From 565c0e4b12e9b76e23f511ee5521e10bf7bfaf6a Mon Sep 17 00:00:00 2001
From: owen05 <liuhongnan53@163.com>
Date: Sat, 18 Sep 2021 16:40:12 +0800
Subject: [PATCH] add view

---
 contracts/NFTPool/impl/FilterAdmin.sol  | 2 ++
 contracts/NFTPool/intf/IFilterAdmin.sol | 4 ++--
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/contracts/NFTPool/impl/FilterAdmin.sol b/contracts/NFTPool/impl/FilterAdmin.sol
index 927b48e..359167b 100644
--- a/contracts/NFTPool/impl/FilterAdmin.sol
+++ b/contracts/NFTPool/impl/FilterAdmin.sol
@@ -73,6 +73,7 @@ contract FilterAdmin is InitializableInternalMintableERC20 {
 
     //================ View ================
     function queryMintFee(uint256 rawAmount)
+        view
         public
         returns (
             uint256 poolFee,
@@ -87,6 +88,7 @@ contract FilterAdmin is InitializableInternalMintableERC20 {
     }
 
     function queryBurnFee(uint256 rawAmount)
+        view
         public
         returns (
             uint256 poolFee,
diff --git a/contracts/NFTPool/intf/IFilterAdmin.sol b/contracts/NFTPool/intf/IFilterAdmin.sol
index 8cd63b7..29e68d5 100644
--- a/contracts/NFTPool/intf/IFilterAdmin.sol
+++ b/contracts/NFTPool/intf/IFilterAdmin.sol
@@ -8,9 +8,9 @@
 pragma solidity 0.6.9;
 
 interface IFilterAdmin {
-    function _OWNER_() external returns (address);
+    function _OWNER_() external view returns (address);
 
-    function _CONTROLLER_() external returns (address);
+    function _CONTROLLER_() external view returns (address);
 
     function init(
         address owner,