If you are looking to set this up, you would typically enter the Chalkis server address into the tab of Tinfoil on a Switch running custom firmware (Atmosphère). To help you further, would you like details on:
: A container format that includes the game ROM, icons, and metadata. Chalkis Switch NSP (eShop)
When you see "Chalkis Switch NSP (eShop)," it indicates the software is sourced as an . If you are looking to set this up,
How to files via USB if the shop is offline? Chalkis Switch NSP (eShop)