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Smart Contract Synthesis Modulo Hyperproperties

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posted on 2024-03-20, 10:27 authored by Norine CoenenNorine Coenen, Bernd FinkbeinerBernd Finkbeiner, Jana Hofmann, Julia TillmanJulia Tillman
Smart contracts are small but highly security-critical programs that implement wallets, token systems, auctions, crowd funding systems, elections, and other multi-party transactions on the blockchain. A broad range of methods has been developed to ensure that a smart contract is functionally correct. However, smart contracts often additionally need to satisfy certain hyperproperties, such as symmetry, determinism, or an information flow policy. In this paper, we show how a synthesis method for smart contracts can ensure that the contract satisfies its desired hyperproperties. We build on top of a recently developed synthesis approach from specifications in the temporal logic TSL. We present HyperTSL, an extension of TSL for the specification of hyperproperties of infinite-state software. As a preprocessing step, we show how to detect if a hyperproperty has an equivalent formulation as a (simpler) trace property. Finally, we describe how to refine a synthesized contract to adhere to its HyperTSL specification.

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Primary Research Area

  • Reliable Security Guarantees

Open Access Type

  • Green

BibTeX

@misc{Coenen:Finkbeiner:Hofmann:Tillman:2022, title = "Smart Contract Synthesis Modulo Hyperproperties", author = "Coenen, Norine" AND "Finkbeiner, Bernd" AND "Hofmann, Jana" AND "Tillman, Julia", year = 2022, month = 8, doi = "10.48550/arxiv.2208.07180" }

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