Announcements

Until our community can meet again in person, we’ll continue to share all the latest research and developments through our monthly newsletter.

Mailing Lists and Bitcoin Optech

Mailing Lists

bitcoin-dev

• Full Disclosure: CVE-2021-31876 Defect in Bitcoin Core’s bip125 logic
• A Stroll through Fee-Bumping Techniques : Input-Based vs Child-Pay-For-Parent
• L2s Onchain Support IRC Workshop: Agenda & Schedule
• Airgap interoperability spec
• Improvement on Blockbuilding

lightning-dev

• On Mempool Funny Games against Multi-Party Funded Transactions
• Improving Payment Latency by Fast Forwards

Optech

• Newsletter #147
• Newsletter #148
• Newsletter #149
• Newsletter #150

Network Data

• Observing Bitcoin Mining Pools
• Bitcoin miners generated $1.7 billion in revenue during April
• Analysis of empty blocks

Research

• Bitcoin Privacy - A Survey on Mixing Techniques
• LNGate: Powering IoT with Next Generation Lightning Micro-payments using Threshold Cryptography
• Analysis of Bitcoin Vulnerability to Bribery Attacks Launched Through Large Transactions
• The Complex Community Structure of the Bitcoin Address Correspondence Network
• Lightning Network Economics: Channels
• Formal Methods for Secure BitcoinSmart Contracts
• Who is Liable for Non-Compliant Cryptocurrency Transactions: Should Transaction Validators be Held Liable?
• SCSGuard: Deep Scam Detection for Ethereum Smart Contracts
• Reentrancy Vulnerability Identification in EthereumSmart Contracts
• Targeting the Weakest Link: Social Engineering Attacks inEthereum Smart Contracts
• T-Cash: Transferable Fiat Backed Coins
• Faster Blockchain Validation with Utreexo Accumulators
• Out of Order Block Validation with Utreexo Accumulators

InfoSec

• Malicious tor exit relays perform SSL stripping attacks on users visiting Bitcoin mixers
• Running list of all DeFi Hacks (14 this month)
• Ethereum DoS Vulnerability Disclosure
• Polkdaot block production halts, Rust compiler bug
• M1RACLES - M1 covert channel
• “Half-Double” Next-Row-Over Assisted Rowhammer
• Ransomware Attack Shuts Down Biggest U.S. Gasoline Pipeline, Closer Look, Server Seized, taint analysis
• Cross-browser tracking in Tor, Safari, Chrome and Firefox

Pull Requests and repo updates

Bitcoin Core

• rpc/validation: enable packages through testmempoolaccept
• multiprocess: Add basic spawn and IPC support
• Coinstats Index
• Remove RewindBlockIndex logic
• Support up to 20 keys for multisig under Segwit context
• Enable changing the autoprune block space size in intro dialog
• guix: Add guix-{attest,verify} scripts
• Remove user input from URI error message
• rpc: include_unsafe option for fundrawtransaction
• p2p, rpc: enable GetAddr, GetAddresses, and getnodeaddresses by network

libsecp

• add secp256k1_ec_pubkey_cmp method

BIPs

• BIP341: speedy trial activation parameters
• BIP 87: Hierarchy for Deterministic Multisig Wallets
• BIP 88: Templates for Hierarchical Deterministic derivation paths
• BIP 129: Bitcoin Secure Multisig Setup (BSMS)

c-lightning

• add a funder plugin
• EXPERIMENTAL: quiesence protocol
• plugin: Allow plugins to publish and subscribe to custom notifications

lnd

• lnrpc: allow AMP pay-addr override + bump invoice timeouts
• [anchors] cap value reserved for anchor fee bumping
• Support paying AMP invoices via SendPaymentV2

New Releases

• c-lighting 0.10.0
• Eclair 0.6.0
• rust-lightning 0.0.14
• lnd v0.13.0-beta.rc3
• SideSwap 1.0.3 with Liquid Peg Outs
• Mercury Wallet 0.2.24
• joininbox 0.4.0
• sparrow 1.4.1
• phoenix 1.4.12
• BlueWallet 6.1.0
• umbrel 0.3.10
• nix-bitcoin 0.0.45
• lightning-kmp
• specter-desktop 1.4.0
• xmr-btc-swap 0.6.0, 0.7.0
• polar 1.3.0

Events and Podcasts

• Citadel Dispatch e0.2.0 - the liquid network, bisq, and bitcoin privacy with Adam Back and Wiz
• Unhashed Podcast Ep. 134 - Alejandro de la Torre on Miner Taproot Signalling
• The Van Wirdum Sjorsnado - Replace-by-Fee Bug
• The Van Wirdum Sjorsnado - Mara Pool and Mining Censorship
• SLP275 - Pavel Moravec – SlushPool Signalling For Taproot
• SLP276 Anthony Ronning – Bitcoin Lightning Privacy: FUD and Facts
• SLP277 Alejandro De La Torre – Coordinating Bitcoin Upgrades With Mining Pools
• SLP278 Matt Odell & Ben Price – OpenSats: Bitcoin & Open Source Initiative
• The Chaincode Podcast - Matt Corallo and LDK
• Chaincode Decoded: Blockchain

Mining

• Buggy mining firmware breaks under BIP9
• Iran central bank declares use of non-Iranian mined bitcoin forbidden
• Iran bans cryptocurrency mining for 4 months amid power cuts
• Bitcoin hash rate drops as Sichuan miners face short-term power cap
• MARA pool stops creating OFAC compliant blocks
• Crypto Mining Booms on Cheap, Subsidized Energy in Argentina

Miscellaneous

• Sturm und drang und taproot activation
• First dual-funded channel
• Sidecar channels
• Current State of Lightning Network Privacy
• MuSig2 Benchmarking
• Benchmarks of IBD with safegcd-based modular inverses in libsecp256k1
• Chaincode Labs Online Seminars
• Tor-Only Bitcoin & Lightning Guide
• Six Differences Between Liquid and Lightning
• What block space savings would we get for coinjoins (and payjoins) if we had cross input signature aggregation?
• Breaking Down The Fee Market (EIP-1559)
• Terminal Web - Lightning node scoring
• Bitmatrix - constant product market maker on Liquid
• Human Rights Foundation Gives Out $210K in Bitcoin Development Grants
• Vitalik uses relay network to shield transaction from frontrunners
• Supporting Taproot at River
• Honeypot solidity contract
• Investigating Hydra: Where Cryptocurrency Roads All Lead to Russia and Go Dark
• Lightning Labs May newsletter
• Freenode staff steps down
• Multisig Guide
• TX PUSHER
• Raspberry Pi CM4 carrier board designed for cryptocurrency nodes