Hyper-Nostr Relay

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• Sats: https://getalby.com/p/v_142857
• Ko-fi: https://ko-fi.com/v142857

Usage

The goal of this tool is to behave as a public relay; think of the chosen topic as a public relay, where you can send and receive notes from your peers!

1. Install: npm install -g hyper-nostr
2. Run: hyper-nostr [port [...starting topics]] (default 3000)
   • Example: hyper-nostr 3000 nostr
3. Add your relay as ws://localhost:[port]/[topic] in your Nostr client (I am using nostr as a topic to make some kind of generic swarm) (topic is now optional; if you left it blank, it goes to nostr)
4. Setup done!

HTTPS

The best way is to setup a reverse proxy. I use caddy, so then all I need to do is to run caddy reverse-proxy --to localhost:[port]. Then I can add wss://localhost as a relay.

Browsers have the tendency to refuse self signed certificates. A workaround is to go to the reverse-proxy link https://localhost and "accept the risk". There is no page in that path, so you will see a blank page, but after that your browser client probably will accept it.

How it works

Hyper-Nostr is a distributed nostr relay that syncs your relay storage and real time events through the Hyperswarm, linearizes the databases with Autobase, and uses a Hyperbeedee database (loosely based on MongoDB).

The hyperswarm and cores management was highly abstracted thanks to Hyper SDK.

NIPs implemented

• [x] NIP-01 (mandatory nostr implementation)
• [x] NIP-02 (contact lists)
• [ ] NIP-04 (direct messages)
• [x] NIP-09 (event deletion)
• [x] NIP-11 (relay information)
• [x] NIP-12 (generic tag queries)
• [x] NIP-16 (event treatment)
• [x] NIP-20 (command results)
• [x] NIP-33 (parametrized replaceable events)
• [x] NIP-45 (event counts)
• [ ] NIP-50 (search)

Code API

import * as SDK from 'hyper-sdk'
/** (sdk: SDK.SDK, topic: string) => swarm object */
import createSwarm from 'hyper-nostr'
import goodbye from 'graceful-goodbye'

const yourStorageFolder = '.hyper-nostr-relay' // set to false to not persist
const theTopic = 'nostr'

const sdk = SDK.create({
    storage: yourStorageFolder
})
goodbye(_ => sdk.close())

const { 
    subscriptions, // a Map<subscriptionId: string, { filters: Filter[], socket: WebSocket, receivedEvents: Set<id: Number> }> object
    sendEvent, // (event: Event) => document: Object | Error | void; to send an Nostr Event to the peers and the local database.
    queryEvents, // (filters: Filter[]) => Promise<Event[]>; to query the database for the events that match the list of filters 
    sendQueryToSubscription, // (sub: Subscription, key: subscriptionId, opts: { hasLimit: Boolean }) => Promise<void> // Write the events to the socket; internally includes each id on receivedEvents and dont send duplicated events
    update // () => Promise<void>; manually sync the databases in the background
} = await createSwarm(sdk, theTopic)

Server API

The client can send the following events through the websocket:

• REQ: Request and subscription event
  • Format: ["REQ", <subscription id>, <filters JSON>...]
  • The server then adds the socket and the filters to the subs map
  • The server will send all the events that are on the database that matches the query, followed by a ["EOSE", <subscription id>] event, signalling that all events from now on will be on real time
• EVENT: Send an event to the relay
  • Format: ["EVENT", <event JSON>]
  • The server will use sendEvent to broadcast the event, and received events through this broadcast are internally validated and sent through the subs Map
  • The server confirms that the message was sent with an ["OK", <event id>, true, ""] (NIP-20)
• CLOSE: Cancel a subscription
  • Format: ["CLOSE", <subscription id>]
  • Cancels a subscription, removing it from the subs map
• COUNT: Counts the number of events that match a query (NIP-45)
  • Format: ["COUNT", <subscription id>, <filters JSON>...]
  • Query and count events that match the filters sent in the same event

The server sends the following events:

• EOSE and OK specified above;
• EVENT: Sending an event that matches the filters of a subscription
  • Format: ["EVENT", <subscription id>, <event JSON>]
• NOTICE: Reporting errors
  • Format: ["NOTICE", <message>]
  • The only Notice this server implements is "Unrecognized event", for when there is no match for the event kind sent.

License

MIT