This Week in Custody #46

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.

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Last Week’s Most Clicked

• a16z crypto’s primer on wallet security.

• Pine Street Labs fundraise and product announcements.

• Flashbots has a new MEV-boost Dashboard.

News

• Fidelity expected to support trading for Ethereum.

• BitGo launches its Developer Portal.

• BitGo launches a settlement network between exchanges.

• Aptos launches mainnet.

• MetaMask integrates with Sardine to enable a fiat on-ramp for US users.

• Elliptic says Chinese spies used Wasabi Wallet (coinjoin wallet) to pay Bitcoin bribes to a FBI agent.

Networks

• Cosmos launches “Game of Chains” program to build an incentivized testnet for interchain security.

• A Bitcoin transaction signed using FROST.

Guides

• Interesting talks from TabConf:

  • Moving Bitcoin Core off GitHub

  • P2P encryption for Bitcoin

  • Misconceptions about virtual bytes

• Block updates us on its Bitcoin hardware wallet design.

• SoK: Preventing Transaction Reordering Manipulations in Decentralized Finance

• Enter the Hydra: Towards Principled Bug Bounties and Exploit-Resistant Smart Contracts

• How-to: Make it Easy to Patch Crypto Networks reviews the deployments and release strategies for projects.

• Understanding “out-of-gas” denial with Gas Guage.

• Flood & Loot: A Systemic Attack On The Lightning Network

• A guide to Solana’s core concepts.

• What's the deal with zkapps?

Tools & Software

• CashApp launches deposits for its Lightning Network feature.

• BlockSec’s Phalcon tool gets a new update allowing users to simulate transactions at a specified block.

Cryptography

• KZG in Practice: Polynomial Commitment Schemes and Their Usage in Scaling Ethereum

Security

• Upcoming OpenSSL patch fixes a critical vulnerability.

• Analyzing the GitHub marketplace

• KataOS is a new operating system designed for securing embedded devices. It’s written mostly in Rust.

Thanks for reading! Have a great week.