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

• Minsc, a Miniscript-based scripting language
• Advances in Bitcoin Contracting : Uniform Policy and Package Relay

lightning-dev

• Dynamic Commitments: Upgrading Channels Without On-Chain Transactions

Optech

• Newsletter #104
• Newsletter #105
• Newsletter #106
• Newsletter #107
• Newsletter #108

Network Data

• New statistical model for calculating Bitcoin’s hashrate
• Cloudflare DNS outage effect on bitcoin transaction rate
• Withdrawal of ERC-20 tx from Coinbase takes four transactions
• Have I been known?
• Segwit batching case study
• Following the Blockchain.com feerate recommendations
• Q1 2020 darknet useage on Bitcoin
• Dumplings - Analyze CoinJoin data

CVEs and Research

Research

• UTXO Management for Enterprise Wallets
• Bitcoin Mining Hashrate and Power Analysis
• SmartBugs: A Framework to Analyze Solidity Smart Contracts
• Post-Quantum Adaptor Signaturesand Payment Channel Networks
• SoK: A Taxonomy of Cryptocurrency Wallets
• FROST: Flexible Round-OptimizedSchnorr Threshold Signatures
• Undercutting Bitcoin Is Not Profitable

InfoSec

• The fastest draw on the Blockchain: Ethereum backrunning
• Ethereum Mempool Manipulation
• Working with Binance to return stolen funds to a victim
• Samourai wallet address reuse bug
• Counterfeit Cisco devices
• Ledger js signing issue
• Supply chain attacks on Ledger Nano X
• Hunting for Re-Entrancy Attacks in EthereumSmart Contracts via Static Analysis
• BasicBlocker: Redesigning ISAs to Eliminate Speculative-Execution Attacks
• Ethereum Classic 51% Attack

Pull Requests and repo updates

Bitcoin Core

• add C++17 release note for 0.21.0
• sendtoaddress/sendmany: Add explicit feerate option
• Reduce inv traffic during IBD
• Replace automatic bans with discouragement filter
• Add gettxoutsetinfo hash_type option
• Extract download permission from noban
• Use wtxid for transaction relay

BIPs

• BIP 339: WTXID-based transaction relay
• BIP 118: SIGHASH_ANYPREVOUT
• BIP 325: signet, change signature scheme to be tx-based

eclair

• Rework feerate mismatch
• Postgresql support
• Find multi part route
• Multipart FSM v2
• Implement the KeySend feature, spontaneous payments
• Anchor output transaction format

c-lightning

• C-Lightning v0.9.0: Rat Poison Squared on Steroids
• Implement keysend sending support for spontaneous payments
• Implement multi-part payments (MPP) sending support
• Paymod: Payments reimagined (part 01)
• Paymod: Payments reimagined (part 02)
• Paymod: Payments reimagined (part 03)
• Paymod: Payments reimagined (part 04)
• PSBT RPC calls
• PSBTs, Meet the HSM
• New pyln modules
• Reserve/unreserve/fundpsbt
• Summary plugin now shows you how available your peers are

lnd

• Multi: I wumbo, you wumbo, he she wumbo
• Multi: hold keysend payments
• Multi: add a rpc endpoint to track the recovery process
• PSBT: add no_publish flag for safe batch channel opens v2
• Add max value in flight flag
• Add new HostAnnouncer to support dynamic IPs via domains
• Kvdb+etcd+tests: change etcd flattened bucket key derivation to make it compatible with bbolt
• Contractcourt: Persist Resolution Outcomes
• Intercept forward htlc
• REST saga 3/3: REST API for subservers, websocket for streaming responses

joinmarket

• python-bitcointx backend for jmbitcoin + bip78 and snicker

Events

• London BitDevs - Socratic Seminar on Coinswap
• London BitDevs - Socratic Seminar on BIP Schnorr
• London BitDevs - Socratic Seminar on BIP Taproot
• Chicago BitDevs - Socratic Seminar 10

Miscellaneous

• NIST’s post-quantum cryptography program enters ‘selection round’
• Completely offline bitcoin transactions
• DLC-based P2P derivatives beta application
• Utreexo demo release
• NiceHash mining payouts over lightning
• specter-desktop 0.5.5
• Call to action: improving and testing asmap
• Electrum 4.0.0 with lightning support
• Electrum Server performance report
• LNURL allowances specification
• Path to taproot activation