mirror of
https://github.com/fluencelabs/js-libp2p
synced 2025-03-30 22:31:03 +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
60 lines
1.4 KiB
JavaScript
60 lines
1.4 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 { 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 concat = require('it-concat')
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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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// To signal the addresses we want to be available, we use
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// the multiaddr format, a self describable address
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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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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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;(async () => {
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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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printAddrs(node1, '1')
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printAddrs(node2, '2')
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node2.handle('/print', async ({ stream }) => {
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const result = await pipe(
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stream,
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concat
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)
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console.log(result.toString())
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})
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await node1.peerStore.addressBook.set(node2.peerId, node2.multiaddrs)
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const { stream } = await node1.dialProtocol(node2.peerId, '/print')
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await pipe(
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['Hello', ' ', 'p2p', ' ', 'world', '!'],
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stream
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)
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})();
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