FAQs

1. Why is the MEV solution important for the BNB Chain ecosystem?

BNB Chain’s MEV solution leverages Proposer Builder Separation (PBS) architecture to foster a more transparent and fair block space market. Through PBS, users gain the power to select their preferred builder for transaction submission, while MEV rewards are equitably distributed among searchers, validators, builders, and BNB stakers. This approach promotes transparency, fairness, user choice, and network security. By distributing rewards across various roles, BNB Chain encourages wider participation and reduces the risk of centralization, to build a decentralized and inclusive blockchain ecosystem.

2. Do builders fetch the in-turn proposer’s GasCeil to build block？

Yes, you could using RPC mev_params to query validator’s MEV information before building block, it can help to 1) calculate a valid header with gas no more than GasCeil; 2) calculate the left bidding time by BidSimulationLeftOver; 3) calculate suitable builderFee by validatorCommission.

3. How does the validator choose the best bid?

The block reward is calculated as gasFee, the validator reward is calculated as gasFee*commissionRate - builderFee. Every time the validator receives a new bid, it will compare its reward with the existing best bid. If it has better block reward and validator reward, the new bid will go into simulation. If simulation succeeds before block sealing, it will be compared with local mined block reward. If the bid’s block reward and validator reward are both superior to the local block, it will be sealed by the validator.

4. Who can become the builder?

BNB Chain is a permission-less ecosystem, anyone who implements the standard builder API could be the BNB Chain builder.

5. Where can I find the BNB Chain builders information?

You can find the BNB Chain builders through a public builder info repo

6. How many validators have been integrated with the builders?

You can find the validators that has implemented the PBS solution from validator info repo

7. Where can I find the BNB Chain MEV statistic dashboard?

You can view the MEV statistics from MEV Stats Dashboard