Bitcoin TLDR

#61

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Summary

Dec 30 - Jan 4, 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

Significant enhancements were made to the Bitcoin covenants support wiki in late November 2024, informed by developer feedback which introduced a new category LNHANCE and improved the resource's accuracy with revisions such as terminology adjustments, the addition of Bitcoin Improvement Proposal (BIP) drafts, and a rationale column. Feedback from Murch and Gloria, highlighted in the bitcoin optech podcast episode 333, contributed to the development of a dedicated page listing use cases and prototype links, emphasizing the exclusion of cases enabled solely by OP_CHECKSIGFROMSTACK. Moderation efforts to ensure the integrity of information were bolstered by granting Rearden moderator permissions, amidst discussions highlighting limited interest in SIGHASH_APO among developers and unanimous support for OP_CHECKSIGFROMSTACK, indicating areas for further exploration and the need for achieving technical consensus on covenant proposals (source).

A revealed bug in Bitcoin Core's block-building algorithm was identified by Ismael Sadeeq, causing underutilization of block weight and sparking a proposed Pull Request (PR) to correct the generation of block templates. Analysis covering over 107,313 blocks from December 2022 to December 2024, demonstrated most mining pools adhere to default settings, with exceptions like Ocean.xyz and F2Pool, which either exceeded the limit or optimized usage, indicating a need for correction to align actual block weights with theoretical expectations and improve mining efficiency (source).

John Law's implementation of relative timelocks in payment channels enhances operational security by using dual "lanes" for managing timeouts and employing TXID stability, showcasing an innovative approach to transaction management within payment networks. This system's design underscores the potential of leveraging txid stability for improving the functionality and reliability of payment channels (source).

The Delving website's user engagement showed a significant upward trend from January 2023 to December 2024, with a notable increase post-August 2023, even after implementing an upgrade to filter out non-genuine traffic, suggesting content generation might influence visitation patterns. This growth underscores the dynamic nature of online platform engagement and the impact of content on attracting or retaining site visitors (source).

Active Discussions

Trivial QC signatures with clean upgrade path11 replies

By David A. Harding

Involving

Matt Corallo, Anthony Towns+6 others

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Original post on December 15, 2024 21:42 UTC

cyclic icon

Last reply on January 2, 2025 00:43 UTC

bitcoin-dev

  • Matt Corallo suggests QC-secure commitments to protect wallets from quantum threats.
  • Blockchain fork necessity and post-quantum scenario delays present significant challenges.
  • Guy Fawkes signatures offer a preemptive solution without immediate consensus changes.
TRUC and P2A for CTV fee management2 replies

By stutxo

Involving

/dev /fd0

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Original post on December 18, 2024 00:25 UTC

cyclic icon

Last reply on December 31, 2024 00:57 UTC

bitcoin-dev

  • A Bitcoin Development update introduced a 1c1p spend example without p2a.
  • Links to both parent and child transactions demonstrate no-fee inclusion in the mempool.
  • Version 3 transactions and pay-to-address were added to a CTV payment pool PoC.
Timewarp attack 600 second grace period19 replies

By sjors

Involving

AntoineP, zawy+2 others

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Original post on December 17, 2024 07:53 UTC

cyclic icon

Last reply on January 31, 2025 11:12 UTC

delvingbitcoin

  • The discussion highlights miners' strategic behaviors in the Bitcoin network, including block rate manipulation.
  • Technical vulnerabilities in mining software can lead to invalid blocks, impacting network stability.
  • Proposed timewarp rules and bug fixes aim to prevent exploitation and ensure compliance with time settings.
CTV, APO, CAT activity on signet19 replies

By 1440000bytes

Involving

ajtowns, fiatjaf+3 others

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Original post on November 14, 2024 17:34 UTC

cyclic icon

Last reply on January 3, 2025 08:27 UTC

delvingbitcoin

  • Statistics aid developers testing soft forks, influencing OP_CAT supporters for mainnet activation.
  • The utility of statistics for soft fork testing creates a divide within the Bitcoin community.
  • Signet bot data leverages arguments for mainnet actions, central to blockchain debate dynamics.
Fastest-possible PoW via Simple DAG16 replies

By zawy

Involving

mcelrath, ajtowns+5 others

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Original post on December 22, 2024 15:14 UTC

cyclic icon

Last reply on February 9, 2025 16:48 UTC

delvingbitcoin

  • The study evaluates algorithms' adaptability to hashrate and latency changes in network simulations.
  • SMA algorithm excels in adjusting to hashrate variations but struggles with latency responsiveness.
  • Bob’s "parent method" offers quicker adjustments, targeting a unique ratio for stability and responsiveness.
Transitory Soft Forks for Consensus Cleanup Forks11 replies

By harding

Involving

1440000bytes, JeremyRubin+2 others

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Original post on December 23, 2024 22:53 UTC

cyclic icon

Last reply on January 4, 2025 15:51 UTC

delvingbitcoin

  • The discourse analyzes transitory soft forks in Bitcoin, differentiating cleanup vs. new features.
  • It suggests cautious application of potentially confiscatory rules to mitigate risks, enhancing safety.
  • The text debates using soft forks for features or cleanup, urging a consistent approach for consensus.
CTV++ OP_TEMPLATEHASH and OP_INPUTAMOUNTS10 replies

By harding

Involving

moonsettler, 1440000bytes+3 others

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Original post on December 30, 2024 12:34 UTC

cyclic icon

Last reply on January 3, 2025 21:44 UTC

delvingbitcoin

  • The operation sums identical script inputs when `n` equals 0, aiding in transaction analysis.
  • If `n` is less than 0, it sums the last `n` inputs, offering a rolling window view.
  • Questions arise about handling inputs over 31 bits, crucial for large transactions.
Deterministic tx selection for censorship resistance6 replies

By ajtowns

Involving

mcelrath, David Harding+2 others

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Original post on April 29, 2024 12:26 UTC

cyclic icon

Last reply on January 7, 2025 13:40 UTC

delvingbitcoin

  • The email details complexities in cryptocurrency mining pools' transaction selection and block space allocation.
  • It proposes allocating 95% of block space deterministically and 5% at miners' discretion.
  • A technical solution using `sha256(sharehash)` aims to efficiently manage transaction data distribution.
Proposing a P2QRH BIP towards a quantum resistant soft fork3 replies

By cryptoquick

Involving

conduition

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Original post on June 8, 2024 21:11 UTC

cyclic icon

Last reply on February 21, 2025 20:04 UTC

delvingbitcoin

  • The email discusses cautious integration of new algorithms in high assurance products.
  • It explores updating BIP-360 with WOTS and includes considering hybrid cryptography with DASK.
  • Technical questions on signature validation and praises for research quality are mentioned.
op_CAT vs op_CTV vs XMR2 replies

By moonsettler

Involving

HubertusVIE, securitybrahh

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Original post on December 3, 2024 10:46 UTC

cyclic icon

Last reply on December 30, 2024 15:15 UTC

delvingbitcoin

  • The discourse addresses the vulnerability of cryptocurrency technologies to quantum computing.
  • Monero is actively enhancing its security against quantum threats, with updates due in three years.
  • There's concern over the Bitcoin community's slow post-quantum security development and migration plan.
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