feat: add encoding field to MsgTransfer

proto/neutron/transfer/v1/tx.proto

@@ -50,6 +50,9 @@ message MsgTransfer {
   string memo = 8;
 
   neutron.feerefunder.Fee fee = 9 [(gogoproto.nullable) = false];
+
+  // optional encoding
+  string encoding = 10;
 }
 
 // MsgTransferResponse is the modified response type for

x/transfer/keeper/keeper.go

@@ -58,6 +58,7 @@ func (k KeeperTransferWrapper) Transfer(goCtx context.Context, msg *wrappedtypes
 	}
 
 	transferMsg := types.NewMsgTransfer(msg.SourcePort, msg.SourceChannel, msg.Token, msg.Sender, msg.Receiver, msg.TimeoutHeight, msg.TimeoutTimestamp, msg.Memo)
+	transferMsg.Encoding = msg.Encoding // types.NewMsgTransfer() doesn't have encoding parameter and doesn't set the field (as of ibc-go v10.5.0)
 	if _, err := k.Keeper.Transfer(goCtx, transferMsg); err != nil {
 		return nil, err
 	}

x/transfer/types/tx.go

@@ -46,6 +46,7 @@ func MsgOrigTransferHandler(srv interface{}, ctx context.Context, dec func(inter
 		TimeoutTimestamp: in.TimeoutTimestamp,
 		Memo:             in.Memo,
 		Fee:              feerefundertypes.Fee{},
+		Encoding:         in.Encoding,
 	}
 	if interceptor == nil {
 		return srv.(MsgServer).Transfer(ctx, conv)
@@ -66,6 +67,7 @@ func MsgOrigTransferHandler(srv interface{}, ctx context.Context, dec func(inter
 			TimeoutTimestamp: reqT.TimeoutTimestamp,
 			Memo:             reqT.Memo,
 			Fee:              feerefundertypes.Fee{},
+			Encoding:         reqT.Encoding,
 		}
 		return srv.(MsgServer).Transfer(ctx, convReq)
 	}