diff --git a/system-actors/src/env/mod.rs b/system-actors/src/env/mod.rs
index 3f645d3..2b2f660 100644
--- a/system-actors/src/env/mod.rs
+++ b/system-actors/src/env/mod.rs
@@ -265,3 +265,12 @@ pub struct IsMainNetRequest;
 #[doc(hidden)]
 #[derive(Debug, Clone, Serialize, Deserialize, TypeId)]
 pub struct IsMainNetResponse(pub bool);
+
+#[doc(hidden)]
+#[derive(Debug, Clone, Serialize, Deserialize, TypeId, Priced)]
+#[price(10000)]
+pub struct GetStartupProofRequest;
+
+#[doc(hidden)]
+#[derive(Debug, Clone, Serialize, Deserialize, TypeId)]
+pub struct GetStartupProofResponse(pub Option<String>);