In Giresun's little flatiron building, Fındıkevi is one of a trio of nearby boutiques dedicated to the hazelnut in all its guises: salted, chillied, ground and/or covered in chocolate. It's just 80m up Gazi Caddesi from the main square.
There's another branch at 29 Fatih Caddesi that also sells 'Black Sea Chocolate'.