From a smart contract on Base, how can you look up an ENS onchain for a given address?

@day---break, day---break.com // nf.td/iam

Like a Basename? I think you could do that through the Resolver on Base. If you're trying to bridge an ENS on mainnet you might need an offchain gateway

DX Engineer | Head of Developer Relations at /pinata | Building orbiter.host | stevedylan.dev/links

Hoping for both. ENS, with a graceful fallback to Basename, then address. 

fname might be a better option for this

You can definitely make it happen by following some resolver examples, but it would require some offchain API work to bridge Base with Mainnet. That's what we had to do with Orbiter, and it's technically what Base does with Basenames to a point

I think you could try doing it all mainnet with a flow like:
- Query Mainnet ENS resolver 
- Query ENS subname on base.eth 
Something like that

Might need to go down that road. Hoping to keep it all on Base somehow, this doesn't need a lot of overhead...