diff --git a/api/api.proto b/api/api.proto
index a571e0bdb4c..3b47771b2c3 100644
--- a/api/api.proto
+++ b/api/api.proto
@@ -84,11 +84,21 @@ service Wallet {
 
   }
 };
+
 // the api of tron's db
 service Database {
   // for tapos
   rpc getBlockReference (EmptyMessage) returns (BlockReference) {
 
+  }
+  rpc GetDynamicProperties (EmptyMessage) returns (DynamicProperties) {
+
+  }
+  rpc GetNowBlock (EmptyMessage) returns (Block) {
+
+  }
+  rpc GetBlockByNum (NumberMessage) returns (Block) {
+
   }
 };
 
diff --git a/core/Contract.proto b/core/Contract.proto
index b334f7709b0..a00c82eec58 100644
--- a/core/Contract.proto
+++ b/core/Contract.proto
@@ -19,6 +19,7 @@ package protocol;
 
 option java_package = "org.tron.protos"; //Specify the name of the package that generated the Java file
 option java_outer_classname = "Contract"; //Specify the class name of the generated Java file
+option go_package = "github.com/tronprotocol/go-client-api/core";
 
 import "core/Tron.proto";
 
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;