Nutshell v0.16.4, a Chaumian Ecash wallet and mint for Bitcoin Lightning based on the Cashu protocol, brings two new protocol spec updates to nutshell, NUT-19:Cached Response and NUT-20 Signature on Mint Quote. It also includes a new HTTP compression middleware and several bug fixes. https://github.com/cashubtc/nutshell/releases/tag/0.16.4