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

• Progress on bech32 for future Segwit Versions (BIP-173)
• New PSBT version proposal
• BIP-0322 (generic signmessage) improvements

lightning-dev

• Recovery of Lightning channels without backups
• Mitigating Channel Jamming with Stake Certificates
• Covert channel recovery with Oblivious Signatures

Optech

• Newsletter #126
• Newsletter #127
• Newsletter #128
• Newsletter #129 - Year-in-review Special

Network Data

• Stale block at 662642
• Bitcoin UTXO Creation & Destruction - Block 0 to 661045
• Kucoin hack investigation
• First multi-transaction coinswap on testnet, details

Research

• RouTEE: A Secure Payment Network Routing Hubusing Trusted Execution Environments
• Battlement: A Quorum Based Design for Lightning Network Key Management
• A Tale of Two Layers: The Mutual Relationship between Bitcoin and Lightning Network
• Verification of Recurisive Bitcoin Contracts
• Pricing Security in Proof-of-Work Systems

InfoSec

• Ledger customer database leaked
  • Tracking coins from Ledger phishing attacks
• Cover protocol mining contract exploiit
• ColdCard isolation bypass
• Authentication bypass vulnerability in Bouncy Castle

Pull Requests and repo updates

Bitcoin Core

• fuzz: Link all targets once
• Don’t send ‘sendaddrv2’ to pre-70016 software, and send before ‘verack’
• Expose high bandwidth mode state via getpeerinfo
• Periodically make block-relay connections and sync headers
• Disable fee estimation in blocksonly mode (by removing the fee estimates global)

BIPs

• BIP155: change when sendaddrv2 is to be sent #1

eclair

• Distribute connection-handling on multiple machines using akka-cluster

c-lightning

• c-lightning v0.9.2 / blog
• Offers: Part 1, Spec import and basic infrastructure
• Hsmtool: enable dumping output descriptors of onchain wallet

lnd

• lnd v0.12.0-beta.rc2
• multi: add new config option to toggle gossip rate limiting
• anchors: zero-fee HTLC secondlevel transactions
• chanbackup: update on-disk backup file with unconfirmed channels
• routing: proportional attempt cost
• lnrpc+tor: add network connection timeout
• channeldb/kvdb/bolt: automatically compact database on startup
• walletrpc: add new PSBT creation+signing RPCs

BOLTs

• Trampoline Routing (2021 edition)
• feature: define option_zero_htlc_tx_fee

wasabi

• wasabi v1.1.12.3

joinmarket

• WIP: Added needed functionality for SNICKER in basic form
• Drop support for pre-0.17 Bitcoin Core

Events and Podcasts

• Bitcoin Core Code Review streams - achow101, carl dong and murch
• Fabian Jahr - Debugging Bitcoin Core Workshop transcript
• Lightning Network Hacksprint
• BlockChannel - Learning to Swim in the Lightning Pool w/ roasbeef
• Clara Shikhelman - Lightning Network Economics: Cost-Minimal Channels and their Implications for Network Structure
• Jonas Nick - MuSig-DN: Schnorr Multi-Signatures With Verifiably Deterministic Nonces
• Chaincode Podcast - Carl Dong on Reproducible Builds transcript
• Block Digest - Peter Todd on Opentimestamps

Miscellaneous

• Verify Your Bitcoin Core Download
• Reproducible Builds With Gitian (1/2)
• Bitcoin CoreDev Reflections 2019-2020
• StackExchange answers on soft fork activation methods 1, 2
• Open source Apple code signing tool
• bitcoin-teleport
• Ride The Lightning v0.10.0
• Liquid network browser extension
• Announcing Bitcoinex
• RoninDojo v1.8.0
• replay historical lightning network gossip messages
• Here Come the Exchanges
• Toward a lightning node in the browser
• Bulk preorders for the latest bitcoin ASIC miners are sold out until next spring
• Coinbase Crypto Community Fund provides grants to promag and 0x1B10C
• Square Crypto Grants:
  • Justin Moon
  • Leon Johnson
  • Patricia Estevão
  • ZmnSCPxj
• Signet faucet
• belcher work diary
• Lightning This Week #662,816
• Lightning This Week #660,375
• Mitigating Channel Jamming with Stake Certificates
• Lightning Network Time Machine
• BITCOIN GAMING 2020 RETROSPECTIVE
• ZEBEDEE: Counter Strike Infused with Satoshis