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Documents authored by Krishnamachari, Bhaskar

Document
DOI: 10.4230/OASIcs.FAB.2021.3
DAISIM: A Computational Simulator for the MakerDAO Stablecoin

Authors: Shreyas Bhat, Ayten Betul Kahya, Bhaskar Krishnamachari, and Rohit Kumar

Published in: OASIcs, Volume 92, 4th International Symposium on Foundations and Applications of Blockchain 2021 (FAB 2021)

Abstract
We present a computational simulation of the single-collateral DAI stablecoin launched by the MakerDAO project in 2017. At the core of the simulation is a model of cryptocurrency investors acting as rational Markowitz mean-variance portfolio optimizers, with heterogeneous risk tolerance. The simulator, called DAISIM, incorporates automated order matching and price update mechanisms to determine the DAI price. We use the simulator to evaluate how the single-collateral DAI price, as well as portfolio allocations, vary for a given population of investors as a function of exogenous parameters such as the price of ETH and various system parameters including stability rate and transaction fee. DAISIM is being made available as open-source and may be useful in evaluating other similar projects.
Cite as

Shreyas Bhat, Ayten Betul Kahya, Bhaskar Krishnamachari, and Rohit Kumar. DAISIM: A Computational Simulator for the MakerDAO Stablecoin. In 4th International Symposium on Foundations and Applications of Blockchain 2021 (FAB 2021). Open Access Series in Informatics (OASIcs), Volume 92, pp. 3:1-3:13, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2021)

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@InProceedings{bhat_et_al:OASIcs.FAB.2021.3,
  author =	{Bhat, Shreyas and Kahya, Ayten Betul and Krishnamachari, Bhaskar and Kumar, Rohit},
  title =	{{DAISIM: A Computational Simulator for the MakerDAO Stablecoin}},
  booktitle =	{4th International Symposium on Foundations and Applications of Blockchain 2021 (FAB 2021)},
  pages =	{3:1--3:13},
  series =	{Open Access Series in Informatics (OASIcs)},
  ISBN =	{978-3-95977-196-2},
  ISSN =	{2190-6807},
  year =	{2021},
  volume =	{92},
  editor =	{Gramoli, Vincent and Sadoghi, Mohammad},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/OASIcs.FAB.2021.3},
  URN =		{urn:nbn:de:0030-drops-139899},
  doi =		{10.4230/OASIcs.FAB.2021.3},
  annote =	{Keywords: Stablecoin, Simulator, MakerDAO}
}
Document
DOI: 10.4230/OASIcs.FAB.2021.5
Dynamic Curves for Decentralized Autonomous Cryptocurrency Exchanges

Authors: Bhaskar Krishnamachari, Qi Feng, and Eugenio Grippo

Published in: OASIcs, Volume 92, 4th International Symposium on Foundations and Applications of Blockchain 2021 (FAB 2021)

Abstract
One of the exciting recent developments in decentralized finance (DeFi) has been the development of decentralized cryptocurrency exchanges that can autonomously handle conversion between different cryptocurrencies. Decentralized exchange protocols such as Uniswap, Curve and other types of Automated Market Makers (AMMs) maintain a liquidity pool (LP) of two or more assets constrained to maintain at all times a mathematical relation to each other, defined by a given function or curve. Examples of such functions are the constant-sum and constant-product AMMs. Existing systems however suffer from several challenges. They require external arbitrageurs to restore the price of tokens in the pool to match the market price. Such activities can potentially drain resources from the liquidity pool. In particular dramatic market price changes can result in low liquidity with respect to one or more of the assets and reduce the total value of the LP. We propose in this work a new approach to constructing the AMM by proposing the idea of dynamic curves. It utilizes input from a market price oracle to modify the mathematical relationship between the assets so that the pool price continuously and automatically adjusts to be identical to the market price. This approach eliminates arbitrage opportunities and, as we show through simulations, maintains liquidity in the LP for all assets and the total value of the LP over a wide range of market prices.
Cite as

Bhaskar Krishnamachari, Qi Feng, and Eugenio Grippo. Dynamic Curves for Decentralized Autonomous Cryptocurrency Exchanges. In 4th International Symposium on Foundations and Applications of Blockchain 2021 (FAB 2021). Open Access Series in Informatics (OASIcs), Volume 92, pp. 5:1-5:14, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2021)

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@InProceedings{krishnamachari_et_al:OASIcs.FAB.2021.5,
  author =	{Krishnamachari, Bhaskar and Feng, Qi and Grippo, Eugenio},
  title =	{{Dynamic Curves for Decentralized Autonomous Cryptocurrency Exchanges}},
  booktitle =	{4th International Symposium on Foundations and Applications of Blockchain 2021 (FAB 2021)},
  pages =	{5:1--5:14},
  series =	{Open Access Series in Informatics (OASIcs)},
  ISBN =	{978-3-95977-196-2},
  ISSN =	{2190-6807},
  year =	{2021},
  volume =	{92},
  editor =	{Gramoli, Vincent and Sadoghi, Mohammad},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/OASIcs.FAB.2021.5},
  URN =		{urn:nbn:de:0030-drops-139911},
  doi =		{10.4230/OASIcs.FAB.2021.5},
  annote =	{Keywords: Decentralized Exchange, Automated Market Maker, Decentralized Finance, Dynamic Curves}
}
Document
DOI: 10.4230/DagRep.7.7.1
Foundations of Wireless Networking (Dagstuhl Seminar 17271)

Authors: Christina Fragouli, Magnús M. Halldórson, Kyle Jamieson, and Bhaskar Krishnamachari

Published in: Dagstuhl Reports, Volume 7, Issue 7 (2018)

Abstract
This report documents the talks and discussions of Dagstuhl Seminar 17271 "Foundations of Wireless Networking". The presented talks represent a wide spectrum of work on wireless networks.
Cite as

Christina Fragouli, Magnús M. Halldórson, Kyle Jamieson, and Bhaskar Krishnamachari. Foundations of Wireless Networking (Dagstuhl Seminar 17271). In Dagstuhl Reports, Volume 7, Issue 7, pp. 1-21, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2018)

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@Article{fragouli_et_al:DagRep.7.7.1,
  author =	{Fragouli, Christina and Halld\'{o}rson, Magn\'{u}s M. and Jamieson, Kyle and Krishnamachari, Bhaskar},
  title =	{{Foundations of Wireless Networking (Dagstuhl Seminar 17271)}},
  pages =	{1--21},
  journal =	{Dagstuhl Reports},
  ISSN =	{2192-5283},
  year =	{2018},
  volume =	{7},
  number =	{7},
  editor =	{Fragouli, Christina and Halld\'{o}rson, Magn\'{u}s M. and Jamieson, Kyle and Krishnamachari, Bhaskar},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/DagRep.7.7.1},
  URN =		{urn:nbn:de:0030-drops-84209},
  doi =		{10.4230/DagRep.7.7.1},
  annote =	{Keywords: wireless networks}
}
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