Liveness Failure

A liveness failure occurs when a blockchain network stops processing transactions or fails to produce new blocks, even if the nodes are not necessarily acting maliciously. This can happen due to network congestion, software bugs, or a lack of sufficient active validators.

Unlike safety violations, which compromise the integrity of the data, liveness failures represent a temporary halt in the network's utility. For financial systems, this can be disastrous, as it prevents users from moving assets, settling trades, or responding to market events.

Protocols are engineered with specific liveness guarantees, but real-world conditions can sometimes push these systems to their limits.