"The UPC protocol facilitates payments through an entity, called the UPC hub (or server — we use the terms interchangeably), which acts as a gateway to receive payment requests from registered sending parties and routes them to registered recipient parties,
UPC is acting as a 'Gateway' between both #CBDCs which is the method that quant have taken with their API gateway #Interoperability solution.
"Ultimately, Visa aims for UPC to serve as a "network of blockchain networks" to move digital currencies around."
When it comes to interop, providing direct connection is extremely important, having one connector (-C-) is not recommended due to requiring the infrastructure in place for the connector.
Quant provides pure interoperability.
References in the #VISA document to #ODAP which is being worked on by Quant, MIT and others.