change WUSD payment to USDC

contracts/ytLending/LendingPriceFeed.sol

@@ -0,0 +1,39 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.0;
+
+import "../interfaces/IYTVault.sol";
+import "@openzeppelin/contracts/access/Ownable.sol";
+
+contract LendingPriceFeed is Ownable {
+    address public ytVault;
+    address public wusdAddress;
+
+    error InvalidYTVaultAddress();
+    error InvalidWUSDAddress();
+    
+    constructor(address _ytVault, address _wusdAddress) Ownable(msg.sender) {
+        if (_ytVault == address(0)) revert InvalidYTVaultAddress();
+        if (_wusdAddress == address(0)) revert InvalidWUSDAddress();
+        ytVault = _ytVault;
+        wusdAddress = _wusdAddress;
+    }
+
+    function setYTVault(address _ytVault) external onlyOwner {
+        if (_ytVault == address(0)) revert InvalidYTVaultAddress();
+        ytVault = _ytVault;
+    }
+
+    function setWUSDAddress(address _wusdAddress) external onlyOwner {
+        if (_wusdAddress == address(0)) revert InvalidWUSDAddress();
+        wusdAddress = _wusdAddress;
+    }
+    
+    function getPrice(address _token) external view returns (uint256) {
+        if (_token == wusdAddress) {
+            return IYTVault(ytVault).wusdPrice();
+        } else {
+            return IYTVault(_token).ytPrice();
+        }
+    }
+}
+