Announcements

Please join us for our next Socratic Seminar. A special thank you to our sponsors CardCoins, Chaincode Labs and Wolf NYC for food, refreshments and event space.

If you can’t make it to the main event please join us at PUBKEY around 9:30PM.

Presentation

• Dan Gould: Payjoin v2: Oblivious, Serverless, Asynchronous Batching

Mailing Lists, Meetings and Bitcoin Optech

Mailing Lists

bitcoin-dev

• MATT demo: Optimistic execution of arbitrary programs
• Draft BIP: OP_TXHASH and OP_CHECKTXHASHVERIFY
• BitVM: Compute Anything on Bitcoin
  • tapleaf-circuits, example transaction, functional encryption improvement, build nand gate
• Proposed BIP for MuSig2 PSBT Fields
• Proposed BIP for MuSig2 Descriptors
• Refreshed BIP324
• Goldfish: Spoofing wallet fingerprints to improve privacy
• Full Disclosure: CVE-2023-40231 / CVE-2023-40232 / CVE-2023-40233 / CVE-2023-40234 “All your mempool are belong to us”
  • visual explainer
• Batch exchange withdrawal to lightning requires covenants
• Taproot Assets on Mainnet: Announcing tapd v0.3.0-alpha
• Bitcoin Core 25.1 released
• Announcing My PhD Thesis: “Evolving Bitcoin Custody”
• Examining ScriptPubkeys in Bitcoin Script
• Breaking change in calculation of hash_serialized_2
• Proposed BIP for OP_CAT
• Ordinals BIP PR
• On solving pinning, replacement cycling and mempool issues for bitcoin second-layers

lightning-dev

• SimLN: Simulate active test networks
• Full Disclosure: CVE-2023-40231 / CVE-2023-40232 / CVE-2023-40233 / CVE-2023-40234 “All your mempool are belong to us”
• Batch exchange withdrawal to lightning requires covenants
• Removing channel reserve for mobile wallet users
• On solving pinning, replacement cycling and mempool issues for bitcoin second-layers

Meetings

• Bitcoin PR Review Club
  • #28107 Type-safe transaction identifiers
  • #28368 Fee Estimator updates from Validation Interface/CScheduler thread
• Bitcoin Core general developer meetings
  • September 28
  • October 5
  • October 12
  • October 17
  • October 19
• Lightning Specification meeting
  • October 23rd

Optech

• Bitcoin Optech Newsletter #270 Recap Podcast
• Bitcoin Optech Newsletter #271 Recap Podcast
• Bitcoin Optech Newsletter #272 Recap Podcast
• Bitcoin Optech Newsletter #273 Recap Podcast
• Bitcoin Optech Newsletter #274

Network Data

• BitMEX consolidates 100k UTXOs
• ClarkMoody adds inscription data
• Frontrunning brc-20 inscriptions with malicious mints
• Hunting the Real Bitcoin Network Hashrate
• Invalid MARAPool block 809478
• LightningTipBot loses 30% of its channels in force-close incident
• OKX consolidating legacy 2 of 3 multisig outputs, more
• River has routed 3 million lightning payments
• The Lightning Network Grew by 1212% in 2 Years

CVEs and Research

Research

• Evicting and filling attack for linking multiple network addresses of Bitcoin nodes
• Naysayer proofs, discussion
• One-time and Revocable Ring Signature with Logarithmic Size in Blockchain
• The Centralizing Effects of Private Order Flow on Proposer-Builder Separation

InfoSec

• Don’t overextend your Oblivious Transfer
• “EtherHiding” — Hiding Web2 Malicious Code in Web3 Smart Contracts
• HTX suffers a $8M hack
• Security researcher stopped at US border for investigating crypto scam

Pull Requests and repo updates

Bitcoin Core

• wallet: Reload watchonly and solvables wallets after migration
• Make miniscript GetWitnessSize accurate for tapscript
• assumeutxo: fail early if snapshot block hash doesn’t match AssumeUTXO parameters
• lib: add taproot support to libconsensus
• Implement CCoinsViewErrorCatcher::HaveCoin and check disk space periodically
• rpc: add hidden getrawaddrman RPC to list addrman table entries
• descriptors: Disallow hybrid and uncompressed keys when inferring
• AssumeUTXO follow-ups
• rpc: allow submitpackage to be called outside of regtest
• BIP324 integration
• assumeutxo (2)
• MiniTapscript: port Miniscript to Tapscript
• descriptors: disallow hybrid public keys
• Add headerssync tuning parameters optimization script to repo
• net: raise V1_PREFIX_LEN from 12 to 16
• http: bugfix: allow server shutdown in case of remote client disconnection
• net: Drop v2 garbage authentication packet
• Add package evaluation fuzzer

BDK

• Add bitcoind_rpc chain source module.

rust-bitcoin

• Upgrade secp dependency
• Update bech32 dependency
• Audit error types code base wide
• Feature: Psbt fee checks
• Re-write the weight/size API
• Add Witness::p2wpkh constructor

Core Lightning

• Restore any missing psbt metadata that resource constrained signers strip
• Simplify use of channel_update
• Plugin and broadcast cleanups
• Allow even unknown messages, by registration, and allow sending them
• addpsbtoutput: New onchain command for PSBT output and splice_out tests
• runes: Reimplement rate in terms of per

eclair

• Ignore disabled edges for routing messages
• Adapt max HTLC amount to balance
• Simplify dual-funded min-depth calculation
• Strip witness of interactive tx parents
• Add metrics on splicing
• Handle splice with local/remote index mismatch
• Poll bitcoind at startup instead of trying only once
• Remove ChannelFeatures->ChannelType conversion
• Assume widely supported features
• Splice with pending committed htlcs
• Improve startup resource usage
• Allow splicing on non dual-funded channels
• Fix tests that expect network minimum feerate to be less than other rates

LDK

• BOLT 12 Offers message flow
• Monitor updating persister
• BOLT 12 Offers utilities
• Set a default max_total_routing_fee_msat of 1% + 50sats
• Try to overpay the recipient if we fail to find a path at all and limit overpay #2604
• Use correct to_remote script in counterparty commitments
• Allow retrieval of SpendableOutputDescriptors from relevant transactions
• More flexible fee rate estimates

lnd

• multi: pong enforcement
• invoices: refactor InvoiceDB to eliminate ScanInvoices
• Add more information when a co-op close is failing.
• input+sweep: make sure input with no fee rate is not added to cluster
• sweeper: relax anchor sweeping when there’s no deadline pressure
• tlv: fuzz test encoding/decoding
• funding: wait for coinbase maturity before sending channel_ready
• lnwallet+rpcserver: fix weight calculation for taproot channels
• peer: launch persistent peer pruning in background goroutine
• chanacceptor+lnrpc: add simple taproot channel support

New Releases

• BDK 0.29.0
• Bitcoin Core 25.1
• LDK 0.0.117
• LND v0.17.0-beta

Miscellaneous

• Announcing the $12k NIST Elliptic Curves Seeds Bounty
• Bitcoin Knowledge and Perceptions: Chapter II
• Covenants: Dealing with Amounts in Bitcoin Script
• Covenants: Examining ScriptPubkeys in Bitcoin Script
• Covenants tools softfork
• Current state of validity rollups on Bitcoin
• Doppler – A Lightning Domain-Specific Language
• Drivechains: A Detailed Analysis, rebuttal
  • Drivechains: From a Bitcoin Miners’ Perspective
  • Merged Mining and Decentralization
• FinCEN Seeks to Impose Strict Surveillance Requirements onto Broadly Defined Class of ‘Bitcoin Mixers’
• Hal Finney Was Not Satoshi Nakamoto
• HRF gifts ~19BTC via its Bitcoin Development Fund
• OpenSats Announces Long-Term Support for Gleb Naumenko
• OpenSats Announcest Long-Term Support for Matt Morehouse
• OpenSats Announces Third Wave of Nostr Grants
• Our Data Driven Approach to Fixing Payment Reliability
• OP_CHECKSEPARATESIG And Actuaries: Fixing Multiparty Channel Factories
• Runes
• Taproot Assets on Mainnet: A New Era for Bitcoin and Beyond
• Warnet - Monitor and analyze the emergent behaviors of P2P networks