ctrlpanel/database/migrations/2021_07_09_190453_create_vouchers_table.php

<?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

return new class extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('vouchers', function (Blueprint $table) {
            $table->id();
            $table->string('code', 36)->unique();
            $table->string('memo')->nullable();
            $table->unsignedFloat('credits', 10);
            $table->unsignedInteger('uses')->default(1);
            $table->timestamp('expires_at')->nullable();
            $table->timestamps();
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::dropIfExists('vouchers');
    }
};