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/merlin:11/RP1A.200720.011/V12.5.4.0.RJOCNXM:user/release-keys");
ui_print("Target: Redmi/merlin/merlin:11/RP1A.200720.011/V12.5.7.0.RJOCNXM:user/release-keys");
ui_print("Verifying current system...");
getprop("ro.build.fingerprint") == "Redmi/merlin/merlin:11/RP1A.200720.011/V12.5.4.0.RJOCNXM:user/release-keys" ||
    getprop("ro.build.fingerprint") == "Redmi/merlin/merlin:11/RP1A.200720.011/V12.5.7.0.RJOCNXM:user/release-keys" ||
    abort("E3001: Package expects build fingerprint of Redmi/merlin/merlin:11/RP1A.200720.011/V12.5.4.0.RJOCNXM:user/release-keys or Redmi/merlin/merlin:11/RP1A.200720.011/V12.5.7.0.RJOCNXM:user/release-keys; this device has " + getprop("ro.build.fingerprint") + ".");
patch_partition_check(concat("EMMC:","/dev/block/platform/bootdevice/by-name/boot",":67108864:7c6141ffee9c1976baa13f54734c13d497a15d87"),
                      concat("EMMC:","/dev/block/platform/bootdevice/by-name/boot",":67108864:b32f2c0cc3636920c10606dd8d09edb79f169f53")) ||
    abort(concat("E3005: \"",concat("EMMC:","/dev/block/platform/bootdevice/by-name/boot",":67108864:7c6141ffee9c1976baa13f54734c13d497a15d87"),"\" or \"",concat("EMMC:","/dev/block/platform/bootdevice/by-name/boot",":67108864:b32f2c0cc3636920c10606dd8d09edb79f169f53"),"\" has unexpected contents."));
apply_patch_space(84262912) || abort("E3006: Not enough free space on /cache to apply patches.");
if (range_sha1(map_partition("system"), "24,1,32770,33030,98306,98566,163842,164102,229378,229638,294914,295174,768594,768598,819202,819462,884738,884998,1048587,1048588,1065204,1068433,1085363,1085582,1085583") == "d07fdfcbdcdd75ca546f7a15a4ad09f6a91e287c" || 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"), "24,1,32770,33030,98306,98566,163842,164102,229378,229638,294914,295174,768594,768598,819202,819462,884738,884998,1048587,1048588,1065204,1068433,1085363,1085582,1085583") && 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"), "30,1,32770,32820,85235,85419,85423,85753,86703,86727,89320,89330,89536,89610,90450,90573,98306,98356,138211,138717,163842,163892,165084,165194,196629,196631,204406,205039,208290,208346,208347") == "47d29a8d1e3ca7464023761ecf1dc730fab2422b" || 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"), "30,1,32770,32820,85235,85419,85423,85753,86703,86727,89320,89330,89536,89610,90450,90573,98306,98356,138211,138717,163842,163892,165084,165194,196629,196631,204406,205039,208290,208346,208347") && 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"), "8,1,32770,32784,59536,59717,60666,60694,60695") == "b3e16b4569d5ea2202655df8bc5ae837b15c3184" || 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"), "8,1,32770,32784,59536,59717,60666,60694,60695") && 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 ---


# 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.");

# 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 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",":67108864:7c6141ffee9c1976baa13f54734c13d497a15d87"),
                concat("EMMC:","/dev/block/platform/bootdevice/by-name/boot",":67108864:b32f2c0cc3636920c10606dd8d09edb79f169f53"),
                package_extract_file("boot.img.p")) ||
    abort(concat(        "E3008: Failed to apply patch to ",concat("EMMC:","/dev/block/platform/bootdevice/by-name/boot",":67108864:b32f2c0cc3636920c10606dd8d09edb79f169f53")));
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);
