Starknet Bitcoin bridging goes dark after Atomiq security incident

If you wanted to move Bitcoin onto Starknet today, you’re out of luck. Atomiq, the infrastructure provider powering BTC-to-Starknet swaps, yanked all of its swap routes offline on August 20 after what it described as sophisticated AI-assisted security attacks targeting its operations.

The good news: no user funds were lost. The less good news: one of Starknet’s key Bitcoin on-ramps is now a dead end until a replacement integration goes live, which Starknet says should happen within days.

What happened and why funds are safe

Atomiq’s role in the Starknet ecosystem was straightforward but critical. It facilitated zero-slippage swaps between native BTC (including Lightning Network transactions) and Starknet-based assets like strkBTC.

Starknet moved quickly to clarify the damage, or rather the lack of it. The swaps relied on a trustless escrow model secured by Bitcoin’s proof-of-work consensus. In practical terms, that means the security of user funds didn’t depend on Atomiq staying online. The cryptographic guarantees were baked into the protocol layer, not the application layer.

Users who had swaps in progress aren’t stranded either. Atomiq’s web application remains accessible specifically so people can claim refunds on past transactions. The swap service is dead, but the refund counter is still open.

The replacement plan

Starknet confirmed it is actively preparing a new integration to restore Bitcoin bridging capabilities. The timeline is aggressive: days, not weeks or months.

Starknet has positioned itself as a privacy-focused Layer 2 built on zero-knowledge rollup technology, where Bitcoin holders can access DeFi applications with enhanced privacy guarantees. The new integration is expected to include enhancements over the previous Atomiq-powered system, including existing swap services such as zero-slippage Bitcoin transactions and support for the strkBTC token.