Bitcoin Core developers are discussing the removal of the explicit Replace-by-Fee (RBF) signal in Bitcoin wallets. Previously, this allowed users to mark transactions as replaceable so they could later increase the fee and speed up confirmation.
The need for this feature disappeared after the full-RBF policy became the network standard. Nodes now automatically treat any transaction as potentially replaceable by a more expensive version, regardless of whether the user enabled the corresponding flag.
As a result, the legacy mechanism has become an unnecessary piece of code that can expose wallet information by leaving extra traces for blockchain analysis.
“Eliminating this redundancy became the main reason for the proposal to remove the BIP125 signaling from the Bitcoin Core wallet,” wrote developer rkrux.
The Issue of Privacy
Developers note that dropping the signal by simply deleting the field will not work. The protocol requires every transaction to contain a specific sequence value for each input.
Community member Murch explained that different ways of disabling the signaling could lead to the opposite effect.
“If wallets start using different values, their transactions will noticeably differ from one another and become easier to track on the network,” he emphasized.
For this reason, developers are leaning toward a unified approach. According to discussion participants, about 75% of transactions already use the same sequence value option. Therefore, sticking to common practice is considered the safest solution rather than implementing custom RBF processing schemes.