You're looking for the 'now' variable. E.g.:
// Ensure data being written is in the future.
".write": "newData.val() >= now"
Domanda
Is there a way to use Firebase.ServerValue.TIMESTAMP or new Date().getTime() in firebase security rules to check against a timestamp value?
Soluzione
You're looking for the 'now' variable. E.g.:
// Ensure data being written is in the future.
".write": "newData.val() >= now"