diff --git a/wallet/v1/msg.proto b/wallet/v1/msg.proto
index a01a095..8dafd4d 100644
--- a/wallet/v1/msg.proto
+++ b/wallet/v1/msg.proto
@@ -559,12 +559,19 @@ message EffectiveCommission {
   double total = 3;
 }
 
+message RefundCommissionReq {
+  auth.v1.UserIdentityBasic user = 3;
+  uint64 commission_log_id = 1;
+}
 message CommissionReq {
   uint64 commission_id = 1;
   double amount = 2;
   auth.v1.UserIdentityBasic user = 3;
 }
-message CommissionRes {}
+
+message CommissionRes {
+  uint64 commission_log_id = 1;
+}
 
 /*
  * IPG - Internet Payment Gateway