{
   "rules": {
    "chats": {
      "$chatID": {
        "messages": {
          ".read": "data.parent().child('members').child(auth.uid).exists()",
          ".write": "data.parent().child('members').child(auth.uid).val() == 'owner' || data.parent().child('members').child(auth.uid).val()=='chatter'"
        },
        "members": {
          ".read": "data.child(auth.uid).val() == 'owner'",
          ".write": "data.child(auth.uid).val() == 'owner' ||(!data.exists()&&newData.child(auth.uid).val()=='owner')"
        },
        "pending": {
          ".read": "data.parent().child('members').child(auth.uid).val() === 'owner'",
          ".write": "data.parent().child('members').child(auth.uid).val() === 'owner'",
          "$uid": {
            ".write": "$uid === auth.uid && !data.exists() && !data.parent().parent().child('members').child($uid).exists()"
          }
        }
      }
    }
  }
}