no code implementations • 25 Apr 2023 • Yu Gai, Liyi Zhou, Kaihua Qin, Dawn Song, Arthur Gervais
This paper presents a dynamic, real-time approach to detecting anomalous blockchain transactions.
no code implementations • 10 Feb 2023 • Kaihua Qin, Jens Ernstberger, Liyi Zhou, Philipp Jovanovic, Arthur Gervais
Liquidations in Decentralized Finance (DeFi) are both a blessing and a curse -- whereas liquidations prevent lenders from capital loss, they simultaneously lead to liquidation spirals and system-wide failures.
no code implementations • 15 Jun 2021 • Kaihua Qin, Liyi Zhou, Yaroslav Afonin, Ludovico Lazzaretti, Arthur Gervais
To non-experts, the traditional Centralized Finance (CeFi) ecosystem may seem obscure, because users are typically not aware of the underlying rules or agreements of financial assets and products.
no code implementations • 11 Jun 2021 • Kaihua Qin, Liyi Zhou, Pablo Gamito, Philipp Jovanovic, Arthur Gervais
Moreover, we propose an optimal strategy that allows liquidators to increase their liquidation profit, which may aggravate the loss of borrowers.
no code implementations • 21 Apr 2021 • Ye Wang, Yan Chen, Haotian Wu, Liyi Zhou, Shuiguang Deng, Roger Wattenhofer
We find that traders have executed 292, 606 cyclic arbitrages over eleven months and exploited more than 138 million USD in revenue.
no code implementations • 14 Jan 2021 • Kaihua Qin, Liyi Zhou, Arthur Gervais
Our algorithm can replace unconfirmed transactions without the need to understand the victim transactions' underlying logic, which we estimate to have yielded a profit of 57, 037. 32 ETH (35. 37M USD) over 32 months of past blockchain data.
Cryptography and Security