Zcash activated its NU7 upgrade on the public testnet at canonical block 4,465,026 on October 4, bringing a reduction in target block spacing from 75 seconds to 25 seconds into live consensus testing. The activation arrived ahead of the previously expected October 6 timing, while a proposed November 5 mainnet rollout remains under review.
NU7 activates at testnet block 4,465,026
NU7 activated on Zcash’s public testnet at 18:21:45 UTC on October 4, according to the ZecBlock record for canonical block 4,465,026; the canonical designation places its rules on the active public-testnet chain.
The activation came before the expected October 6 timing, CoinDesk reported. Testnet activation does not itself activate NU7 on Zcash mainnet; CoinDesk reported that the November 5 mainnet target remains subject to a developer decision after testing.
25-second target blocks enter live consensus testing
A Zcash Foundation Community Forum post covering Zebra 7.0.0 RC 0 says NU7 activates new consensus rules on the public testnet and cuts Zcash's target block spacing from 75 seconds to 25 seconds.
Developers can use the deployment to assess the revised block timing and accompanying NU7 consensus changes before deciding whether to activate them on mainnet.
Developers will review results on October 20
Developers are scheduled to review testnet results on October 20 before deciding whether to proceed with mainnet activation, Crypto.news reported. That review is the next stated decision point for the proposed November 5 rollout.
For now, NU7's 25-second target and new rules are confined to public testnet. The outcome of the October 20 review will determine whether the still-provisional mainnet schedule moves forward.
