The Mariana proof of concept demonstrates technical feasibility of so-called automated market-makers (AMMs) for cross-border trading and settlement of hypothetical Swiss franc, euro and Singapore dollar wholesale CBDCs (wCBDCs). It borrows ideas and concepts from DeFi and leverages a public blockchain to design and test a transnational FX interbank market using wCBDCs. https://www.bis.org/about/bisih/topic...