The Registry
The ENS registry is the core contract that lies at the heart of ENS resolution. All ENS lookups start by querying the registry. The registry maintains a list of domains, recording the owner, resolver, and TTL for each, and allows the owner of a domain to make changes to that data.
The ENS registry is specified in EIP 137.
Top-Level Domains (TLDs), like .eth, .com, and .test, are owned by smart contracts called registrars, which specify rules governing the allocation of their names.
Anyone may, by following the rules imposed by these registrar contracts, obtain ownership of a domain for their own use.
| TLD | Registrar Contract |
|---|---|
[root] | The Registry |
.eth | ETH Registry |
.com, .xyz, etc | DNS Registrar |
.addr.reverse | Reverse Registrar |
The ENS Registry is owned by the ENS Root which is owned by the ENS DAO Wallet.
To verify this you can run the owner function on the registry & root contracts.
// Get Owner
ENS.owner(bytes32 node) view returns (address)
// Get Resolver
ENS.resolver(bytes32 node) view returns (address)
// Get TTL
ENS.ttl(bytes32 node) view returns (uint64)
// Get Approval
ENS.isApprovedForAll(address owner, address operator) view returns (bool)
// Check Record Existence
ENS.recordExists(bytes32 node) view returns (bool)
// Set Owner (only callable by current owner)
ENS.setOwner(bytes32 node, address owner)
// Set Resolver
ENS.setResolver(bytes32 node, address resolver)
// Set TTL
ENS.setTTL(bytes32 node, uint64 ttl)
// Set Subnode Owner
ENS.setSubnodeOwner(bytes32 node, bytes32 label, address owner)
// Set Multiple (convenience function (setResolver, setTTL, setOwner))
ENS.setRecord(bytes32 node, address owner, address resolver, uint64 ttl)
// Set Multiple Subnode
ENS.setSubnodeRecord(bytes32 node, bytes32 label, address owner, address resolver, uint64 ttl)
// Set Approval
ENS.setApprovalForAll(address operator, bool approved)
Events
// Transfer Event
event Transfer(bytes32 indexed node, address owner)
// New Resolver Event
event NewResolver(bytes32 indexed node, address resolver)
// New TTL Event
event NewTTL(bytes32 indexed node, uint64 ttl)
// New Owner Event
event NewOwner(bytes32 indexed node, bytes32 indexed label, address owner)