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Bitcoin Programming

This book is about teaching Bitcoin programming; to help people delve deeper Exercise 6.17 The Bitcoin white paper (PDF) is stored on the blockchain.



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Programming Bitcoin. Learn How to Program Bitcoin from Scratch. Jimmy Song story pics torials fers & Dea ghlights ttings. Support. Sign Out 





Bitcoin: Un Sistema de Efectivo Electrónico Usuario-a-Usuario 1

Traducido al Español de bitcoin.org/bitcoin.pdf por Angel León - www.diariobitcoin.com. Abstracto. Una versión puramente electrónica de efectivo permitiría 



Step by Step Towards Creating a Safe Smart Contract: Lessons and

18 nov 2015 extend Bitcoin's design by offering a rich programming language for writing “smart contracts.” Smart contracts are user-defined programs ...



Programming Bitcoin

For example: “Programming Bitcoin by Jimmy Song. (O'Reilly). The creator of this transaction split up the whitepaper PDF into 64-byte chunks.



Mastering Bitcoin

If you're a programmer sell your programming skills. If you have an online store



Users Manual

Manual. Mode. Indicator. Auto-tuning. Indicator. The left diagram shows program no. 6 for BTC-9100 with version 24. The program no. for BTC-7100 is 13.



blockchain-programming-in-csharp.pdf

Blockchain Programming in C#. Authored by Nicolas Dorier. Contributor for NBitcoin. The .NET Bitcoin Framework. Co-authored With Bill Strait.



VIRTUAL CURRENCY SCHEMES OCTOBER 2012

21 oct 2012 The first case study in this report relates to Bitcoin a virtual currency ... Designed and implemented by the Japanese programmer Satoshi ...



Bitcoin Programming - kkarasavvascom

Bitcoin mining is the process of solving the PoW puzzle and selecting the next valid block in a way that is undisputed and thus achieve consensus on the current blockchain state Bitcoin uses the Hashcash PoW algorithm [1] for its mining Figure 1 4: All nodes will eventually receive all transactions but they are free to include



Bitcoin Programming

programming decentralized applications engage in blockchain governance systems reason about both privacy and scalability trade-offs among different cryptocurrencies and research and consider relevant jurisdictional guidelines and regulations The best way to be equipped to speak to engage with and apply cryptocurrency to your



Andreas M Antonopoulos

This book is mostly intended for coders If you can use a programming language this book will teach you how cryptographic currencies work how to use them and how to develop software that works with them The first few chapters are also suitable as an in-depth introduction to bitcoin for non-coders - those trying to understand the inner



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1 The starting point: Bitcoin mechanics 2 Consensus protocols 3 Ethereum and decentralized applications 4 DeFi: decentralized applications in finance 5 Private transactions on a public blockchain (SNARKs and zero knowledge proofs) 6 Scaling the blockchain: getting to 10K Tx/sec 7 Interoperability among chains: bridges and wrapped coins



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A program in BitcoinScript is a sequence of operations for its stack machine Bitcoin Script hasconditionals but no loops thus all programs halt and the language is not Turingcomplete Originally these programs were committed as part of the output eld of aBitcoin transaction



Searches related to programming bitcoin pdf filetype:pdf

Bitcoin is a virtual monetary unit and therefore has no physical representation A Bitcoin unit is divisible and can be divided into 100 million “Satoshis” the smallest fraction of a Bitcoin The Bitcoin Blockchain is a data file that carries the records of all past Bitcoin transactions including the creation of new Bitcoin units

How to create bitcoin transactions programmatically?

    Creating Transactions Programmatically The Bitcoin node allows the creation of the basic transactions. It does not support arbitrary scripts. We can create those programmatically by explicitly specifying the locking/unlock- ing conditions.

When did you start teaching bitcoin programming?

    I started teaching Bitcoin programming in 2016. Every year I was trying to improve and update my material to keep it as relevant as possible. Luckily, Bitcoin progresses at a steady pace while always keeping backwards compatibility.

What are the inputs and outputs of a bitcoin transaction?

    6.1 Transactions A transaction sends bitcoins from one address to another and it consists of 1+ inputs and 1+ outputs. The inputs of a transaction consist of outputs of previous transactions. When an output is spend it can never be used again1. All the bitcoins are transferred elsewhere (to a recipient, back to yourself as change, etc.).

What are the features of bitcoin software?

    After installing the Bitcoin software10we can notice that it includes several executables, one providing the core functionality and the other for interaction and extra utility: bitcoind: The daemon server that implements the Bitcoin protocol and networking func- tionality. It also includes a wallet.

Jimmy Song

Programming

Bitcoin

Learn How to Program Bitcoin from Scratch

Jimmy Song

Programming Bitcoin

Learn How to Program Bitcoin from Scratch

978-1-492-03149-9

[LSI]Programming Bitcoin by Jimmy Song Copyright © 2019 Jimmy Song. All rights reserved.

Printed in the United States of America.

Published by O'Reilly Media, Inc., 1005 Gravenstein Highway North, Sebastopol, CA 95472.

O'Reilly books may be purchased for educational, business, or sales promotional use. Online editions are

also available for most titles (http://oreilly.com). For more information, contact our corporate/institutional

sales department: 800-998-9938 or corporate@oreilly.com.Editors: Mike Loukides and Michele Cronin

Production Editor: Kristen Brown

Copyeditor: James Fraleigh

Proofreader: Rachel HeadIndexer: Judy McConville

Interior Designer: David Futato

Cover Designer: Karen Montgomery

Illustrator: Rebecca DemarestMarch 2019:

First Edition

Revision History for the First Edition

2019-02-08: First Release

See http://oreilly.com/catalog/errata.csp?isbn=9781492031499 for release details.

The O'Reilly logo is a registered trademark of O'Reilly Media, Inc. Programming Bitcoin, the cover image,

and related trade dress are trademarks of O'Reilly Media, Inc.

The views expressed in this work are those of the author, and do not represent the publisher's views.

While the publisher and the author have used good faith efforts to ensure that the information and

instructions contained in this work are accurate, the publisher and the author disclaim all responsibility

for errors or omissions, including without limitation responsibility for damages resulting from the use of

or reliance on this work. Use of the information and instructions contained in this work is at your own

risk. If any code samples or other technology this work contains or describes is subject to open source

licenses or the intellectual property rights of others, it is your responsibility to ensure that your use

thereof complies with such licenses and ghts.

Table of Contents

Foreword. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . xi

Preface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . xiii 1.

Finite Fields. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . 1

Learning Higher-Level Math 1

Finite Field Definition 2

Defining Finite Sets 3

Constructing a Finite Field in Python 3

Exercise 1

5

Modulo Arithmetic 5

Modulo Arithmetic in Python 7

Finite Field Addition and Subtraction 8

Exercise 2

9

Coding Addition and Subtraction in Python 9

Exercise 3

10

Finite Field Multiplication and Exponentiation 10

Exercise 4

11

Exercise 5

11

Coding Multiplication in Python 12

Exercise 6

12

Coding Exponentiation in Python 12

Exercise 7

13

Finite Field Division 13

Exercise 8

15

Exercise 9

16

Redefining Exponentiation 16

Conclusion

17 iii

2.Elliptic Curves. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . 19

Definition

19

Coding Elliptic Curves in Python 26

Exercise 1

27

Exercise 2

27

Point Addition 27

Math of Point Addition 31

Coding Point Addition 33

Exercise 3

34

Point Addition for When x

1≠x2 35

Exercise 4

36

Coding Point Addition for When x

1≠x2 36

Exercise 5

36

Point Addition for When P

1 = P2 37

Exercise 6

38

Coding Point Addition for When P

1 = P2 38

Exercise 7

39

Coding One More Exception 39

Conclusion

403.

Elliptic Curve Cryptography. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Elliptic Curves over Reals 41

Elliptic Curves over Finite Fields 42

Exercise 1

44

Coding Elliptic Curves over Finite Fields 44

Point Addition over Finite Fields 45

Coding Point Addition over Finite Fields 47

Exercise 2

47

Exercise 3

47

Scalar Multiplication for Elliptic Curves 47

Exercise 4

49

Scalar Multiplication Redux 50

Mathematical Groups 51

Identity 51

Closure

52

Invertibility 53

Commutativity 54

Associativity 55

Exercise 5

56

Coding Scalar Multiplication 57

Defining the Curve for Bitcoin 58

Working with secp256k1 60

iv | Table of Contents

Public Key Cryptography 61

Signing and Verification 62

Inscribing the Target 63

Verification in Depth 65

Verifying a Signature 66

Exercise 6

67

Programming Signature Verification 67

Signing in Depth 68

Creating a Signature 68

Exercise 7

69

Programming Message Signing 70

Conclusion

724.

Serialization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . 73

Uncompressed SEC Format 73

Exercise 1

75

Compressed SEC Format 75

Exercise 2

79

DER Signatures 79

Exercise 3

81

Base58

81

Transmitting Your Public Key 81

Exercise 4

83

Address Format 83

Exercise 5

84

WIF Format 84

Exercise 6

85

Big- and Little-Endian Redux 85

Exercise 7

86

Exercise 8

86

Exercise 9

86

Conclusion

86
5.

Transactions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . 87

Transaction Components 87

Version

90

Exercise 1

90

Inputs

90

Parsing Script 95

Exercise 2

96

Outputs

96

Exercise 3

97

Table of Contents | v

Locktime

98

Exercise 4

98

Exercise 5

98

Coding Transactions 99

Transaction Fee 100

Calculating the Fee 102

Exercise 6 102

Conclusion 1026.

Script. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . 103

Mechanics of Script 103

How Script Works 105

Example Operations 105

Coding Opcodes 106

Exercise 1 107

Parsing the Script Fields 107

Coding a Script Parser and Serializer 108

Combining the Script Fields 111

Coding the Combined Instruction Set 111

Standard Scripts 111

p2pk 112

Coding Script Evaluation 115

Stack Elements Under the Hood 117

Exercise 2 118

Problems with p2pk 118

Solving the Problems with p2pkh 120

p2pkh 120

Scripts Can Be Arbitrarily Constructed 124

Exercise 3 127

Utility of Scripts 127

Exercise 4 127

SHA-1 Piñata 128

Conclusion 128

7.

Transaction Creation and Validation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129

Validating Transactions 129

Checking the Spentness of Inputs 130

Checking the Sum of the Inputs Versus the Sum of the Outputs 130

Checking the Signature 131

Exercise 1 135

Exercise 2 135

Verifying the Entire Transaction 135

vi | Table of Contents

Creating Transactions 136

Constructing the Transaction 136

Making the Transaction 139

Signing the Transaction 141

Exercise 3 141

Creating Your Own Transactions on testnet 141

Exercise 4 142

Exercise 5 142

Conclusion 1428.

Pay-to-Script Hash. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . 143

Bare Multisig 143

Coding OP_CHECKMULTISIG 148

Exercise 1 148

Problems with Bare Multisig 148

Pay-to-Script-Hash (p2sh) 149

Coding p2sh 156

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