hainan/app/Listeners/SupplierEventSubscriber.php

<?php

namespace App\Listeners;

use App\Events\DepositUpdate;
use App\Models\DepositLog;
use App\Traits\StatementTraits;

class SupplierEventSubscriber
{
    public function onSupplierUpdated($event)
	{
		//处理流水事务
		$supplier = $event->supplier;

		//如果交易金有变动
		if ($supplier->isDirty('trade_balance')) {
			DepositLog::query()->create([
				'price' => bcsub($supplier->trade_balance,$supplier->getOriginal('trade_balance')),
				'type' => StatementTraits::$deposit[0],
				'supplier_id' => $supplier->id
			]);
		}
	}

	/**
	 * 为订阅者注册监听器
	 *
	 * @param  Illuminate\Events\Dispatcher $events
	 */
	public function subscribe($events)
	{
		$events->listen(
			DepositUpdate::class,
			SupplierEventSubscriber::class . '@onSupplierUpdated'
		);
	}
}