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feat: async peerstore backed by datastores (#1058)

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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
This commit is contained in:
Alex Potsides
2022-01-20 12:03:35 +00:00
committed by GitHub
parent 0a4dc54d08
commit 978eb3676f
94 changed files with 3263 additions and 4039 deletions
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10
test/peer-store/peer-store.node.js
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@ -6,6 +6,7 @@ const sinon = require('sinon')
const baseOptions = require('../utils/base-options')
const peerUtils = require('../utils/creators/peer')
const all = require('it-all')
describe('libp2p.peerStore', () => {
let libp2p, remoteLibp2p
@ -35,13 +36,14 @@ describe('libp2p.peerStore', () => {
expect(spyAddressBook).to.have.property('called', true)
expect(spyKeyBook).to.have.property('called', true)
const localPeers = libp2p.peerStore.peers
expect(localPeers.size).to.equal(1)
const localPeers = await all(libp2p.peerStore.getPeers())
const publicKeyInLocalPeer = localPeers.get(remoteIdStr).id.pubKey
expect(localPeers.length).to.equal(1)
const publicKeyInLocalPeer = localPeers[0].id.pubKey
expect(publicKeyInLocalPeer.bytes).to.equalBytes(remoteLibp2p.peerId.pubKey.bytes)
const publicKeyInRemotePeer = remoteLibp2p.peerStore.keyBook.get(libp2p.peerId)
const publicKeyInRemotePeer = await remoteLibp2p.peerStore.keyBook.get(libp2p.peerId)
expect(publicKeyInRemotePeer).to.exist()
expect(publicKeyInRemotePeer.bytes).to.equalBytes(libp2p.peerId.pubKey.bytes)
})