initHelia.ts

import { noise } from '@chainsafe/libp2p-noise'
import { yamux } from '@chainsafe/libp2p-yamux'
import { type Helia } from '@helia/interface'
import { delegatedContentRouting } from '@libp2p/delegated-content-routing'
import { delegatedPeerRouting } from '@libp2p/delegated-peer-routing'
import { mplex } from '@libp2p/mplex'
import { webRTC, webRTCDirect } from '@libp2p/webrtc'
import { webSockets } from '@libp2p/websockets'
import { webTransport } from '@libp2p/webtransport'
import { MemoryBlockstore } from 'blockstore-core'
import { MemoryDatastore } from 'datastore-core'
import {createHelia} from 'helia'
import { type create as createKuboClient } from 'kubo-rpc-client'
import { createLibp2p } from 'libp2p'
import { autoNATService } from 'libp2p/autonat'
import { circuitRelayTransport } from 'libp2p/circuit-relay'
import { identifyService } from 'libp2p/identify'

//import { addDagNodeToHelia } from '../lib/helpers'
export async function initHelia(
    kuboClient: ReturnType<typeof createKuboClient>
): Promise<Helia> {
    const blockstore = new MemoryBlockstore()
    const datastore = new MemoryDatastore()

    /**
     * based on https://github.com/ipfs/helia/blob/ed4985677b62021f76541354ad06b70bd53e929a/packages/helia/src/utils/libp2p.browser.ts#L20
     */
    const libp2p = await createLibp2p({
        start: true, // TODO: libp2p bug with stop/start - https://github.com/libp2p/js-libp2p/issues/1787
        peerRouters: [
            delegatedPeerRouting(kuboClient)
        ],
        contentRouters: [
            delegatedContentRouting(kuboClient)
        ],
        datastore,
        transports: [
          webRTC(),
          webRTCDirect(),
          webTransport(),
          webSockets(),
          circuitRelayTransport({
            discoverRelays: 1
          })
        ],
        connectionEncryption: [
          noise()
        ],
        streamMuxers: [
          yamux(),
          mplex()
        ],
        services: {
          identify: identifyService(),
          autoNAT: autoNATService()
        }
    })

    const helia = await createHelia({
        datastore,
        blockstore,
        libp2p
    })

    // add helia-only examples
    //await addDagNodeToHelia(helia, await import('@ipld/dag-json'), { hello: 'world' }) // baguqeerasords4njcts6vs7qvdjfcvgnume4hqohf65zsfguprqphs3icwea

    return helia
}