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

Originally published on xroot.dev. Ask five Solana traders how long a transaction takes to become final and you will get five answers, all of them "about a second" and none of them a definition. Today "confirmed" means two-thirds of stake voted on the block at least once, and "finalized" means 32 blocks were built on top of it — a depth, not a...