Zcash NU7 upgrade has been activated, approximately 12,200 ZEC temporarily unspendable
Original headlineZcash NU7 升级已激活，约 1.22 万枚 ZEC 暂无法花费
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Zcash activated its NU7 network upgrade at block height 3,543,405, which rejects version 4 transactions—the only format capable of spending funds from the legacy Sprout privacy pool—leaving roughly 12,224 ZEC (about $15 million) temporarily unspendable. The tokens were not burned, and access could be restored in a future upgrade, though that is not guaranteed. NU7 also cuts the target block interval from 75 seconds to 25 seconds and introduces a sustainability mechanism that removes 60% of transaction fees from circulation for later reissuance via mining rewards. The change matters because it strands a meaningful pool of older shielded funds while reshaping Zcash's issuance and fee economics. What to watch next is whether a future upgrade re-enables Sprout spending and how the faster block times and fee mechanism affect network usage.
Muhabbit's AI wrote this summary in its own words from TechFlow's report and translated it from Chinese. It can get details wrong, so check the source.
Named in this story
ZEC (ZEC), Zcash (ZEC), Sprout, Cointelegraph
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