Token Spammers, Rug Pulls, and SniperBots: An Analysis of the Ecosystem of Tokens in Ethereum and the Binance Smart Chain (BNB)
Authors: Federico Cernera, Massimo La Morgia, Alessandro Mei, Francesco Sassi
Abstract: In this work, we perform a longitudinal analysis of the BNB Smart Chain and Ethereum blockchain from their inception to March 2022. We study the ecosystem of the tokens and liquidity pools, highlighting analogies and differences between the two blockchains. We estimate the lifetime of the tokens, discovering that about 60% of them are active for less than one day. Moreover, we find that 1% of addresses create an anomalous number of tokens (between 20% and 25%). We present an exit scam fraud and quantify its prevalence on both blockchains. We find that token spammers use short lifetime tokens as disposable tokens to perpetrate these frauds serially. Finally, we present a new kind of trader bot involved in these activities, and we detect their presence and quantify their activity in the exit scam operations.
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