Within 24 hours of Zcash’s latest upgrade, around 176,000 ZEC, valued near $81 million, migrated into the new Ironwood shielded pool. This shift represents about 5 percent of the assets previously held in the now-retired Orchard pool, which can no longer accept deposits.
Orchard Pool Closure and Migration Mechanics
The Orchard pool, introduced in 2022, served as the network's primary shielded pool until the Ironwood upgrade sealed it off. Since it no longer accepts new deposits, all remaining funds must exit through a turnstile mechanism. This system enforces a strict cap on withdrawals, ensuring that no more coins leave the pool than were originally deposited, a security measure that reflects lessons from a counterfeiting vulnerability uncovered after four years.
As a result, the Orchard pool’s balance has shrunk from 3.66 million ZEC at activation to approximately 3.51 million ZEC, with a steady trickle of assets moving to Ironwood. However, migration isn’t mandatory, leaving a large portion of shielded coins temporarily stranded until holders, wallets, and exchanges complete their transfers at their own pace.
Zcash Pools and Privacy Evolution
Zcash’s architecture features distinct pools that represent different stages of its privacy technology. The transparent pool, which is public and similar to Bitcoin’s ledger, contains around 12.5 million ZEC. Sapling, the first shielded pool created in 2018, currently holds over half a million ZEC. Orchard followed in 2022, reaching 3.5 million ZEC before its closure.
Each upgrade like Ironwood initiates a new pool rather than revamping the previous ones, compelling holders to manually migrate their assets for enhanced privacy and security. This segmented structure reflects ongoing innovation in zero-knowledge proof technology but also presents logistical challenges for users managing multiple pools.
This content is for informational purposes and does not constitute financial advice.
