Zcash activates Ironwood (NU6.3) at block 3,428,143, starting migration of 3.66 million ZEC from Orchard
AI Market Summary
Zcash's Ironwood (NU6.3) upgrade has retired the vulnerable Orchard shielded pool and started a user-driven migration into a new zero-balance pool, with ~3.66M ZEC affected. The turnstile mechanism caps withdrawals to verifiable deposits, containing any hypothetical counterfeit coins inside Orchard while preserving privacy. Near-term focus is operational: migration speed, liquidity frictions, and confidence in protocol-layer security and formal verification.
Impact level
● Medium
Affected assets
ZEC/USDT-2.87%
AI Insight · ZEC/USDTAI Insight
● Neutral
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Zcash has completed the Ironwood (NU6.3) upgrade, shutting down the vulnerable Orchard shielded pool and opening a new shielded pool that begins with a zero balance. The change follows findings by Shielded Labs researchers that a flaw in Orchard’s proof circuit could have enabled undetectable counterfeit ZEC issuance. About 3.66 million ZEC (roughly $1.7 billion at market prices) must be migrated by users, with attention focused on how quickly funds move.
