certificate

type Matcher[Key comparable] interface {
	// MissingNames returns any route "from" hostnames which don't have
	// a matching certificate.
	MissingNames() []string
	Update(key Key, certificateNames []string, routeNames []string)
}

type NameIndex[Key comparable] interface {
	// Add adds all the names to the index for the given key. Multiple
	// keys can be associated with the same names.
	Add(key Key, names []string)
	// Get returns all the names for the given key.
	Get(key Key) []string
	// Keys returns all the known keys. Order is non-deterministic.
	Keys() []Key
	// Lookup looks up any keys associated with the given name. Wildcard search
	// is supported (Lookup("*.example.com") -> would match a key for
	// "www.example.com"). Order is non-deterministic.
	Lookup(name string, allowWildcard bool) []Key
	// Names returns all the known names. Order is non-deterministic.
	Names() []string
	// Remove removes a key from the index and possibly all of its associated
	// names if they aren't referenced by any other keys.
	Remove(key Key)
}