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_eea/merlin:10/QP1A.190711.020/V12.0.4.0.QJOEUXM:user/release-keys");
ui_print("Target: Redmi/merlin_eea/merlin:10/QP1A.190711.020/V12.0.5.0.QJOEUXM:user/release-keys");
ui_print("Verifying current system...");
getprop("ro.build.fingerprint") == "Redmi/merlin_eea/merlin:10/QP1A.190711.020/V12.0.4.0.QJOEUXM:user/release-keys" ||
    getprop("ro.build.fingerprint") == "Redmi/merlin_eea/merlin:10/QP1A.190711.020/V12.0.5.0.QJOEUXM:user/release-keys" ||
    abort("E3001: Package expects build fingerprint of Redmi/merlin_eea/merlin:10/QP1A.190711.020/V12.0.4.0.QJOEUXM:user/release-keys or Redmi/merlin_eea/merlin:10/QP1A.190711.020/V12.0.5.0.QJOEUXM:user/release-keys; this device has " + getprop("ro.build.fingerprint") + ".");
show_progress(0.100000, 10);
patch_partition_check("EMMC:/dev/block/platform/bootdevice/by-name/boot:67108864:a7803adc07d927fc5c258fdfa5c7d4b960988919",
                      "EMMC:/dev/block/platform/bootdevice/by-name/boot:67108864:f92e4bedc04a1a508eaccd4b9aa4244332f2cd29") ||
    abort("E3005: \"EMMC:/dev/block/platform/bootdevice/by-name/boot:67108864:a7803adc07d927fc5c258fdfa5c7d4b960988919\" or \"EMMC:/dev/block/platform/bootdevice/by-name/boot:67108864:f92e4bedc04a1a508eaccd4b9aa4244332f2cd29\" has unexpected contents.");
apply_patch_space(67108864) || abort("E3006: Not enough free space on /cache to apply patches.");
patch_partition_check("EMMC:/dev/block/platform/bootdevice/by-name/md1img:58123424:1bd27a203b18bf87002e9ca2bd0270dce3d78ef1",
                      "EMMC:/dev/block/platform/bootdevice/by-name/md1img:58127952:991453256142627dec2a23884b89866126c92ff0") ||
    abort("E3005: \"EMMC:/dev/block/platform/bootdevice/by-name/md1img:58123424:1bd27a203b18bf87002e9ca2bd0270dce3d78ef1\" or \"EMMC:/dev/block/platform/bootdevice/by-name/md1img:58127952:991453256142627dec2a23884b89866126c92ff0\" has unexpected contents.");
apply_patch_space(58123424) || abort("E3006: Not enough free space on /cache to apply patches.");
show_progress(0.100000, 70);
if (range_sha1(map_partition("system"), "22,1,32770,32924,57584,58271,58273,58297,98306,98460,163842,163996,229378,229532,294914,295068,622605,622612,632674,634599,644656,644793,644794") == "09fc6ff43e7b5f37ca16c28bb61acb512fa8f56b" || 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"), "22,1,32770,32924,57584,58271,58273,58297,98306,98460,163842,163996,229378,229532,294914,295068,622605,622612,632674,634599,644656,644793,644794") && 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"), "62,1,76,813,819,837,838,843,844,846,847,1361,1362,1364,1365,1526,1527,1538,1542,1546,1547,1763,1764,1843,1844,1914,1915,2100,2101,2179,2180,2259,2260,2339,2340,3125,3130,3226,3227,4716,4717,7464,7465,7673,7840,7886,30894,31014,31015,32601,32770,32810,98306,98346,163842,163882,163904,163908,164530,165047,167666,167713,167714") == "0fd4c3b031b7c0c59d99bed1fc323eb97d833fda" || 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"), "62,1,76,813,819,837,838,843,844,846,847,1361,1362,1364,1365,1526,1527,1538,1542,1546,1547,1763,1764,1843,1844,1914,1915,2100,2101,2179,2180,2259,2260,2339,2340,3125,3130,3226,3227,4716,4717,7464,7465,7673,7840,7886,30894,31014,31015,32601,32770,32810,98306,98346,163842,163882,163904,163908,164530,165047,167666,167713,167714") && 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"), "192,1,85,5375,5376,9712,9716,11857,11860,14012,14013,14558,14564,14581,14582,20821,20822,23229,23230,23594,23598,24105,24106,24118,24122,24126,24127,25967,25971,27408,27409,31475,31479,32768,32770,32838,32845,35757,35758,42651,42652,43053,43054,50219,50220,58270,58271,65536,65543,70162,70163,70822,70823,78301,78302,84409,84410,84416,84417,84545,84549,84553,84554,98304,98306,98374,98381,99196,99197,114878,114879,116290,116291,122674,122675,129916,129917,131072,131079,133034,133038,133047,133048,133049,133050,133065,133066,133067,133068,133071,133073,133074,133075,133114,133118,133122,133124,133129,133132,133136,133138,133143,133144,133189,133190,133249,133252,133701,133702,134073,134074,135559,135560,135650,135652,135654,135655,135657,135658,135660,135661,135663,135664,135666,135667,135669,135670,135672,135673,135677,135678,135683,135684,135688,135689,135705,135706,135725,135726,135731,135732,135751,135752,136197,136199,143075,143077,159483,159484,163840,163842,163910,163947,166169,166171,168930,168934,168980,168981,169361,169365,169375,169376,174672,174673,178518,178519,178690,178694,178741,178743,178884,178886,180142,180144,181222,181224,181233,181301,190323,190325,190339,229378,229446,229452,229453,262145,262151,277731,278565,282982,283051,283052") == "f3371a33af8b3800fbced14229223e874a532b4c" || 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"), "192,1,85,5375,5376,9712,9716,11857,11860,14012,14013,14558,14564,14581,14582,20821,20822,23229,23230,23594,23598,24105,24106,24118,24122,24126,24127,25967,25971,27408,27409,31475,31479,32768,32770,32838,32845,35757,35758,42651,42652,43053,43054,50219,50220,58270,58271,65536,65543,70162,70163,70822,70823,78301,78302,84409,84410,84416,84417,84545,84549,84553,84554,98304,98306,98374,98381,99196,99197,114878,114879,116290,116291,122674,122675,129916,129917,131072,131079,133034,133038,133047,133048,133049,133050,133065,133066,133067,133068,133071,133073,133074,133075,133114,133118,133122,133124,133129,133132,133136,133138,133143,133144,133189,133190,133249,133252,133701,133702,134073,134074,135559,135560,135650,135652,135654,135655,135657,135658,135660,135661,135663,135664,135666,135667,135669,135670,135672,135673,135677,135678,135683,135684,135688,135689,135705,135706,135725,135726,135731,135732,135751,135752,136197,136199,143075,143077,159483,159484,163840,163842,163910,163947,166169,166171,168930,168934,168980,168981,169361,169365,169375,169376,174672,174673,178518,178519,178690,178694,178741,178743,178884,178886,180142,180144,181222,181224,181233,181301,190323,190325,190339,229378,229446,229452,229453,262145,262151,277731,278565,282982,283051,283052") && 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 ----

ui_print("Patching boot image...");
show_progress(0.100000, 10);
patch_partition("EMMC:/dev/block/platform/bootdevice/by-name/boot:67108864:a7803adc07d927fc5c258fdfa5c7d4b960988919",
                "EMMC:/dev/block/platform/bootdevice/by-name/boot:67108864:f92e4bedc04a1a508eaccd4b9aa4244332f2cd29",
                package_extract_file("boot.img.p")) ||
    abort("E3008: Failed to apply patch to EMMC:/dev/block/platform/bootdevice/by-name/boot:67108864:f92e4bedc04a1a508eaccd4b9aa4244332f2cd29");
show_progress(0.600000, 600);

# --- Start patching dynamic partitions ---


# Update dynamic partition metadata

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

# Patch partition product

ui_print("Patching product image after verification.");
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.");

# Patch partition vendor

ui_print("Patching vendor image after verification.");
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 system

ui_print("Patching system image after verification.");
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.");

# --- End patching dynamic partitions ---

show_progress(0.100000, 2);
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("logo.bin", "/dev/block/platform/bootdevice/by-name/logo");
package_extract_file("dtbo.img", "/dev/block/platform/bootdevice/by-name/dtbo");
package_extract_file("exaid.img", "/dev/block/platform/bootdevice/by-name/exaid");
ui_print("Patching md1img image...");
show_progress(0.100000, 10);
patch_partition("EMMC:/dev/block/platform/bootdevice/by-name/md1img:58123424:1bd27a203b18bf87002e9ca2bd0270dce3d78ef1",
                "EMMC:/dev/block/platform/bootdevice/by-name/md1img:58127952:991453256142627dec2a23884b89866126c92ff0",
                package_extract_file("patch/md1img.img.p")) ||
    abort("E3008: Failed to apply patch to EMMC:/dev/block/platform/bootdevice/by-name/md1img:58127952:991453256142627dec2a23884b89866126c92ff0");
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("scp.img", "/dev/block/platform/bootdevice/by-name/scp2");
package_extract_file("lk.img", "/dev/block/platform/bootdevice/by-name/lk2");
package_extract_file("tee.img", "/dev/block/platform/bootdevice/by-name/tee2");
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("scp1", "scp2");
switch_active("lk", "lk2");
switch_active("tee1", "tee2");
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("scp.img", "/dev/block/platform/bootdevice/by-name/scp1");
package_extract_file("lk.img", "/dev/block/platform/bootdevice/by-name/lk");
package_extract_file("tee.img", "/dev/block/platform/bootdevice/by-name/tee1");
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("scp2", "scp1");
switch_active("lk2", "lk");
switch_active("tee2", "tee1");
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();
