Hyperledger Composer – Refine and deploy your blockchain network

Blockchain is HOT

You can’t go many places these days without hearing about blockchain. It is a truly disruptive technology that will change the way people do business with each other. If you have wanted to learn more about Blockchain but think the barrier to entry is too high, I have good news: Hyperledger Composer. Yes, that’s the good news. Read on.

Wait, what the heck is Hyperledger Composer?

Hyperledger Composer is a set of tools that allows you to quickly build, test, and manage blockchain applications. One of several projects under the Hyperledger umbrella, Composer provides:

  • A Domain-Specific Language (DSL) called CTO that lets you model a blockchain network
  • A sandbox – called Playground – that lets you quickly prototype a blockchain application
  • A command line interface (CLI) for managing and interacting with blockchain applications
  • Security through the use of ACL-style permissions
  • Tools
  • Lots more!

Using Composer, you can quickly build, test, and then manage blockchain applications that run on the Hyperledger Fabric.

Composer lowers the bar to building Fabric applications. How? Composer provides a framework that includes many common features of production-quality blockchain applications like management and security. So you spend your time writing business logic, not infrastructure.

Now, before going any further, if you haven’t checked out Part 1 of this series, you should do that now.

How do I work with a real blockchain network?

In Part 1 of the tutorial series, I showed you about the CTO language, and how to model, deploy, and test a simple blockchain network application using Composer Playground.

Surely there’s more to it than that, right?

Of course. You’ll need tools in order to use Composer to work with real blockchain networks. Tools like:

  • Node.js
  • The Composer CLI
  • VSCode

What about unit testing your chaincode transactions? Composer has you covered. Through Cucumber steps written specifically for Composer, you can test every inch of your blockchain network (okay, maybe not every inch, but Cucumber is super-extensible).

How about a tutorial?

So, you’re convinced Composer is THE tool to use for building Hyperledger Fabric applications. Now what do you do? Sounds like you need a tutorial. Don’t worry, IBM developerWorks and I have you covered.

I’ve written a three part tutorial series on how to use Composer. When you’re finished with this tutorial series, you’ll be ready to build the next hot blockchain application. I talked about Part 1 of the series in a previous blog post. So be sure to check that out if you haven’t already.

In Part 2 of the series, called Hyperledger Composer Basics, Refine and deploy your blockchain network, available at IBM developerWorks, you’ll install the necessary tools to work with real Hyperledger Fabric applications running on your computer, including unit testing your chaincode using Cucumber. Part 2 is all about the development process for building blockchain applications. If you want to be a serious blockchain developer, you owe it to yourself to check it out.

How do I learn more?

Check out these links to learn more about Blockchain and Hyperledger Fabric and Composer:


Setup your Composer development environment:

Thanks for reading, and happy blockchaining!



One thought on “Hyperledger Composer – Refine and deploy your blockchain network

  1. Pingback: Hyperledger Composer – Using the Fabric – j steven perry, The Blog

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