Transaction Finality Quorum

Definition ∞ Transaction finality quorum refers to the minimum number or proportion of validators or network participants required to agree on the validity of a transaction before it is considered irreversible and added to the blockchain. This threshold ensures the integrity and security of the network by preventing malicious actors from altering confirmed transactions. It is a fundamental aspect of decentralized consensus.
Context ∞ The specific transaction finality quorum requirements vary across different blockchain protocols, influencing their security guarantees and the speed at which transactions achieve irreversible confirmation. Debates often arise regarding the optimal quorum size, balancing decentralization with efficiency. News reports may discuss how changes to these quorums impact a network’s overall security posture and performance.