marca de tiempo de Firebase
import firebase from 'firebase';
{
timestamp: firebase.firestore.FieldValue.serverTimestamp(),
}
Wicked Walrus
import firebase from 'firebase';
{
timestamp: firebase.firestore.FieldValue.serverTimestamp(),
}// Example 4: Compute Timestamp from Java `System.currentTimeMillis()`.
long millis = System.currentTimeMillis();
Timestamp timestamp =
Timestamp.newBuilder()
.setSeconds(millis / 1000)
.setNanos((int)(millis % 1000 * 1_000_000))
.build();