The Case of FBA as a DEX Processing Model

• URL: http://arxiv.org/abs/2302.01177v5
• Date: Sun, 16 Feb 2025 02:03:20 GMT
• Title: The Case of FBA as a DEX Processing Model
• Authors: Tiantian Gong, Zeyu Liu, Aniket Kate,
• Abstract summary: Continuous processing matches each incoming transaction against the current order book. discrete processing executes transactions discretely in batches with a uniform price double auction. We find that imposes less welfare loss and provides better liquidity than continuous processing in typical scenarios.
• Score: 10.997808313373675
• License:
• Abstract: We investigate the welfare loss of continuous and discrete order matching models in blockchain-based decentralized exchanges (DEX) that utilize order books to record outstanding orders. Continuous processing matches each incoming transaction against the current order book. The discrete processing model, i.e., frequent batch auction (FBA), executes transactions discretely in batches with a uniform price double auction: Orders are first matched according to price, then the exact transaction order if competing orders specify the same price. We find that FBA imposes less welfare loss and provides better liquidity than continuous processing in typical scenarios, e.g., when few parties are privately informed about asset valuations. Even otherwise, it achieves better social welfare and liquidity provision in the following settings: when price takers and public information reflecting asset value changes arrive sufficiently frequently compared to private information, when the priority fees (for faster transaction inclusion into blockchains) are small, or when the market is more balanced on both buy and sell sides. Our empirical analysis on the BTC-USD and ETH-USD transactions on a DEX named dYdX indicates that FBA can reduce transaction costs by $21\%-37\%$.

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