"The Galactic Credit Standard, simply called credit, colloquially referred to as Republic Dactaries, and later known as the Imperial Credit, was the main currency in use in the galaxy since the time of the Galactic Republic."
"From its inception, the credit was backed by the immense wealth of the planet Muunilinst and the InterGalactic Banking Clan (IGBC). During the Clone Wars, the IGBC backed the currencies of both sides, as it would do again decades later for the New Republic and Imperial Remnant."