Fast finality refers to the characteristic of a blockchain network where transactions are confirmed and irreversibly recorded on the ledger with minimal delay. This attribute is crucial for applications requiring rapid transaction settlement and high throughput. Unlike probabilistic finality, which relies on the increasing likelihood of a transaction’s permanence over time, fast finality offers near-immediate certainty. Systems achieving fast finality enhance user experience and enable more complex, time-sensitive decentralized applications.
Context
The pursuit of fast finality is a central objective in the development of next-generation blockchain protocols and layer-2 scaling solutions. News reports frequently detail advancements in consensus mechanisms and network architectures designed to reduce transaction confirmation times. Debates often focus on the trade-offs between speed, security, and decentralization, as different approaches to achieving finality present distinct risk profiles and operational characteristics.
This research reveals that arbitrageurs on fast-finality blockchains maximize profit by splitting MEV opportunities into small, spam-based transactions, exposing critical flaws in current fee mechanisms.
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