I know this is a bit late, but I came up with a solution to both propblems: how to access a firebase database and how to extract from a JSON hierarchy.
Notice that loading is a two step process 1) Use the SAVE block to initilize the object on firebase (weird, but necessary). Then you can reference the object using the set block to populate the variable. Now the firebase data is accessible using thunkable VARIABLE blocks. No need to use the Get and save blocks.
You can access the data using the variable blocks, but that doesn’t address how to drill down deep into the hierarchy. The GetProperty function resolves that issue. The KeyPath parameter works just like in MIT App Inventory. Object are specified using the name, and list are accessed using the position (0 is the first position). The GetProperty function works on firebase and local JSON objects.
