diff --git a/wallet/v1/msg.proto b/wallet/v1/msg.proto
index caa0c25..00088b0 100644
--- a/wallet/v1/msg.proto
+++ b/wallet/v1/msg.proto
@@ -547,4 +547,11 @@ message BuyAssetReq {
 
 message BuyAssetRes {
   int64 id = 1;
+  Asset asset = 2;
+  double amount = 3;
+  double calculated_amount = 4;
+  double fee_amount = 5;
+  double discount_amount = 6;
+  double buy_min_amount = 7;
+
 }
diff --git a/wallet/v1/srv.proto b/wallet/v1/srv.proto
index 301760d..291b007 100644
--- a/wallet/v1/srv.proto
+++ b/wallet/v1/srv.proto
@@ -61,5 +61,6 @@ service WalletService {
   rpc WithdrawIRT(WithdrawIRTReq) returns (WithdrawIRTRes);
   rpc DepositIRT(DepositIRTReq) returns (IPGGetTokenRes);
 
+  rpc CalcBuyAsset(BuyAssetReq) returns (BuyAssetRes);
   rpc BuyAsset(BuyAssetReq) returns (BuyAssetRes);
 }