Bitcoin TLDR

#94

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Summary

Sep 8 - Sep 14, 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

The workshop on CHECKSIGFROMSTACK, led by Michael Zaikin, brought together Bitcoin developers to delve into the Bitcoin Improvement Proposal (BIP), exploring its applications and transaction creation techniques. The session emphasized community collaboration in advancing Bitcoin's development, with subsequent workshops planned to further investigate the creation and implications of different types of pools using CTV and CSFS technologies source.

In parallel, significant strides were made in Bitcoin Core's development, with the release candidate for version 30.0rc1 announced by fanquake, marking a critical step towards the new major version. This release candidate, available for testing, introduces various updates and improvements, encouraging community feedback to ensure its readiness for official release source. Keyser Söze proposed two Bitcoin Improvement Proposals aiming to enhance wallet interoperability and security through standardized encryption and serialization formats, underscoring an ongoing effort to achieve a more secure, standardized, and interoperable framework within the Bitcoin ecosystem source.

Meanwhile, ZmnSCPxj's discussion on the CAP Theorem's implications for Bitcoin and the Lightning Network highlighted the trade-offs between consistency, availability, and partition tolerance in distributed systems. The analysis illustrated how Bitcoin’s design prioritizes availability and partition tolerance, while the Lightning Network seeks to achieve consistency and partition tolerance, suggesting innovations like multi-signature schemes and Point Time-Locked Contracts (PTLCs) to balance these principles with the needs of financial transactions source.

Active Discussions

BIP Booby Trapped Wallets - Covenant-Only Taproot Outputs

1 reply

By Matias Monteagudo

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Original post on August 21, 2025 17:46 UTC

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Last reply on September 11, 2025 09:47 UTC

bitcoin-dev

  • A programmer is uncertain about their Bitcoin Improvement Proposal's presentation.

  • They followed the guide without receiving feedback, worrying about submission visibility or errors.

  • The situation calls for clearer guidelines and feedback mechanisms in Bitcoin development.

Sharing block templates

20 replies

By ajtowns

Involving gmaxwell, sipa+6 others

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Original post on August 5, 2025 19:08 UTC

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Last reply on September 12, 2025 13:22 UTC

delvingbitcoin

  • Efficient block relay depends on understanding peers' expected transaction success.

  • Orphan transactions are impractical for block relay due to validity and latency issues.

  • Limiting transaction pool size poses risks, including vulnerabilities to network attacks.

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

7 replies

By rustaceanrob

Involving RubenSomsen, gmaxwell+3 others

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Original post on April 9, 2025 10:30 UTC

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Last reply on September 8, 2025 15:09 UTC

delvingbitcoin

  • The SwiftSync project is a Rust-based binary improving blockchain sync efficiency via `libbitcoinkernel` modifications.

  • It initiates by reading a hintfile for pre-synchronization, connecting to peers, and managing blocks for IBD.

  • Promising test results invite further testing and feedback, with future updates aimed at faster sync speeds.

Addressing community concerns and objections regarding my recent proposal to relax Bitcoin Core's standardness limits on OP_RETURN outputs

7 replies

By AntoineP

Involving FernandoTheKoala, cguida+1 other

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Original post on May 14, 2025 19:34 UTC

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Last reply on September 16, 2025 13:28 UTC

delvingbitcoin

  • The discussion refutes the impact of data encoding on Bitcoin's legal status.

  • It mentions achieving large `OP_RETURN` outputs is possible without modifying Bitcoin Core's policy.

  • The critique suggests focusing on those amplifying concerns rather than on policy changes.

A Comprehensive OP_RETURN Limits Q&A Resource to Combat Misinformation

3 replies

By FernandoTheKoala

Involving garlonicon, tidwell

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Original post on May 12, 2025 17:31 UTC

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Last reply on September 9, 2025 07:51 UTC

delvingbitcoin

  • The byte limit for OP_RETURN outputs has increased to 100,000 bytes, sparking community debates.

  • This change addresses block space competition and reduces debates by eliminating financial incentives for oversized outputs.

  • Concerns arise over misuse for embedding illegal content, posing legal risks and challenging the balance between innovation and safety.

Open letter to core devs (reflectio - ns/questionsfrom the op_return saga and proposal to establish a well-organized channel/link between devs and users)

1 reply

By ArmchairCryptologist

Involving FernandoTheKoala

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Original post on September 14, 2025 13:19 UTC

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Last reply on September 14, 2025 18:41 UTC

delvingbitcoin

  • Bitcoin's recent updates address counterproductive limitations and encourage efficient data embedding.

  • Node and miner policy discrepancies hinder network efficiency, affecting block propagation.

  • Disparities in Bitcoin node types and their distribution raise questions about network decentralization.

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