In this chapter, we learned DApp basics and we now understand the web3.js API. By running Ganache as our local Ethereum environment, we could use the Truffle development tool to create a crowdfunding project and write a DApp component. Finally, we deployed and launched the crowdfunding DApp. In the next chapter, we will start to explore the most popular enterprise blockchain—Hyperledger Fabric.
Summary
by Petr Novotny, Nitin Gaur, Luc Desrosiers, Salman A. Baset
Blockchain Development with Hyperledger
- Title Page
- Copyright
- About Packt
- Contributors
- Preface
- Blockchain - Enterprise and Industry Perspective
- Defining the terms – what is a blockchain?
- Four core building blocks of blockchain framworks
- Fundamentals of the secure transaction processing protocol
- Where blockchain technology has been and where it's going
- Industries putting blockchain technology to work
- Blockchain in the enterprise
- Enterprise design principles
- Business considerations for choosing a blockchain framework
- Technology considerations for choosing a blockchain framework
- Enterprise integration and designing for extensibility
- Other considerations
- Summary
- Exploring Hyperledger Fabric
- Setting the Stage with a Business Scenario
- Trading and letter of credit
- Business scenario and use case
- Setting up the development environment
- Network components' configuration files
- Launching a sample trade network
- Summary
- Designing a Data and Transaction Model with Golang
- Exposing Network Assets and Transactions
- Building a complete application
- The nature of a Hyperledger Fabric application
- Building the application
- Middleware – wrapping and driving the chaincode
- Installation of tools and dependencies
- Creating and running the middleware
- Network configuration
- Endorsement policy
- User records
- Client registration and enrollment
- Creating a channel
- Joining a channel
- Installation of chaincode
- Instantiation of chaincode
- Invoking the chaincode
- Querying the chaincode
- Completing the loop – subscribing to blockchain events
- Putting it all together
- User application – exporting the service and API
- Integration with existing systems and processes
- Summary
- Building a complete application
- Business Networks
- A busy world of purposeful activity
- Defining business networks
- Introducing participants
- Introducing assets
- Introducing transactions
- Change as a fundamental concept
- Transaction definition and instance
- Implicit and explicit transactions
- The importance of contracts
- Signatures
- Smart contracts for multi-party transaction processing
- Digital transaction processing
- Initiating transactions
- Transaction history
- Transaction streams
- Separating transactions into different business networks
- Transaction history and asset states
- A business network as a history of transactions
- Regulators and business networks
- Discussing events from the perspective of designing a business network using Composer
- Implementing a business network
- Summary
- A Business Network Example
- The letter of credit sample
- Installing the sample
- Running the sample
- Step 1 – preparing to request a letter of credit
- Step 2 – requesting a letter of credit
- Step 3 – importing bank approval
- Step 4 – exporting bank approval
- Step 5 – letter received by exporter
- Step 6 – shipment
- Step 7 – goods received
- Step 8 – payment
- Step 9 – closing the letter
- Step 10 – Bob receives payment
- Recapping the process
- Analyzing the letter of credit process
- A description of the business network
- A model of the business network
- Examining the live network
- Creating business network APIs
- Summary
- The letter of credit sample
- Agility in a Blockchain Network
- Life in a Blockchain Network
- Modifying or upgrading a Hyperledger Fabric application
- Fabric blockchain and application life cycle
- Channel configuration updates
- Prerequisites for adding a new organization to the network
- Generating network cryptographic material
- Generating channel artifacts
- Generating the configuration and network components in one operation
- Launching the network components for the new organization
- Updating the channel configuration
- Adding the new organization to the network
- Smart contract and policy updates
- Platform upgrades
- System monitoring and performance
- Summary
- Modifying or upgrading a Hyperledger Fabric application
- Governance, Necessary Evil of Regulated Industries
- Hyperledger Fabric Security
- Hyperledger Fabric design goals impacting security
- Hyperledger Fabric architecture 
- Network bootstrap and governance – the first step towards security
- Strong identities – the key to the security of the Hyperledger Fabric network
- Chaincode security
- Common threats and how Hyperledger Fabric mitigates them 
- Hyperledger Fabric and Quantum Computing
- General data protection regulation (GDPR) considerations
- Summary
- Introduction to Blockchain Technology
- Ethereum Fundamentals
- Overview of Solidity Programming
- Building an Ethereum Blockchain Application
- Exploring an Enterprise Blockchain Application Using Hyperledger Fabric
- Issuance claim
- Setting up a Hyperledger Fabric environment
- Writing chaincode
- Configuring Hyperledger Fabric
- Generating the certificate
- Generating an orderer genesis block
- Generating a channel configuration transaction
- Overview of Hyperledger Fabric Docker composer configuration files
- Fabric project directory structure
- Docker-compose-base.yaml
- Peer-base.yaml
- Starting the Hyperledger Fabric network
- Creating a channel
- Joining channels
- Updating the anchor
- Installing chaincode
- Instantiating the chaincode
- Invoking add broker
- Invoking add insurer
- Invoking ReportLost
- Invoking RequestedInfo
- Invoking SubmitClaim
- Invoking ConfirmClaimSubmission
- Invoking ApproveClaim
- Querying claim history
- End-to-end test execution 
- Summary
- Implementing Business Networks Using Hyperledger Composer
- Blockchain Use Cases
- Blockchain use case examples
- Payment and settlement services
- Import and export finance
- Immutable ledger
- Regulatory compliance and auditing
- Identity theft detection
- Funds back-office operation
- Collateral management
- Healthcare systems
- Real estate trading and rental markets
- IP market
- Elections
- HR and recruiting
- Public records
- Reduce contract disputes
- Sharing economy
- Integration with IoT
- Facilitate commercial and social relationships
- How to choose a proper use case
- DApp use case – healthcare data sharing
- Summary
- Blockchain use case examples
- Other Books You May Enjoy
Summary
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