CryptoJS

This package provides an easy-to-use interface to the Ethereum Name Service. Example usage: var ENS = require('ethereum-ens'); var Web3 = require('web3');

var web3 = new Web3();
var ens = new ENS(web3, '0x1234abc...');

var address = ens.resolver('foo.eth').addr();

Throughout this module, the same optionally-asynchronous pattern as web3 is used: all functions that call web3 take a callback as an optional last argument; if supplied, the function returns nothing, but instead calls the callback with (err, result) when the operation completes.

Functions that create transactions also take an optional 'options' argument; this has the same parameters as web3.

Meta

• author: Nick Johnson <nick@ethereum.org>
• license: LGPL

ENS

Constructs a new ENS instance.

Parameters

• web3 object A web3 instance to use to communicate with the blockchain.
• address address The address of the ENS registry.

resolver

resolver returns a resolver object for the specified name, throwing ENS.NameNotFound if the name does not exist in ENS. Resolver objects are wrappers around web3 contract objects, with the first argument - always the node ID in an ENS resolver - automatically supplied. So, to call the addr(node) function on a standard resolver, you only have to call addr().

Parameters

• name string The name to look up.
• abi list Optional. The JSON ABI definition to use for the resolver. if none is supplied, a default definition implementing has, addr and setAddr is supplied.
• callback function Optional. If specified, the function executes asynchronously.

Returns any The resolver object if callback is not supplied.

setResolver

setResolver sets the address of the resolver contract for the specified name. The calling account must be the owner of the name in order for this call to succeed.

Parameters

• name string The name to update
• address address The address of the resolver
• options object An optional dict of parameters to pass to web3.
• callback function An optional callback; if specified, the function executes asynchronously.
• addr

Returns any The transaction ID if callback is not supplied.

owner

owner returns the address of the owner of the specified name.

Parameters

• name string The name to look up.
• callback function An optional callback; if specified, the function executes asynchronously.

Returns any The resolved address if callback is not supplied.

setOwner

setOwner sets the owner of the specified name. Only the owner may call setResolver or setSubnodeOwner. The calling account must be the current owner of the name in order for this call to succeed.

Parameters

• name string The name to update
• address address The address of the new owner
• options object An optional dict of parameters to pass to web3.
• callback function An optional callback; if specified, the function executes asynchronously.
• addr

Returns any The transaction ID if callback is not supplied.

setSubnodeOwner

setSubnodeOwner sets the owner of the specified name. The calling account must be the owner of the parent name in order for this call to succeed - for example, to call setSubnodeOwner on 'foo.bar.eth', the caller must be the owner of 'bar.eth'.

Parameters

• name string The name to update
• address address The address of the new owner
• options object An optional dict of parameters to pass to web3.
• callback function An optional callback; if specified, the function executes asynchronously.
• addr

Returns any The transaction ID if callback is not supplied.

namehash

namehash implements ENS' name hash algorithm.

Parameters

• name string The name to hash

Returns any The computed namehash, as a hex string.