In Jordan, the currency is called Jordanian Dinar, often shorted to JD. The official currency abbreviation is JOD, which is used everywhere in Jordan.
There are plenty of banks in Jordan. Some of them operate in other countries around the world. Currency exchange stores offer many financial services such as transferring money abroad, exchanging currency, etc.
Credit cards and the ATM cards provided by Jordanian banks are widely accepted in malls, restaurants, and such. However, it is good advice to always have cash with you, in case the digital payment options are not available or not functioning in Downtown or in smaller restaurants as well as in taxis you will not get far with plastic money.