Announcements

This is our last Meetup of the year!

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

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

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Mailing Lists, Meetings and Bitcoin Optech

Mailing Lists

bitcoin-dev

• op_ctv still has no technical objections
• Motion to Activate BIP 3
• A safe way to remove objectionable content from the blockchain
• OP_CIV - Post-Quantum Signature Aggregation
• SLH-DSA (SPHINCS) Performance Optimization Techniques
• Benchmarking Bitcoin Script Evaluation for the Varops Budget (GSR)
• Re: AI-assisted drafts and disclosure
• Announcing Penlock v1: Paper-Based Secret Splitting for BIP39 Seed Phrases
• (BIP Proposal) Standardization of On-Chain Identity Publication
• Improve Bitcoin’s resilience to large-scale power grid failures and Carrington-type solar storms
• New bitcoin backbone code release + Tx relay v2 update
• LNHANCE a soft-fork package
• (Pre-BIP Discussion) Bitcoin Node Repository Consensus-Policy Separation
• segOP potential BIP discussion
• (BIP Proposal) Soft Fork Compromise on op_return to Resolve Current Bitcoin Controversies
• By: Doctorbuzz1 {GitHub} Limit “Bulk Dust” with a default filter or consensus.
• (Concept) Anticipation Pool - Off-chain scaling using miner-validated transaction forwarding

Delving Bitcoin

• Consensus bug on NBitcoin: out-of-bound issue in Remove()
• Raw₿it — the visual raw transaction builder & script debugger
• Generalizing RBF under Cluster Mempool
• Delving Simplicity Part Ⅴ: Programs and Addresses
• Thoughts on a network policy for quantum-vulnerable UTXOs (long-exposure quantum attacks)
• Propagation Delay and Mining Centralization: Modeling Stale Rates
• Could Bitcoin Mining Survive a Carrington-Level Solar Storm?
• Gossip Observer: New project to monitor the Lightning P2P network
• Private Key Handover
• MergeSync: Parallel UTXO-set construction in assumevalid trust model
• Benchmarking Bitcoin Script Evaluation for the Varops Budget (Great Script Restoration)
• P2share: how to turn any network (or testnet!) into a bitcoin miner
• Delving Simplicity Part Ⅳ:Two Side Effects
• Comparing the performance of ECDSA signature validation in OpenSSL vs. libsecp256k1 over the last decade
• Miniscript Studio - a fulll IDE based on Rust Miniscript
• Bitcoin Embracing MimbleWimble

Meetings

• Bitcoin Core general developer meetings
  • October 30
  • November 6
  • November 13
  • November 20
  • November 27
• Lightning Specification meeting
  • November 17th
  • December 15th

Optech

• Bitcoin Optech Newsletter #382
• Bitcoin Optech Newsletter #381 - Recap Podcast
• Bitcoin Optech Newsletter #380 - Recap Podcast
• Bitcoin Optech Newsletter #379 - Recap Podcast
• Bitcoin Optech Newsletter #378 - Recap Podcast

Network Data

• Bitcoin Network Operations Collective

CVEs and Research

Research

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InfoSec

• See the business data leaking onto the dark web with Proton’s Data Breach Observatory
• Keeping the Internet fast and secure: introducing Merkle Tree Certificates

Pull Requests and repo updates

Bitcoin Core

• cmake: Set WITH_ZMQ to ON in Windows presets
• contrib: turn off compression of macOS SDK to fix determinism (across distros)
• interfaces: remove redundant mempool lock in ChainImpl::isInMempool()
• test: Fix reorg patterns in tests to use proper fork-based approach
• doc: clarify and cleanup macOS fuzzing notes
• kernel: add btck_block_tree_entry_equals
• test: add -alertnotify test for large work invalid chain warning
• Cluster mempool
• init: Require explicit -asmap filename
• doc: update multisig tutorial to use multipath descriptors
• ci: Enable experimental kernel stuff in most CI tasks via dev-mode
• rpc: Handle -named argument parsing where ‘=’ character is used
• test: Fix race condition in IPC interface block progation test
• kernel: handle null or empty directories in implementation
• test, refactor: Embedded ASMap (1/3): Selected minor preparatory work
• miniscript: account for all StringType variants in Miniscriptdescriptor::ToString()
• init: completely remove -maxorphantx option
• psbt: clarify PSBT, PSBTInput, PSBTOutput unserialization flows
• doc: Update NetBSD Build Guide
• init: Fix Ctrl-C shutdown hangs during wait calls
• mining: check witness commitment in submitBlock
• doc: document fingerprinting risk when operating node on multiple networks
• kernel: Allow null arguments for serialized data
• Update minisketch subtree
• rpc: add “ischange: true” to decoded tx outputs in wallet gettransaction response
• kernel: Introduce C header API
• random: scope environ extern to macOS, BSDs and Illumos
• test: cover invalid codesep positions for signature in taproot
• (IBD) coins: increase default UTXO flush batch size to 32 MiB
• test: Use same rpc timeout for authproxy and cli
• test: add valid tx test with minimum-sized ECDSA signature (8 bytes DER-encoded)
• Modernize use of UTF-8 in Windows code
• test: add functional test for TestShell (matching doc example)
• wallet: allow label for non-ranged external descriptor (if internal=false) & disallow label for ranged descriptors
• Fix tiebreak when loading blocks from disk (and add tests for comparing chain ties)

BDK

• Correct rpc example command syntax

rust-bitcoin

• Use usize for CompactSizeEncoder::new
• Add decode test for reserve capacity
• io: Add decoding functions
• Improve the SerializedSignature types
• Allow underscores as separators in Amount values
• primitives: handle decoding zero-input transactions
• Create an empty crypto crate
• Add new error type for PushBytes::read_scriptint
• primitives: Implement BlockDecoder for Block
• consensus_encoding: implement batched allocation for vector decoders
• primitives: single allocation witness decoder
• consensus_encoding: Introduce API text files
• Add as_str method to Opcode
• Mutation test consensus_encoding
• Add unwrapping function to XOnlyPublicKey
• Remove unstable hex dep from public API of primitives
• primitives: Introduce API text files
• chore(script): implement is_p2a for ScriptPubKeyExt

libsecp

• refactor: split up internal pubkey serialization function into compressed/uncompressed variants
• ecmult_multi: reduce strauss memory usage by 30%

Core Lightning

• xpay: fix misleading “route hint” label in error messages
• Fix the long-elusive “sometimes we miss utxo spends” bug.
• Downgrade tool
• hsmd: fix HSM sent an unknown message type error
• Fix BOLT11 annotation loss after sendonion failure
• msggen: fix primitive serialization for special names
• Big nodes, big loads and lots of (overdue) optimizations
• lightningd: fix race with mutual connect.
• Funding transaction withholding support
• Fixing onion message support requirement for the first_node_id of bolt12 invoices
• lightningd: notify plugins when finalizing channel
• xpay phoenix detect
• xpay reserve clash
• Listpays still pending db fix
• splice: Update splice_info tlv to use odd version
• xpay: wait, if final node gives us an indication we’re behind on blockheight.
• Xpay bad nodes
• Add Experimental no-MPP, Lsp-Trusts-Client LSPS2 Support
• keysend: enforce BOLT11 description length limit
• listnetworkevents: keep a log of all connect/disconnect/failed-connect and pings
• lightningd: add peer_id to htlc_accepted_hook
• Add the ability to override an invoice amount to the htlc_accepted hook
• Deprecate bech32 as default for newaddr
• Fix listpays still pending when using xpay/injectpaymentonion
• Giant tx fix
• Fix bookkeeper parallel crash
• Fix askrene infinite loop
• Fix bookkeeper blockheight read on restart
• Remove libsodium and lowdown submodules to fix recursive clone

eclair

• Monitor the internal state of ReputationRecorder
• Update default configuration for revoked HTLC clean-up
• Allow high remote dust_limit_satoshis
• Use 73 bytes der-encoded signatures in weight estimation
• Allow aborting liquidity purchases after signing
• Check that relay fees are nonnegative
• Add CommitSigBatch codec
• Enable detailed monitoring for singleton actors
• Stop sending update_fee for mobile wallets
• Remove support for non-anchor channels
• Require closed channels migration before starting
• Fix reconnection to clearnet addresses via Tor

LDK

• Enforce Trampoline Constraints (replacement)
• Add millisatoshi truncation 0FC test vectors from the spec
• Add funding redeem script to ChannelDetails and ChannelPending event
• Support async fetching of commitment point during channel reestablish
• Add support for Testnet4
• Add duplicate dust test vector for zero fee channels
• Zero fee commitment test vectors
• Log structured peer, channel and hash fields
• Introduce ReceiveAuthKey verification for Blinded Payment Paths
• Always forward gossip for all our channels to all our peers
• Properly consider blinded paths in InFlightHtlcs
• Use 72 WU instead of 73 WU for signature weight
• Allow counterparty tx_abort before handling initial commitment signed
• Add LDK Node integration test
• Don’t prune pending_requests in persist
• notify ChainMonitor’s EventNotifier on async write completion
• Include monitor name in error when failing to load a monitor
• symlink the root README in crates so that crates.io shows it
• Small API tweaks to make bindings easier
• Add fmt::Debug implementation for FundedChannel
• Note the mempool policy requirements of zero-fee commitment channels
• Remove Send + Sync bounds when no-std
• Put a 10_000vByte cap on HolderHTLCOutput 0FC package templates
• Track funding tx channelmonitor
• Fix race in PeerManager read pausing.
• Assure BroadcasterInterface packages of len > 1 are child-with-parents
• Fix SCID removal when an HTLC is pending from 0.1 before upgrading
• Fix panic when deserializing Duration

lnd

• server: prevent duplicate onion addresses in getinfo
• lnwallet: add field CommitTxBlockHeight to ResolutionReq
• fix scanning issue
• graph: fix graph-cache issue
• Fix unit test for onion messages
• multi: update mapstructure/v2
• multi: add upfront-shutdown-address to lnd.conf.
• chainrpc: return Unavailable while notifier starts
• discovery: fix potential infinite loop bug re context cancel error handling in gossip syncer
• Don’t fail on invalid extra tlv data when decoding a payment

BIPs

• BIP54: Consensus Cleanup test vectors
• BIP-116: add link to bip-8 and fix collision
• bip54: clarify sigops counting, borrow bip16 language
• BIP 3: mention posting a dedicated ML thread
• BIP3: clarify number assignment

BOLTs

• bolt11: clarify signature normalization requirements
• Attribution data (feature 36/37)

New Releases

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Events and Podcasts

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Mining

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Miscellaneous

• How Bitkey used Chain Code Delegation to create the first private collaborative bitcoin wallet.
• Quantum Doomsday Clock
• Ordiknots: magic transactions with arbitrary data, powered by Bitcoin Knots
• Email your representative to eliminate capital gains on bitcoin payments under $600
• An Independent Security Audit of Bitcoin Core
• Cloudflare outage on November 18, 2025
• Trump Crypto Venture WLFl Sold Tokens To Entities Tied to North Korea, Iran & a Notorious Money Laundering Platform
• Who is Owen Gunden? Bitcoin wizard sells off all his coins worth $1.3bn
• Shai Hulud Launches Second Supply-Chain Attack: Zapier, ENS, AsyncAPI, PostHog, Postman Compromised
• Not in The Prophecies: Practical Attacks on Nostr