diff --git a/api/api.proto b/api/api.proto
index 03419d235d5..3d6c0ad0f8a 100644
--- a/api/api.proto
+++ b/api/api.proto
@@ -82,6 +82,9 @@ service Wallet {
   }
   rpc TotalTransaction (EmptyMessage) returns (NumberMessage) {
 
+  }
+  rpc GetDynamicProperties (EmptyMessage) returns (DynamicProperties) {
+
   }
 };
 // the api of tron's db
diff --git a/core/Tron.proto b/core/Tron.proto
index 7339733487a..b5914a3d33f 100644
--- a/core/Tron.proto
+++ b/core/Tron.proto
@@ -182,6 +182,11 @@ message Items {
   repeated Transaction transactions = 4;
 }
 
+// DynamicProperties
+message DynamicProperties {
+  int64 last_solidity_block_num = 1;
+}
+
 enum ReasonCode {
   REQUESTED = 0;
   TCP_ERROR = 1;