Key facts
- Zcash NU7 mainnet upgrade targeted for November 5.
- NU7 will reduce Zcash block times from 75 seconds to 25 seconds.
- The upgrade will disable version 4 transactions.
- The Network Sustainability Mechanism will preserve Zcash's halving schedule.
- Full nodes, indexers, and block explorers may require adjustments for NU7.
Zcash developers have reached an agreement to proceed with the NU7 upgrade, targeting November 5 for its mainnet activation. The upgrade aims to reduce block times from 75 seconds to 25 seconds, enhancing transaction performance. Testnet activation is scheduled for October 6, with a final decision on the mainnet deployment set for October 20. The NU7 upgrade will also disable older version 4 transactions and integrate the Network Sustainability Mechanism (NSM), which is configured to preserve Zcash's existing halving schedule, with new supply reintroduction beginning in February 2031. Developers stated that the upgrade will not introduce new transaction formats, but full nodes, indexers, and block explorers may need to make adjustments. Zcash holders have overwhelmingly supported the proposed changes, with 98.9% backing halving preservation and 99.9% of the ZEC-weighted vote in favor of faster block times.