Relay_Station / Zone_39
TECH
25.08.2026
BNB Smart Chain Activates Pasteur Hard Fork, Bolstering Security and Throughput
The Pasteur upgrade bundles three distinct protocol enhancements, formally introduced via meta-proposal BEP-673. Central to its security overhaul is BEP-682, a measure specifically crafted to block duplicate validator signatures during cross-chain bridge verification. This closes a critical vulnerability that could have otherwise allowed malicious actors to feign additional voting weight and compromise bridge integrity.
Complementing these bridge safeguards, BEP-695 mandates that retired validator keys definitively lose their authority, preventing any lingering control from decommissioned entities. Furthermore, it ensures that governance votes rigorously respect blacklisted addresses, thereby strengthening the network's overall resistance to coordinated attacks and maintaining the integrity of its decentralized governance mechanisms.
Beyond security, Pasteur directly improves execution efficiency through BEP-675, which now permits block builders to submit blocks that are already fully executed. This innovation grants block builders increased latitude to pack more transactions into each block before the network’s stringent time limits are met. Testnet simulations prior to activation demonstrated a marked improvement, with throughput rising from approximately 1,237 transactions per second (TPS) to 2,324 TPS. Average block gas usage also climbed from roughly 46 million to 84 million, operating comfortably within the 100 million gas limit, all while maintaining a consistent 450-millisecond block time.
The philosophy behind Pasteur notably diverges from the scaling strategies observed in some rival networks. While Ethereum, for instance, has increasingly focused on expanding Layer 2 rollups and parallel execution to achieve higher Layer 1 capacity, BNB Smart Chain's Pasteur directly optimizes its native Layer 1 execution. This approach is tailored to deliver sub-second finality and sub-cent fees natively, a critical advantage for retail traders and high-frequency decentralized applications that seek minimal latency without relying on secondary bridging solutions.
For the vast majority of BNB holders and application users, the Pasteur activation required no direct action; wallets remained unchanged, and smart contracts did not necessitate redeployment. However, node operators were tasked with updating their client software to version 1.7.7, removing any deprecated configuration flags, and confirming their bridge and validator services were running the updated logic before the 02:30 UTC switch. These preemptive measures ensured a smooth transition across the network's decentralized infrastructure.
Pasteur is the latest in a series of strategic upgrades for the BNB Chain in 2026. Earlier this year, the Fermi upgrade in January had already reduced block times to a rapid 450 milliseconds, with the Osaka and Mendel updates by April locking in a benchmark throughput near 5,200 TPS and pushing in-memory finality down to about 650 milliseconds. The network's ambitious roadmap includes plans to double mainnet throughput again in the second half of 2026, alongside better resource isolation, and anticipates a testnet launch for a next-generation Layer 1 blockchain aimed at agentic trading by year-end.
This continuous, targeted enhancement of core Layer 1 capabilities underscores a persistent belief within the BNB ecosystem that direct protocol optimization remains crucial for mass adoption. How these foundational improvements will translate into a sustained surge of decentralized application innovation and a broader expansion of its user base, particularly amidst a fiercely competitive Web3 landscape, remains a key question for the months ahead.
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