ctrlpanel/database/migrations/2022_06_02_091921_table-user-referrals.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('user_referrals', function (Blueprint $table) {
            $table->unsignedBigInteger('referral_id');
            $table->unsignedBigInteger('registered_user_id');
            $table->foreign('referral_id')->references('id')->on('users')->onDelete('cascade');
            $table->foreign('registered_user_id')->references('id')->on('users')->onDelete('cascade');
            $table->timestamps();
        });
    }

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