database.rules.json

// CHALLENGE Realtime DB
// See https://firebase.google.com/docs/database/security/

// Hint:  database.rules.json is just JSON
//        The nodes under "rules" map to the data tree
//        `$` indicates a wildcard name that matches
//        A wildcard will match all otherwise-unspecified attributes in that part of the JSON
// Example: /production/userWriteable/parties/123456
//          $environment == "production"
//          $objectType == "parties"
//          $uid == "123456"
{
  "rules": {
    "$environment": {
      "userWriteable": {
        "$objectType": {
          "$uid": {
            // Create a ".write" rule to verify that auth.uid equals $uid
            ".write": "auth.uid == $uid"
          }
        }
      }
    }
  }
}