Noauth - Nostr key manager

Nsec.app is a web app to store your Nostr keys and provide remote access to keys using nip46.

Features:

• non-custodial store for your keys
• can store many keys
• provides nip46 access to apps
• permission management for connected apps
• works in any browser or platform
• background operation even if app tab is closed
• cloud e2ee sync for your keys
• support for OAuth-like signin flow

How it works

This is a web-based nostr signer app, it uses nip46 signer running inside a service worker, if SW is not running - a noauthd server sends a push message and wakes SW up. Also, keys can be saved to server and fetched later in an end-to-end encrypted way. Keys are encrypted with user-defined password, a good key derivation function is used to resist brute force.

It works across devices, but that's unreliable, especially if signer is on mobile - if your phone is locked then service worker might not wake up. Thanks to cloud sync/recovery of keys users can import their keys into this app on every device and then it works well.

How to self-host

This app is non-custodial, so there isn't much need for self-hosting. However, if you'd like to run your own version of it, here is how to do it:

Create web push keys (https://github.com/web-push-libs/web-push):

npm install web-push;
web-push generate-vapid-keys --json

Edit .end in noauth:

REACT_APP_WEB_PUSH_PUBKEY=web push public key, 
REACT_APP_NOAUTHD_URL=address of the noauthd server (see below)
REACT_APP_DOMAIN=domain name of your bunker (i.e. nsec.app)
REACT_APP_RELAY=relay that you'll use, can use wss://relay.nsec.app - don't use public general-purpose relays, you'll hit rate limits very fast

Then do:

npm install; 
npm run build; 

The app is in the build folder.

To run the noauthd server (https://github.com/nostrband/noauthd), edit .env in noauthd:

PUSH_PUBKEY=web push public key, same as above
PUSH_SECRET=web push private key that you generated above
ORIGIN=address of the server itself, like http://localhost:8000
DATABASE_URL="file:./prod.db"
BUNKER_NSEC=nsec of the bunker (needed for create_account methods)
BUNKER_RELAY="wss://relay.nsec.app" - same as above
BUNKER_DOMAIN="nsec.app" - same as above
BUNKER_ORIGIN=where noauth is hosted 

Then init the database and launch:

npx prisma migrate deploy
node -r dotenv/config src/index.js dotenv_config_path=.env

TODO

• Show details of requested operations
• Publish a profile for new sign ups
• Sync processed reqs across devices
• Sync connected apps and perms across devices
• Sync app activity across devices
• Group apps by domain
• Encrypt local nsec in Safari
• Add WebAuthn to the mix
• Add LN address to new profiles
• Confirm relay/contact list pruning requests
• Transfer/change nip05 name
• Better notifs with activity summaries
• How to send auth_url to new device if all other devices are down?