bitspace-client

Standalone BitSpace RPC client

npm install bitspace-client

Usage

const BitspaceClient = require('bitspace-client')

const client = new BitspaceClient() // connect to the Bitspace server

const chainstore = client.chainstore() // make a chainstore

const feed = chainstore.get(someUnichainKey) // make a unichain

await feed.get(42) // get some data from the unichain

API

const client = new BitspaceClient([options])

Make a new Bitspace RPC client. Options include:

{
  host: 'bitspace', // the ipc name of the running server
                      // defaults to bitspace
  port                // a TCP port to connect to
}

If port is specified, or host and port are both specified, then the client will attempt to connect over TCP.

If you only provide a host option, then it will be considered a Unix socket name.

await BitspaceClient.serverReady([host])

Static method to wait for the local IPC server to be up and running.

status = await client.status([callback])

Get status of the local daemon. Includes stuff like API version etc.

await client.close([callback])

Fully close the client. Cancels all inflight requests.

await client.ready([callback])

Wait for the client to have fully connected and loaded initial data.

chainstore = client.chainstore([namespace])

Make a new remote chainstore. Optionally you can pass a specific namespace to load a specific chainstore. If you do not pass a namespace a random one is generated for you.

client.network

The remote chainstore network instance.

client.replicate(chain)

A one-line replication function for `Remote (see below for details).

Remote Chainstore

The remote chainstore instances has an API that mimicks the normal chainstore API.

feed = chainstore.get([key])

Make a new remote unichain instance. If you pass a key that specific feed is loaded, if not a new one is made.

feed = chainstore.default()

Get the "default" feed for this chainstore, which is derived from the namespace.

feed.name

The name (namespace) of this chainstore.

async feed.close([callback])

Close the chainstore. Closes all feeds made in this chainstore.

Remote Networker

The remote networker instance has an API that mimicks the normal chainstore networker API.

await network.ready([callback])

Make sure all the peer state is loaded locally. client.ready calls this for you. Note you do not have to call this before using any of the apis, this just makes sure network.peers is populated.

networks.peers

A list of peers we are connected to.

network.on('peer-add', peer)

Emitted when a peer is added.

network.on('peer-remove', peer)

Emitted when a peer is removed.

await network.configure(discoveryKey | RemoteUnichain, options)

Configure the network for this specific discovery key or RemoteUnichain. Options include:

{
  lookup: true, // should we find peers?
  announce: true, // should we announce ourself as a peer?
  flush: true // wait for the full swarm flush before returning?
  remember: false // persist this configuration so it stays around after we close our session?
}

const ext = network.registerExtension(name, { encoding, onmessage, onerror })

Register a network protocol extension.

Remote Feed

The remote feed instances has an API that mimicks the normal Unichain API.

feed.key

The feed public key

feed.discoveryKey

The feed discovery key.

feed.writable

Boolean indicating if this feed is writable.

await feed.ready([callback])

Wait for the key, discoveryKey, writability, initial peers to be loaded.

const block = await feed.get(index, [options], [callback])

Get a block of data from the feed.

Options include:

{
  ifAvailable: true,
  wait: false,
  onwait () { ... }
}

See the Unichain docs for more info on these options.

Note if you don't await the promise straight away you can use it to to cancel the operation, later using feed.cancel

const p = feed.get(42)
// ... cancel the get
feed.cancel(p)
await p // Was cancelled

feed.cancel(p)

Cancel a get

await feed.has(index, [callback])

Check if the feed has a specific block

await feed.download(start, end, [callback])

Select a range to be downloaded. Similarly to feed.get you can use the promise itself to cancel a download using feed.undownload(p)

feed.undownload(p)

Stop downloading a range.

await feed.update([options], [callback])

Fetch an update for the feed.

Options include:

{
  minLength: ..., // some min length to update to
  ifAvailable: true,
  hash: true
}

See the Unichain docs for more info on these options.

await feed.append(blockOrArrayOfBlocks, [callback])

Append a block or array of blocks to the unichain

feed.peers

A list of peers this feed is connected to.

feed.on('peer-add', peer)

Emitted when a peer is added.

feed.on('peer-remove', peer)

Emitted when a peer is removed.

feed.on('append')

Emitted when the feed is appended to, either locally or remotely.

feed.on('download', seq, data)

Emitted when a block is downloaded. data is a pseudo-buffer with {length, byteLength} but no buffer content.

feed.on('upload', seq, data)

Emitted when a block is uploaded. data is a pseudo-buffer with {length, byteLength} but no buffer content.

Replicator

Bitspace also includes a simple replication function for RemoteUnichains that does two things:

1. It first configures the network (client.network.configure(chain, { announce: true, lookup: true }))
2. Then it does a chain.update({ ifAvailable: true }) to try to fetch the latest length from the network.

This saves a bit of time when swarming a RemoteUnichain.

await replicate(chain)

Quickly connect a RemoteUnichain to the BitSwarm network.

License

MIT