Boltz suspends Bitcoin swap services amid AI-driven attacks

Boltz, the non‑custodial bridge that enables swaps between Bitcoin’s mainchain, the Lightning Network, and the Liquid sidechain, announced on August 3 that it is halting its swap service indefinitely. The decision follows months of AI‑assisted attacks that repeatedly exploited vulnerabilities faster than the small, bootstrapped team could patch. Because Boltz’s design keeps user funds under the users’ control, no assets were lost, but the company absorbed losses that strain its operating budget.

The shutdown directly affects wallets that relied on Boltz’s plumbing, such as Aqua and Bull Bitcoin, forcing users to seek alternative routes for cross‑layer transactions. Boltz’s API remains functional for processing cooperative refunds, and unilateral refund mechanisms are also available. The episode highlights a new threat vector for open‑source crypto projects, where publicly available code can be rapidly scanned and weaponized by AI, raising broader security concerns across the Bitcoin ecosystem.