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Towards Verifying Ethereum Smart Contracts at Intermediate Language Level

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Formal Methods and Software Engineering (ICFEM 2019)

Part of the book series: Lecture Notes in Computer Science ((LNPSE,volume 11852))

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Abstract

Smart contracts have exhibited great potential in a spectrum of applications, ranging from digital currency to online gaming. Yet smart contracts are known to be prone to errors and vulnerable to attacks. The validation of smart contracts before their deployment is an indispensable step for their correctness and security, and the highest level of guarantee can be provided using formal verification. The level of difficulty, reliability, etc., of the formal verification of a smart contract is deeply affected by the programming language in which the contract is implemented. In this paper, we discuss the benefits of verifying smart contracts at the level of intermediate languages, in comparison with machine-level languages and user-level languages. We augment the existing formalization of Yul – the intermediate language of Ethereum, realize an ERC20 token contract in this language, and verify the guarantees of all the functions provided by this contract. All this development has been performed in the proof assistant Isabelle/HOL. It demonstrates the feasibility and some of the most important advantages of mechanized verification for smart contracts at the intermediate-language level, such as a balance between the intuitiveness of the verification target and the ability to validate lower-level mechanisms like the function dispatcher.

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Acknowledgments

This work was supported by the National Key R&D Plan (2017YFB1301100), National Natural Science Foundation of China (61876111, 61572331, 61602325), Capacity Building for Sci-Tech Innovation – Fundamental Scientific Research Funds (025185305000), and the Youth Innovative Research Team of Capital Normal University. We thank the anonymous reviewers for their valuable comments that helped with the improvement of this paper.

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Authors and Affiliations

  1. Beijing Key Laboratory of Electronic System Reliability and Prognostics, Capital Normal University, Beijing, China

    Ximeng Li, Zhiping Shi & Ning Han

  2. Beijing Engineering Research Center of High Reliable Embedded System, Capital Normal University, Beijing, China

    Qianying Zhang & Guohui Wang

  3. Beijing Advanced Innovation Center for Imaging Theory and Technology, Capital Normal University, Beijing, China

    Ximeng Li & Yong Guan

  4. International Science and Technology Cooperation Base of Electronic System Reliability and Mathematical Interdisciplinary, Capital Normal University, Beijing, China

    Yong Guan

Authors
  1. Ximeng Li
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  2. Zhiping Shi
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  4. Guohui Wang
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  5. Yong Guan
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  6. Ning Han
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Corresponding authors

Correspondence to Ximeng Li or Zhiping Shi .

Editor information

Editors and Affiliations

  1. IRIT/INPT - ENSEEIHT, Toulouse, France

    Yamine Ait-Ameur

  2. Teesside University, Middlesbrough, UK

    Shengchao Qin

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Li, X., Shi, Z., Zhang, Q., Wang, G., Guan, Y., Han, N. (2019). Towards Verifying Ethereum Smart Contracts at Intermediate Language Level. In: Ait-Ameur, Y., Qin, S. (eds) Formal Methods and Software Engineering. ICFEM 2019. Lecture Notes in Computer Science(), vol 11852. Springer, Cham. https://doi.org/10.1007/978-3-030-32409-4_8

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  • DOI: https://doi.org/10.1007/978-3-030-32409-4_8

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  • Online ISBN: 978-3-030-32409-4

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