Build the 2-of-3

You will type a few lines that are printed here. In Tails: top-left Applications menu → Terminal. You will see something like amnesia@amnesia:~$. The computer printed that. You type after it. Press Enter. Wait for that prompt to come back before the next line.

• Type the line exactly. Spaces count.
• Do not skip the ./ in front of Sparrow.
• Zero and the letter O are not the same. Lowercase L and the number 1 are not the same.
• If the next line is red or says “No such file”, stop. Do not invent a fix.
• Backspace is allowed. These lines cannot break Tails.

1. 01 · Boot Tails offline. Networking to Disabled. Start Tails.
2. 02 · Copy the archive from the data USB to the Desktop.
3. 03 · Open Terminal. Type these four lines, one at a time, Enter after each:

$ cd ~/Desktop
$ tar -xvf sparrowwallet-2.5.5-x86_64.tar.gz
$ cd Sparrow
$ ./bin/Sparrow

Wait 15–30 seconds. A Sparrow window should open. If it does, you are done with the terminal for this session.

You are not building the vault yet. You are copying one public key per boot. A public key is not the 24 words. It still shows the money later, so it goes on the data USB, not in a photo.

1. 01 · Boot with networking off. Launch Sparrow. File → New Wallet.
2. 02 · Multi Signature. Native Segwit. 2 of 3. This sets the path. It must read m/48'/0'/0'/2'. If it shows anything else, stop. Do not type a different path.
3. 03 · Keystore 1 → New or Imported Software Wallet. Enter the 24 words for this seed only. Confirm the path again.
4. 04 · On that keystore, export the xpub. Save it on the data USB as s1-xpub.txt, then s2, then s3. Do not Apply a finished wallet. Close Sparrow. Shut down. Wait for a dark screen.
5. 05 · Repeat for Seed 2. Then for Seed 3. Three boots. One seed each. Never continue from the previous boot.

1. 01 · Fresh Tails boot. Networking off. Launch Sparrow. Do not type a seed.
2. 02 · File → New Wallet. Multi-signature. Native Segwit. 2 of 3.
3. 03 · Import the three public keys from the data USB. Confirm the path still reads m/48'/0'/0'/2'.
4. 04 · Export the output descriptor to the data USB. This is the wallet map. It watches. It cannot spend. Shut down.
5. 05 · On the everyday computer, import that map into Sparrow as watch-only. This computer never holds a seed.
6. 06 · Still offline, on a later boot, open the same map in Electrum with one seed. The first addresses must match Sparrow. If they differ, stop.

1. 01 · Import the 2-of-3 wallet from the output descriptor, or restore one software keystore from one seed.
2. 02 · File → Open Transaction → From File → select the .psbt.
3. 03 · Read destination, amount, change, and fee against your written notes. Then Sign.
4. 04 · Export with a new filename such as tx-partial-s1.psbt. Close Sparrow. Shut Tails down fully.

• Keep networking disabled. If it is on, shut down and treat the session as burned.
• Load only one seed at a time. Seed 3 stays boxed unless Seed 1 or 2 is gone.
• Full shutdown before you carry the data USB back to the online computer.
• Do not unlock Persistent Storage on a spend. Restore the one seed into RAM, sign, and shut down. Do not let Electrum keep the wallet on the USB.
• Test the whole path with a small amount before savings touch this wallet.