Change Goerli test contract to register new subdomains via it

src/interfaces/IENSRegistry.sol

@@ -5,6 +5,10 @@ pragma solidity ^0.8.19;
 interface IENSRegistry {
     function setSubnodeOwner(bytes32 node, bytes32 label, address owner) external returns (bytes32);
 
+    function setSubnodeRecord(bytes32 node, bytes32 label, address owner, address resolver, uint64 ttl) external;
+
+    function resolver(bytes32 node) external view returns (address);
+
     function setOwner(bytes32 node, address owner) external;
 
     function owner(bytes32 node) external view returns (address);

test/ENSNamehash.sol

@@ -0,0 +1,39 @@
+// SPDX-License-Identifier: MIT
+
+pragma solidity ^0.8.19;
+
+/*
+ * @dev Solidity implementation of the ENS namehash algorithm.
+ *
+ * Warning! Does not normalize or validate names before hashing.
+ */
+library ENSNamehash {
+    function namehash(bytes memory domain) internal pure returns (bytes32) {
+        return namehash(domain, 0);
+    }
+
+    function namehash(bytes memory domain, uint256 i) internal pure returns (bytes32) {
+        if (domain.length <= i) {
+            return 0x0000000000000000000000000000000000000000000000000000000000000000;
+        }
+
+        uint256 len = LabelLength(domain, i);
+
+        return keccak256(abi.encodePacked(namehash(domain, i + len + 1), keccak(domain, i, len)));
+    }
+
+    function LabelLength(bytes memory domain, uint256 i) private pure returns (uint256) {
+        uint256 len;
+        while (i + len != domain.length && domain[i + len] != 0x2e) {
+            len++;
+        }
+        return len;
+    }
+
+    function keccak(bytes memory data, uint256 offset, uint256 len) private pure returns (bytes32 ret) {
+        require(offset + len <= data.length);
+        assembly {
+            ret := keccak256(add(add(data, 32), offset), len)
+        }
+    }
+}

test/GoerliENSTestProposal.sol

@@ -4,25 +4,72 @@ pragma solidity ^0.8.19;
 
 import { IENSResolver } from "@interfaces/IENSResolver.sol";
 import { IENSRegistry } from "@interfaces/IENSRegistry.sol";
+import { ENSNamehash } from "./ENSNamehash.sol";
 import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol";
 import { TornadoAddresses } from "@proprietary/TornadoAddresses.sol";
 
 contract GoerliTestProposal is Ownable, TornadoAddresses {
     address ensResolverAddress = 0xd7a4F6473f32aC2Af804B3686AE8F1932bC35750; // goerli ENS resolver
     address ensRegistryAddress = 0x00000000000C2E074eC69A0dFb2997BA6C7d2e1e;
-    bytes32 testNode = 0xa8f2228d0331c20e8d36b0bf33b102b5b8d8d416db25502b04e5b854d7a5c556; // tornadotest.eth on Goerli
+    string testDomain = "tornadotest.eth";
+    bytes32 testNode = calculateDomainNode(testDomain);
 
     IENSResolver ensResolver = IENSResolver(ensResolverAddress);
     IENSRegistry ensRegistry = IENSRegistry(ensRegistryAddress);
 
-    function changeNode(bytes32 newNode) public onlyOwner {
+    function transferDomainOwnership(address to) public onlyOwner {
+        _transferDomainOwnership(testNode, to);
+    }
+
+    function transferSubdomainOwnership(string memory domain, string memory subdomainLabel, address to) public onlyOwner {
+        _transferSubdomainOwnership(domain, subdomainLabel, to);
+    }
+
+    function registerSubname(string memory domain, string memory subdomainLabel) public onlyOwner {
+        bytes32 rootNode = calculateDomainNode(domain);
+        address rootResolver = ensRegistry.resolver(rootNode);
+        bytes32 subdomainLabelhash = calculateSubdomainLabelhash(subdomainLabel);
+
+        ensRegistry.setSubnodeRecord(rootNode, subdomainLabelhash, address(this), rootResolver, 0);
+    }
+
+    function _transferDomainOwnership(bytes32 domainNode, address to) private {
+        require(ensRegistry.owner(domainNode) == address(this), "This test contract must be an owner of domain");
+        ensRegistry.setOwner(domainNode, to);
+    }
+
+    function _transferSubdomainOwnership(string memory domain, string memory subdomainLabel, address to) private {
+        bytes32 rootNode = calculateDomainNode(domain);
+        bytes32 subdomainLabelhash = calculateSubdomainLabelhash(subdomainLabel);
+        bytes32 subdomainNode = keccak256(abi.encodePacked(rootNode, subdomainLabelhash));
+        require(ensRegistry.recordExists(subdomainNode), "Subdomain not registered");
+        require(ensRegistry.owner(rootNode) == address(this), "This test contract must be an owner of domain");
+
+        ensRegistry.setSubnodeOwner(rootNode, subdomainLabelhash, to);
+    }
+
+    function setNewDomain(string memory newDomain) public onlyOwner {
+        bytes32 newNode = ENSNamehash.namehash(bytes(newDomain));
         require(ensRegistry.recordExists(newNode), "Node doesn't exist");
         require(ensRegistry.owner(newNode) == address(this), "Contract is not an owner of new ENS name");
         transferDomainOwnership(owner());
 
+        testDomain = newDomain;
         testNode = newNode;
     }
 
+    function calculateDomainNode(string memory domain) internal pure returns (bytes32) {
+        return ENSNamehash.namehash(bytes(domain));
+    }
+
+    function calculateSubdomainLabelhash(string memory subdomainLabel) internal pure returns (bytes32) {
+        return keccak256(bytes(subdomainLabel));
+    }
+
+    function ownSubdomain(string memory domain, string memory subdomainLabel) public {
+        _transferSubdomainOwnership(domain, subdomainLabel, address(this));
+    }
+
     function setClassicUiIpfs() public {
         bytes memory classicUiIPFSContenthash = hex"e301017012208124caa06a8419371b1d2eab9180191727d1ce0c0832975362f77a679ce614b6";
 
@@ -47,11 +94,7 @@ contract GoerliTestProposal is Ownable, TornadoAddresses {
         ensResolver.setContenthash(testNode, docsIPFSContenthash);
     }
 
-    function setStakingAddress() public {
-        ensResolver.setAddr(testNode, stakingAddress);
-    }
-
-    function transferDomainOwnership(address to) public onlyOwner {
-        ensRegistry.setOwner(testNode, to);
+    function setStakingAddress(string memory domain) public {
+        ensResolver.setAddr(calculateDomainNode(domain), stakingAddress);
     }
 }