[BIP Proposal] Removal of BIP 125 RBF signalling in wallet transactions

In the realm of Bitcoin development, a significant update has been proposed regarding the handling of Replace-by-Fee (RBF) signaling within the Bitcoin Core wallet. The idea is to eliminate the BIP 125 RBF signaling in transactions. This change is being considered because, since the adoption of full RBF as the default setting in Bitcoin Core nodes starting with version 28.0, the specific signaling for BIP 125 has become obsolete.

A pull request has already been initiated to effect this modification. During the review process of this pull request, concerns were voiced about the default input sequence number that should be adopted following the removal of BIP 125 signaling. It was suggested that any new default should align with what is considered best practice by the broader wallet developer community. This discussion underscores the need for a consensus on standards that accommodate all stakeholders in the ecosystem.

Additionally, there is an ongoing plan to publish an informational Bitcoin Improvement Proposal (BIP) that will suggest a recommended input sequence number for transactions. This forthcoming proposal aims to standardize practices across different implementations and ensure a smooth transition away from the current method of RBF signaling.

The feedback from various wallet developers is crucial in shaping these decisions, ensuring broad agreement and minimal disruption to users. The changes are poised to streamline processes and enhance the functionality of Bitcoin transactions, reflecting the evolving needs of the network and its users.

[0]: BIP 125

[1]: Pull Request on GitHub

[2]: Discussion Point

[3]: Future Informational BIP