⚠️ This repo was moved to https://github.com/ssbc/ssb-room-client. This archival will remain in this GitHub org ssb-ngi-pointer to demonstrate the outcome of the work done by the SSB NGI Pointer team during 2020 and 2021. The SSB NGI Pointer team is no longer active because we completed our grant project.

ssb-room-client

Plugin to accept interact with SSB room servers. This is supposed to be installed and used on apps that make remote calls to servers, thus clients.

Note, some rooms may have additional features such as Sign-in with SSB and HTTP invites, so it may be worth installing also ssb-http-auth-client and ssb-http-invite-client.

Installation

Prerequisites:

• Node.js 6.5.0 or higher
• Requires secret-stack@>=6.2.0
• Requires ssb-keys@>=8.1.0
• ssb-conn installed as a secret-stack plugin

npm install --save ssb-room-client

Require and use the following plugin into your ssb-server or secret-stack setup:

 SecretStack({appKey: require('ssb-caps').shs})
   .use(require('ssb-master'))
   .use(require('ssb-logging'))
   .use(require('ssb-conn'))
   .use(require('ssb-replicate'))
   .use(require('ssb-ebt'))
+  .use(require('ssb-room-client'))
   .use(require('ssb-friends'))
   .use(require('ssb-about'))
   .call(null, require('./config'));

Also, configure your ssb-config connections to allow incoming and outgoing tunnel connections. Both are necessary:

 connections: {
   incoming: {
     net: [{scope: 'private', transform: 'shs', port: NET_PORT}],
     bluetooth: [{scope: 'public', transform: 'shs'}],
+    tunnel: [{scope: 'public', transform: 'shs'}],
   },
   outgoing: {
     net: [{transform: 'shs'}],
     bluetooth: [{scope: 'public', transform: 'shs'}],
+    tunnel: [{transform: 'shs'}],
   },
 };

Usage

This library supports room2 features, alias registration and alias consumption, using the following muxrpc APIs:

ssb.roomClient.consumeAliasUri(uri, cb)

Connects to a member of the room known by the "alias" uri.

• uri is a string, either an HTTP URL or an SSB URI:
  • https://alice.room.com
  • ssb:experimental?action=consume-alias&roomId=R&userId=U&.......
• cb is called with the 2nd arg rpc (of the alias' peer) if succeeded

This API will:

1. Make an HTTP call on the room server
2. Establish a muxrpc connection with the room
3. Establish a muxrpc connection to the alias peer inside the room
4. Store metadata about the alias peer in ssb-conn DB, so that in the future we can reconnect to this alias peer

ssb.roomClient.registerAlias(roomId, alias, cb)

Registers an alias at the room server known by roomId

• roomId is the SSB ID of the room server where you want to register an alias
• alias is a string you want to be known by, e.g. "alice"
• cb will be called with 2nd arg as the confirmed alias URL if everything succeeded

ssb.roomClient.revokeAlias(roomId, alias, cb)

• roomId is the SSB ID of the room server where you want to revoke an alias
• alias is a string you want to remove, e.g. "Alice"
• cb will be called with 2nd arg true if everything succeeded

Utils and misc

Apart from that, you just use SSB CONN's APIs to connect with Rooms and the peers online in a Room.

There is one more muxrpc API, discoveredAttendants() which returns a pull-stream source of all room attendants discovered, but this API is sort of internal because ssb-conn's scheduler uses it and you shouldn't have to worry about using this API ever.

If an Open Room (has the same invite code for everyone) gives the user an invite code, then you can use the following utilities to extract the multiserver address of the Room:

const utils = require('ssb-room-client/utils');

/**
 * Returns a boolean indicating whether this
 * string is an invite code to some Room.
 */
utils.isOpenRoomInvite(str);

/**
 * Returns a multiserver address but
 * returns null if `str` is not an invite.
 */
utils.openRoomInviteToAddress(str);

/**
 * If `addr` refers to the multiserver address
 * for a Room server, then this returns an invite
 * code to that Room.
 */
utils.addressToOpenRoomInvite(addr);

For example, if you call utils.openRoomInviteToAddress(invite), you now have address, and you can call ssb.conn.connect(address, {type: 'room'}, cb).

Once the room is connected to, the ssb-room-client plugin will automatically stage the peers currently online in that Room, and then using ssb.conn.stagedPeers() you can read those peers and optionally connect to them using the address they announced. Read more about this in the docs for SSB CONN.

Rooms are not feeds to be followed. Although every room server has an SSB id, this is only used for encryption through secret-handshake, and does not represent a "feed" in any sense. Your app should not display room servers as accounts, users should not assign names or profile pictures, because the room never publishes anything on SSB. If accounts follow a room, this would only pollute the social graph with no benefit.

License

LGPL-3.0