# replaces any existing records that are __eq__ to each other which

# removes the risk that accessing the cache from the wrong

# direction would return the old incorrect entry.

if record.key not in self.cache:

if (store := self.cache.get(record.key)) is None:

store = self.cache[record.key] = {}

else:

store = self.cache[record.key]

new = record not in store and not isinstance(record, DNSNsec)

store[record] = record

when = record.created + (record.ttl * 1000)

if isinstance(record, DNSService):

service_record = record

if service_record.server_key not in self.service_cache:

if (service_store := self.service_cache.get(service_record.server_key)) is None:

service_store = self.service_cache[service_record.server_key] = {}

else:

service_store = self.service_cache[service_record.server_key]

service_store[service_record] = service_record

return new