Browse Library
Sign In Start Free Trial
Close icon Search icon
Account
Browse Library Advanced Search Sign In Start Free Trial

Add to playlist

Create a Playlist

Modal Close icon
You need to login to use this feature.
  • Book Overview & Buying Building Blockchain Projects
  • Table Of Contents Toc
  • Feedback & Rating feedback
Building Blockchain Projects

Building Blockchain Projects

By : Narayan Prusty
3.8 (20)
Buy this Book
close
close
Building Blockchain Projects

Building Blockchain Projects

3.8 (20)
By: Narayan Prusty
Buy this Book

Overview of this book

Blockchain is a decentralized ledger that maintains a continuously growing list of data records that are secured from tampering and revision. Every user is allowed to connect to the network, send new transactions to it, verify transactions, and create new blocks, making it permission-less. This book will teach you what blockchain is, how it maintains data integrity, and how to create real-world blockchain projects using Ethereum. With interesting real-world projects, you will learn how to write smart contracts which run exactly as programmed without any chance of fraud, censorship, or third-party interference, and build end-to-e applications for blockchain. You will learn about concepts such as cryptography in cryptocurrencies, ether security, mining, smart contracts, solidity, and more. You will also learn about web sockets, various API services for Ethereum, and much more. The blockchain is the main technical innovation of bitcoin, where it serves as the public ledger for bitcoin transactions.
Table of Contents (10 chapters)
close
close
close
Preface
Icon
Preface
Icon
What this book covers
Icon
What you need for this book
Icon
Who this book is for
Icon
Conventions
Icon
Reader feedback
Icon
Customer support
Lock Free Chapter
1
Understanding Decentralized Applications
Icon
Understanding Decentralized Applications
Icon
What is a DApp?
Icon
Decentralized autonomous organization
Icon
User identity in DApps
Icon
User accounts in DApps
Icon
Accessing the centralized apps
Icon
Internal currency in DApps
Icon
What are permissioned DApps?
Icon
Popular DApps
Icon
Summary
2
Understanding How Ethereum Works
Icon
Understanding How Ethereum Works
Icon
Overview of Ethereum
Icon
Ethereum accounts
Icon
Transactions
Icon
Consensus
Icon
Timestamp
Icon
Nonce
Icon
Block time
Icon
Forking
Icon
Genesis block
Icon
Ether denominations
Icon
Ethereum virtual machine
Icon
Gas
Icon
Peer discovery
Icon
Whisper and Swarm
Icon
Geth
Icon
Ethereum Wallet
Icon
Mist
Icon
Weaknesses
Icon
Serenity
Icon
Summary
3
Writing Smart Contracts
Icon
Writing Smart Contracts
Icon
Solidity source files
Icon
The structure of a smart contract
Icon
Data location
Icon
What are the different data types?
Icon
Control structures
Icon
Creating contracts using the new operator
Icon
Exceptions
Icon
External function calls
Icon
Features of contracts
Icon
Libraries
Icon
Returning multiple values
Icon
Importing other Solidity source files
Icon
Globally available variables
Icon
Ether units
Icon
Proof of existence, integrity, and ownership contract
Icon
Compiling and deploying contracts
Icon
Summary
4
Getting Started with web3.js
Icon
Getting Started with web3.js
Icon
Introduction to web3.js
Icon
Building a client for an ownership contract
Icon
Summary
5
Building a Wallet Service
Icon
Building a Wallet Service
Icon
Difference between online and offline wallets
Icon
hooked-web3-provider and ethereumjs-tx libraries
Icon
What is a hierarchical deterministic wallet?
Icon
Introduction to key derivation functions
Icon
Introduction to LightWallet
Icon
Building a wallet service
Icon
Summary
6
Building a Smart Contract Deployment Platform
Icon
Building a Smart Contract Deployment Platform
Icon
Calculating a transaction's nonce
Icon
Introducing solcjs
Icon
Building a contract deployment platform
Icon
Summary
7
Building a Betting App
chevron up
Icon
Building a Betting App
Icon
Introduction to Oraclize
Icon
Working with strings
Icon
Building the betting contract
Icon
Building a client for the betting contract
Icon
Summary
8
Building Enterprise Level Smart Contracts
Icon
Building Enterprise Level Smart Contracts
Icon
Exploring ethereumjs-testrpc
Icon
What are event topics?
Icon
Getting started with truffle-contract
Icon
Introduction to truffle
Icon
Summary
9
Building a Consortium Blockchain
Icon
Building a Consortium Blockchain
Icon
What is a consortium blockchain?
Icon
What is Proof-of-Authority consensus?
Icon
Introduction to parity
Icon
Summary

Introduction to Oraclize

Oraclize is a service that aims to enable smart contracts to access data from other blockchains and the World Wide Web. This service is currently live on bitcoin and Ethereum's testnet and mainnet. What makes Oraclize so special is that you don't need to trust it because it provides proof of authenticity of all data it provides to smart contracts.

In this chapter, our aim is to learn how Ethereum smart contracts can use the Oraclize service to fetch data from the World Wide Web.

How does it work?

Let's look at the process by which an Ethereum smart contract can fetch data from other blockchains and the World Wide Web using Oraclize.

To fetch data that exists outside of the Ethereum blockchain, an Ethereum smart contract needs to send a query to Oraclize, mentioning the data source (representing where to fetch the data from) and the input for the data source (representing what to fetch).

Sending a query to Oraclize Oraclize means sending a contract call (that is, an internal...

Visually different images
CONTINUE READING
83
Tech Concepts
36
Programming languages
73
Tech Tools
Icon Unlimited access to the largest independent learning library in tech of over 8,000 expert-authored tech books and videos.
Icon Innovative learning tools, including AI book assistants, code context explainers, and text-to-speech.
Icon 50+ new titles added per month and exclusive early access to books as they are being written.
Building Blockchain Projects
End of Section 7
Next Section
notes
bookmark Notes and Bookmarks search Search in title playlist Add to playlist download Download options
font-size Font size

Change the font size

margin-width Margin width

Change margin width

day-mode Day/Sepia/Night Modes

Change background colour

Close icon Search
Country selected
Close icon Your notes and bookmarks

Confirmation

Modal Close icon
claim successful
Order Page Read Now

Buy this book with your credits?

Modal Close icon
Are you sure you want to buy this book with one of your credits?
Close
YES, BUY

Submit Your Feedback

Modal Close icon
Modal Close icon
Modal Close icon