Using fact values in event parameters

I've tried searching for it, but I couldn't find if it is somehow possible to use fact values in the event section of a rule. So something like:
```
 ....
    event: {
      type: 'myEventType',
      params: {
        myParam: {
            fact: 'myFact',
            path: '$.myPath' 
      } // Should resolve to a value in myFact
```

What would be the way to achieve such a thing?