CPFP (Child Pays for Parent)
Transactions● Common
A fee bumping technique where a new transaction spending an unconfirmed output pays enough fees to incentivize miners to confirm both transactions. The child's high feerate raises the effective feerate of the package. Useful when you can't RBF the original transaction.
Technical Notes
Miners evaluate packages by ancestor feerate. Child must pay fees for both transactions. CPFP is output-based (recipient can bump); RBF is input-based (sender can bump). Package relay and CPFP carve-out rules enable Lightning anchor outputs.
Metadata
Visibility: Public
Created:1/3/2026by System