embark-area-51/lib/modules/ens/embarkjs.js

const namehash = require('eth-ens-namehash');
/*global web3*/
let __embarkENS = {};

// registry interface for later
var registryInterface = [
  {
    "constant": true,
    "inputs": [
      {
        "name": "node",
        "type": "bytes32"
      }
    ],
    "name": "resolver",
    "outputs": [
      {
        "name": "",
        "type": "address"
      }
    ],
    "type": "function"
  },
  {
    "constant": true,
    "inputs": [
      {
        "name": "node",
        "type": "bytes32"
      }
    ],
    "name": "owner",
    "outputs": [
      {
        "name": "",
        "type": "address"
      }
    ],
    "type": "function"
  },
  {
    "constant": false,
    "inputs": [
      {
        "name": "node",
        "type": "bytes32"
      },
      {
        "name": "resolver",
        "type": "address"
      }
    ],
    "name": "setResolver",
    "outputs": [],
    "type": "function"
  },
  {
    "constant": false,
    "inputs": [
      {
        "name": "node",
        "type": "bytes32"
      },
      {
        "name": "label",
        "type": "bytes32"
      },
      {
        "name": "owner",
        "type": "address"
      }
    ],
    "name": "setSubnodeOwner",
    "outputs": [],
    "type": "function"
  },
  {
    "constant": false,
    "inputs": [
      {
        "name": "node",
        "type": "bytes32"
      },
      {
        "name": "owner",
        "type": "address"
      }
    ],
    "name": "setOwner",
    "outputs": [],
    "type": "function"
  }
];

var resolverInterface = [
  {
    "constant": true,
    "inputs": [
      {
        "name": "node",
        "type": "bytes32"
      }
    ],
    "name": "addr",
    "outputs": [
      {
        "name": "",
        "type": "address"
      }
    ],
    "type": "function"
  },
  {
    "constant": true,
    "inputs": [
      {
        "name": "node",
        "type": "bytes32"
      }
    ],
    "name": "content",
    "outputs": [
      {
        "name": "",
        "type": "bytes32"
      }
    ],
    "type": "function"
  },
  {
    "constant": true,
    "inputs": [
      {
        "name": "node",
        "type": "bytes32"
      }
    ],
    "name": "name",
    "outputs": [
      {
        "name": "",
        "type": "string"
      }
    ],
    "type": "function"
  },
  {
    "constant": true,
    "inputs": [
      {
        "name": "node",
        "type": "bytes32"
      },
      {
        "name": "kind",
        "type": "bytes32"
      }
    ],
    "name": "has",
    "outputs": [
      {
        "name": "",
        "type": "bool"
      }
    ],
    "type": "function"
  },
  {
    "constant": false,
    "inputs": [
      {
        "name": "node",
        "type": "bytes32"
      },
      {
        "name": "addr",
        "type": "address"
      }
    ],
    "name": "setAddr",
    "outputs": [],
    "type": "function"
  },
  {
    "constant": false,
    "inputs": [
      {
        "name": "node",
        "type": "bytes32"
      },
      {
        "name": "hash",
        "type": "bytes32"
      }
    ],
    "name": "setContent",
    "outputs": [],
    "type": "function"
  },
  {
    "constant": false,
    "inputs": [
      {
        "name": "node",
        "type": "bytes32"
      },
      {
        "name": "name",
        "type": "string"
      }
    ],
    "name": "setName",
    "outputs": [],
    "type": "function"
  },
  {
    "constant": true,
    "inputs": [
      {
        "name": "node",
        "type": "bytes32"
      },
      {
        "name": "contentType",
        "type": "uint256"
      }
    ],
    "name": "ABI",
    "outputs": [
      {
        "name": "",
        "type": "uint256"
      },
      {
        "name": "",
        "type": "bytes"
      }
    ],
    "payable": false,
    "type": "function"
  }
];

var registryAddresses = {
  // Mainnet
  "1": "0x314159265dd8dbb310642f98f50c066173c1259b",
  // Ropsten
  "3": "0x112234455c3a32fd11230c42e7bccd4a84e02010",
  // Rinkeby
  "4": "0xe7410170f87102DF0055eB195163A03B7F2Bff4A"
};

__embarkENS.setProvider = function () {
  const self = this;

  // get network id and then assign ENS contract based on that 
  self.ens = web3.eth.net.getId().then(id => {
    if (registryAddresses[id] !== undefined) {
      return new web3.eth.Contract(registryInterface, registryAddresses[id]);
    }
    // todo: deploy at this point
    return undefined;
  });  
};

__embarkENS.resolve = function(name) {
  const self = this;

  if (self.ens === undefined) return undefined;

  let node = namehash(name);
  
  self.ens.methods.resolver(node).call().then((resolverAddress) => {
    let resolverContract = new web3.eth.Contract(resolverInterface, resolverAddress);
    return resolverContract.methods.addr(node).call();
  }).then((addr) => {
    return addr;
  }).catch(err => err);
};

__embarkENS.NameNotFound = Error("ENS name not found");

__embarkENS.lookup = function(address) {
  const self = this;

  if (self.ens === undefined) return undefined;

  if(address.startsWith("0x"))
    address = address.slice(2);

  let node = namehash(address.toLowerCase() + ".addr.reverse")

  self.ens.methods.resolver(node).call().then((resolverAddress) => {
    let resolverContract = new web3.eth.Contract(resolverInterface, resolverAddress);
    return resolverContract.methods.name(node).call();
  }).then((name) => {
    return name;
  }).catch(err => err);
}