database-rules.json

{
  "rules": {
    "codelabs": {
      ".read": "true",
      ".write": "false"
    },
    "users": {
      ".read": "true",
      ".write": "false",
      "$uid": {
        ".read": "true",
        ".write": "auth.uid == $uid",
        "chapter": {
          ".write": "!data.exists() && auth.uid == $uid"
        },
        "displayName": {
          ".write": "auth.uid == $uid"
        },
        "photoURL": {
          ".write": "auth.uid == $uid"
        },
        "android": {
          ".validate": "newData.isNumber() && newData.val() >= 0",
          ".write": "auth.uid == $uid"
        },
        "cloud": {
          ".validate": "newData.isNumber() && newData.val() >= 0",
          ".write": "auth.uid == $uid"
        },
        "firebase": {
          ".validate": "newData.isNumber() && newData.val() >= 0",
          ".write": "auth.uid == $uid"
        },
        "vr": {
          ".validate": "newData.isNumber() && newData.val() >= 0",
          ".write": "auth.uid == $uid"
        },
        "web": {
          ".validate": "newData.isNumber() && newData.val() >= 0",
          ".write": "auth.uid == $uid"
        },
        "score": {
          ".validate": "newData.isNumber() && newData.val() >= 0",
          ".write": "auth.uid == $uid"
        },
        "codelabs": {
          "$codelab_key": {
            "cA": {
              ".validate": "!data.exists() && newData.isNumber() && newData.val() >= 0 && newData.val() <= 5"
            },
            "score": {
              ".validate": "!data.exists() && newData.isNumber() && newData.val() >= 0 && newData.val() <= 100"
            },
            "start_quiz": {
              ".validate": "!data.exists()"
            },
            "start_time": {
              ".validate": "!data.exists()"
            },
            "end_quiz": {
              ".validate": "!data.exists()"
            },
            "end_time": {
              ".validate": "!data.exists()"
            }
          }
        }
      }
    }
  }
}