Replace-by-Fee

Replace-by-fee is a feature that allows a user to replace a pending transaction in the mempool with a new version that has a higher fee. By broadcasting a new transaction with the same nonce but a higher gas price, the user effectively incentivizes validators to prioritize the new transaction over the old one.

This is a crucial tool for traders who need to accelerate the confirmation of a time-sensitive order that is currently stuck due to low initial fees. It helps mitigate the risks associated with mempool congestion and fluctuating market conditions.

From a systems risk perspective, this mechanism provides a necessary escape hatch for users during market crashes or rapid price shifts. It is an essential component of professional-grade crypto trading software and wallet interfaces.