LibP2P on the Polkadot Network

Users and Developers
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Error: dialed to the wrong peer, Ids do not match

I faced similar issue when connecting Rust & JS via libp2p. The problem is that peer-id JS computes peer id from public key like this:

const computeDigest = (pubKey, cb) => {
  if (pubKey.bytes.length <= 42) {
    const digest = mh.encode(pubKey.bytes, 'identity') // This get's executed
    cb(null, digest)
  } else {
    pubKey.hash((err, digest) => {
      cb(err, digest)
    })
  }
}

Result is that in JS mh.encode(pubKey.bytes, 'identity') results in addresses of format 12D3KooWSwNXzEeGjgwEocRJBzbdoDqxbz3LdrwgSuKmKeGvbM4G, while in Rust PeerId for the same public key looks like QmTESkr2vWDCKqiHVsyvf4iRQCBgvNDqBJ6P3yTTDb6haw.

Error then happens in libp2p-secio/src/handshake/crypto.js in identify function in JS:

if (state.id.remote.toB58String() !== remoteId.toB58String()) { // <-- remoteId here is computed from public key in 12D3 format, while state.id.remote is in Qm format
    return callback(new Error('dialed to the wrong peer, Ids do not match'))
}

Currently, I don’t have a solution for that except to patch either JS or Rust.