Blockstream Jade Open-source hardware wallet by Blockstream. Designed for flexible operation : offline (airgapped) or online (with Pinserver). Hardware - Color display. - Two buttons. - USB-C. - Camera (for QR scanning). - microSD slot. - ESP32 microcontroller (no Secure Element). Modes Offline (BCUR) - QR-based airgap via "Animated QR" (BCUR encoding). - Device camera reads, display shows signed result. - Compatible with Sparrow, Specter, BlueWallet (offline mode). Online (Pinserver) - Device communicates with Pinserver (Blockstream-hosted) for PIN protection. - "Blind oracle" — Pinserver do…