feat(world): add renounceOwnership function

packages/world/gas-report.json

@@ -63,7 +63,7 @@
     "file": "test/Factories.t.sol",
     "test": "testWorldFactory",
     "name": "deploy world via WorldFactory",
-    "gasUsed": 12514303
+    "gasUsed": 12579230
   },
   {
     "file": "test/World.t.sol",

packages/world/src/modules/core/CoreModule.sol

@@ -140,11 +140,12 @@ contract CoreModule is Module {
    * @dev Iterates through known function signatures and registers them.
    */
   function _registerFunctionSelectors() internal {
-    string[3] memory functionSignaturesAccessManagement = [
+    string[4] memory functionSignaturesAccessManagement = [
       // --- AccessManagementSystem ---
       "grantAccess(bytes32,address)",
       "revokeAccess(bytes32,address)",
-      "transferOwnership(bytes32,address)"
+      "transferOwnership(bytes32,address)",
+      "renounceOwnership(bytes32)"
     ];
     for (uint256 i = 0; i < functionSignaturesAccessManagement.length; i++) {
       _registerRootFunctionSelector(ACCESS_MANAGEMENT_SYSTEM_ID, functionSignaturesAccessManagement[i]);

packages/world/src/modules/core/implementations/AccessManagementSystem.sol

@@ -59,4 +59,20 @@ contract AccessManagementSystem is System {
     // Grant access to new owner
     ResourceAccess._set(namespaceId, newOwner, true);
   }
+
+  /**
+   * @notice Renounces ownership of the given namespace
+   * @dev Requires the caller to own the namespace. Revoke ResourceAccess for previous owner
+   * @param namespaceId The ID of the namespace to transfer ownership.
+   */
+  function renounceOwnership(ResourceId namespaceId) public virtual {
+    // Require the caller to own the namespace
+    AccessControl.requireOwner(namespaceId, _msgSender());
+
+    // Delete namespace owner
+    NamespaceOwner._deleteRecord(namespaceId);
+
+    // Revoke access from old owner
+    ResourceAccess._deleteRecord(namespaceId, _msgSender());
+  }
 }

packages/world/test/World.t.sol

@@ -225,11 +225,12 @@ contract WorldTest is Test, GasReporter {
     CoreRegistrationSystem coreRegistrationSystem = CoreRegistrationSystem(
       Systems.getSystem(CORE_REGISTRATION_SYSTEM_ID)
     );
-    bytes4[19] memory coreFunctionSignatures = [
+    bytes4[20] memory coreFunctionSignatures = [
       // --- AccessManagementSystem ---
       AccessManagementSystem.grantAccess.selector,
       AccessManagementSystem.revokeAccess.selector,
       AccessManagementSystem.transferOwnership.selector,
+      AccessManagementSystem.renounceOwnership.selector,
       // --- BalanceTransferSystem ---
       BalanceTransferSystem.transferBalanceToNamespace.selector,
       BalanceTransferSystem.transferBalanceToAddress.selector,
@@ -426,6 +427,31 @@ contract WorldTest is Test, GasReporter {
     world.transferOwnership(namespaceId, address(1));
   }
 
+  function testRenounceNamespace() public {
+    bytes14 namespace = "testRenounce";
+    ResourceId namespaceId = WorldResourceIdLib.encodeNamespace(namespace);
+
+    world.registerNamespace(namespaceId);
+
+    // Expect the new owner to not be namespace owner before transfer
+    assertFalse(
+      (NamespaceOwner.get(namespaceId)) == address(0),
+      "new owner should not be namespace owner before transfer"
+    );
+
+    world.renounceOwnership(namespaceId);
+
+    // Expect the new owner to be zero address
+    assertEq(NamespaceOwner.get(namespaceId), address(0), "zero address should be namespace owner");
+
+    // Expect previous owner to no longer have access
+    assertEq(ResourceAccess.get(namespaceId, address(this)), false, "caller should no longer have access");
+
+    // Expect revert if caller is not the owner
+    _expectAccessDenied(address(this), namespace, 0, RESOURCE_NAMESPACE);
+    world.renounceOwnership(namespaceId);
+  }
+
   function testRegisterTable() public {
     FieldLayout fieldLayout = FieldLayoutEncodeHelper.encode(1, 32, 1);
     Schema valueSchema = SchemaEncodeHelper.encode(SchemaType.BOOL, SchemaType.UINT256, SchemaType.STRING);