Alpenglow Finality in Numbers: 60%, 80%, 250 ms, 800 ms

Breakdown of Alpenglow constants in Solana: notarization and finalization certificates require 60% of stake, fast confirmation requires 80%, and leader is skipped after 800 ms instead of the previous 1.4 s. Validator votes are no longer transactions and are sent via QUIC datagrams.

• Notarization and finalization threshold: 60% stake, fast confirmation: 80%
• Leader skipped after 800 ms from window start, previously 1.4 s
• DELTA is 250 ms, DELTA_TIMEOUT is 400 ms, timeouts grow 5% during idle
• Vote reward split 50/50 between validator and leader after 8 slots