Flash meetup!

Payjoin boards are now available in Bark and enable a wallet app to receive a Payjoin and board onto Ark in the same transaction, saving the user fees and time. The same trick can also be used to on-ramp onto a Cashu mint running Bark, no channel management required. It may also be the first example of Transaction Cut-Through bitcoin has seen, a 13-year-old idea from Greg Maxwell!

More details on the blog: https://second.tech/blog/payjoin-boards-board-psbt/

It's hardening season. Bark 0.7.0 is all about improving security and reliability. There's nothing more important to be working on right now. Thanks to Project Loupe and Greg Sanders for the disclosures behind several fixes.

Full changelog: https://second.tech/docs/changelog

We've released Bark 0.6.2. You can now use one call to pay anything: an Ark or on-chain address, any Lightning destination, or a multi-rail BIP 321 URI, with a fee estimate for each option when there's more than one way to pay. Bark can also now cosign a Payjoin-funded board, enabling boards from external wallets and some interesting Cashu interop. And big thanks to the bitcoin Red Team and Project Loupe for the responsible disclosures behind several of this release's fixes.

Full changelog: https://second.tech/docs/changelog

Two Bark releases in two days...we hope you'll understand given the emerging security environment in bitcoin. 0.6.0 has some breaking changes you're going to want to pay attention to: it's required to continue support for refreshes and Lightning payments, so please get updated asap. We know this may be a disruptive update, so let us know if we can help. And thanks to Philipp Hoenisch of Lendasat for the report behind a fix.

Full changelog: https://second.tech/docs/changelog

Bark 0.5.0 is out, and it delivers one of our most requested features. A wallet's full off-chain balance can now be restored from its mnemonic alone, retrieved from the server. Lightning receives can now land on external Ark addresses, unlocking non-custodial Lightning address servers (thanks to Ben Carman for this work), and delegated refreshes can be scheduled ahead of time, when they're cheaper. Note that boarding now requires bark 0.5.0, so upgrade your clients to keep boarding.

Full changelog: https://second.tech/docs/changelog

Bark 0.4.0 is out, and receiving just got simpler: one BIP 321 payment request covers Ark, Lightning, and on-chain, built in a single barkd call or straight from the SDK. Also in this release: fee quotes for on-chain payments before you send, wallet notifications without a websocket, control over exactly which VTXOs a payment spends, and crash safety across every payment operation.

Full changelog: https://second.tech/docs/changelog

Bark added in the latest Alby Hub release. Possibly the simplest way to add self-custodial Lightning to all your NWC-connected apps.

Bark Wallet is now on the Umbrel app store. It's a simple, self-custodial bitcoin wallet covering the complete Bark experience: send and receive over Ark, Lightning, and on-chain, with automated refreshes, an emergency exit, and no channel and liquidity management.

It's also open source, a great foundation for your next wallet app project!

Learn more about what Bark Wallet can do and how it was built: https://blog.second.tech/bark-wallet-now-on-umbrel/

Bark went live with wallet apps ready to go on day one, built by bitcoiners who'd been working alongside us since long before launch.

Noah, from the team behind Blixt, is the Ark wallet you'd expect from self-custodial wallet veterans, including some fancy Ark-infused Lightning addresses for static, free, offline payments. iOS and Android.

Arké, from Christoph Ono, leverages years of the Bitcoin Design Community's open-source UX work, and pioneers brand-new UX for Ark. iOS only.

Both apps are open source and available today. Full write-up: https://blog.second.tech/introducing-noah-and-arke/