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Mailing Lists, Meetings and Bitcoin Optech

Mailing Lists

bitcoin-dev

• BIP39 Extension for Manual Seed Phrase Creation
• Proposal to solve the spam war: configurable data blob relay policy
• jpeg resistance of various post-quantum signature schemes
• Public disclosure of one vulnerability affecting Bitcoin Core <29.0
• (Proposal) 64-bit arithmetic in Script
• The Tragic Tale of BIP30
• Re: (bitcoin-dev) [Opt-in full-RBF] Zero-conf apps in immediate danger
• Graftleaf: Program Composition and Generic Delegation
• ColliderVM protocol for computation and L2 bridges
• Introducing Hourglass
• BIP Proposal: Define Bitcoin Subunits as Satoshis/Sats
• Removing checkpoints in Bitcoin Core v30
• (meta) moving conceptual discussion for policy changes
• The Future of Bitcoin Testnet
• Standard Unstructured Annex

Delving Bitcoin

• Latency and Privacy in Lightning
• vExtraTxnForCompact Considered Useful
• Dust Expiry: Clean the UTXO set from spam
• On the possibility of evil covenants and implications for soft fork proposals
• Addressing community concerns and objections regarding my recent proposal to relax Bitcoin Core’s standardness limits on OP_RETURN outputs
• Bitcointap: an strace-like tool for bitcoin ebpf USDT tracepoints
• The Spam problem of Bitcoin and Unpermissioned Broadcast Networks in general
• A Comprehensive OP_RETURN Limits Q&A Resource to Combat Misinformation
• Path Queries: Addressing Payment Reliability and Routing limitations
• Withdrawing OP_VAULT (BIP-345)
• Graftleaf: Program Composition and Generic Delegation
• ColliderVM protocol for computation and L2 bridges
• A simple approach to allowing recursive covenants by enabling quines
• Behind the OP_RETURN Drama
• OP_RETURN limits: Pros and Cons
• Avoiding xpub+derivation reuse across wallets, in a UX-friendly manner

Meetings

• Bitcoin PR Review Club

  • #31981 Add checkBlock() to Mining interface
  • #31444 Cluster mempool: add txgraph diagrams/mining/eviction
  • #32317 Separate UTXO set access from validation functions
  • #31375 Add bitcoin wrapper executable

• Bitcoin Core general developer meetings

  • April 24
  • April 1
  • May 8
  • May 15
  • May 22

• Lightning Specification meeting

  • April 21
  • May 5
  • May 19

Optech

• Bitcoin Optech Newsletter #351
  • Recap Podcast
• Bitcoin Optech Newsletter #352
  • Recap Podcast
• Bitcoin Optech Newsletter #353
  • Recap Podcast
• Bitcoin Optech Newsletter #354
  • Recap Podcast
• Bitcoin Optech Newsletter #355

Network Data

• 2024 OP_RETURN data pie chart
• 42 Bitcoin in OP_RETURN outputs
• First use of taproot annex, second
• Has f2pool dropped their min relay fee?
• LNBig routing fee stats
• MARA mines block with odd 980kb tx with op_returns
• Non-Standard Bitcoin Transaction Dataset
• Odd behavior during antpool f2pool block race
• UTXO Set Report
• Wallet of Satoshi has significant adoption in Japanese lighting wallet market

CVEs and Research

Research

• A Novel Off-Chain Transaction Framework for Channel Cooperation
• Ark: A UTXO-based Transaction Batching Protocol
• Bitcoin and Quantum Computing: Current Status and Future Directions
• Clementine: A Collateral-Efficient, Trust-Minimized, and Scalable Bitcoin Bridge
• Enforcing arbitrary constraints on Bitcoin transactions
• KeyJoin: Privacy-Focused CoinJoin Protocol for Bitcoin
• Model Checking the Security of the Lightning Network
• Moneros Decentralized P2P Exchanges: Functionality, Adoption, and Privacy Risks
• MProve-Nova: A Privacy-Preserving Proof of Reserves Protocol for Monero
• On the Adaptive Security of Key-Unique Threshold Signatures
• Starfish: Rebalancing Multi-Party Off-Chain Payment Channels
• TOOP: A transfer of ownership protocol over Bitcoin

InfoSec

• Bitcoin Core CVE-2024-52919 - Remote crash due to addr message spam (part 2)
• Coinbase Data Breach effects 70,000 customers
• DDoS attack targeting Monero nodes
• NBitcoin fails to process coinbase transaction
• rust-mininscript CVE-2025-43707: out-of-bounds read
• Supply chain attack hits npm package rand-user-agent

Pull Requests and repo updates

Bitcoin Core

• wallet, rpc, doc: various legacy wallet removal cleanups in RPCs
• checkqueue: make the queue non-optional for CCheckQueueControl and drop legacy locking macro usage
• random: Use modern Windows randomness functions
• qt: drop unused watch-only functionality
• psbt: add non-default sighash types to PSBTs and unify sighash type match checking
• Wallet: Fix Non-Ranged Descriptors with Range (0,0) Trigger Unexpected Wallet Errors in AddWalletDescriptor
• Reintroduce external signer support for Windows
• wallet: Ensure best block matches wallet scan state
• rpc: Undeprecate rpcuser/rpcpassword, store all credentials hashed in memory
• Update leveldb subtree to latest upstream
• Update minisketch subtree
• init: drop -upnp
• qt, wallet: Convert uint256 to Txid
• miner: timelock the coinbase to the mined block’s height
• test: add test for decoding PSBT with MuSig2 PSBT key types (BIP 373)
• fees: document non-monotonic estimation edge case
• cluster mempool: add txgraph diagrams/mining/eviction
• Update secp256k1 subtree to latest master
• test: refactor: negate signature-s using libsecp256k1
• Remove the legacy wallet and BDB dependency
• subprocess: Backport upstream changes
• validation: write chainstate to disk every hour
• wallet: refactor: various master key encryption cleanups
• Bugfix: Miner: Don’t reuse block_reserved_weight for “block is full enough to give up” weight delta
• net: Use GetAdaptersAddresses to get local addresses on Windows
• validation: log which peer sent us a header
• wallet: Disable creating and loading legacy wallets
• validation: set BLOCK_FAILED_CHILD correctly
• rpc: Allow fullrbf fee bump in (psbt)bumpfee

BDK

• fix(chain): persist first_seen
• Add is_empty methods to TxUpdate and {}_Response types
• feat!(chain): implement first_seen tracking
• Release bdk_chain v0.22.0
• Introduce canonicalization parameters
• Canonicalization should handle transactions that spend from two conflicting transactions

rust-bitcoin

• fix error grater to greater array_vec.rs
• Add trait to InputWeightDescription
• BREAKING: Change Psbt serde implementations
• feat(p2p): add AddrV2 <> IpAddr conversions
• Fix FeeRate::checked_add/sub
• Use / to divide fee by weight
• units: Kill mutants found in weekly mutation testing
• psbt: replace the fee rate magic numbers with named constants in tests
• feat(p2p): add AddrV2 <> SocketAddr conversions
• Improve chacha20 cipher performance

• [Implementing Div<NonZeroU64

  I64> for Amount, SignedAmount, FeeRate, and and Weight](https://github.com/rust-bitcoin/rust-bitcoin/pull/4461)

• Add Builder::with_capacity()
• primitives: Add an API test module
• Do lock time renames
• locktimes: replace MtpAndHeight type with pair of BlockMtp and BlockHeight
• Wrap secp256k1::XOnlyPublicKey to improve error handling
• Set deprecation to released date of to_inner
• bitcoin: remove torv2 support
• Add as_inner method to TweakedKeypair
• primitives: Add regression tests for Display implementations
• bip32: overhaul error types and add a “maximum depth exceeded” error
• Add ControlBlock constructor that takes a hex string
• test: push minimality check for zero(empty)
• Introduce and use test_hex_unwrap macro in internals
• controlblock::decode unused variant
• primitives: replace error propagation with expect
• Implement FromIterator for Witness
• Accessing XOnlyPublicKey from bitcoin::taproot
• Deserialize witness from a list of hex strings

libsecp

• Assert field magnitude at control-flow join
• bench_ecmult: add benchmark for ecmult_const_xonly

Core Lightning

• 25.05rc1
• wallet: fix incorrect channel_htlcs id migration.
• Peer storage enable
• common/bolt11: validate public keys in routing hints
• msggen: add signmessagewithkey
• psbt: unused code path could leak
• splice: Eclair Interop — reestablish corner case
• Reckless: Add an update command
• askrene: fix integer overflow for dummy channels
• askrene-inform-channel: change order of operations
• Sendonion: add total amount
• Splice: Interop Final (probably) with Eclair
• Signmessage
• Workaround for LND to cause a force-close on our channel
• bcli: don’t try asking non-full nodes for blocks.
• gossipd: don’t try to connect to ourselves if we need more peers.
• Fix fee calculations
• pyln-client: Adding disableoffer, enableoffer, fetchinvoice, listoffers and offer commands
• pyln-client: reimplement NodeVersion, simply.
• Handle closed channels better.
• listhtlcs pagination

eclair

• Stricter batching of commit_sig messages on the wire
• Add low-level taproot helpers
• Attributable failures
• Add an option to specify a custom signet tx to check
• Increase default revocation timeout
• Remove LegacyClaimHtlcSuccess transaction class
• Remove duplication around skipping dust transactions
• Simplify channel keys management

LDK

• Do not dip into the funder’s reserve to cover the two anchors
• Introduce interactive signing state flags for funded states.
• Add a simple test of upgrading from LDK 0.1 and correct in_flight_monitor_updates on upgrade
• Pass supported_protocols to LSPS0 (fix ListProtocols support)
• Expose inner field of LSPSDateTime constructor
• Store Feature flags in line rather than on the heap by default (without increasing their size)
• Drop background processor futures feature
• Sweeper async change destination source fetching
• Do not fail to load ChannelManager when we see claiming payments
• Disallow dual-sync-async persistence without restarting
• Log which hop in a path was the most limiting in capacity
• (RFC) move the bolt12 invoice inside HTLCSource::OutboundRoute
• Use LocalHTLCFailureReason in Onion Processing
• Expand PaymentClaimable to include all inbound channel IDs for a payment
• Make generate_test_routes deterministic based on its seed
• Use floor when computing max value of a path, not ceil
• (3/3) Add Failure Reason to HTLCHandlingFailed
• avoid panic when truncating payer_note in UTF-8 code point
• Add idempotency check to prevent duplicate InvoiceReceived events
• Fix spurious MPP pathfinding failure
• lightning-liquidity: Introduce EventQueue notifier and wake BP for message processing

lnd

• graph/db: init SQLStore caches and batch schedulers
• feat(lncli): Add –route_hints flag to sendpayment and queryroutes
• lnwire: add lnwire.OpaqueAddr case in WriteElement for channel back-ups
• (graph-work-side-branch): side branch for graph work
• peer+lnd: add new CLI option to control if we D/C on slow pongs
• graph/db: remove ChannelGraph cacheMu
• graph/db: synchronous topology client subscriptions/cancellations
• bimodal pathfinding probability improvements
• multi: use updated TLV SizeFunc signature
• lncli: establish connection after parsing of mc data for loadmc
• lncli: add loadmc command
• routing+migration: fix mission control migration with nil failure msg
• sweep: return all inputs in PendingSweeps
• lnwallet: fix InternalKeyForAddr for imported addr
• lnrpc+rpcperms: add ctx metadata pairs to RPCMiddlewareRequest
• htlcswitch+routing: add funding blob to PaymentBandwidth
• lnwallet: no need to consult the aux unit for legacy channels
• mulit: increase logprogress time

BIPs

• BIP 53: Disallow 64-byte transactions
• bip-0331: correct size of version field in sendpackages
• BIP 443: OP_CHECKCONTRACTVERIFY
• BIP-345: withdraw
• BIP48: Add P2SH-P2WSH and P2TR mainnet examples
• BIP172: Define Bitcoin Subunits as Satoshis
• BIP177: Redefine Bitcoin’s Base Unit
• BIP48: Add p2tr script type derivation
• BIP 54: Consensus Cleanup
• BIP 321: URI Scheme (Replace BIP 21 with a new BIP containing information about more modern usage of it)
• BTCPay Server and NBitcoin supporting BIP388

BLIPs

• fix: link to Torv3 hidden service specification

BOLTs

• Require minimally-encoded features in BOLT 11 invoices

Events and Podcasts

• bitcoin++ livestream main stage - day 1, day 2, day 3

Mining

• Cambridge Digital Mining Industry Report
• Leveraging Surplus Electricity: Profitability of Bitcoin Mining as a National Strategy in South Korea
• Parasite Pool: Igniting the Mining Insurrection
• SLICE: Making PPLNS Work for Demand Response
• Trusting the Trustless: How Public P2Pool Nodes Worked for Bitcoin Miners

Miscellaneous

• Arkade: A Virtual Execution Layer for Bitcoin-Native Applications
• Another explanation of how Ark works
• Broly – Trust-minimized Bitcoin inscriptions directly from your Starknet wallet
• Coinbase: Standing Up to Extortionists
• Crypto Investor Charged With Kidnapping and Torturing Man for Weeks
• Liquidity requirements for Lightning payments: Ark servers and LSPs compared
• Maelstrom Fund writes grant for Ben Allen
• Optimal off-chain rebalancing scheme to mitigate channel depletion
• On relay policy and recent OP_RETURN drama
• OpenSats - Eleventh Wave of Bitcoin Grants
• Removing Bitcoin’s Guardrails
• Spiral grants - dangould, joschianbtc, mauricepoirrier
• Tangerine Upgrade: BitVM Activation on Clementine & Core Protocol Upgrades
• The 2015 Spam Attacks
• The MEVil of Relay Policy
• Trump’s stablecoin chosen for $2 billion Abu Dhabi investment in Binance
• Wallet of Satoshi launching non-custodial wallet in the US