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const namehash = require('eth-ens-namehash')
const multihash = require('multihashes')
const REGISTRAR_ENS_MAIN_NET = "0x314159265dd8dbb310642f98f50c066173c1259b"
const HttpProvider = require('ethjs-provider-http')
const Eth = require('ethjs-query')
const EthContract = require('ethjs-contract')
const registrarAbi = require('./contracts/registrar')
const resolverAbi = require('./contracts/resolver')
function ens(name, provider) {
// provider need mainnet
let eth = new Eth(new HttpProvider(provider.rpcTarget))
let hash = namehash.hash(name)
let contract = new EthContract(eth)
let Registrar = contract(registrarAbi).at(REGISTRAR_ENS_MAIN_NET)
return new Promise((resolve, reject) => {
if (provider.type !== "mainnet") reject('no_mainnet')
Registrar.resolver(hash).then((address) => {
if (address === '0x0000000000000000000000000000000000000000') {
reject(null)
} else {
let Resolver = contract(resolverAbi).at(address["0"])
return Resolver.content(hash)
}
}).then((contentHash) => {
if (contentHash["0"] === '0x0000000000000000000000000000000000000000000000000000000000000000') reject(null)
if (contentHash.ret !== "0x") {
let hex = contentHash["0"].substring(2)
let buf = multihash.fromHexString(hex)
resolve(multihash.toB58String(multihash.encode(buf, 'sha2-256')))
} else {
reject('fisk')
}
})
})
}
module.exports.resolve = function (name, provider) {
let path = name.split(".");
let tld = path[path.length - 1];
if (tld === 'eth') {
return ens(name, provider);
} else {
return new Promise((resolve, reject) => {
reject(null)
})
}
}
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