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Certifying functional correctness of Ethereum smart contracts

This research focuses on the challenge of certifying the functional correctness of Ethereum smart contracts—guaranteeing that a contract strictly follows its sp

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Abstract

This research focuses on the challenge of certifying the functional correctness of Ethereum smart contracts—guaranteeing that a contract strictly follows its specification. Moving beyond traditional ‘bug-finding’ methods, this paper proposes a methodology to rigorously prove that the code implementation of a contract is logically equivalent to its intended business logic. The authors discuss the implementation of a formal verification pipeline that uses automated solvers to check for functional consistency. This approach is highly relevant for decentralized finance, where a minor discrepancy between intended and actual behavior can result in massive financial loss. The study presents case studies on established protocols, demonstrating how mathematical proofs can confirm that a contract handles state transitions correctly under all conditions. By moving the goalpost from ‘no bugs’ to ‘mathematically verified correctness,’ the authors contribute to the development of higher-assurance standards for the Ethereum ecosystem. The work is significant for its role in advancing the transition toward institutional-grade smart contracts, where clear, auditable, and provable functional correctness is a prerequisite for broader adoption and integration into traditional financial infrastructures. Authors: Tsankov, P., Drachsler-Guevgenova, D., Gervais, A., Vechev, M. Publication: Academic Paper Publication date: 2022-01-01

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Key findings

  • Functional correctness provides a higher security guarantee than standard vulnerability checking.
  • Formal methods can mathematically prove the consistency of complex contract business logic.
  • Automated solvers are becoming efficient enough for practical verification of smart contracts.
  • Proving state transition accuracy is essential for high-assurance financial applications.

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Citation

Tsankov, P., Drachsler-Guevgenova, D., Gervais, A., Vechev, M. (2022). Certifying functional correctness of Ethereum smart contracts. Academic Paper. https://www.sri.inf.ethz.ch/research/blockchain-security
Canonical knowledge ID: research:certifying-functional-correctness-of-ethereum-smart-contracts