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/V12.5.5.0.RJOINXM:user/release-keys");
ui_print("Target: Redmi/merlin/merlin:11/RP1A.200720.011/V12.5.6.0.RJOINXM:user/release-keys");
ui_print("Verifying current system...");
getprop("ro.build.fingerprint") == "Redmi/merlin/merlin:11/RP1A.200720.011/V12.5.5.0.RJOINXM:user/release-keys" ||
    getprop("ro.build.fingerprint") == "Redmi/merlin/merlin:11/RP1A.200720.011/V12.5.6.0.RJOINXM:user/release-keys" ||
    abort("E3001: Package expects build fingerprint of Redmi/merlin/merlin:11/RP1A.200720.011/V12.5.5.0.RJOINXM:user/release-keys or Redmi/merlin/merlin:11/RP1A.200720.011/V12.5.6.0.RJOINXM:user/release-keys; this device has " + getprop("ro.build.fingerprint") + ".");
patch_partition_check(concat("EMMC:","/dev/block/platform/bootdevice/by-name/boot",":67108864:ce52b0824a0313826f1162924975eb89f7b4254e"),
                      concat("EMMC:","/dev/block/platform/bootdevice/by-name/boot",":67108864:1d31e3a163f964cb953c822c5582cd4cac85a462")) ||
    abort(concat("E3005: \"",concat("EMMC:","/dev/block/platform/bootdevice/by-name/boot",":67108864:ce52b0824a0313826f1162924975eb89f7b4254e"),"\" or \"",concat("EMMC:","/dev/block/platform/bootdevice/by-name/boot",":67108864:1d31e3a163f964cb953c822c5582cd4cac85a462"),"\" has unexpected contents."));
apply_patch_space(92434432) || abort("E3006: Not enough free space on /cache to apply patches.");
if (range_sha1(map_partition("system"), "18,1,32770,32964,98306,98500,163842,164036,229378,229572,294914,295108,786445,786448,794821,797232,809864,810033,810034") == "7e2b4d9abbcaf4eafb4a442a4983fd29192dab61" || 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"), "18,1,32770,32964,98306,98500,163842,164036,229378,229572,294914,295108,786445,786448,794821,797232,809864,810033,810034") && 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"), "84,1,76,82,83,86,87,90,91,94,95,610,611,614,615,618,619,622,623,626,627,788,789,792,793,1009,1010,1089,1090,1160,1161,1344,1345,1423,1424,1503,1504,1583,1584,2487,2488,2607,2615,3900,3901,4982,4983,6095,6100,6101,6103,6104,6106,24190,24239,32768,32770,32810,32857,41452,41811,42220,42221,42537,42538,42862,42863,43177,43178,45411,45420,49674,49830,51514,51515,53687,98306,98346,163842,163882,164323,164835,167450,167499,167500") == "c69a0d46d6d04a9e31db15818d4d06135051f3e5" || 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"), "84,1,76,82,83,86,87,90,91,94,95,610,611,614,615,618,619,622,623,626,627,788,789,792,793,1009,1010,1089,1090,1160,1161,1344,1345,1423,1424,1503,1504,1583,1584,2487,2488,2607,2615,3900,3901,4982,4983,6095,6100,6101,6103,6104,6106,24190,24239,32768,32770,32810,32857,41452,41811,42220,42221,42537,42538,42862,42863,43177,43178,45411,45420,49674,49830,51514,51515,53687,98306,98346,163842,163882,164323,164835,167450,167499,167500") && 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"), "170,1,82,7323,7327,10126,10129,12939,12940,17117,17121,21612,21613,30026,30027,32768,32770,32836,32842,40028,40029,40704,40708,41675,41676,42038,42042,42561,42562,42574,42578,42582,42583,44423,44427,44481,45864,55615,55616,63841,63842,65536,65542,73689,73690,84769,84770,84777,84778,92304,92305,93542,93546,94559,94560,98304,98306,98372,98378,112042,112043,131072,131078,133913,133914,136789,136790,144091,144092,155799,155800,155807,155808,155814,155815,162434,162435,162447,162451,162454,162455,162456,162457,162458,162459,162470,162471,162474,162476,162477,162478,162479,162480,162491,162494,162943,162944,163315,163316,163840,163842,163908,163914,164875,164876,164966,164968,164971,164972,164975,164976,164979,164980,164983,164984,164987,164988,164991,164992,164995,164996,165002,165003,165009,165010,165016,165017,165023,165024,165030,165031,165060,165061,165082,165083,165863,165865,185685,185686,196548,196550,196608,196645,196892,196894,197282,197284,198680,198682,211286,211287,213526,213528,215117,215119,225976,225977,229376,229378,229444,229470,256960,256961,260826,260829,262144,262149,271434,275738,275806,275807") == "4beec2b68700e34859f55f64340e56de7dd1a64b" || 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"), "170,1,82,7323,7327,10126,10129,12939,12940,17117,17121,21612,21613,30026,30027,32768,32770,32836,32842,40028,40029,40704,40708,41675,41676,42038,42042,42561,42562,42574,42578,42582,42583,44423,44427,44481,45864,55615,55616,63841,63842,65536,65542,73689,73690,84769,84770,84777,84778,92304,92305,93542,93546,94559,94560,98304,98306,98372,98378,112042,112043,131072,131078,133913,133914,136789,136790,144091,144092,155799,155800,155807,155808,155814,155815,162434,162435,162447,162451,162454,162455,162456,162457,162458,162459,162470,162471,162474,162476,162477,162478,162479,162480,162491,162494,162943,162944,163315,163316,163840,163842,163908,163914,164875,164876,164966,164968,164971,164972,164975,164976,164979,164980,164983,164984,164987,164988,164991,164992,164995,164996,165002,165003,165009,165010,165016,165017,165023,165024,165030,165031,165060,165061,165082,165083,165863,165865,185685,185686,196548,196550,196608,196645,196892,196894,197282,197284,198680,198682,211286,211287,213526,213528,215117,215119,225976,225977,229376,229378,229444,229470,256960,256961,260826,260829,262144,262149,271434,275738,275806,275807") && 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 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.");

# Update dynamic partition metadata

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

# 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:ce52b0824a0313826f1162924975eb89f7b4254e"),
                concat("EMMC:","/dev/block/platform/bootdevice/by-name/boot",":67108864:1d31e3a163f964cb953c822c5582cd4cac85a462"),
                package_extract_file("boot.img.p")) ||
    abort(concat(        "E3008: Failed to apply patch to ",concat("EMMC:","/dev/block/platform/bootdevice/by-name/boot",":67108864:1d31e3a163f964cb953c822c5582cd4cac85a462")));
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);
