  The advent of Ethereum 2.0 has introduced significant changes, particularly
the shift to Proof-of-Stake consensus. This change presents new opportunities
and challenges for arbitrage. Amidst these changes, we introduce BriDe
Arbitrager, a novel tool designed for Ethereum 2.0 that leverages
Bribery-driven attacks to Delay block production and increase arbitrage gains.
The main idea is to allow malicious proposers to delay block production by
bribing validators/proposers, thereby gaining more time to identify arbitrage
opportunities. Through analysing the bribery process, we design an adaptive
bribery strategy. Additionally, we propose a Delayed Transaction Ordering
Algorithm to leverage the delayed time to amplify arbitrage profits for
malicious proposers. To ensure fairness and automate the bribery process, we
design and implement a bribery smart contract and a bribery client. As a
result, BriDe Arbitrager enables adversaries controlling a limited (< 1/4)
fraction of the voting powers to delay block production via bribery and
arbitrage more profit. Extensive experimental results based on Ethereum
historical transactions demonstrate that BriDe Arbitrager yields an average of
8.66 ETH (16,442.23 USD) daily profits. Furthermore, our approach does not
trigger any slashing mechanisms and remains effective even under Proposer
Builder Separation and other potential mechanisms will be adopted by Ethereum.
