Zcash's Ironwood upgrade attracted $80M in ZEC on day one, sealing the old Orchard pool to fix a four-year-old bug that risked counterfeit token

The upgrade retires Orchard, where a counterfeiting bug sat undetected for four years. Every coin inside now has to leave through a gate that caps withdrawals at verified deposits.

The long-awaited network upgrade retires the vulnerable Orchard shielded pool and introduces new safeguards to protect the Zcash supply.