How do I inspect rate limit usage without consuming a request?

[clyxudev]

I need to show remaining capacity in a UI but should not spend a request. Which method is read-only?

[shnwazdeveloper]

Use limiter.snapshot(key) to read the current bucket without adding cost. It returns limit, used, remaining, and resetAt. check(key, cost) also does not mutate the bucket, while consume() and assert() do consume capacity when allowed.