ENSSubdomainRegistrar
Description
This contract registers ENS subdomains under a parent domain specified in the initialization process and maintains ownership of the subdomain since only the resolver address is set. This contract must either be the domain node owner or an approved operator of the node owner. The default resolver being used is the one specified in the parent domain.
Implementation
public variable UPGRADE_REGISTRAR_PERMISSION_ID
The ID of the permission required to call the _authorizeUpgrade function.
bytes32 UPGRADE_REGISTRAR_PERMISSION_ID
public variable REGISTER_ENS_SUBDOMAIN_PERMISSION_ID
The ID of the permission required to call the registerSubnode and setDefaultResolver function.
bytes32 REGISTER_ENS_SUBDOMAIN_PERMISSION_ID
public variable ens
The ENS registry contract
contract ENS ens
public variable node
The namehash of the domain on which subdomains are registered.
bytes32 node
public variable resolver
The address of the ENS resolver resolving the names to an address.
address resolver
error AlreadyRegistered
Thrown if the subnode is already registered.
error AlreadyRegistered(bytes32 subnode, address nodeOwner)
| Input | Type | Description |
|---|---|---|
subnode | bytes32 | The subnode namehash. |
nodeOwner | address | The node owner address. |
error InvalidResolver
Thrown if node's resolver is invalid.
error InvalidResolver(bytes32 node, address resolver)
| Input | Type | Description |
|---|---|---|
node | bytes32 | The node namehash. |
resolver | address | The node resolver address. |
public function constructor
constructor() public
Used to disallow initializing the implementation contract by an attacker for extra safety.
external function initialize
Initializes the component by
- checking that the contract is the domain node owner or an approved operator
- initializing the underlying component
- registering the ERC-165 interface ID
- setting the ENS contract, the domain node hash, and resolver.
function initialize(contract IDAO _managingDao, contract ENS _ens, bytes32 _node) external
| Input | Type | Description |
|---|---|---|
_managingDao | contract IDAO | The interface of the DAO managing the components permissions. |
_ens | contract ENS | The interface of the ENS registry to be used. |
_node | bytes32 | The ENS parent domain node under which the subdomains are to be registered. |
internal function _authorizeUpgrade
Internal method authorizing the upgrade of the contract via the upgradeability mechanism for UUPS proxies (see ERC-1822).
function _authorizeUpgrade(address) internal virtual
The caller must have the UPGRADE_REGISTRAR_PERMISSION_ID permission.
external function registerSubnode
Registers a new subdomain with this registrar as the owner and set the target address in the resolver.
function registerSubnode(bytes32 _label, address _targetAddress) external
| Input | Type | Description |
|---|---|---|
_label | bytes32 | The labelhash of the subdomain name. |
_targetAddress | address | The address to which the subdomain resolves. |
It reverts with no message if this contract isn't the owner nor an approved operator for the given node.
external function setDefaultResolver
Sets the default resolver contract address that the subdomains being registered will use.
function setDefaultResolver(address _resolver) external
| Input | Type | Description |
|---|---|---|
_resolver | address | The resolver contract to be used. |
