CoinDesk
About 176,000 ZEC, worth roughly $81 million, had migrated into Zcash's new Ironwood shielded pool within a day of activation, according to the Ironwood migration tracker. That is roughly 5% of the 3.66 million ZEC that sat in Orchard when Ironwood went live, with Orchard already down to about 3.51 million ZEC as the turnstile mechanism continues to drain it.
Ironwood replaces Orchard as the network's leading-edge shielded pool after a counterfeiting flaw in Orchard's earlier cryptography went undetected for four years. Orchard can no longer accept deposits; every coin still inside has to leave through the turnstile, an accounting rule that caps total withdrawals at the amount verifiably deposited, so its balance can only fall from here.
Why it matters
The speed of the first-day migration matters less than the structural setup it reveals. Each time Zcash upgrades its privacy cryptography, it opens a new pool rather than rebuilding the old one, leaving holders to move their own coins across. Migration is voluntary, which means the timeline now depends on how quickly wallets, exchanges, and individual users act. For now, the bulk of Zcash's private supply is sitting in a pool that has been closed to new deposits since Tuesday.
The Sapling pool, introduced in 2018, holds roughly 582,000 ZEC, and the transparent pool, which behaves like Bitcoin with every balance visible on-chain, holds about 12.5 million ZEC. ZEC holders can also choose to remain visible by exiting into the transparent pool rather than migrating to the new shielded one, a decision that reshapes the privacy mix of the network over time.
Market impact
The first-day flow is a real signal of demand for the upgraded cryptography, but the bigger story is the multi-month unwind ahead. Most shielded ZEC still has to cross the turnstile, and the pace of that exit will determine how much shielded liquidity Ironwood actually accumulates versus how much simply becomes transparent. Exchanges and wallet providers that have not yet integrated Ironwood support are the bottleneck; until they do, a meaningful slice of the supply sits in limbo.
Frequently asked questions
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What is the Zcash Ironwood upgrade?
Ironwood is Zcash's newest shielded pool, replacing Orchard after a counterfeiting flaw in Orchard's cryptography went undetected for four years. Orchard can no longer accept deposits, and coins still inside must exit through a turnstile mechanism that caps withdrawals at the amount verifiably deposited.
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How much ZEC has migrated to Ironwood so far?
About 176,000 ZEC, worth roughly $81 million, moved into Ironwood in the first day, representing roughly 5% of Orchard's 3.66 million ZEC balance at activation. Orchard has since fallen to about 3.51 million ZEC.
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Why can't ZEC stay in the Orchard pool?
Orchard cannot accept new deposits. Every remaining coin must leave through the turnstile, an accounting rule that limits total withdrawals to the amount verifiably deposited, so the pool's balance can only fall over time.
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Is migration to Ironwood mandatory?
No. Migration is voluntary, which means the timeline depends on how quickly individual holders, wallets, and exchanges move funds. Holders who do not migrate will eventually have to either cross the turnstile into Ironwood or exit into Zcash's transparent pool.
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How does Ironwood affect ZEC's privacy supply?
The shielded supply is split across Sapling (~582,000 ZEC), Orchard (~3.51 million ZEC and falling), and Ironwood (growing). Roughly 12.5 million ZEC sits in the transparent pool with public balances. The pace of Orchard exits and Ironwood entries will reshape Zcash's privacy mix over the coming months.
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