👷 bidBuffer change

src/AuctionFactory.sol

@@ -7,12 +7,25 @@ import "@openzeppelin/contracts/proxy/Clones.sol";
 /// @title Auction Factory Contract for USDC-KWENTA Auctions
 /// @author Flocqst ([email protected])
 contract AuctionFactory {
+    /// @notice Kwenta owned/operated multisig address that
+    /// can authorize upgrades
+    /// @dev making immutable because the pDAO address
+    /// will *never* change
+    address internal immutable pDAO;
+
     /// @notice Address of the auction implementation contract
     address public auctionImplementation;
 
     /// @notice Array of all auctions created
     address[] public auctions;
 
+    /// @notice Bid buffer amount used for all auctions
+    uint256 public bidBuffer;
+
+    /// @notice thrown when attempting to update
+    /// the bidBuffer when caller is not the Kwenta pDAO
+    error OnlyPDAO();
+
     /// @notice Emitted when a new auction is created
     /// @param auctionContract The address of the newly created auction contract
     /// @param owner The address of the account that created the auction
@@ -25,6 +38,16 @@ contract AuctionFactory {
         address[] allAuctions
     );
 
+    /// @notice Emitted when the bid buffer is updated
+    /// @param _newBidBuffer The new bid buffer value
+    event BidBufferUpdated(uint256 _newBidBuffer);
+
+    /// @notice Modifier to restrict access to pDAO only
+    modifier onlyPDAO() {
+        if (msg.sender != pDAO) revert OnlyPDAO();
+        _;
+    }
+
     /// @notice Constructs the AuctionFactory with the address of the auction implementation contract
     /// @param _auctionImplementation The address of the auction implementation contract
     constructor(address _auctionImplementation) {
@@ -36,28 +59,34 @@ contract AuctionFactory {
     /// @param _usdc The address for the USDC ERC20 token
     /// @param _kwenta The address for the KWENTA ERC20 token
     /// @param _startingBid The starting bid amount
-    /// @param _bidBuffer The initial bid buffer amount
     /// @dev The newly created auction contract is initialized and added to the auctions array
     function createAuction(
         address _owner,
         address _usdc,
         address _kwenta,
-        uint256 _startingBid,
-        uint256 _bidBuffer
+        uint256 _startingBid
     ) external {
         address clone = Clones.clone(auctionImplementation);
         Auction(clone).initialize(
-            _owner, _usdc, _kwenta, _startingBid, _bidBuffer
+            _owner, _usdc, _kwenta, _startingBid, bidBuffer
         );
         Auction newAuction =
-            new Auction(_owner, _usdc, _kwenta, _startingBid, _bidBuffer);
+            new Auction(_owner, _usdc, _kwenta, _startingBid, bidBuffer);
         auctions.push(address(newAuction));
 
         emit AuctionCreated(
             address(newAuction), msg.sender, auctions.length, auctions
         );
     }
 
+    /// @notice Updates the bid buffer amount
+    /// @param _newBidBuffer The new bid buffer value to set
+    /// @dev Only callable by pDAO
+    function updateBidBuffer(uint256 _newBidBuffer) external onlyPDAO {
+        bidBuffer = _newBidBuffer;
+        emit BidBufferUpdated(_newBidBuffer);
+    }
+
     /// @notice Returns the array of all auction contract addresses
     function getAllAuctions() external view returns (address[] memory) {
         return auctions;