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. Zcash has activated its Ironwood (NU6.3) upgrade, sealing the Orchard shielded pool that held about 3.66 million ZEC and opening a new private pool that starts with zero coins. A previously undisclosed bug in Orchard’s proof circuit could have allowed the creation of counterfeit ZEC without onchain traces, prompting…
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