The core contract of ENS, the registry holds the data of all domain names.


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-Controller
-Label
-Name
-Namehash
-Node
-Registrar
-Registration
-Registrant
-Registry


ENS Terminology

Ethereum Name Service (ENS)

The account that can change the records of a name. The Controller may be changed by the Registrant or Controller.


Controller

An individual component of a name, such as 'alice'.


Label

An ENS identifier such as 'alice.eth'. Names may consist of multiple parts, called labels, separated by dots.


Name

The algorithm used to process an ENS name and return a cryptographic hash uniquely identifying that name. 

Namehash

A cryptographic hash uniquely identifying a name.


Node

 A registrar is a contract responsible for allocating subdomains. Registrars can be configured at any level of ENS, and are pointed to by the owner field of the registry.


Registrar

A registration is a registrar's record of a user's ownership of a name. This is distinct from the owner field in the Registry; registrations are maintained in the registrar contract and additionally store information on expiry date, fees paid, etc.


Registration

The owner of a registration. The registrant may transfer the registration, set the Controller, and reclaim ownership of the name in the registry if required.


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