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Tower Byzantine Fault Tolerance (Tower BFT)

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Table of contents
    1. 0.2. How Tower BFT Works
    2. 0.4. Why Tower BFT Matters

Tower BFT is Solana’s unique version of Byzantine Fault Tolerance that secures consensus by using a cryptographic time source called Proof of History (PoH).

How Tower BFT Works

Tower BFT builds on the Practical Byzantine Fault Tolerance (PBFT) model but adds a synchronized clock via PoH to speed up consensus without constant communication between nodes. Validators vote on the validity of blocks, and previous votes are locked in unless a new supermajority is formed, preventing malicious actors from manipulating the chain’s history.

Why Tower BFT Matters

Tower BFT allows Solana to achieve high throughput and fast finality while maintaining security. It’s a key reason why Solana can handle thousands of transactions per second without sacrificing decentralization or integrity. By optimizing consensus with time-based voting, it supports scalable and efficient blockchain operations.