Front-Running Price Updates

Front-running price updates refers to the practice where an attacker observes a pending transaction that will update an oracle price and submits their own transaction with a higher gas fee to ensure it is processed first. By doing this, the attacker can execute trades based on the knowledge of the future price before the oracle update is reflected in the protocol.

This is a direct consequence of the public nature of the mempool in blockchain networks. This behavior undermines the fairness of the market and can be used to extract significant value from other participants.

Mitigating this requires the use of off-chain ordering, commit-reveal schemes, or privacy-preserving transaction technologies that hide the content of the transaction until it is included in a block.