-
Notifications
You must be signed in to change notification settings - Fork 442
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
feat: discover and connect to closest peers (#798)
- Loading branch information
1 parent
4ebcdb0
commit baedf3f
Showing
7 changed files
with
401 additions
and
27 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,40 +1,126 @@ | ||
| 'use strict' | ||
|
|
||
| const errCode = require('err-code') | ||
| const debug = require('debug') | ||
| const log = debug('libp2p:peer-routing') | ||
| log.error = debug('libp2p:peer-routing:error') | ||
|
|
||
| const all = require('it-all') | ||
| const pAny = require('p-any') | ||
| const { | ||
| setDelayedInterval, | ||
| clearDelayedInterval | ||
| } = require('set-delayed-interval') | ||
|
|
||
| /** | ||
| * Responsible for managing the usage of the available Peer Routing modules. | ||
| */ | ||
| class PeerRouting { | ||
| /** | ||
| * @class | ||
| * @param {Libp2p} libp2p | ||
| */ | ||
| constructor (libp2p) { | ||
| this._peerId = libp2p.peerId | ||
| this._peerStore = libp2p.peerStore | ||
| this._routers = libp2p._modules.peerRouting || [] | ||
|
|
||
| // If we have the dht, make it first | ||
| if (libp2p._dht) { | ||
| this._routers.unshift(libp2p._dht) | ||
| } | ||
|
|
||
| this._refreshManagerOptions = libp2p._options.peerRouting.refreshManager | ||
|
|
||
| this._findClosestPeersTask = this._findClosestPeersTask.bind(this) | ||
| } | ||
|
|
||
| /** | ||
| * Start peer routing service. | ||
| */ | ||
| start () { | ||
| if (!this._routers.length || this._timeoutId || !this._refreshManagerOptions.enabled) { | ||
| return | ||
| } | ||
|
|
||
| this._timeoutId = setDelayedInterval( | ||
| this._findClosestPeersTask, this._refreshManagerOptions.interval, this._refreshManagerOptions.bootDelay | ||
| ) | ||
| } | ||
|
|
||
| module.exports = (node) => { | ||
| const routers = node._modules.peerRouting || [] | ||
| /** | ||
| * Recurrent task to find closest peers and add their addresses to the Address Book. | ||
| */ | ||
| async _findClosestPeersTask () { | ||
| try { | ||
| for await (const { id, multiaddrs } of this.getClosestPeers(this._peerId.id)) { | ||
| this._peerStore.addressBook.add(id, multiaddrs) | ||
| } | ||
| } catch (err) { | ||
| log.error(err) | ||
| } | ||
| } | ||
|
|
||
| // If we have the dht, make it first | ||
| if (node._dht) { | ||
| routers.unshift(node._dht) | ||
| /** | ||
| * Stop peer routing service. | ||
| */ | ||
| stop () { | ||
| clearDelayedInterval(this._timeoutId) | ||
| } | ||
|
|
||
| return { | ||
| /** | ||
| * Iterates over all peer routers in series to find the given peer. | ||
| * | ||
| * @param {string} id - The id of the peer to find | ||
| * @param {object} [options] | ||
| * @param {number} [options.timeout] - How long the query should run | ||
| * @returns {Promise<{ id: PeerId, multiaddrs: Multiaddr[] }>} | ||
| */ | ||
| findPeer: async (id, options) => { // eslint-disable-line require-await | ||
| if (!routers.length) { | ||
| throw errCode(new Error('No peer routers available'), 'NO_ROUTERS_AVAILABLE') | ||
| /** | ||
| * Iterates over all peer routers in series to find the given peer. | ||
| * | ||
| * @param {string} id - The id of the peer to find | ||
| * @param {object} [options] | ||
| * @param {number} [options.timeout] - How long the query should run | ||
| * @returns {Promise<{ id: PeerId, multiaddrs: Multiaddr[] }>} | ||
| */ | ||
| async findPeer (id, options) { // eslint-disable-line require-await | ||
| if (!this._routers.length) { | ||
| throw errCode(new Error('No peer routers available'), 'NO_ROUTERS_AVAILABLE') | ||
| } | ||
|
|
||
| return pAny(this._routers.map(async (router) => { | ||
| const result = await router.findPeer(id, options) | ||
|
|
||
| // If we don't have a result, we need to provide an error to keep trying | ||
| if (!result || Object.keys(result).length === 0) { | ||
| throw errCode(new Error('not found'), 'NOT_FOUND') | ||
| } | ||
|
|
||
| return pAny(routers.map(async (router) => { | ||
| const result = await router.findPeer(id, options) | ||
| return result | ||
| })) | ||
| } | ||
|
|
||
| /** | ||
| * Attempt to find the closest peers on the network to the given key. | ||
| * | ||
| * @param {Uint8Array} key - A CID like key | ||
| * @param {Object} [options] | ||
| * @param {number} [options.timeout=30e3] - How long the query can take. | ||
| * @returns {AsyncIterable<{ id: PeerId, multiaddrs: Multiaddr[] }>} | ||
| */ | ||
| async * getClosestPeers (key, options = { timeout: 30e3 }) { | ||
| if (!this._routers.length) { | ||
| throw errCode(new Error('No peer routers available'), 'NO_ROUTERS_AVAILABLE') | ||
| } | ||
|
|
||
| // If we don't have a result, we need to provide an error to keep trying | ||
| if (!result || Object.keys(result).length === 0) { | ||
| const result = await pAny( | ||
| this._routers.map(async (router) => { | ||
| const peers = await all(router.getClosestPeers(key, options)) | ||
|
|
||
| if (!peers || !peers.length) { | ||
| throw errCode(new Error('not found'), 'NOT_FOUND') | ||
| } | ||
| return peers | ||
| }) | ||
| ) | ||
|
|
||
| return result | ||
| })) | ||
| for (const peer of result) { | ||
| yield peer | ||
| } | ||
| } | ||
| } | ||
|
|
||
| module.exports = PeerRouting |
Oops, something went wrong.