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

• [update] Detailed protocol design for routed multi-transaction CoinSwap appendium

lightning-dev

• Hold fees: 402 Payment Required for Lightning itself

Optech

• Newsletter #117
• Newsletter #118
• Newsletter #119
• Newsletter #120
• Newsletter #121

Network Data

• CBPI: A New Way To Measure Bitcoin Network Electrical Consumption
• 144 block average block times are at YTD highs
• Analysis of the funds flow following KuCoin hack
• Public blockchain fee cyclicality and negative feedback loops
• Hashrate Index research aggregation
• Analyzing the Fallout from the BitMEX Lawsuits
• Lightning network topology data

CVEs and Research

Research

• MuSig2: Simple Two-Round Schnorr Multi-Signatures / Summary

InfoSec

• CVE-2020-26896: LND Invoice Preimage Extraction / Full Disclosure
• CVE-2020-26895: LND Low-S Tx-Relay Standardness / Full Disclosure
• Monero unlock_time attack against Ledger and Trezor
• Flash loan is used to pass MakerDAO governance vote
• $34 million harvest.fnance hack
• MosaicRegressor: Lurking in the Shadows of UEFI

Pull Requests and repo updates

Bitcoin Core

• BIP-325: Signet
• ZMQ: Create “sequence” notifier, enabling client-side mempool tracking
• Ignore unknown messages before VERACK
• zmq: Add support to listen on multiple interfaces
• net: Use alternative port for incoming Tor connections
• Complete the BIP155 implementation and upgrade to TORv3
• Implement BIP 340-342 validation (Schnorr/taproot/tapscript)
• Overhaul transaction request logic
• wallet: Add sqlite as an alternative wallet database and use it for new descriptor wallets
• RPC: getpeerinfo: Deprecate “whitelisted” field (replaced by “permissions”)
• p2p: Try to preserve outbound block-relay-only connections during restart

libsecp

• Rip out non-endomorphism code + dependencies

BIPs

• BIP155: include changes from followup discussions
• BIP-322: switch to using tx based approach

eclair

• Eclair v0.4.2
• Fees: add per-node feerate tolerance
• Plugin: messaging between two peers
• Plugin: implementation of keysend spontaneous payments

c-lightning

• Add a commitment feerate parameter to multifundchannel
• JSON Notification support
• Optimize PostgreSQL binary lookup
• Fuzz testing integration
• Updating signet chainparams for the latest PoW fix

lnd

• lnd v0.11.1-beta
• loop v0.11.0-beta
• faraday v0.2.2-alpha
• Disk: high write load on HDD
• Lncli: allow configurable timeout in send payment
• Htlcswitch: disallow circular routes on same channel
• Chain: ability to spend unconfirmed coins when making onchain transactions
• Lnd+config: allow Let’s Encrypt listen IP to be set
• PSBT funding: allow final TX to be specified as raw wire format transaction
• Config: add new max channel size config option
• Anchor: make the anchor commitment type spec compliant

joinmarket

• joinmarket v0.7.1

Wasabi

• Wasabi v1.1.12.2

Events and Podcasts

• SLP 291 - Nadav Kohen: What You Should Know About Bitcoin DLCs
• DTRH7 - Bitcoin Tech with Ben Carman & Nadav Kohen
• BTCTKVR S6 E9: Jonas Nick, Peter Todd & Alekos Filini on Bitcoin Development

Miscellaneous

• What’s Coming To The Bitcoin Core Wallet in 0.21
• Activating soft forks in Bitcoin
• Liquid P2P Loans
• Taproot activated on default signet
• Enterprise Bitcoin engineering at River Financial
• DLC Key Management Pt 3: Oracle Public Key Distribution
• Statechains non-interactive novation
• SNARKs and the future of blockchains
• Current Status of the Utreexo Project
• Autotuning Bitcoin Miners
• ZEBEDEE Lightning Wallet
• CLBOSS Automated C-Lightning Node Manager - GitHub / 0.2: TV Tropes Will Ruin Your Life
• 10x Security Bitcoin Guide
• Bitcoin UX / Payments Research by PeakShift
• Bitcoin Wallet Tracker v0.1.5
• Atomic Odds, powered by Discreet Log Contracts
• BlueWallet introduces PayJoin support
• MarcoFalke receives development grant from OKCoin
• Electrum v4.0.4