Zakura Node Hits Four-Hour Sync as Zcash Preps July 28 Ironwood Upgrade

Zcash developers are sealing off a shielded pool that carried a critical bug, and a new node built for speed is already backing the fix. The Ironwood hard fork, known as NU6.3, activates around July 28, 2026, at block height 3,428,143. It closes a soundness flaw in the Orchard shielded pool and opens a new