diff --git a/config/core_constants.js b/config/core_constants.js
index <HASH>..<HASH> 100644
--- a/config/core_constants.js
+++ b/config/core_constants.js
@@ -55,3 +55,5 @@ define('OST_MEMBER_CONFIG_FILE_PATH', process.env.OST_MEMBER_CONFIG_FILE_PATH);
 
 define('OST_VALUE_GAS_LIMIT', 4700000);
 define('OST_UTILITY_GAS_LIMIT', 9000000);
+
+define('OST_TRANSACTION_LOGS_FOLDER', process.env.OST_TRANSACTION_LOGS_FOLDER);
\ No newline at end of file
code to log transactions into a file