Hi Insiders. This is Tuma, open-source reporter from the Insider Edition.
In this week update we feature the latest release of Stratum V2 protocol and applications, which focuses on share accounting improvements, channel-management API refinements, and protocol/specification alignment.
We also cover the latest release of Core-lightning. v26.06 starts deprecation for the pay command in favor of xpay, brings the implementation up-to-date with the latest specs changes, and fixes some bugs.
We finally present a new BIP for sharing the UTXO set between peers and other interesting news from the Bitcoin ecosystem. Notably, Olaoluwa Osuntokun discussing post-quantum updates to BIP324, researcher Conduition becoming the first Brink grantee to work to make Bitcoin quantum secure, and some thoughts from the Lightning Dev Summit in Vienna.
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:
v1.10.0 of Stratum V2 protocol libraries and v0.5.0 of Stratum V2 applications have been released.
During the weekly call, on Tuesday 2nd, Stratum V2 contributors announced that the new releases for both the protocol libraries and the applications were ready to be published. The new versions were later released on Wednesday 3rd.
v1.10.0 of the core libraries improves share accounting, adding possibility to track rejected mining shares, refines APIs for channel-management, simplifying the public API and improving encapsulation, and fixes some misalignment between the protocol and the specifications.
v0.5.0 of the application libraries integrates the changes from the core protocol crate. Moreover, it introduces improvements to the Translator Proxy and the Job Declaration Client.
v26.06 of Core-lightning, called “Quantum-Resistant Lightning Channel” is now available.
During the latest update calls, Core-lightning contributors discussed the features to be included in the new version of the Lightning implementation. The release was finally published on Tuesday 2nd.
v26.06 starts deprecation for the
paycommand in favor ofxpay, defaulting to the latter for managing payments, it increases the channel closure wait time to 72 blocks, updating to the latest specs, and introduces an experimental BOLT12 payment proof implementation updated to latest spec draft.The release also fixes some issues. Notably, it fixes a problem with high fees that caused that caused
spliceinandspliceoutto abort, a wallet change output bug for P2TR/P2WPKH, and some issues related toxpaycommand.
A BIPs Update
In the last week 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
BIP452: P2P UTXO Set Sharing
Authors: Fabian Jahr
Assigned On: Jun 4th, 2026
Layer: Peer Services
PR2137 introduces BIP452, which introduces the possibility to share the UTXO set over the P2P layer. The proposal defines a way to improve the assumeUTXO feature by providing a way for new nodes to receive the UTXO set directly from peers, instead of from external sources. In particular, it introduces a new service bit, four new P2P messages, and a UTXO set merkle root known to the requesting node, to verify the correctness of the provided UTXO set.
Other News from the Bitcoin World
Post-quantum BIP324: Olaoluwa Osuntokun posted to the Bitcoin-Dev mailing list his thoughts on possible upgrades needed to make BIP324 quantum secure. BIP324 introduced transport encryption for the P2P protocol, enabling peers to exchange messages on the network with improved privacy and security. This could be an easier first step to make Bitcoin quantum secure than pushing changes at the consensus level.
Quantum researcher: Bitcoin researcher Conduition announced that he had received a grant from Brink, making him the first grantee to be funded for R&D work to bring post-qauntum cryptography to Bitcoin. He will work full-time in collaboration with Blockstream Research to draft a balanced, efficient, and secure signature upgrade.x
What’s next for Lightning?: Lightning contributor Vincenzo Palazzo posted some takeaways on what was discussed during the Lightning Dev Summit in Vienna. Moreover, Nifty posted the summit resolutions on GitHub, highlighting the next steps for the Lightning Network.
Looking for an opportunity to join up with some bitcoin devs in person? Join us in Nairobi this June 17- 19 to talk about working in public in open-source!