BITFLOPPY

// SIGNING WORKFLOW

From transaction to signed file.

BitFloppy uses files as the handoff between an online wallet application and an offline signing device. The process is intentionally linear and easy to inspect.

01

Prepare in Sparrow

Create a transaction in Sparrow Wallet and export it as a base64 PSBT. Review the recipient, amount, and fee before moving to the next step.

02

Move the PSBT

Connect BitFloppy as USB storage and create PSBT.txt containing the exported PSBT. Safely eject the drive when finished.

03

Restart and sign

Restart the board. BitFloppy processes the file and creates PSBT_signed.txt. Treat the device as sensitive while it is unlocked.

04

Import and finalize

Copy the signed PSBT back to Sparrow, inspect it again, and finalize or broadcast it from your connected computer.

For the exact Sparrow actions and supported address types, visit Sparrow integration. Reboot BitFloppy once more after signing to return it to locked mode.