feat: implement IERC165

Author: 0xAustrian

package.json

@@ -37,6 +37,9 @@
     "test/unit/**/*.tree": "yarn lint:bulloak",
     "package.json": "sort-package-json"
   },
+  "dependencies": {
+    "@openzeppelin/contracts": "5.4.0"
+  },
   "devDependencies": {
     "@commitlint/cli": "19.3.0",
     "@commitlint/config-conventional": "19.2.2",

remappings.txt

@@ -1,5 +1,6 @@
 forge-std/=node_modules/forge-std/src
 halmos-cheatcodes=node_modules/halmos-cheatcodes
+openzeppelin-contracts=node_modules/@openzeppelin/contracts
 
 contracts/=src/contracts
 interfaces/=src/interfaces

src/contracts/L2Resolver.sol

@@ -1,7 +1,9 @@
 // SPDX-License-Identifier: MIT
 pragma solidity 0.8.30;
 
+import {IERC165} from 'openzeppelin-contracts/interfaces/IERC165.sol';
 import {IENS} from 'src/interfaces/IENS.sol';
+import {IExtendedResolver} from 'src/interfaces/IExtendedResolver.sol';
 import {IL2Resolver} from 'src/interfaces/IL2Resolver.sol';
 import {INameWrapper} from 'src/interfaces/INameWrapper.sol';
 
@@ -12,7 +14,7 @@ import {INameWrapper} from 'src/interfaces/INameWrapper.sol';
  * formatted chain identifiers and allows reverse lookup by mapping them back to their primary ENS names.
  * EIP-7930 is an example of supported chain identifier.
  */
-contract L2Resolver is IL2Resolver {
+contract L2Resolver is IL2Resolver, IERC165 {
   /// @inheritdoc IL2Resolver
   bytes32 public constant REVERSE_LOOKUP_NODE = bytes32(keccak256('reverse.chain.id.eip7930'));
 
@@ -47,4 +49,9 @@ contract L2Resolver is IL2Resolver {
     REVERSE_ADMIN = _reverseAdmin;
     PARENT_NODE = _parentNode;
   }
+
+  /// @inheritdoc IERC165
+  function supportsInterface(bytes4 _interfaceId) public view virtual override returns (bool _isSupported) {
+    _isSupported = _interfaceId == type(IERC165).interfaceId || _interfaceId == type(IExtendedResolver).interfaceId;
+  }
 }

src/interfaces/IExtendedResolver.sol

@@ -0,0 +1,12 @@
+// SPDX-License-Identifier: MIT
+pragma solidity 0.8.30;
+
+interface IExtendedResolver {
+  /**
+   * @notice Provides a mechanism to support wildcard resolution of ENS names
+   * @param _name The name to resolve
+   * @param _data The data to resolve
+   * @return _result The result of the resolution
+   */
+  function resolve(bytes memory _name, bytes memory _data) external view returns (bytes memory _result);
+}

yarn.lock

@@ -202,6 +202,11 @@
     "@nodelib/fs.scandir" "2.1.5"
     fastq "^1.6.0"
 
+"@openzeppelin/contracts@5.4.0":
+  version "5.4.0"
+  resolved "https://registry.yarnpkg.com/@openzeppelin/contracts/-/contracts-5.4.0.tgz#177594bdb2d86c71f5d1052fe40cb4edb95fb20f"
+  integrity sha512-eCYgWnLg6WO+X52I16TZt8uEjbtdkgLC0SUX/xnAksjjrQI4Xfn4iBRoI5j55dmlOhDv1Y7BoR3cU7e3WWhC6A==
+
 "@solidity-parser/parser@^0.19.0":
   version "0.19.0"
   resolved "https://registry.yarnpkg.com/@solidity-parser/parser/-/parser-0.19.0.tgz#37a8983b2725af9b14ff8c4a475fa0e98d773c3f"