There is default configuration for Narayana provided in XML files jbossts-properties.xml. They are part of the released jar files (they can be found at `META-INF` directory).
These configuration files are different depending on the artifact. For example configuration defined in jbossts-properties.xml for JTS is different from JTA version - e.g. recovery modules are different and so.
The configurations should be a bit narrowed to use better defaults. The discussion about this topic is at https://developer.jboss.org/message/991332