diff --git a/CHANGELOG.md b/CHANGELOG.md
index ececa0b868..7390ed2954 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # TelegramBotAPI changelog
 
+## 0.38.20
+
+* `BehaviourBuilder FSM`:
+    * Hotfixes
+* `WebApps`:
+    * New extension `TelegramBot#answerWebAppQuery`
+    * New function `handleResult`
+
 ## 0.38.19
 
 * `BehaviourBuilder`:
diff --git a/gradle.properties b/gradle.properties
index 0401f4f412..f9b76a73b9 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -20,6 +20,6 @@ javax_activation_version=1.1.1
 dokka_version=1.6.10
 
 library_group=dev.inmo
-library_version=0.38.19
+library_version=0.38.20
 
 github_release_plugin_version=2.3.7
diff --git a/tgbotapi.behaviour_builder.fsm/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/behaviour_builder/BehaviourContextWithFSM.kt b/tgbotapi.behaviour_builder.fsm/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/behaviour_builder/BehaviourContextWithFSM.kt
index 6212a4134a..2bb6b3ea89 100644
--- a/tgbotapi.behaviour_builder.fsm/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/behaviour_builder/BehaviourContextWithFSM.kt
+++ b/tgbotapi.behaviour_builder.fsm/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/behaviour_builder/BehaviourContextWithFSM.kt
@@ -28,7 +28,9 @@ interface BehaviourContextWithFSM<T : State> : BehaviourContext, StatesMachine<T
         handlers: List<BehaviourWithFSMStateHandlerHolder<*, T>>
     ): T? {
         return handlers.firstOrNull { it.checkHandleable(state) } ?.run {
-            handleState(contextUpdatesFlow, state)
+            doInSubContext(updatesUpstreamFlow = contextUpdatesFlow) {
+                handleState(state)
+            }
         }
     }
 
diff --git a/tgbotapi.behaviour_builder.fsm/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/behaviour_builder/BehaviourWithFSMStateHandlerHolder.kt b/tgbotapi.behaviour_builder.fsm/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/behaviour_builder/BehaviourWithFSMStateHandlerHolder.kt
index 788c1cf3c1..fa3bdbd0e2 100644
--- a/tgbotapi.behaviour_builder.fsm/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/behaviour_builder/BehaviourWithFSMStateHandlerHolder.kt
+++ b/tgbotapi.behaviour_builder.fsm/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/behaviour_builder/BehaviourWithFSMStateHandlerHolder.kt
@@ -34,20 +34,11 @@ class BehaviourWithFSMStateHandlerHolder<I : O, O : State>(
 
     /**
      * Handling of state :)
-     *
-     * @param contextUpdatesFlow This [Flow] will be used as source of updates. By contract, this [Flow] must be common
-     * for all [State]s of incoming [state] [State.context] and for the whole chain inside of [BehaviourContextWithFSM]
      */
     suspend fun BehaviourContextWithFSM<in O>.handleState(
-        contextUpdatesFlow: Flow<Update>,
         state: O
-    ): O? {
-        val subscope = scope.LinkedSupervisorScope()
-        return with(copy(scope = subscope, upstreamUpdatesFlow = contextUpdatesFlow)) {
-            with(delegateTo) {
-                handleState(state as I)
-            }
-        }
+    ): O? = with(delegateTo) {
+        handleState(state as I)
     }
 }
 
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/answers/AnswerWebAppQuery.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/answers/AnswerWebAppQuery.kt
index ceacda665f..859959aebb 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/answers/AnswerWebAppQuery.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/answers/AnswerWebAppQuery.kt
@@ -6,6 +6,9 @@ import dev.inmo.tgbotapi.types.InlineQueries.InlineQueryResult.abstracts.InlineQ
 import dev.inmo.tgbotapi.types.webapps.query.SentWebAppMessage
 import kotlinx.serialization.*
 
+/**
+ * @param webAppQueryId [dev.inmo.tgbotapi.webapps.WebAppInitData.queryId]
+ */
 @Serializable
 data class AnswerWebAppQuery(
     @SerialName(webAppQueryIdField)
diff --git a/tgbotapi.webapps/src/jsMain/kotlin/dev/inmo/tgbotapi/webapps/AnswerWebAppQuery.kt b/tgbotapi.webapps/src/jsMain/kotlin/dev/inmo/tgbotapi/webapps/AnswerWebAppQuery.kt
new file mode 100644
index 0000000000..c77aa0b763
--- /dev/null
+++ b/tgbotapi.webapps/src/jsMain/kotlin/dev/inmo/tgbotapi/webapps/AnswerWebAppQuery.kt
@@ -0,0 +1,11 @@
+package dev.inmo.tgbotapi.webapps
+
+import dev.inmo.tgbotapi.bot.TelegramBot
+import dev.inmo.tgbotapi.requests.answers.AnswerWebAppQuery
+import dev.inmo.tgbotapi.types.InlineQueries.InlineQueryResult.abstracts.InlineQueryResult
+
+suspend fun TelegramBot.answerWebAppQuery(
+    result: InlineQueryResult
+) = webApp.initDataUnsafe.queryId ?.let {
+    execute(AnswerWebAppQuery(it, result))
+}
diff --git a/tgbotapi.webapps/src/jsMain/kotlin/dev/inmo/tgbotapi/webapps/SendData.kt b/tgbotapi.webapps/src/jsMain/kotlin/dev/inmo/tgbotapi/webapps/SendData.kt
new file mode 100644
index 0000000000..5f469cfd0f
--- /dev/null
+++ b/tgbotapi.webapps/src/jsMain/kotlin/dev/inmo/tgbotapi/webapps/SendData.kt
@@ -0,0 +1,18 @@
+package dev.inmo.tgbotapi.webapps
+
+import dev.inmo.tgbotapi.types.WebAppQueryId
+
+/**
+ * @param onSendData Should return the data which must be used in [WebApp.sendData]. If returns null, data will not be sent
+ * @param onAnswerWebAppQuery In case if [WebAppInitData.queryId] is presented in [WebApp.initDataUnsafe], will be called
+ * that callback. Before and after calling of this callback will not be used any method of answering to the telegram
+ * system, so, you must use something like [answerWebAppQuery] by yourself to send the result
+ */
+inline fun handleResult(
+    onSendData: () -> String?,
+    onAnswerWebAppQuery: (WebAppQueryId) -> Unit
+) {
+    webApp.initDataUnsafe.queryId ?.let {
+        onAnswerWebAppQuery(it)
+    } ?: webApp.sendData(onSendData() ?: return)
+}