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Home»ADOPTION NEWS»Exploring proposer-builder separation and its impact on blockchain centralization
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Exploring proposer-builder separation and its impact on blockchain centralization

By Crypto FlexsOctober 28, 20242 Mins Read
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Exploring proposer-builder separation and its impact on blockchain centralization
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Rebecca Moen
October 26, 2024 09:32

Proposer-Builder Separation (PBS) aims to alleviate validator centralization in blockchains, but this can lead to builder centralization. Find insights in Agostino Capponi’s research.





Proposer-Builder Separation and Blockchain Dynamics

In the evolving blockchain technology landscape, the concept of proposer-builder separation (PBS) has emerged as a potential solution to reduce centralization among validators. This framework, introduced by Ethereum, seeks to create a competitive market by separating the roles of block proposal and block construction. This allows builders to create blocks and provide validators with a bidding fee for inclusion in the blockchain. According to a16z Crypto, this approach aims to strengthen decentralization by giving validators the option to accept blocks from the highest-bidding builder, regardless of size.

Challenges of blockchain centralization

Despite the potential of PBS to alleviate validator centralization, Columbia University’s Agostino Capponi highlights a new centralization trend within the builder market. With advanced internal search capabilities, builders can gain a competitive advantage, capture order flow at lower costs, and dominate the block construction space. This phenomenon, described as the “MEV proof” paradigm, suggests that the ability to efficiently capture and leverage extractable value is becoming increasingly important for constructing blocks of value.

Insights from Agostino Capponi

Agostino Capponi, a professor at Columbia University and director of the Columbia Center for Digital Finance and Technology, has studied financial technology and market microstructure extensively. His work, funded by renowned institutions such as NSF and Ethereum Foundation, explores the complexities of blockchain dynamics and the implications of PBS. Capponi’s contributions to the field have been recognized with awards such as the 2018 NSF CAREER Award and the J.P. Morgan AI Research Faculty Award.

Introduction to a16z Cryptography Research

a16z Crypto Research operates as a multidisciplinary lab, working with portfolio companies to solve critical challenges in the blockchain space. Their efforts focus on advancing the science and technology of the next generation of the Internet and contribute to the broader understanding and development of decentralized systems.

Image source: Shutterstock


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