crater/app/Mail/InvoicePdf.php

<?php
namespace Crater\Mail;

use Illuminate\Bus\Queueable;
use Illuminate\Mail\Mailable;
use Illuminate\Queue\SerializesModels;
use Illuminate\Contracts\Queue\ShouldQueue;

class InvoicePdf extends Mailable
{
    use Queueable, SerializesModels;

    public $data = [];

    /**
     * Create a new message instance.
     *
     * @return void
     */
    public function __construct($data)
    {
        $this->data = $data;
    }

    /**
     * Build the message.
     *
     * @return $this
     */
    public function build()
    {
        $company = $this->data['company']['name'];

        return $this->subject("Invoice from $company")
                    ->markdown('emails.send.invoice', ['data', $this->data]);
    }
}