Transaction Confirmation Rules

Definition ∞ Transaction confirmation rules are the protocols that determine when a cryptocurrency transaction is considered irreversible and final on a blockchain. These rules specify the number of subsequent blocks that must be added to the blockchain after a particular transaction is included in a block before it is deemed sufficiently confirmed and secure. The required number of confirmations varies across different blockchain networks and depends on the desired level of security against double-spending attacks. These protocols ensure the integrity and finality of transfers of digital assets.
Context ∞ Transaction confirmation rules are fundamental to the security and user experience of blockchain networks, often discussed in news related to transaction finality, network congestion, and security concerns. Faster confirmation times are sought for payment efficiency, while a higher number of confirmations offers stronger security, particularly for large value transfers. Ongoing protocol upgrades in various blockchains aim to optimize these rules to balance speed with robust security assurances.