The US CBDC digital currency proposal is expected later this month from MIT and Boston Fed, including open-source reference code, https://dci.mit.edu/building-a-hypothetical-cbdc
The whole speech is worth the read, the synopsis is:
"To conclude, I emphasize three points. First, the U.S. dollar payment system is very good, and it is getting better. Second, the potential benefits of a Federal Reserve CBDC are unclear. Third, developing a CBDC could, I believe, pose considerable risks.
So, our work is cut out for us as we proceed to rigorously evaluate the case for developing a Federal Reserve CBDC. Even if other central banks issue successful CBDCs, we cannot assume that the Federal Reserve should issue a CBDC. The process that Chair Powell recently announced is a genuinely open process without a foregone conclusion, although obviously I think the bar to establishing a U.S. CBDC is a high one. The upcoming discussion paper that constitutes the first step in this process will importantly ask for input from the public. I look forward to reviewing public input on the discussion paper, which will inform the Federal Reserve's ultimate evaluation of a potential CBDC."
Parachute Pants and Central Bank Money, Vice Chair for Supervision Randal K. Quarles at the 113th Annual Utah Bankers Association Convention, Sun Valley, Idaho
08 June 2021, "Central bank digital currency: the quest for minimally invasive technology", https://www.bis.org/publ/work948.htm
> Almost 50 central banks have already launched designs for central bank digital currencies (CBDCs) or prototypes ... The paper discusses ... what they imply for the financial system and the central bank of the future. It sets out the requirements for a “minimally invasive” CBDC design ... digital banknotes that run on “intermediated” or “hybrid” CBDC architectures show promise. Supported with technology to facilitate record-keeping by private sector entities of direct claims on the central bank, their economic design should emphasise the use of the CBDC as medium of exchange.
28 Jan 2021, "FedAccounts: Digital Dollars", https://www.gwlr.org/fedaccounts-digital-dollars/
> Congress should authorize the Federal Reserve to give everyone—individuals, businesses, and institutions—the option to maintain accounts at the central bank. We call these accounts FedAccounts. Unlike the CBDC approaches currently under discussion, which would use complicated and inefficient distributed ledger technology and be walled off from the existing system of money and payments, FedAccounts would be seamlessly interoperable with the mainstream payment system, relying on technologies that the Federal Reserve has used for decades.