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Distributed Systems Theory

To understand blockchain consensus protocols, requires some understanding of the primitives and issues discussed generally in distributed system design.

The next three readings provide a good context for thinking about consensus protocols. Neither of the algorithms discussed are not very complicated, but they demonstrate a lot of the concepts that come up in all protocols.

Recommended Readings:

Understanding Blockchain Fundamentals, Part 1: Byzantine Fault Tolerance

Consensus Protocols: Two-Phase Commit

Paxos Made Simple