# How Does a Proposer-Builder Separation (PBS) Architecture Aim to Solve This Issue? ⎊ Path

**Published:** 2025-12-04
**Author:** Greeks.live
**Categories:** Path

---

## How Does a Proposer-Builder Separation (PBS) Architecture Aim to Solve This Issue?

Proposer-Builder Separation (PBS) aims to mitigate issues like front-running and MEV centralization by splitting the roles of a validator. A "builder" specializes in constructing the most profitable block possible by ordering transactions.

A "proposer" (the validator chosen to create the next block) simply accepts the most profitable, pre-packaged block from a competitive market of builders without seeing the contents. This prevents the proposer from using their power to reorder transactions or steal MEV opportunities for themselves, while making access to MEV revenue more competitive.

- [How Does the Implementation of ‘Proposer-Builder Separation’ (PBS) Relate to Flashbots?](https://learn.greeks.live/path/how-does-the-implementation-of-proposer-builder-separation-pbs-relate-to-flashbots/)

- [What Is the Difference between a Block Proposer and a Block Builder in Ethereum’s PoS?](https://learn.greeks.live/path/what-is-the-difference-between-a-block-proposer-and-a-block-builder-in-ethereums-pos/)

- [How Does the Concept of ‘Proposer-Builder Separation’ (PBS) Relate to Flashbots?](https://learn.greeks.live/path/how-does-the-concept-of-proposer-builder-separation-pbs-relate-to-flashbots/)

- [How Does the Shift from Proof-of-Work to Proof-of-Stake Affect the Power of MEV Actors?](https://learn.greeks.live/path/how-does-the-shift-from-proof-of-work-to-proof-of-stake-affect-the-power-of-mev-actors/)

- [What Is the Relationship between a Block Builder and a Validator?](https://learn.greeks.live/path/what-is-the-relationship-between-a-block-builder-and-a-validator/)

- [How Is MEV Extraction Managed in Proof-of-Stake (PoS) Consensus Mechanisms?](https://learn.greeks.live/path/how-is-mev-extraction-managed-in-proof-of-stake-pos-consensus-mechanisms/)

- [How Do Searchers and Builders Interact in the MEV Supply Chain?](https://learn.greeks.live/path/how-do-searchers-and-builders-interact-in-the-mev-supply-chain/)

- [How Does the “Proposer-Builder Separation” (PBS) Model Enhance Security?](https://learn.greeks.live/path/how-does-the-proposer-builder-separation-pbs-model-enhance-security/)

## Glossar

### [Mev Centralization](https://learn.greeks.live/area/mev-centralization/?utm_source=crypto.greeks.live&utm_medium=referral&utm_campaign=satellite)

Concentration ⎊ MEV centralization describes the trend where the capability to extract Maximum Extractable Value becomes concentrated among a small number of specialized block builders or searchers, often due to superior infrastructure and proprietary algorithms.

### [Mev](https://learn.greeks.live/area/mev/?utm_source=crypto.greeks.live&utm_medium=referral&utm_campaign=satellite)

Extraction ⎊ Maximal Extractable Value, or MEV, refers to the profit that can be extracted by block producers through their ability to reorder, insert, or censor transactions within a block.

### [Architecture](https://learn.greeks.live/area/architecture/?utm_source=crypto.greeks.live&utm_medium=referral&utm_campaign=satellite)

Framework ⎊ Architecture within cryptocurrency, options trading, and financial derivatives represents the underlying computational and governance structures enabling decentralized finance (DeFi) protocols and the issuance, trading, and settlement of derivative contracts.

### [Proposer-Builder Separation (PBS)](https://learn.greeks.live/area/proposer-builder-separation-pbs/?utm_source=crypto.greeks.live&utm_medium=referral&utm_campaign=satellite)

Mechanism ⎊ Proposer-Builder Separation (PBS) represents a critical architectural refinement within blockchain systems, specifically designed to decouple the roles of proposing new blocks from the execution of those blocks, enhancing scalability and mitigating risks associated with Maximal Extractable Value (MEV).

### [Proposer](https://learn.greeks.live/area/proposer/?utm_source=crypto.greeks.live&utm_medium=referral&utm_campaign=satellite)

Role ⎊ A proposer in a Proof-of-Stake blockchain is a validator node selected to create and broadcast the next block to the network.

### [MEV-Boost](https://learn.greeks.live/area/mev-boost/?utm_source=crypto.greeks.live&utm_medium=referral&utm_campaign=satellite)

System ⎊ MEV-Boost is a specific implementation framework, often used in Proof of Stake networks, that facilitates the separation of duties between block builders, who construct optimized transaction bundles to maximize MEV, and block proposers, who select the most profitable bundle for inclusion.

## Discover More

### [How Does a Derivatives Exchange Assess the Economic Security of an Underlying Asset?](https://learn.greeks.live/path/how-does-a-derivatives-exchange-assess-the-economic-security-of-an-underlying-asset/?utm_source=crypto.greeks.live&utm_medium=referral&utm_campaign=satellite)
![How Does a Derivatives Exchange Assess the Economic Security of an Underlying Asset?](https://learn.greeks.live/wp-content/uploads/2025/10/Geometric-Cryptographic-Shard-Encapsulating-Decentralized-Finance-Volatility-Matrix-Optics.webp)

By evaluating the cost to attack the network (hash rate/market cap) and the asset's liquidity, which determines margin requirements and risk parameters.

### [How Does a Hybrid PoW/PoS System Determine the Block Proposer?](https://learn.greeks.live/path/how-does-a-hybrid-pow-pos-system-determine-the-block-proposer/?utm_source=crypto.greeks.live&utm_medium=referral&utm_campaign=satellite)
![How Does a Hybrid PoW/PoS System Determine the Block Proposer?](https://learn.greeks.live/wp-content/uploads/2025/10/Mechanized-Actuator-Deploying-Tangible-Asset-Proxy-for-Decentralized-Derivatives-Settlement-Execution.webp)

PoW determines the miner who proposes the block, while PoS validators then vote on and finalize the block for strong finality guarantees.

### [How Do Order-Book DEXs Attempt to Solve the Liquidity Problem without a Centralized Entity?](https://learn.greeks.live/path/how-do-order-book-dexs-attempt-to-solve-the-liquidity-problem-without-a-centralized-entity/?utm_source=crypto.greeks.live&utm_medium=referral&utm_campaign=satellite)
![How Do Order-Book DEXs Attempt to Solve the Liquidity Problem without a Centralized Entity?](https://learn.greeks.live/wp-content/uploads/2025/10/High-Fidelity-Macro-View-Optical-Disc-Read-Head-Scrutinizing-Digital-Asset-Settlement-Layer-Mechanisms.webp)

Order-book DEXs use off-chain relayers for matching and high incentives for market makers to aggregate liquidity without a centralized entity.

### [How Does a Short Put Differ from a Long Call in Terms of Payoff?](https://learn.greeks.live/path/how-does-a-short-put-differ-from-a-long-call-in-terms-of-payoff/?utm_source=crypto.greeks.live&utm_medium=referral&utm_campaign=satellite)
![How Does a Short Put Differ from a Long Call in Terms of Payoff?](https://learn.greeks.live/wp-content/uploads/2025/10/Intertwined-Cross-Sectional-Symmetry-of-Dual-Asset-Volatility-Surfaces-and-Hedging-Constructs.webp)

Short put: limited profit, substantial capped loss, benefits from time decay. Long call: limited loss, unlimited profit, benefits from upward movement.

### [What Is an "Oracle Update" and How Does It Relate to Contract Mutability?](https://learn.greeks.live/path/what-is-an-oracle-update-and-how-does-it-relate-to-contract-mutability/?utm_source=crypto.greeks.live&utm_medium=referral&utm_campaign=satellite)
![What Is an "Oracle Update" and How Does It Relate to Contract Mutability?](https://learn.greeks.live/wp-content/uploads/2025/10/Teal-Actuator-Aperture-Obscuring-Liquidity-Pool-Data-Feed-Integration-on-Dark-Chassis.webp)

Oracle updates feed price data; mutability allows developers to upgrade the underlying oracle integration logic for security or provider changes.

### [How Does Token Inflation Affect the Relationship between Circulating and Total Supply?](https://learn.greeks.live/path/how-does-token-inflation-affect-the-relationship-between-circulating-and-total-supply/?utm_source=crypto.greeks.live&utm_medium=referral&utm_campaign=satellite)
![How Does Token Inflation Affect the Relationship between Circulating and Total Supply?](https://learn.greeks.live/wp-content/uploads/2025/10/Stochastic-Volatility-Surface-Calibration-on-Degenerate-Leveraged-Token-Structures-Utilizing-Gamma-Hedging.webp)

Inflation increases circulating supply, diluting existing token value unless adoption growth is faster than the inflation rate.

### [How Does a "First-Seen Safe" RBF Proposal Attempt to Address the 0-Conf Security Issue?](https://learn.greeks.live/path/how-does-a-first-seen-safe-rbf-proposal-attempt-to-address-the-0-conf-security-issue/?utm_source=crypto.greeks.live&utm_medium=referral&utm_campaign=satellite)
![How Does a "First-Seen Safe" RBF Proposal Attempt to Address the 0-Conf Security Issue?](https://learn.greeks.live/wp-content/uploads/2025/10/Visualizing-Arbitrage-Equilibrium-Between-Layer-One-Blockchain-Volatility-And-Exotic-Option-Hedging-Strategies.webp)

FSS-RBF proposed allowing fee-bumping only if the replacement kept the exact same outputs, aiming to prevent malicious double-spends while speeding up transactions.

### [What Is 'Proof of Personhood' and How Does It Differ from KYC?](https://learn.greeks.live/path/what-is-proof-of-personhood-and-how-does-it-differ-from-kyc/?utm_source=crypto.greeks.live&utm_medium=referral&utm_campaign=satellite)
![What Is 'Proof of Personhood' and How Does It Differ from KYC?](https://learn.greeks.live/wp-content/uploads/2025/10/Two-Planar-Blades-Intersecting-Supporting-Spherical-Assets-Across-Volatility-Surfaces.webp)

PoP verifies unique humanity in a decentralized way; KYC verifies identity against government documents, centrally.

### [What Is Proposer-Builder Separation (PBS) in Ethereum's PoS?](https://learn.greeks.live/path/what-is-proposer-builder-separation-pbs-in-ethereums-pos/?utm_source=crypto.greeks.live&utm_medium=referral&utm_campaign=satellite)
![What Is Proposer-Builder Separation (PBS) in Ethereum's PoS?](https://learn.greeks.live/wp-content/uploads/2025/10/Decoupled-Cryptographic-Asset-Custody-Mechanism-Exhibiting-Interconnected-Data-Conduit-Structures.webp)

PBS separates the role of transaction ordering (builder) from block proposal (validator), aiming to decentralize MEV extraction and limit validator front-running.

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---

**Original URL:** https://learn.greeks.live/learn/how-does-a-proposer-builder-separation-pbs-architecture-aim-to-solve-this-issue/
