This Week in Custody

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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• Abra’s is now an approved RIA. This excellent podcast episode explains Abra’s separately managed account (SMA) model.

• Kraken launches a self-custodial mobile wallet. They published an overview of mobile wallet security challenges.

• Wasabi Wallet blocks US users.

• Samourai Wallet founders charged.

• LocalMonero shutting down.

• Coinbase adds support for Lightning Network.

• Lots of acquisitions:

  • Phantom buys Bitski.

  • Jupiter (Solana) buys Ultimate Wallet.

  • Safe buys Multis.

• Uniswap supports Robinhood Connect. Also, the number of Uniswap wallets double.

• FalconX launches Prime Connect - a DMA & custody solution.

• Ledger partners with MoonPay.

• Stripe enters crypto stablecoin business again.

• Worldcoin wallet has 10M users.

• Tholos launches an MPC wallet targeting the middle market.

• Overview of NEAR’s Chain Signatures (chain abstraction).

• Coinbase Venture covers the EigenLayer AVS ecosystem.

• Blog post on the business of tradfi wallets.

• Coinbase shares a Solidity style guide.

• Zellic publishes a primer and introductory posts on MPC wallets.

• Bastion writes about the costs of money transmitter licenses & compliance. They calculate that compliance adds an additional $0.10 per transaction as an on-going expense.

• Bitcoin multi-sig hardware performance report from Casa.

• Sponsored transactions using advertisements on Sui.

• Runes launched on Bitcoin. Magic Eden adds support.

• MetaMask launches smart transactions to help reduce predatory MEV.

• Build provenance for Homebrew.

• Chivo Wallet (El Salvador’s wallet) leaks PII. Also, source code is leaked.

• Timeline of the xz attack.

Thanks for reading!