Byzantine Fault Tolerance in Practice
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Byzantine Fault Tolerance in Practice

Implement BFT algorithms for systems with malicious actors. PBFT, Tendermint, and practical deployment.

By Dr. Sofia MartinezByzantine fault toleranceBFTPBFT

Byzantine Fault Tolerance

BFT handles malicious nodes in distributed systems. Required for trustless networks but computationally expensive.

PBFT Algorithm

```python class PBFTNode: def execute_pbft(self, request): # 1. Pre-prepare if self.is_primary: self.broadcast_preprepare(request) # 2. Prepare (wait for 2f+1 matches) if self.collect_prepare_votes() >= 2self.f + 1: self.broadcast_commit() # 3. Commit (wait for 2f+1) if self.collect_commit_votes() >= 2self.f + 1: self.execute(request) ``` Tolerates f failures out of 3f+1 nodes. Related: Blockchain Consciousness (2050)

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