ALPENGLOW: A NEW CONSENSUS FOR SOLANA

Summary from the TLDR Crypto newsletter

Solana's Alpenglow consensus mechanism replaces TowerBFT and Proof-of-History with Votor for concurrent one- and two-round voting finality and Rotor for erasure-coded, single-hop data dissemination, foregoing gossip. Simulations based on current stake distribution show median finality latency of ~150 ms (as fast as 100 ms), down from ~12.8 s under the legacy protocol. Alpenglow's “20+20” resilience tolerates 20% adversarial and 20% non-responsive stake, while Rotor maximally leverages network bandwidth to minimize leader bottlenecks.