Update x/cronos/keeper/msg_server.go

Author: yihuang

x/cronos/keeper/msg_server.go

@@ -62,7 +62,8 @@ func (k msgServer) TransferTokens(goCtx context.Context, msg *types.MsgTransferT
 func (k msgServer) UpdateTokenMapping(goCtx context.Context, msg *types.MsgUpdateTokenMapping) (*types.MsgUpdateTokenMappingResponse, error) {
 	ctx := sdk.UnwrapSDKContext(goCtx)
 	admin := k.Keeper.GetParams(ctx).CronosAdmin
-	if len(admin) > 0 && admin != msg.Sender {
+        // if admin is empty, no sender could be equal to it
+	if admin != msg.Sender {
 		return nil, sdkerrors.Wrap(sdkerrors.ErrInvalidAddress, "msg sender is authorized")
 	}
 	// msg is already validated