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Chapter 1 - What is Bitcoin?

  • Updated Bitcoin history

  • More user stories and updates

  • More examples of bitcoin uses and clients

  • Updated guide on how to get, use, spend bitcoin

Chapter 2 - How Bitcoin Works

  • Many small changes, updates and improvements

Chapter 3 - Bitcoin Core

  • Improved and updated examples and code

  • Configuration options and examples

  • Running a bitcoin node

  • Updated libraries

Chapter 4 - Keys and Addresses

  • Many small improvements

  • Improved and new diagrams

Chapter 5 - Wallets

  • Much more detail on BIP39 Mnemonic Code Words

  • BIP39 Passphrases and use-cases

  • Using public extended keys on an e-commerce server

  • Improved and new diagrams

Chapter 6 - Transactions

  • Transaction Structure

  • More detail on inputs and outputs

  • Transaction serialization/deserialization

  • Transaction Fees

  • Dynamic fees

  • Fee estimation

  • Third-party fee estimation services

  • Digital Signatures

  • Signature creation and verification

  • Signature serialization (DER encoding)

  • SIGHASH flags

  • ECDSA Math overview

Chapter 7

  • Time Locks

  • Transaction level absolute (nLocktime)

  • UTXO/Script level absolute (CHECKLOCKTIMEVERIFY)

  • Input level relative (nSequence)

  • UTXO/Script level relative (CHECKSEQUENCEVERIFY)

  • Median Time Past

  • Timelock defense against fee sniping

  • Script Flow Control

  • VERIFY guard clauses

  • Time lock guard clauses

  • Complex script (example and analysis)

Chapter 8

  • Relay networks

  • SPV node improvements

  • Bloom filters and SPV

  • SPV nodes and privacy

  • Encrypted and Authenticated connections (BIP150/151)

Chapter 9

  • Merkle trees and SPV

  • Test blockchains

  • Testnet

  • Using testnet

  • Segnet

  • Regtest

  • Using regtest

  • Development with test blockchains

Chapter 10

  • Hard forks, soft forks and signaling

  • Diverging hard forks

  • Soft forks for feature upgrades

  • Signaling soft forks with block version

  • BIP-9 (versionbits) signaling and activation

  • Consensus software development

Chapter 11

  • Security principles

Chapter 12 (all new chapter)

  • Blockchain application

  • Building blocks of the trust platform

  • Constructing blockchain applications

  • Colored Coins

  • Counterparty

  • Payment channels

  • Video streaming example

  • Timelock payment channels

  • Asymmetric revocable commitments

  • Hash Time Locked Contracts (HTLC)

  • Lightning Network

  • Routed payment channels

  • Transport and Onion routing

  • Lightning Network Benefits

Appendix - Segregated Witness (all new chapter)

  • Introduction to Segregated Witness

  • Why segwit?

  • Segwit transactions, outputs and scripts

  • P2WPKH

  • P2WSH

  • Nested segwit

  • Considerations for backwards compatibility

  • P2SH(P2WPKH)

  • P2SH(P2WSH)

  • Transaction Identifiers (txid) and Malleability Fix

  • New Signing Algorithm

  • Economic Incentives for Segwit