diff options
Diffstat (limited to 'src/exchange')
| -rw-r--r-- | src/exchange/taler-exchange-httpd_db.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/src/exchange/taler-exchange-httpd_db.c b/src/exchange/taler-exchange-httpd_db.c index 0634e34f..f53600cc 100644 --- a/src/exchange/taler-exchange-httpd_db.c +++ b/src/exchange/taler-exchange-httpd_db.c @@ -2402,9 +2402,19 @@ TEH_DB_execute_payback (struct MHD_Connection *connection, return TEH_RESPONSE_reply_internal_db_error (connection, TALER_EC_PAYBACK_HISTORY_DB_ERROR); } - TALER_amount_subtract (&amount, - value, - &spent); + if (GNUNET_SYSERR == + TALER_amount_subtract (&amount, + value, + &spent)) + { + GNUNET_break (0); + TEH_plugin->rollback (TEH_plugin->cls, + session); + TEH_plugin->free_coin_transaction_list (TEH_plugin->cls, + tl); + return TEH_RESPONSE_reply_internal_db_error (connection, + TALER_EC_PAYBACK_COIN_BALANCE_NEGATIVE); + } if ( (0 == amount.fraction) && (0 == amount.value) ) { |