Mastercard's platform—or "sandbox" in tech parlance—will let central banks issue digital versions of their currency in a controlled environment, and test how those currencies plug into existing bank and payment networks, and to see if they are practical for consumers to buy goods and services.
The Mastercard initiative comes at a time of growing interest in digital currency among central banks. A 2018 survey by the International Monetary Fund, cited by the Wall Street Journal, found government bankers are experimenting with the technology as a way to lower costs and to blunt the rise of private cryptocurrencies like Bitcoin. A more recent survey by the Bank for International Settlements found that 80% of the world's central banks are engaged in some form of digital currency research.