Qwiklabs – Getting Started with Blockchain on GCP using Hyperledger Fabric and Composer [GSP420]
Overview
Blockchain
A blockchain is a growing list of records, called blocks, which are linked using cryptography. Each block contains:
– a cryptographic hash of the previous block
– a timestamp
– transaction data (generally represented as a merkle tree root hash)
By design, a blockchain is resistant to modification of the data. It is “an open, distributed ledger that can record transactions between two parties efficiently and in a verifiable and permanent way”. For use as a distributed ledger, a blockchain is typically managed by a peer-to-peer network collectively adhering to a protocol for inter-node communication and validating new blocks. Once recorded, the data in any given block cannot be altered retroactively without alteration of all subsequent blocks, which requires consensus of the network majority. Although blockchain records are not unalterable, blockchains may be considered secure by design and exemplify a distributed computing system with high Byzantine fault tolerance. Decentralized consensus has therefore been claimed with a blockchain.
Hyperledger
Hyperledger is an open source collaborative effort created to advance cross-industry blockchain technologies. It is a global collaboration, hosted by The Linux Foundation, and includes leaders in finance, banking, Internet of Things, supply chains, manufacturing, and technology.
Hyperledger Composer
Hyperledger Composer is an extensive open development toolset and framework to make developing blockchain applications easier.
Hyperledger Composer can be used to rapidly develop use cases and deploy a blockchain solution in weeks rather than months. Hyperledger Composer allows you to model your business network and integrate existing systems and data with your blockchain applications. It supports the existing Hyperledger Fabric blockchain infrastructure and runtime, which supports pluggable blockchain consensus protocols to ensure that transactions are validated according to policy by the designated business network participants.
For an example of a business network in action; a realtor can quickly model their business network as such:
Assets: houses and listings
Participants: buyers and homeowners
Transactions: buying or selling houses, and creating and closing listings
In this lab, you will learn to use Hyperledger Composer to quickly model a business network containing assets, participants, and transactions related to them. Hyperledger Composer Playground provides a user interface for the configuration, deployment, and testing of a business network.
What you’ll learn
– How to deploy Hyperledger Fabric and Composer solution from Google Cloud Marketplace.
– How to deploy a new business network.
– How to use Hyperledger Composer Playground to configure and test the deployed business network by creating sample assets, participants, and transactions.
by Adrianus Yoga
linux foundation
