Kraken\Channel\Model\Zmq\ZmqModel::start PHP Method

    public function start($blockEvent = false)
    {
        if ($this->isStarted()) {
            return false;
        }
        $connect = $this->connectCallback;
        if (!$this->socket->{$connect}($this->endpoint)) {
            $this->emit('error', [new ExecutionException('socket not connected.')]);
            return false;
        }
        $this->stopHeartbeat();
        $this->stopTimeRegister();
        $this->isConnected = true;
        $this->startHeartbeat();
        $this->startTimeRegister();
        $this->connectionPool->erase();
        $this->buffer->send();
        if (!$blockEvent) {
            $this->emit('start');
        }
        return true;
    }