What is the Lorentz Hard Fork?
The Lorentz hard fork is a major network upgrade for Binance Smart Chain (BSC), part of the BNB Chain ecosystem. Scheduled to be activated on BSC mainnet on April 29, 2025 (after its deployment to testnet in early April), the upgrade introduces several significant changes intended to enhance transaction speed, network responsiveness, and overall blockchain performance
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Key Features and Changes
- Shortened Block Interval: The centerpiece of the Lorentz hard fork is implementation of BEP-520, which reduces the block interval from 3 seconds to 1.5 seconds. This enables faster transaction confirmations and improves the network’s responsiveness1235+1.
- Epoch and Turn Adjustments: The epoch length is increased from 200 to 500, and the "Consecutive TurnLength" is expanded from 4 to 8—these adjustments are designed to better handle validator rotations under the new, faster timing13.
- Gas Limit Changes: The per-block GasLimit is reduced from 140M to 70M. Although each block contains less gas overall, the increased frequency keeps the network’s throughput roughly unchanged while smoothing out load and congestion spikes13.
- MEV and Network Improvements: The hard fork makes the maximum bids per builder per block (MEV auctions) configurable, fixes certain concurrency bugs, adds new network and monitoring metrics, and updates cryptographic elements to patch known vulnerabilities123.
- Ecosystem Impact: By reducing block and transaction times, BNB Chain aims to improve scalability, address past congestion issues, and foster new types of applications and trading strategies within its ecosystem456.
Roadmap Context and Future Upgrades
Lorentz is part of the BNB Chain’s broader 2025 roadmap, which focuses on increasing speed and efficiency. It follows the Pascal hard fork (mid-March 2025) and precedes the upcoming Maxwell hard fork (planned for June 2025, aiming for even faster block intervals of 0.75 seconds)
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Required Actions
- Node Operators: Full node operators must upgrade to the specified software version (BSC v1.5.10 on mainnet) before the fork activation time to remain compatible with the network3.
- Developers: dApp developers should ensure their smart contract operations and infrastructure are tested for seamless performance under the new, shorter block intervals4.
In summary, the Lorentz hard fork is a major technical milestone that accelerates block production on BNB Chain, aiming to support higher transaction rates and a smoother user experience for both developers and end-users
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