diff --git a/publishing/api/src/commonMain/kotlin/com/insanusmokrassar/postssystem/core/publishing/PublishingKeyReceiver.kt b/publishing/api/src/commonMain/kotlin/com/insanusmokrassar/postssystem/core/publishing/PublishingKeyReceiver.kt
new file mode 100644
index 00000000..405f6bc5
--- /dev/null
+++ b/publishing/api/src/commonMain/kotlin/com/insanusmokrassar/postssystem/core/publishing/PublishingKeyReceiver.kt
@@ -0,0 +1,7 @@
+package com.insanusmokrassar.postssystem.core.publishing
+
+import com.insanusmokrassar.postssystem.core.post.PostId
+
+interface PublishingKeyReceiver : Trigger {
+    suspend fun acceptKey(postId: PostId, publishingKey: TriggerControlKey)
+}
diff --git a/publishing/api/src/commonMain/kotlin/com/insanusmokrassar/postssystem/core/publishing/Trigger.kt b/publishing/api/src/commonMain/kotlin/com/insanusmokrassar/postssystem/core/publishing/Trigger.kt
new file mode 100644
index 00000000..16b8703f
--- /dev/null
+++ b/publishing/api/src/commonMain/kotlin/com/insanusmokrassar/postssystem/core/publishing/Trigger.kt
@@ -0,0 +1,7 @@
+package com.insanusmokrassar.postssystem.core.publishing
+
+typealias TriggerId = String
+
+interface Trigger {
+    val id: TriggerId
+}
\ No newline at end of file