Nostr Onchain
Nostr Onchain
Pocket Signer
A hardware signer for Nostr and Bitcoin that fits on a keychain. Reserve yours with an on-chain deposit — your shipping details travel as an end-to-end encrypted Nostr message. No account, no email, no database.
Deposit credited against the final price. Refundable until your unit ships — refund goes back to the address that paid.
Reserve yours
Login with your Nostr key
Your npub is your order ID. Sign in with a NIP-07 extension (Pocket Signer Link, Alby, nos2x…).
Shipping details
Encrypted to the store's key (NIP-44) — only the store can read them. They never touch a server; they live inside an encrypted Nostr event.
Pay the deposit on-chain
Send 21,000 sats to the store's taproot address. Pay from any wallet — or from your own npub's wallet in nostrtx so the payment itself proves it came from you.
Confirm your order
Signs an encrypted order event (shipping + payment txid) with your key and publishes it to relays. That signed event is your receipt — the store can't alter it, and you can prove exactly what you submitted.
FAQ
Why a deposit and not full payment?
Hardware timelines can slip. A small deposit reserves your unit and keeps the incentive honest on both sides; the balance is due when your unit ships.
Where do my shipping details go?
Into a NIP-44 encrypted Nostr event readable only by the store key. No server, no database to breach. Delete-after-ship is the policy.
Can I pay Lightning?
On-chain only for preorders — the payment doubles as your proof of reservation, anchored where nobody can rewrite it.
What exactly ships in November?
The Pocket Signer device (ESP32-S3, AMOLED touch screen, USB-C), flashed and ready: on-device BIP-340 signing, taproot PSBT review, NIP-46 bridge, SD-card air-gap mode. Firmware is open source.