Universal Digital Payment Network (UDPN) has launched a digital currency sandbox for commercial banks and central banks. UDPN was launched at Davos last year and is committed to achieving interoperability of digital currencies (including stablecoins and CBDCs). After collaborating with over 25 global commercial banks, central banks, and technology companies, the network has launched a sandbox where members can learn about digital currency technology, test built-in use cases, and develop their own new custom use cases. Commercial and central banks have a secure environment to control and provide licensed access to other institutions in their ecosystem. The sandbox has a range of digital currency technologies, including retail CBDCs, wholesale CBDCs, tokenized deposits, stablecoins, dedicated currencies, as well as securities and bond tokenization systems. It also includes a complete retail CBDC system for banks to test quota management, issuance, circulation, third-party access APIs, as well as wallet and transaction management.