MarketPlace: parent order

Signed-off-by: nfel <nfilsaraee@gmail.com>

market/v1/msg.proto

@@ -18,7 +18,7 @@ message MarketOrder {
   double total_price = 7;
   MarketOrderType type = 8;
   MarketOrderStatus status = 9;
-  string from = 10;
+  int64 from = 10;
   float commission = 11;
   float completion_rate = 12;
   string created_at = 13;
@@ -27,6 +27,7 @@ message MarketOrder {
   wallet.v1.TransactionList trx = 16;
   repeated string tags = 17;
   repeated string comment = 18;
+  optional MarketOrder parent = 19; // purchase is done via this field
   // repeated string attachments = 14; // possible files included by seller/buyer
 }
 
@@ -34,6 +35,7 @@ message MarketAssetListReq{
   base.v1.BaseQueryParam base = 1;
   optional auth.v1.InternalIAM iam = 2; // If not set, will returns only public orders which are limited by a white list
 }
+
 message MarketAssetList{
   repeated wallet.v1.Asset list = 1;
 }