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@libp2p/peer-collections

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@libp2p/peer-collections

Stores values against a peer id

  • 6.0.10-a5cd8cfbe
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@libp2p/peer-collections

libp2p.io Discuss codecov CI

Stores values against a peer id

About

We can't use PeerIds as collection keys because collection keys are compared using same-value-zero equality, so this is just a group of collections that stringifies PeerIds before storing them.

PeerIds cache stringified versions of themselves so this should be a cheap operation.

Tracked versions are also available which report their current size to the libp2p Metrics collector.

Example - Peer lists

import { peerList } from '@libp2p/peer-collections'
import { peerIdFromPrivateKey } from '@libp2p/peer-id'
import { generateKeyPair } from '@libp2p/crypto/keys'

const peerId = peerIdFromPrivateKey(await generateKeyPair('Ed25519'))

const list = peerList()
list.push(peerId)

Example - Tracked peer lists

import { trackedPeerList } from '@libp2p/peer-collections'
import { peerIdFromPrivateKey } from '@libp2p/peer-id'
import { generateKeyPair } from '@libp2p/crypto/keys'
import { createLibp2p } from 'libp2p'

const libp2p = await createLibp2p()
const peerId = peerIdFromPrivateKey(await generateKeyPair('Ed25519'))

const list = trackedPeerList({ name: 'my_metric_name', metrics: libp2p.metrics })
list.push(peerId)

Example - Peer maps

import { peerMap } from '@libp2p/peer-collections'
import { peerIdFromPrivateKey } from '@libp2p/peer-id'
import { generateKeyPair } from '@libp2p/crypto/keys'

const peerId = peerIdFromPrivateKey(await generateKeyPair('Ed25519'))

const map = peerMap<string>()
map.set(peerId, 'value')

Example - Tracked peer maps

import { trackedPeerMap } from '@libp2p/peer-collections'
import { createLibp2p } from 'libp2p'
import { peerIdFromPrivateKey } from '@libp2p/peer-id'
import { generateKeyPair } from '@libp2p/crypto/keys'

const libp2p = await createLibp2p()
const peerId = peerIdFromPrivateKey(await generateKeyPair('Ed25519'))

const map = trackedPeerMap({ name: 'my_metric_name', metrics: libp2p.metrics })
map.set(peerId, 'value')

Example - Peer sets

import { peerSet } from '@libp2p/peer-collections'
import { peerIdFromPrivateKey } from '@libp2p/peer-id'
import { generateKeyPair } from '@libp2p/crypto/keys'

const peerId = peerIdFromPrivateKey(await generateKeyPair('Ed25519'))

const set = peerSet()
set.add(peerId)

Example - Tracked peer sets

import { trackedPeerSet } from '@libp2p/peer-collections'
import { createLibp2p } from 'libp2p'
import { peerIdFromPrivateKey } from '@libp2p/peer-id'
import { generateKeyPair } from '@libp2p/crypto/keys'

const libp2p = await createLibp2p()
const peerId = peerIdFromPrivateKey(await generateKeyPair('Ed25519'))

const set = trackedPeerSet({ name: 'my_metric_name', metrics: libp2p.metrics })
set.add(peerId)

Example - Peer filters

import { peerFilter } from '@libp2p/peer-collections'
import { peerIdFromPrivateKey } from '@libp2p/peer-id'
import { generateKeyPair } from '@libp2p/crypto/keys'

const peerId = peerIdFromPrivateKey(await generateKeyPair('Ed25519'))

const filter = peerFilter(1024)
filter.has(peerId) // false
filter.add(peerId)
filter.has(peerId) // true

Install

$ npm i @libp2p/peer-collections

Browser <script> tag

Loading this module through a script tag will make it's exports available as Libp2pPeerCollections in the global namespace.

<script src="https://unpkg.com/@libp2p/peer-collections/dist/index.min.js"></script>

API Docs

License

Licensed under either of

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.

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Package last updated on 28 Oct 2024

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