Term

CPFP

A fee-bumping technique where a new transaction spends an unconfirmed output and pays a high fee to incentivize miners to include both.

Type:

mempool

fee

transaction

Also known as:

Child Pays For Parent

definition

CPFP lets a receiver (or sender) spend an unconfirmed output with a high-fee child, pulling the low-fee parent into a block as a package so miners collect enough total fees. Useful when the original transaction cannot be replaced via RBF.

tip

Some wallets expose CPFP as "accelerate" or "unstick"
Works across chains that support package relay and mining

All terms and definitions may update as the Cryptionary improves.