diff --git a/CHANGELOG.md b/CHANGELOG.md
index 160aa1893d..8c76366160 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -26,6 +26,9 @@ must be regular text
 
 * `RequestsExecutor#executeAsync(Request, CoroutineScope)` now will return `Deferred` for cases when you need result
 * `RequestsExecutor#executeUnsafe` will automatically retry request if it was unsuccessful and retries > 0
+* Add `RequestError` sealed class and described in documentation known errors
+* Add `ResponseParametersRaw` which can create error based on input parameters
+* Add `parameters` field in `Response` and remove useless fields from `Response`
 
 ### 0.9.3
 
diff --git a/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/RequestError.kt b/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/RequestError.kt
new file mode 100644
index 0000000000..1d0bbe31f2
--- /dev/null
+++ b/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/RequestError.kt
@@ -0,0 +1,18 @@
+package com.github.insanusmokrassar.TelegramBotAPI.types
+
+import java.util.concurrent.TimeUnit
+
+sealed class RequestError
+
+data class RetryAfterError(
+    val seconds: Long,
+    val startCountingMillis: Long
+) : RequestError() {
+    val canContinue = TimeUnit.SECONDS.toMillis(seconds) + startCountingMillis
+}
+
+data class MigrateChatId(
+    val newChatId: ChatId
+) : RequestError()
+
+
diff --git a/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/Response.kt b/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/Response.kt
index adea55b8b4..a0089723fe 100644
--- a/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/Response.kt
+++ b/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/Response.kt
@@ -15,22 +15,11 @@ data class Response<T : Any>(
     val ok: Boolean = false,
     @Optional
     val description: String? = null,
-    @SerialName("migrate_to_chat_id")
-    @Optional
-    val migrateToChatId: Identifier? = null,
-    @SerialName("retry_after")
-    @Optional
-    val retryAfter: Int? = null,
     @SerialName("error_code")
     @Optional
     val errorCode: Int? = null,
     @Optional
-    val result: T? = null
-) {
-    @Transient
-    val waitUntil: DateTime? by lazy {
-        retryAfter ?.let {
-            DateTime.now().plus(TimeUnit.SECONDS.toMillis(it.toLong()))
-        }
-    }
-}
+    val result: T? = null,
+    @Optional
+    val parameters: ResponseParametersRaw? = null
+)
diff --git a/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/ResponseParametersRaw.kt b/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/ResponseParametersRaw.kt
new file mode 100644
index 0000000000..dc9ca9d7bf
--- /dev/null
+++ b/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/ResponseParametersRaw.kt
@@ -0,0 +1,24 @@
+package com.github.insanusmokrassar.TelegramBotAPI.types
+
+import kotlinx.serialization.*
+
+@Serializable
+data class ResponseParametersRaw(
+    @SerialName("migrate_to_chat_id")
+    @Optional
+    private val migrateToChatId: ChatId? = null,
+    @SerialName("retry_after")
+    @Optional
+    private val retryAfter: Long? = null
+) {
+    @Transient
+    private val createTime: Long = System.currentTimeMillis()
+
+    val error: RequestError? by lazy {
+        when {
+            migrateToChatId != null -> MigrateChatId(migrateToChatId);
+            retryAfter != null -> RetryAfterError(retryAfter, createTime);
+            else -> null
+        }
+    }
+}