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

• A Replacement for RBF and CPFP: Non-Destructive TXID Dependencies for Fee Sponsoring

lightning-dev

• Simulating Eltoo Factories using SCU Escrows (aka SCUE’d Eltoo)
• SIGHASH_SINGLE + update_fee Considered Harmful

Optech

• Newsletter #113
• Newsletter #114
• Newsletter #115
• Newsletter #116

Network Data

• The 2020 Global Crypto Adoption Index
• Stale blocks: 650743, 650491
• Measuring Bitcoin’s Decentralization
• First lightning penalty in 3 months
• GLV endomorphism IBD analysis

CVEs and Research

Research

• Attacking Threshold Wallets
• MuSig-DN: Schnorr Multi-Signatures with Verifiably Deterministic Nonces
• Mimblewimble Non-Interactive Transaction Scheme
• Bitcoin–Monero Cross-chain Atomic Swap
• Anonymous proof-of-asset transactionsusing designated blind signatures

InfoSec

• CVE-2018-17145: Bitcoin InventoryOut-of-Memory Denial-of-Service Attack
• Spam attacks on lightning: HTLC exhaustion attack, HTLC exhaustion example attack, three types of lightning spam
• Vulnerability Disclosure and Decision to Pause New Loan Requests
• Sia secret hardfork
• Responsible Vulnerability Disclosure in Cryptocurrencies
• Analyzing a Generalized Front-Running Ethereum Arbitrage Bot Attack
• Escaping the Dark Forest
• Kucoin security incident update
• Kucoin hack estimated at $280 million
• ETERBASE $5 million hack
• bzx hacked $8 million recovered
• Electrum phishing attack continues
• Are Chinese Miners a Threat to Bitcoin?
• Wasabi vulnerability: disclosure, response

Pull Requests and repo updates

Bitcoin Core

• Protect localhost and block-relay-only peers from eviction
• zmq: enable tcp keepalive
• wallet: Remove -zapwallettxes
• rpc: fundrawtransaction and walletcreatefundedpsbt also lock manually selected coins
• Add send RPC
• Add -netinfo peer connections dashboard
• Remove the automatic creation and loading of the default wallet
• rpc: Return fee and vsize from testmempoolaccept
• BIP-325: Signet (consensus)

libsecp

• Add schnorrsig module which implements BIP-340 compliant signatures

BIPs

• BIP340 updates: even R, new tags, small fixups, clarifications
• bip-0325: clarify the OP_TRUE challenge special case

BOLTs

• More conservative cltv_expiry_delta recommendations

eclair

• Plugin messaging
• Anchor output: handle unilateral close
• Improve blockchain watchers

c-lightning

• v0.9.1: The Antiguan BTC Maximalist Society
• feat: notification channel_state_changed
• Multiwithdraw
• Dual-funding, accepter side only
• onchaind now scorches the earth when penalizing a revoked transaction

lnd

• lnd v0.11.1-beta.rc4
• lnd v0.11.1-beta.rc3
• Faraday v0.2.1-alpha
• Loop Server v0.9.0-beta
• chanfitness: Rate limit in memory events based on peer flap rate
• add new max channel size config option
• cnct+sweep: cpfp-aware anchor sweeping
• cnct+sweep+itest: preparations for cpfp-aware sweeper
• lncli: add profiles for easy multi-node management
• anchor commitment - Make the anchor commitment type spec compliant
• Advanced macaroons 1/2: Custom URI permissions
• Advanced macaroons 2/2: Custom macaroon validator for external subservers

joinmarket

• BIP78 receiver over a Tor hidden service

wasabi

• Continuous delivery
• WabiSabi efforts

Events and Podcasts

• TFTC #189: Fabian Jahr
• SLP205 Stepan Snigirev & Ben Kaufman - Specter Desktop Bitcoin Multisig
• SLP207 Roasbeef – Lightning Labs lnd Goes Wumbo
• SLP211 Steve Lee – Bitcoin Grants, Design & Crypto Patents (COPA)
• WBD: Bitcoin vs Ethereum Technicals with Vitalik Buterin, Andrew Poelstra, Tadge Dryja & Patrick McCorry

Miscellaneous

• Bitmain, Ebang Among 21 Bitcoin Mining Farms Stripped of Energy Perks in Inner Mongolia Signet faucet
• Triptych: A New Algorithm Protecting Monero Users
• Bitcoin Grants Tracker
• Square Crypto grants page
• John Pfeffer grant for Antoine Riard
• Why we may fail Lightning
• joinmarket.me downtime
• Blocknative Mempool Explorer
• Let’s Get Ready to Wumbo
• s-Bitcoin v0.4.0
• DLC oracle private key rotation
• Oracle key revocation and DLC cancellation
• U.S. preseidential election DLC bet
• It Is Never a Compiler Bug Until It Is
• Disconnecting Simplicity Expressions
• Don’t Mix Your Timelocks
• Introducing the AQUA Wallet
• All Paths Lead to Your Destination: Implementing Multi-Part Payments in c-lightning
• Lightning circuitbreaker
• Building on Liquid
• Faraday update
• Schnorr Applications: FROST
• Non-interactive Threshold Escrow (NITE)
• Venezuela Legalizes Crypto Mining but Will Force Industry Into National Pool
• This month in Bitcoin privacy - August
• Lightning Network Circuit Breaker