دانلود کتاب Practices of the Python Pro

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front cover title copyright brief contents contents Preface Acknowledgments About this book Who should read this book How this book is organized: A roadmap About the code liveBook discussion forum Other online resources About the author About the cover illustration Part 1: Getting started with blockchain programming Chapter 1: Blockchain basics 1.1 From Bitcoin to blockchain 1.2 What is a blockchain? 1.3 Blockchain programming 1.3.1 Decentralized infrastructure 1.3.2 Distributed ledger technology 1.3.3 Disintermediation protocol 1.3.4 Trust enabler 1.4 Motivating scenarios 1.4.1 Automatic and consistent data collection 1.4.2 Timely information sharing 1.4.3 Verifiable compliance 1.4.4 Auditable actions for provenance 1.4.5 Guidance for governance 1.4.6 Attribution of actions 1.4.7 Pandemic management 1.5 Retrospective 1.6 Summary Chapter 2: Smart contracts 2.1 The concept of a smart contract 2.1.1 Bitcoin transactions versus smart contract transactions 2.1.2 What does a smart contract do? 2.2 Design of a smart contract 2.2.1 A use case diagram for the counter 2.2.2 Data assets, peer participants, roles, rules, and transactions 2.2.3 From class diagram to contract diagram 2.3 Development of a smart contract code 2.3.1 Solidity language 2.3.2 Smart contract code for Counter 2.4 Deploying and testing the smart contract 2.4.1 The Remix IDE 2.4.2 Deployment and testing 2.4.3 Key takeaways 2.5 What makes a blockchain contract smart? 2.6 Decentralized airline system use case 2.6.1 ASK definition 2.6.2 Sequence of operations 2.7 Airlines smart contract 2.7.1 Peer participants, data assets, roles, rules, and transactions 2.7.2 Airlines smart contract code 2.7.3 ASK smart contract deployment and testing 2.8 Smart contract design considerations 2.9 Best practices 2.10 Summary Chapter 3: Techniques for trust and integrity 3.1 Essentials of trust and integrity 3.1.1 Trust 3.1.2 Integrity 3.2 Digital democracy problem 3.2.1 Designing a solution 3.2.2 Use case diagram 3.2.3 Incremental development of code 3.2.4 Users, assets, and transactions 3.2.5 Finite state machine diagram 3.2.6 Trust intermediation 3.2.7 Defining and using modifiers 3.2.8 Contract diagram including modifiers 3.2.9 Putting it all together 3.3 Testing 3.3.1 Positive tests 3.3.2 Negative tests 3.4 Using modifiers, require(), and revert() 3.5 Assert() declarations 3.6 Best practices 3.7 Retrospective 3.8 Summary Chapter 4: From smart contracts to Dapps 4.1 Dapp development using Truffle 4.1.1 The development process 4.1.2 Installing Truffle 4.1.3 Building the Dapp stack 4.2 Install Ganache test chain 4.3 Develop the smart contract 4.3.1 Create a project folder 4.3.2 Add smart contract and compile 4.3.3 Configure blockchain network 4.3.4 Deploy the smart contract 4.4 Develop and configure the web application 4.4.1 Develop ballot-app 4.4.2 Launch the ballot-app 4.4.3 Install MetaMask wallet 4.4.4 Interact with Ballot-Dapp 4.4.5 Connect web client to smart contract 4.5 Retrospective 4.6 Best practices 4.7 Summary Part 2: Techniques for end-to-end Dapp development Chapter 5: Security and privacy 5.1 Cryptography basics 5.1.1 Symmetric key cryptography 5.1.2 Asymmetric key cryptography 5.2 The relevance of public-key cryptography to blockchain 5.2.1 Generating Ethereum addresses 5.2.2 Transaction signing 5.2.3 Deploying smart contracts on Ropsten 5.2.4 Using the private key in mnemonic form 5.2.5 Populating a blockchain wallet 5.2.6 Deploying and transacting on Ropsten 5.3 Hashing basics 5.3.1 Digital signing of documents 5.3.2 Hashed data on distributed ledger 5.3.3 Hashes in Ethereum block header 5.3.4 Solidity hashing functions 5.4 Application of hashing 5.4.1 Blind auction design 5.4.2 Blind auction smart contract 5.4.3 Privacy and security aspects 5.4.4 Testing the BlindAuction contract 5.4.5 Test plan 5.5 Retrospective 5.6 Best practices 5.7 Summary Chapter 6: On-chain and off-chain data 6.1 On-chain data 6.2 Blind auction use case 6.2.1 On-chain event data 6.2.2 Blind auction with events 6.2.3 Testing with the web UI 6.2.4 Accessing on-chain data using the web3 API 6.3 Off-chain data: External data sources 6.4 ASK airline system 6.4.1 ASK concept 6.4.2 Airlines smart contract 6.4.3 ASK on-chain data 6.4.4 ASK off-chain data 6.4.5 ASK Dapp development process 6.4.6 ASK web user interface 6.4.7 Putting it all together 6.4.8 Interacting with ASK Dapp 6.5 Retrospective 6.6 Best practices 6.7 Summary Chapter 7: Web3 and a channel Dapp 7.1 Web3 API 7.1.1 Web3 in Dapp stack 7.1.2 Web3 packages 7.2 The channel concept 7.3 Micropayment channel 7.4 Micropayment channel use case 7.4.1 Traditional banking solution 7.4.2 Users and roles 7.4.3 On-chain and off-chain operations 7.4.4 MPC smart contract (MPC-contract) 7.4.5 MPC application development (MPC-app) 7.4.6 MPC sequence diagram 7.4.7 Demonstration of MPC execution 7.4.8 Accessing the web3 provider 7.4.9 Extensions of MPC 7.4.10 The relevance of the micropayment channel 7.4.11 Other web3 packages of interest 7.5 Retrospective 7.6 Best practices 7.7 Summary Chapter 8: Going public with Infura 8.1 Nodes and networks 8.2 Infura blockchain infrastructure 8.3 Going public with Infura 8.3.1 Blockchain node as a service 8.4 End-to-end process for public deployment 8.4.1 Account generation and management 8.4.2 Choosing a network and importing accounts 8.4.3 Collecting ether from faucets 8.4.4 Creating blockchain nodes on Infura 8.4.5 Installing HDWalletProvider 8.4.6 Configuring and deploying the smart contract 8.4.7 Configuring and deploying the web application 8.5 Deploying BlindAuction-Dapp on Infura 8.5.1 Setting up the blind auction environment 8.5.2 Decentralized participants 8.5.3 Configure and deploy the beneficiary account 8.5.4 Configure and deploy bidders 8.5.5 Interact with deployed blind auction Dapp 8.6 Deploying MPC-Dapp on Infura 8.6.1 Setting up the MPC environment 8.6.2 Configure and deploy the organizer 8.6.3 Configure and deploy the worker 8.7 Retrospective 8.8 Best practices 8.9 Summary Part 3: A roadmap and the road ahead Chapter 9: Tokenization of assets 9.1 Ethereum standards 9.1.1 Ethereum improvement proposal 9.1.2 ERC20 token standard 9.1.3 Fungible and non-fungible tokens 9.2 RES4: Non-fungible real estate token 9.2.1 Use case diagram 9.2.2 Contract diagram 9.2.3 RES4 ERC721-compliant token 9.2.4 RES4 Dapp 9.2.5 Interaction with RES4 Dapp 9.3 Retrospective 9.4 Best practices 9.5 Summary Chapter 10: Testing smart contracts 10.1 Importance of testing smart contracts 10.1.1 Types of testing 10.1.2 Language choice for test programs 10.2 Testing counter smart contract 10.2.1 Writing counter test script 10.2.2 Positive and negative tests 10.2.3 Running the test script 10.3 Testing ballot smart contract 10.3.1 Writing the ballot test script 10.3.2 Executing the ballot test script 10.3.3 Describe() and it() test functions 10.4 Recap writing of test script 10.5 The blind auction test script 10.5.1 Analysis of describe() and it() code 10.5.2 Executing the blind auction test script 10.5.3 Full auction run 10.6 Retrospective 10.7 Best practices 10.8 Summary Chapter 11: A roadmap to Dapp development 11.1 Motivating scenario: Educational credentialing 11.2 The roadmap 11.3 Problem description 11.3.1 Context for the DCC application 11.3.2 Design choices 11.4 Analysis and design 11.4.1 Operation flow and finite state machine 11.4.2 Contract diagram 11.5 Developing the smart contract 11.5.1 Data structures 11.5.2 Events 11.5.3 Modifiers 11.5.4 Functions 11.6 Local deployment 11.7 Automated testing using truffle 11.8 Developing the web application 11.8.1 UI design 11.8.2 Coding the app.js 11.9 Testing the DCC-Dapp 11.10 Public deployment 11.10.1 Deployment on Ropsten-Infura 11.10.2 Create web-client for distribution 11.11 Retrospective 11.12 Best practices 11.13 Summary Chapter 12: Blockchain: The road ahead 12.1 Decentralized identity 12.2 Self-managed identity 12.3 Consensus and integrity 12.3.1 Proof of work 12.3.2 Proof of stake 12.3.3 Byzantine fault-tolerant consensus 12.4 Scalability 12.5 Scalability solutions 12.5.1 Side channel 12.5.2 Block size 12.5.3 Network speed 12.6 Privacy 12.7 Public, private, and permissioned networks 12.8 Confidentiality 12.8.1 Open information 12.8.2 A solution 12.9 Security 12.10 Securing it with cryptocurrency 12.11 Accessing off-chain data (Oracles) 12.12 From foundations to practical systems 12.13 Looking ahead 12.14 Best practices 12.15 Retrospective 12.16 Summary appendix A: UML blockchain design models A.1 Problem analysis and design A.2 Behavioral diagrams A.2.1 Use case diagrams A.2.2 Finite state machine diagrams A.3 Structural diagrams A.3.1 Class diagrams A.3.2 Classes and relationships A.4 Interaction diagrams appendix B: Design principles index Numerics A B C D E F G H I J K L M N O P R S T U V W X back cover