Deep Dive
1. Mainnet Node Software Upgrade (15 July 2025)
Overview: This was a critical, mandatory software update for all node operators. It prepared the network for the final shutdown of the legacy Horizen mainchain, ensuring a smooth transition to the new Base-based system.
The release, version ZEN 5.0.7, was made available via GitHub and Docker. It did not introduce a hard fork or new network features on the old chain. Its primary function was to maintain compatibility until the predetermined deprecation block (#1,783,180), after which the original blockchain ceased operations. This type of update is essential for coordinated network sunsets, preventing chain splits and ensuring all participants are on the same page for the migration.
What this means: This is neutral for ZEN as it was a necessary procedural step. It ensured the old network shut down cleanly, protecting users from confusion and potential loss of funds during the migration to the new ERC-20 token on Base.
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2. Consensus & Staking for Horizen 2.0 (8 November 2024)
Overview: This update finalized the core protocol mechanics for Horizen's reinvented architecture. It replaced the energy-intensive mining (Proof-of-Work) with a more efficient staking (Proof-of-Stake) model, fundamentally changing how the network is secured.
The team completed all preparation work for the AURA (Authority-Round) consensus algorithm. In this system, block producers (called collators) are selected based on their staked $ZEN, making the network more energy-efficient and allowing token holders to participate directly in security through staking. This work also included the complete design for migrating $ZEN from the old chain to the new one via a dedicated claim portal.
What this means: This is bullish for ZEN because it lays the foundation for a faster, greener, and more modern blockchain. It enables staking rewards for holders and is a crucial step in the project's strategic pivot to a scalable privacy appchain within the vibrant Base and Ethereum ecosystems.
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Conclusion
Horizen's latest codebase evolution shows a project executing a decisive architectural pivot, moving from an independent blockchain to a specialized, privacy-focused appchain integrated with Base and Ethereum. With core consensus work complete and the legacy network formally sunset, what will be the next major technical milestone for the Horizen 2.0 mainnet?