres.c +++ b/src/exchangedb/plugin_exchangedb_postgres.c @@ -771,6 +771,15 @@ postgres_prepare (PGconn *db_conn) /* Used in postgres_select_reserves_in_above_serial_id() to obtain inbound transactions for reserves with serial id '\geq' the given parameter */ + PREPARE ("reserves_in_get_latest_wire_reference", + "SELECT" + " wire_reference" + " FROM reserves_in" + " ORDER BY reserve_in_serial_id DESC LIMIT 1", + 0, NULL); + + /* Used in postgres_select_reserves_in_above_serial_id() to obtain inbound + transactions for reserves with serial id '\geq' the given parameter */ PREPARE ("audit_reserves_in_get_transactions_incr", "SELECT" " reserve_pub" @@ -2251,6 +2260,66 @@ postgres_reserves_in_insert (void *cls, /** + * Obtain the most recent @a wire_reference that was inserted via @e reserves_in_insert. + * + * @param cls the @e cls of this struct with the plugin-specific state + * @param session the database session handle + * @param[out] wire_reference set to unique reference identifying the wire transfer (binary blob) + * @param[out] wire_reference_size set to number of bytes in @a wire_reference + * @return #GNUNET_OK upon success; #GNUNET_NO if we never got any incoming transfers + * #GNUNET_SYSERR upon failures (DB error) + */ +static int +postgres_get_latest_reserve_in_reference (void *cls, + struct TALER_EXCHANGEDB_Session *session, + void **wire_reference, + size_t *wire_reference_size) +{ + PGresult *result; + struct GNUNET_PQ_QueryParam params[] = { + GNUNET_PQ_query_param_end + }; + int ret; + + ret = GNUNET_SYSERR; + result = GNUNET_PQ_exec_prepared (session->conn, + "reserves_in_get_latest_wire_reference", + params); + if (PGRES_TUPLES_OK != PQresultStatus (result)) + { + QUERY_ERR (result, session->conn); + goto cleanup; + } + if (0 == PQntuples (result)) + { + ret = GNUNET_NO; + goto cleanup; + } + { + struct GNUNET_PQ_ResultSpec rs[] = { + GNUNET_PQ_result_spec_variable_size ("wire_reference", + wire_reference, + wire_reference_size), + GNUNET_PQ_result_spec_end + }; + + if (GNUNET_OK != + GNUNET_PQ_extract_result (result, + rs, + 0)) + { + GNUNET_break (0); + goto cleanup; + } + } + ret = GNUNET_OK; + cleanup: + PQclear (result); + return ret; +} + + +/** * Locate the response for a /reserve/withdraw request under the * key of the hash of the blinded message. * @@ -6657,6 +6726,7 @@ libtaler_plugin_exchangedb_postgres_init (void *cls) plugin->get_denomination_info = &postgres_get_denomination_info; plugin->reserve_get = &postgres_reserve_get; plugin->reserves_in_insert = &postgres_reserves_in_insert; + plugin->get_latest_reserve_in_reference = &postgres_get_latest_reserve_in_reference; plugin->get_withdraw_info = &postgres_get_withdraw_info; plugin->insert_withdraw_info = &postgres_insert_withdraw_info; plugin->get_reserve_history = &postgres_get_reserve_history; |