Thanks to our friends at Chaincode Labs for food and refreshments. If you can’t make it to the main event please join us at Westville Hudson around 9:30PM.

Discussion item

Can HTLCs work for micropayments?

Pull Requests

Bitcoin Core

• Refactor: separate wallet from node #10973.
• Add Poly1305 implementation #15519.
• gui: Generate bech32 addresses by default #15711.
• 0.18: Revert GetData randomization change (#14897) #15839. See also PR 14897.
• Enhance bumpfee to include inputs when targeting a feerate #15557.

BIPs

• BIP 127: Simple Proof-of-Reserves Transactions #756.

LND

• lnd 0.6 Release
• breacharbiter: watch for spends on all inputs until reaching terminal states #2765.
• lnd: lower default CLTV delta from 144 to 40 #2759.
• server: stagger initial reconnects #2885.

c-lightning

• invoice hook #2540. See also LND ‘HODL’ invoices.

The month in Lapps

• Block Clock - https://blockclock.live/
• Paywall any link - https://paywall.link/
• Edit Satoshi’s whitepaper - https://www.toshi.vision/
• Pay-per-hour Docker instance - https://lnsh.pw/
• Sats for Likes (or follows, or retweets) - https://kriptode.com/satsforlikes/index.html
• RUN LND shirts - http://runlnd.wbobeirne.com
• Lightning Loop Alpha - https://blog.lightning.engineering/posts/2019/03/20/loop.html

ML and Bitcoin Optech

• [bitcoin-dev] assumeutxo and UTXO snapshots
• [bitcoin-dev] Payjoin2swap: Enabling Payjoin Without Merchant Purchases
• Bitcoin Optech
  https://bitcoinops.org/en/newsletters/2019/03/19/
  https://bitcoinops.org/en/newsletters/2019/03/26/
  https://bitcoinops.org/en/newsletters/2019/04/02/
  https://bitcoinops.org/en/newsletters/2019/04/09/
  https://bitcoinops.org/en/newsletters/2019/04/16/
  

CVEs and Research

Research

• Transacting Bitcoin-based P2P Derivatives
• TEX - A Securely Scalable Trustless Exchange
• Flash Boys 2.0: Frontrunning, Transaction Reordering, and Consensus Instability in Decentralized Exchanges
• The Lightning Network (Part 2) – Routing Fee Economics

InfoSec

• ElectrumX server under DDOS attack
• Bitcoin SV 6 Block Reorg
• Ransom amounts rise 90% in Q1 as Ryuk increases