Book Image

Blockchain Developer's Guide

By : Brenn Hill, Samanyu Chopra, Paul Valencourt, Narayan Prusty
Book Image

Blockchain Developer's Guide

By: Brenn Hill, Samanyu Chopra, Paul Valencourt, Narayan Prusty

Overview of this book

Blockchain applications provide a single-shared ledger to eliminate trust issues involving multiple stakeholders. It is the main technical innovation of Bitcoin, where it serves as the public ledger for Bitcoin transactions. Blockchain Developer's Guide takes you through the electrifying world of blockchain technology. It begins with the basic design of a blockchain and elaborates concepts, such as Initial Coin Offerings (ICOs), tokens, smart contracts, and other related terminologies. You will then explore the components of Ethereum, such as Ether tokens, transactions, and smart contracts that you need to build simple DApps. Blockchain Developer's Guide also explains why you must specifically use Solidity for Ethereum-based projects and lets you explore different blockchains with easy-to-follow examples. You will learn a wide range of concepts - beginning with cryptography in cryptocurrencies and including ether security, mining, and smart contracts. You will learn how to use web sockets and various API services for Ethereum. By the end of this Learning Path, you will be able to build efficient decentralized applications. This Learning Path includes content from the following Packt products: • Blockchain Quick Reference by Brenn Hill, Samanyu Chopra, Paul Valencourt • Building Blockchain Projects by Narayan Prusty
Table of Contents (37 chapters)
Title Page
About Packt

Chapter 27. Building a Smart Contract Deployment Platform

Some clients may need to compile and deploy contracts at runtime. In our proof-of-ownership DApp, we deployed the smart contract manually and hardcoded the contract address in the client-side code. But some clients may need to deploy smart contracts at runtime. For example, if a client lets schools record students' attendance in the blockchain, then it will need to deploy a smart contract every time a new school is registered so that each school has complete control over their smart contract. In this chapter, we will learn how to compile smart contracts using web3.js and deploy it using web3.js and EthereumJS.

In this chapter, we'll cover the following topics:

  • Calculating the nonce of a transaction
  • Using the transaction pool JSON-RPC API
  • Generating data of a transaction for contract creation and method invocation
  • Estimating the gas required by a transaction
  • Finding the current spendable balance of an account
  • Compiling smart contracts using...