Blockstream launches Swaps in beta to fill the gap Boltz left

The Blockstream Swaps service, which was announced as the solution to the Boltz-shaped hole that appeared in the Bitcoin ecosystem, arrives about one week after Boltz shut down its own swap service, citing headaches from waves of AI attacks.

Blockstream did not replace Boltz

An atomic swap is a trade where two parties exchange assets without any intermediary holding either side. The trade either clears in full or collapses and both parties keep what they started with.

Blockstream’s atomic swap version runs on the same primitive as Boltz’s while leaning on hashed time-locked contracts. However, the Adam Back-led firm went out of its way to clarify that it is “not seeking to replace any providers.” 

Rather, Blockstream Swaps was presented as “a much-needed addition to improve redundancy and resilience to the ecosystem.” 

The firm added that it was already developing Swaps before Boltz indefinitely suspended its own service. However, it admitted that the news triggered some sense of urgency within.

Blockstream Swaps closes the triangle between all three Bitcoin layers after adding mainchain Bitcoin to the Lightning-Liquid atomic swaps it shipped in December 2025. 

Blockstream already builds and maintains Liquid itself, the federated sidechain whose LBTC is a Bitcoin-pegged asset. 

Why did Boltz shut down? 

As reported in early August, Boltz blamed the indefinite suspension of its swap service to waves of AI-assisted breaches probing of its systems with growing regularity.

Throughout the rounds of exploits it endured, Boltz never lost any customer coins because it never held them in the first place. 

Contagion from the shutdown spread to wallets built on top of Boltz, including Bull Bitcoin and Aqua Wallet.

A cluster of Lightning outages, not a network failure

Boltz was not an isolated case. ZEUS pulled its infrastructure offline on August 5 after a contained security incident, the third prominent Lightning operator to suspend services inside roughly 72 hours. 

That timing rattled users, but the data points at the operators rather than the protocol. Analytics firm Amboss reported that during the week of the Boltz, Aqua and ZEUS disruptions, Lightning’s public capacity actually rose by 28 BTC and public channels grew by 256.

The backdrop is an industry-wide arms race. A16z crypto found an off-the-shelf AI agent’s success at exploiting known vulnerabilities jumped from 10% to 70% once it was handed structured attack knowledge, and more than 40 Bitcoin firms have since asked frontier AI labs for vetted defender access to the same models attackers already use.