rtuck99
commented
7 years ago +1 for this, I am waiting on transactions after sweeping my wallet from multibit classic. This feature is needed in order to support use cases where as a recipient the user is waiting on a transaction, especially as miner fees are increasing
Child-Pays-For-Parent
This might be a good way to help with the 'fee is too low - tx stuck forever' problem of spam attacks.
Andreas Schildbach is working on it: https://bitcointalk.org/index.php?topic=1123464.0
I have seen him post in bitcoinj something about it too IIRC.
In usability terms it wouldn't be too bad - something like 'Bump this transaction by adding more fee' or something. With an extra tx that just adds fee and sends change back to wallet.