pub fn chain_authorizes(chain: &[&[u64]], requested_domain: u64) -> boolExpand description
A multi-link delegation chain authorizes requested_domain iff: the root holds it, every
link attenuates its predecessor (subset), and the domain survives at every level (no link
silently re-broadens authority). chain[0] is the root delegation; each later link is a
sub-delegation. Zero-heap (slice of slices).