mirror of
https://github.com/fluencelabs/js-libp2p
synced 2025-03-30 14:21:04 +00:00
5397137c65
Instead of making the `.dht` and `.pubsub` properties optional, use dummy implementations that throw exceptions if they are not configured. This way we don't have to null guard everywhere they are accessed.
54 lines
1.5 KiB
JavaScript
54 lines
1.5 KiB
JavaScript
/* eslint-disable no-console */
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import { createLibp2p } from 'libp2p'
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import { TCP } from '@libp2p/tcp'
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import { Mplex } from '@libp2p/mplex'
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import { Noise } from '@chainsafe/libp2p-noise'
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import { FloodSub } from '@libp2p/floodsub'
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import { fromString as uint8ArrayFromString } from 'uint8arrays/from-string'
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import { toString as uint8ArrayToString } from 'uint8arrays/to-string'
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const createNode = async () => {
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const node = await createLibp2p({
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addresses: {
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listen: ['/ip4/0.0.0.0/tcp/0']
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},
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transports: [new TCP()],
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streamMuxers: [new Mplex()],
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connectionEncryption: [new Noise()],
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pubsub: new FloodSub()
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})
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await node.start()
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return node
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}
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;(async () => {
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const topic = 'news'
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const [node1, node2] = await Promise.all([
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createNode(),
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createNode()
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])
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// Add node's 2 data to the PeerStore
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await node1.peerStore.addressBook.set(node2.peerId, node2.getMultiaddrs())
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await node1.dial(node2.peerId)
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node1.pubsub.subscribe(topic)
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node1.pubsub.addEventListener('message', (evt) => {
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console.log(`node1 received: ${uint8ArrayToString(evt.detail.data)} on topic ${evt.detail.topic}`)
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})
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// Will not receive own published messages by default
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node2.pubsub.subscribe(topic)
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node2.pubsub.addEventListener('message', (evt) => {
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console.log(`node2 received: ${uint8ArrayToString(evt.detail.data)} on topic ${evt.detail.topic}`)
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})
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// node2 publishes "news" every second
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setInterval(() => {
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node2.pubsub.publish(topic, uint8ArrayFromString('Bird bird bird, bird is the word!'))
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}, 1000)
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})()
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