Zcash bounces 45% as developers propose Ironwood upgrade to restore supply verification
In brief
- Zcash surged 45% from Friday's $300 low to $437 on Monday
- Ironwood upgrade proposed to restore supply verification after counterfeiting bug patched
- New privacy pool creation and Orchard pool closure planned under Ironwood
- Undetected bug since 2022 risked unlimited counterfeit ZEC creation
The Bug and the Patch
Shielded Labs, a nonprofit developer on the network, disclosed a counterfeiting bug in Zcash's Orchard pool that had gone undetected since 2022. The flaw could have allowed an attacker to create unlimited fake ZEC without anyone noticing and withdraw tokens from the protocol's shielded pool. Developers patched the bug within days through emergency network upgrades, coordinated with the mining pools ViaBTC and Foundry.
The speed of the fix prevented broader damage, but it left a trust problem. Users couldn't independently verify that the bug hadn't been exploited or that the coin supply remained intact. Shielded Labs stated it believes exploitation was unlikely, yet the incident exposed a gap in Zcash's transparency model.
Ironwood: Restoring Verification
On June 6, developers proposed Ironwood, a plan to restore users' ability to confirm the coin's supply is sound. The upgrade would create a new privacy pool using the repaired code and block the creation of new coins in the old Orchard pool. Once it activates, anyone running Zcash software could add up the balances across pools and confirm that no more than the correct amount of ZEC exists.
This shift matters. Users would not have to trust the developers' word or wait for funds to migrate to verify supply. Instead, verification becomes a function of running a node, the same way Bitcoin holders can audit the ledger themselves.
Investor Chamath Palihapitiya described Ironwood as a way for anyone running a node to tally the balances across pools and confirm supply integrity. The plan could also reveal whether the bug was ever abused, providing historical clarity that the community currently lacks.
Developers have not given a firm timeline for the upgrade. The proposal signals intent to rebuild confidence, but Zcash holders are watching closely.
CoinDesk reported the full details of the Ironwood proposal and the prior emergency patching.
