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How Does the Proof-of-Stake Consensus Model Affect the Power of Validators in MEV?

The Proof-of-Stake (PoS) consensus model significantly centralizes the power of validators in MEV extraction compared to Proof-of-Work (PoW). In PoS, the chosen validator (block proposer) has complete control over which transactions to include and how to order them within their proposed block.

This explicit control gives the validator the final say on all MEV extraction, including front-running, making them the ultimate beneficiaries. This has led to the development of Proposer-Builder Separation (PBS) to decentralize this power and mitigate the risk of validator-led MEV abuse.

What Is the Potential Impact of Validator Collusion on the Fairness of Transaction Ordering?
How Does the Shift from Proof-of-Work to Proof-of-Stake Affect the Power of MEV Actors?
What Is the Difference between a Miner and a Validator in Transaction Ordering?
What Is the “Proposer-Builder Separation (PBS)” Model in PoS and How Does It Affect MEV?