- BNB Smart Chain activated the Pasteur hard fork on Tuesday, closing bridge verification and validator authorization gaps.
- The upgrade combines three proposals: BEP-682, BEP-695, and BEP-675, targeting duplicate validators, key rotation, and block submission.
- A new block-building route allows builders to submit pre-executed blocks, increasing throughput by about 88% in controlled tests.
- Pasteur follows prior hard forks that reduced block times from 1.5 seconds to 450 milliseconds.
BNB Smart Chain activated its Pasteur hard fork on Tuesday, closing bridge verification and validator authorization gaps while introducing a new route to fit more transactions into each block. BNB Chain confirmed that Pasteur is live on the BSC mainnet, strengthening bridge, staking, and governance security without altering the 450-millisecond block time.
The upgrade combines three BNB Evolution Proposals. BEP-682 rejects duplicate validator entries during cross-chain verification, while BEP-695 tightens controls on validator key rotation, slashing, and governance voting. Meanwhile, BEP-675 changes how builders submit blocks to validators.
Under the previous route, a builder executed transactions before submitting a proposed block, and the validator executed them again before signing. BNB Chain said the repeated work left blocks underfilled during the network’s 450-millisecond window.
BEP-675 allows builders to submit blocks they have already executed, with validators performing full execution verification after signing and broadcasting. In tests on an internal environment, the new route increased throughput by about 88%, from 1,237 to 2,324 transactions per second.
Average gas used per block rose from 46.35 million to 84.15 million, while the block interval and 100-million gas limit remained unchanged. BNB Chain cautioned that these figures came from a controlled test workload and are not mainnet measurements.
Pasteur follows previous upgrades centered on reducing block times. The Maxwell hard fork cut the average block time from 1.5 seconds to about 0.8 seconds in June 2025, and the subsequent Fermi upgrade brought it down to 450 milliseconds.
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