diff --git a/applications/system/js_app/js_modules.h b/applications/system/js_app/js_modules.h
index 1dfd59521..656a7b7b6 100644
--- a/applications/system/js_app/js_modules.h
+++ b/applications/system/js_app/js_modules.h
@@ -9,9 +9,10 @@
 #define PLUGIN_APP_ID      "js"
 #define PLUGIN_API_VERSION 1
 
-#define JS_SDK_VENDOR "flipperdevices"
-#define JS_SDK_MAJOR  0
-#define JS_SDK_MINOR  1
+#define JS_SDK_VENDOR_FIRMWARE "unleashed"
+#define JS_SDK_VENDOR          "flipperdevices"
+#define JS_SDK_MAJOR           0
+#define JS_SDK_MINOR           1
 
 /**
  * @brief Returns the foreign pointer in `obj["_"]`
diff --git a/applications/system/js_app/modules/js_flipper.c b/applications/system/js_app/modules/js_flipper.c
index eeaa2c8a0..228cd0661 100644
--- a/applications/system/js_app/modules/js_flipper.c
+++ b/applications/system/js_app/modules/js_flipper.c
@@ -37,7 +37,7 @@ void* js_flipper_create(struct mjs* mjs, mjs_val_t* object, JsModules* modules)
         JS_FIELD("getModel", MJS_MK_FN(js_flipper_get_model));
         JS_FIELD("getName", MJS_MK_FN(js_flipper_get_name));
         JS_FIELD("getBatteryCharge", MJS_MK_FN(js_flipper_get_battery));
-        JS_FIELD("firmwareVendor", mjs_mk_string(mjs, JS_SDK_VENDOR, ~0, false));
+        JS_FIELD("firmwareVendor", mjs_mk_string(mjs, JS_SDK_VENDOR_FIRMWARE, ~0, false));
         JS_FIELD("jsSdkVersion", sdk_vsn);
     }
 
diff --git a/applications/system/js_app/types/i2c/index.d.ts b/applications/system/js_app/packages/fz-sdk/i2c/index.d.ts
similarity index 100%
rename from applications/system/js_app/types/i2c/index.d.ts
rename to applications/system/js_app/packages/fz-sdk/i2c/index.d.ts
diff --git a/applications/system/js_app/types/spi/index.d.ts b/applications/system/js_app/packages/fz-sdk/spi/index.d.ts
similarity index 100%
rename from applications/system/js_app/types/spi/index.d.ts
rename to applications/system/js_app/packages/fz-sdk/spi/index.d.ts
diff --git a/lib/subghz/protocols/alutech_at_4n.c b/lib/subghz/protocols/alutech_at_4n.c
index b6fb8d290..091a726ed 100644
--- a/lib/subghz/protocols/alutech_at_4n.c
+++ b/lib/subghz/protocols/alutech_at_4n.c
@@ -308,16 +308,22 @@ bool subghz_protocol_alutech_at_4n_create_data(
     instance->generic.serial = serial;
     instance->generic.cnt = cnt;
     instance->generic.data_count_bit = 72;
-    bool res = subghz_protocol_alutech_at_4n_gen_data(instance, btn);
-    if(res) {
+    if(subghz_protocol_alutech_at_4n_gen_data(instance, btn)) {
         if((subghz_block_generic_serialize(&instance->generic, flipper_format, preset) !=
-            SubGhzProtocolStatusOk) ||
-           !flipper_format_write_uint32(flipper_format, "CRC", &instance->crc, 1)) {
+            SubGhzProtocolStatusOk)) {
+            FURI_LOG_E(TAG, "Serialize error");
+            return false;
+        }
+        if(!flipper_format_rewind(flipper_format)) {
+            FURI_LOG_E(TAG, "Rewind error");
+            return false;
+        }
+        if(!flipper_format_insert_or_update_uint32(flipper_format, "CRC", &instance->crc, 1)) {
             FURI_LOG_E(TAG, "Unable to add CRC");
-            res = false;
+            return false;
         }
     }
-    return res;
+    return true;
 }
 
 /**
@@ -667,8 +673,12 @@ SubGhzProtocolStatus subghz_protocol_decoder_alutech_at_4n_serialize(
     SubGhzProtocolDecoderAlutech_at_4n* instance = context;
     SubGhzProtocolStatus res =
         subghz_block_generic_serialize(&instance->generic, flipper_format, preset);
+    if(!flipper_format_rewind(flipper_format)) {
+        FURI_LOG_E(TAG, "Rewind error");
+        res = SubGhzProtocolStatusErrorParserOthers;
+    }
     if((res == SubGhzProtocolStatusOk) &&
-       !flipper_format_write_uint32(flipper_format, "CRC", &instance->crc, 1)) {
+       !flipper_format_insert_or_update_uint32(flipper_format, "CRC", &instance->crc, 1)) {
         FURI_LOG_E(TAG, "Unable to add CRC");
         res = SubGhzProtocolStatusErrorParserOthers;
     }
diff --git a/lib/subghz/protocols/keeloq.c b/lib/subghz/protocols/keeloq.c
index b1dbb6f86..4d458bc10 100644
--- a/lib/subghz/protocols/keeloq.c
+++ b/lib/subghz/protocols/keeloq.c
@@ -357,12 +357,12 @@ bool subghz_protocol_keeloq_create_data(
     instance->generic.cnt = cnt;
     instance->manufacture_name = manufacture_name;
     instance->generic.data_count_bit = 64;
-    bool res = subghz_protocol_keeloq_gen_data(instance, btn, false);
-    if(res) {
-        return SubGhzProtocolStatusOk ==
-               subghz_block_generic_serialize(&instance->generic, flipper_format, preset);
+    if(subghz_protocol_keeloq_gen_data(instance, btn, false)) {
+        return (
+            subghz_block_generic_serialize(&instance->generic, flipper_format, preset) ==
+            SubGhzProtocolStatusOk);
     }
-    return res;
+    return false;
 }
 
 bool subghz_protocol_keeloq_bft_create_data(
@@ -382,13 +382,13 @@ bool subghz_protocol_keeloq_bft_create_data(
     instance->generic.seed = seed;
     instance->manufacture_name = manufacture_name;
     instance->generic.data_count_bit = 64;
-    // roguuemaster don't steal.!!!!
-    bool res = subghz_protocol_keeloq_gen_data(instance, btn, false);
-    if(res) {
-        return SubGhzProtocolStatusOk ==
-               subghz_block_generic_serialize(&instance->generic, flipper_format, preset);
+    // hehehehe
+    if(subghz_protocol_keeloq_gen_data(instance, btn, false)) {
+        return (
+            subghz_block_generic_serialize(&instance->generic, flipper_format, preset) ==
+            SubGhzProtocolStatusOk);
     }
-    return res;
+    return false;
 }
 
 /**
diff --git a/lib/subghz/protocols/kinggates_stylo_4k.c b/lib/subghz/protocols/kinggates_stylo_4k.c
index fc7ca01fd..7e7488f00 100644
--- a/lib/subghz/protocols/kinggates_stylo_4k.c
+++ b/lib/subghz/protocols/kinggates_stylo_4k.c
@@ -309,7 +309,7 @@ SubGhzProtocolStatus subghz_protocol_encoder_kinggates_stylo_4k_deserialize(
             key_data[sizeof(uint64_t) - i - 1] = (instance->generic.data_2 >> i * 8) & 0xFF;
         }
         if(!flipper_format_update_hex(flipper_format, "Data", key_data, sizeof(uint64_t))) {
-            FURI_LOG_E(TAG, "Unable to add Key");
+            FURI_LOG_E(TAG, "Unable to update Data");
             break;
         }
 
@@ -524,8 +524,13 @@ SubGhzProtocolStatus subghz_protocol_decoder_kinggates_stylo_4k_serialize(
         key_data[sizeof(uint64_t) - i - 1] = (instance->generic.data_2 >> (i * 8)) & 0xFF;
     }
 
+    if(!flipper_format_rewind(flipper_format)) {
+        FURI_LOG_E(TAG, "Rewind error");
+        ret = SubGhzProtocolStatusErrorParserOthers;
+    }
+
     if((ret == SubGhzProtocolStatusOk) &&
-       !flipper_format_write_hex(flipper_format, "Data", key_data, sizeof(uint64_t))) {
+       !flipper_format_insert_or_update_hex(flipper_format, "Data", key_data, sizeof(uint64_t))) {
         FURI_LOG_E(TAG, "Unable to add Data");
         ret = SubGhzProtocolStatusErrorParserOthers;
     }
diff --git a/lib/subghz/protocols/nice_flor_s.c b/lib/subghz/protocols/nice_flor_s.c
index 19273e18e..1e5c14c6e 100644
--- a/lib/subghz/protocols/nice_flor_s.c
+++ b/lib/subghz/protocols/nice_flor_s.c
@@ -271,7 +271,7 @@ SubGhzProtocolStatus
             key_data[sizeof(uint64_t) - i - 1] = (instance->generic.data >> i * 8) & 0xFF;
         }
         if(!flipper_format_update_hex(flipper_format, "Key", key_data, sizeof(uint64_t))) {
-            FURI_LOG_E(TAG, "Unable to add Key");
+            FURI_LOG_E(TAG, "Unable to update Key");
             break;
         }
 
@@ -282,7 +282,7 @@ SubGhzProtocolStatus
             }
             uint32_t temp = (instance->generic.data_2 >> 4) & 0xFFFFF;
             if(!flipper_format_update_uint32(flipper_format, "Data", &temp, 1)) {
-                FURI_LOG_E(TAG, "Unable to add Data");
+                FURI_LOG_E(TAG, "Unable to update Data");
             }
         }
 
@@ -711,8 +711,13 @@ SubGhzProtocolStatus subghz_protocol_decoder_nice_flor_s_serialize(
     SubGhzProtocolStatus ret =
         subghz_block_generic_serialize(&instance->generic, flipper_format, preset);
     if(instance->generic.data_count_bit == NICE_ONE_COUNT_BIT) {
+        if(!flipper_format_rewind(flipper_format)) {
+            FURI_LOG_E(TAG, "Rewind error");
+            ret = SubGhzProtocolStatusErrorParserOthers;
+        }
         if((ret == SubGhzProtocolStatusOk) &&
-           !flipper_format_write_uint32(flipper_format, "Data", (uint32_t*)&instance->data, 1)) {
+           !flipper_format_insert_or_update_uint32(
+               flipper_format, "Data", (uint32_t*)&instance->data, 1)) {
             FURI_LOG_E(TAG, "Unable to add Data");
             ret = SubGhzProtocolStatusErrorParserOthers;
         }