Zcash teams propose Ironwood pool to restore supply verification after Orchard flaw

Written by Ezra Reguerrastaff writerReviewed by Yohan Yunstaff writerWritten by Ezra Reguerrastaff writerReviewed by Yohan Yunstaff writerZcash teams propose Ironwood pool to restore supply verification after Orchard flawLatest NewsPublishedJun 8, 2026Ironwood would close the old Orchard pool to new activity and route funds through a turnstile before they enter a new shielded pool.Zcash developers are proposing a new shielded pool called Ironwood after a recently patched bug raised concerns about whether counterfeit ZEC could have entered circulation unnoticed.The Zcash Open Development Lab (ZODL) said Saturday that it is working with Tachyon, Valar Group, the Zcash Foundation and Shielded Labs on the proposed network upgrade, which would add formal verification and independent audits to the Orchard protocol, a privacy system that lets users move ZEC without revealing transaction details.The proposal would close the current Orchard pool to new deposits and internal transactions, requiring funds to pass through a “turnstile,” which serves as an accounting checkpoint, before entering Ironwood.The Zcash Foundation said Wednesday that auditors discovered a vulnerability in the Orchard shielded pool. Developers said there was no evidence that user funds were affected or that Zcash's total supply changed. Auditors at Shielded Labs said the vulnerability could have allowed attackers to create an infinite amount of counterfeit ZEC within Orchard without detection.Source: ZODLIronwood could show whether counterfeit ZEC existedIn a separate X post, Shielded Labs said Ironwood may produce evidence about whether the Orchard bug was ever exploited, though the proposal does not depend on proving the issue retroactively. If users migrate from Orchard to Ironwood and no excess ZEC tries to leave the old pool, that would be strong evidence that the vulnerability was never exploited, Shielded Labs said. If excess ZEC tries to leave, the turnstile would reject it, effectively preve…

Zcash teams propose Ironwood pool to restore supply verification after Orchard flaw

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