Function cavage_verify_with_policy 

pub fn cavage_verify_with_policy<B, F>(
    req: &Request<B>,
    policy: &VerifyPolicy,
    now: DateTime<Utc>,
    resolve_key: F,
) -> Result<CavageVerified, Error>
where
    F: FnOnce(&str) -> Result<VerifyingKey, Error>,

Verifies a Cavage-signed request with replay-protection.

Equivalent to cavage_verify except that policy is consulted to reject stale, future-dated or expired timestamps against now. Most production callers should use this form with VerifyPolicy::mastodon (or their own tuning) and Utc::now().

Errors

Same as cavage_verify plus Error::TimestampTooOld, Error::TimestampInFuture, Error::TimestampExpired and Error::TimestampMissing when the policy is violated.