NU7 主网升级时间表确定
Zcash 开发者计划于 2026 年 11 月 5 日启动 NU7 主网升级,该日期取决于 10 月 20 日的最终审查结果。在此之前,NU7 测试网版本将于 10 月 6 日激活。
ZIP-218 提案提议将区块时间从 75 秒缩短至 25 秒,从而使区块产量增加两倍(即变为原来的三倍)。持有者投票决定保留现有的减半计划,而非切换到更平滑的发行曲线。此外,NU7 将禁用第 4 版交易,从而停止对旧版 Sprout 屏蔽池资金的进一步支出。
NU7 主网升级正式启动在即
Zcash 开发者已将 2026 年 11 月 5 日设定为 NU7 主网升级的目标日期,具体实施需待 10 月 20 日的最终审查通过。该计划由开发者 Sean Bowe 于 9 月 17 日发布在社区更新中确认。包括 Zcash 基金会、Project Tachyon、Valar Group、ZODL 和 Shielded Labs 在内的多个团队共同商定了此次升级的范围。
在主网上线之前,该升级将首先在测试网上运行。测试网激活定于 10 月 6 日。开发者计划观察测试网约两周时间,随后将在 10 月 20 日选择确切的激活高度。
Sean Bowe (@ebfull) 在 2026 年 9 月 17 日的推文中表示:“NU7 即将到来!继本周早些时候的情绪收集结果之后,所有 Zcash 开发组织已就下一次网络升级的内容和时间表达成一致意见。预计激活时间为 11 月 5 日左右。”
更快的区块与新的交易限制
NU7 的主要变化之一来自名为 ZIP-218 的提案。该提案建议将 Zcash 的区块时间从 75 秒缩短至 25 秒。这一改变意味着在相同时间内生成的区块数量将增加约三倍。由于每个区块的奖励相应减少以进行匹配,每日 ZEC 总发行量保持不变。
开发者指出,较短的区块时间有助于提升支付效率和交易所存款速度。需要等待确认的交易将比之前更快完成清算。
此次升级还设定了每个区块的新限制:每个区块最多允许包含 330 个总操作动作,其中包括上限为 330 个 Orchard 动作以及 25 个 Sprout JoinSplits。测试数据显示,Orchard 交易的吞吐量可能从每秒约 2.9 笔交易提升至 6.6 笔。在一种压力测试场景下,钱包同步带宽预计将从每天 271 MB 降至 169 MB。
更快的区块生成也带来了一些权衡。在一个拥有 99 个节点的测试网络中,产生陈旧区块(stale block)的比例为 4.86%,高于草案提案中预测的 3.26%。
Voting results shape upgrade direction
Zcash holders also voted on other parts of the plan. They chose to keep the current halving plan rather than switch to a smoother release curve, with support ratings approaching 98.9%.
Voters also decide when funds removed through the Network Sustainability Mechanism will be put back into circulation. Most of the support votes were for the February 2031 launch date. The development team agreed to follow the result, calling it the most cautious interpretation of the vote, and said the date could still be reviewed later.
NU7 will also turn off version 4 trading functions. This would prevent any further expenditures on funds from the old Sprout shielded pool, which currently holds less than 23,000 ZEC. It's worth noting that these Sprout funds will not be deleted, and developers retain the possibility of adding recovery options in the future.
September 30 is the next deadline for the project. Any features that are not completed by that date may be eliminated from the upgrade before testing begins.
Market reaction and price dynamics
During this governance process, ZEC prices rose significantly. Although the price increase cannot be attributed to NU7 alone, other news this month has also driven market volatility.
根据 CoinMarketCap 数据,9 月 18 日 ZEC 交易价格接近 1,485 美元,较前一交易日上涨约 9.6%,交易量超过 26 亿美元。早在 9 月初,随着 Grayscale 将其 Zcash Trust 转换为在 NYSE Arca 上市的交易所交易产品,ZEC 突破了 1,000 美元大关。该基金在推出时资产规模约为 3.04 亿美元,随后随着价格上涨进一步扩大规模。

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