Chapter 11. Bitcoin upgrades

This chapter covers

  • Understanding hard forks and soft forks
  • Upgrading Bitcoin safely
  • Understanding that users make the rules

To understand this chapter, you should be comfortable with concepts like the blockchain (chapter 6), proof of work (chapter 7), and the peer-to-peer network (chapter 8). If you had difficulties with those chapters, I suggest you revisit them before continuing with this chapter. Of course, you can also just try to read on anyway.

Bitcoin’s consensus rules can change in two ways: via either a soft fork or via a hard fork. These two types of changes are fundamentally different. In “Bitcoin forks,” you’ll learn about the differences between hard and soft forks and about what happens when different ...

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