[Assist] boot.cfg: encrypted root partition

[Stayvoid]

Hello,

How would you configure boot.cfg if your root partition is encrypted?

For example:
/dev/sda1 boot
/dev/sda2 swap
/dev/sda3 main

/dev/sda2 and /dev/sda3 are encrypted, but they can be accessed via
/dev/mapper (e.g. /dev/mapper/swap).

Thanks