Firefly
Self-hosted personal finance manager.
Open the official app on firefly-iii.org
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Run the open-source version on your own infrastructure.
What is Firefly?
Firefly is an open-source hardware wallet designed to securely store and manage digital assets, primarily cryptocurrencies. It provides users with a physical device to protect private keys, ensuring transactions are conducted offline and away from potential online threats. The project caters to cryptocurrency enthusiasts, developers, and individuals seeking a reliable, transparent method to safeguard their digital wealth. Firefly addresses the problem of centralized wallet vulnerabilities by offering a decentralized, tamper-resistant solution that emphasizes security and user control. Its open-source nature allows for community-driven development, enabling continuous improvements and audits. The Firefly hardware wallet, specifically the Firefly Pixie variant, is built around the ESP32-C3 microcontroller, featuring a 240x240 IPS display, four physical buttons, and a modular design for customization. Its open-source firmware and hardware schematics users to inspect, modify, and contribute to the project, fostering trust and transparency. By combining hardware security with open-source principles, Firefly aims to bridge the gap between accessibility and in cryptocurrency storage.
How it works
Firefly is an open-source hardware wallet designed to securely store and manage digital assets, such as cryptocurrencies. It serves as a physical device that stores private keys offline, preventing unauthorized access and mitigating risks associated with online wallets. The project's primary purpose is to provide users with a decentralized, tamper-resistant solution for managing digital assets. By leveraging hardware security and open-source transparency, Firefly individuals to maintain control over their funds without relying on third-party custodians. Firefly's hardware wallet features a 240x240 IPS display, four physical buttons, and a modular design for customization. It supports secure storage of private keys, offline transaction signing, and firmware updates via its open-source ecosystem. The ESP32-C3 microcontroller ensures low-power operation while maintaining cryptographic integrity.
How to use it
- 1Assemble the Firefly Pixie hardware using the provided PCB design and components. 2. Flash the firmware onto the ESP32-C3 microcontroller using the open-source development tools. 3. Connect the device to a computer via USB and use the REPL interface for diagnostics or provisioning. 4. Initialize the wallet by setting a PIN and confirming ownership through the physical buttons. Practical tips include verifying firmware authenticity through cryptographic signatures, using secure communication channels for updates, and storing backup recovery phrases in a physically secure location.
What it can do
- Finance
Use cases
Assumptions and limitations
Assumptions
- source: https://github.com/firefly
- license: AGPL-3.0 — free to use
- privacy: Opens an external demo
Limitations
- Limited hardware resources (e.g., 400KB RAM) may restrict advanced cryptographic operations
- Dependence on community-driven development could lead to slower feature adoption
- Physical device assembly requires technical expertise and soldering skills
- Open-source nature may expose potential vulnerabilities if not regularly audited
- Smaller screen size (240x240) may limit user interface complexity
Understanding the result
Self-hosted personal finance manager.
Tool details
- Clearly flagged when a network request is needed.
- No account, no sign-up, and no tracking of your content.
- Powered by firefly (MIT).
- Built with
- firefly (https://github.com/firefly)
- License
- MIT
- Runs locally
- No — requires a network request
- Verification
- Not yet verified
- Input
- Text
- Output
- Output
Built with https://github.com/firefly. OpenToolVault provides the discovery and browser interface while crediting the original project maintainers.
- Built with
- firefly
- License
- MIT
Open-source project
OpenToolVault is an independent directory. We are not affiliated with or endorsed by this project.
References
- /firefly — GitHub Repository
Upstream project · GitHub
- AGPL-3.0 License
Upstream project
Frequently asked
What is Firefly's primary use case?
Firefly is primarily used as a hardware wallet to securely store and manage digital assets like cryptocurrencies. It allows users to store private keys offline, sign transactions locally, and avoid online vulnerabilities. The open-source design also enables developers to audit and customize the wallet for specific needs.
How does Firefly ensure security?
Firefly secures digital assets through hardware isolation, cryptographic algorithms, and open-source transparency. The ESP32-C3 microcontroller handles cryptographic operations offline, while the firmware and hardware designs are publicly auditable. Physical buttons and a tamper-resistant PCB design further protect against unauthorized access.
How do I set up Firefly for the first time?
To set up Firefly, first assemble the hardware using the provided schematics. Flash the firmware via the development tools, then connect the device to a computer. Use the REPL interface to initialize the wallet by setting a PIN and confirming ownership with the physical buttons. Store your recovery phrase securely and avoid sharing it with anyone.
How does Firefly compare to alternatives like Ledger or Trezor?
Unlike Ledger or Trezor, Firefly is open-source and community-driven, allowing users to audit and modify its code. It uses the ESP32-C3 microcontroller, which is more cost-effective than the ARM-based chips in Ledger devices. However, Firefly lacks pre-built commercial support and may have a smaller ecosystem of apps and integrations compared to established hardware wallets.
What should I do if my Firefly device stops responding?
If your Firefly device is unresponsive, first check for firmware compatibility and ensure you're using the correct USB drivers. If the issue persists, try resetting the device via the hardware buttons or re-flashing the firmware. If problems continue, consult the community forum or GitHub repository for troubleshooting guidance and potential workarounds.