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| 1 | +'use strict' |
| 2 | +/* eslint-env mocha */ |
| 3 | + |
| 4 | +const chai = require('chai') |
| 5 | +chai.use(require('dirty-chai')) |
| 6 | + |
| 7 | +const defer = require('p-defer') |
| 8 | +const mergeOptions = require('merge-options') |
| 9 | + |
| 10 | +const Bootstrap = require('libp2p-bootstrap') |
| 11 | +const crypto = require('libp2p-crypto') |
| 12 | +const KadDht = require('libp2p-kad-dht') |
| 13 | +const MulticastDNS = require('libp2p-mdns') |
| 14 | +const multiaddr = require('multiaddr') |
| 15 | + |
| 16 | +const Libp2p = require('../../src') |
| 17 | +const baseOptions = require('../utils/base-options') |
| 18 | +const { createPeerInfoFromFixture } = require('../utils/creators/peer') |
| 19 | + |
| 20 | +describe('peer discovery scenarios', () => { |
| 21 | + let peerInfo, remotePeerInfo1, remotePeerInfo2 |
| 22 | + let libp2p |
| 23 | + |
| 24 | + before(async () => { |
| 25 | + [peerInfo, remotePeerInfo1, remotePeerInfo2] = await createPeerInfoFromFixture(3) |
| 26 | + |
| 27 | + peerInfo.multiaddrs.add(multiaddr('/ip4/127.0.0.1/tcp/0')) |
| 28 | + remotePeerInfo1.multiaddrs.add(multiaddr('/ip4/127.0.0.1/tcp/0')) |
| 29 | + remotePeerInfo2.multiaddrs.add(multiaddr('/ip4/127.0.0.1/tcp/0')) |
| 30 | + }) |
| 31 | + |
| 32 | + afterEach(async () => { |
| 33 | + libp2p && await libp2p.stop() |
| 34 | + }) |
| 35 | + |
| 36 | + it('bootstrap should discover all peers in the list', async () => { |
| 37 | + const deferred = defer() |
| 38 | + |
| 39 | + const bootstrappers = [ |
| 40 | + ...remotePeerInfo1.multiaddrs.toArray().map((ma) => `${ma}/p2p/${remotePeerInfo1.id.toB58String()}`), |
| 41 | + ...remotePeerInfo2.multiaddrs.toArray().map((ma) => `${ma}/p2p/${remotePeerInfo2.id.toB58String()}`) |
| 42 | + ] |
| 43 | + |
| 44 | + libp2p = new Libp2p(mergeOptions(baseOptions, { |
| 45 | + peerInfo, |
| 46 | + modules: { |
| 47 | + peerDiscovery: [Bootstrap] |
| 48 | + }, |
| 49 | + config: { |
| 50 | + peerDiscovery: { |
| 51 | + bootstrap: { |
| 52 | + enabled: true, |
| 53 | + list: bootstrappers |
| 54 | + } |
| 55 | + } |
| 56 | + } |
| 57 | + })) |
| 58 | + |
| 59 | + const expectedPeers = new Set([ |
| 60 | + remotePeerInfo1.id.toB58String(), |
| 61 | + remotePeerInfo2.id.toB58String() |
| 62 | + ]) |
| 63 | + |
| 64 | + libp2p.on('peer:discovery', (peerInfo) => { |
| 65 | + expectedPeers.delete(peerInfo.id.toB58String()) |
| 66 | + if (expectedPeers.size === 0) { |
| 67 | + libp2p.removeAllListeners('peer:discovery') |
| 68 | + deferred.resolve() |
| 69 | + } |
| 70 | + }) |
| 71 | + |
| 72 | + await libp2p.start() |
| 73 | + |
| 74 | + return deferred.promise |
| 75 | + }) |
| 76 | + |
| 77 | + it('MulticastDNS should discover all peers on the local network', async () => { |
| 78 | + const deferred = defer() |
| 79 | + |
| 80 | + const getConfig = (peerInfo) => mergeOptions(baseOptions, { |
| 81 | + peerInfo, |
| 82 | + modules: { |
| 83 | + peerDiscovery: [MulticastDNS] |
| 84 | + }, |
| 85 | + config: { |
| 86 | + peerDiscovery: { |
| 87 | + mdns: { |
| 88 | + enabled: true, |
| 89 | + interval: 200, // discover quickly |
| 90 | + // use a random tag to prevent CI collision |
| 91 | + serviceTag: crypto.randomBytes(10).toString('hex') |
| 92 | + } |
| 93 | + } |
| 94 | + } |
| 95 | + }) |
| 96 | + |
| 97 | + libp2p = new Libp2p(getConfig(peerInfo)) |
| 98 | + const remoteLibp2p1 = new Libp2p(getConfig(remotePeerInfo1)) |
| 99 | + const remoteLibp2p2 = new Libp2p(getConfig(remotePeerInfo2)) |
| 100 | + |
| 101 | + const expectedPeers = new Set([ |
| 102 | + remotePeerInfo1.id.toB58String(), |
| 103 | + remotePeerInfo2.id.toB58String() |
| 104 | + ]) |
| 105 | + |
| 106 | + libp2p.on('peer:discovery', (peerInfo) => { |
| 107 | + expectedPeers.delete(peerInfo.id.toB58String()) |
| 108 | + if (expectedPeers.size === 0) { |
| 109 | + libp2p.removeAllListeners('peer:discovery') |
| 110 | + deferred.resolve() |
| 111 | + } |
| 112 | + }) |
| 113 | + |
| 114 | + await remoteLibp2p1.start() |
| 115 | + await remoteLibp2p2.start() |
| 116 | + await libp2p.start() |
| 117 | + |
| 118 | + await deferred.promise |
| 119 | + |
| 120 | + await remoteLibp2p1.stop() |
| 121 | + await remoteLibp2p2.stop() |
| 122 | + }) |
| 123 | + |
| 124 | + it('kad-dht should discover other peers', async () => { |
| 125 | + const deferred = defer() |
| 126 | + |
| 127 | + const getConfig = (peerInfo) => mergeOptions(baseOptions, { |
| 128 | + peerInfo, |
| 129 | + modules: { |
| 130 | + dht: KadDht |
| 131 | + }, |
| 132 | + config: { |
| 133 | + dht: { |
| 134 | + randomWalk: { |
| 135 | + enabled: true, |
| 136 | + delay: 100, |
| 137 | + interval: 200, // start the query sooner |
| 138 | + timeout: 3000 |
| 139 | + }, |
| 140 | + enabled: true |
| 141 | + } |
| 142 | + } |
| 143 | + }) |
| 144 | + |
| 145 | + libp2p = new Libp2p(getConfig(peerInfo)) |
| 146 | + const remoteLibp2p1 = new Libp2p(getConfig(remotePeerInfo1)) |
| 147 | + const remoteLibp2p2 = new Libp2p(getConfig(remotePeerInfo2)) |
| 148 | + |
| 149 | + libp2p.on('peer:discovery', (peerInfo) => { |
| 150 | + if (peerInfo.id.toB58String() === remotePeerInfo2.id.toB58String()) { |
| 151 | + libp2p.removeAllListeners('peer:discovery') |
| 152 | + deferred.resolve() |
| 153 | + } |
| 154 | + }) |
| 155 | + |
| 156 | + await remoteLibp2p1.start() |
| 157 | + await remoteLibp2p2.start() |
| 158 | + await libp2p.start() |
| 159 | + |
| 160 | + // Topology: |
| 161 | + // A -> B |
| 162 | + // C -> B |
| 163 | + await Promise.all([ |
| 164 | + libp2p.dial(remotePeerInfo1), |
| 165 | + remoteLibp2p2.dial(remotePeerInfo1) |
| 166 | + ]) |
| 167 | + |
| 168 | + await deferred.promise |
| 169 | + await remoteLibp2p1.stop() |
| 170 | + await remoteLibp2p2.stop() |
| 171 | + }) |
| 172 | +}) |
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