Cashu Nutshell v0.15.0: Support for Cashu v1 Protocol

"The Cashu v1 protocol paves the way for Ecash with multiple denominations (sat, msat, usd, ...) and payment methods (Lightning, On-chain, ...). This update has been a long time in the making, with significant changes in the overall software architecture and several database migrations."

https://www.nobsbitcoin.com/cashu-nutshell-v0-15-0/