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Fair Sequencing Services: Enabling a Provably Fair DeFi Ecosystem

Blog post from Chainlink

Post Details
Company
Date Published
Author
Ari Juels
Word Count
1,780
Company Posts That Month
2
Language
English
Hacker News Points
-
Post removed?
No
Summary

Ethereum's increasing popularity due to tokenization, decentralized exchanges (DEXes), and decentralized finance (DeFi) has led to high gas prices, which in turn result in higher transaction costs and longer mining times. This environment makes transactions susceptible to front-running, where traders exploit the order of transactions for profit. This issue is exacerbated by Miner-Extractable Value (MEV), a phenomenon where miners can reorder transactions for maximum gain, leading to systemic unfairness. Chainlink Labs proposes the Fair Sequencing Service (FSS) to mitigate these issues by decentralizing transaction ordering through an oracle network, which sequences transactions based on criteria like time of arrival rather than gas price. FSS aims to ensure fairness in DeFi by leveraging oracle nodes to reorder transactions in a transparent manner, potentially lowering gas costs and preventing front-running. The service is designed to integrate with existing blockchain systems without requiring changes to the base layer, and it supports various ordering policies, including encryption techniques to combat front-running. Despite challenges, FSS aspires to make DeFi a more egalitarian and transparent financial system.

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