Recovery Drills 101

A backup is not a backup until you have successfully restored it. If you have a steel plate locked in a safe but have never proven it works, you don't have security—you have hope.

Hardware wallets fail. Firmware updates brick devices. PINs get forgotten. You must train for the day your primary device dies. This guide outlines the mandatory "Nuke and Restore" drill every self-custodian must master.

The Golden Rule of Digital Hygiene: During a recovery drill, you will be handling your raw seed phrase. Never expose it to an internet-connected device, a hot operating system, or take a photo of it. You may only type your seed words into a computer keyboard if you are running a strictly airgapped, stateless environment (like a bootable USB live OS) using dedicated offline tools. If you are not operating in a guaranteed offline and amnesic environment, you must only input these words using the physical buttons on your hardware wallet.

Phase I: The Pre-Flight Check

Before you intentionally wipe your device, you must securely document your wallet's current state. If you wipe the device without knowing exactly what to look for when you restore it, you will have no way to verify success.

  1. Connect Your Coordinator: Open Sparrow Wallet (or your preferred coordinator) and connect your hardware device.
  2. Document the Master Fingerprint: Every seed phrase generates a unique 8-character Master Fingerprint (e.g., 7a3b9c12). Write this down on a temporary piece of scrap paper.
  3. Document the First Receiving Address: Navigate to the "Receive" tab in your coordinator. Note down the very first receiving address at index 0 (it will likely start with bc1q...). Write down the first and last 6 characters.
  4. Document the Derivation Path: Ensure you know the path your wallet uses (usually m/84'/0'/0' for Native SegWit).

Phase II: Nuke and Restore

This is where you simulate a catastrophic hardware failure and prove your recovery process works.

  1. Factory Reset: Navigate to your hardware wallet's settings and execute a factory reset. The device will wipe its memory completely. It now knows nothing about your Bitcoin.
  2. Retrieve Your Backup: Fetch your physical steel or paper backup from its secure location.
  3. Initiate Recovery: Here you have two paths. You can restore directly on your freshly wiped hardware device, or you can use our offline, airgapped tools to safely derive and verify your wallet data before provisioning a device.
  4. Input the Entropy: Carefully enter your 12 or 24 words. If using our stateless live OS tools, you may safely use your keyboard. If recovering directly to a hardware wallet, use the device's physical buttons. Take your time—a single wrong letter can result in an invalid checksum.
  5. Apply the Passphrase (If Applicable): If you use a BIP-39 passphrase (the "25th word"), you must enter it perfectly now. Remember, passphrases are case-sensitive and space-sensitive.

Phase III: The Moment of Truth

Your wallet is now restored or mathematically derived offline, but the drill isn't over until you verify the cryptography matches your pre-flight check.

  1. Check the Fingerprint: Look at the device screen, your offline tool output, or reconnect to your coordinator. Does the new Master Fingerprint match the one you wrote down in Phase I? If yes, your 12/24 words are perfect.
  2. Check the Address: Does the first receiving address exactly match the bc1q... address you wrote down earlier? If yes, your derivation path and passphrase are perfect.

Drill Complete: If the Master Fingerprint and the Receiving Address match perfectly, you have successfully proven your sovereignty. You can confidently rely on your physical backup. Destroy the temporary scrap paper used in Phase I.

Advanced Considerations

BIP-85 Derived Seeds

If you are acting as the "Uncle Jim" of your family—using your main hardware wallet or offline setup to securely generate deterministic BIP-85 child seeds for friends or relatives—a successful recovery drill of your master seed is exponentially more important. Because BIP-85 derivation is purely mathematical, successfully restoring your master seed guarantees the immediate, fully intact recovery of every single child seed you have ever generated.

Frequency of Drills

How often should you run a Nuke and Restore drill?