Before you begin this section, you should have completed all of the basic lessons, or have a good understanding of Fluree schema and adding data.
Smart functions are the engine for setting permissions in Fluree.
Every time a transaction is issued, that transaction might trigger various smart functions. In addition, when an end user (not a node) issues a query, various smart functions might be triggered.
Smart functions will either return
false. If every smart function that is triggered returns
true, then the transaction will go through. If even one triggered smart function returns
false, then the transaction will fail, or in the case of a query- that piece of information will not be displayed to the user.
Smart functions are stored in the
_fn collection. From the
_fn collection, smart functions can be referenced in a variety of places. Functions stored in different locations are triggered in slightly different ways.