Solana nears finality halt as 29% of staked SOL goes offline after routing failure

Roughly 28.83% of staked SOL dropped offline on Solana following a routing failure, bringing the network uncomfortably close to the 33.34% mark where transaction finality grinds to a halt. That’s a margin of about 4.5 percentage points between normal operations and a network that can no longer confirm transactions are permanent. How close was too close Solana’s consensus mechanism, Tower Byzantine Fault Tolerance (BFT), requires roughly two-thirds of all staked SOL, about 66.67%, to actively participate in order to finalize transactions. Flip that around, and it means if more than 33.34% of stake goes dark, the network loses the supermajority it needs. Blocks might still be produced, but nothing gets stamped as irreversible. At 28.83% offline, Solana was roughly 4.5 percentage points from that cliff. In practical terms, just a few additional large validators going delinquent could have tipped the balance. Validators that go offline on Solana don’t face slashing penalties, the punitive mechanism some other proof-of-stake chains use to discourage downtime. Instead, they simply stop earning rewards. Solana’s uptime streak and its limits Before this incident, Solana had been on an impr...