License: Creative Commons Attribution 4.0 International license (CC BY 4.0)
When quoting this document, please refer to the following
DOI: 10.4230/OASIcs.FMBC.2022.1
URN: urn:nbn:de:0030-drops-171827
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Bartoletti, Massimo

MEV-Freedom, in DeFi and Beyond (Invited Talk)

OASIcs-FMBC-2022-1.pdf (0.3 MB)


Maximal Extractable Value (MEV) refers to a class of recent attacks on public blockchains, where adversaries with the power to reorder, drop or insert transactions in a block can "extract" value from user transactions in the mempool. Empirical research has shown that mainstream DeFi protocols, like e.g. Automated Market Makers and Lending Pools, are massively targeted by MEV attacks. This has detrimental effects on their users, on transaction fees, and on the congestion of blockchain networks. Despite the growing knowledge on MEV attacks on blockchain protocols, an exact definition is still missing. Indeed, formally defining these attacks is an essential prerequisite to the design of provably secure, MEV-free blockchain protocols. In this talk, we propose a formal definition of MEV, based on a general, abstract model of blockchains and smart contracts. We then introduce MEV-freedom, a property enjoyed by contracts resistant to MEV attacks. We validate this notion by rigorously proving that Automated Market Makers and Lending Pools are not MEV-free. We finally discuss how to design MEV-free contracts.

BibTeX - Entry

  author =	{Bartoletti, Massimo},
  title =	{{MEV-Freedom, in DeFi and Beyond}},
  booktitle =	{4th International Workshop on Formal Methods for Blockchains (FMBC 2022)},
  pages =	{1:1--1:1},
  series =	{Open Access Series in Informatics (OASIcs)},
  ISBN =	{978-3-95977-250-1},
  ISSN =	{2190-6807},
  year =	{2022},
  volume =	{105},
  editor =	{Dargaye, Zaynah and Schneidewind, Clara},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{},
  URN =		{urn:nbn:de:0030-drops-171827},
  doi =		{10.4230/OASIcs.FMBC.2022.1},
  annote =	{Keywords: Blockchain, Smart Contracts, Formal Security Notion}

Keywords: Blockchain, Smart Contracts, Formal Security Notion
Collection: 4th International Workshop on Formal Methods for Blockchains (FMBC 2022)
Issue Date: 2022
Date of publication: 06.10.2022

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