July 2019
Beginner to intermediate
84 pages
1h 48m
English
book
Getting Started with Enterprise Blockchain
by Michael Bradley, David Gorman, Matt Lucas, Matthew Golby-Kirk
Content preview from Getting Started with Enterprise Blockchain
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Chapter 4. Developing a Blockchain Network
The previous chapters introduced blockchain concepts and helped you to identify when a scenario would be ideally solved by a blockchain solution. We also reviewed aspects of designing a blockchain network.
In this chapter, we look at the different aspects of developing the blockchain application using Hyperledger Fabric.
Smart Contracts
The first thing we will look at are smart contracts, which are a core part of developing a blockchain application.
Hyperledger Fabric has taken a generic approach to the languages used to write smart contracts. The first supported language was Go, which is also the language that Fabric itself is written in. Node.js and Java have been added in later versions. Hyperledger Burrow™ has also been added to Hyperledger Fabric, which adds languages such as Ethereum’s Solidity.
Although the industry uses and understands the generic term smart contract, Hyperledger Fabric actually refers to the installable unit as chaincode. We can think of smart contracts as being equivalent to chaincode.
In Hyperledger Fabric v1.4 a number of significant API changes were made. These improvements make it simpler to write smart contracts, allowing multiple associated contracts to be written in a single chaincode. This provides a one-to-many relationship between a chaincode and the smart contract(s) inside it, and gives the developer more flexibility to colocate smart contracts that are related. Other API changes were made to ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.