Authors: Quentin Kniep, Kobi Sliwinski, Roger Wattenhofer Summary Alpenglow is a major overhaul of Solana’s core consensus protocol, replacing the existing Proof-of-History and TowerBFT mechanisms with a modern architecture focused on performance, resilience, and whenever possible simplicity. At the heart of this new design is Votor, a lightweight, direct-vote-based protocol that finalizes blocks using either a single or dual-round voting process, depending on network conditions. Alpenglow sig...