# Nostr Setup

This guide explains how SeedPass uses the Nostr protocol for encrypted vault backups and how to configure relays.

## Relay Configuration

SeedPass communicates with the Nostr network through a list of relays. You can manage these relays from the CLI:

```bash
seedpass nostr list-relays      # show configured relays
seedpass nostr add-relay <url>  # add a relay URL
seedpass nostr remove-relay <n> # remove relay by index
```

At least one relay is required for publishing and retrieving backups. Choose relays you trust to remain online and avoid those that charge high fees or aggressively rate‑limit connections.

## Manifest and Delta Events

Backups are published as parameterised replaceable events:

- **Kind 30070 – Manifest:** describes the snapshot and lists chunk IDs. The optional `delta_since` field stores the UNIX timestamp of the latest delta event.
- **Kind 30071 – Snapshot Chunk:** each 50 KB fragment of the compressed, encrypted vault.
- **Kind 30072 – Delta:** captures changes since the last snapshot.

When restoring, SeedPass downloads the most recent manifest and applies any newer delta events.

## Troubleshooting

- **No events found:** ensure the relays are reachable and that the correct fingerprint is selected.
- **Connection failures:** some relays only support WebSocket over TLS; verify you are using `wss://` URLs where required.
- **Stale data:** if deltas accumulate without a fresh snapshot, run `seedpass nostr sync` to publish an updated snapshot.

Increasing log verbosity with `--verbose` can also help diagnose relay or network issues.