MARA Slipstream Launches as Permissionless Service Bypassing Public Mempool

MARA's Slipstream now operates as a free, permissionless service submitting Bitcoin transactions directly to miners. This bypasses the public mempool, mitigating risks for COLDCARD wallet users facing pre-computed key attacks.

Woofun AI reports that MARA has launched Slipstream as a permissionless public service that requires no client software. The system submits Bitcoin transactions directly to miners, keeping them out of the public mempool until mined. This mechanism addresses vulnerabilities for users transferring funds from COLDCARD wallets, where multi-signature spending exposes public keys. Attackers can match these keys against pre-computed databases of weak private keys and broadcast higher-fee double-spend transactions before confirmation. MARA recommends using conservative fees to prevent transactions from getting stuck. Aside from standard Bitcoin network fees, the service is currently free.