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47 lines
1.7 KiB
47 lines
1.7 KiB
7 years ago
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const namehash = require('eth-ens-namehash')
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const multihash = require('multihashes')
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const REGISTRAR_ENS_MAIN_NET = "0x314159265dd8dbb310642f98f50c066173c1259b"
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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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// provider need mainnet
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let eth = new Eth(new HttpProvider(provider.rpcTarget))
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let hash = namehash.hash(name)
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let contract = new EthContract(eth)
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let Registrar = contract(registrarAbi).at(REGISTRAR_ENS_MAIN_NET)
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return new Promise((resolve, reject) => {
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if (provider.type !== "mainnet") reject('no_mainnet')
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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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let 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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let hex = contentHash["0"].substring(2)
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let 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('fisk')
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}
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})
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})
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}
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module.exports.resolve = function (name, provider) {
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let path = name.split(".");
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let tld = path[path.length - 1];
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if (tld === 'eth') {
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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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