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:10/QP1A.190711.020/V12.0.1.0.QJOCNXM:user/release-keys");
ui_print("Target: Redmi/merlin/merlin:10/QP1A.190711.020/V12.0.3.0.QJOCNXM:user/release-keys");
ui_print("Verifying current system...");
getprop("ro.build.fingerprint") == "Redmi/merlin/merlin:10/QP1A.190711.020/V12.0.1.0.QJOCNXM:user/release-keys" ||
    getprop("ro.build.fingerprint") == "Redmi/merlin/merlin:10/QP1A.190711.020/V12.0.3.0.QJOCNXM:user/release-keys" ||
    abort("E3001: Package expects build fingerprint of Redmi/merlin/merlin:10/QP1A.190711.020/V12.0.1.0.QJOCNXM:user/release-keys or Redmi/merlin/merlin:10/QP1A.190711.020/V12.0.3.0.QJOCNXM: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:67108864:65dbc8fa07dd051dfc4c345c1dad1dfe15934e12",
                      "EMMC:/dev/block/platform/bootdevice/by-name/boot:67108864:3a3b994ff955fcb83aadb53558658dc846f81477") ||
    abort("E3005: \"EMMC:/dev/block/platform/bootdevice/by-name/boot:67108864:65dbc8fa07dd051dfc4c345c1dad1dfe15934e12\" or \"EMMC:/dev/block/platform/bootdevice/by-name/boot:67108864:3a3b994ff955fcb83aadb53558658dc846f81477\" has unexpected contents.");
apply_patch_space(135127040) || abort("E3006: Not enough free space on /cache to apply patches.");
patch_partition_check("EMMC:/dev/block/platform/bootdevice/by-name/md1img:57563440:afab34b09410546e22b947d0b8a63f8e2c536de7",
                      "EMMC:/dev/block/platform/bootdevice/by-name/md1img:57565728:6a612a0d0c7f5cd5f589f1bb498ad5f1a00f5d0d") ||
    abort("E3005: \"EMMC:/dev/block/platform/bootdevice/by-name/md1img:57563440:afab34b09410546e22b947d0b8a63f8e2c536de7\" or \"EMMC:/dev/block/platform/bootdevice/by-name/md1img:57565728:6a612a0d0c7f5cd5f589f1bb498ad5f1a00f5d0d\" has unexpected contents.");
apply_patch_space(57563440) || abort("E3006: Not enough free space on /cache to apply patches.");
show_progress(0.100000, 70);
if (range_sha1(map_partition("system"), "24,1,32770,32962,98306,98498,163842,164034,229378,229570,294914,295106,322356,327680,327696,334284,553221,553248,753678,753680,786433,786448,786599,788959,801385") == "e40252ce33f7a96eb897b96267cbeeec5223704c" || 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"), "24,1,32770,32962,98306,98498,163842,164034,229378,229570,294914,295106,322356,327680,327696,334284,553221,553248,753678,753680,786433,786448,786599,788959,801385") && 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"), "56,1,82,787,793,811,812,817,818,820,821,1307,1308,1310,1311,1447,1448,1459,1463,1467,1468,1684,1685,1764,1765,1835,1836,2021,2022,2100,2101,2180,2181,2260,2261,3147,3148,4637,4638,6312,6316,7388,7389,7810,32770,32819,98306,98355,163842,163891,196624,196631,200131,200744,203928,203983,203984") == "825d5f9525e8eb6fe9323d95ed54355aee9ace3f" || 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"), "56,1,82,787,793,811,812,817,818,820,821,1307,1308,1310,1311,1447,1448,1459,1463,1467,1468,1684,1685,1764,1765,1835,1836,2021,2022,2100,2101,2180,2181,2260,2261,3147,3148,4637,4638,6312,6316,7388,7389,7810,32770,32819,98306,98355,163842,163891,196624,196631,200131,200744,203928,203983,203984") && 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"), "126,1,36,569,575,592,593,595,596,711,715,719,720,15033,15034,30292,30293,31532,31533,32768,32770,32781,32796,34671,34675,34678,34679,34691,34692,34693,34694,34739,34740,34799,34802,35251,35252,35623,35624,37109,37110,37200,37202,37204,37205,37207,37208,37210,37211,37213,37214,37216,37217,37219,37220,37222,37223,37225,37226,37228,37229,37231,37232,37234,37235,37254,37255,37260,37261,37280,37281,37296,37297,37301,37302,37318,37319,37324,37325,37343,37344,37357,37358,37362,37363,37380,37381,37386,37387,37406,37407,37421,37422,37424,37425,37427,37428,37430,37431,37433,37434,37436,37437,37439,37440,37442,37443,37445,37446,37448,37449,37451,37453,38189,38193,38209,38279,38283,38284,38288,38292,38296,48414,48562,49335,49362,49363") == "4d54655eb798695579af773f9e0bf14e10ae95d5" || 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"), "126,1,36,569,575,592,593,595,596,711,715,719,720,15033,15034,30292,30293,31532,31533,32768,32770,32781,32796,34671,34675,34678,34679,34691,34692,34693,34694,34739,34740,34799,34802,35251,35252,35623,35624,37109,37110,37200,37202,37204,37205,37207,37208,37210,37211,37213,37214,37216,37217,37219,37220,37222,37223,37225,37226,37228,37229,37231,37232,37234,37235,37254,37255,37260,37261,37280,37281,37296,37297,37301,37302,37318,37319,37324,37325,37343,37344,37357,37358,37362,37363,37380,37381,37386,37387,37406,37407,37421,37422,37424,37425,37427,37428,37430,37431,37433,37434,37436,37437,37439,37440,37442,37443,37445,37446,37448,37449,37451,37453,38189,38193,38209,38279,38283,38284,38288,38292,38296,48414,48562,49335,49362,49363") && 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:67108864:65dbc8fa07dd051dfc4c345c1dad1dfe15934e12",
                "EMMC:/dev/block/platform/bootdevice/by-name/boot:67108864:3a3b994ff955fcb83aadb53558658dc846f81477",
                package_extract_file("boot.img.p")) ||
    abort("E3008: Failed to apply patch to EMMC:/dev/block/platform/bootdevice/by-name/boot:67108864:3a3b994ff955fcb83aadb53558658dc846f81477");
show_progress(0.600000, 600);

# --- Start patching dynamic partitions ---


# 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 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.");

# 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.");
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.");

# --- 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:57563440:afab34b09410546e22b947d0b8a63f8e2c536de7",
                "EMMC:/dev/block/platform/bootdevice/by-name/md1img:57565728:6a612a0d0c7f5cd5f589f1bb498ad5f1a00f5d0d",
                package_extract_file("patch/md1img.img.p")) ||
    abort("E3008: Failed to apply patch to EMMC:/dev/block/platform/bootdevice/by-name/md1img:57565728:6a612a0d0c7f5cd5f589f1bb498ad5f1a00f5d0d");
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();
