getprop("ro.product.device") == "merlin" || abort("E3004: This package is for \"merlin\" devices; this is a \"" + getprop("ro.product.device") + "\".");
ui_print("Source: Redmi/merlin_ru/merlin:11/RP1A.200720.011/V12.5.3.0.RJORUXM:user/release-keys");
ui_print("Target: Redmi/merlin_ru/merlin:11/RP1A.200720.011/V12.5.5.0.RJORUXM:user/release-keys");
ui_print("Verifying current system...");
getprop("ro.build.fingerprint") == "Redmi/merlin_ru/merlin:11/RP1A.200720.011/V12.5.3.0.RJORUXM:user/release-keys" ||
    getprop("ro.build.fingerprint") == "Redmi/merlin_ru/merlin:11/RP1A.200720.011/V12.5.5.0.RJORUXM:user/release-keys" ||
    abort("E3001: Package expects build fingerprint of Redmi/merlin_ru/merlin:11/RP1A.200720.011/V12.5.3.0.RJORUXM:user/release-keys or Redmi/merlin_ru/merlin:11/RP1A.200720.011/V12.5.5.0.RJORUXM:user/release-keys; this device has " + getprop("ro.build.fingerprint") + ".");
patch_partition_check(concat("EMMC:","/dev/block/platform/bootdevice/by-name/boot",":67108864:37b5d3c460942bf8dbf306a577f0383c823d9ba0"),
                      concat("EMMC:","/dev/block/platform/bootdevice/by-name/boot",":67108864:139afdf0a3a106d0c55209b64da8f3b37e4eeb12")) ||
    abort(concat("E3005: \"",concat("EMMC:","/dev/block/platform/bootdevice/by-name/boot",":67108864:37b5d3c460942bf8dbf306a577f0383c823d9ba0"),"\" or \"",concat("EMMC:","/dev/block/platform/bootdevice/by-name/boot",":67108864:139afdf0a3a106d0c55209b64da8f3b37e4eeb12"),"\" has unexpected contents."));
apply_patch_space(84475904) || abort("E3006: Not enough free space on /cache to apply patches.");
if (range_sha1(map_partition("system"), "32,1,32770,32966,98306,98502,163842,164038,229378,229574,255229,256676,256678,258118,294914,295110,301821,302137,453135,453140,468189,468243,482659,482663,711228,712173,786443,786448,802403,804837,817591,817760,817761") == "0245a03da9ea63e7438b5747a8b0e20761ffbf49" || block_image_verify(map_partition("system"), package_extract_file("system.transfer.list"), "system.new.dat", "system.patch.dat")) then
ui_print("Verified system image...");
else
check_first_block(map_partition("system"));
ifelse (block_image_recover(map_partition("system"), "32,1,32770,32966,98306,98502,163842,164038,229378,229574,255229,256676,256678,258118,294914,295110,301821,302137,453135,453140,468189,468243,482659,482663,711228,712173,786443,786448,802403,804837,817591,817760,817761") && block_image_verify(map_partition("system"), package_extract_file("system.transfer.list"), "system.new.dat", "system.patch.dat"), ui_print("system recovered successfully."), abort("E1004: system partition fails to recover"));
endif;
if (range_sha1(map_partition("vendor"), "32,1,32770,32810,44969,45153,45157,45487,46437,46461,49054,49064,49270,49344,50183,50306,97872,98304,98306,98346,98383,98457,124748,124858,163842,163882,163903,163909,164122,164627,167239,167287,167288") == "1347e3ece5f326a5af0044214890b4b0cc9044f3" || block_image_verify(map_partition("vendor"), package_extract_file("vendor.transfer.list"), "vendor.new.dat", "vendor.patch.dat")) then
ui_print("Verified vendor image...");
else
check_first_block(map_partition("vendor"));
ifelse (block_image_recover(map_partition("vendor"), "32,1,32770,32810,44969,45153,45157,45487,46437,46461,49054,49064,49270,49344,50183,50306,97872,98304,98306,98346,98383,98457,124748,124858,163842,163882,163903,163909,164122,164627,167239,167287,167288") && block_image_verify(map_partition("vendor"), package_extract_file("vendor.transfer.list"), "vendor.new.dat", "vendor.patch.dat"), ui_print("vendor recovered successfully."), abort("E2004: vendor partition fails to recover"));
endif;
if (range_sha1(map_partition("product"), "110,1,88,7329,7333,10132,10135,12945,12946,21359,21360,31287,31288,31963,31967,32768,32770,32842,32848,33014,33015,36170,36171,36533,36537,37056,37057,37069,37073,37077,37078,46829,46830,55055,55056,64898,64899,65536,65542,75983,75984,81359,81360,94130,98306,98378,104001,121409,121410,131072,131078,143280,143281,146156,146157,153458,153459,163840,163842,163914,163920,165246,165262,171881,171882,171894,171898,171901,171902,171903,171904,171905,171906,171910,171917,171919,171920,171923,171925,171926,171927,171928,171929,171940,171941,171942,171946,171950,171953,171957,171960,172409,172410,172781,172782,174267,174268,174358,229378,229450,262149,262150,294914,294986,294987,294992,295441,296334,301033,301106,301107") == "dcb68bdef6cfeadee84cf018415a9c5284470eee" || block_image_verify(map_partition("product"), package_extract_file("product.transfer.list"), "product.new.dat", "product.patch.dat")) then
ui_print("Verified product image...");
else
ifelse (block_image_recover(map_partition("product"), "110,1,88,7329,7333,10132,10135,12945,12946,21359,21360,31287,31288,31963,31967,32768,32770,32842,32848,33014,33015,36170,36171,36533,36537,37056,37057,37069,37073,37077,37078,46829,46830,55055,55056,64898,64899,65536,65542,75983,75984,81359,81360,94130,98306,98378,104001,121409,121410,131072,131078,143280,143281,146156,146157,153458,153459,163840,163842,163914,163920,165246,165262,171881,171882,171894,171898,171901,171902,171903,171904,171905,171906,171910,171917,171919,171920,171923,171925,171926,171927,171928,171929,171940,171941,171942,171946,171950,171953,171957,171960,172409,172410,172781,172782,174267,174268,174358,229378,229450,262149,262150,294914,294986,294987,294992,295441,296334,301033,301106,301107") && block_image_verify(map_partition("product"), package_extract_file("product.transfer.list"), "product.new.dat", "product.patch.dat"), ui_print("product recovered successfully."), abort("E2004: product partition fails to recover"));
endif;

# ---- start making changes here ----


# --- Start patching dynamic partitions ---


# Update dynamic partition metadata

assert(update_dynamic_partitions(package_extract_file("dynamic_partitions_op_list")));

# Patch partition system

ui_print("Patching system image after verification.");
show_progress(0.700000, 0);
block_image_update(map_partition("system"), package_extract_file("system.transfer.list"), "system.new.dat", "system.patch.dat") ||
  abort("E1001: Failed to update system image.");

# Patch partition vendor

ui_print("Patching vendor image after verification.");
show_progress(0.100000, 0);
block_image_update(map_partition("vendor"), package_extract_file("vendor.transfer.list"), "vendor.new.dat", "vendor.patch.dat") ||
  abort("E2001: Failed to update vendor image.");

# Patch partition product

ui_print("Patching product image after verification.");
show_progress(0.100000, 0);
block_image_update(map_partition("product"), package_extract_file("product.transfer.list"), "product.new.dat", "product.patch.dat") ||
  abort("E2001: Failed to update product image.");

# --- End patching dynamic partitions ---

ui_print("Patching boot image...");
show_progress(0.100000, 10);
patch_partition(concat("EMMC:","/dev/block/platform/bootdevice/by-name/boot",":67108864:37b5d3c460942bf8dbf306a577f0383c823d9ba0"),
                concat("EMMC:","/dev/block/platform/bootdevice/by-name/boot",":67108864:139afdf0a3a106d0c55209b64da8f3b37e4eeb12"),
                package_extract_file("boot.img.p")) ||
    abort(concat(        "E3008: Failed to apply patch to ",concat("EMMC:","/dev/block/platform/bootdevice/by-name/boot",":67108864:139afdf0a3a106d0c55209b64da8f3b37e4eeb12")));
show_mtupdate_stage("/cache/recovery/last_mtupdate_stage");
ifelse (
less_than_int(get_mtupdate_stage("/cache/recovery/last_mtupdate_stage"), "1") ,
(
ui_print("start to update general image");
package_extract_file("dtbo.img", "/dev/block/platform/bootdevice/by-name/dtbo");
package_extract_file("logo.bin", "/dev/block/platform/bootdevice/by-name/logo");
package_extract_file("md1img.img", "/dev/block/platform/bootdevice/by-name/md1img");
package_extract_file("spmfw.img", "/dev/block/platform/bootdevice/by-name/spmfw");
set_mtupdate_stage("/cache/recovery/last_mtupdate_stage", "1");
),
ui_print("general images are already updated");
);
ifelse (
less_than_int(get_mtupdate_stage("/cache/recovery/last_mtupdate_stage"), "3") ,
(
if less_than_int(get_mtupdate_stage("/cache/recovery/last_mtupdate_stage"), "2") then

ui_print("start to update alt loader image");
package_extract_file("sspm.img", "/dev/block/platform/bootdevice/by-name/sspm_2");
package_extract_file("tee.img", "/dev/block/platform/bootdevice/by-name/tee2");
package_extract_file("scp.img", "/dev/block/platform/bootdevice/by-name/scp2");
package_extract_file("lk.img", "/dev/block/platform/bootdevice/by-name/lk2");
if get_storage_type() then 
 assert(package_extract_file("preloader_ufs.img", "/dev/block/mmcblk0boot1"));
else 
 assert(set_emmc_writable("/sys/block/mmcblk0boot1/force_ro"),
        package_extract_file("preloader_emmc.img", "/dev/block/mmcblk0boot1"));
endif;
set_mtupdate_stage("/cache/recovery/last_mtupdate_stage", "2");
endif;

switch_active("sspm_1", "sspm_2");
switch_active("tee1", "tee2");
switch_active("scp1", "scp2");
switch_active("lk", "lk2");
switch_active("preloader", "preloader2");
set_mtupdate_stage("/cache/recovery/last_mtupdate_stage", "3");
),
ui_print("alt loder images are already updated");
);
ifelse (
less_than_int(get_mtupdate_stage("/cache/recovery/last_mtupdate_stage"), "5") ,
(
if less_than_int(get_mtupdate_stage("/cache/recovery/last_mtupdate_stage"), "4") then

ui_print("start to update main loader image");
package_extract_file("sspm.img", "/dev/block/platform/bootdevice/by-name/sspm_1");
package_extract_file("tee.img", "/dev/block/platform/bootdevice/by-name/tee1");
package_extract_file("scp.img", "/dev/block/platform/bootdevice/by-name/scp1");
package_extract_file("lk.img", "/dev/block/platform/bootdevice/by-name/lk");
if get_storage_type() then 
 assert(package_extract_file("preloader_ufs.img", "/dev/block/mmcblk0boot0"));
else 
 assert(set_emmc_writable("/sys/block/mmcblk0boot0/force_ro"),
        package_extract_file("preloader_emmc.img", "/dev/block/mmcblk0boot0"));
endif;
set_mtupdate_stage("/cache/recovery/last_mtupdate_stage", "4");
endif;

switch_active("sspm_2", "sspm_1");
switch_active("tee2", "tee1");
switch_active("scp2", "scp1");
switch_active("lk2", "lk");
switch_active("preloader2", "preloader");
),
ui_print("main loader images are already updated");
);
delete("/cache/recovery/last_mtupdate_stage");
package_extract_file("vbmeta_system.img", "/dev/block/platform/bootdevice/by-name/vbmeta_system");
package_extract_file("vbmeta.img", "/dev/block/platform/bootdevice/by-name/vbmeta");
package_extract_file("vbmeta_vendor.img", "/dev/block/platform/bootdevice/by-name/vbmeta_vendor");
post_ota_action();
set_progress(1.000000);
