This Week in Custody #20
This Week in Custody is a newsletter covering technical and narrative developments in digital asset custody written for wallet engineers, digital asset operators, and security engineers.
News
Bitcoin Legal Defense Fund. [Link]
BitMEX buys a bank. [Link]
Crypto.com users suffer from a hack. [Link]
Bitcoin
A breakdown of different output types and their address formats. [Link]
A single transaction creating 50 Lightning Network channels for $2. [Link]
Bitcoin-dev Blog publishes Schnorr basics. [Link]
BIP85 Deterministic Entropy informational website. [Link]
Probing-focused Lightning Network simulator. [Link]
How to claim the 1BTC “Stable Channel” Bounty from HRF and Strike. [Link]
Two new bLIPs (Bitcoin Lightning Improvement Proposals) merged. [Link]
New interactive website visualizes miniscript policies. [Link]
How to review a Bitcoin Core pull request. [Link]
Ethereum
A Survey of Non-Custodial Wallet Functionalities. [Link]
Upgrading Ethereum: A technical handbook on Ethereum's move to proof of stake and beyond. [Link]
21 Etherscan Features in 2021. [Link]
Introducing Plonky2. [Link]
Arbitrum’s Sequencer goes down due to hardware failure. [Link]
Binance adds support for Arbitrum withdrawals. [Link]
Adding a “Seatbelt” to secure governance proposals. [Link]
Other Chains
How to Audit Solana Smart Contracts in one tweet thread. [Link]
WTF is Data Availability? [Link]
StarkNet Cairo 101. [Link]
Goki releases a wallet connector for Solana apps. [Link]
Crypto
An extremely casual code review of MetaMask’s crypto. [Link]
Extracting the Private Key from Schnorr Signatures that reuse a Nonce. [Link]
MuSig2: Multisig with Schnorr. [Link]
Security
SlowMist reviews the blockchain security industry in 2021. [Link]
Debian’s approach to Rust - Dependency handling. [Link]
Dumping Firmware With a 555. [Link]
Bootguard and PSB have user-hostile defaults. [Link]
Thanks for reading! Have a great week.