diff --git a/CHANGELOG.md b/CHANGELOG.md
index aaa9f86432..527eeb9b62 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -24,10 +24,13 @@
     * Two new dsl:
         * `inlineKeyboard` for creating `InlineKeyboardMarkup`
         * `replyKeyboard` for creating `ReplyKeyboardMarkup`
-    * Cast helpers for `Message`:
+    * Cast helpers for `Message` (thanks to [madhead](https://github.com/madhead)):
         * `asPossiblyReplyMessage`: tries to cast a `Message` to `PossiblyReplyMessage`, returns `null` if the message is not of that type
         * `requirePossiblyReplyMessage`: casts a `Message` to `PossiblyReplyMessage`, fails if the message is not of that type
         * `whenPossiblyReplyMessage`: tries to cast a `Message` to `PossiblyReplyMessage` and runs the given block of code with it, if the cast is successful
+    * New type `WithUser` for unioning of all types with `user`
+        * `FromUser` now extends `WithUser`
+        * Cast helpers for type `WithUser`: `asWithUser`, `whenWithUser`, `requireWithUser`
 * `Behaviour Builder`:
     * New expecters and waiters:
         * `waitShippingQueries`/`onShippingQuery`
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/CommonAbstracts/FromUser.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/CommonAbstracts/FromUser.kt
index d45e65b52f..698f36c45a 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/CommonAbstracts/FromUser.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/CommonAbstracts/FromUser.kt
@@ -2,6 +2,15 @@ package dev.inmo.tgbotapi.CommonAbstracts
 
 import dev.inmo.tgbotapi.types.User
 
-interface FromUser {
-    val user: User
-}
\ No newline at end of file
+/**
+ * Inheritors of this interface have some [User] as a source of data. For example, any [dev.inmo.tgbotapi.types.CallbackQuery.CallbackQuery]
+ * have [User] as the source of that query
+ */
+interface FromUser : WithUser {
+    /**
+     * The source [User] of this type
+     */
+    val from: User
+    override val user: User
+        get() = from
+}
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/CommonAbstracts/WithUser.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/CommonAbstracts/WithUser.kt
new file mode 100644
index 0000000000..765a8d1e13
--- /dev/null
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/CommonAbstracts/WithUser.kt
@@ -0,0 +1,12 @@
+package dev.inmo.tgbotapi.CommonAbstracts
+
+import dev.inmo.tgbotapi.types.User
+
+/**
+ * All inheritors of this type have [User] in their data as one of the main data
+ *
+ * @see FromUser
+ */
+interface WithUser {
+    val user: User
+}
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/CallbackQuery/CallbackQuery.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/CallbackQuery/CallbackQuery.kt
index 3ab043ed28..dbbd8a2699 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/CallbackQuery/CallbackQuery.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/CallbackQuery/CallbackQuery.kt
@@ -11,7 +11,7 @@ sealed interface CallbackQuery : FromUser {
 
 data class UnknownCallbackQueryType(
     override val id: CallbackQueryIdentifier,
-    override val user: User,
+    override val from: User,
     override val chatInstance: String,
     val raw: String
 ) : CallbackQuery
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/CallbackQuery/InlineMessageIdDataCallbackQuery.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/CallbackQuery/InlineMessageIdDataCallbackQuery.kt
index aa4ecf9f70..bdb013340e 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/CallbackQuery/InlineMessageIdDataCallbackQuery.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/CallbackQuery/InlineMessageIdDataCallbackQuery.kt
@@ -4,7 +4,7 @@ import dev.inmo.tgbotapi.types.*
 
 data class InlineMessageIdDataCallbackQuery(
     override val id: CallbackQueryIdentifier,
-    override val user: User,
+    override val from: User,
     override val chatInstance: String,
     override val inlineMessageId: InlineMessageIdentifier,
     override val data: String
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/CallbackQuery/InlineMessageIdGameShortNameCallbackQuery.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/CallbackQuery/InlineMessageIdGameShortNameCallbackQuery.kt
index f54793fcd4..8369e71332 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/CallbackQuery/InlineMessageIdGameShortNameCallbackQuery.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/CallbackQuery/InlineMessageIdGameShortNameCallbackQuery.kt
@@ -4,7 +4,7 @@ import dev.inmo.tgbotapi.types.*
 
 data class InlineMessageIdGameShortNameCallbackQuery(
     override val id: CallbackQueryIdentifier,
-    override val user: User,
+    override val from: User,
     override val chatInstance: String,
     override val inlineMessageId: InlineMessageIdentifier,
     override val gameShortName: String
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/CallbackQuery/MessageDataCallbackQuery.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/CallbackQuery/MessageDataCallbackQuery.kt
index 9f6047197f..e276bd219e 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/CallbackQuery/MessageDataCallbackQuery.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/CallbackQuery/MessageDataCallbackQuery.kt
@@ -6,7 +6,7 @@ import dev.inmo.tgbotapi.types.message.abstracts.Message
 
 data class MessageDataCallbackQuery(
     override val id: CallbackQueryIdentifier,
-    override val user: User,
+    override val from: User,
     override val chatInstance: String,
     override val message: Message,
     override val data: String
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/CallbackQuery/MessageGameShortNameCallbackQuery.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/CallbackQuery/MessageGameShortNameCallbackQuery.kt
index f026675b13..208f820179 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/CallbackQuery/MessageGameShortNameCallbackQuery.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/CallbackQuery/MessageGameShortNameCallbackQuery.kt
@@ -6,7 +6,7 @@ import dev.inmo.tgbotapi.types.message.abstracts.Message
 
 data class MessageGameShortNameCallbackQuery(
     override val id: CallbackQueryIdentifier,
-    override val user: User,
+    override val from: User,
     override val chatInstance: String,
     override val message: Message,
     override val gameShortName: String
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/ChatMember/abstracts/ChatMember.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/ChatMember/abstracts/ChatMember.kt
index 2551a7d017..8b6de401ab 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/ChatMember/abstracts/ChatMember.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/ChatMember/abstracts/ChatMember.kt
@@ -1,5 +1,6 @@
 package dev.inmo.tgbotapi.types.ChatMember.abstracts
 
+import dev.inmo.tgbotapi.CommonAbstracts.WithUser
 import dev.inmo.tgbotapi.types.ChatMember.*
 import dev.inmo.tgbotapi.types.User
 import dev.inmo.tgbotapi.types.statusField
@@ -14,9 +15,7 @@ import kotlinx.serialization.json.JsonObject
 import kotlinx.serialization.json.jsonPrimitive
 
 @Serializable(ChatMemberSerializer::class)
-sealed interface ChatMember {
-    val user: User
-}
+sealed interface ChatMember : WithUser
 
 @RiskFeature
 object ChatMemberSerializer : KSerializer<ChatMember> {
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/InlineQueries/ChosenInlineResult/BaseChosenInlineResult.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/InlineQueries/ChosenInlineResult/BaseChosenInlineResult.kt
index bf85756e09..a19a61d7a0 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/InlineQueries/ChosenInlineResult/BaseChosenInlineResult.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/InlineQueries/ChosenInlineResult/BaseChosenInlineResult.kt
@@ -8,7 +8,7 @@ import kotlinx.serialization.Serializable
 data class BaseChosenInlineResult(
     override val resultId: InlineQueryIdentifier,
     @SerialName(fromField)
-    override val user: User,
+    override val from: User,
     override val inlineMessageId: InlineMessageIdentifier?,
     override val query: String
 ) : ChosenInlineResult
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/InlineQueries/ChosenInlineResult/LocationChosenInlineResult.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/InlineQueries/ChosenInlineResult/LocationChosenInlineResult.kt
index 30388e7e6f..c56bc5e520 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/InlineQueries/ChosenInlineResult/LocationChosenInlineResult.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/InlineQueries/ChosenInlineResult/LocationChosenInlineResult.kt
@@ -9,7 +9,7 @@ import kotlinx.serialization.Serializable
 data class LocationChosenInlineResult(
     override val resultId: InlineQueryIdentifier,
     @SerialName(fromField)
-    override val user: User,
+    override val from: User,
     val location: StaticLocation,
     override val inlineMessageId: InlineMessageIdentifier?,
     override val query: String
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/InlineQueries/query/InlineQuery.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/InlineQueries/query/InlineQuery.kt
index 2e7c093d8d..f94e97b18e 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/InlineQueries/query/InlineQuery.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/InlineQueries/query/InlineQuery.kt
@@ -1,12 +1,11 @@
 package dev.inmo.tgbotapi.types.InlineQueries.query
 
+import dev.inmo.tgbotapi.CommonAbstracts.FromUser
 import dev.inmo.tgbotapi.types.InlineQueryIdentifier
-import dev.inmo.tgbotapi.types.User
 import dev.inmo.tgbotapi.types.chat.ChatType
 
-sealed interface InlineQuery {
+sealed interface InlineQuery : FromUser {
     val id: InlineQueryIdentifier
-    val from: User
     val query: String
     val offset: String
     val chatType: ChatType?
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/message/ChatEvents/LeftChatMember.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/message/ChatEvents/LeftChatMember.kt
index a8b3bf1668..925cfb35bb 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/message/ChatEvents/LeftChatMember.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/message/ChatEvents/LeftChatMember.kt
@@ -1,8 +1,9 @@
 package dev.inmo.tgbotapi.types.message.ChatEvents
 
+import dev.inmo.tgbotapi.CommonAbstracts.WithUser
 import dev.inmo.tgbotapi.types.User
 import dev.inmo.tgbotapi.types.message.ChatEvents.abstracts.PublicChatEvent
 
 data class LeftChatMember(
-    val user: User
-) : PublicChatEvent
+    override val user: User
+) : PublicChatEvent, WithUser
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/message/CommonGroupEventMessage.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/message/CommonGroupEventMessage.kt
index 03e228f693..2e9b602668 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/message/CommonGroupEventMessage.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/message/CommonGroupEventMessage.kt
@@ -9,7 +9,7 @@ import dev.inmo.tgbotapi.types.message.abstracts.GroupEventMessage
 
 data class CommonGroupEventMessage<T : GroupEvent>(
     override val messageId: MessageIdentifier,
-    override val user: User,
+    override val from: User,
     override val chat: GroupChat,
     override val chatEvent: T,
     override val date: DateTime
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/message/CommonMediaGroupMessage.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/message/CommonMediaGroupMessage.kt
index 49d1118e57..28bbacf8bc 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/message/CommonMediaGroupMessage.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/message/CommonMediaGroupMessage.kt
@@ -9,7 +9,7 @@ import dev.inmo.tgbotapi.types.message.content.abstracts.MediaGroupContent
 
 data class CommonMediaGroupMessage<T : MediaGroupContent>(
     override val messageId: MessageIdentifier,
-    override val user: User,
+    override val from: User,
     override val chat: Chat,
     override val date: DateTime,
     override val mediaGroupId: MediaGroupIdentifier,
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/message/CommonSupergroupEventMessage.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/message/CommonSupergroupEventMessage.kt
index b63a7dbf1b..124fe0cac6 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/message/CommonSupergroupEventMessage.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/message/CommonSupergroupEventMessage.kt
@@ -9,7 +9,7 @@ import dev.inmo.tgbotapi.types.message.abstracts.SupergroupEventMessage
 
 data class CommonSupergroupEventMessage<T : SupergroupEvent>(
     override val messageId: MessageIdentifier,
-    override val user: User,
+    override val from: User,
     override val chat: SupergroupChat,
     override val chatEvent: T,
     override val date: DateTime
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/message/ForwardInfo.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/message/ForwardInfo.kt
index 7ca6f21d87..f239b9d235 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/message/ForwardInfo.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/message/ForwardInfo.kt
@@ -1,5 +1,6 @@
 package dev.inmo.tgbotapi.types.message
 
+import dev.inmo.tgbotapi.CommonAbstracts.FromUser
 import dev.inmo.tgbotapi.types.*
 import dev.inmo.tgbotapi.types.chat.abstracts.ChannelChat
 import dev.inmo.tgbotapi.types.chat.abstracts.SupergroupChat
@@ -15,8 +16,8 @@ data class AnonymousForwardInfo(
 
 data class UserForwardInfo(
     override val dateOfOriginal: TelegramDate,
-    val from: User
-) : ForwardInfo()
+    override val from: User
+) : ForwardInfo(), FromUser
 
 data class ForwardFromChannelInfo(
     override val dateOfOriginal: TelegramDate,
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/message/GroupMessages.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/message/GroupMessages.kt
index e24405ba79..0fee420bf2 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/message/GroupMessages.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/message/GroupMessages.kt
@@ -38,7 +38,7 @@ data class AnonymousGroupContentMessageImpl<T : MessageContent>(
 data class CommonGroupContentMessageImpl<T : MessageContent>(
     override val chat: GroupChat,
     override val messageId: MessageIdentifier,
-    override val user: User,
+    override val from: User,
     override val date: DateTime,
     override val forwardInfo: ForwardInfo?,
     override val editDate: DateTime?,
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/message/PassportMessage.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/message/PassportMessage.kt
index 55153e159f..b249d704e2 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/message/PassportMessage.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/message/PassportMessage.kt
@@ -11,7 +11,7 @@ import dev.inmo.tgbotapi.types.passport.PassportData
 data class PassportMessage(
     override val messageId: MessageIdentifier,
     override val chat: Chat,
-    override val user: User,
+    override val from: User,
     override val date: DateTime,
     val passportData: PassportData
 ) : Message, FromUserMessage
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/message/PrivateMessageImpl.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/message/PrivateMessageImpl.kt
index 599fce4c76..e08dd2d4ba 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/message/PrivateMessageImpl.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/message/PrivateMessageImpl.kt
@@ -11,7 +11,7 @@ import dev.inmo.tgbotapi.types.message.payments.SuccessfulPaymentEvent
 
 data class PrivateContentMessageImpl<T: MessageContent>(
     override val messageId: MessageIdentifier,
-    override val user: User,
+    override val from: User,
     override val chat: Chat,
     override val content: T,
     override val date: DateTime,
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/payments/PreCheckoutQuery.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/payments/PreCheckoutQuery.kt
index dfdfe4a1a7..d221e408b2 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/payments/PreCheckoutQuery.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/payments/PreCheckoutQuery.kt
@@ -12,7 +12,7 @@ data class PreCheckoutQuery(
     @SerialName(idField)
     val id: PreCheckoutQueryId,
     @SerialName(fromField)
-    override val user: User,
+    override val from: User,
     @SerialName(currencyField)
     override val currency: Currency,
     @SerialName(totalAmountField)
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/payments/ShippingQuery.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/payments/ShippingQuery.kt
index 7821211bf6..d72e2fef65 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/payments/ShippingQuery.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/payments/ShippingQuery.kt
@@ -10,7 +10,7 @@ data class ShippingQuery(
     @SerialName(idField)
     val id: ShippingQueryIdentifier,
     @SerialName(fromField)
-    override val user: User,
+    override val from: User,
     @SerialName(invoicePayloadField)
     val invoicePayload: InvoicePayload,
     @SerialName(shippingAddressField)
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/polls/PollAnswer.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/polls/PollAnswer.kt
index c4ea74bfa0..0411d5e8ec 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/polls/PollAnswer.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/polls/PollAnswer.kt
@@ -2,8 +2,7 @@ package dev.inmo.tgbotapi.types.polls
 
 import dev.inmo.tgbotapi.CommonAbstracts.FromUser
 import dev.inmo.tgbotapi.types.*
-import kotlinx.serialization.SerialName
-import kotlinx.serialization.Serializable
+import kotlinx.serialization.*
 
 @Serializable
 data class PollAnswer(
@@ -13,4 +12,8 @@ data class PollAnswer(
     override val user: User,
     @SerialName(optionIdsField)
     val chosen: List<Int>
-) : FromUser
+) : FromUser {
+    @Transient
+    override val from: User
+        get() = user
+}
diff --git a/tgbotapi.extensions.utils/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/utils/ClassCasts.kt b/tgbotapi.extensions.utils/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/utils/ClassCasts.kt
index c89200d275..ae3d35a63c 100644
--- a/tgbotapi.extensions.utils/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/utils/ClassCasts.kt
+++ b/tgbotapi.extensions.utils/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/utils/ClassCasts.kt
@@ -2,8 +2,7 @@
 
 package dev.inmo.tgbotapi.extensions.utils
 
-import dev.inmo.tgbotapi.CommonAbstracts.CommonSendInvoiceData
-import dev.inmo.tgbotapi.CommonAbstracts.FromUser
+import dev.inmo.tgbotapi.CommonAbstracts.*
 import dev.inmo.tgbotapi.requests.send.payments.SendInvoice
 import dev.inmo.tgbotapi.types.*
 import dev.inmo.tgbotapi.types.CallbackQuery.*
@@ -3154,6 +3153,15 @@ inline fun Any.asFromUser(): FromUser? = this as? FromUser
 @PreviewFeature
 inline fun Any.requireFromUser(): FromUser = this as FromUser
 
+@PreviewFeature
+inline fun <T> Any.whenWithUser(block: (WithUser) -> T) = asWithUser() ?.let(block)
+
+@PreviewFeature
+inline fun Any.asWithUser(): WithUser? = this as? WithUser
+
+@PreviewFeature
+inline fun Any.requireWithUser(): WithUser = this as WithUser
+
 @PreviewFeature
 inline fun <T> Any.whenWithOptionalLanguageCode(block: (WithOptionalLanguageCode) -> T) = asWithOptionalLanguageCode() ?.let(block)
 
diff --git a/tgbotapi.extensions.utils/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/utils/extensions/UpdateChatRetriever.kt b/tgbotapi.extensions.utils/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/utils/extensions/UpdateChatRetriever.kt
index a1f341c16b..9507f7052b 100644
--- a/tgbotapi.extensions.utils/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/utils/extensions/UpdateChatRetriever.kt
+++ b/tgbotapi.extensions.utils/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/utils/extensions/UpdateChatRetriever.kt
@@ -1,5 +1,7 @@
 package dev.inmo.tgbotapi.extensions.utils.extensions
 
+import dev.inmo.tgbotapi.CommonAbstracts.FromUser
+import dev.inmo.tgbotapi.CommonAbstracts.WithUser
 import dev.inmo.tgbotapi.extensions.utils.asFromUser
 import dev.inmo.tgbotapi.extensions.utils.asUser
 import dev.inmo.tgbotapi.extensions.utils.shortcuts.chat
@@ -12,20 +14,24 @@ import dev.inmo.tgbotapi.types.update.abstracts.Update
 import dev.inmo.tgbotapi.utils.PreviewFeature
 
 @PreviewFeature
-fun Update.sourceChat(): Chat? = when (this) {
-    is MediaGroupUpdate -> when (this) {
+fun Update.sourceChat(): Chat? = when {
+    this is MediaGroupUpdate -> when (this) {
         is SentMediaGroupUpdate -> data.chat
         is EditMediaGroupUpdate -> data.chat
     }
-    is BaseMessageUpdate -> data.chat
-    is InlineQueryUpdate -> data.from
-    is ChosenInlineResultUpdate -> data.user
-    is CallbackQueryUpdate -> data.user
-    is PreCheckoutQueryUpdate -> data.user
-    is PollAnswerUpdate -> data.user
-    is ShippingQueryUpdate -> data.user
-    else -> null
+    this is BaseMessageUpdate -> data.chat
+    else -> {
+        when (val data = data) {
+            is FromUser -> data.from
+            is WithUser -> data.user
+            else -> null
+        }
+    }
 }
 
 @PreviewFeature
-fun Update.sourceUser(): User? = data.asFromUser()?.user ?: sourceChat()?.asUser()
+fun Update.sourceUser(): User? = when (val data = data) {
+    is FromUser -> data.from
+    is WithUser -> data.user
+    else -> sourceChat()?.asUser()
+}