feat(bulk-renew): implement add-bulk-renew

src/RONRegistrarController.sol

@@ -228,6 +228,35 @@ contract RONRegistrarController is
     _transferRONToTreasury();
   }
 
+  /**
+   * @inheritdoc IRONRegistrarController
+   */
+  function bulkRenew(string[] calldata names, uint64[] calldata durations) external payable whenNotPaused nonReentrant {
+    uint256 length = names.length;
+    if (length == 0 || length != durations.length) revert InvalidArrayLength();
+
+    uint256 id;
+    uint256 totalPrice;
+    uint64 expiryTime;
+
+    for (uint256 i; i < length; ++i) {
+      (, uint256 ronPrice) = rentPrice(names[i], durations[i]);
+      totalPrice += ronPrice;
+
+      // Require id to be > previous id to prevent duplicate names
+      if (id >= (id = computeId(names[i]))) revert InvalidOrderOfNames();
+
+      expiryTime = _rnsUnified.renew(id, durations[i]);
+      emit NameRenewed(names[i], id, ronPrice, expiryTime);
+    }
+
+    if (msg.value < totalPrice) revert InsufficientValue();
+    uint256 remainAmount = msg.value - totalPrice;
+
+    if (remainAmount != 0) RONTransferHelper.safeTransfer(payable(_msgSender()), remainAmount);
+    _transferRONToTreasury();
+  }
+
   /**
    * @inheritdoc IRONRegistrarController
    */

src/interfaces/IRONRegistrarController.sol

@@ -40,6 +40,8 @@ interface IRONRegistrarController {
   error InvalidArrayLength();
   /// @dev Thrown when treasury address is set to null
   error NullAddress();
+  /// @dev Thrown when the names is not sorted in ascending order
+  error InvalidOrderOfNames();
 
   /**
    * @dev Emitted when the min registration duration is updated.
@@ -176,6 +178,17 @@ interface IRONRegistrarController {
    */
   function renew(string calldata name, uint64 duration) external payable;
 
+  /**
+   * @dev Renew multiple names in a single transaction.
+   * Requirements:
+   * - `names` and `duration` arrays must have the same length.
+   * - The caller must provide enough value to cover the total renewal cost.
+   * - `names` must be sorted in ascending order.
+   * @param names The array of names to be renewed.
+   * @param duration The array of durations for the renewal.
+   */
+  function bulkRenew(string[] calldata names, uint64[] calldata durations) external payable;
+
   /**
    * @dev Registers a protected name.
    *