Solar Credit
From FenWiki
The Solar Credit is the local currency of Fenspace, issued by the Bank of Sol. The value of the Solar Credit has been pegged to the Australian Dollar at par since its creation. The Solar Credit's three-letter currency code is FSC, short for "Fen Solar Credit".
The currency exists mostly in electronic form, although the Bank of Sol has contracted with Hephaestus Mining and Metalworking, Unltd. to produce proof and commemorative coins for the collectors' market. It does not exist in paper form.