SoK: Liquid Staking Tokens (LSTs) and Emerging Trends in Restaking

2024-03-31

AI Summary

This paper systematically investigates the economic mechanisms and technical architectures of Liquid Staking Tokens (LSTs) and Liquid Restaking Tokens (LRTs), analyzing their integrated impact on token valuation, market performance, and protocol security. Employing a Systematization of Knowledge (SoK) methodology, it combines formal modeling, on-chain empirical analysis, and cross-protocol comparative evaluation to establish the first standardized assessment framework for LSTs/LRTs. Key contributions include: (1) identifying trade-off pathways among liquidity, yield, and security induced by core design choices—such as validator selection, reward distribution, and slashing policies; (2) quantifying statistically significant correlations between on-chain market performance metrics (e.g., TVL, APR volatility, slippage) and underlying protocol parameters across major LSTs; and (3) introducing a novel multi-layered risk taxonomy specific to LRTs, accompanied by governance-oriented mitigation strategies. The findings provide both theoretical foundations and actionable guidelines for designing, evaluating, and regulating the DeFi staking ecosystem.

Technology Category

• Multiagent Systems: Mechanism Design
• Game Theory and Economic Paradigms: Mechanism Design
• Reasoning under Uncertainty: Stochastic Optimization

Application Category

• Economics, Online Markets and Human Computation: Incentives in network design for Web infrastructures and ecosystems
• Security and Privacy: Blockchains and distributed ledgers
• Search and Retrieval-Augmented AI: Web evaluation methodologies and metrics

Abstract

Liquid staking and restaking represent recent innovations in Decentralized Finance (DeFi) that garnered user interest and capital. Liquid Staking Tokens (LSTs), tokenized representations of staked tokens on Proof-of-Stake (PoS) blockchains, are the leading staking method. LSTs offer users the ability to earn staking rewards while maintaining liquidity, enabling seamless integration into DeFi protocols and free tradeability. Restaking builds upon this concept by allowing staked tokens, LSTs or native Bitcoin tokens to secure additional protocols and PoS chains for supplementary rewards. Liquid Restaking Tokens (LRTs) unlock liquidity of restaked assets. This Systematization of Knowledge (SoK) establishes a comprehensive framework for the technical and economic models of liquid staking protocols. Using this framework, we systematically compare protocols mechanics, including node operator selection, staking reward distribution, and slashing. Our empirical analysis of token performance reveals that protocol design and market dynamics impact token market value. We further present the recent developments in restaking and discuss associated risks and security implications. Lastly, we review the emerging literature on liquid staking and restaking.

Problem

• Liquidity Staking Tokens
• Liquid Restaking Tokens
• Decentralized Finance Risk

Innovation

• Liquid Staking Tokens
• DeFi Applications
• Stake Mechanism Analysis