Hyperledger Global Forum 2021

Digital currencies include crypto-currencies, stablecoins, eMoney and CBDCs. There is some interoperability between these systems today. Stable coins, for example, help fiat to crypto-currency interoperability. Most of this interoperability has been created in an ad-hoc fashion. The operators who facilitate this interoperability extract costs. A general description of the challenges facing digital currency interoperability is followed by a deep look at one of the current trends in implementing interoperability; message based interoperability. DLPC to ISO 20022 based systems to xcsi, a Hyperledger labs proposal that was created to formalize the semantics and syntax of such a message based system.