Book Image

Blockchain across Oracle

By : Robert van Molken
Book Image

Blockchain across Oracle

By: Robert van Molken

Overview of this book

Blockchain across Oracle gives you the professional orientation to Blockchain that you need as an Oracle developer in today’s changing world. Written and prepared for you by Oracle Developer Champion Robert van Mölken, this book gets you up to speed with the details of the Blockchain - core concepts, how to implement Oracle’s Blockchain Cloud Service, industry implications for the Blockchain, and how the Blockchain will affect your Oracle customers. Robert van Mölken introduces you to the history and concepts of the Blockchain. You’ll really get to understand the Blockchain inside and out, as an Oracle developer or solution architect. You’ll understand the Blockchain flow, and how the hashes and chains create a new decentralised paradigm for you as an Oracle developer. You’ll gain insights into how the Blockchain affects Oracle developers and customers in this modern and disruptive era. You’ll see how the Blockchain concepts work in this new world where Assets, Transactions, Security, and Privacy, can all be sustained across a decentralized system for your customers. Then you'll find a detailed look at the cutting-edge Oracle middleware solutions. You’ll learn about Hyperledger Fabric, the opensource Blockchain framework used by Oracle as its core, and how to set up your own Oracle Blockchain Network. You’ll design and develop a smart contract, and learn how to run it on the Oracle Blockchain Cloud Service. The final part of the book looks at how the Blockchain will affect your customers across various industry sectors. By studying industry trends in the financial services sector, healthcare industry, and the transport industry, you’ll discover how the options and possibilities for you and your clients are being transformed by the Blockchain across Oracle. You’ll complete this professional orientation by looking at Blockchain trends and future directions.
Table of Contents (24 chapters)
Title Page
Packt Upsell
Contributors
Preface
3
Blockchain 101 - Assets, Transactions, and Hashes
4
Blockchain 101 - Blocks, Chains, and Consensus
Index

Chains


Up to this point, you learned that the assets that are transferred between entities are recorded in transactions and that transactions persist in append-only blocks. When a block is finalized, the block header that was created is added to the block that includes the nonce and the hash of the previous block, linking the two. The new block is identified with its own hash or blockId, and is used by the subsequent block, again linking the two.

 

Blockchain

The word blockchain, originally called block chain, is derived from the link between blocks. Because the hash of one block is based on the hash of the previous block, it is like a chain linking all the way back to the first, or genesis, block. This process confirms the integrity of the previous blocks in the chain. The following diagram shows how blocks are linked together using the previous block hash:

Every block is linked to its previous block through the block hash. The generated hash of a new block uses the hash of the previous block...