72 lines
2.2 KiB
JavaScript
72 lines
2.2 KiB
JavaScript
const namehash = require('eth-ens-namehash')
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const multihash = require('multihashes')
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const HttpProvider = require('ethjs-provider-http')
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const Eth = require('ethjs-query')
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const EthContract = require('ethjs-contract')
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const registrarAbi = require('./contracts/registrar')
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const resolverAbi = require('./contracts/resolver')
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function ens (name, provider) {
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const eth = new Eth(new HttpProvider(getProvider(provider.type)))
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const hash = namehash.hash(name)
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const contract = new EthContract(eth)
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const Registrar = contract(registrarAbi).at(getRegistrar(provider.type))
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return new Promise((resolve, reject) => {
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if (provider.type === 'mainnet' || provider.type === 'ropsten') {
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Registrar.resolver(hash).then((address) => {
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if (address === '0x0000000000000000000000000000000000000000') {
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reject(null)
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} else {
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const Resolver = contract(resolverAbi).at(address['0'])
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return Resolver.content(hash)
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}
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}).then((contentHash) => {
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if (contentHash['0'] === '0x0000000000000000000000000000000000000000000000000000000000000000') reject(null)
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if (contentHash.ret !== '0x') {
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const hex = contentHash['0'].substring(2)
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const buf = multihash.fromHexString(hex)
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resolve(multihash.toB58String(multihash.encode(buf, 'sha2-256')))
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} else {
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reject(null)
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}
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})
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} else {
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return reject('unsupport')
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}
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})
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}
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function getProvider (type) {
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switch (type) {
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case 'mainnet':
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return 'https://mainnet.infura.io/'
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case 'ropsten':
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return 'https://ropsten.infura.io/'
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default:
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return 'http://localhost:8545/'
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}
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}
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function getRegistrar (type) {
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switch (type) {
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case 'mainnet':
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return '0x314159265dd8dbb310642f98f50c066173c1259b'
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case 'ropsten':
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return '0x112234455c3a32fd11230c42e7bccd4a84e02010'
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default:
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return '0x0000000000000000000000000000000000000000'
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}
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}
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module.exports.resolve = function (name, provider) {
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const path = name.split('.')
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const topLevelDomain = path[path.length - 1]
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if (topLevelDomain === 'eth' || topLevelDomain === 'test') {
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return ens(name, provider)
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} else {
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return new Promise((resolve, reject) => {
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reject(null)
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})
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}
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}
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