mirror of
https://github.com/fluencelabs/js-libp2p
synced 2025-03-30 14:21:04 +00:00
978eb3676f
We have a peerstore that keeps all data for all observed peers in memory with no eviction. This is fine when you don't discover many peers but when using the DHT you encounter a significant number of peers so our peer storage grows and grows over time. We have a persistent peer store, but it just periodically writes peers into the datastore to be read at startup, still keeping them in memory. It also means a restart doesn't give you any temporary reprieve from the memory leak as the previously observed peer data is read into memory at startup. This change refactors the peerstore to use a datastore by default, reading and writing peer info as it arrives. It can be configured with a MemoryDatastore if desired. It was necessary to change the peerstore and *book interfaces to be asynchronous since the datastore api is asynchronous. BREAKING CHANGE: `libp2p.handle`, `libp2p.registrar.register` and the peerstore methods have become async
57 lines
1.5 KiB
JavaScript
57 lines
1.5 KiB
JavaScript
/* eslint-disable no-console */
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'use strict'
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const Libp2p = require('../../')
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const TCP = require('libp2p-tcp')
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const Mplex = require('libp2p-mplex')
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const { NOISE } = require('@chainsafe/libp2p-noise')
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const Gossipsub = require('@achingbrain/libp2p-gossipsub')
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const { fromString: uint8ArrayFromString } = require('uint8arrays/from-string')
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const { toString: uint8ArrayToString } = require('uint8arrays/to-string')
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const createNode = async () => {
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const node = await Libp2p.create({
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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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modules: {
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transport: [TCP],
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streamMuxer: [Mplex],
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connEncryption: [NOISE],
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pubsub: Gossipsub
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}
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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.multiaddrs)
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await node1.dial(node2.peerId)
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node1.pubsub.on(topic, (msg) => {
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console.log(`node1 received: ${uint8ArrayToString(msg.data)}`)
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})
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node1.pubsub.subscribe(topic)
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// Will not receive own published messages by default
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node2.pubsub.on(topic, (msg) => {
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console.log(`node2 received: ${uint8ArrayToString(msg.data)}`)
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})
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node2.pubsub.subscribe(topic)
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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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