Web3 in Truffle

Now that we have a clear understanding of web3 in an isolated environment, it's time to get out of our comfort zone and see how it interacts with Truffle. We've already seen a bit of this in Chapter 1, Truffle for Decentralized Applications.

Let's refer back to our app.js file under chapter1/app/javascripts/ (https://github.com/PacktPublishing/Truffle-Quick-Start-Guide/blob/master/chapter1/app/javascripts/app.js). Let's see how we import web3:

import { defaultasWeb3} from'web3';

Now, let's see how we set the blockchain network provider for web3:

window.web3 = new Web3(new Web3.providers.HttpProvider("http://127.0.0.1:9545"));

Remember how we simply glossed over this in Chapter 1, Truffle for Decentralized Applications? Hopefully, you now have a better understanding of what's going on here. Since we don't have MetaMask or Mist installed in our browser (you may, but it's not needed), we simply fallback to our local blockchain.

Now, let's see how we got all of the accounts inside...