BNB Chain Developers posted on X that BEP-675 proposes an adjustment to the MEV building process on BSC. The central change described in the post is the removal of validator-side bid simulation from BSC’s MEV path. The proposal focuses on the execution stage inside the block-building and validation flow, where repeated transaction execution currently sits on the critical path.
Validator-side bid simulation would be removed
According to BNB Chain Developers, the existing process involves re-executing every transaction twice. BEP-675 proposes a different workflow: validators would no longer perform that simulation step on their side. Instead, they would receive a BidBlock submitted by the builder. The execution results in that BidBlock would already be precomputed by the builder, allowing the validator to seal the block directly.
The post frames this as reclaiming one full EVM pass from the critical path. In practical terms, the public description does not introduce additional actors beyond the builder and validator roles mentioned in the announcement. The builder precomputes the execution results, sends a BidBlock, and the validator uses that BidBlock for direct sealing rather than re-running each transaction again.
Gas ceiling and builder competition window
BNB Chain Developers listed two impacts for BEP-675. The first is a roughly 50% higher gas limit ceiling. The stated reason is that the proposal removes a full EVM execution pass from the critical path. This figure was presented directly in the developer account’s post as an expected effect of reclaiming that execution step.
The second listed impact concerns the builder competition window. Under the proposed flow, the builder competition window extends from about 30% to about 45% of the block interval. The announcement connects this change to the same workflow adjustment: builders provide precomputed execution results in the BidBlock, and validators seal directly instead of repeating the transaction simulation process.
Official developer account points to the BEP-675 materials
The BNB Chain Developers post also directed readers to learn about BEP-675 through a GitHub link shown as github.com/bnb-chain/BEPs…. The post was made by BNB Chain Developers, the account shown as @BNBChainDevs. The page displayed the timestamp as 20:00 on June 20, 2026, and showed 475 views.
The item was carried by Foresight as a 7X24H newsflash and is based on the BNB Chain Developers update. Based on the published text, the proposal’s scope is specifically tied to BSC’s MEV path, BidBlock submission, precomputed execution results by builders, direct sealing by validators, and the two numerical effects stated in the post: an approximately 50% higher gas limit ceiling and an increase in the builder competition window from around 30% to around 45% of the block interval.