Polar Wallet
Turn any USB or external drive into a secure Ethereum cold wallet
Demo
About
The goal of this project is to turn a USB drive—or any external storage device—into a cold wallet. When not in use, the device can be disconnected from the computer, keeping private keys completely offline. It works like a standard software wallet (e.g., MetaMask) but adds an extra layer of security
How it's made
This is a desktop application built with Tauri and Next.js. It uses Viem to interact with the Ethereum blockchain and ethers.js for private key management. For token swaps, it integrates with the Uniswap API. The architecture ensures that private keys are generated, stored, and signed locally on the device, never leaving the USB, combining usability with strong offline security