reverse lookup for released domain

[szanuje]

Hey, as far as I understand, provider.lookupAddress(...) does forward resolution to check if everything is OK.

What happens, when I request a lookup for an address that points to a domain that is released? Domain's resolver records are persisted until someone overwrites them. Does it mean that reverse lookup for such an address will return an outdated value?
In my app, the user connects the wallet and based on its address, I get the reverse lookup and show It in user's panel.

[ricmoo]

Yes, a name that has been setup that expires is still configured.

Expiration is registrar-specific, so there is no way to validate a name is unexpired (since in many contexts that doesn't have any meaningful definition). For example, on top-level ens names (like ricmoo.eth), it is based on how far into the future the name has been registered. On ENS registrars like my firefly.eth, names do not expire. Things get more interesting once we start getting into the DNSSEC names as well, which are defined by ownership of an internet DNS name, which can be transferred outside of the blockchain entirely.

Basically, if data is stale, there isn't much you can do, in general.

[ricmoo]

There is no last step there? It will look up the address for dog.eth and if that is equal to the adress, it returns the name.

See all the logic here. It returns name.

[szanuje]

I was referring to this part. check will be the forward resolution of dog.eth, so it will be different than the reverse resolution which pointed to DOG.eth. As a result, null will be returned.

[ricmoo]

Why? The forward resolution of DOG.eth is identical to the forward resolution of dog.eth. Normalization always happens. The resolveName normalizes the name.

So, if the reverse of A points to DOG.eth and dog.eth points to A, everything is kosher. If you call resolveName("RicMoo.eth") you get the same thing as resolveName("ricmoo.eth"), which is me. :)

[ricmoo]

If you try it and you are getting back null for a properly configured reverse record, definitely open an issue. :)

[szanuje]

Oh, I must have missed that, thanks!