Bridging Digital Currencies: A Technical Model for Multi-CBDC Ecosystems

Abstract

The emergence of Central Bank Digital Currencies (CBDCs) has accelerated the digital transformation of monetary systems, yet cross-border interoperability remains fragmented across national and regional implementations. This paper presents a technical model for a multi-CBDC ecosystem designed to enable seamless value exchange between sovereign digital currencies while maintaining compliance, settlement finality and monetary sovereignty. Drawing from comparative analyses of CBDC initiatives in China, the European Union and emerging economies, the proposed model introduces a bridge-layer architecture that supports both wholesale and retail CBDCs through programmable smart contracts, distributed ledger interoperability and standardized messaging protocols.