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Game theoretical analysis of Atomic Cross-Chain Swaps

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Date
2020
Link to item file
https://hal.archives-ouvertes.fr/hal-02414356
Dewey
Informatique générale
Sujet
Escrow; Interoperability; Atomic swap; Blockchain technology
Conference name
40th IEEE International Conference on Distributed Computing Systems (ICDCS)
Conference date
12-2020
Conference city
Singapore
Conference country
Singapore
URI
https://basepub.dauphine.fr/handle/123456789/20909
Collections
  • LAMSADE : Publications
Metadata
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Author
Belotti, Marianna
Moretti, Stefano
989 Laboratoire d'analyse et modélisation de systèmes pour l'aide à la décision [LAMSADE]
Potop-Butucaru, Maria
Secci, Stefano
Type
Communication / Conférence
Abstract (EN)
In this paper we address the distributed cross-chain swap problem in the blockchain context where multiple agents exchange assets across multiple blockchain systems (e.g. trading Bitcoins for Litecoins or Ethers). We present a mathematical framework allowing to characterize blockchain swap protocols as the combination of a publishing and a commitment phase, where contracts are respectively published and then committed. We characterize the equilibria of existing cross-chain swap protocols (i.e., blockchain swap protocols exchanging assets among different blockchains). More precisely, we prove that following a swap protocol characterized by concurrent publishing of exchange contracts and snap (immediate) assets transfers is a Nash equilibrium. Furthermore, we prove that for protocols with a sequential publishing and commitment of the assets transfers, following the prescribed protocol is a sub-game perfect equilibrium.

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