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The Cost of Restaking vs. Proof-of-Stake

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  • Akaki Mamageishvili
  • Benny Sudakov

Abstract

We compare the efficiency of restaking and Proof-of-Stake (PoS) protocols in terms of stake requirements. First, we consider the sufficient condition for the restaking graph to be secure. We show that the condition implies that it is always possible to transform such a restaking graph into secure PoS protocols. Next, we derive two main results, giving upper and lower bounds on required extra stakes that one needs to add to validators of the secure restaking graph to be able to transform it into secure PoS protocols. In particular, we show that the restaking savings compared to PoS protocols can be very large and can asymptotically grow in the worst case as a square root of the number of validators. We also study a complementary question of transforming secure PoS protocols into an aggregate secure restaking graph and provide lower and upper bounds on the PoS savings compared to restaking.

Suggested Citation

  • Akaki Mamageishvili & Benny Sudakov, 2025. "The Cost of Restaking vs. Proof-of-Stake," Papers 2505.24440, arXiv.org.
    • Handle: RePEc:arx:papers:2505.24440
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    References listed on IDEAS

    as
    1. Abhimanyu Nag & Dhruv Bodani & Abhishek Kumar, 2025. "Economic Security of Multiple Shared Security Protocols," Papers 2505.03843, arXiv.org, revised May 2025.
    2. Tarun Chitra & Mallesh Pai, 2024. "How much should you pay for restaking security?," Papers 2408.00928, arXiv.org.
    3. Fahad Saleh & Wei Jiang, 2021. "Blockchain without Waste: Proof-of-Stake [Proof of Work vs Proof of Stake]," The Review of Financial Studies, Society for Financial Studies, vol. 34(3), pages 1156-1190.
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