Definition ∞ Chain finality signifies that once a transaction is recorded on a blockchain, it cannot be altered, reversed, or removed. This property assures participants their transactions are irreversible and permanently settled. Different consensus mechanisms achieve varying degrees of finality, impacting the trust and security model of a digital asset system.
Context ∞ The concept of chain finality is a frequent topic in discussions concerning blockchain scalability, security, and user experience, particularly when comparing Proof-of-Work and Proof-of-Stake protocols. News articles often report on protocol upgrades or new blockchain designs that aim to enhance or expedite transaction finality, directly affecting the perceived reliability and utility of digital assets. Regulatory bodies also examine finality as a factor in assessing the suitability of blockchain systems for financial applications.
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