code: function getDestination (addr) {
    const protos = addr.protoNames().reverse()
    const splitProto = protos.find(p => RelayProtos.includes(p))
    addr = addr.toString()
    if (!splitProto) return addr
    return addr.slice(addr.lastIndexOf(splitProto) + splitProto.length)
  }
docs: Get the destination address of a (possibly relay) multiaddr as a string
  
  @param {Multiaddr} addr
  @returns {String}