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Documents authored by Sorensen, Derek

Artifact
Software
DOI: 10.4230/artifacts.23081
FinCert

Authors: Derek Sorensen

Abstract
Cite as

Derek Sorensen. FinCert (Software, Source code). Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2025)

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@misc{dagstuhl-artifact-23081,
   title = {{FinCert}}, 
   author = {Sorensen, Derek},
   note = {Software (visited on 2025-05-16)},
   url = {https://github.com/dhsorens/FinCert/tree/FMBC-25},
   doi = {10.4230/artifacts.23081},
}
Document
DOI: 10.4230/OASIcs.FMBC.2025.11
Formally Specifying Contract Optimizations with Bisimulations in Coq

Authors: Derek Sorensen

Published in: OASIcs, Volume 129, 6th International Workshop on Formal Methods for Blockchains (FMBC 2025)

Abstract
The efficacy of formal verification of smart contracts depends on being able to correctly specify and carry out the verification of optimized code. However, code optimized for performance is rarely optimized for intelligibility, which can make formally verifying optimized code difficult and costly. To address this issue, we present a formal tool for reasoning about an optimized contract in terms of its reference implementation. This tool reduces the work of formally verifying an optimized contract to proving behavioral equivalence to the reference implementation.
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Derek Sorensen. Formally Specifying Contract Optimizations with Bisimulations in Coq. In 6th International Workshop on Formal Methods for Blockchains (FMBC 2025). Open Access Series in Informatics (OASIcs), Volume 129, pp. 11:1-11:13, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2025)

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@InProceedings{sorensen:OASIcs.FMBC.2025.11,
  author =	{Sorensen, Derek},
  title =	{{Formally Specifying Contract Optimizations with Bisimulations in Coq}},
  booktitle =	{6th International Workshop on Formal Methods for Blockchains (FMBC 2025)},
  pages =	{11:1--11:13},
  series =	{Open Access Series in Informatics (OASIcs)},
  ISBN =	{978-3-95977-371-3},
  ISSN =	{2190-6807},
  year =	{2025},
  volume =	{129},
  editor =	{Marmsoler, Diego and Xu, Meng},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/OASIcs.FMBC.2025.11},
  URN =		{urn:nbn:de:0030-drops-230382},
  doi =		{10.4230/OASIcs.FMBC.2025.11},
  annote =	{Keywords: smart contract verification, formal methods, interactive theorem prover, smart contract upgradeability}
}
Artifact
Software
DOI: 10.4230/artifacts.22478
FinCert

Authors: Derek Sorensen

Abstract
Cite as

Derek Sorensen. FinCert (Software, Source Code). Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2024)

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@misc{dagstuhl-artifact-22478,
   title = {{FinCert}}, 
   author = {Sorensen, Derek},
   note = {Software, swhId: \href{https://archive.softwareheritage.org/swh:1:dir:a0d8499f935e75e7076b33b666898752e27cbf3d;origin=https://github.com/dhsorens/FinCert;visit=swh:1:snp:0cbe1a324310e49b943e1e64ae9a3df868a009a6;anchor=swh:1:rev:5fe1e6d94ac519890d1dac0d283b3969fc84bb1a}{\texttt{swh:1:dir:a0d8499f935e75e7076b33b666898752e27cbf3d}} (visited on 2024-11-28)},
   url = {https://github.com/dhsorens/FinCert},
   doi = {10.4230/artifacts.22478},
}
Document
DOI: 10.4230/OASIcs.FMBC.2024.7
Towards Formally Specifying and Verifying Smart Contract Upgrades in Coq

Authors: Derek Sorensen

Published in: OASIcs, Volume 118, 5th International Workshop on Formal Methods for Blockchains (FMBC 2024)

Abstract
Smart contract upgrades are costly from a verification perspective and can be a meaningful source of vulnerabilities when done incorrectly. Unfortunately, there is no established, formal framework through which one can reason about contracts as they undergo upgrades, though much work has been done to verify standalone smart contracts. Instead, one must repeat the full verification process for each contract upgrade, something which relies heavily on fallible intuition, can lead to unexpected vulnerabilities, and drives up the cost of formally verifying smart contracts. We propose a formal framework for contract upgrades in ConCert, a Coq-based smart contract verification tool. Central to this framework is our notion of a contract morphism, a theoretical tool which we introduce to formally encode structural relationships between smart contracts, and with which we can formally specify and verify an upgraded contract relative to its previous versions. We argue that ours is a natural framework for specifying and verifying contract upgrades, and hope to offer a first step towards rigorous, efficient specification and verification of contract upgrades.
Cite as

Derek Sorensen. Towards Formally Specifying and Verifying Smart Contract Upgrades in Coq. In 5th International Workshop on Formal Methods for Blockchains (FMBC 2024). Open Access Series in Informatics (OASIcs), Volume 118, pp. 7:1-7:14, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2024)

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@InProceedings{sorensen:OASIcs.FMBC.2024.7,
  author =	{Sorensen, Derek},
  title =	{{Towards Formally Specifying and Verifying Smart Contract Upgrades in Coq}},
  booktitle =	{5th International Workshop on Formal Methods for Blockchains (FMBC 2024)},
  pages =	{7:1--7:14},
  series =	{Open Access Series in Informatics (OASIcs)},
  ISBN =	{978-3-95977-317-1},
  ISSN =	{2190-6807},
  year =	{2024},
  volume =	{118},
  editor =	{Bernardo, Bruno and Marmsoler, Diego},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/OASIcs.FMBC.2024.7},
  URN =		{urn:nbn:de:0030-drops-198728},
  doi =		{10.4230/OASIcs.FMBC.2024.7},
  annote =	{Keywords: smart contract verification, formal methods, interactive theorem prover, smart contract upgrades}
}
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