Bitcoin Core v30 and libbitcoinkernel with The Charlatan (bitcoin core dev) | SLP696

Oct 24, 2025

In this discussion, The Charlatan, a Bitcoin Core developer and project lead for the Bitcoin Kernel initiative, dives into the highlights of Bitcoin Core version 30. He shares insights on removing the legacy wallet to cut technical debt and the aims of the Bitcoin Kernel project for modular code. They explore the ongoing data carrier size controversy and its balance with network performance, plus enhancements in initial block download times. The conversation also touches on evolving fee policies and the importance of competition among different Bitcoin implementations.

Ask episode

AI Snips

Chapters

Transcript

Episode notes

INSIGHT

Spam Filters Versus Network Health

Aggressively policing data embedding trades off spam reduction against network performance and long-term viability.
Requiring frequent anti-spam updates risks fragmenting the network and harming Bitcoin as money.

INSIGHT

Not Catering To A Single Startup

Concerns about specific startups (e.g., Citraea) influencing policy are unfounded; they were used only as examples of data-embedding protocols.
Protocols will embed data one way or another, so policy changes don't uniquely enable a single actor.

ADVICE

Use Local Policy Knobs

Configure policy options locally if you disagree with default relay rules; set data carrier size or permit flags to zero if desired.
Use node-level policy knobs to express your preferences rather than expecting a universal default to match you.

Get the Snipd Podcast app to discover more snips from this episode

Get the app

In this episode, Stephan Livera discusses the latest developments in Bitcoin Core with The Charlatan, focusing on the significant updates in version 30, including the removal of the legacy wallet, preparations for the Great Consensus Cleanup, and the introduction of the Bitcoin Kernel project.

The conversation also covers the implications of alternative implementations, the ongoing data carrier size controversy, evolving fee rate policies, and improvements in initial block download times. Additionally, they touch on the future of the Bitcoin Core GUI and the importance of competition in the Bitcoin ecosystem.

Takeaways:

🔸Bitcoin Core version 30 introduces significant updates, including a new mining IPC interface.

🔸The legacy wallet is being removed to reduce technical debt and improve code maintenance.

🔸Preparations for the Great Consensus Cleanup are underway to address long-standing bugs.

🔸The Bitcoin Kernel project aims to separate consensus code for better modularity.

🔸Alternative implementations of Bitcoin are encouraged to foster competition and innovation.

🔸The data carrier size controversy highlights the balance between spam prevention and network performance.

🔸Fee rate policies are evolving in response to market dynamics and miner behavior.

🔸Improvements in initial block download times are ongoing, enhancing user experience.

🔸Address indexing features are being considered to improve wallet usability.

🔸The Bitcoin Core GUI is undergoing updates to better serve user needs.

Timestamps:

(00:00) - Intro

(01:30) - Major updates in Bitcoin Core version 30.0

(04:58) - Why is the legacy wallet being removed?

(09:07) - The preparation for the Great Consensus Cleanup

(13:25) - What is the libbitcoinkernel project?

(17:36) - Alternate Bitcoin node implementations

(23:46) - Sponsors

(25:09) - What is the future of competing Bitcoin clients?

(31:56) - Charlatan’s views on controversies surrounding Data carrier size

(37:50) - Is Bitcoin Core serving the interests of few?

(45:45) - What is the impact of Fee Rate Policies?

(53:00) - Dust limits & DOS concerns

(54:45) - What are the enhancements for Lightning Network transactions?

(57:16) - How bad could mining centralization get if left unchecked?; Libre relay and Transaction filtering

(1:03:00) - What are the concerns of illegal content in Bitcoin?

(1:05:45) - What is the most underappreciated aspect of Bitcoin development?

(1:11:10) - Reducing dependencies in Bitcoin Core

(1:14:00) - What are the possible future developments in Bitcoin Core?

(1:22:42) - What will be the role of competition in Bitcoin implementations?

(1:26:00) - Address indexing & Wallet improvements

(1:30:08) - Closing thoughts

Links:

https://x.com/the_charlatan_

Sponsor:

CoinKite.com (code LIVERA)

Stephan Livera links: