Announcements

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Mailing Lists, Meetings and Bitcoin Optech

Mailing Lists

bitcoin-dev

• Timewarp Attacks and Long-Term Timelocked Script Paths
• Great Consensus Cleanup Revival
• BIP for OP_CHECKSIGFROMSTACK
• Updated BIP for OP_CAT
• BIP for OP_INTERNALKEY
• The Future of Bitcoin Testnet
• Signing a Bitcoin Transaction with Lamport Signatures (no changes needed)
• Draft BIP for User-Defined Transaction Flags Policy & Strategy

Delving Bitcoin

• Exploding Keys - Covenant construction
• LIMO: combining the best parts of linearization search and merging
• Analyzing simple vault covenant with Alloy
• LRC-20: Scalable and Fast Tokenization on Lightning
• Second Look at Weak Blocks
• Research into the effects of a cluster size limited mempool in 2023
• Inscriptionless Inscriptions
• Constellation - a high performance Lightning-based L3. Feedback wanted
• Payjoin-in-Potentiam: Externally fund an LSP channel open with one transaction
• DSL for experimenting with contracts

Meetings

• Bitcoin PR Review Club

• Bitcoin Core general developer meetings
  • March 28
  • April 4
  • April 18
  • April 25
• Lightning Specification meeting
  • April 8
  • April 22

Optech

• Bitcoin Optech Newsletter #299
  • Bitcoin Optech Newsletter #299 Recap Podcast
• Bitcoin Optech Newsletter #298
  • Bitcoin Optech Newsletter #298 Recap Podcast
• Bitcoin Optech Newsletter #297
  • Bitcoin Optech Newsletter #297 Recap Podcast
• Bitcoin Optech Newsletter #296
  • Bitcoin Optech Newsletter #296 Recap Podcast
• Bitcoin Optech Newsletter #295 Recap Podcast

Network Data

• Halving Fee Chaos
• Invalid F2Pool blocks 783426 and 784121 (April 2023)
• Invalid blocks being mined on testnet
• Last notable enables full-RBF (ViaBTC)
• List of pools participating in Antpool’s tx accelerator
• [LND nodes fail to broadcast txs with Bitcoin Core 27.0]
• Ocean halving block template left 37 BTC in fees on table
• OP_CAT live on signet at block 193536
• Spiderpool attempts reorg
• ViaBTC mines the halving block - Block reward 40.71 BTC
  • Epic sat sold for 33.3 BTC
• ViaBTC transaction prioritization scheme broken, response

CVEs and Research

Research

• A Primer on Bitcoin Cross-Border Flows
• Efficient and Reliable Service Detection on Bitcoin
• Efficient Linkable Ring Signatures: New Framework and Post-Quantum Instantiations
• Statistical Confidence in Mining Power Estimates for PoW Blockchains
• SQIAsignHD: SQIsignHD Adaptor Signature

InfoSec

• CVE-2024-3094: Timeline of the xz open source attack
  • Everything I Know About the XZ Backdoor
  • OSS-security post
  • FAQ on the xz-utils backdoor
  • Infographic

Pull Requests and repo updates

Bitcoin Core

• build: Enable fuzz binary in MSVC
• net: attempts to connect to all resolved addresses when connecting to a node
• index: race fix, lock cs_main while ‘m_synced’ is subject to change
• feefrac: avoid explicitly computing diagram; compare based on chunks
• Improve display address handling for external signer
• net: Decrease nMaxIPs when learning from DNS seeds
• ZMQ: Support UNIX domain sockets
• Change Luke Dashjr seed to dashjr-list-of-p2p-nodes.us
• security: restrict abis in bitcoind.service
• assumeutxo: Fix -reindex before snapshot was validated
• minisketch: update subtree to 3472e2f5ec75ace39ce9243af6b3fee233a67492
• AcceptMultipleTransactions: Fix workspace not being set as client_maxfeerate failure
• crypto: chacha20: always use our fallback timingsafe_bcmp rather than libc’s
• Update libsecp256k1 subtree to latest master
• Remove libbitcoinconsensus
• 29242 Diagram check followups
• wallet: Add createwalletdescriptor and gethdkeys RPCs for adding new automatically generated descriptors
• mempool: Log added for dumping mempool transactions to disk

BDK

• Simplified EsploraExt API
• Fix: enable blocking-https-rustls feature on esplora client
• [wallet] Improve address API
• fix(wallet): remove the generic from wallet
• Fix last seen unconfirmed

rust-bitcoin

• psbt: Return internal key for key path spend
• Implement ArbitraryOrd for relative::LockTime
• internals: Release tracking PR v0.3.0
• Automated nightly rustfmt (2024-03-31)
• Introduce new one ACK carve-out rule

libsecp

• Signed-digit multi-comb ecmult_gen algorithm

Core Lightning

• msggen: add disableoffer method
• plugin/clnrest: Adding new config param as clnrest-swagger-root
• msggen: add delforward method
• Fetch block from a peer if we don’t have it
• msggen: add low level fundchannel methods
• msggen: add delpay method
• Plugin wss proxy
• msggen: add low level openchannel methods
• schema: add multifundchannel generation
• Pay: payment removal cleanup
• pay: fix re-adding payment amount back to estimated capacity
• Renepay patch htlc_max=0 cases
• Reallow no gossip queries

eclair

• Relax assumptions about gossip_queries

LDK

• Implement PSBT fields that were missing for a Signer
• Add splicing feature flag
• Add OutputSweeper utility persisting and sweeping spendable outputs
• Include a PaymentContext in PaymentPurpose
• Add tx_signatures.tlvs field (splicing-specific field in dual funding message)
• Fix race between handshake_complete and timer_tick_occurred
• Compact blinded path handling
• Delay broadcasting Channel Updates until connected to peers
• Reserve async signing related channel TLV types
• Support sending custom TLVs to to blinded recipients
• Support decoding HTLC onions once fully committed

lnd

• tlv: add new types and functions
• rpc: add default conf target back
• (3/3): Blinded Route Error Handling
• dont use sweeper unconfirmed utxos
• sweep: add docs and remove dead code
• lnrpc: rejects positive inbound fees by default
• tlv: add axiomatic RecordProducer implementation for Record
• (2/3): Support Forwarding of Blinded Payments
• coin select: add coin selection strategy option to all on-chain RPCs
• lnd: fix sweepall argument call.
• routing: inbound fees send support
• htlcswitch: add inbound routing fees receive support
• (1/3): Preparatory work for Forwarding Blinded Routes

BIPs

• Update bip-0129.mediawiki
• BIP 2: Allow editors to fix typos
• BIP 331: Ancestor Package Relay
• Finalize BIP-47
• BIP2: update BIP editors
• BIP-00{43,49,84}: move to Standards Track + BIP-0044: mark as Final

New Releases

• bitcoin-inquisition v25.2

Events and Podcasts

• Bitcoin Halving block template livestream

Mining

• 3nm chip headed to the foundry, our new mining system, and more
• Antminer S21 Technical Deep Dive
• AntPool & Bitmain Acting as ‘a Pool of Pools’
• March 2024 Bitcoin Miner monthly update
• Hashrate Index Roundup - April 8, April 22
• The Halving Aftermath

Miscellaneous

• Assigning BIP Numbers
• Bitcoin Core Contributor Challenges
• BitGo transitions to Native Segwit
• BitVM Bridges Considered Unsafe
• Cashu-based reward system for a pleb-friendly Bitcoin Mining Pool
• CatVM
• Chaincode Labs Bitcoin Scholarship
• CISA Research
• FBI probed bitcoin core developer event linked to Luke Dashjr’s BTC hack: Mike Schmidt
• Federated Lightning Addresses for Mutiny+ Users
• How does CoinGrinder find the minimum input weight?
• How Kraken Wallet addresses challenges in mobile crypto security
• HRF CISA Research Fellowship
• Killing FPPS pools
• OpenSats Receives $1M Donation From The Reynolds Foundation
• Satoshi’s 2014 Email Hack
• Stop Calling It MEV
• Storing information in blocks via transaction ordering
• Team Slow and Steady
• The Untold Story of ditto-b
• Founders And CEO Of Samourai Wallet Arrested And Charged With Money Laundering And Unlicensed Money Transmitting Offenses
  • Phoenix Wallet pulls out of US market
  • Wasabi Wallet and zkSNACKs family of products now blocking US residents
• zkCoins