A Nostr relay for Fenko Vault sync.

This server powers cross-device sync for Fenko Vault, a browser extension that keeps passkeys and 2FA codes in local storage. Vaults on the same sync chain exchange messages through this relay; everything is encrypted on your device before it gets here, so the relay only ever stores ciphertext.

Accepts

Only kind 30078 events (NIP-78 application data). Every other event kind is rejected — this is not a general-purpose relay.

Encryption

AES-256-GCM, end-to-end. Keys derive from your BIP-39 seed phrase and never leave your devices.

Accounts

None. No registration, no payment, no tracking.

Firewalls

To allow sync on restricted networks, whitelist vaultsync.fenko.nz on port 443 (WebSocket).

Software

nosflare v7.9.44 on Cloudflare Workers, speaking the Nostr protocol (NIP-01).

Source

The extension’s sync code is open at FenkoHQ/passkey-vault.