How It Works

Step 1: Create a Bundle

Select a set of UTXOs. These might represent different amounts or origins, that’s okay.

Step 2: Apply a Key Tweak

A cryptographic tweak modifies the spending keys tied to those UTXOs. This tweak creates a secret offset that only the sender and recipient know.

Step 3: Share the Tweak

The recipient receives the tweak (or its derived key) and now holds the exclusive ability to spend the bundle.

Step 4: Optional On-Chain Action

The bundle can sit untouched indefinitely or be spent on-chain later, using the tweaked key, fully compatible with Bitcoin's native rules.