diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/Common.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/Common.kt
index f333ce0ee4..8f63bf469c 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/Common.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/Common.kt
@@ -40,6 +40,12 @@ value class GiftId(
     val string: String
 )
 
+@Serializable
+@JvmInline
+value class PreparedMessageId(
+    val string: String
+)
+
 val usernameRegex = Regex("@[\\w\\d_]+")
 
 val degreesLimit = 1 .. 360
diff --git a/tgbotapi.webapps/src/jsMain/kotlin/dev/inmo/tgbotapi/webapps/HomeScreenStatus.kt b/tgbotapi.webapps/src/jsMain/kotlin/dev/inmo/tgbotapi/webapps/HomeScreenStatus.kt
new file mode 100644
index 0000000000..e39ca9f371
--- /dev/null
+++ b/tgbotapi.webapps/src/jsMain/kotlin/dev/inmo/tgbotapi/webapps/HomeScreenStatus.kt
@@ -0,0 +1,8 @@
+package dev.inmo.tgbotapi.webapps
+
+enum class HomeScreenStatus(val value: String) {
+    Unsupported("unsupported"),
+    Unknown("unknown"),
+    Added("added"),
+    Missed("missed"),
+}
diff --git a/tgbotapi.webapps/src/jsMain/kotlin/dev/inmo/tgbotapi/webapps/WebApp.kt b/tgbotapi.webapps/src/jsMain/kotlin/dev/inmo/tgbotapi/webapps/WebApp.kt
index c782c821cd..1f8ad2407c 100644
--- a/tgbotapi.webapps/src/jsMain/kotlin/dev/inmo/tgbotapi/webapps/WebApp.kt
+++ b/tgbotapi.webapps/src/jsMain/kotlin/dev/inmo/tgbotapi/webapps/WebApp.kt
@@ -1,5 +1,7 @@
 package dev.inmo.tgbotapi.webapps
 
+import dev.inmo.tgbotapi.types.MessageId
+import dev.inmo.tgbotapi.types.PreparedMessageId
 import dev.inmo.tgbotapi.utils.TelegramAPIUrlsKeeper
 import dev.inmo.tgbotapi.webapps.biometric.BiometricManager
 import dev.inmo.tgbotapi.webapps.cloud.CloudStorage
@@ -13,6 +15,8 @@ external class WebApp {
 
     val platform: String
 
+    val isActive: Boolean
+
     val initData: String
     val initDataUnsafe: WebAppInitData
 
@@ -52,6 +56,19 @@ external class WebApp {
     fun closeScanQrPopup()
     fun readTextFromClipboard(callback: TextReceivedCallback? = definedExternally)
 
+    val isFullscreen: Boolean
+    fun requestFullscreen()
+    fun exitFullscreen()
+
+    val isOrientationLocked: Boolean
+    fun lockOrientation()
+    fun unlockOrientation()
+
+    fun addToHomeScreen()
+    fun checkHomeScreenStatus(callback: (HomeScreenStatus) -> Unit = definedExternally)
+
+    fun shareMessage(messageId: PreparedMessageId, callback: (Boolean) -> Unit = definedExternally)
+
     @JsName("MainButton")
     val mainButton: BottomButton
     @JsName("SecondaryButton")
diff --git a/tgbotapi.webapps/src/jsMain/kotlin/dev/inmo/tgbotapi/webapps/WebAppInitData.kt b/tgbotapi.webapps/src/jsMain/kotlin/dev/inmo/tgbotapi/webapps/WebAppInitData.kt
index 78c7528233..960a4360e5 100644
--- a/tgbotapi.webapps/src/jsMain/kotlin/dev/inmo/tgbotapi/webapps/WebAppInitData.kt
+++ b/tgbotapi.webapps/src/jsMain/kotlin/dev/inmo/tgbotapi/webapps/WebAppInitData.kt
@@ -1,6 +1,7 @@
 package dev.inmo.tgbotapi.webapps
 
 import dev.inmo.tgbotapi.types.*
+import dev.inmo.tgbotapi.types.chat.ChatType
 
 external interface WebAppInitData {
     @JsName("query_id")
@@ -9,6 +10,14 @@ external interface WebAppInitData {
     val user: WebAppUser?
     val receiver: WebAppUser?
 
+    val chat: WebAppChat
+
+    @JsName("chat_type")
+    val chatType: ChatType?
+
+    @JsName("chat_instance")
+    val chatInstance: String?
+
     @JsName("start_param")
     val startParam: String?
 
@@ -16,9 +25,9 @@ external interface WebAppInitData {
     val authDate: MilliSeconds
 
     @JsName("can_send_after")
-    val canSendAfter: MilliSeconds
-
-    val chat: WebAppChat
+    val canSendAfter: MilliSeconds?
 
     val hash: String
+
+    val signature: String
 }