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what is the Pascal Hard Fork

What is the Pascal Hard Fork?

Overview

The Pascal Hard Fork is a major network upgrade on the BNB Chain (Binance Smart Chain), activated on March 20, 2025. The purpose of this upgrade was to enhance the network's performance, Ethereum compatibility, smart contract functionality, and fee efficiency. Node operators were required to upgrade to BSC v1.5.7 prior to the activation12.

Key Features and Changes

The Pascal Hard Fork introduced several major improvements and upgrades, including:
  • Ethereum Compatibility: Implemented features from several Ethereum Improvement Proposals (EIPs):
    • BEP-439: Enabled BLS12-381 curve operations (for streamlining multi-signature verification).
    • BEP-440: Historical block hashes accessible from state (improves data availability).
    • BEP-441: EOA account code — supports native smart contract wallets (aligned with EIP-7702).
    • BEP-466: Compatible block format with EIP-7685.
    • BEP-496: Increased calldata cost per EIP-7623.
  • Smart Contract Wallets: Native support, allowing features like spending limits, batch transactions, and enhanced multisig security31.
  • Gas Fee Optimization and Batch Transactions: Improved transaction efficiency and reduced network fees4.
  • SystemContract Upgrade: Code cleanup and simplifications after the prior BC-Fusion release51.
  • Performance Enhancements: Increased effective GasLimit (to ~140M), improved block proposal selection, and refined transaction pool handling2.
  • Smart Payment Interfaces: New ways for users and dapps to interact with payments on-chain4.

Network and Ecosystem Impact

  • The BNB Chain saw an increase in DEX activity and transaction volume, capturing over 30% of DEX market share post-fork.
  • The network generated daily fees exceeding $1.6 million since the hard fork, outpacing Bitcoin’s fee growth during the same period.
  • Price action for BNB moved near historical resistance, suggesting possible bullish momentum if technical levels are breached4.
  • The roadmap includes two future hard forks—Lorentz (April 2025) and Maxwell (June 2025)—to further reduce block time (to 1.5s and 0.75s, respectively)43.

Node Operator Guidance

All node operators were required to upgrade their full nodes to BSC v1.5.7 before March 20, 2025. Failure to do so would result in nodes being dropped from consensus and unable to interact with the upgraded chain12.

Summary Table

UpgradeKey ChangeBNB Chain BEP/EIP
BLS12-381 SupportMulti-sig signature aggregationBEP-439 / EIP-2537
Smart Contract ACsNative smart contract wallets, EOA codeBEP-441 / EIP-7702
Block Data AccessHistorical block hash retrievalBEP-440 / EIP-2935
Block FormatEIP-7685 compatibilityBEP-466 / EIP-7685
Calldata CostIncreased calldata cost for spam protectionBEP-496 / EIP-7623
SystemContractSimplified, cleaned up codeInternal
Gas Fee/GasLimitOptimization, increase to ~140MInternal
1435+1
In summary:
The Pascal Hard Fork was a major upgrade for BNB Chain, making it a more competitive, Ethereum-compatible, and efficient smart contract platform with native smart contract wallet support and improved transaction throughput. Node operators and users benefited from lower fees, higher speeds, and enhanced network capabilities1435+1.
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