
Open-source Bitcoin hardware signing device built from off-the-shelf components, with QR air-gapped PSBT signing, temporary-seed mode, and optional smartcard protection.
Awaiting sources for: custody, platforms, lightning, availability.
Facts verified: Not yet verified
No evidence linked.
Layers Bitcoin L1 · Sidechains
Settle order · L1 → Lightning → Sidechains → Rollups → Meta → Off-chain
Same job · Wallets