Package relay enables multiple transactions to be packaged, broadcast, and relayed together, and is a huge improvement for layer twos like Lightning and Ark.

We’ve made arkoor the standard for payments on our Ark implementation. Instead of offering users the option of making either out-of-round (arkoor) or in-round payments, all payments will be arkoor...

Ark is live on signet, and we're inviting developers to test, explore, and break things. We've set up a faucet and a test store to get you going.

CEO Steven Roose gave a comprehensive update on the state of the Ark protocol on the Stephan Livera Podcast, so we're sharing the transcript here for those that prefer those! Stephan: Hi everyone,...

Last weekend at OP_NEXT, we unveiled Erk—a novel variation of the Ark protocol that completely removes the need for user interactivity in rounds. This addresses one of Ark's key limitations: the re...

We simulated bitcoin users sending Lightning payments to work out Ark's liquidity requirements, and compared an Ark server's capital needs to an LSP's.

As we continue the study of Ark’s liquidity requirements, we must come to an understanding on how to price liquidity. Many user operations on Ark require an Ark server to lock up bitcoin (e.g., ref...

As we continue developing the Ark protocol, understanding liquidity costs has become essential. Our previous research into bitcoin yield products revealed that Lightning liquidity leasing offers so...

We're funding a year-long grant for Beulah Evanjalin to implement nested MuSig in libsecp256k1-zkp. This is a joint effort between Beulah, Second, and Vora, with Jesse Posner providing weekly mento...

We've redesigned how Bark wallets receive updates from the Ark server. The new unified mailbox gives developers a single, efficient feed for all wallet notifications—Lightning payments, Ark payment...

hArk (hash-lock Ark), first described in a Delving Bitcoin post, and shipped in v0.1.0-beta.6 is an update to our implementation of the Ark protocol that fundamentally changes how rounds are constr...

Ark users are always in control of their bitcoin. They can perform an emergency exit to get back on-chain whenever they need to. But Bark is a client-server system, and users depend on the server t...

Barkd is what you run when you want to enable bitcoin payments server-side. It's our reference daemon wallet: a single binary that runs alongside your other services and exposes a REST API for send...

Bark is live on bitcoin mainnet. Anyone can now connect to Second's Ark server and start making self-custodial payments over Ark, Lightning, and on-chain.

We're immensely fortunate and grateful to have had the support of great bitcoin builders even before we launched. They've been building wallet apps alongside our work on the Bark SDK, providing fe...

Bark Wallet hit the Umbrel app store on the same day as our mainnet launch. A number of adventurous users have already installed it and started making payments, and with everything running smoothl...

Alby Hub lets you connect all your wallet apps to a single payment backend. It takes care of most wallet operations for you, but managing the Lightning node behind it can still be a challenge. Tha...

Up until now, wallet apps built on Bark didn’t handle their own Lightning pathfinding. Instead, the wallet app would send the BOLT11 invoice, amount, and destination to the Ark server, which would...

Bark Wallet is now available on StartOS, and this build ships with something special: continuous encrypted backups...

Markets, monetary policy rules, and three Fed governors all pointed toward another rate increase. The committee chose to wait instead.

O que podemos esperar das transformações tecnológicas e comportamentais? Participe da 220ª Live de 5ª (em plena quinta-feira!). Dia 30/07/26 às 20h00.

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