Definition ∞ A BFT consensus stack represents a layered architecture designed to achieve Byzantine Fault Tolerant agreement among distributed nodes. This structure typically includes distinct modules for message passing, state machine replication, and fault detection. Each layer contributes to the collective agreement process, ensuring system integrity even when some participants act maliciously.
Context ∞ In blockchain technology, the BFT consensus stack is a fundamental component for achieving high-assurance finality and resistance to attacks, particularly in proof-of-stake networks. Its design influences the network’s ability to process transactions securely and efficiently, making it a frequent subject in news about protocol upgrades and network stability. Debates often center on optimizing these stacks for performance without compromising security guarantees.
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