"First shared hypercore must be the same" when trying to replicate via webrtc.

I’m trying to replicate a db over webrtc-swarm and always running into the dreaded “First shared hypercore must be the same” message.

Below is the code I am trying to use. I use the same key for both dbs, and as far as i can tell i am looping both replication streams similarly to the tcp example in #19 .

Does anyone notice anything I’m doing wrong?

const wrtc = require('wrtc')
const swarm = require('webrtc-swarm')

const signalhub = require('signalhub')
const hyperdb = require('hyperdb')

const db1 = init_db('./db1', { valueEncoding: 'utf-8' })

db1.on('ready', () => {
    const db2 = init_db('./db2', db1.key, { valueEncoding: 'utf-8' })
    db2.on('ready', () => {
        db1.put('/hello', 'world', () => {
            init_swarm(db1, (hub) => {
                return swarm(hub, {
                    wrtc: wrtc
                })
            })
            init_swarm(db2, (hub) => {
                return swarm(hub, {
                    wrtc: wrtc
                })
            })
        })

    })
})

function init_swarm(db, swarmfn) {
    const hub = signalhub('freemate', ['https://signalhub.mafintosh.com'])

    const sw = swarmfn(hub)

    sw.on('peer', (peer, id) => {
        console.log('found peer')
        const repstream = db.replicate()
        peer.on('data', (data) => {
            console.log('id: ', id, ' got data: ', data)
        })
        repstream.pipe(peer).pipe(repstream)
        peer.once('finish', (err) => console.log(err))
        peer.once('error', (err) => console.log(err))
    })

    return sw
}

function init_db(location) {
    const db = hyperdb(location, { valueEncoding: 'utf-8' })
    return db
}

[micahscopes]

@peacememories once you figure this out, I’d love to see your example!

[mafintosh]

@peacememories it’s part of the capability system and to have a joint discovery key. the first one to create the db, becomes the source. this simply means that the discoveryKey of the first one is the discovery key for the db forever. the first writer can disappear though without any issues.