QR-Base Hardware Wallet

Build a truly usable Hardware Wallet for Under $20

Welcome to the QR-Base Hardware Wallet Project!
The goal of this project is to provide a low-cost, easy-to-build hardware wallet that uses QR codes for secure transactions. With price under $20, we aim to make secure digital asset management accessible to everyone.

Here is a video introducing how QR-Base Wallet interacts with MetaMask from AirGap Wallet.

Hardware Supported

The current development is based on the ESP32-S3 MCU, which has enough processing power to handle real-time QR code scanning, making it ideal for a QR-based wallet client.

• MCU

  MCU	Support	Test
  ESP32-S3	✅	✅
  ESP32-S2	✅

• Camera

  Camera	Support	Test
  OV2640	✅	✅
  OV3660	✅
  GC0308

• Screen

  Screen	Support	Test
  TBD

Project Progress

• Custom Bootloader

• Multi qr-code input

• Ethereum Support (EVM chains)

  • MetaMask Wallet
    • Legacy Transactions
    • Access List Transactions (EIP-2930)
    • Fee Market Transactions (EIP-1559)
    • Blob Transactions (EIP-4844)
  • AirGap Wallet
    • TBD

• Bitcoin Support

  • Bitcoin (SegWit)
    • AirGap Wallet
    • BlueWallet

How to Build

The project is developed using the VSCode IDE based on the ESP-IDF framework. Compiling the software is incredibly simple:

1. Install the ESP-IDF (Espressif IoT Development Framework).
2. Open the project in VSCode IDE.
3. Click the 'ESP-IDF: Build' button to compile the project.

Thanks

A huge thanks to the following open-source projects, which have been instrumental in the development of this project:

uBitcoin LVGL tinycbor airgap-vault KeystoneHQ esp32-camera esp-code-scanner bc-ur

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Feel free to contribute, open issues, and join the journey to make secure hardware wallets affordable for everyone!