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feat: provide default libp2p instance (#127)
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The original intention was to allow users to configure a libp2p node to their requirements but it's a non-trivial undertaking unless the user is deeply familiar with the libp2p stack.

Instead, let's provide node and browser libp2p instances with sensible defaults that give the user the best chance of success on first try.

Fixes #121
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achingbrain committed May 19, 2023
1 parent a4477ca commit 45c9d89
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Showing 15 changed files with 277 additions and 132 deletions.
31 changes: 22 additions & 9 deletions packages/helia/package.json
Original file line number Diff line number Diff line change
Expand Up @@ -138,18 +138,30 @@
"release": "aegir release"
},
"dependencies": {
"@chainsafe/libp2p-gossipsub": "^8.0.0",
"@chainsafe/libp2p-noise": "^12.0.0",
"@chainsafe/libp2p-yamux": "^4.0.2",
"@helia/interface": "^1.0.0",
"@ipld/dag-pb": "^4.0.2",
"@libp2p/interface-libp2p": "^1.1.0",
"@libp2p/interfaces": "^3.3.1",
"@libp2p/logger": "^2.0.5",
"@ipld/dag-pb": "^4.0.3",
"@libp2p/bootstrap": "^8.0.0",
"@libp2p/interface-libp2p": "^3.1.0",
"@libp2p/interface-pubsub": "^4.0.1",
"@libp2p/interfaces": "^3.3.2",
"@libp2p/ipni-content-routing": "^1.0.0",
"@libp2p/kad-dht": "^9.3.3",
"@libp2p/logger": "^2.0.7",
"@libp2p/mdns": "^8.0.0",
"@libp2p/mplex": "^8.0.3",
"@libp2p/tcp": "^7.0.1",
"@libp2p/webrtc": "^2.0.4",
"@libp2p/webtransport": "^2.0.1",
"blockstore-core": "^4.0.0",
"cborg": "^1.10.0",
"datastore-core": "^9.0.0",
"interface-blockstore": "^5.0.0",
"interface-datastore": "^8.0.0",
"interface-store": "^5.0.1",
"ipfs-bitswap": "^17.0.0",
"ipfs-bitswap": "^18.0.0",
"it-all": "^3.0.1",
"it-drain": "^3.0.1",
"it-filter": "^3.0.1",
Expand All @@ -162,18 +174,19 @@
"uint8arrays": "^4.0.3"
},
"devDependencies": {
"@chainsafe/libp2p-noise": "^11.0.0",
"@chainsafe/libp2p-yamux": "^3.0.5",
"@ipld/dag-cbor": "^9.0.0",
"@ipld/dag-json": "^10.0.1",
"@libp2p/websockets": "^5.0.3",
"@libp2p/websockets": "^6.0.1",
"@types/sinon": "^10.0.14",
"aegir": "^39.0.4",
"delay": "^5.0.0",
"libp2p": "^0.44.0",
"libp2p": "^0.45.1",
"sinon": "^15.0.2",
"sinon-ts": "^1.0.0"
},
"browser": {
"./dist/src/utils/libp2p.js": "./dist/src/utils/libp2p.browser.js"
},
"typedoc": {
"entryPoint": "./src/index.ts"
}
Expand Down
65 changes: 22 additions & 43 deletions packages/helia/src/helia.ts
Original file line number Diff line number Diff line change
@@ -1,6 +1,4 @@
import { logger } from '@libp2p/logger'
import { MemoryBlockstore } from 'blockstore-core'
import { MemoryDatastore } from 'datastore-core'
import { type Bitswap, createBitswap } from 'ipfs-bitswap'
import drain from 'it-drain'
import { identity } from 'multiformats/hashes/identity'
Expand All @@ -13,12 +11,19 @@ import type { HeliaInit } from '.'
import type { GCOptions, Helia } from '@helia/interface'
import type { Pins } from '@helia/interface/pins'
import type { Libp2p } from '@libp2p/interface-libp2p'
import type { Blockstore } from 'interface-blockstore'
import type { Datastore } from 'interface-datastore'
import type { CID } from 'multiformats/cid'
import type { MultihashHasher } from 'multiformats/hashes/interface'

const log = logger('helia')

interface HeliaImplInit<T extends Libp2p = Libp2p> extends HeliaInit<T> {
libp2p: T
blockstore: Blockstore
datastore: Datastore
}

export class HeliaImpl implements Helia {
public libp2p: Libp2p
public blockstore: BlockStorage
Expand All @@ -27,64 +32,38 @@ export class HeliaImpl implements Helia {

#bitswap?: Bitswap

constructor (init: HeliaInit) {
constructor (init: HeliaImplInit) {
const hashers: MultihashHasher[] = [
sha256,
sha512,
identity,
...(init.hashers ?? [])
]

const datastore = init.datastore ?? new MemoryDatastore()
const blockstore = init.blockstore ?? new MemoryBlockstore()
this.#bitswap = createBitswap(init.libp2p, init.blockstore, {
hashLoader: {
getHasher: async (codecOrName: string | number): Promise<MultihashHasher<number>> => {
const hasher = hashers.find(hasher => {
return hasher.code === codecOrName || hasher.name === codecOrName
})

// @ts-expect-error incomplete libp2p implementation
const libp2p = init.libp2p ?? new Proxy<Libp2p>({}, {
get (_, prop): true | (() => void) {
const noop = (): void => {}
const noops = ['start', 'stop']

if (noops.includes(prop.toString())) {
return noop
}
if (hasher != null) {
return hasher
}

if (prop === 'isProxy') {
return true
throw new Error(`Could not load hasher for code/name "${codecOrName}"`)
}

throw new Error('Please configure Helia with a libp2p instance')
},
set (): never {
throw new Error('Please configure Helia with a libp2p instance')
}
})

if (init.libp2p != null) {
this.#bitswap = createBitswap(libp2p, blockstore, {
hashLoader: {
getHasher: async (codecOrName: string | number): Promise<MultihashHasher<number>> => {
const hasher = hashers.find(hasher => {
return hasher.code === codecOrName || hasher.name === codecOrName
})

if (hasher != null) {
return hasher
}

throw new Error(`Could not load hasher for code/name "${codecOrName}"`)
}
}
})
}

this.pins = new PinsImpl(datastore, blockstore, init.dagWalkers ?? [])
this.pins = new PinsImpl(init.datastore, init.blockstore, init.dagWalkers ?? [])

this.libp2p = libp2p
this.blockstore = new BlockStorage(blockstore, this.pins, {
this.libp2p = init.libp2p
this.blockstore = new BlockStorage(init.blockstore, this.pins, {
bitswap: this.#bitswap,
holdGcLock: init.holdGcLock
})
this.datastore = datastore
this.datastore = init.datastore
}

async start (): Promise<void> {
Expand Down
33 changes: 24 additions & 9 deletions packages/helia/src/index.ts
Original file line number Diff line number Diff line change
Expand Up @@ -6,7 +6,6 @@
* @example
*
* ```typescript
* import { createLibp2p } from 'libp2p'
* import { MemoryDatastore } from 'datastore-core'
* import { MemoryBlockstore } from 'blockstore-core'
* import { createHelia } from 'helia'
Expand All @@ -15,19 +14,21 @@
*
* const node = await createHelia({
* blockstore: new MemoryBlockstore(),
* datastore: new MemoryDatastore(),
* libp2p: await createLibp2p({
* //... libp2p options
* })
* datastore: new MemoryDatastore()
* })
* const fs = unixfs(node)
* fs.cat(CID.parse('bafyFoo'))
* ```
*/

import { MemoryBlockstore } from 'blockstore-core'
import { MemoryDatastore } from 'datastore-core'
import { HeliaImpl } from './helia.js'
import { createLibp2p } from './utils/libp2p.js'
import type { Helia } from '@helia/interface'
import type { Libp2p } from '@libp2p/interface-libp2p'
import type { PubSub } from '@libp2p/interface-pubsub'
import type { DualKadDHT } from '@libp2p/kad-dht'
import type { Blockstore } from 'interface-blockstore'
import type { Datastore } from 'interface-datastore'
import type { CID } from 'multiformats/cid'
Expand All @@ -44,11 +45,11 @@ export interface DAGWalker {
/**
* Options used to create a Helia node.
*/
export interface HeliaInit {
export interface HeliaInit<T extends Libp2p = Libp2p> {
/**
* A libp2p node is required to perform network operations
*/
libp2p?: Libp2p
libp2p?: T

/**
* The blockstore is where blocks are stored
Expand Down Expand Up @@ -100,8 +101,22 @@ export interface HeliaInit {
/**
* Create and return a Helia node
*/
export async function createHelia (init: HeliaInit = {}): Promise<Helia> {
const helia = new HeliaImpl(init)
export async function createHelia <T extends Libp2p> (init: HeliaInit<T>): Promise<Helia<T>>
export async function createHelia (init?: HeliaInit<Libp2p<{ dht: DualKadDHT, pubsub: PubSub }>>): Promise<Helia<Libp2p<{ dht: DualKadDHT, pubsub: PubSub }>>>
export async function createHelia (init: HeliaInit = {}): Promise<Helia<unknown>> {
const datastore = init.datastore ?? new MemoryDatastore()
const blockstore = init.blockstore ?? new MemoryBlockstore()
const libp2p = init.libp2p ?? await createLibp2p({
datastore,
start: false
})

const helia = new HeliaImpl({
...init,
datastore,
blockstore,
libp2p
})

if (init.start !== false) {
await helia.start()
Expand Down
68 changes: 68 additions & 0 deletions packages/helia/src/utils/libp2p.browser.ts
Original file line number Diff line number Diff line change
@@ -0,0 +1,68 @@
import { gossipsub } from '@chainsafe/libp2p-gossipsub'
import { noise } from '@chainsafe/libp2p-noise'
import { yamux } from '@chainsafe/libp2p-yamux'
import { bootstrap } from '@libp2p/bootstrap'
import { ipniContentRouting } from '@libp2p/ipni-content-routing'
import { kadDHT, type DualKadDHT } from '@libp2p/kad-dht'
import { mplex } from '@libp2p/mplex'
import { webRTC, webRTCDirect } from '@libp2p/webrtc'
import { webSockets } from '@libp2p/websockets'
import { webTransport } from '@libp2p/webtransport'
import { createLibp2p as create } from 'libp2p'
import { autoNATService } from 'libp2p/autonat'
import { circuitRelayTransport, circuitRelayServer } from 'libp2p/circuit-relay'
import { identifyService } from 'libp2p/identify'
import type { CreateLibp2pOptions } from './libp2p.js'
import type { Libp2p } from '@libp2p/interface-libp2p'
import type { PubSub } from '@libp2p/interface-pubsub'

export async function createLibp2p (opts: CreateLibp2pOptions): Promise<Libp2p<{ dht: DualKadDHT, pubsub: PubSub }>> {
return create({
...opts,
addresses: {
listen: [
'/webrtc'
]
},
transports: [
webRTC(),
webRTCDirect(),
webTransport(),
webSockets(),
circuitRelayTransport({
discoverRelays: 1
})
],
connectionEncryption: [
noise()
],
streamMuxers: [
yamux(),
mplex()
],
peerDiscovery: [
bootstrap({
list: [
'/dnsaddr/bootstrap.libp2p.io/p2p/QmNnooDu7bfjPFoTZYxMNLWUQJyrVwtbZg5gBMjTezGAJN',
'/dnsaddr/bootstrap.libp2p.io/p2p/QmQCU2EcMqAqQPR2i9bChDtGNJchTbq5TbXJJ16u19uLTa',
'/dnsaddr/bootstrap.libp2p.io/p2p/QmbLHAnMoJPWSCR5Zhtx6BHJX9KiKNN6tpvbUcqanj75Nb',
'/dnsaddr/bootstrap.libp2p.io/p2p/QmcZf59bWwK5XFi76CZX8cbJ4BhTzzA3gU1ZjYZcYW3dwt'
]
})
],
contentRouters: [
ipniContentRouting('https://cid.contact')
],
services: {
identify: identifyService(),
autoNAT: autoNATService(),
pubsub: gossipsub(),
dht: kadDHT({
clientMode: true
}),
relay: circuitRelayServer({
advertise: true
})
}
})
}
72 changes: 72 additions & 0 deletions packages/helia/src/utils/libp2p.ts
Original file line number Diff line number Diff line change
@@ -0,0 +1,72 @@
import { gossipsub } from '@chainsafe/libp2p-gossipsub'
import { noise } from '@chainsafe/libp2p-noise'
import { yamux } from '@chainsafe/libp2p-yamux'
import { bootstrap } from '@libp2p/bootstrap'
import { ipniContentRouting } from '@libp2p/ipni-content-routing'
import { type DualKadDHT, kadDHT } from '@libp2p/kad-dht'
import { mdns } from '@libp2p/mdns'
import { mplex } from '@libp2p/mplex'
import { tcp } from '@libp2p/tcp'
import { webSockets } from '@libp2p/websockets'
import { createLibp2p as create } from 'libp2p'
import { autoNATService } from 'libp2p/autonat'
import { circuitRelayTransport, circuitRelayServer, type CircuitRelayService } from 'libp2p/circuit-relay'
import { identifyService } from 'libp2p/identify'
import { uPnPNATService } from 'libp2p/upnp-nat'
import type { Libp2p } from '@libp2p/interface-libp2p'
import type { PubSub } from '@libp2p/interface-pubsub'
import type { Datastore } from 'interface-datastore'

export interface CreateLibp2pOptions {
datastore: Datastore
start?: boolean
}

export async function createLibp2p (opts: CreateLibp2pOptions): Promise<Libp2p<{ dht: DualKadDHT, pubsub: PubSub, relay: CircuitRelayService }>> {
return create({
...opts,
addresses: {
listen: [
'/ip4/0.0.0.0/tcp/0'
]
},
transports: [
tcp(),
webSockets(),
circuitRelayTransport({
discoverRelays: 1
})
],
connectionEncryption: [
noise()
],
streamMuxers: [
yamux(),
mplex()
],
peerDiscovery: [
mdns(),
bootstrap({
list: [
'/dnsaddr/bootstrap.libp2p.io/p2p/QmNnooDu7bfjPFoTZYxMNLWUQJyrVwtbZg5gBMjTezGAJN',
'/dnsaddr/bootstrap.libp2p.io/p2p/QmQCU2EcMqAqQPR2i9bChDtGNJchTbq5TbXJJ16u19uLTa',
'/dnsaddr/bootstrap.libp2p.io/p2p/QmbLHAnMoJPWSCR5Zhtx6BHJX9KiKNN6tpvbUcqanj75Nb',
'/dnsaddr/bootstrap.libp2p.io/p2p/QmcZf59bWwK5XFi76CZX8cbJ4BhTzzA3gU1ZjYZcYW3dwt'
]
})
],
contentRouters: [
ipniContentRouting('https://cid.contact')
],
services: {
identify: identifyService(),
autoNAT: autoNATService(),
upnp: uPnPNATService(),
pubsub: gossipsub(),
dht: kadDHT(),
relay: circuitRelayServer({
advertise: true
})
}
})
}
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