Developers of the privacy-focused cryptocurrency Zcash (ZEC) have reached a significant milestone in the network's evolution with the submission of the Network Upgrade 7 (NU7) mainnet activation proposal. Submitted by developer Sean Bowe, the proposal suggests setting the activation height at block 3,543,405, which is projected to occur on November 5, 2024. This upgrade represents a technical shift aimed at improving transaction speeds and modifying the economic incentives within the ecosystem.
Enhanced Throughput and Economic Adjustments
The primary technical improvement introduced in NU7 is the dramatic reduction of the target block interval. The network intends to transition from the current 75-second block time to a 25-second interval. This change is designed to increase transaction throughput and provide faster finality for users. Furthermore, the upgrade introduces a new mechanism regarding network costs.
- Transaction Speed: Reducing latency by two-thirds to improve the user experience for ZEC transfers.
- Fee Management: Implementation of a rule to temporarily remove 60% of transaction fees from active circulation.
- Consensus Agreement: The protocol details were finalized during a ZIP (Zcash Improvement Proposal) editing meeting.
Critical Migration and Security Changes
A key aspect of NU7 involves the retirement of older protocol features. The upgrade will disable v4 transactions, a move that has direct implications for users holding assets in the legacy Sprout privacy pool. Once the activation height is reached, funds remaining in the Sprout pool will be rendered unspendable.
Holders of assets within the Sprout shielded pool must migrate their funds to newer pools, such as Sapling or Orchard, prior to the November 5th deadline to maintain accessibility.
This deprecation is part of a broader effort to streamline the Zcash codebase and eliminate technical debt associated with the blockchain's earliest privacy implementations.
While the activation height has been agreed upon by core developers, the proposal is currently awaiting its final merger into the official upgrade specifications and the release of updated node software. This procedural step is necessary before miners and node operators can begin the transition to the new protocol version. The Zcash community is encouraged to monitor the official repository for the release of the compatible client software to ensure network stability during the November transition.
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