Announcements

Until our community can meet again in person, we’ll continue to share all the latest research and development on Bitcoin, Lightning and related technologies through our monthly newsletter.

Mailing Lists and Bitcoin Optech

Mailing Lists

bitcoin-dev

• Bulletin boards without selective censorability for bitcoin fungibility markets

lightning-dev

• Lightning Pool: A Non-Custodial Channel Lease Marketplace
• Mitigating Channel Jamming with Stake Certificates

Optech

• Newsletter #122
• Newsletter #123
• Newsletter #124
• Newsletter #125

Network Data

• Kucoin hacked funds flow - 1, 2
• The Growth of Merge Mining
• Second largest negative difficulty adjustment
• RBF trending upwards
• OFAC compliant mining pool
• 2 block stale chain
• 2020 Bitcoin node performance tests
• Taproot activation initiative
• OKEx mining pool loses 99.5% of hashpower
• CoinJoin Flagging
• lnresearch data

CVEs and Research

Research

• MuSig2: Simple Two-Round Schnorr Multisignatures
• Transferring In-Channel Lightning DLCs
• Uniswap’s Financial Alchemy
• A Survey of ECDSA Threshold Signing
• PayMo: Payment Channels for Monero
• Is Bitcoin Really Untethered?
• Revault: a multi-party vault architecture
• Verification of Recursive Bitcoin Contracts
• Costs of an Attack Against Proof-of-Work
• Tracking Counterfeit Cryptocurrency End-to-end
• How to Not Get Caught When You Launder Money on Blockchain?
• Characterising Proxy Usage in the BitcoinPeer-to-Peer Network
• Gotta Catch’em All!Improving P2P Network Crawling Strategies

InfoSec

• How nearly all personal hardware wallet multisig setups are insecure
• NAT Slipstreaming
• Tron block production halted by attacker
• $1M frozen in Perfect Finance contract
• ETH (Geth) accidental hard fork
• Akropolis token pool drained of $2M
• Pickle Finance $20M DAI exploit
• GoDaddy employees targed in attack on cryptocurrency services
• Mitigating Channel Jamming with Stake Certificates
• PLATYPUS SGX attack
• Monitoring Performance Metrics is not Enough to Detect Side-Channel Attacks on Intel SGX

Pull Requests and repo updates

Bitcoin Core

• Bitcoin Core v0.21.0 rc2
• wallet: introduce fee_rate sat/vB param/option
• Drop the leading 0 from the version number

BOLTs

• Prevent preimage reveal collision while claiming onchain incoming HTLC

eclair

• Improve MPP-send for direct channels: part 1, part 2, part 3
• High fee tolerance for small channels
• Allow plugins to force reconnect
• Segregate the node seed from the channel seed

c-lightning

• v0.9.2 Now with 0-of-N Multisig
• Fix: channel closer on unilateral to remote
• Optional “failure_onion” in reply to htlc_accepted hook

lnd

• Discovery: rate limit incoming channel updates
• Multi: update listsweeps to allow sweeps that are not in ListTransactions
• Features+invoices: force MPP payload inclusion for non-keysend payments
• Sweeper: support Inputs with required locktimes and txOuts

joinmarket

• joinmarket v0.8.0

Events and Podcasts

• The Chaincode Podcast - Mark ‘Murch’ Erhardt and UTXO Management/Enterprise Wallets
• The Chaincode Podcast - Carl Dong and Build Systems

Miscellaneous

• Lightning This Week #657,227
• Lightning This Week #658,364
• Lightning This Week #659,409
• Autoloop: Lightning Liquidity You Can Set and Forget
• Autoloop: V2 Features
• Zeus 0.4.0
• p2pderivatives-client v0.2.0
• Lightning Terminal v0.3.0
• specter-desktop - v0.9.1 v0.10.0
• k256 - pure Rust secp56k1 library
• btpayserver NDLC support
• bisq v1.5.0
• bitcoin wallet tracker v0.2.0
• minsc v0.2.0
• BlueWallet v5.6.7
• Sparrow v0.9.7
• Introducing Nunchuck: Multisig Made Easy
• Brink Foundation
  • First fellowship awarded to Gloria Zhao (with support by Square Crypto
• Bitcoin privacy and tainting: CoinJoins and CoinSwaps meet Statechains
• Formal specification of Miniscript in Alloy
• This month in privacy newsletter
• Low Bandwidth Bitcoin