mirror of
https://github.com/fluencelabs/js-libp2p
synced 2025-04-01 15:21:04 +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
88 lines
2.3 KiB
JavaScript
88 lines
2.3 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 WebSockets = require('libp2p-websockets')
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const { NOISE } = require('@chainsafe/libp2p-noise')
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const MPLEX = require('libp2p-mplex')
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const pipe = require('it-pipe')
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const createNode = async (transports, addresses = []) => {
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if (!Array.isArray(addresses)) {
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addresses = [addresses]
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}
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const node = await Libp2p.create({
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addresses: {
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listen: addresses
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},
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modules: {
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transport: transports,
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connEncryption: [NOISE],
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streamMuxer: [MPLEX]
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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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function printAddrs(node, number) {
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console.log('node %s is listening on:', number)
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node.multiaddrs.forEach((ma) => console.log(`${ma.toString()}/p2p/${node.peerId.toB58String()}`))
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}
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function print ({ 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(msg.toString())
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}
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}
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)
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}
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;(async () => {
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const [node1, node2, node3] = await Promise.all([
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createNode([TCP], '/ip4/0.0.0.0/tcp/0'),
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createNode([TCP, WebSockets], ['/ip4/0.0.0.0/tcp/0', '/ip4/127.0.0.1/tcp/10000/ws']),
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createNode([WebSockets], '/ip4/127.0.0.1/tcp/20000/ws')
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])
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printAddrs(node1, '1')
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printAddrs(node2, '2')
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printAddrs(node3, '3')
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node1.handle('/print', print)
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node2.handle('/print', print)
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node3.handle('/print', print)
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await node1.peerStore.addressBook.set(node2.peerId, node2.multiaddrs)
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await node2.peerStore.addressBook.set(node3.peerId, node3.multiaddrs)
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await node3.peerStore.addressBook.set(node1.peerId, node1.multiaddrs)
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// node 1 (TCP) dials to node 2 (TCP+WebSockets)
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const { stream } = await node1.dialProtocol(node2.peerId, '/print')
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await pipe(
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['node 1 dialed to node 2 successfully'],
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stream
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)
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// node 2 (TCP+WebSockets) dials to node 2 (WebSockets)
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const { stream: stream2 } = await node2.dialProtocol(node3.peerId, '/print')
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await pipe(
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['node 2 dialed to node 3 successfully'],
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stream2
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)
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// node 3 (listening WebSockets) can dial node 1 (TCP)
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try {
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await node3.dialProtocol(node1.peerId, '/print')
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} catch (/** @type {any} */ err) {
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console.log('node 3 failed to dial to node 1 with:', err.message)
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}
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})();
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