Bitcoin TLDR

#113

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Summary

Jan 19 - Jan 25, 2026

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

Recent discussions across various platforms have shed light on evolving strategies and innovations in the Bitcoin ecosystem, addressing both immediate technical challenges and long-term philosophical considerations. The exploration of "garbled circuits" and their application in mitigating channel jamming within the Lightning Network underscores a growing interest in cryptographic solutions that enhance network functionality and fairness. This research, accompanied by significant contributions from Gleb Naumenko et al., suggests that native contract-based approaches could serve as effective alternatives to traditional strategies for resolving such issues, without altering underlying consensus mechanisms (Delving into Bitcoin).

In another sphere, the integration of the Falcon post-quantum signature scheme into Bitcoin Core as a soft fork reflects a proactive stance against the emerging threat posed by quantum computing. This initiative not only highlights the efficiency and potential of Falcon in maintaining Bitcoin's security against quantum attacks but also serves as a practical reference for the future adoption of post-quantum cryptographic algorithms, emphasizing the need for a balance between security and operational efficiency within the network (GitHub repository).

Moreover, the concept of Bitcoin's protocol evolving into a "Digital Latin" encapsulates a vision for the currency's foundation to become immutable and resistant to semantic drift. This philosophical approach, advocating for an asymptotic ossification of the protocol, aims to ensure that Bitcoin remains a stable and reliable base layer upon which innovation can flourish in higher layers without compromising the core principles of trustlessness and immutability. This strategy underscores the importance of a deliberate and cautious approach to protocol evolution, highlighting the necessity of distinguishing changes driven by survival from those motivated by political or preferential reasons, thereby preserving Bitcoin's integrity as a foundational digital asset for future generations (Digital Latin).

Collectively, these discussions reflect a multifaceted approach to addressing both the technical and philosophical challenges facing the Bitcoin ecosystem. From enhancing the security and functionality of the Lightning Network to preparing for the advent of quantum computing and ensuring the long-term stability of Bitcoin's protocol, the community continues to explore innovative solutions that balance immediate needs with future-proofing the network.

Active Discussions

Re: The Cat, BIP draft discussion.

19 replies

By Pepe Hodler

Involving Greg Maxwell, Jonathan Voss+11 others

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Original post on December 11, 2025 20:54 UTC

cyclic icon

Last reply on January 22, 2026 01:14 UTC

bitcoin-dev

  • Discussions focus on Bitcoin spam and addressing UTXO bloat without undermining core principles.

  • Matteo Pellegrini's proposal aims to make small UTXOs unspendable to prevent network spam.

  • Concerns include potential censorship and the impact on the Lightning Network's security.

Hash-Based Signatures for Bitcoin's Post-Quantum Future

16 replies

By conduition

Involving Mikhail Kudinov, Jonas Nick+5 others

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Original post on December 8, 2025 20:28 UTC

cyclic icon

Last reply on December 24, 2025 15:02 UTC

bitcoin-dev

  • Conduition supports Jonas's SHRINCS idea, suggesting a modular design for better standardization.

  • They see stateful HBS as essential until stateless solutions like SQIsign evolve.

  • The email links to an extensive commentary on Bitcoin development discussions regarding SHRINCS.

QRAMP addition: Alternative to legacy freeze: “quarantine-mode” legacy spends via two-phase destination commitment

3 replies

By bnv

Involving Giulio Golinelli

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Original post on January 13, 2026 02:15 UTC

cyclic icon

Last reply on January 18, 2026 13:44 UTC

bitcoin-dev

  • A proposal suggests moving coins to a new address post-transaction to thwart quantum threats.

  • The author criticizes the QRAMP proposal for advocating the freezing of coins in old addresses.

  • They advocate for flexible coin transfers to enhance security and user control, ensuring adaptability.

Re: Unbreaking testnet4

2 replies

By Saint Wenhao

Involving Angelo

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Original post on January 18, 2026 17:26 UTC

cyclic icon

Last reply on January 19, 2026 08:40 UTC

bitcoin-dev

  • Testnet4 has produced 30,000 more blocks than expected, raising adjustment concerns.

  • Proposing to reject blocks with CPU difficulty threatens network stability and usability.

  • Extending the adjustment period could mitigate surplus issues without severe impacts.

LN-Symmetry Project Recap

16 replies

By instagibbs

Involving ajtowns, rustyrussell+2 others

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Original post on January 5, 2024 18:03 UTC

cyclic icon

Last reply on January 22, 2026 19:09 UTC

delvingbitcoin

  • The updated branch significantly improves functionality, adopting new technologies like automated anchor bumping.

  • Demonstrations of transaction updates and closures on mempool.space/signet illustrate real-world applicability.

  • Strategic migration to OP_TEMPLATEHASH and related tech aims to enhance functionality, inviting community experimentation.

OP_CC: A simple introspection opcode to enable cheaper consolidations

14 replies

By conduition

Involving billymcbip, reardencode+5 others

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Original post on December 30, 2025 12:53 UTC

cyclic icon

Last reply on January 19, 2026 16:06 UTC

delvingbitcoin

  • The approach offers a cost-effective solution for post-quantum signature aggregation.

  • It mandates a public commitment to a single address for spending, raising privacy concerns.

  • Despite its limitations, it suggests a balance between functionality and privacy in cryptography.

SHRINCS: 324-byte stateful post-quantum signatures with static backups

12 replies

By conduition

Involving jonasnick, moonsettler

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Original post on December 11, 2025 08:40 UTC

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Last reply on January 27, 2026 06:38 UTC

delvingbitcoin

  • SHRINCS introduces a balance between stateful and stateless signing, penalizing address reuse.

  • Vulnerabilities include fault injection attacks that could enable message forgery.

  • A dual-scheme approach in tapscript offers modularity, easing Bitcoin Improvement Proposals integration.

BMAX: pricing “sats now vs sats later” via a mining sharechain (no L1 changes, no custodians, no oracles)

8 replies

By coinjoinkillua

Involving VzxPLnHqr, ajtowns+1 other

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Original post on December 16, 2025 19:00 UTC

cyclic icon

Last reply on January 20, 2026 17:57 UTC

delvingbitcoin

  • The correspondence criticizes the shift in token issuance from Bitcoin to sharechain difficulty.

  • It advocates for a share burning mechanism to control inflation and enhance scalability.

  • Suggesting improvements, the author proposes reintroducing a FIFO queue for fair miner rewards.

Scheduled (Delayed) Transaction Broadcast

6 replies

By arminsdev

Involving optout, ArmchairCryptologist+2 others

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Original post on December 8, 2025 14:46 UTC

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Last reply on January 28, 2026 19:32 UTC

delvingbitcoin

  • Delaying P2P transaction broadcasts enhances privacy by hindering adversary analysis.

  • Despite mitigation, this strategy doesn't fully prevent pattern detection by malicious observers.

  • It should complement broader privacy measures, acknowledging its limitations in isolation.

Hornet UTXO(1): A custom, constant-time, highly parallel UTXO database

6 replies

By tobysharp

Involving jsarenik, optout+1 other

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Original post on January 11, 2026 21:25 UTC

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Last reply on January 28, 2026 18:08 UTC

delvingbitcoin

  • The email discusses developing new blockchain technology, focusing on the Hornet UTXO database.

  • It compares the performance of Bitcoin Core and Hornet Node, highlighting potential efficiency gains.

  • The project aims for broader functionalities and an open, collaborative development approach.

Silent Payments notifications via Nostr

3 replies

By RubenSomsen

Involving setavenger

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Original post on January 15, 2026 23:09 UTC

cyclic icon

Last reply on January 21, 2026 10:41 UTC

delvingbitcoin

  • The email discusses blockchain transaction identification, highlighting txids and taproot outputs.

  • It explores trust models and verifying transactions without needing input scripts if the sender is trusted.

  • Concerns are raised about the Web of Trust and the timing of transaction notifications for protocol design.

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