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connection-manager.ts
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connection-manager.ts
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import { UnsupportedOperationError, isPeerId } from '@libp2p/interface'
import { PeerMap } from '@libp2p/peer-collections'
import { peerIdFromString } from '@libp2p/peer-id'
import { isMultiaddr, type Multiaddr } from '@multiformats/multiaddr'
import { connectionPair } from './connection.js'
import type { PrivateKey, PeerId, ComponentLogger, Libp2pEvents, PendingDial, Connection, TypedEventTarget, PubSub, Startable } from '@libp2p/interface'
import type { ConnectionManager, Registrar } from '@libp2p/interface-internal'
export interface MockNetworkComponents {
peerId: PeerId
privateKey: PrivateKey
registrar: Registrar
connectionManager: ConnectionManager
events: TypedEventTarget<Libp2pEvents>
pubsub?: PubSub
logger: ComponentLogger
}
class MockNetwork {
private components: MockNetworkComponents[] = []
addNode (components: MockNetworkComponents): void {
this.components.push(components)
}
getNode (peerId: PeerId | Multiaddr []): MockNetworkComponents {
if (Array.isArray(peerId) && peerId.length > 0) {
peerId = peerIdFromString(peerId[0].getPeerId() ?? '')
} else if (isPeerId(peerId)) {
for (const components of this.components) {
if (peerId.equals(components.peerId)) {
return components
}
}
}
throw new Error('Peer not found')
}
reset (): void {
this.components = []
}
}
export const mockNetwork = new MockNetwork()
export interface MockConnectionManagerComponents {
peerId: PeerId
registrar: Registrar
events: TypedEventTarget<Libp2pEvents>
}
class MockConnectionManager implements ConnectionManager, Startable {
private connections: Connection[] = []
private readonly components: MockConnectionManagerComponents
private started = false
constructor (components: MockConnectionManagerComponents) {
this.components = components
}
isStarted (): boolean {
return this.started
}
async start (): Promise<void> {
this.started = true
}
async stop (): Promise<void> {
for (const connection of this.connections) {
await this.closeConnections(connection.remotePeer)
}
this.started = false
}
getConnections (peerId?: PeerId): Connection[] {
if (peerId != null) {
return this.connections
.filter(c => c.remotePeer.toString() === peerId.toString())
}
return this.connections
}
getConnectionsMap (): PeerMap<Connection[]> {
const map = new PeerMap<Connection[]>()
for (const conn of this.connections) {
const conns: Connection[] = map.get(conn.remotePeer) ?? []
conns.push(conn)
map.set(conn.remotePeer, conns)
}
return map
}
async openConnection (peerId: PeerId | Multiaddr | Multiaddr[]): Promise<Connection> {
if (isMultiaddr(peerId)) {
throw new UnsupportedOperationError('Dialing multiaddrs not supported')
}
let existingConnections: Connection[] = []
if (Array.isArray(peerId) && peerId.length > 0) {
existingConnections = this.getConnections(peerIdFromString(peerId[0].getPeerId() ?? ''))
} else if (isPeerId(peerId)) {
existingConnections = this.getConnections(peerId)
}
if (existingConnections.length > 0) {
return existingConnections[0]
}
const componentsB = mockNetwork.getNode(peerId)
const [aToB, bToA] = connectionPair(this.components, componentsB)
// track connections
this.connections.push(aToB)
;(componentsB.connectionManager as MockConnectionManager).connections.push(bToA)
this.components.events.safeDispatchEvent('connection:open', {
detail: aToB
})
for (const protocol of this.components.registrar.getProtocols()) {
for (const topology of this.components.registrar.getTopologies(protocol)) {
topology.onConnect?.(componentsB.peerId, aToB)
}
}
this.components.events.safeDispatchEvent('peer:connect', { detail: componentsB.peerId })
componentsB.events.safeDispatchEvent('connection:open', {
detail: bToA
})
for (const protocol of componentsB.registrar.getProtocols()) {
for (const topology of componentsB.registrar.getTopologies(protocol)) {
topology.onConnect?.(this.components.peerId, bToA)
}
}
componentsB.events.safeDispatchEvent('peer:connect', { detail: this.components.peerId })
return aToB
}
async closeConnections (peerId: PeerId): Promise<void> {
const connections = this.getConnections(peerId)
if (connections.length === 0) {
return
}
const componentsB = mockNetwork.getNode(peerId)
for (const protocol of this.components.registrar.getProtocols()) {
this.components.registrar.getTopologies(protocol).forEach(topology => {
topology.onDisconnect?.(componentsB.peerId)
})
}
for (const conn of connections) {
await conn.close()
}
this.connections = this.connections.filter(c => !c.remotePeer.equals(peerId))
if (this.connections.filter(c => !c.remotePeer.equals(peerId)).length === 0) {
componentsB.events.safeDispatchEvent('peer:disconnect', { detail: peerId })
}
await componentsB.connectionManager?.closeConnections(this.components.peerId)
if (componentsB.connectionManager?.getConnectionsMap().get(this.components.peerId) == null) {
componentsB.events.safeDispatchEvent('peer:disconnect', { detail: this.components.peerId })
}
}
async acceptIncomingConnection (): Promise<boolean> {
return true
}
afterUpgradeInbound (): void {
}
getDialQueue (): PendingDial[] {
return []
}
async isDialable (): Promise<boolean> {
return true
}
}
export function mockConnectionManager (components: MockConnectionManagerComponents): ConnectionManager {
return new MockConnectionManager(components)
}