During the Clone Wars, the Galactic Republic made a deal with the Hutt Cartel to use hyperspace lanes through Hutt territory for Republic military traffic.
After the Clone Wars ended, the Galactic Republic was transformed into the Galactic Empire. How has Imperial-Hutt relations and diplomatic agreements changed since the Republic era?
Looking for both canon and Legends answers, since I'm assuming there's not much in the former to go on.