1 files changed, 46 insertions, 0 deletions
diff --git a/app/scripts/lib/resolver.js b/app/scripts/lib/resolver.js
new file mode 100644
index 000000000..43ccec0cc
--- /dev/null
+++ b/app/scripts/lib/resolver.js
@@ -0,0 +1,46 @@
+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)
+    })
+  }
+}