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  • Book Overview & Buying Building Blockchain Projects
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Building Blockchain Projects

Building Blockchain Projects

By : Narayan Prusty
3.8 (20)
Buy this Book
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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)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
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1
Understanding Decentralized Applications
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Understanding Decentralized Applications
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What is a DApp?
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Decentralized autonomous organization
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User identity in DApps
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User accounts in DApps
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Accessing the centralized apps
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Internal currency in DApps
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What are permissioned DApps?
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Popular DApps
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Summary
2
Understanding How Ethereum Works
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Understanding How Ethereum Works
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Overview of Ethereum
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Ethereum accounts
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Transactions
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Consensus
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Timestamp
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Nonce
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Block time
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Forking
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Genesis block
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Ether denominations
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Ethereum virtual machine
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Gas
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Peer discovery
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Whisper and Swarm
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Geth
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Ethereum Wallet
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Mist
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Weaknesses
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Serenity
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Summary
3
Writing Smart Contracts
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Writing Smart Contracts
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Solidity source files
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The structure of a smart contract
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Data location
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What are the different data types?
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Control structures
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Creating contracts using the new operator
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Exceptions
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External function calls
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Features of contracts
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Libraries
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Returning multiple values
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Importing other Solidity source files
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Globally available variables
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Ether units
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Proof of existence, integrity, and ownership contract
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Compiling and deploying contracts
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Summary
4
Getting Started with web3.js
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Getting Started with web3.js
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Introduction to web3.js
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Building a client for an ownership contract
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Summary
5
Building a Wallet Service
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Building a Wallet Service
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Difference between online and offline wallets
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hooked-web3-provider and ethereumjs-tx libraries
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What is a hierarchical deterministic wallet?
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Introduction to key derivation functions
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Introduction to LightWallet
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Building a wallet service
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Summary
6
Building a Smart Contract Deployment Platform
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Building a Smart Contract Deployment Platform
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Calculating a transaction's nonce
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Introducing solcjs
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Building a contract deployment platform
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Summary
7
Building a Betting App
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Building a Betting App
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Introduction to Oraclize
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Working with strings
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Building the betting contract
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Building a client for the betting contract
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Summary
8
Building Enterprise Level Smart Contracts
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Building Enterprise Level Smart Contracts
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Exploring ethereumjs-testrpc
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What are event topics?
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Getting started with truffle-contract
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Introduction to truffle
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Summary
9
Building a Consortium Blockchain
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Building a Consortium Blockchain
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What is a consortium blockchain?
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What is Proof-of-Authority consensus?
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Introduction to parity
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Summary

Transactions

A transaction is a signed data package to transfer ether from an account to another account or to a contract, invoke methods of a contract, or deploy a new contract. A transaction is signed using ECDSA (Elliptic Curve Digital Signature Algorithm), which is a digital signature algorithm based on ECC. A transaction contains the recipient of the message, a signature identifying the sender and proving their intention, the amount of ether to transfer, the maximum number of computational steps the transaction execution is allowed to take (called the gas limit), and the cost the sender of the transaction is willing to pay for each computational step (called the gas price). If the transaction's intention is to invoke a method of a contract, it also contains input data, or if its intention is to deploy a contract, then it can contain the initialization code. The product of gas used and gas price is called transaction fees. To send ether or to execute a contract method, you need to broadcast...

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Building Blockchain Projects
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