This allows FBE(File Based Encryption) with f2fs.
These files are for Snapdragon 845 devices running arter97 kernel.

If you are using ANYTHING ELSE, ask your kernel developer and ensure this setup is supported.

TWRP may not be able to read /data after applying FBE on top of f2fs.
Pie-built TWRP is required, with specific TWRP fstab.

My Razer Phone 2's TWRP currently doesn't support this as well.