mirror of
https://github.com/fluencelabs/js-libp2p
synced 2025-03-30 06:11:05 +00:00
f439d9b589
Updates all deps needed to support passing lists of byte arrays where they have been created from multiple input buffers. When reading multiplexed data, all messages arrive in length-prefixed buffers, which means the first few bytes tell the consumer how many bytes long next chunk will be. One length prefixed chunk can be delivered in several payloads from the underlying network transport. The first payload can also include the length prefix and some or all of the data, so we stitch these together in a `Uint8ArrayList` to avoid having to concatenate `Uint8Array`s together. Previously once we'd received enough bytes to satisfy the length prefix we'd concatenate the bytes together, but this is a potentially expensive operation where transports have small message sizes so instead just pass the `Uint8ArrayList` to the consumer and let them decide wether to concatenate or not as some consumers will be smart enough to operate on lists of `Uint8Array`s instead of always requiring a contiguous block of memory. BREAKING CHANGE: Streams are now `Duplex<Uint8ArrayList, Uint8ArrayList | Uint8Array>`
53 lines
1.5 KiB
JavaScript
53 lines
1.5 KiB
JavaScript
/* eslint no-console: ["off"] */
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import { generateKey } from 'libp2p/pnet'
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import { privateLibp2pNode } from './libp2p-node.js'
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import { pipe } from 'it-pipe'
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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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// Create a Uint8Array and write the swarm key to it
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const swarmKey = new Uint8Array(95)
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generateKey(swarmKey)
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// This key is for testing a different key not working
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const otherSwarmKey = new Uint8Array(95)
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generateKey(otherSwarmKey)
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;(async () => {
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const node1 = await privateLibp2pNode(swarmKey)
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// TASK: switch the commented out line below so we're using a different key, to see the nodes fail to connect
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const node2 = await privateLibp2pNode(swarmKey)
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// const node2 = await privateLibp2pNode(otherSwarmKey)
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await Promise.all([
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node1.start(),
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node2.start()
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])
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console.log('nodes started...')
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// Add node 2 data to node1's 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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node2.handle('/private', ({ stream }) => {
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pipe(
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stream,
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async function (source) {
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for await (const msg of source) {
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console.log(uint8ArrayToString(msg.subarray()))
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}
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}
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)
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})
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const stream = await node1.dialProtocol(node2.peerId, '/private')
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await pipe(
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[uint8ArrayFromString('This message is sent on a private network')],
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stream
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)
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})()
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