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DOI: 10.4230/LIPIcs.DISC.2019.27

Stellar Consensus by Instantiation

Authors: Giuliano Losa, Eli Gafni, and David Mazières

Published in: LIPIcs, Volume 146, 33rd International Symposium on Distributed Computing (DISC 2019)

Abstract

Stellar introduced a new type of quorum system called a Federated Byzantine Agreement System. A major difference between this novel type of quorum system and a threshold quorum system is that each participant has its own, personal notion of a quorum. Thus, unlike in a traditional BFT system, designed for a uniform notion of quorum, even in a time of synchrony one well-behaved participant may observe a quorum of well-behaved participants, while others may not. To tackle this new problem in a more general setting, we abstract the Stellar Network as an instance of what we call Personal Byzantine Quorum Systems. Using this notion, we streamline the theory behind the Stellar Network, removing the clutter of unnecessary details, and refute the conjecture that Stellar’s notion of intact set is optimally fault-tolerant. Most importantly, we develop a new consensus algorithm for the new setting.

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Giuliano Losa, Eli Gafni, and David Mazières. Stellar Consensus by Instantiation. In 33rd International Symposium on Distributed Computing (DISC 2019). Leibniz International Proceedings in Informatics (LIPIcs), Volume 146, pp. 27:1-27:15, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2019)

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@InProceedings{losa_et_al:LIPIcs.DISC.2019.27,
  author =	{Losa, Giuliano and Gafni, Eli and Mazi\`{e}res, David},
  title =	{{Stellar Consensus by Instantiation}},
  booktitle =	{33rd International Symposium on Distributed Computing (DISC 2019)},
  pages =	{27:1--27:15},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-126-9},
  ISSN =	{1868-8969},
  year =	{2019},
  volume =	{146},
  editor =	{Suomela, Jukka},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.DISC.2019.27},
  URN =		{urn:nbn:de:0030-drops-113343},
  doi =		{10.4230/LIPIcs.DISC.2019.27},
  annote =	{Keywords: Consensus, Stellar, Partial Synchrony, Byzantine Fault Tolerance}
}

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Stellar Consensus by Instantiation

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