diff --git a/market/v1/msg.proto b/market/v1/msg.proto
index 3310cac..6765495 100644
--- a/market/v1/msg.proto
+++ b/market/v1/msg.proto
@@ -171,3 +171,10 @@ message DeclineMarketContractReq {
   auth.v1.InternalIAM iam = 1;
   uint64 agreement_id = 2;
 }
+
+message MarketContractReq {
+  auth.v1.InternalIAM iam = 1;
+  uint64 order_id = 2; // Maker OrderID
+  double amount = 3;
+  wallet.v1.BuyAssetSide req_side = 4;
+}