Bitcoin TLDR

#76

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Summary

Apr 14 - Apr 19, 2025

Our weekly newsletter is focused on keeping you updated on what's new in Bitcoin, and summarizes the bitcoin-dev, lightning-dev and delving bitcoin mailing lists

Gloria Zhao announces the release of Bitcoin Core version 29.0, featuring performance improvements, bug fixes, and new functionalities such as -natpmp for better IPv4 and IPv6 support, alongside a significant shift from Autotools to CMake in the build system, aimed at enhancing the software's development process. Users are advised to follow specific upgrade procedures based on their operating system and to consult the official release notes for detailed information on all changes, including adjustments to P2P networking, mining, and the introduction of new RPCs to improve developer interactions with Bitcoin Core.

Jonas Nick, Tim Ruffing, and Yannick Seurin introduce DahLIAS, an innovative cryptographic protocol allowing for constant-size, interactive aggregate signatures compatible with secp256k1. This advancement, detailed in their published paper, presents a significant step forward in reducing transaction sizes and verification costs for Bitcoin and similar applications, marking a key development in the efficiency and scalability of cryptographic practices within digital currency systems.

A debate surrounding the moderation guidelines in the Bitcoin Core metadata repository has emerged, with proponents arguing for the removal of such policies citing concerns over formal governance structures potentially influencing consensus rules. This discussion, fueled by references to decentralized development philosophies and legal considerations like the Berne Convention, underscores the tension between maintaining civility within the community and adhering to the foundational principle of decentralization. The dialogue encapsulates a broader discourse on the balance between structured governance and the anarchic ethos that has historically underpinned Bitcoin's development community, as detailed in this forum post.

Active Discussions

Post Quantum Signatures and Scaling Bitcoin

7 replies

By Pieter Wuille

Involving Ethan Heilman, Brandon Black+3 others

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Original post on April 4, 2025 16:29 UTC

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Last reply on April 14, 2025 19:35 UTC

bitcoin-dev

  • PQ cryptographic schemes may increase blockchain size but offer lower computation costs.

  • Pre-aggregation of transactions could disrupt in-mempool transaction replacement, affecting scalability.

  • It may force a choice between transaction sets, potentially undermining decentralization in mining.

Relax OP_RETURN standardness restrictions

6 replies

By Sjors Provoost

Involving Antoine Poinsot, Antoine Riard+3 others

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Original post on April 17, 2025 18:52 UTC

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Last reply on May 14, 2025 15:54 UTC

bitcoin-dev

  • Discussions suggest revisiting Bitcoin's OP_RETURN size limits due to evolving protocols.

  • The debate includes removing size limits entirely, accommodating new cryptographic needs.

  • The importance of adapting to blockchain's evolution and protocol development was emphasized.

Great Consensus Cleanup Revival

82 replies

By AntoineP

Involving ajtowns, evoskuil+14 others

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Original post on March 24, 2024 19:53 UTC

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Last reply on April 21, 2025 14:57 UTC

delvingbitcoin

  • Bitcoin side-system vulnerabilities pose severe risks, including faked SPV proofs.

  • Developers' lack of awareness about specific flaws leads to critical security breaches.

  • A consensus on invalidating 64-byte transactions aims to mitigate these risks effectively.

How to linearize your cluster

71 replies

By sipa

Involving stefanwouldgo, Lagrang3+6 others

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Original post on December 20, 2023 03:59 UTC

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Last reply on May 12, 2025 12:25 UTC

delvingbitcoin

  • SFL is preferred over GGT for transaction clustering due to its practical benefits.

  • SFL provides an anytime algorithm, equitable load distribution, and requires simpler integer precision.

  • Despite its advantages, SFL's lack of complexity bounds and optimization criteria poses challenges.

How CTV+CSFS improves BitVM bridges

12 replies

By ajtowns

Involving JeremyRubin, 1440000bytes+5 others

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Original post on April 10, 2025 14:28 UTC

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Last reply on April 29, 2025 18:10 UTC

delvingbitcoin

  • A new cryptocurrency transaction method using CTV protocol was discussed, emphasizing specific spending conditions.

  • Concerns about its security were raised, noting potential circumvention by replacing specified transaction inputs.

  • A more effective solution involving generic introspection opcodes is suggested, enhancing conditional logic and security.

OP_CHECKCO - NTRACTVERIFYand its amount semantic

10 replies

By AntoineP

Involving salvatoshi, Chris_Stewart_5+1 other

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Original post on March 17, 2025 12:29 UTC

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Last reply on April 19, 2025 15:56 UTC

delvingbitcoin

  • The email details a debate on blockchain validation rules, comparing two approaches.

  • It discusses concerns about parallelization and efficiency in validation processes.

  • The discussion includes references to specific implementations and commits demonstrating the approaches.

The Ark case for CTV

8 replies

By stevenroose

Involving instagibbs, harding+1 other

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Original post on March 17, 2025 17:23 UTC

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Last reply on April 14, 2025 12:24 UTC

delvingbitcoin

  • Two main issues are DoS attack risks and liquidity lockup affecting transactions.

  • Solutions include using blinded tokens for reliable users and verifying UTXO ownership.

  • CTV is a partial solution to DoS by penalizing non-compliant users in transaction rounds.

A simple backup scheme for wallet accounts

5 replies

By salvatoshi

Involving 1440000bytes, josh+1 other

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Original post on April 16, 2025 13:52 UTC

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Last reply on May 14, 2025 12:18 UTC

delvingbitcoin

  • A new encryption method for multisig wallets involves specific xpub knowledge for access.

  • It uses Shamir's Secret Sharing to split and encrypt the access secret, needing multiple xpubs.

  • The scheme also allows secure fund recovery by legitimate users without compromising security.

Cluster mempool partitioning attacks

5 replies

By stefanwouldgo

Involving sipa, instagibbs

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Original post on March 31, 2025 14:57 UTC

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Last reply on April 14, 2025 15:25 UTC

delvingbitcoin

  • Wallets and nodes bear dual responsibilities for individual and network-wide decisions in blockchain ecosystems.

  • These entities must manage transactions to support the network's overall health and efficiency, a complex task.

  • The discussion questions the realism of expecting decentralized entities to optimize for network-wide impacts.

Fee-Based Spam Prevention For Lightning

5 replies

By ClaraShk

Involving JohnLaw, harding

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Original post on March 14, 2025 23:58 UTC

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Last reply on May 12, 2025 17:47 UTC

delvingbitcoin

  • The inquiry examines a proposal to mitigate network jamming by locking equal collateral for channel capacity.

  • It questions the financial effects of locking funds and the opportunity cost it entails.

  • Concerns are raised about channel closure mechanics, suggesting a numerical example to understand the tradeoffs.

Bitcoin node P2P traffic analysis

5 replies

By gmaxwell

Involving andrewtoth, jsarenik+2 others

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Original post on March 3, 2025 14:06 UTC

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Last reply on April 18, 2025 05:57 UTC

delvingbitcoin

  • Privacy-enhancing technologies face skepticism due to their complexity and setup requirements.

  • Their impact on data monitors and sellers hinges on widespread adoption.

  • Incremental privacy improvements are valued despite not fully stopping network abuse.

How CSFS+PAIRCOMMIT enables mass delegated introspection

4 replies

By stevenroose

Involving josh, moonsettler+1 other

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Original post on April 14, 2025 20:59 UTC

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Last reply on April 15, 2025 17:14 UTC

delvingbitcoin

  • The discussion involves PAIRCOMMIT's role and `OP_CAT` in Bitcoin scripting.

  • Concerns about vulnerabilities like the 64-byte transaction issue are significant.

  • The debate questions if the benefits outweigh the risks of new opcodes.

Evolving the Ark protocol using CTV and CSFS

3 replies

By stevenroose

Involving instagibbs, roasbeef

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Original post on April 15, 2025 11:54 UTC

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Last reply on April 16, 2025 09:22 UTC

delvingbitcoin

  • The system uses CTV hashes to secure transactions and minimize user interaction, preventing replay attacks.

  • It employs timelocks and a perpetual refresh scheme to enhance security and manage refund transactions.

  • NO_INPUT/APO rebindable signatures, combined with CTV and CSFS, enable pre-signing of refund transactions.

The path to general computation on Bitcoin (with OP_CAT)

2 replies

By moonsettler

Involving Laz1m0v, victorkstarkware

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Original post on August 29, 2024 11:21 UTC

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Last reply on April 29, 2025 11:11 UTC

delvingbitcoin

  • The OP_CAT opcode enables potential for covenants and STARKs in Bitcoin's ecosystem.

  • STARKs rely on concatenation and hashing, aligning with Bitcoin's scripting and hashing capabilities.

  • Covenants could be implemented via the OP_CAT opcode, enhancing Bitcoin's functionality.

Spanning-forest cluster linearization

2 replies

By sipa

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Original post on February 5, 2025 01:08 UTC

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Last reply on May 12, 2025 21:42 UTC

delvingbitcoin

  • The SFL algorithm's effectiveness in optimizing linearization processes is compared to GGT and CSS.

  • Challenges include uncertainty in termination, complexity issues, and chunk splitting in the SFL algorithm.

  • Enhancements like LIMO and merging SFL states for improved outcomes are discussed but need more research.

SwiftSync -- Speeding up IBD with pre-generated hints (PoC)

1 reply

By sjors

Involving RubenSomsen

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Original post on April 9, 2025 10:30 UTC

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Last reply on May 3, 2025 14:06 UTC

delvingbitcoin

  • The email highlights optimization of Bitcoin's SwiftSync and `MuHash` functionalities.

  • SwiftSync is preferred for reducing assumptions, suggesting `-reindex` integration using undo data.

  • `MuHash` performance benefits from GitHub contributions and using libgmp could double its speed.

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