Finality Time

The duration after which a blockchain transaction is considered irreversible and cannot be rolled back. Finality time varies significantly across chains: Bitcoin achieves probabilistic finality after ~60 minutes (6 confirmations), Ethereum reaches finality in ~13 minutes (2 epochs), while chains like Avalanche and Solana offer near-instant finality in under 2 seconds. Understanding finality time is critical for exchanges, bridges, and any application where transaction reversals would cause financial loss.