Special thanks to Chaincode Labs and NYU Blockchain Digital Asset Forum for food, refreshments and event space.

Presentation

• Jeff Vandrew Jr - Modular BTCPay Server

ML and Bitcoin Optech

Optech

• Newsletter 51
• Newsletter 52
• Newsletter 53
• Newsletter 54
• Newsletter 55
• Newsletter 56

ML

• Bitcoin Core to disable Bloom-based Filtering by default
• PSA: Upcoming disclosure of pre-v0.17.1 vulnerabilities

Network Data

• Invalid Block
• Coin Metrics State of the Network Series
• Casa Explorer

CVEs and Research

Research

• Rational Secret Sharing and Multiparty Computation
• Distributing any Elliptic Curve Based Protocol: With an Application to MixNets
• A Formal Treatment of Deterministic Wallets
• Lot49A lightweight protocol to incentivize mobile peer-to-peercommunication
• How to simultaneously exchange a secret bit by flipping a symmetrically-biased coin
• Revelio: A MimbleWimble Proof of Reserves Protocol
• Letting a Million Channels Bloom

InfoSec

• Firefox zero-day was used in attack against Coinbase employees, not its users
• Monero Disclosures
• Accidental Slashing
• 0x threw the emergency halt switch on the exchange

Pull Requests

Bitcoin Core review club

Bitcoin Core

• #15834: Fix transaction relay bugs introduced in #14897 and expire transactions from peer in-flight map
• #13756: wallet: “avoid_reuse” wallet flag for improved privacy
• #16171: Remove -mempoolreplacement to prevent needless block prop slowness.
• #15427: Add support for descriptors to utxoupdatepsbt
• #16257: abort when attempting to fund a transaction above -maxtxfee
• #15277: Enable building in Guix containers
• #16152: Disable bloom filtering by default
• #15681: Allow one extra single-ancestor transaction per package

BIPs

• #555: BIP 136: Bech32 Encoded Tx Position References
• Signet

lnd

• #3133: watchtower: integrate altruist watchtower and watchtower client
• #3134: Add gRPC performance Prometheus exporter
• #3143: htlcswitch: pipeline settles to switch
• #3197: Optimize prune zombie channels
• #3314: peer: don’t reply to requests for initial_graph_sync

c-lightning

• #2672: External wallet funding
• #2816: add signet support

BOLTs

• #607: BOLT01: TLV proposal

The month in Lapps

• lnd v0.7-beta
• lnd v0.7.1-beta-rc1
• clightning 0.7.1
• Zap 0.5.0 Release
• Zap 0.5.1 Release removes 0 amount invoices
• Lightning Labs mobile app now on mainnet
• Casa SatsApp
• lndmon

Misc.

• Bitcoin mining on an Apollo Guidance Computer: 10.3 seconds per hash
• P2P Protocol Based Crypto Asset Derivative Settled in Bitcoin on Discreet Log Contracts
• Liquid Swap Tool
• Chaumian CoinJoin implementation
• Erlay Overview
• What It’s Like to Review Bitcoin’s Code
• Brief History of Payment Channels
• Fanquake receives funding grant
• Chaincode Lightning Curriculum
• Chaincode Bitcoin Curriculum
• Chaincode Study Groups