recovery_device_realme_RMX1921

Recovery tree for Realme XT

Features

Works:

First checkout manifest :

repo init --depth=1 -u https://github.com/minimal-manifest-twrp/platform_manifest_twrp_aosp.git -b twrp-12.1
repo sync -c

Then clone the current device tree onto device/realme/RMX1921

Finally execute these:

. build/envsetup.sh
lunch twrp_RMX1921-eng
mka recoveryimage

To test it:

fastboot flash /path/to/recovery.img

This is necessary for downgrades back to stock android-9.0 (ColorOS).
Early versions of android-10.0(Realme UI v1) have decryptor built into the updater binary so this patch isnt necessary.
Later versions of android-10.0(Realme UI v1) are not ozip encrypted at all and so is android-11.0 (Realme UI v2) potentially following the OPLUS merger.
To automate renaming .ozip to .zip, ozip decrypt tool can be used with dummy key for devices launching with android 10 and above.