PoS Finality

Definition ∞ PoS finality refers to the irreversible confirmation of transactions and blocks within a Proof-of-Stake blockchain. Once a block achieves finality, it cannot be altered or reverted without significant, economically infeasible network collusion. This property assures users that their transactions are permanently recorded. It is a critical security attribute, providing strong assurances against reorganizations.
Context ∞ PoS finality is a key metric for the security and reliability of proof-of-stake networks, directly impacting user confidence and application development. News often discusses the specific finality mechanisms of different blockchains and their implications for transaction certainty. Ongoing research aims to accelerate finality while preserving decentralization and fault tolerance, particularly for cross-chain interactions.