Better yet, turn magic numbers into constant variables whose name becomes the comment. Of course, comments can also provide additional context :)
const ONE_HOUR_IN_MS = 3600000
const RESEND_DELAY = 3600000
const RESEND_DELAY_MS = ONE_HOUR_IN_MS;
const RESEND_DELAY_MS = 1 * 60 * 60 * 1000; // one hour
const ONE_HOUR_IN_MS = 3600000 const RESEND_DELAY = ONE_HOUR_IN_MS
const RESEND_DELAY_MS = 3600000; // because TTL in Agora