Hi Insiders. This is Tuma, open-source reporter from the Insider Edition.
This week’s update features an interesting PR in ldk-node which aims to introduce support for applying Replace-By-Fee (RBF) to a splice transaction.
We also cover the latest movements in the BIP repository. Notably, a new BIP proposal for disposing of dust UTXOs has been assigned number 451.
We finally propose some more interesting news, such as recordings of Bitcoin++ Villain Edition, where developers discussed the most controversial things in Bitcoin, a new announcement by BDK founder Alekos Filini, and the new path forward for LDK.
Highlights from the bitcoin developer ecosystem
I spent 10+ hours in open-source developer calls in the Bitcoin ecosystem last week. Here is what caught my eye:
PR888 in ldk-node is adding support for splice RBF.
During the bi-weekly meeting, on Monday 27th, LDK contributors discussed PR888 in ldk-node by developer Jeffrey Czyz, which adds support in the Lightning implementation for splice RBF.
Replace-By-Fee (RBF) is a node policy that allows an unconfirmed transaction in the mempool to be replaced with a different transaction with a higher transaction fee.
PR888 adds a dedicated API that uses RBF to substitute an in-flight splice transaction with a new one with a higher feerate. This would allow the transaction to be mined faster, since the higher feerate makes it more attractive to miners.
A BIPs Update
In the last days there was some movement in the BIP repository. Specifically, one new BIP has been assigned a number by BIP maintainer Murchandamus.
Numbered BIPs
A list of BIPs that recently got assigned a number
BIP451: Dust UTXO Disposal Protocol
Assigned On: Apr 28th, 2026
Layer: Applications
PR2150 introduces BIP451, which describe a standard protocol to safely dispose of dust UTXOs by spending them to an OP_RETURN output with the entire value going to transaction fees. Dust attacks are a well-known threat for on-chain privacy. Attackers send a tiny UTXO (dust) to several addresses and, leveraging the common-input-ownership heuristic, links dust with other UTXOs belonging to the same wallet. While some mitigations are already in place to safeguard privacy, they are deemed insufficient. This BIP aims to fill this gap.
Other News from the Bitcoin World
Villains talking controversies: Check out the full recordings from Bitcoin++ Villain Edition. Developers gathered at the Hoover Dam to discuss the most controversial topics regarding the future of Bitcoin. Listen to Peter Todd discussing tail emission, take your side in the Oxford-style debate on quantum, and check out Core developer Brandon Black talking about how to break ossification.
Enclaved: Bitcoin developer Alekos Filini announced on X the launch of Enclavia, a new service that aims to bring hardware enclaves to every Bitcoin company for End-to-end encrypted computation and storage.
Run your LDK-based node: Spiral announced LDK Server, the new deployable Lightning node package with all the features developed by LDK. It ships with built-in LSP support, feature parity with the BOLTs specifications, and clean API for usage by non-developers.