Solana Tests Alpenglow to Achieve 150-Millisecond Transaction Finality

Solana has begun testing Alpenglow, a major consensus overhaul developed by Anza to replace TowerBFT and Proof of History. By utilizing new components Votor and Rotor, the upgrade aims to reduce transaction finality from 12.8 seconds to 150 milliseconds. The protocol, which has received over 98% support from validators, is designed to remain resilient against 20% malicious stake and 20% offline stake, potentially enabling near-instant irreversible payments for exchanges, bridges, and merchants.