Add JS wrapper for kredits kit

This makes it easier to deploy new DAOs and the deploy script is less
dependent on truffle

lib/abis/KreditsKit.json

@@ -0,0 +1 @@
+[{"constant":true,"inputs":[],"name":"ens","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"fac","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"appId","type":"bytes32"}],"name":"latestVersionAppBase","outputs":[{"name":"base","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"","type":"uint256"}],"name":"appIds","outputs":[{"name":"","type":"bytes32"}],"payable":false,"stateMutability":"view","type":"function"},{"inputs":[{"name":"_fac","type":"address"},{"name":"_ens","type":"address"},{"name":"_appIds","type":"bytes32[4]"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"name":"dao","type":"address"}],"name":"DeployInstance","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"dao","type":"address"},{"indexed":false,"name":"appProxy","type":"address"},{"indexed":false,"name":"appId","type":"bytes32"}],"name":"InstalledApp","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"appProxy","type":"address"},{"indexed":false,"name":"appId","type":"bytes32"}],"name":"InstalledApp","type":"event"},{"constant":false,"inputs":[],"name":"newInstance","outputs":[{"name":"dao","type":"address"}],"payable":false,"stateMutability":"nonpayable","type":"function"}]

lib/kreditskit.js

@@ -0,0 +1,49 @@
+const ethers = require('ethers');
+
+const ABI = require('./abis/KreditsKit.json');
+const Addresses = require('./addresses/KreditsKit.json');
+
+class KreditsKit {
+
+  constructor(provider, signer, options = {}) {
+    let { address, abi, ipfsConfig } = options;
+
+    this.provider = provider;
+    this.signer = signer;
+    this.options = options;
+    this.address = address
+    this.abi = abi || ABI;
+  }
+
+  init() {
+    return this.provider.getNetwork().then((network) => {
+      this.address = this.address || Addresses[network.chainId.toString()];
+      this.contract = new ethers.Contract(
+        this.address,
+        this.abi,
+        (this.signer || this.provider)
+      );
+      return this;
+    });
+  }
+
+  appIdFor(contractName) {
+    // see appIds in KreditsKit.sol for more details
+    const knownContracts = ['Contribution', 'Contributor', 'Proposal', 'Token'];
+    return this.contract.functions.appIds(knownContracts.indexOf(contractName));
+  }
+
+  newDAO(options = {}) {
+    return this.contract.functions.newInstance(options).then(transaction => {
+      return transaction.wait().then(result => {
+        const deployEvent = result.events.find(e => e.event === 'DeployInstance');
+        return {
+          daoAddress: deployEvent.args.dao,
+          transactionHash: transaction.hash
+        }
+      });
+    });
+  }
+}
+
+module.exports = KreditsKit;

scripts/new-dao.js

@@ -1,13 +1,13 @@
 const fs = require('fs');
 const path = require('path');
 
+const ethers = require('ethers');
 const fileInject = require('./helpers/file_inject.js');
 const getNetworkId = require('./helpers/networkid.js');
+const KreditsKit = require('../lib/kreditskit');
 
 const addressesPath = path.join(__dirname, '..', 'lib/addresses');
 
-const KreditsKit = artifacts.require('KreditsKit')
-
 module.exports = async function(callback) {
   const networkId = await getNetworkId(web3)
   console.log(`Deploying to networkId: ${networkId}`)
@@ -20,25 +20,21 @@ module.exports = async function(callback) {
   }
   console.log(`Using KreditsKit at: ${kreditsKitAddress}`);
 
-  let kreditsKit = KreditsKit.at(kreditsKitAddress)
+  const provider = new ethers.providers.Web3Provider(web3.currentProvider);
+  let signer = provider.getSigner();
 
-  kreditsKit.newInstance().then((ret) => {
-    console.log(ret.logs);
-    const installedEvents = ret.logs.filter(log => log.event === 'InstalledApp').map(log => log.args)
-    const deployEvents = ret.logs.filter(log => log.event === 'DeployInstance').map(log => log.args)
+  let kit = await new KreditsKit(provider, signer).init()
 
-    if (deployEvents.length > 1) {
-      callback(new Error("More than one DAO was deployed. Something is wrong"))
-    }
-    const daoAddress = deployEvents[0].dao;
+  // TODO: get rid of the hard coded gas limit
+  kit.newDAO({ gasLimit: 10000000 }).then(result => {
+    console.log(result);
+    fileInject(path.join(addressesPath, 'dao.json'), networkId, result.daoAddress)
 
-    fileInject(path.join(addressesPath, 'dao.json'), networkId, daoAddress)
-
-    console.log(`\n\nCreated new DAO at: ${daoAddress}`)
+    console.log(`\n\nCreated new DAO at: ${result.daoAddress}`)
 
     callback();
   }).catch((err) => {
-    console.log('failed to create a new instance')
+    console.log('failed to create a new DAO')
     callback(err)
   })
 }